diff options
Diffstat (limited to 'arch')
85 files changed, 34 insertions, 4183 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index e6ff3026654..a0e47e27115 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -62,55 +62,16 @@ config IRQ_RELEASE_METHOD menu "UML-specific options" -config MODE_TT - bool "Tracing thread support (DEPRECATED)" - default n - depends on BROKEN - help - This option controls whether tracing thread support is compiled - into UML. This option is largely obsolete, given that skas0 provides - skas security and performance without needing to patch the host. - It is safe to say 'N' here; saying 'Y' may cause additional problems - with the resulting binary even if you run UML in SKAS mode, and running - in TT mode is strongly *NOT RECOMMENDED*. - config STATIC_LINK bool "Force a static link" default n - depends on !MODE_TT help - If CONFIG_MODE_TT is disabled, then this option gives you the ability - to force a static link of UML. Normally, if only skas mode is built - in to UML, it will be linked as a shared binary. This is inconvenient - for use in a chroot jail. So, if you intend to run UML inside a - chroot, and you disable CONFIG_MODE_TT, you probably want to say Y - here. + This option gives you the ability to force a static link of UML. + Normally, UML is linked as a shared binary. This is inconvenient for + use in a chroot jail. So, if you intend to run UML inside a chroot, + you probably want to say Y here. Additionally, this option enables using higher memory spaces (up to - 2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads - to best results for this. - -config KERNEL_HALF_GIGS - int "Kernel address space size (in .5G units)" - default "1" - depends on MODE_TT - help - This determines the amount of address space that UML will allocate for - its own, measured in half Gigabyte units. The default is 1. - Change this only if you need to boot UML with an unusually large amount - of physical memory. - -config MODE_SKAS - bool "Separate Kernel Address Space support" if MODE_TT - default y - help - This option controls whether skas (separate kernel address space) - support is compiled in. - Unless you have specific needs to use TT mode (which applies almost only - to developers), you should say Y here. - SKAS mode will make use of the SKAS3 patch if it is applied on the host - (and your UML will run in SKAS3 mode), but if no SKAS patch is applied - on the host it will run in SKAS0 mode, which is anyway faster than TT - mode. + 2.75G) for UML. source "arch/um/Kconfig.arch" source "mm/Kconfig" @@ -118,7 +79,7 @@ source "mm/Kconfig" config LD_SCRIPT_STATIC bool default y - depends on MODE_TT || STATIC_LINK + depends on STATIC_LINK config LD_SCRIPT_DYN bool @@ -220,7 +181,7 @@ config SMP bool "Symmetric multi-processing support (EXPERIMENTAL)" default n #SMP_BROKEN is for x86_64. - depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN)) + depends on EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN)) help This option enables UML SMP support. It is NOT related to having a real SMP box. Not directly, at least. @@ -258,11 +219,6 @@ config NEST_LEVEL inside another UML, set CONFIG_NEST_LEVEL to one more than the host UML. - Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to - greater than one, then the guest UML should have its CONFIG_NEST_LEVEL - set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. - Only change this if you are running nested UMLs. - config HIGHMEM bool "Highmem support (EXPERIMENTAL)" depends on !64BIT && EXPERIMENTAL @@ -271,9 +227,9 @@ config HIGHMEM This was used to allow UML to run with big amounts of memory. Currently it is unstable, so if unsure say N. - To use big amounts of memory, it is recommended to disable TT mode (i.e. - CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) - - this should allow the guest to use up to 2.75G of memory. + To use big amounts of memory, it is recommended enable static + linking (i.e. CONFIG_STATIC_LINK) - this should allow the + guest to use up to 2.75G of memory. config KERNEL_STACK_ORDER int "Kernel stack size order" diff --git a/arch/um/Kconfig.char b/arch/um/Kconfig.char index a5b079d5e86..1168936fb15 100644 --- a/arch/um/Kconfig.char +++ b/arch/um/Kconfig.char @@ -65,8 +65,6 @@ config XTERM_CHAN This option enables support for attaching UML consoles and serial lines to xterms. Each UML device so assigned will be brought up in its own xterm. - If you disable this option, then CONFIG_PT_PROXY will be disabled as - well, since UML's gdb currently requires an xterm. It is safe to say 'Y' here. config NOCONFIG_CHAN diff --git a/arch/um/Kconfig.debug b/arch/um/Kconfig.debug index c86f5eb29fd..1eace4bd661 100644 --- a/arch/um/Kconfig.debug +++ b/arch/um/Kconfig.debug @@ -2,28 +2,9 @@ menu "Kernel hacking" source "lib/Kconfig.debug" -config CMDLINE_ON_HOST - bool "Show command line arguments on the host in TT mode" - depends on MODE_TT - default !DEBUG_INFO - help - This controls whether arguments in guest processes should be shown on - the host's ps output. - Enabling this option hinders debugging on some recent GDB versions - (because GDB gets "confused" when we do an execvp()). So probably you - should disable it. - -config PT_PROXY - bool "Enable ptrace proxy" - depends on XTERM_CHAN && DEBUG_INFO && MODE_TT - help - This option enables a debugging interface which allows gdb to debug - the kernel without needing to actually attach to kernel threads. - If you want to do kernel debugging, say Y here; otherwise say N. - config GPROF bool "Enable gprof support" - depends on DEBUG_INFO && MODE_SKAS && !MODE_TT + depends on DEBUG_INFO help This allows profiling of a User-Mode Linux kernel with the gprof utility. @@ -36,7 +17,7 @@ config GPROF config GCOV bool "Enable gcov support" - depends on DEBUG_INFO && MODE_SKAS + depends on DEBUG_INFO help This option allows developers to retrieve coverage data from a UML session. diff --git a/arch/um/Makefile b/arch/um/Makefile index 3efc4ffb32a..e7aa0535f5d 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -31,18 +31,9 @@ SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \ $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h -um-modes-$(CONFIG_MODE_TT) += tt -um-modes-$(CONFIG_MODE_SKAS) += skas +MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/skas -MODE_INCLUDE += $(foreach mode,$(um-modes-y),\ - -I$(srctree)/$(ARCH_DIR)/include/$(mode)) - -MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\ - $(srctree)/$(ARCH_DIR)/Makefile-$(mode)) - -ifneq ($(MAKEFILES-INCL),) - include $(MAKEFILES-INCL) -endif +include $(srctree)/$(ARCH_DIR)/Makefile-skas ARCH_INCLUDE := -I$(ARCH_DIR)/include ifneq ($(KBUILD_SRC),) @@ -89,9 +80,8 @@ CFLAGS += $(call cc-option,-fno-unit-at-a-time,) # included; the values here are meaningless CONFIG_NEST_LEVEL ?= 0 -CONFIG_KERNEL_HALF_GIGS ?= 0 -SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) +SIZE = ($(CONFIG_NEST_LEVEL) * 0x20000000) PHONY += linux @@ -124,7 +114,6 @@ CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) $(call cc-option, -fno-stack-protector,) \ $(call cc-option, -fno-stack-protector-all,) -CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT CONFIG_KERNEL_STACK_ORDER ?= 2 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) @@ -132,11 +121,8 @@ ifndef START START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) endif -CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ - -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ - -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \ - -DKERNEL_STACK_SIZE=$(STACK_SIZE) \ - -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap.o +CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ + -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE) #The wrappers will select whether using "malloc" or the kernel allocator. LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 60107ed4905..ae61e3c271e 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -2,11 +2,7 @@ core-y += arch/um/sys-i386/ arch/x86/crypto/ TOP_ADDR := $(CONFIG_TOP_ADDR) -ifeq ($(CONFIG_MODE_SKAS),y) - ifneq ($(CONFIG_MODE_TT),y) - START := 0x8048000 - endif -endif +START := 0x8048000 LDFLAGS += -m elf_i386 ELF_ARCH := $(SUBARCH) diff --git a/arch/um/defconfig b/arch/um/defconfig index 1e0f677c2f4..ed3196d8c90 100644 --- a/arch/um/defconfig +++ b/arch/um/defconfig @@ -12,9 +12,7 @@ CONFIG_IRQ_RELEASE_METHOD=y # # UML-specific options # -# CONFIG_MODE_TT is not set # CONFIG_STATIC_LINK is not set -CONFIG_MODE_SKAS=y # # Host processor type and features diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index d8709050740..4d563b9dde5 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -735,8 +735,6 @@ void mconsole_sysrq(struct mc_request *req) } #endif -#ifdef CONFIG_MODE_SKAS - static void stack_proc(void *arg) { struct task_struct *from = current, *to = arg; @@ -750,7 +748,7 @@ static void stack_proc(void *arg) * Dumps a stacks registers to the linux console. * Usage stack <pid>. */ -static void do_stack_trace(struct mc_request *req) +void mconsole_stack(struct mc_request *req) { char *ptr = req->request.data; int pid_requested= -1; @@ -781,17 +779,6 @@ static void do_stack_trace(struct mc_request *req) } with_console(req, stack_proc, to); } -#endif /* CONFIG_MODE_SKAS */ - -void mconsole_stack(struct mc_request *req) -{ - /* This command doesn't work in TT mode, so let's check and then - * get out of here - */ - CHOOSE_MODE(mconsole_reply(req, "Sorry, this doesn't work in TT mode", - 1, 0), - do_stack_trace(req)); -} /* Changed by mconsole_setup, which is __setup, and called before SMP is * active. diff --git a/arch/um/include/as-layout.h b/arch/um/include/as-layout.h index fccf187bf4e..e44f32940f8 100644 --- a/arch/um/include/as-layout.h +++ b/arch/um/include/as-layout.h @@ -28,7 +28,6 @@ extern unsigned long _unprotected_end; extern unsigned long brk_start; extern int linux_main(int argc, char **argv); -extern void set_cmdline(char *cmd); extern void (*sig_info[])(int, union uml_pt_regs *); diff --git a/arch/um/include/choose-mode.h b/arch/um/include/choose-mode.h index b87b36a87d9..51a387626da 100644 --- a/arch/um/include/choose-mode.h +++ b/arch/um/include/choose-mode.h @@ -8,26 +8,8 @@ #include "uml-config.h" -#if defined(UML_CONFIG_MODE_TT) && defined(UML_CONFIG_MODE_SKAS) -#define CHOOSE_MODE(tt, skas) (mode_tt ? (tt) : (skas)) - -extern int mode_tt; -static inline void *__choose_mode(void *tt, void *skas) { - return mode_tt ? tt : skas; -} - -#define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas)))) - -#elif defined(UML_CONFIG_MODE_SKAS) #define CHOOSE_MODE(tt, skas) (skas) -#elif defined(UML_CONFIG_MODE_TT) -#define CHOOSE_MODE(tt, skas) (tt) - -#else -#error CONFIG_MODE_SKAS and CONFIG_MODE_TT are both disabled -#endif - #define CHOOSE_MODE_PROC(tt, skas, args...) \ CHOOSE_MODE(tt(args), skas(args)) diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h index 2378ff42e41..439b91f141a 100644 --- a/arch/um/include/common-offsets.h +++ b/arch/um/include/common-offsets.h @@ -1,9 +1,6 @@ /* for use by sys-$SUBARCH/kernel-offsets.c */ DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE); -#ifdef CONFIG_MODE_TT -OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid); -#endif OFFSET(HOST_TASK_REGS, task_struct, thread.regs); OFFSET(HOST_TASK_PID, task_struct, pid); diff --git a/arch/um/include/irq_user.h b/arch/um/include/irq_user.h index 15d311b9be9..741cb7d6f85 100644 --- a/arch/um/include/irq_user.h +++ b/arch/um/include/irq_user.h @@ -30,8 +30,4 @@ extern void deactivate_fd(int fd, int irqnum); extern int deactivate_all_fds(void); extern int activate_ipi(int fd, int pid); -#ifdef CONFIG_MODE_TT -extern void forward_interrupts(int pid); -#endif - #endif diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h index b84b5dadb95..578156db303 100644 --- a/arch/um/include/kern_util.h +++ b/arch/um/include/kern_util.h @@ -34,9 +34,6 @@ extern int nsyscalls; UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1) extern int kernel_fork(unsigned long flags, int (*fn)(void *), void * arg); -#ifdef UML_CONFIG_MODE_TT -extern unsigned long stack_sp(unsigned long page); -#endif extern int kernel_thread_proc(void *data); extern void syscall_segv(int sig); extern int current_pid(void); @@ -82,9 +79,6 @@ extern void check_stack_overflow(void *ptr); extern void relay_signal(int sig, union uml_pt_regs *regs); extern int user_context(unsigned long sp); extern void timer_irq(union uml_pt_regs *regs); -#ifdef CONFIG_MODE_TT -extern void unprotect_stack(unsigned long stack); -#endif extern void do_uml_exitcalls(void); extern int attach_debugger(int idle_pid, int pid, int stop); extern int config_gdb(char *str); diff --git a/arch/um/include/mode.h b/arch/um/include/mode.h index 786cf563eb0..fcce95cbc16 100644 --- a/arch/um/include/mode.h +++ b/arch/um/include/mode.h @@ -6,25 +6,6 @@ #ifndef __MODE_H__ #define __MODE_H__ -#include "uml-config.h" - -#ifdef UML_CONFIG_MODE_TT -#include "mode-tt.h" -#endif - -#ifdef UML_CONFIG_MODE_SKAS #include "mode-skas.h" -#endif #endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/include/mode_kern.h b/arch/um/include/mode_kern.h index 88e5e77bf51..b2a44c0dcd0 100644 --- a/arch/um/include/mode_kern.h +++ b/arch/um/include/mode_kern.h @@ -6,12 +6,6 @@ #ifndef __MODE_KERN_H__ #define __MODE_KERN_H__ -#ifdef CONFIG_MODE_TT -#include "mode_kern_tt.h" -#endif - -#ifdef CONFIG_MODE_SKAS #include "mode_kern_skas.h" -#endif #endif diff --git a/arch/um/include/os.h b/arch/um/include/os.h index c0803e67fc6..208d9b91fc9 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -178,11 +178,7 @@ extern void check_host_supports_tls(int *supports_tls, int *tls_min); /* Make sure they are clear when running in TT mode. Required by * SEGV_MAYBE_FIXABLE */ -#ifdef UML_CONFIG_MODE_SKAS #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0) -#else -#define clear_can_do_skas() do {} while (0) -#endif /* mem.c */ extern int create_mem_file(unsigned long long len); @@ -193,18 +189,11 @@ extern int os_process_parent(int pid); extern void os_stop_process(int pid); extern void os_kill_process(int pid, int reap_child); extern void os_kill_ptraced_process(int pid, int reap_child); -#ifdef UML_CONFIG_MODE_TT -extern void os_usr1_process(int pid); -#endif extern long os_ptrace_ldt(long pid, long addr, long data); extern int os_getpid(void); extern int os_getpgrp(void); -#ifdef UML_CONFIG_MODE_TT -extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)); -extern void stop(void); -#endif extern void init_new_thread_signals(void); extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr); @@ -217,18 +206,6 @@ extern int os_drop_memory(void *addr, int length); extern int can_drop_memory(void); extern void os_flush_stdout(void); -/* tt.c - * for tt mode only (will be deleted in future...) - */ -extern void forward_ipi(int fd, int pid); -extern void kill_child_dead(int pid); -extern int wait_for_stop(int pid, int sig, int cont_type, void *relay); -extern int protect_memory(unsigned long addr, unsigned long len, - int r, int w, int x, int must_succeed); -extern void forward_pending_sigio(int target); -extern int start_fork_tramp(void *arg, unsigned long temp_stack, - int clone_flags, int (*tramp)(void *)); - /* uaccess.c */ extern unsigned long __do_user_copy(void *to, const void *from, int n, void **fault_addr, void **fault_catcher, @@ -281,9 +258,6 @@ extern void os_dump_core(void); extern void switch_timers(int to_real); extern void idle_sleep(int secs); extern int set_interval(int is_virtual); -#ifdef CONFIG_MODE_TT -extern void enable_timer(void); -#endif extern void disable_timer(void); extern void uml_idle_timer(void); extern unsigned long long os_nsecs(void); diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h index b45a72feb08..c0ea4dbd042 100644 --- a/arch/um/include/sysdep-i386/ptrace.h +++ b/arch/um/include/sysdep-i386/ptrace.h @@ -14,12 +14,7 @@ #define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long)) #define MAX_REG_OFFSET (UM_FRAME_SIZE) -#ifdef UML_CONFIG_PT_PROXY -extern void update_debugregs(int seq); -#else static inline void update_debugregs(int seq) {} -#endif - /* syscall emulation path in ptrace */ @@ -31,12 +26,6 @@ void set_using_sysemu(int value); int get_using_sysemu(void); extern int sysemu_supported; -#ifdef UML_CONFIG_MODE_TT -#include "sysdep/sc.h" -#endif - -#ifdef UML_CONFIG_MODE_SKAS - #include "skas_ptregs.h" #define REGS_IP(r) ((r)[HOST_IP]) @@ -60,20 +49,11 @@ extern int sysemu_supported; #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r)) -#endif #ifndef PTRACE_SYSEMU_SINGLESTEP #define PTRACE_SYSEMU_SINGLESTEP 32 #endif union uml_pt_regs { -#ifdef UML_CONFIG_MODE_TT - struct tt_regs { - long syscall; - void *sc; - struct faultinfo faultinfo; - } tt; -#endif -#ifdef UML_CONFIG_MODE_SKAS struct skas_regs { unsigned long regs[MAX_REG_NR]; unsigned long fp[HOST_FP_SIZE]; @@ -82,13 +62,10 @@ union uml_pt_regs { long syscall; int is_user; } skas; -#endif }; #define EMPTY_UML_PT_REGS { } -extern int mode_tt; - #define UPT_SC(r) ((r)->tt.sc) #define UPT_IP(r) \ __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs)) diff --git a/arch/um/include/sysdep-i386/sigcontext.h b/arch/um/include/sysdep-i386/sigcontext.h index 23fd2644d7e..8658634ca4f 100644 --- a/arch/um/include/sysdep-i386/sigcontext.h +++ b/arch/um/include/sysdep-i386/sigcontext.h @@ -30,11 +30,7 @@ #define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) /* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */ -#ifdef UML_CONFIG_MODE_SKAS #define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo) -#else -#define SEGV_MAYBE_FIXABLE(fi) 0 -#endif extern unsigned long *sc_sigmask(void *sc_ptr); extern int sc_get_fpregs(unsigned long buf, void *sc_ptr); diff --git a/arch/um/include/sysdep-i386/thread.h b/arch/um/include/sysdep-i386/thread.h index 243fed44d78..0cf7bf6e9e0 100644 --- a/arch/um/include/sysdep-i386/thread.h +++ b/arch/um/include/sysdep-i386/thread.h @@ -4,8 +4,5 @@ #include <kern_constants.h> #define TASK_DEBUGREGS(task) ((unsigned long *) &(((char *) (task))[HOST_TASK_DEBUGREGS])) -#ifdef UML_CONFIG_MODE_TT -#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID])) -#endif #endif diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h index 62403bd9966..ff525bda4c1 100644 --- a/arch/um/include/sysdep-x86_64/ptrace.h +++ b/arch/um/include/sysdep-x86_64/ptrace.h @@ -1,5 +1,6 @@ /* * Copyright 2003 PathScale, Inc. + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * * Licensed under the GPL */ @@ -14,11 +15,6 @@ #define MAX_REG_OFFSET (UM_FRAME_SIZE) #define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long)) -#ifdef UML_CONFIG_MODE_TT -#include "sysdep/sc.h" -#endif - -#ifdef UML_CONFIG_MODE_SKAS #include "skas_ptregs.h" #define REGS_IP(r) ((r)[HOST_IP]) @@ -88,21 +84,10 @@ #define REGS_ERR(r) ((r)->fault_type) -#endif - #include "choose-mode.h" /* XXX */ union uml_pt_regs { -#ifdef UML_CONFIG_MODE_TT - struct tt_regs { - long syscall; - unsigned long orig_rax; - void *sc; - struct faultinfo faultinfo; - } tt; -#endif -#ifdef UML_CONFIG_MODE_SKAS struct skas_regs { unsigned long regs[MAX_REG_NR]; unsigned long fp[HOST_FP_SIZE]; @@ -110,14 +95,10 @@ union uml_pt_regs { long syscall; int is_user; } skas; -#endif }; #define EMPTY_UML_PT_REGS { } -/* XXX */ -extern int mode_tt; - #define UPT_RBX(r) __CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs)) #define UPT_RCX(r) __CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs)) #define UPT_RDX(r) __CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs)) diff --git a/arch/um/include/sysdep-x86_64/thread.h b/arch/um/include/sysdep-x86_64/thread.h index cbef3e1697f..d73d0b0afdb 100644 --- a/arch/um/include/sysdep-x86_64/thread.h +++ b/arch/um/include/sysdep-x86_64/thread.h @@ -3,8 +3,4 @@ #include <kern_constants.h> -#ifdef UML_CONFIG_MODE_TT -#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID])) -#endif - #endif diff --git a/arch/um/include/tt/debug.h b/arch/um/include/tt/debug.h deleted file mode 100644 index 9778fa83829..00000000000 --- a/arch/um/include/tt/debug.h +++ /dev/null @@ -1,18 +0,0 @@ -/* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) and - * Lars Brinkhoff. - * Licensed under the GPL - */ - -#ifndef __UML_TT_DEBUG_H -#define __UML_TT_DEBUG_H - -extern int debugger_proxy(int status, pid_t pid); -extern void child_proxy(pid_t pid, int status); -extern void init_proxy (pid_t pid, int waiting, int status); -extern int start_debugger(char *prog, int startup, int stop, int *debugger_fd); -extern void fake_child_exit(void); -extern int gdb_config(char *str); -extern int gdb_remove(int unused); - -#endif diff --git a/arch/um/include/tt/mmu-tt.h b/arch/um/include/tt/mmu-tt.h deleted file mode 100644 index 572a78b2258..00000000000 --- a/arch/um/include/tt/mmu-tt.h +++ /dev/null @@ -1,12 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __TT_MMU_H -#define __TT_MMU_H - -struct mmu_context_tt { -}; - -#endif diff --git a/arch/um/include/tt/mode-tt.h b/arch/um/include/tt/mode-tt.h deleted file mode 100644 index 2823cd56eea..00000000000 --- a/arch/um/include/tt/mode-tt.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __MODE_TT_H__ -#define __MODE_TT_H__ - -#include "sysdep/ptrace.h" - -enum { OP_NONE, OP_EXEC, OP_FORK, OP_TRACE_ON, OP_REBOOT, OP_HALT, OP_CB }; - -extern int tracing_pid; - -extern int tracer(int (*init_proc)(void *), void *sp); -extern void sig_handler_common_tt(int sig, void *sc); -extern void syscall_handler_tt(int sig, union uml_pt_regs *regs); -extern void reboot_tt(void); -extern void halt_tt(void); -extern int is_tracer_winch(int pid, int fd, void *data); -extern void kill_off_processes_tt(void); - -#endif diff --git a/arch/um/include/tt/mode_kern_tt.h b/arch/um/include/tt/mode_kern_tt.h deleted file mode 100644 index a4fc6305719..00000000000 --- a/arch/um/include/tt/mode_kern_tt.h +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __TT_MODE_KERN_H__ -#define __TT_MODE_KERN_H__ - -#include "linux/sched.h" -#include "asm/page.h" -#include "asm/ptrace.h" -#include "asm/uaccess.h" - -extern void switch_to_tt(void *prev, void *next); -extern void flush_thread_tt(void); -extern void start_thread_tt(struct pt_regs *regs, unsigned long eip, - unsigned long esp); -extern int copy_thread_tt(int nr, unsigned long clone_flags, unsigned long sp, - unsigned long stack_top, struct task_struct *p, - struct pt_regs *regs); -extern void release_thread_tt(struct task_struct *task); -extern void initial_thread_cb_tt(void (*proc)(void *), void *arg); -extern void init_idle_tt(void); -extern void flush_tlb_kernel_range_tt(unsigned long start, unsigned long end); -extern void flush_tlb_kernel_vm_tt(void); -extern void __flush_tlb_one_tt(unsigned long addr); -extern void flush_tlb_range_tt(struct vm_area_struct *vma, - unsigned long start, unsigned long end); -extern void flush_tlb_mm_tt(struct mm_struct *mm); -extern void force_flush_all_tt(void); -extern long execute_syscall_tt(void *r); -extern void before_mem_tt(unsigned long brk_start); -extern unsigned long set_task_sizes_tt(unsigned long *task_size_out); -extern int start_uml_tt(void); -extern int external_pid_tt(struct task_struct *task); -extern int thread_pid_tt(struct task_struct *task); - -#define kmem_end_tt (host_task_size - ABOVE_KMEM) - -#endif diff --git a/arch/um/include/tt/tt.h b/arch/um/include/tt/tt.h deleted file mode 100644 index acb8356e1f9..00000000000 --- a/arch/um/include/tt/tt.h +++ /dev/null @@ -1,37 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __TT_H__ -#define __TT_H__ - -#include "sysdep/ptrace.h" - -extern int gdb_pid; -extern int debug; -extern int debug_stop; -extern int debug_trace; - -extern int honeypot; - -extern int fork_tramp(void *sig_stack); -extern int do_proc_op(void *t, int proc_id); -extern int tracer(int (*init_proc)(void *), void *sp); -extern void attach_process(int pid); -extern void tracer_panic(char *format, ...) - __attribute__ ((format (printf, 1, 2))); -extern void set_init_pid(int pid); -extern int set_user_mode(void *task); -extern void set_tracing(void *t, int tracing); -extern int is_tracing(void *task); -extern void syscall_handler(int sig, union uml_pt_regs *regs); -extern void exit_kernel(int pid, void *task); -extern void do_syscall(void *task, int pid, int local_using_sysemu); -extern void do_sigtrap(void *task); -extern int is_valid_pid(int pid); -extern void remap_data(void *segment_start, void *segment_end, int w); -extern long execute_syscall_tt(void *r); - -#endif - diff --git a/arch/um/include/tt/uaccess-tt.h b/arch/um/include/tt/uaccess-tt.h deleted file mode 100644 index 13a64f61fcf..00000000000 --- a/arch/um/include/tt/uaccess-tt.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) - * Licensed under the GPL - */ - -#ifndef __TT_UACCESS_H -#define __TT_UACCESS_H - -#include "linux/string.h" -#include "linux/sched.h" -#include "asm/processor.h" -#include "asm/errno.h" -#include "asm/current.h" -#include "asm/a.out.h" -#include "uml_uaccess.h" - -#define ABOVE_KMEM (16 * 1024 * 1024) - -extern unsigned long end_vm; -extern unsigned long uml_physmem; - -#define is_stack(addr, size) \ - (((unsigned long) (addr) < STACK_TOP) && \ - ((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \ - (((unsigned long) (addr) + (size)) <= STACK_TOP)) - -#define access_ok_tt(type, addr, size) \ - (is_stack(addr, size)) - -extern int __do_copy_from_user(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher); -extern int __do_strncpy_from_user(char *dst, const char *src, size_t n, - void **fault_addr, void **fault_catcher); -extern int __do_clear_user(void *mem, size_t len, void **fault_addr, - void **fault_catcher); -extern int __do_strnlen_user(const char *str, unsigned long n, - void **fault_addr, void **fault_catcher); - -extern int copy_from_user_tt(void *to, const void __user *from, int n); -extern int copy_to_user_tt(void __user *to, const void *from, int n); -extern int strncpy_from_user_tt(char *dst, const char __user *src, int count); -extern int __clear_user_tt(void __user *mem, int len); -extern int clear_user_tt(void __user *mem, int len); -extern int strnlen_user_tt(const void __user *str, int len); - -#endif diff --git a/arch/um/include/um_mmu.h b/arch/um/include/um_mmu.h index 0fa64323830..2461be6b0a6 100644 --- a/arch/um/include/um_mmu.h +++ b/arch/um/include/um_mmu.h @@ -8,33 +8,10 @@ #include "uml-config.h" #include "choose-mode.h" - -#ifdef UML_CONFIG_MODE_TT -#include "mmu-tt.h" -#endif - -#ifdef UML_CONFIG_MODE_SKAS #include "mmu-skas.h" -#endif typedef union mm_context { -#ifdef UML_CONFIG_MODE_TT - struct mmu_context_tt tt; -#endif -#ifdef UML_CONFIG_MODE_SKAS struct mmu_context_skas skas; -#endif } mm_context_t; #endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h index 5126a99b596..6757ee768cc 100644 --- a/arch/um/include/um_uaccess.h +++ b/arch/um/include/um_uaccess.h @@ -7,15 +7,7 @@ #define __ARCH_UM_UACCESS_H #include "choose-mode.h" - -#ifdef CONFIG_MODE_TT -#include "uaccess-tt.h" -#endif - -#ifdef CONFIG_MODE_SKAS #include "uaccess-skas.h" -#endif - #include "asm/fixmap.h" #define __under_task_size(addr, size) \ diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index c5cf4a0827b..6651937a2d2 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -9,15 +9,12 @@ clean-files := obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \ physmem.o process.o ptrace.o reboot.o sigio.o \ signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o uaccess.o \ - um_arch.o umid.o + um_arch.o umid.o skas/ obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o obj-$(CONFIG_GPROF) += gprof_syms.o obj-$(CONFIG_GCOV) += gmon_syms.o -obj-$(CONFIG_MODE_TT) += tt/ -obj-$(CONFIG_MODE_SKAS) += skas/ - USER_OBJS := config.o include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S index 41850906116..3866f4960f0 100644 --- a/arch/um/kernel/dyn.lds.S +++ b/arch/um/kernel/dyn.lds.S @@ -10,8 +10,6 @@ SECTIONS PROVIDE (__executable_start = START); . = START + SIZEOF_HEADERS; .interp : { *(.interp) } - /* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start - * is remapped.*/ __binary_start = .; . = ALIGN(4096); /* Init code and data */ _text = .; diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c index ce6828fd396..84d77a0d138 100644 --- a/arch/um/kernel/exec.c +++ b/arch/um/kernel/exec.c @@ -57,7 +57,6 @@ static long execve1(char *file, char __user * __user *argv, SUBARCH_EXECVE1(¤t->thread.regs.regs); #endif task_unlock(current); - set_cmdline(current_cmd()); } return(error); } diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c index fa90db964b2..33055082356 100644 --- a/arch/um/kernel/init_task.c +++ b/arch/um/kernel/init_task.c @@ -46,10 +46,3 @@ union thread_union init_thread_union union thread_union cpu0_irqstack __attribute__((__section__(".data.init_irqstack"))) = { INIT_THREAD_INFO(init_task) }; - -#ifdef CONFIG_MODE_TT -void unprotect_stack(unsigned long stack) -{ - os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0); -} -#endif diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index cf0dd9cf8c4..ec1ed680032 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -339,30 +339,6 @@ int deactivate_all_fds(void) return 0; } -#ifdef CONFIG_MODE_TT -void forward_interrupts(int pid) -{ - struct irq_fd *irq; - unsigned long flags; - int err; - - spin_lock_irqsave(&irq_lock, flags); - for (irq = active_fds; irq != NULL; irq = irq->next) { - err = os_set_owner(irq->fd, pid); - if (err < 0) { - /* XXX Just remove the irq rather than - * print out an infinite stream of these - */ - printk("Failed to forward %d to pid %d, err = %d\n", - irq->fd, pid, -err); - } - - irq->pid = pid; - } - spin_unlock_irqrestore(&irq_lock, flags); -} -#endif - /* * do_IRQ handles all normal device IRQ's (the special * SMP cross-CPU interrupts have their own specific diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c index 7b3e53fb807..59e22d27b23 100644 --- a/arch/um/kernel/ksyms.c +++ b/arch/um/kernel/ksyms.c @@ -34,24 +34,14 @@ EXPORT_SYMBOL(get_kmem_end); EXPORT_SYMBOL(high_physmem); EXPORT_SYMBOL(empty_zero_page); EXPORT_SYMBOL(um_virt_to_phys); -EXPORT_SYMBOL(mode_tt); EXPORT_SYMBOL(handle_page_fault); EXPORT_SYMBOL(find_iomem); -#ifdef CONFIG_MODE_TT -EXPORT_SYMBOL(stop); -EXPORT_SYMBOL(strncpy_from_user_tt); -EXPORT_SYMBOL(copy_from_user_tt); -EXPORT_SYMBOL(copy_to_user_tt); -#endif - -#ifdef CONFIG_MODE_SKAS EXPORT_SYMBOL(strnlen_user_skas); EXPORT_SYMBOL(strncpy_from_user_skas); EXPORT_SYMBOL(copy_to_user_skas); EXPORT_SYMBOL(copy_from_user_skas); EXPORT_SYMBOL(clear_user_skas); -#endif EXPORT_SYMBOL(uml_strdup); EXPORT_SYMBOL(os_stat_fd); diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index f083787410a..005ed44d4a8 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -183,13 +183,6 @@ void initial_thread_cb(void (*proc)(void *), void *arg) kmalloc_ok = save_kmalloc_ok; } -#ifdef CONFIG_MODE_TT -unsigned long stack_sp(unsigned long page) -{ - return page + PAGE_SIZE - sizeof(void *); -} -#endif - void default_idle(void) { CHOOSE_MODE(uml_idle_timer(), (void) 0); diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c index 7e4305a1fd3..93df0672d02 100644 --- a/arch/um/kernel/reboot.c +++ b/arch/um/kernel/reboot.c @@ -14,28 +14,9 @@ void (*pm_power_off)(void); -#ifdef CONFIG_SMP -static void kill_idlers(int me) -{ -#ifdef CONFIG_MODE_TT - struct task_struct *p; - int i; - - for(i = 0; i < ARRAY_SIZE(idle_threads); i++){ - p = idle_threads[i]; - if((p != NULL) && (p->thread.mode.tt.extern_pid != me)) - os_kill_process(p->thread.mode.tt.extern_pid, 0); - } -#endif -} -#endif - static void kill_off_processes(void) { CHOOSE_MODE(kill_off_processes_tt(), kill_off_processes_skas()); -#ifdef CONFIG_SMP - kill_idlers(os_getpid()); -#endif } void uml_cleanup(void) diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c index e6a7778006a..15bb5436577 100644 --- a/arch/um/kernel/smp.c +++ b/arch/um/kernel/smp.c @@ -95,7 +95,6 @@ static int idle_proc(void *cpup) static struct task_struct *idle_thread(int cpu) { struct task_struct *new_task; - unsigned char c; current->thread.request.u.thread.proc = idle_proc; current->thread.request.u.thread.arg = (void *) cpu; @@ -108,9 +107,7 @@ static struct task_struct *idle_thread(int cpu) { .pid = new_task->thread.mode.tt.extern_pid, .task = new_task } ); idle_threads[cpu] = new_task; - CHOOSE_MODE(os_write_file(new_task->thread.mode.tt.switch_pipe[1], &c, - sizeof(c)), - ({ panic("skas mode doesn't support SMP"); })); + panic("skas mode doesn't support SMP"); return new_task; } diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 3850d53f79f..c517c449d0d 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -29,9 +29,7 @@ #include "sysdep/sigcontext.h" #include "sysdep/ptrace.h" #include "os.h" -#ifdef CONFIG_MODE_SKAS #include "skas.h" -#endif #include "os.h" /* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */ diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile deleted file mode 100644 index 6939e5af847..00000000000 --- a/arch/um/kernel/tt/Makefile +++ /dev/null @@ -1,14 +0,0 @@ -# -# Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com) -# Licensed under the GPL -# - -obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \ - syscall_kern.o syscall_user.o tlb.o tracer.o trap_user.o \ - uaccess.o uaccess_user.o - -obj-$(CONFIG_PT_PROXY) += gdb_kern.o ptproxy/ - -USER_OBJS := gdb.o tracer.o - -include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c deleted file mode 100644 index 40126cb5180..00000000000 --- a/arch/um/kernel/tt/exec_kern.c +++ /dev/null @@ -1,84 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/kernel.h" -#include "linux/mm.h" -#include "asm/signal.h" -#include "asm/ptrace.h" -#include "asm/uaccess.h" -#include "asm/pgalloc.h" -#include "asm/tlbflush.h" -#include "kern_util.h" -#include "irq_user.h" -#include "mem_user.h" -#include "os.h" -#include "tlb.h" -#include "mode.h" - -static int exec_tramp(void *sig_stack) -{ - init_new_thread_stack(sig_stack, NULL); - init_new_thread_signals(); - os_stop_process(os_getpid()); - return(0); -} - -void flush_thread_tt(void) -{ - unsigned long stack; - int new_pid; - - stack = alloc_stack(0, 0); - if(stack == 0){ - printk(KERN_ERR - "flush_thread : failed to allocate temporary stack\n"); - do_exit(SIGKILL); - } - - new_pid = start_fork_tramp(task_stack_page(current), stack, 0, exec_tramp); - if(new_pid < 0){ - printk(KERN_ERR - "flush_thread : new thread failed, errno = %d\n", - -new_pid); - do_exit(SIGKILL); - } - - if(current_thread->cpu == 0) - forward_interrupts(new_pid); - current->thread.request.op = OP_EXEC; - current->thread.request.u.exec.pid = new_pid; - unprotect_stack((unsigned long) current_thread); - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); - - change_sig(SIGUSR1, 0); - enable_timer(); - free_page(stack); - protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1); - stack_protections((unsigned long) current_thread); - force_flush_all(); - unblock_signals(); -} - -void start_thread_tt(struct pt_regs *regs, unsigned long eip, - unsigned long esp) -{ - set_fs(USER_DS); - flush_tlb_mm(current->mm); - PT_REGS_IP(regs) = eip; - PT_REGS_SP(regs) = esp; - PT_FIX_EXEC_STACK(esp); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/exec_user.c b/arch/um/kernel/tt/exec_user.c deleted file mode 100644 index 7b5f2181cf5..00000000000 --- a/arch/um/kernel/tt/exec_user.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdio.h> -#include <unistd.h> -#include <stdlib.h> -#include <sched.h> -#include <errno.h> -#include <sys/wait.h> -#include <signal.h> -#include "kern_util.h" -#include "user.h" -#include "ptrace_user.h" -#include "os.h" - -void do_exec(int old_pid, int new_pid) -{ - unsigned long regs[FRAME_SIZE]; - int err; - - if((ptrace(PTRACE_ATTACH, new_pid, 0, 0) < 0) || - (ptrace(PTRACE_CONT, new_pid, 0, 0) < 0)) - tracer_panic("do_exec failed to attach proc - errno = %d", - errno); - - CATCH_EINTR(err = waitpid(new_pid, 0, WUNTRACED)); - if (err < 0) - tracer_panic("do_exec failed to attach proc in waitpid - errno = %d", - errno); - - if(ptrace_getregs(old_pid, regs) < 0) - tracer_panic("do_exec failed to get registers - errno = %d", - errno); - - os_kill_ptraced_process(old_pid, 0); - - if (ptrace(PTRACE_OLDSETOPTIONS, new_pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0) - tracer_panic("do_exec: PTRACE_SETOPTIONS failed, errno = %d", errno); - - if(ptrace_setregs(new_pid, regs) < 0) - tracer_panic("do_exec failed to start new proc - errno = %d", - errno); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/gdb.c b/arch/um/kernel/tt/gdb.c deleted file mode 100644 index 030e4658f36..00000000000 --- a/arch/um/kernel/tt/gdb.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> -#include <string.h> -#include <signal.h> -#include <sys/types.h> -#include "ptrace_user.h" -#include "uml-config.h" -#include "kern_constants.h" -#include "chan_user.h" -#include "init.h" -#include "user.h" -#include "debug.h" -#include "kern_util.h" -#include "tt.h" -#include "sysdep/thread.h" -#include "os.h" - -extern int debugger_pid; -extern int debugger_fd; -extern int debugger_parent; - -int detach(int pid, int sig) -{ - return(ptrace(PTRACE_DETACH, pid, 0, sig)); -} - -int attach(int pid) -{ - int err; - - err = ptrace(PTRACE_ATTACH, pid, 0, 0); - if(err < 0) return(-errno); - else return(err); -} - -int cont(int pid) -{ - return(ptrace(PTRACE_CONT, pid, 0, 0)); -} - -#ifdef UML_CONFIG_PT_PROXY - -int debugger_signal(int status, pid_t pid) -{ - return(debugger_proxy(status, pid)); -} - -void child_signal(pid_t pid, int status) -{ - child_proxy(pid, status); -} - -static void gdb_announce(char *dev_name, int dev) -{ - printf("gdb assigned device '%s'\n", dev_name); -} - -static struct chan_opts opts = { - .announce = gdb_announce, - .xterm_title = "UML kernel debugger", - .raw = 0, - .tramp_stack = 0, - .in_kernel = 0, -}; - -/* Accessed by the tracing thread, which automatically serializes access */ -static void *xterm_data; -static int xterm_fd; - -extern void *xterm_init(char *, int, struct chan_opts *); -extern int xterm_open(int, int, int, void *, char **); -extern void xterm_close(int, void *); - -int open_gdb_chan(void) -{ - char stack[UM_KERN_PAGE_SIZE], *dummy; - - opts.tramp_stack = (unsigned long) stack; - xterm_data = xterm_init("", 0, &opts); - xterm_fd = xterm_open(1, 1, 1, xterm_data, &dummy); - return(xterm_fd); -} - -static void exit_debugger_cb(void *unused) -{ - if(debugger_pid != -1){ - if(gdb_pid != -1){ - fake_child_exit(); - gdb_pid = -1; - } - else kill_child_dead(debugger_pid); - debugger_pid = -1; - if(debugger_parent != -1) - detach(debugger_parent, SIGINT); - } - if(xterm_data != NULL) xterm_close(xterm_fd, xterm_data); -} - -static void exit_debugger(void) -{ - initial_thread_cb(exit_debugger_cb, NULL); -} - -__uml_exitcall(exit_debugger); - -struct gdb_data { - char *str; - int err; -}; - -extern char *linux_prog; - -static void config_gdb_cb(void *arg) -{ - struct gdb_data *data = arg; - void *task; - int pid; - - data->err = -1; - if(debugger_pid != -1) exit_debugger_cb(NULL); - if(!strncmp(data->str, "pid,", strlen("pid,"))){ - data->str += strlen("pid,"); - pid = strtoul(data->str, NULL, 0); - task = cpu_tasks[0].task; - debugger_pid = attach_debugger(TASK_EXTERN_PID(task), pid, 0); - if(debugger_pid != -1){ - data->err = 0; - gdb_pid = pid; - } - return; - } - data->err = 0; - debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd); - init_proxy(debugger_pid, 0, 0); -} - -int gdb_config(char *str, char **error_out) -{ - struct gdb_data data; - - if(*str++ != '=') return(-1); - data.str = str; - initial_thread_cb(config_gdb_cb, &data); - return(data.err); -} - -void remove_gdb_cb(void *unused) -{ - exit_debugger_cb(NULL); -} - -int gdb_remove(int unused, char **error_out) -{ - initial_thread_cb(remove_gdb_cb, NULL); - return 0; -} - -void signal_usr1(int sig) -{ - if(debugger_pid != -1){ - printf("The debugger is already running\n"); - return; - } - debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd); - init_proxy(debugger_pid, 0, 0); -} - -int init_ptrace_proxy(int idle_pid, int startup, int stop) -{ - int pid, status; - - pid = start_debugger(linux_prog, startup, stop, &debugger_fd); - status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL); - if(pid < 0){ - cont(idle_pid); - return(-1); - } - init_proxy(pid, 1, status); - return(pid); -} - -int attach_debugger(int idle_pid, int pid, int stop) -{ - int status = 0, err; - - err = attach(pid); - if(err < 0){ - printf("Failed to attach pid %d, errno = %d\n", pid, -err); - return(-1); - } - if(stop) status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL); - init_proxy(pid, 1, status); - return(pid); -} - -#ifdef notdef /* Put this back in when it does something useful */ -static int __init uml_gdb_init_setup(char *line, int *add) -{ - gdb_init = uml_strdup(line); - return 0; -} - -__uml_setup("gdb=", uml_gdb_init_setup, -"gdb=<channel description>\n\n" -); -#endif - -static int __init uml_gdb_pid_setup(char *line, int *add) -{ - gdb_pid = strtoul(line, NULL, 0); - *add = 0; - return 0; -} - -__uml_setup("gdb-pid=", uml_gdb_pid_setup, -"gdb-pid=<pid>\n" -" gdb-pid is used to attach an external debugger to UML. This may be\n" -" an already-running gdb or a debugger-like process like strace.\n\n" -); - -#else - -int debugger_signal(int status, pid_t pid){ return(0); } -void child_signal(pid_t pid, int status){ } -int init_ptrace_proxy(int idle_pid, int startup, int stop) -{ - printf("debug requested when CONFIG_PT_PROXY is off\n"); - kill_child_dead(idle_pid); - exit(1); -} - -void signal_usr1(int sig) -{ - printf("debug requested when CONFIG_PT_PROXY is off\n"); -} - -int attach_debugger(int idle_pid, int pid, int stop) -{ - printf("attach_debugger called when CONFIG_PT_PROXY " - "is off\n"); - return(-1); -} - -int config_gdb(char *str) -{ - return(-1); -} - -int remove_gdb(void) -{ - return(-1); -} - -int init_parent_proxy(int pid) -{ - return(-1); -} - -void debugger_parent_signal(int status, int pid) -{ -} - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/gdb_kern.c b/arch/um/kernel/tt/gdb_kern.c deleted file mode 100644 index 03b06bc0077..00000000000 --- a/arch/um/kernel/tt/gdb_kern.c +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/init.h" -#include "mconsole_kern.h" - -#ifdef CONFIG_MCONSOLE - -extern int gdb_config(char *str, char **error_out); -extern int gdb_remove(int n, char **error_out); - -static struct mc_device gdb_mc = { - .list = INIT_LIST_HEAD(gdb_mc.list), - .name = "gdb", - .config = gdb_config, - .remove = gdb_remove, -}; - -int gdb_mc_init(void) -{ - mconsole_register_dev(&gdb_mc); - return(0); -} - -__initcall(gdb_mc_init); - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/include/mode-tt.h b/arch/um/kernel/tt/include/mode-tt.h deleted file mode 100644 index e171e15fead..00000000000 --- a/arch/um/kernel/tt/include/mode-tt.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __MODE_TT_H__ -#define __MODE_TT_H__ - -#include "sysdep/ptrace.h" - -enum { OP_NONE, OP_EXEC, OP_FORK, OP_TRACE_ON, OP_REBOOT, OP_HALT, OP_CB }; - -extern int tracing_pid; - -extern int tracer(int (*init_proc)(void *), void *sp); -extern void sig_handler_common_tt(int sig, void *sc); -extern void syscall_handler_tt(int sig, union uml_pt_regs *regs); -extern void reboot_tt(void); -extern void halt_tt(void); -extern int is_tracer_winch(int pid, int fd, void *data); -extern void kill_off_processes_tt(void); - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ksyms.c b/arch/um/kernel/tt/ksyms.c deleted file mode 100644 index 84a9385a8fe..00000000000 --- a/arch/um/kernel/tt/ksyms.c +++ /dev/null @@ -1,29 +0,0 @@ -/* - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/module.h" -#include "asm/uaccess.h" -#include "mode.h" - -EXPORT_SYMBOL(__do_copy_from_user); -EXPORT_SYMBOL(__do_copy_to_user); -EXPORT_SYMBOL(__do_strncpy_from_user); -EXPORT_SYMBOL(__do_strnlen_user); -EXPORT_SYMBOL(__do_clear_user); -EXPORT_SYMBOL(clear_user_tt); - -EXPORT_SYMBOL(tracing_pid); -EXPORT_SYMBOL(honeypot); - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/mem.c b/arch/um/kernel/tt/mem.c deleted file mode 100644 index d0c3c4975f2..00000000000 --- a/arch/um/kernel/tt/mem.c +++ /dev/null @@ -1,34 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/stddef.h" -#include "linux/mm.h" -#include "asm/uaccess.h" -#include "mem_user.h" -#include "kern_util.h" -#include "kern.h" -#include "tt.h" - -void before_mem_tt(unsigned long brk_start) -{ - if(debug) - remap_data(UML_ROUND_DOWN(&_stext), UML_ROUND_UP(&_etext), 1); - remap_data(UML_ROUND_DOWN(&_sdata), UML_ROUND_UP(&_edata), 1); - remap_data(UML_ROUND_DOWN(&__bss_start), UML_ROUND_UP(&_end), 1); -} - -#define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000) -#define START (CONFIG_TOP_ADDR - SIZE) - -unsigned long set_task_sizes_tt(unsigned long *task_size_out) -{ - unsigned long host_task_size; - - /* Round up to the nearest 4M */ - host_task_size = ROUND_4M((unsigned long) &host_task_size); - *task_size_out = START; - - return host_task_size; -} diff --git a/arch/um/kernel/tt/mem_user.c b/arch/um/kernel/tt/mem_user.c deleted file mode 100644 index 9774f6360c3..00000000000 --- a/arch/um/kernel/tt/mem_user.c +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdlib.h> -#include <stdio.h> -#include <unistd.h> -#include <string.h> -#include <errno.h> -#include <sys/mman.h> -#include "tt.h" -#include "mem_user.h" -#include "os.h" - -void remap_data(void *segment_start, void *segment_end, int w) -{ - void *addr; - unsigned long size; - int data, prot; - - if(w) prot = PROT_WRITE; - else prot = 0; - prot |= PROT_READ | PROT_EXEC; - size = (unsigned long) segment_end - - (unsigned long) segment_start; - data = create_mem_file(size); - addr = mmap(NULL, size, PROT_WRITE | PROT_READ, MAP_SHARED, data, 0); - if(addr == MAP_FAILED){ - perror("mapping new data segment"); - exit(1); - } - memcpy(addr, segment_start, size); - if(switcheroo(data, prot, addr, segment_start, size) < 0){ - printf("switcheroo failed\n"); - exit(1); - } -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c deleted file mode 100644 index 74347adf81b..00000000000 --- a/arch/um/kernel/tt/process_kern.c +++ /dev/null @@ -1,461 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include "linux/sched.h" -#include "linux/signal.h" -#include "linux/kernel.h" -#include "linux/interrupt.h" -#include "linux/ptrace.h" -#include "asm/system.h" -#include "asm/pgalloc.h" -#include "asm/ptrace.h" -#include "asm/tlbflush.h" -#include "irq_user.h" -#include "kern_util.h" -#include "os.h" -#include "kern.h" -#include "sigcontext.h" -#include "mem_user.h" -#include "tlb.h" -#include "mode.h" -#include "mode_kern.h" -#include "init.h" -#include "tt.h" - -void switch_to_tt(void *prev, void *next) -{ - struct task_struct *from, *to, *prev_sched; - unsigned long flags; - int err, vtalrm, alrm, prof, cpu; - char c; - - from = prev; - to = next; - - cpu = task_thread_info(from)->cpu; - if(cpu == 0) - forward_interrupts(to->thread.mode.tt.extern_pid); -#ifdef CONFIG_SMP - forward_ipi(cpu_data[cpu].ipi_pipe[0], to->thread.mode.tt.extern_pid); -#endif - local_irq_save(flags); - - vtalrm = change_sig(SIGVTALRM, 0); - alrm = change_sig(SIGALRM, 0); - prof = change_sig(SIGPROF, 0); - - forward_pending_sigio(to->thread.mode.tt.extern_pid); - - c = 0; - - /* Notice that here we "up" the semaphore on which "to" is waiting, and - * below (the read) we wait on this semaphore (which is implemented by - * switch_pipe) and go sleeping. Thus, after that, we have resumed in - * "to", and can't use any more the value of "from" (which is outdated), - * nor the value in "to" (since it was the task which stole us the CPU, - * which we don't care about). */ - - err = os_write_file(to->thread.mode.tt.switch_pipe[1], &c, sizeof(c)); - if(err != sizeof(c)) - panic("write of switch_pipe failed, err = %d", -err); - - if(from->thread.mode.tt.switch_pipe[0] == -1) - os_kill_process(os_getpid(), 0); - - err = os_read_file(from->thread.mode.tt.switch_pipe[0], &c, - sizeof(c)); - if(err != sizeof(c)) - panic("read of switch_pipe failed, errno = %d", -err); - - /* If the process that we have just scheduled away from has exited, - * then it needs to be killed here. The reason is that, even though - * it will kill itself when it next runs, that may be too late. Its - * stack will be freed, possibly before then, and if that happens, - * we have a use-after-free situation. So, it gets killed here - * in case it has not already killed itself. - */ - prev_sched = current->thread.prev_sched; - if(prev_sched->thread.mode.tt.switch_pipe[0] == -1) - os_kill_process(prev_sched->thread.mode.tt.extern_pid, 1); - - change_sig(SIGVTALRM, vtalrm); - change_sig(SIGALRM, alrm); - change_sig(SIGPROF, prof); - - arch_switch_to_tt(prev_sched, current); - - flush_tlb_all(); - local_irq_restore(flags); -} - -void release_thread_tt(struct task_struct *task) -{ - int pid = task->thread.mode.tt.extern_pid; - - /* - * We first have to kill the other process, before - * closing its switch_pipe. Else it might wake up - * and receive "EOF" before we could kill it. - */ - if(os_getpid() != pid) - os_kill_process(pid, 0); - - os_close_file(task->thread.mode.tt.switch_pipe[0]); - os_close_file(task->thread.mode.tt.switch_pipe[1]); - /* use switch_pipe as flag: thread is released */ - task->thread.mode.tt.switch_pipe[0] = -1; -} - -void suspend_new_thread(int fd) -{ - int err; - char c; - - os_stop_process(os_getpid()); - err = os_read_file(fd, &c, sizeof(c)); - if(err != sizeof(c)) - panic("read failed in suspend_new_thread, err = %d", -err); -} - -void schedule_tail(struct task_struct *prev); - -static void new_thread_handler(int sig) -{ - unsigned long disable; - int (*fn)(void *); - void *arg; - - fn = current->thread.request.u.thread.proc; - arg = current->thread.request.u.thread.arg; - - UPT_SC(¤t->thread.regs.regs) = (void *) (&sig + 1); - disable = (1 << (SIGVTALRM - 1)) | (1 << (SIGALRM - 1)) | - (1 << (SIGIO - 1)) | (1 << (SIGPROF - 1)); - SC_SIGMASK(UPT_SC(¤t->thread.regs.regs)) &= ~disable; - - suspend_new_thread(current->thread.mode.tt.switch_pipe[0]); - - force_flush_all(); - if(current->thread.prev_sched != NULL) - schedule_tail(current->thread.prev_sched); - current->thread.prev_sched = NULL; - - init_new_thread_signals(); - enable_timer(); - free_page(current->thread.temp_stack); - set_cmdline("(kernel thread)"); - - change_sig(SIGUSR1, 1); - change_sig(SIGPROF, 1); - local_irq_enable(); - if(!run_kernel_thread(fn, arg, ¤t->thread.exec_buf)) - do_exit(0); - - /* XXX No set_user_mode here because a newly execed process will - * immediately segfault on its non-existent IP, coming straight back - * to the signal handler, which will call set_user_mode on its way - * out. This should probably change since it's confusing. - */ -} - -static int new_thread_proc(void *stack) -{ - /* local_irq_disable is needed to block out signals until this thread is - * properly scheduled. Otherwise, the tracing thread will get mighty - * upset about any signals that arrive before that. - * This has the complication that it sets the saved signal mask in - * the sigcontext to block signals. This gets restored when this - * thread (or a descendant, since they get a copy of this sigcontext) - * returns to userspace. - * So, this is compensated for elsewhere. - * XXX There is still a small window until local_irq_disable() actually - * finishes where signals are possible - shouldn't be a problem in - * practice since SIGIO hasn't been forwarded here yet, and the - * local_irq_disable should finish before a SIGVTALRM has time to be - * delivered. - */ - - local_irq_disable(); - init_new_thread_stack(stack, new_thread_handler); - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); - return(0); -} - -/* Signal masking - signals are blocked at the start of fork_tramp. They - * are re-enabled when finish_fork_handler is entered by fork_tramp hitting - * itself with a SIGUSR1. set_user_mode has to be run with SIGUSR1 off, - * so it is blocked before it's called. They are re-enabled on sigreturn - * despite the fact that they were blocked when the SIGUSR1 was issued because - * copy_thread copies the parent's sigcontext, including the signal mask - * onto the signal frame. - */ - -void finish_fork_handler(int sig) -{ - UPT_SC(¤t->thread.regs.regs) = (void *) (&sig + 1); - suspend_new_thread(current->thread.mode.tt.switch_pipe[0]); - - force_flush_all(); - if(current->thread.prev_sched != NULL) - schedule_tail(current->thread.prev_sched); - current->thread.prev_sched = NULL; - - enable_timer(); - change_sig(SIGVTALRM, 1); - local_irq_enable(); - if(current->mm != current->parent->mm) - protect_memory(uml_reserved, high_physmem - uml_reserved, 1, - 1, 0, 1); - stack_protections((unsigned long) current_thread); - - free_page(current->thread.temp_stack); - local_irq_disable(); - change_sig(SIGUSR1, 0); - set_user_mode(current); -} - -int fork_tramp(void *stack) -{ - local_irq_disable(); - arch_init_thread(); - init_new_thread_stack(stack, finish_fork_handler); - - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); - return(0); -} - -int copy_thread_tt(int nr, unsigned long clone_flags, unsigned long sp, - unsigned long stack_top, struct task_struct * p, - struct pt_regs *regs) -{ - int (*tramp)(void *); - int new_pid, err; - unsigned long stack; - - if(current->thread.forking) - tramp = fork_tramp; - else { - tramp = new_thread_proc; - p->thread.request.u.thread = current->thread.request.u.thread; - } - - err = os_pipe(p->thread.mode.tt.switch_pipe, 1, 1); - if(err < 0){ - printk("copy_thread : pipe failed, err = %d\n", -err); - return(err); - } - - stack = alloc_stack(0, 0); - if(stack == 0){ - printk(KERN_ERR "copy_thread : failed to allocate " - "temporary stack\n"); - return(-ENOMEM); - } - - clone_flags &= CLONE_VM; - p->thread.temp_stack = stack; - new_pid = start_fork_tramp(task_stack_page(p), stack, clone_flags, tramp); - if(new_pid < 0){ - printk(KERN_ERR "copy_thread : clone failed - errno = %d\n", - -new_pid); - return(new_pid); - } - - if(current->thread.forking){ - sc_to_sc(UPT_SC(&p->thread.regs.regs), UPT_SC(®s->regs)); - SC_SET_SYSCALL_RETURN(UPT_SC(&p->thread.regs.regs), 0); - if(sp != 0) - SC_SP(UPT_SC(&p->thread.regs.regs)) = sp; - } - p->thread.mode.tt.extern_pid = new_pid; - - current->thread.request.op = OP_FORK; - current->thread.request.u.fork.pid = new_pid; - os_usr1_process(os_getpid()); - - /* Enable the signal and then disable it to ensure that it is handled - * here, and nowhere else. - */ - change_sig(SIGUSR1, 1); - - change_sig(SIGUSR1, 0); - err = 0; - return(err); -} - -void reboot_tt(void) -{ - current->thread.request.op = OP_REBOOT; - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); -} - -void halt_tt(void) -{ - current->thread.request.op = OP_HALT; - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); -} - -void kill_off_processes_tt(void) -{ - struct task_struct *p; - int me; - - me = os_getpid(); - for_each_process(p){ - if(p->thread.mode.tt.extern_pid != me) - os_kill_process(p->thread.mode.tt.extern_pid, 0); - } - if(init_task.thread.mode.tt.extern_pid != me) - os_kill_process(init_task.thread.mode.tt.extern_pid, 0); -} - -void initial_thread_cb_tt(void (*proc)(void *), void *arg) -{ - if(os_getpid() == tracing_pid){ - (*proc)(arg); - } - else { - current->thread.request.op = OP_CB; - current->thread.request.u.cb.proc = proc; - current->thread.request.u.cb.arg = arg; - os_usr1_process(os_getpid()); - change_sig(SIGUSR1, 1); - - change_sig(SIGUSR1, 0); - } -} - -int do_proc_op(void *t, int proc_id) -{ - struct task_struct *task; - struct thread_struct *thread; - int op, pid; - - task = t; - thread = &task->thread; - op = thread->request.op; - switch(op){ - case OP_NONE: - case OP_TRACE_ON: - break; - case OP_EXEC: - pid = thread->request.u.exec.pid; - do_exec(thread->mode.tt.extern_pid, pid); - thread->mode.tt.extern_pid = pid; - cpu_tasks[task_thread_info(task)->cpu].pid = pid; - break; - case OP_FORK: - attach_process(thread->request.u.fork.pid); - break; - case OP_CB: - (*thread->request.u.cb.proc)(thread->request.u.cb.arg); - break; - case OP_REBOOT: - case OP_HALT: - break; - default: - tracer_panic("Bad op in do_proc_op"); - break; - } - thread->request.op = OP_NONE; - return(op); -} - -void init_idle_tt(void) -{ - default_idle(); -} - -extern void start_kernel(void); - -static int start_kernel_proc(void *unused) -{ - int pid; - - block_signals(); - pid = os_getpid(); - - cpu_tasks[0].pid = pid; - cpu_tasks[0].task = current; -#ifdef CONFIG_SMP - cpu_online_map = cpumask_of_cpu(0); -#endif - if(debug) os_stop_process(pid); - start_kernel(); - return(0); -} - -void set_tracing(void *task, int tracing) -{ - ((struct task_struct *) task)->thread.mode.tt.tracing = tracing; -} - -int is_tracing(void *t) -{ - return (((struct task_struct *) t)->thread.mode.tt.tracing); -} - -int set_user_mode(void *t) -{ - struct task_struct *task; - - task = t ? t : current; - if(task->thread.mode.tt.tracing) - return(1); - task->thread.request.op = OP_TRACE_ON; - os_usr1_process(os_getpid()); - return(0); -} - -void set_init_pid(int pid) -{ - int err; - - init_task.thread.mode.tt.extern_pid = pid; - err = os_pipe(init_task.thread.mode.tt.switch_pipe, 1, 1); - if(err) - panic("Can't create switch pipe for init_task, errno = %d", - -err); -} - -int start_uml_tt(void) -{ - void *sp; - int pages; - - pages = (1 << CONFIG_KERNEL_STACK_ORDER); - sp = task_stack_page(&init_task) + - pages * PAGE_SIZE - sizeof(unsigned long); - return(tracer(start_kernel_proc, sp)); -} - -int external_pid_tt(struct task_struct *task) -{ - return(task->thread.mode.tt.extern_pid); -} - -int thread_pid_tt(struct task_struct *task) -{ - return(task->thread.mode.tt.extern_pid); -} - -int is_valid_pid(int pid) -{ - struct task_struct *task; - - read_lock(&tasklist_lock); - for_each_process(task){ - if(task->thread.mode.tt.extern_pid == pid){ - read_unlock(&tasklist_lock); - return(1); - } - } - read_unlock(&tasklist_lock); - return(0); -} diff --git a/arch/um/kernel/tt/ptproxy/Makefile b/arch/um/kernel/tt/ptproxy/Makefile deleted file mode 100644 index 3ad5b774de5..00000000000 --- a/arch/um/kernel/tt/ptproxy/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -# -# Copyright (C) 2002 Jeff Dike (jdike@karaya.com) -# Licensed under the GPL -# - -obj-y = proxy.o ptrace.o sysdep.o wait.o - -USER_OBJS := $(obj-y) - -include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/tt/ptproxy/proxy.c b/arch/um/kernel/tt/ptproxy/proxy.c deleted file mode 100644 index 420c23f311f..00000000000 --- a/arch/um/kernel/tt/ptproxy/proxy.c +++ /dev/null @@ -1,377 +0,0 @@ -/********************************************************************** -proxy.c - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. - -Jeff Dike (jdike@karaya.com) : Modified for integration into uml -**********************************************************************/ - -/* XXX This file shouldn't refer to CONFIG_* */ - -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <signal.h> -#include <string.h> -#include <termios.h> -#include <sys/wait.h> -#include <sys/types.h> -#include <sys/ioctl.h> -#include <asm/unistd.h> -#include "ptrace_user.h" - -#include "ptproxy.h" -#include "sysdep.h" -#include "wait.h" - -#include "user.h" -#include "os.h" -#include "tempfile.h" - -static int debugger_wait(debugger_state *debugger, int *status, int options, - int (*syscall)(debugger_state *debugger, pid_t child), - int (*normal_return)(debugger_state *debugger, - pid_t unused), - int (*wait_return)(debugger_state *debugger, - pid_t unused)) -{ - if(debugger->real_wait){ - debugger->handle_trace = normal_return; - syscall_continue(debugger->pid); - debugger->real_wait = 0; - return(1); - } - debugger->wait_status_ptr = status; - debugger->wait_options = options; - if((debugger->debugee != NULL) && debugger->debugee->event){ - syscall_continue(debugger->pid); - wait_for_stop(debugger->pid, SIGTRAP, PTRACE_SYSCALL, - NULL); - (*wait_return)(debugger, -1); - return(0); - } - else if(debugger->wait_options & WNOHANG){ - syscall_cancel(debugger->pid, 0); - debugger->handle_trace = syscall; - return(0); - } - else { - syscall_pause(debugger->pid); - debugger->handle_trace = wait_return; - debugger->waiting = 1; - } - return(1); -} - -/* - * Handle debugger trap, i.e. syscall. - */ - -int debugger_syscall(debugger_state *debugger, pid_t child) -{ - long arg1, arg2, arg3, arg4, arg5, result; - int syscall, ret = 0; - - syscall = get_syscall(debugger->pid, &arg1, &arg2, &arg3, &arg4, - &arg5); - - switch(syscall){ - case __NR_execve: - /* execve never returns */ - debugger->handle_trace = debugger_syscall; - break; - - case __NR_ptrace: - if(debugger->debugee->pid != 0) arg2 = debugger->debugee->pid; - if(!debugger->debugee->in_context) - child = debugger->debugee->pid; - result = proxy_ptrace(debugger, arg1, arg2, arg3, arg4, child, - &ret); - syscall_cancel(debugger->pid, result); - debugger->handle_trace = debugger_syscall; - return(ret); - -#ifdef __NR_waitpid - case __NR_waitpid: -#endif - case __NR_wait4: - if(!debugger_wait(debugger, (int *) arg2, arg3, - debugger_syscall, debugger_normal_return, - proxy_wait_return)) - return(0); - break; - - case __NR_kill: - if(!debugger->debugee->in_context) - child = debugger->debugee->pid; - if(arg1 == debugger->debugee->pid){ - result = kill(child, arg2); - syscall_cancel(debugger->pid, result); - debugger->handle_trace = debugger_syscall; - return(0); - } - else debugger->handle_trace = debugger_normal_return; - break; - - default: - debugger->handle_trace = debugger_normal_return; - } - - syscall_continue(debugger->pid); - return(0); -} - -/* Used by the tracing thread */ -static debugger_state parent; -static int parent_syscall(debugger_state *debugger, int pid); - -int init_parent_proxy(int pid) -{ - parent = ((debugger_state) { .pid = pid, - .wait_options = 0, - .wait_status_ptr = NULL, - .waiting = 0, - .real_wait = 0, - .expecting_child = 0, - .handle_trace = parent_syscall, - .debugee = NULL } ); - return(0); -} - -int parent_normal_return(debugger_state *debugger, pid_t unused) -{ - debugger->handle_trace = parent_syscall; - syscall_continue(debugger->pid); - return(0); -} - -static int parent_syscall(debugger_state *debugger, int pid) -{ - long arg1, arg2, arg3, arg4, arg5; - int syscall; - - syscall = get_syscall(pid, &arg1, &arg2, &arg3, &arg4, &arg5); - - if((syscall == __NR_wait4) -#ifdef __NR_waitpid - || (syscall == __NR_waitpid) -#endif - ){ - debugger_wait(&parent, (int *) arg2, arg3, parent_syscall, - parent_normal_return, parent_wait_return); - } - else ptrace(PTRACE_SYSCALL, pid, 0, 0); - return(0); -} - -int debugger_normal_return(debugger_state *debugger, pid_t unused) -{ - debugger->handle_trace = debugger_syscall; - syscall_continue(debugger->pid); - return(0); -} - -void debugger_cancelled_return(debugger_state *debugger, int result) -{ - debugger->handle_trace = debugger_syscall; - syscall_set_result(debugger->pid, result); - syscall_continue(debugger->pid); -} - -/* Used by the tracing thread */ -static debugger_state debugger; -static debugee_state debugee; - -void init_proxy (pid_t debugger_pid, int stopped, int status) -{ - debugger.pid = debugger_pid; - debugger.handle_trace = debugger_syscall; - debugger.debugee = &debugee; - debugger.waiting = 0; - debugger.real_wait = 0; - debugger.expecting_child = 0; - - debugee.pid = 0; - debugee.traced = 0; - debugee.stopped = stopped; - debugee.event = 0; - debugee.zombie = 0; - debugee.died = 0; - debugee.wait_status = status; - debugee.in_context = 1; -} - -int debugger_proxy(int status, int pid) -{ - int ret = 0, sig; - - if(WIFSTOPPED(status)){ - sig = WSTOPSIG(status); - if (sig == SIGTRAP) - ret = (*debugger.handle_trace)(&debugger, pid); - - else if(sig == SIGCHLD){ - if(debugger.expecting_child){ - ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig); - debugger.expecting_child = 0; - } - else if(debugger.waiting) - real_wait_return(&debugger); - else { - ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig); - debugger.real_wait = 1; - } - } - else ptrace(PTRACE_SYSCALL, debugger.pid, 0, sig); - } - else if(WIFEXITED(status)){ - tracer_panic("debugger (pid %d) exited with status %d", - debugger.pid, WEXITSTATUS(status)); - } - else if(WIFSIGNALED(status)){ - tracer_panic("debugger (pid %d) exited with signal %d", - debugger.pid, WTERMSIG(status)); - } - else { - tracer_panic("proxy got unknown status (0x%x) on debugger " - "(pid %d)", status, debugger.pid); - } - return(ret); -} - -void child_proxy(pid_t pid, int status) -{ - debugee.event = 1; - debugee.wait_status = status; - - if(WIFSTOPPED(status)){ - debugee.stopped = 1; - debugger.expecting_child = 1; - kill(debugger.pid, SIGCHLD); - } - else if(WIFEXITED(status) || WIFSIGNALED(status)){ - debugee.zombie = 1; - debugger.expecting_child = 1; - kill(debugger.pid, SIGCHLD); - } - else panic("proxy got unknown status (0x%x) on child (pid %d)", - status, pid); -} - -void debugger_parent_signal(int status, int pid) -{ - int sig; - - if(WIFSTOPPED(status)){ - sig = WSTOPSIG(status); - if(sig == SIGTRAP) (*parent.handle_trace)(&parent, pid); - else ptrace(PTRACE_SYSCALL, pid, 0, sig); - } -} - -void fake_child_exit(void) -{ - int status, pid; - - child_proxy(1, W_EXITCODE(0, 0)); - while(debugger.waiting == 1){ - CATCH_EINTR(pid = waitpid(debugger.pid, &status, WUNTRACED)); - if(pid != debugger.pid){ - printk("fake_child_exit - waitpid failed, " - "errno = %d\n", errno); - return; - } - debugger_proxy(status, debugger.pid); - } - CATCH_EINTR(pid = waitpid(debugger.pid, &status, WUNTRACED)); - if(pid != debugger.pid){ - printk("fake_child_exit - waitpid failed, " - "errno = %d\n", errno); - return; - } - if(ptrace(PTRACE_DETACH, debugger.pid, 0, SIGCONT) < 0) - printk("fake_child_exit - PTRACE_DETACH failed, errno = %d\n", - errno); -} - -char gdb_init_string[] = -"att 1 \n\ -b panic \n\ -b stop \n\ -handle SIGWINCH nostop noprint pass \n\ -"; - -int start_debugger(char *prog, int startup, int stop, int *fd_out) -{ - int slave, child; - - slave = open_gdb_chan(); - child = fork(); - if(child == 0){ - char *tempname = NULL; - int fd; - - if(setsid() < 0) perror("setsid"); - if((dup2(slave, 0) < 0) || (dup2(slave, 1) < 0) || - (dup2(slave, 2) < 0)){ - printk("start_debugger : dup2 failed, errno = %d\n", - errno); - exit(1); - } - if(ioctl(0, TIOCSCTTY, 0) < 0){ - printk("start_debugger : TIOCSCTTY failed, " - "errno = %d\n", errno); - exit(1); - } - if(tcsetpgrp (1, os_getpid()) < 0){ - printk("start_debugger : tcsetpgrp failed, " - "errno = %d\n", errno); -#ifdef notdef - exit(1); -#endif - } - fd = make_tempfile("/tmp/gdb_init-XXXXXX", &tempname, 0); - if(fd < 0){ - printk("start_debugger : make_tempfile failed," - "err = %d\n", -fd); - exit(1); - } - os_write_file(fd, gdb_init_string, - sizeof(gdb_init_string) - 1); - if(startup){ - if(stop){ - os_write_file(fd, "b start_kernel\n", - strlen("b start_kernel\n")); - } - os_write_file(fd, "c\n", strlen("c\n")); - } - if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){ - printk("start_debugger : PTRACE_TRACEME failed, " - "errno = %d\n", errno); - exit(1); - } - execlp("gdb", "gdb", "--command", tempname, prog, NULL); - printk("start_debugger : exec of gdb failed, errno = %d\n", - errno); - } - if(child < 0){ - printk("start_debugger : fork for gdb failed, errno = %d\n", - errno); - return(-1); - } - *fd_out = slave; - return(child); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/ptproxy.h b/arch/um/kernel/tt/ptproxy/ptproxy.h deleted file mode 100644 index 5eb0285b196..00000000000 --- a/arch/um/kernel/tt/ptproxy/ptproxy.h +++ /dev/null @@ -1,61 +0,0 @@ -/********************************************************************** -ptproxy.h - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. -**********************************************************************/ - -#ifndef __PTPROXY_H -#define __PTPROXY_H - -#include <sys/types.h> - -typedef struct debugger debugger_state; -typedef struct debugee debugee_state; - -struct debugger -{ - pid_t pid; - int wait_options; - int *wait_status_ptr; - unsigned int waiting : 1; - unsigned int real_wait : 1; - unsigned int expecting_child : 1; - int (*handle_trace) (debugger_state *, pid_t); - - debugee_state *debugee; -}; - -struct debugee -{ - pid_t pid; - int wait_status; - unsigned int died : 1; - unsigned int event : 1; - unsigned int stopped : 1; - unsigned int trace_singlestep : 1; - unsigned int trace_syscall : 1; - unsigned int traced : 1; - unsigned int zombie : 1; - unsigned int in_context : 1; -}; - -extern int debugger_syscall(debugger_state *debugger, pid_t pid); -extern int debugger_normal_return (debugger_state *debugger, pid_t unused); - -extern long proxy_ptrace (struct debugger *, int, pid_t, long, long, pid_t, - int *strace_out); -extern void debugger_cancelled_return(debugger_state *debugger, int result); - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/ptrace.c b/arch/um/kernel/tt/ptproxy/ptrace.c deleted file mode 100644 index 4b4f6179b21..00000000000 --- a/arch/um/kernel/tt/ptproxy/ptrace.c +++ /dev/null @@ -1,237 +0,0 @@ -/********************************************************************** -ptrace.c - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. - -Jeff Dike (jdike@karaya.com) : Modified for integration into uml -**********************************************************************/ - -#include <errno.h> -#include <unistd.h> -#include <signal.h> -#include <sys/types.h> -#include <sys/time.h> -#include <sys/wait.h> - -#include "ptproxy.h" -#include "debug.h" -#include "kern_util.h" -#include "ptrace_user.h" -#include "tt.h" -#include "os.h" - -long proxy_ptrace(struct debugger *debugger, int arg1, pid_t arg2, - long arg3, long arg4, pid_t child, int *ret) -{ - sigset_t relay; - long result; - int status; - - *ret = 0; - if(debugger->debugee->died) return(-ESRCH); - - switch(arg1){ - case PTRACE_ATTACH: - if(debugger->debugee->traced) return(-EPERM); - - debugger->debugee->pid = arg2; - debugger->debugee->traced = 1; - - if(is_valid_pid(arg2) && (arg2 != child)){ - debugger->debugee->in_context = 0; - kill(arg2, SIGSTOP); - debugger->debugee->event = 1; - debugger->debugee->wait_status = W_STOPCODE(SIGSTOP); - } - else { - debugger->debugee->in_context = 1; - if(debugger->debugee->stopped) - child_proxy(child, W_STOPCODE(SIGSTOP)); - else kill(child, SIGSTOP); - } - - return(0); - - case PTRACE_DETACH: - if(!debugger->debugee->traced) return(-EPERM); - - debugger->debugee->traced = 0; - debugger->debugee->pid = 0; - if(!debugger->debugee->in_context) - kill(child, SIGCONT); - - return(0); - - case PTRACE_CONT: - if(!debugger->debugee->in_context) return(-EPERM); - *ret = PTRACE_CONT; - return(ptrace(PTRACE_CONT, child, arg3, arg4)); - -#ifdef UM_HAVE_GETFPREGS - case PTRACE_GETFPREGS: - { - long regs[FP_FRAME_SIZE]; - int i, result; - - result = ptrace(PTRACE_GETFPREGS, child, 0, regs); - if(result == -1) return(-errno); - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - ptrace(PTRACE_POKEDATA, debugger->pid, arg4 + 4 * i, - regs[i]); - return(result); - } -#endif - -#ifdef UM_HAVE_GETFPXREGS - case PTRACE_GETFPXREGS: - { - long regs[FPX_FRAME_SIZE]; - int i, result; - - result = ptrace(PTRACE_GETFPXREGS, child, 0, regs); - if(result == -1) return(-errno); - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - ptrace(PTRACE_POKEDATA, debugger->pid, arg4 + 4 * i, - regs[i]); - return(result); - } -#endif - -#ifdef UM_HAVE_GETREGS - case PTRACE_GETREGS: - { - long regs[FRAME_SIZE]; - int i, result; - - result = ptrace(PTRACE_GETREGS, child, 0, regs); - if(result == -1) return(-errno); - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - ptrace (PTRACE_POKEDATA, debugger->pid, - arg4 + 4 * i, regs[i]); - return(result); - } - break; -#endif - - case PTRACE_KILL: - result = ptrace(PTRACE_KILL, child, arg3, arg4); - if(result == -1) return(-errno); - - return(result); - - case PTRACE_PEEKDATA: - case PTRACE_PEEKTEXT: - case PTRACE_PEEKUSR: - /* The value being read out could be -1, so we have to - * check errno to see if there's an error, and zero it - * beforehand so we're not faked out by an old error - */ - - errno = 0; - result = ptrace(arg1, child, arg3, 0); - if((result == -1) && (errno != 0)) return(-errno); - - result = ptrace(PTRACE_POKEDATA, debugger->pid, arg4, result); - if(result == -1) return(-errno); - - return(result); - - case PTRACE_POKEDATA: - case PTRACE_POKETEXT: - case PTRACE_POKEUSR: - result = ptrace(arg1, child, arg3, arg4); - if(result == -1) return(-errno); - - if(arg1 == PTRACE_POKEUSR) ptrace_pokeuser(arg3, arg4); - return(result); - -#ifdef UM_HAVE_SETFPREGS - case PTRACE_SETFPREGS: - { - long regs[FP_FRAME_SIZE]; - int i; - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - regs[i] = ptrace (PTRACE_PEEKDATA, debugger->pid, - arg4 + 4 * i, 0); - result = ptrace(PTRACE_SETFPREGS, child, 0, regs); - if(result == -1) return(-errno); - - return(result); - } -#endif - -#ifdef UM_HAVE_SETFPXREGS - case PTRACE_SETFPXREGS: - { - long regs[FPX_FRAME_SIZE]; - int i; - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - regs[i] = ptrace (PTRACE_PEEKDATA, debugger->pid, - arg4 + 4 * i, 0); - result = ptrace(PTRACE_SETFPXREGS, child, 0, regs); - if(result == -1) return(-errno); - - return(result); - } -#endif - -#ifdef UM_HAVE_SETREGS - case PTRACE_SETREGS: - { - long regs[FRAME_SIZE]; - int i; - - for (i = 0; i < sizeof(regs)/sizeof(regs[0]); i++) - regs[i] = ptrace(PTRACE_PEEKDATA, debugger->pid, - arg4 + 4 * i, 0); - result = ptrace(PTRACE_SETREGS, child, 0, regs); - if(result == -1) return(-errno); - - return(result); - } -#endif - - case PTRACE_SINGLESTEP: - if(!debugger->debugee->in_context) return(-EPERM); - sigemptyset(&relay); - sigaddset(&relay, SIGSEGV); - sigaddset(&relay, SIGILL); - sigaddset(&relay, SIGBUS); - result = ptrace(PTRACE_SINGLESTEP, child, arg3, arg4); - if(result == -1) return(-errno); - - status = wait_for_stop(child, SIGTRAP, PTRACE_SINGLESTEP, - &relay); - child_proxy(child, status); - return(result); - - case PTRACE_SYSCALL: - if(!debugger->debugee->in_context) return(-EPERM); - result = ptrace(PTRACE_SYSCALL, child, arg3, arg4); - if(result == -1) return(-errno); - - *ret = PTRACE_SYSCALL; - return(result); - - case PTRACE_TRACEME: - default: - return(-EINVAL); - } -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/sysdep.c b/arch/um/kernel/tt/ptproxy/sysdep.c deleted file mode 100644 index e0e1ab0588a..00000000000 --- a/arch/um/kernel/tt/ptproxy/sysdep.c +++ /dev/null @@ -1,70 +0,0 @@ -/********************************************************************** -sysdep.c - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. -**********************************************************************/ - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <signal.h> -#include <errno.h> -#include <sys/types.h> -#include <linux/unistd.h> -#include "ptrace_user.h" -#include "user.h" -#include "os.h" - -int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3, long *arg4, - long *arg5) -{ - *arg1 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG1_OFFSET, 0); - *arg2 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG2_OFFSET, 0); - *arg3 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG3_OFFSET, 0); - *arg4 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG4_OFFSET, 0); - *arg5 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG5_OFFSET, 0); - return(ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, 0)); -} - -void syscall_cancel(pid_t pid, int result) -{ - if((ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, - __NR_getpid) < 0) || - (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) || - (wait_for_stop(pid, SIGTRAP, PTRACE_SYSCALL, NULL) < 0) || - (ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result) < 0) || - (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0)) - printk("ptproxy: couldn't cancel syscall: errno = %d\n", - errno); -} - -void syscall_set_result(pid_t pid, long result) -{ - ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result); -} - -void syscall_continue(pid_t pid) -{ - ptrace(PTRACE_SYSCALL, pid, 0, 0); -} - -int syscall_pause(pid_t pid) -{ - if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_pause) < 0){ - printk("syscall_change - ptrace failed, errno = %d\n", errno); - return(-1); - } - return(0); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/sysdep.h b/arch/um/kernel/tt/ptproxy/sysdep.h deleted file mode 100644 index 735f488049a..00000000000 --- a/arch/um/kernel/tt/ptproxy/sysdep.h +++ /dev/null @@ -1,25 +0,0 @@ -/********************************************************************** -sysdep.h - -Copyright (C) 1999 Lars Brinkhoff. -Copyright (C) 2001 Jeff Dike (jdike@karaya.com) -See the file COPYING for licensing terms and conditions. -**********************************************************************/ - -extern int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3, - long *arg4, long *arg5); -extern void syscall_cancel (pid_t pid, long result); -extern void syscall_set_result (pid_t pid, long result); -extern void syscall_continue (pid_t pid); -extern int syscall_pause(pid_t pid); - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/wait.c b/arch/um/kernel/tt/ptproxy/wait.c deleted file mode 100644 index bdd4af4b65f..00000000000 --- a/arch/um/kernel/tt/ptproxy/wait.c +++ /dev/null @@ -1,85 +0,0 @@ -/********************************************************************** -wait.c - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. - -**********************************************************************/ - -#include <errno.h> -#include <signal.h> -#include <sys/wait.h> - -#include "ptproxy.h" -#include "sysdep.h" -#include "wait.h" -#include "ptrace_user.h" -#include "sysdep/ptrace.h" -#include "sysdep/sigcontext.h" - -int proxy_wait_return(struct debugger *debugger, pid_t unused) -{ - debugger->waiting = 0; - - if(debugger->debugee->died || (debugger->wait_options & __WCLONE)){ - debugger_cancelled_return(debugger, -ECHILD); - return(0); - } - - if(debugger->debugee->zombie && debugger->debugee->event) - debugger->debugee->died = 1; - - if(debugger->debugee->event){ - debugger->debugee->event = 0; - ptrace(PTRACE_POKEDATA, debugger->pid, - debugger->wait_status_ptr, - debugger->debugee->wait_status); - /* if (wait4) - ptrace (PTRACE_POKEDATA, pid, rusage_ptr, ...); */ - debugger_cancelled_return(debugger, debugger->debugee->pid); - return(0); - } - - /* pause will return -EINTR, which happens to be right for wait */ - debugger_normal_return(debugger, -1); - return(0); -} - -int parent_wait_return(struct debugger *debugger, pid_t unused) -{ - return(debugger_normal_return(debugger, -1)); -} - -int real_wait_return(struct debugger *debugger) -{ - unsigned long ip; - int pid; - - pid = debugger->pid; - - ip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0); - IP_RESTART_SYSCALL(ip); - - if(ptrace(PTRACE_POKEUSR, pid, PT_IP_OFFSET, ip) < 0) - tracer_panic("real_wait_return : Failed to restart system " - "call, errno = %d\n", errno); - - if((ptrace(PTRACE_SYSCALL, debugger->pid, 0, SIGCHLD) < 0) || - (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) || - (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) || - debugger_normal_return(debugger, -1)) - tracer_panic("real_wait_return : gdb failed to wait, " - "errno = %d\n", errno); - return(0); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/ptproxy/wait.h b/arch/um/kernel/tt/ptproxy/wait.h deleted file mode 100644 index 542e73ee2ce..00000000000 --- a/arch/um/kernel/tt/ptproxy/wait.h +++ /dev/null @@ -1,15 +0,0 @@ -/********************************************************************** -wait.h - -Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing -terms and conditions. -**********************************************************************/ - -#ifndef __PTPROXY_WAIT_H -#define __PTPROXY_WAIT_H - -extern int proxy_wait_return(struct debugger *debugger, pid_t unused); -extern int real_wait_return(struct debugger *debugger); -extern int parent_wait_return(struct debugger *debugger, pid_t unused); - -#endif diff --git a/arch/um/kernel/tt/syscall_kern.c b/arch/um/kernel/tt/syscall_kern.c deleted file mode 100644 index 293caa6d0c2..00000000000 --- a/arch/um/kernel/tt/syscall_kern.c +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) - * Licensed under the GPL - */ - -#include "linux/types.h" -#include "linux/utime.h" -#include "linux/sys.h" -#include "linux/ptrace.h" -#include "asm/unistd.h" -#include "asm/ptrace.h" -#include "asm/uaccess.h" -#include "asm/stat.h" -#include "sysdep/syscalls.h" -#include "sysdep/sigcontext.h" -#include "kern_util.h" -#include "syscall.h" - -void syscall_handler_tt(int sig, struct pt_regs *regs) -{ - void *sc; - long result; - int syscall; - - sc = UPT_SC(®s->regs); - SC_START_SYSCALL(sc); - - syscall = UPT_SYSCALL_NR(®s->regs); - syscall_trace(®s->regs, 0); - - current->thread.nsyscalls++; - nsyscalls++; - - if((syscall >= NR_syscalls) || (syscall < 0)) - result = -ENOSYS; - else result = EXECUTE_SYSCALL(syscall, regs); - - /* regs->sc may have changed while the system call ran (there may - * have been an interrupt or segfault), so it needs to be refreshed. - */ - UPT_SC(®s->regs) = sc; - - SC_SET_SYSCALL_RETURN(sc, result); - - syscall_trace(®s->regs, 1); -} diff --git a/arch/um/kernel/tt/syscall_user.c b/arch/um/kernel/tt/syscall_user.c deleted file mode 100644 index f52b47aff1d..00000000000 --- a/arch/um/kernel/tt/syscall_user.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <unistd.h> -#include <signal.h> -#include <errno.h> -#include <asm/unistd.h> -#include "sysdep/ptrace.h" -#include "sigcontext.h" -#include "ptrace_user.h" -#include "task.h" -#include "kern_util.h" -#include "syscall.h" -#include "tt.h" - -void do_sigtrap(void *task) -{ - UPT_SYSCALL_NR(TASK_REGS(task)) = -1; -} - -void do_syscall(void *task, int pid, int local_using_sysemu) -{ - unsigned long proc_regs[FRAME_SIZE]; - - if(ptrace_getregs(pid, proc_regs) < 0) - tracer_panic("Couldn't read registers"); - - UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs); - -#ifdef UPT_ORIGGPR2 - UPT_ORIGGPR2(TASK_REGS(task)) = REGS_ORIGGPR2(proc_regs); -#endif - - if(((unsigned long *) PT_IP(proc_regs) >= &_stext) && - ((unsigned long *) PT_IP(proc_regs) <= &_etext)) - tracer_panic("I'm tracing myself and I can't get out"); - - /* advanced sysemu mode set syscall number to -1 automatically */ - if (local_using_sysemu==2) - return; - - /* syscall number -1 in sysemu skips syscall restarting in host */ - if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, - local_using_sysemu ? -1 : __NR_getpid) < 0) - tracer_panic("do_syscall : Nullifying syscall failed, " - "errno = %d", errno); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/tlb.c b/arch/um/kernel/tt/tlb.c deleted file mode 100644 index 7caa24fe05d..00000000000 --- a/arch/um/kernel/tt/tlb.c +++ /dev/null @@ -1,120 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Copyright 2003 PathScale, Inc. - * Licensed under the GPL - */ - -#include "linux/stddef.h" -#include "linux/kernel.h" -#include "linux/sched.h" -#include "linux/mm.h" -#include "asm/page.h" -#include "asm/pgtable.h" -#include "asm/uaccess.h" -#include "asm/tlbflush.h" -#include "mem_user.h" -#include "os.h" -#include "tlb.h" - -static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last, - int finished, void **flush) -{ - struct host_vm_op *op; - int i, ret=0; - - for(i = 0; i <= last && !ret; i++){ - op = &ops[i]; - switch(op->type){ - case MMAP: - ret = os_map_memory((void *) op->u.mmap.addr, - op->u.mmap.fd, op->u.mmap.offset, - op->u.mmap.len, op->u.mmap.r, - op->u.mmap.w, op->u.mmap.x); - break; - case MUNMAP: - ret = os_unmap_memory((void *) op->u.munmap.addr, - op->u.munmap.len); - break; - case MPROTECT: - ret = protect_memory(op->u.mprotect.addr, - op->u.munmap.len, - op->u.mprotect.r, - op->u.mprotect.w, - op->u.mprotect.x, 1); - protect_memory(op->u.mprotect.addr, op->u.munmap.len, - op->u.mprotect.r, op->u.mprotect.w, - op->u.mprotect.x, 1); - break; - default: - printk("Unknown op type %d in do_ops\n", op->type); - break; - } - } - - return ret; -} - -static void fix_range(struct mm_struct *mm, unsigned long start_addr, - unsigned long end_addr, int force) -{ - if((current->thread.mode.tt.extern_pid != -1) && - (current->thread.mode.tt.extern_pid != os_getpid())) - panic("fix_range fixing wrong address space, current = 0x%p", - current); - - fix_range_common(mm, start_addr, end_addr, force, do_ops); -} - -atomic_t vmchange_seq = ATOMIC_INIT(1); - -void flush_tlb_kernel_range_tt(unsigned long start, unsigned long end) -{ - if(flush_tlb_kernel_range_common(start, end)) - atomic_inc(&vmchange_seq); -} - -void flush_tlb_kernel_vm_tt(void) -{ - flush_tlb_kernel_range(start_vm, end_vm); -} - -void __flush_tlb_one_tt(unsigned long addr) -{ - flush_tlb_kernel_range(addr, addr + PAGE_SIZE); -} - -void flush_tlb_range_tt(struct vm_area_struct *vma, unsigned long start, - unsigned long end) -{ - if(vma->vm_mm != current->mm) return; - - /* Assumes that the range start ... end is entirely within - * either process memory or kernel vm - */ - if((start >= start_vm) && (start < end_vm)){ - if(flush_tlb_kernel_range_common(start, end)) - atomic_inc(&vmchange_seq); - } - else fix_range(vma->vm_mm, start, end, 0); -} - -void flush_tlb_mm_tt(struct mm_struct *mm) -{ - unsigned long seq; - - if(mm != current->mm) return; - - fix_range(mm, 0, STACK_TOP, 0); - - seq = atomic_read(&vmchange_seq); - if(current->thread.mode.tt.vm_seq == seq) - return; - current->thread.mode.tt.vm_seq = seq; - flush_tlb_kernel_range_common(start_vm, end_vm); -} - -void force_flush_all_tt(void) -{ - fix_range(current->mm, 0, STACK_TOP, 1); - flush_tlb_kernel_range_common(start_vm, end_vm); -} diff --git a/arch/um/kernel/tt/tracer.c b/arch/um/kernel/tt/tracer.c deleted file mode 100644 index c23588393f6..00000000000 --- a/arch/um/kernel/tt/tracer.c +++ /dev/null @@ -1,461 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <unistd.h> -#include <signal.h> -#include <errno.h> -#include <sched.h> -#include <string.h> -#include <sys/mman.h> -#include <sys/time.h> -#include <sys/wait.h> -#include "user.h" -#include "sysdep/ptrace.h" -#include "sigcontext.h" -#include "sysdep/sigcontext.h" -#include "os.h" -#include "mem_user.h" -#include "process.h" -#include "kern_util.h" -#include "chan_user.h" -#include "ptrace_user.h" -#include "irq_user.h" -#include "mode.h" -#include "tt.h" - -static int tracer_winch[2]; - -int is_tracer_winch(int pid, int fd, void *data) -{ - if(pid != os_getpgrp()) - return(0); - - register_winch_irq(tracer_winch[0], fd, -1, data); - return(1); -} - -static void tracer_winch_handler(int sig) -{ - int n; - char c = 1; - - n = os_write_file(tracer_winch[1], &c, sizeof(c)); - if(n != sizeof(c)) - printk("tracer_winch_handler - write failed, err = %d\n", -n); -} - -/* Called only by the tracing thread during initialization */ - -static void setup_tracer_winch(void) -{ - int err; - - err = os_pipe(tracer_winch, 1, 1); - if(err < 0){ - printk("setup_tracer_winch : os_pipe failed, err = %d\n", -err); - return; - } - signal(SIGWINCH, tracer_winch_handler); -} - -void attach_process(int pid) -{ - if((ptrace(PTRACE_ATTACH, pid, 0, 0) < 0) || - (ptrace(PTRACE_CONT, pid, 0, 0) < 0)) - tracer_panic("OP_FORK failed to attach pid"); - wait_for_stop(pid, SIGSTOP, PTRACE_CONT, NULL); - if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0) - tracer_panic("OP_FORK: PTRACE_SETOPTIONS failed, errno = %d", errno); - if(ptrace(PTRACE_CONT, pid, 0, 0) < 0) - tracer_panic("OP_FORK failed to continue process"); -} - -void tracer_panic(char *format, ...) -{ - va_list ap; - - va_start(ap, format); - vprintf(format, ap); - va_end(ap); - printf("\n"); - while(1) pause(); -} - -static void tracer_segv(int sig, struct sigcontext sc) -{ - struct faultinfo fi; - GET_FAULTINFO_FROM_SC(fi, &sc); - printf("Tracing thread segfault at address 0x%lx, ip 0x%lx\n", - FAULT_ADDRESS(fi), SC_IP(&sc)); - while(1) - pause(); -} - -/* Changed early in boot, and then only read */ -int debug = 0; -int debug_stop = 1; -int debug_parent = 0; -int honeypot = 0; - -static int signal_tramp(void *arg) -{ - int (*proc)(void *); - - if(honeypot && munmap((void *) (host_task_size - 0x10000000), - 0x10000000)) - panic("Unmapping stack failed"); - if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0) - panic("ptrace PTRACE_TRACEME failed"); - os_stop_process(os_getpid()); - change_sig(SIGWINCH, 0); - signal(SIGUSR1, SIG_IGN); - change_sig(SIGCHLD, 0); - signal(SIGSEGV, (__sighandler_t) sig_handler); - set_cmdline("(idle thread)"); - set_init_pid(os_getpid()); - init_irq_signals(0); - proc = arg; - return((*proc)(NULL)); -} - -static void sleeping_process_signal(int pid, int sig) -{ - switch(sig){ - /* These two result from UML being ^Z-ed and bg-ed. PTRACE_CONT is - * right because the process must be in the kernel already. - */ - case SIGCONT: - case SIGTSTP: - if(ptrace(PTRACE_CONT, pid, 0, sig) < 0) - tracer_panic("sleeping_process_signal : Failed to " - "continue pid %d, signal = %d, " - "errno = %d\n", pid, sig, errno); - break; - - /* This happens when the debugger (e.g. strace) is doing system call - * tracing on the kernel. During a context switch, the current task - * will be set to the incoming process and the outgoing process will - * hop into write and then read. Since it's not the current process - * any more, the trace of those will land here. So, we need to just - * PTRACE_SYSCALL it. - */ - case (SIGTRAP + 0x80): - if(ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) - tracer_panic("sleeping_process_signal : Failed to " - "PTRACE_SYSCALL pid %d, errno = %d\n", - pid, errno); - break; - case SIGSTOP: - break; - default: - tracer_panic("sleeping process %d got unexpected " - "signal : %d\n", pid, sig); - break; - } -} - -/* Accessed only by the tracing thread */ -int debugger_pid = -1; -int debugger_parent = -1; -int debugger_fd = -1; -int gdb_pid = -1; - -struct { - int pid; - int signal; - unsigned long addr; - struct timeval time; -} signal_record[1024][32]; - -int signal_index[32]; -int nsignals = 0; -int debug_trace = 0; - -extern void signal_usr1(int sig); - -int tracing_pid = -1; - -int tracer(int (*init_proc)(void *), void *sp) -{ - void *task = NULL; - int status, pid = 0, sig = 0, cont_type, tracing = 0, op = 0; - int proc_id = 0, n, err, old_tracing = 0, strace = 0; - int local_using_sysemu = 0; - - signal(SIGPIPE, SIG_IGN); - setup_tracer_winch(); - tracing_pid = os_getpid(); - printf("tracing thread pid = %d\n", tracing_pid); - - pid = clone(signal_tramp, sp, CLONE_FILES | SIGCHLD, init_proc); - CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0){ - printf("waitpid on idle thread failed, errno = %d\n", errno); - exit(1); - } - if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0) { - printf("Failed to PTRACE_SETOPTIONS for idle thread, errno = %d\n", errno); - exit(1); - } - if((ptrace(PTRACE_CONT, pid, 0, 0) < 0)){ - printf("Failed to continue idle thread, errno = %d\n", errno); - exit(1); - } - - signal(SIGSEGV, (sighandler_t) tracer_segv); - signal(SIGUSR1, signal_usr1); - if(debug_trace){ - printf("Tracing thread pausing to be attached\n"); - stop(); - } - if(debug){ - if(gdb_pid != -1) - debugger_pid = attach_debugger(pid, gdb_pid, 1); - else debugger_pid = init_ptrace_proxy(pid, 1, debug_stop); - if(debug_parent){ - debugger_parent = os_process_parent(debugger_pid); - init_parent_proxy(debugger_parent); - err = attach(debugger_parent); - if(err){ - printf("Failed to attach debugger parent %d, " - "errno = %d\n", debugger_parent, -err); - debugger_parent = -1; - } - else { - if(ptrace(PTRACE_SYSCALL, debugger_parent, - 0, 0) < 0){ - printf("Failed to continue debugger " - "parent, errno = %d\n", errno); - debugger_parent = -1; - } - } - } - } - set_cmdline("(tracing thread)"); - while(1){ - CATCH_EINTR(pid = waitpid(-1, &status, WUNTRACED)); - if(pid <= 0){ - if(errno != ECHILD){ - printf("wait failed - errno = %d\n", errno); - } - continue; - } - if(pid == debugger_pid){ - int cont = 0; - - if(WIFEXITED(status) || WIFSIGNALED(status)) - debugger_pid = -1; - /* XXX Figure out how to deal with gdb and SMP */ - else cont = debugger_signal(status, cpu_tasks[0].pid); - if(cont == PTRACE_SYSCALL) strace = 1; - continue; - } - else if(pid == debugger_parent){ - debugger_parent_signal(status, pid); - continue; - } - nsignals++; - if(WIFEXITED(status)) ; -#ifdef notdef - { - printf("Child %d exited with status %d\n", pid, - WEXITSTATUS(status)); - } -#endif - else if(WIFSIGNALED(status)){ - sig = WTERMSIG(status); - if(sig != 9){ - printf("Child %d exited with signal %d\n", pid, - sig); - } - } - else if(WIFSTOPPED(status)){ - proc_id = pid_to_processor_id(pid); - sig = WSTOPSIG(status); - if(proc_id == -1){ - sleeping_process_signal(pid, sig); - continue; - } - - task = cpu_tasks[proc_id].task; - tracing = is_tracing(task); - old_tracing = tracing; - - /* Assume: no syscall, when coming from user */ - if ( tracing ) - do_sigtrap(task); - - switch(sig){ - case SIGUSR1: - sig = 0; - op = do_proc_op(task, proc_id); - switch(op){ - /* - * This is called when entering user mode; after - * this, we start intercepting syscalls. - * - * In fact, a process is started in kernel mode, - * so with is_tracing() == 0 (and that is reset - * when executing syscalls, since UML kernel has - * the right to do syscalls); - */ - case OP_TRACE_ON: - arch_leave_kernel(task, pid); - tracing = 1; - break; - case OP_REBOOT: - case OP_HALT: - unmap_physmem(); - kmalloc_ok = 0; - os_kill_ptraced_process(pid, 0); - /* Now let's reap remaining zombies */ - errno = 0; - do { - waitpid(-1, &status, - WUNTRACED); - } while (errno != ECHILD); - return(op == OP_REBOOT); - case OP_NONE: - printf("Detaching pid %d\n", pid); - detach(pid, SIGSTOP); - continue; - default: - break; - } - /* OP_EXEC switches host processes on us, - * we want to continue the new one. - */ - pid = cpu_tasks[proc_id].pid; - break; - case (SIGTRAP + 0x80): - if(!tracing && (debugger_pid != -1)){ - child_signal(pid, status & 0x7fff); - continue; - } - tracing = 0; - /* local_using_sysemu has been already set - * below, since if we are here, is_tracing() on - * the traced task was 1, i.e. the process had - * already run through one iteration of the - * loop which executed a OP_TRACE_ON request.*/ - do_syscall(task, pid, local_using_sysemu); - sig = SIGUSR2; - break; - case SIGTRAP: - if(!tracing && (debugger_pid != -1)){ - child_signal(pid, status); - continue; - } - tracing = 0; - break; - case SIGPROF: - if(tracing) sig = 0; - break; - case SIGCHLD: - case SIGHUP: - sig = 0; - break; - case SIGSEGV: - case SIGIO: - case SIGALRM: - case SIGVTALRM: - case SIGFPE: - case SIGBUS: - case SIGILL: - case SIGWINCH: - - default: - tracing = 0; - break; - } - set_tracing(task, tracing); - - if(!tracing && old_tracing) - arch_enter_kernel(task, pid); - - if(!tracing && (debugger_pid != -1) && (sig != 0) && - (sig != SIGALRM) && (sig != SIGVTALRM) && - (sig != SIGSEGV) && (sig != SIGTRAP) && - (sig != SIGUSR2) && (sig != SIGIO) && - (sig != SIGFPE)){ - child_signal(pid, status); - continue; - } - - local_using_sysemu = get_using_sysemu(); - - if(tracing) - cont_type = SELECT_PTRACE_OPERATION(local_using_sysemu, - singlestepping(task)); - else if((debugger_pid != -1) && strace) - cont_type = PTRACE_SYSCALL; - else - cont_type = PTRACE_CONT; - - if(ptrace(cont_type, pid, 0, sig) != 0){ - tracer_panic("ptrace failed to continue " - "process - errno = %d\n", - errno); - } - } - } - return(0); -} - -static int __init uml_debug_setup(char *line, int *add) -{ - char *next; - - debug = 1; - *add = 0; - if(*line != '=') return(0); - line++; - - while(line != NULL){ - next = strchr(line, ','); - if(next) *next++ = '\0'; - - if(!strcmp(line, "go")) debug_stop = 0; - else if(!strcmp(line, "parent")) debug_parent = 1; - else printf("Unknown debug option : '%s'\n", line); - - line = next; - } - return(0); -} - -__uml_setup("debug", uml_debug_setup, -"debug\n" -" Starts up the kernel under the control of gdb. See the \n" -" kernel debugging tutorial and the debugging session pages\n" -" at http://user-mode-linux.sourceforge.net/ for more information.\n\n" -); - -static int __init uml_debugtrace_setup(char *line, int *add) -{ - debug_trace = 1; - return 0; -} -__uml_setup("debugtrace", uml_debugtrace_setup, -"debugtrace\n" -" Causes the tracing thread to pause until it is attached by a\n" -" debugger and continued. This is mostly for debugging crashes\n" -" early during boot, and should be pretty much obsoleted by\n" -" the debug switch.\n\n" -); - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/trap_user.c b/arch/um/kernel/tt/trap_user.c deleted file mode 100644 index 3032eb5e246..00000000000 --- a/arch/um/kernel/tt/trap_user.c +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdlib.h> -#include <errno.h> -#include <signal.h> -#include "sysdep/ptrace.h" -#include "sysdep/sigcontext.h" -#include "kern_util.h" -#include "task.h" -#include "tt.h" -#include "os.h" - -void sig_handler_common_tt(int sig, void *sc_ptr) -{ - struct sigcontext *sc = sc_ptr; - struct tt_regs save_regs, *r; - int save_errno = errno, is_user = 0; - void (*handler)(int, union uml_pt_regs *); - - /* This is done because to allow SIGSEGV to be delivered inside a SEGV - * handler. This can happen in copy_user, and if SEGV is disabled, - * the process will die. - */ - if(sig == SIGSEGV) - change_sig(SIGSEGV, 1); - - r = &TASK_REGS(get_current())->tt; - if ( sig == SIGFPE || sig == SIGSEGV || - sig == SIGBUS || sig == SIGILL || - sig == SIGTRAP ) { - GET_FAULTINFO_FROM_SC(r->faultinfo, sc); - } - save_regs = *r; - if (sc) - is_user = user_context(SC_SP(sc)); - r->sc = sc; - if(sig != SIGUSR2) - r->syscall = -1; - - handler = sig_info[sig]; - - /* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */ - if (sig != SIGIO && sig != SIGWINCH && - sig != SIGVTALRM && sig != SIGALRM) - unblock_signals(); - - handler(sig, (union uml_pt_regs *) r); - - if(is_user){ - interrupt_end(); - block_signals(); - set_user_mode(NULL); - } - *r = save_regs; - errno = save_errno; -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/uaccess.c b/arch/um/kernel/tt/uaccess.c deleted file mode 100644 index 1cb60726567..00000000000 --- a/arch/um/kernel/tt/uaccess.c +++ /dev/null @@ -1,73 +0,0 @@ -/* - * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) - * Licensed under the GPL - */ - -#include "linux/sched.h" -#include "asm/uaccess.h" - -int copy_from_user_tt(void *to, const void __user *from, int n) -{ - if(!access_ok(VERIFY_READ, from, n)) - return(n); - - return(__do_copy_from_user(to, from, n, ¤t->thread.fault_addr, - ¤t->thread.fault_catcher)); -} - -int copy_to_user_tt(void __user *to, const void *from, int n) -{ - if(!access_ok(VERIFY_WRITE, to, n)) - return(n); - - return(__do_copy_to_user(to, from, n, ¤t->thread.fault_addr, - ¤t->thread.fault_catcher)); -} - -int strncpy_from_user_tt(char *dst, const char __user *src, int count) -{ - int n; - - if(!access_ok(VERIFY_READ, src, 1)) - return(-EFAULT); - - n = __do_strncpy_from_user(dst, src, count, - ¤t->thread.fault_addr, - ¤t->thread.fault_catcher); - if(n < 0) return(-EFAULT); - return(n); -} - -int __clear_user_tt(void __user *mem, int len) -{ - return(__do_clear_user(mem, len, - ¤t->thread.fault_addr, - ¤t->thread.fault_catcher)); -} - -int clear_user_tt(void __user *mem, int len) -{ - if(!access_ok(VERIFY_WRITE, mem, len)) - return(len); - - return(__do_clear_user(mem, len, ¤t->thread.fault_addr, - ¤t->thread.fault_catcher)); -} - -int strnlen_user_tt(const void __user *str, int len) -{ - return(__do_strnlen_user(str, len, - ¤t->thread.fault_addr, - ¤t->thread.fault_catcher)); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c deleted file mode 100644 index 0e5c82c5e5b..00000000000 --- a/arch/um/kernel/tt/uaccess_user.c +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) - * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <string.h> -#include "uml_uaccess.h" -#include "task.h" -#include "kern_util.h" -#include "os.h" -#include "longjmp.h" - -int __do_copy_from_user(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher) -{ - struct tt_regs save = TASK_REGS(get_current())->tt; - unsigned long fault; - int faulted; - - fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, - __do_copy, &faulted); - TASK_REGS(get_current())->tt = save; - - if(!faulted) - return 0; - else if (fault) - return n - (fault - (unsigned long) from); - else - /* In case of a general protection fault, we don't have the - * fault address, so NULL is used instead. Pretend we didn't - * copy anything. */ - return n; -} - -static void __do_strncpy(void *dst, const void *src, int count) -{ - strncpy(dst, src, count); -} - -int __do_strncpy_from_user(char *dst, const char *src, unsigned long count, - void **fault_addr, void **fault_catcher) -{ - struct tt_regs save = TASK_REGS(get_current())->tt; - unsigned long fault; - int faulted; - - fault = __do_user_copy(dst, src, count, fault_addr, fault_catcher, - __do_strncpy, &faulted); - TASK_REGS(get_current())->tt = save; - - if(!faulted) return(strlen(dst)); - else return(-1); -} - -static void __do_clear(void *to, const void *from, int n) -{ - memset(to, 0, n); -} - -int __do_clear_user(void *mem, unsigned long len, - void **fault_addr, void **fault_catcher) -{ - struct tt_regs save = TASK_REGS(get_current())->tt; - unsigned long fault; - int faulted; - - fault = __do_user_copy(mem, NULL, len, fault_addr, fault_catcher, - __do_clear, &faulted); - TASK_REGS(get_current())->tt = save; - - if(!faulted) return(0); - else return(len - (fault - (unsigned long) mem)); -} - -int __do_strnlen_user(const char *str, unsigned long n, - void **fault_addr, void **fault_catcher) -{ - struct tt_regs save = TASK_REGS(get_current())->tt; - int ret; - unsigned long *faddrp = (unsigned long *)fault_addr; - jmp_buf jbuf; - - *fault_catcher = &jbuf; - if(UML_SETJMP(&jbuf) == 0) - ret = strlen(str) + 1; - else ret = *faddrp - (unsigned long) str; - - *fault_addr = NULL; - *fault_catcher = NULL; - - TASK_REGS(get_current())->tt = save; - return ret; -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index ecc458fe51b..aa7b067565d 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -38,9 +38,7 @@ #include "choose-mode.h" #include "mode_kern.h" #include "mode.h" -#ifdef UML_CONFIG_MODE_SKAS #include "skas.h" -#endif #define DEFAULT_COMMAND_LINE "root=98:0" @@ -132,43 +130,12 @@ unsigned long end_vm; /* Set in uml_ncpus_setup */ int ncpus = 1; -#ifdef CONFIG_CMDLINE_ON_HOST -/* Pointer set in linux_main, the array itself is private to each thread, - * and changed at address space creation time so this poses no concurrency - * problems. - */ -static char *argv1_begin = NULL; -static char *argv1_end = NULL; -#endif - /* Set in early boot */ static int have_root __initdata = 0; /* Set in uml_mem_setup and modified in linux_main */ long long physmem_size = 32 * 1024 * 1024; -void set_cmdline(char *cmd) -{ -#ifdef CONFIG_CMDLINE_ON_HOST - char *umid, *ptr; - - if(CHOOSE_MODE(honeypot, 0)) return; - - umid = get_umid(); - if(*umid != '\0'){ - snprintf(argv1_begin, - (argv1_end - argv1_begin) * sizeof(*ptr), - "(%s) ", umid); - ptr = &argv1_begin[strlen(argv1_begin)]; - } - else ptr = argv1_begin; - - snprintf(ptr, (argv1_end - ptr) * sizeof(*ptr), "[%s]", cmd); - memset(argv1_begin + strlen(argv1_begin), '\0', - argv1_end - argv1_begin - strlen(argv1_begin)); -#endif -} - static char *usage_string = "User Mode Linux v%s\n" " available at http://user-mode-linux.sourceforge.net/\n\n"; @@ -201,13 +168,10 @@ __uml_setup("root=", uml_root_setup, " root=/dev/ubd5\n\n" ); -#ifndef CONFIG_MODE_TT - static int __init no_skas_debug_setup(char *line, int *add) { printf("'debug' is not necessary to gdb UML in skas mode - run \n"); - printf("'gdb linux' and disable CONFIG_CMDLINE_ON_HOST if gdb \n"); - printf("doesn't work as expected\n"); + printf("'gdb linux'"); return 0; } @@ -217,8 +181,6 @@ __uml_setup("debug", no_skas_debug_setup, " this flag is not needed to run gdb on UML in skas mode\n\n" ); -#endif - #ifdef CONFIG_SMP static int __init uml_ncpus_setup(char *line, int *add) { @@ -236,52 +198,6 @@ __uml_setup("ncpus=", uml_ncpus_setup, ); #endif -static int force_tt = 0; - -#if defined(CONFIG_MODE_TT) && defined(CONFIG_MODE_SKAS) -#define DEFAULT_TT 0 - -static int __init mode_tt_setup(char *line, int *add) -{ - force_tt = 1; - return 0; -} - -#else -#ifdef CONFIG_MODE_SKAS - -#define DEFAULT_TT 0 - -static int __init mode_tt_setup(char *line, int *add) -{ - printf("CONFIG_MODE_TT disabled - 'mode=tt' ignored\n"); - return 0; -} - -#else -#ifdef CONFIG_MODE_TT - -#define DEFAULT_TT 1 - -static int __init mode_tt_setup(char *line, int *add) -{ - printf("CONFIG_MODE_SKAS disabled - 'mode=tt' redundant\n"); - return 0; -} - -#endif -#endif -#endif - -__uml_setup("mode=tt", mode_tt_setup, -"mode=tt\n" -" When both CONFIG_MODE_TT and CONFIG_MODE_SKAS are enabled, this option\n" -" forces UML to run in tt (tracing thread) mode. It is not the default\n" -" because it's slower and less secure than skas mode.\n\n" -); - -int mode_tt = DEFAULT_TT; - static int __init Usage(char *line, int *add) { const char **p; @@ -357,29 +273,13 @@ int __init linux_main(int argc, char **argv) add_arg(DEFAULT_COMMAND_LINE); os_early_checks(); - if (force_tt) - clear_can_do_skas(); - mode_tt = force_tt ? 1 : !can_do_skas(); -#ifndef CONFIG_MODE_TT - if (mode_tt) { - /*Since CONFIG_MODE_TT is #undef'ed, force_tt cannot be 1. So, - * can_do_skas() returned 0, and the message is correct. */ - printf("Support for TT mode is disabled, and no SKAS support is present on the host.\n"); - exit(1); - } -#endif -#ifndef CONFIG_MODE_SKAS - mode = "TT"; -#else - /* Show to the user the result of selection */ - if (mode_tt) - mode = "TT"; - else if (proc_mm && ptrace_faultinfo) + can_do_skas(); + + if (proc_mm && ptrace_faultinfo) mode = "SKAS3"; else mode = "SKAS0"; -#endif printf("UML running in %s mode\n", mode); @@ -411,11 +311,6 @@ int __init linux_main(int argc, char **argv) setup_machinename(init_utsname()->machine); -#ifdef CONFIG_CMDLINE_ON_HOST - argv1_begin = argv[1]; - argv1_end = &argv[1][strlen(argv[1])]; -#endif - highmem = 0; iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC; diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S index 81acdc24348..13df191e2b4 100644 --- a/arch/um/kernel/uml.lds.S +++ b/arch/um/kernel/uml.lds.S @@ -18,13 +18,6 @@ SECTIONS . = START + SIZEOF_HEADERS; -#ifdef MODE_TT - .remap_data : { UNMAP_PATH (.data .bss) } - .remap : { UNMAP_PATH (.text) } - - . = ALIGN(4096); /* Init code and data */ -#endif - _text = .; _stext = .; __init_begin = .; diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index f1bb58fe320..1dbb45dfc49 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -5,12 +5,7 @@ obj-y = aio.o elf_aux.o execvp.o file.o helper.o irq.o main.o mem.o process.o \ registers.o sigio.o signal.o start_up.o time.o trap.o tty.o uaccess.o \ - umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ - -obj-$(CONFIG_MODE_SKAS) += skas/ - -obj-$(CONFIG_MODE_TT) += tt.o -user-objs-$(CONFIG_MODE_TT) += tt.o + umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ skas/ obj-$(CONFIG_TTY_LOG) += tty_log.o user-objs-$(CONFIG_TTY_LOG) += tty_log.o diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c index 919c25be254..425aa896064 100644 --- a/arch/um/os-Linux/main.c +++ b/arch/um/os-Linux/main.c @@ -25,9 +25,6 @@ #include "um_malloc.h" #include "kern_constants.h" -/* Set in main, unchanged thereafter */ -char *linux_prog; - #define PGD_BOUND (4 * 1024 * 1024) #define STACKSIZE (8 * 1024 * 1024) #define THREAD_NAME_LEN (256) @@ -125,35 +122,6 @@ int __init main(int argc, char **argv, char **envp) char **new_argv; int ret, i, err; -#ifdef UML_CONFIG_CMDLINE_ON_HOST - /* Allocate memory for thread command lines */ - if(argc < 2 || strlen(argv[1]) < THREAD_NAME_LEN - 1){ - - char padding[THREAD_NAME_LEN] = { - [ 0 ... THREAD_NAME_LEN - 2] = ' ', '\0' - }; - - new_argv = malloc((argc + 2) * sizeof(char*)); - if(!new_argv) { - perror("Allocating extended argv"); - exit(1); - } - - new_argv[0] = argv[0]; - new_argv[1] = padding; - - for(i = 2; i <= argc; i++) - new_argv[i] = argv[i - 1]; - new_argv[argc + 1] = NULL; - - execvp(new_argv[0], new_argv); - perror("execing with extended args"); - exit(1); - } -#endif - - linux_prog = argv[0]; - set_stklim(); setup_env_path(); diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c index e9c14329751..d5fef4ce011 100644 --- a/arch/um/os-Linux/process.c +++ b/arch/um/os-Linux/process.c @@ -133,13 +133,6 @@ void os_kill_ptraced_process(int pid, int reap_child) CATCH_EINTR(waitpid(pid, NULL, 0)); } -#ifdef UML_CONFIG_MODE_TT -void os_usr1_process(int pid) -{ - kill(pid, SIGUSR1); -} -#endif - /* Don't use the glibc version, which caches the result in TLS. It misses some * syscalls, and also breaks with clone(), which does not unshare the TLS. */ @@ -239,30 +232,6 @@ out: return ok; } -#ifdef UML_CONFIG_MODE_TT -void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)) -{ - int flags = 0, pages; - - if(sig_stack != NULL){ - pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER); - set_sigstack(sig_stack, pages * UM_KERN_PAGE_SIZE); - flags = SA_ONSTACK; - } - if(usr1_handler){ - struct sigaction sa; - - sa.sa_handler = usr1_handler; - sigemptyset(&sa.sa_mask); - sa.sa_flags = flags; - sa.sa_restorer = NULL; - if(sigaction(SIGUSR1, &sa, NULL) < 0) - panic("init_new_thread_stack - sigaction failed - " - "errno = %d\n", errno); - } -} -#endif - void init_new_thread_signals(void) { set_handler(SIGSEGV, (__sighandler_t) sig_handler, SA_ONSTACK, diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index f4f2981f74b..acf52ea4ff5 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -35,12 +35,9 @@ #include "mode.h" #include "tempfile.h" #include "kern_constants.h" - -#ifdef UML_CONFIG_MODE_SKAS #include "skas.h" #include "skas_ptrace.h" #include "registers.h" -#endif static int ptrace_child(void *arg) { @@ -407,7 +404,6 @@ __uml_setup("noptraceldt", noptraceldt_cmd_param, " To support PTRACE_LDT, the host needs to be patched using\n" " the current skas3 patch.\n\n"); -#ifdef UML_CONFIG_MODE_SKAS static inline void check_skas3_ptrace_faultinfo(void) { struct ptrace_faultinfo fi; @@ -504,12 +500,6 @@ int can_do_skas(void) return 1; } -#else -int can_do_skas(void) -{ - return 0; -} -#endif int __init parse_iomem(char *str, int *add) { diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile index 37806621b25..dc7208f0b74 100644 --- a/arch/um/os-Linux/sys-i386/Makefile +++ b/arch/um/os-Linux/sys-i386/Makefile @@ -3,7 +3,7 @@ # Licensed under the GPL # -obj-$(CONFIG_MODE_SKAS) = registers.o signal.o tls.o +obj-y = registers.o signal.o tls.o USER_OBJS := $(obj-y) diff --git a/arch/um/os-Linux/sys-x86_64/Makefile b/arch/um/os-Linux/sys-x86_64/Makefile index eac8c0db300..a42a4ef02e1 100644 --- a/arch/um/os-Linux/sys-x86_64/Makefile +++ b/arch/um/os-Linux/sys-x86_64/Makefile @@ -3,7 +3,7 @@ # Licensed under the GPL # -obj-$(CONFIG_MODE_SKAS) = registers.o prctl.o signal.o +obj-y = registers.o prctl.o signal.o USER_OBJS := $(obj-y) diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c index 5de169b168f..5eb32d24ba5 100644 --- a/arch/um/os-Linux/time.c +++ b/arch/um/os-Linux/time.c @@ -30,13 +30,6 @@ int set_interval(int is_virtual) return 0; } -#ifdef UML_CONFIG_MODE_TT -void enable_timer(void) -{ - set_interval(1); -} -#endif - void disable_timer(void) { struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }}); @@ -71,18 +64,6 @@ void switch_timers(int to_real) errno); } -#ifdef UML_CONFIG_MODE_TT -void uml_idle_timer(void) -{ - if(signal(SIGVTALRM, SIG_IGN) == SIG_ERR) - panic("Couldn't unset SIGVTALRM handler"); - - set_handler(SIGALRM, (__sighandler_t) alarm_handler, - SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1); - set_interval(0); -} -#endif - unsigned long long os_nsecs(void) { struct timeval tv; diff --git a/arch/um/os-Linux/tls.c b/arch/um/os-Linux/tls.c index 16215b99080..282bd25e19e 100644 --- a/arch/um/os-Linux/tls.c +++ b/arch/um/os-Linux/tls.c @@ -8,11 +8,6 @@ /* TLS support - we basically rely on the host's one.*/ -/* In TT mode, this should be called only by the tracing thread, and makes sense - * only for PTRACE_SET_THREAD_AREA. In SKAS mode, it's used normally. - * - */ - #ifndef PTRACE_GET_THREAD_AREA #define PTRACE_GET_THREAD_AREA 25 #endif @@ -32,8 +27,6 @@ int os_set_thread_area(user_desc_t *info, int pid) return ret; } -#ifdef UML_CONFIG_MODE_SKAS - int os_get_thread_area(user_desc_t *info, int pid) { int ret; @@ -44,32 +37,3 @@ int os_get_thread_area(user_desc_t *info, int pid) ret = -errno; return ret; } - -#endif - -#ifdef UML_CONFIG_MODE_TT -#include "linux/unistd.h" - -int do_set_thread_area_tt(user_desc_t *info) -{ - int ret; - - ret = syscall(__NR_set_thread_area,info); - if (ret < 0) { - ret = -errno; - } - return ret; -} - -int do_get_thread_area_tt(user_desc_t *info) -{ - int ret; - - ret = syscall(__NR_get_thread_area,info); - if (ret < 0) { - ret = -errno; - } - return ret; -} - -#endif /* UML_CONFIG_MODE_TT */ diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules index bf23dd3e24d..61107b68e05 100644 --- a/arch/um/scripts/Makefile.rules +++ b/arch/um/scripts/Makefile.rules @@ -21,7 +21,7 @@ $(UNPROFILE_OBJS:.o=.%): \ $(UNPROFILE_OBJS) : CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ \ -Dunix -D__unix__ -D__$(SUBARCH)__ $(CF) -# The stubs and unmap.o can't try to call mcount or update basic block data +# The stubs can't try to call mcount or update basic block data define unprofile $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1))) endef diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index a4618b6b85b..94b6ede5ef6 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -1,8 +1,6 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ - ptrace_user.o setjmp.o signal.o sigcontext.o syscalls.o sysrq.o \ - sys_call_table.o tls.o - -obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o + ptrace_user.o setjmp.o signal.o sigcontext.o stub.o stub_segv.o \ + syscalls.o sysrq.o sys_call_table.o tls.o subarch-obj-y = lib/bitops_32.o lib/semaphore_32.o lib/string_32.o subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o @@ -13,11 +11,7 @@ USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o USER_OBJS += user-offsets.s extra-y += user-offsets.s -extra-$(CONFIG_MODE_TT) += unmap.o - UNPROFILE_OBJS := stub_segv.o CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING) include arch/um/scripts/Makefile.rules - -$(obj)/unmap.%: _c_flags = $(call unprofile,$(CFLAGS)) diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index a939a7ef022..762a12aec75 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -19,72 +19,6 @@ extern int modify_ldt(int func, void *ptr, unsigned long bytecount); -#ifdef CONFIG_MODE_TT - -static long do_modify_ldt_tt(int func, void __user *ptr, - unsigned long bytecount) -{ - struct user_desc info; - int res = 0; - void *buf = NULL; - void *p = NULL; /* What we pass to host. */ - - switch(func){ - case 1: - case 0x11: /* write_ldt */ - /* Do this check now to avoid overflows. */ - if (bytecount != sizeof(struct user_desc)) { - res = -EINVAL; - goto out; - } - - if(copy_from_user(&info, ptr, sizeof(info))) { - res = -EFAULT; - goto out; - } - - p = &info; - break; - case 0: - case 2: /* read_ldt */ - - /* The use of info avoids kmalloc on the write case, not on the - * read one. */ - buf = kmalloc(bytecount, GFP_KERNEL); - if (!buf) { - res = -ENOMEM; - goto out; - } - p = buf; - break; - default: - res = -ENOSYS; - goto out; - } - - res = modify_ldt(func, p, bytecount); - if(res < 0) - goto out; - - switch(func){ - case 0: - case 2: - /* Modify_ldt was for reading and returned the number of read - * bytes.*/ - if(copy_to_user(ptr, p, res)) - res = -EFAULT; - break; - } - -out: - kfree(buf); - return res; -} - -#endif - -#ifdef CONFIG_MODE_SKAS - #include "skas.h" #include "skas_ptrace.h" #include "asm/mmu_context.h" @@ -569,7 +503,6 @@ void free_ldt(struct mmu_context_skas * mm) } mm->ldt.entry_count = 0; } -#endif int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) { diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c index 28bf0115032..572fd504b94 100644 --- a/arch/um/sys-i386/ptrace.c +++ b/arch/um/sys-i386/ptrace.c @@ -14,12 +14,6 @@ #include "sysdep/sigcontext.h" #include "sysdep/sc.h" -void arch_switch_to_tt(struct task_struct *from, struct task_struct *to) -{ - update_debugregs(to->thread.arch.debugregs_seq); - arch_switch_tls_tt(from, to); -} - void arch_switch_to_skas(struct task_struct *from, struct task_struct *to) { int err = arch_switch_tls_skas(from, to); @@ -233,79 +227,12 @@ static inline unsigned long twd_fxsr_to_i387( struct i387_fxsave_struct *fxsave return ret; } -/* - * FXSR floating point environment conversions. - */ - -#ifdef CONFIG_MODE_TT -static inline int convert_fxsr_to_user_tt(struct _fpstate __user *buf, - struct pt_regs *regs) -{ - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned long env[7]; - struct _fpreg __user *to; - struct _fpxreg *from; - int i; - - env[0] = (unsigned long)fxsave->cwd | 0xffff0000; - env[1] = (unsigned long)fxsave->swd | 0xffff0000; - env[2] = twd_fxsr_to_i387(fxsave); - env[3] = fxsave->fip; - env[4] = fxsave->fcs | ((unsigned long)fxsave->fop << 16); - env[5] = fxsave->foo; - env[6] = fxsave->fos; - - if ( __copy_to_user( buf, env, 7 * sizeof(unsigned long) ) ) - return 1; - - to = &buf->_st[0]; - from = (struct _fpxreg *) &fxsave->st_space[0]; - for ( i = 0 ; i < 8 ; i++, to++, from++ ) { - if ( __copy_to_user( to, from, sizeof(*to) ) ) - return 1; - } - return 0; -} -#endif - static inline int convert_fxsr_to_user(struct _fpstate __user *buf, struct pt_regs *regs) { return(CHOOSE_MODE(convert_fxsr_to_user_tt(buf, regs), 0)); } -#ifdef CONFIG_MODE_TT -static inline int convert_fxsr_from_user_tt(struct pt_regs *regs, - struct _fpstate __user *buf) -{ - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned long env[7]; - struct _fpxreg *to; - struct _fpreg __user *from; - int i; - - if ( __copy_from_user( env, buf, 7 * sizeof(long) ) ) - return 1; - - fxsave->cwd = (unsigned short)(env[0] & 0xffff); - fxsave->swd = (unsigned short)(env[1] & 0xffff); - fxsave->twd = twd_i387_to_fxsr((unsigned short)(env[2] & 0xffff)); - fxsave->fip = env[3]; - fxsave->fop = (unsigned short)((env[4] & 0xffff0000) >> 16); - fxsave->fcs = (env[4] & 0xffff); - fxsave->foo = env[5]; - fxsave->fos = env[6]; - - to = (struct _fpxreg *) &fxsave->st_space[0]; - from = &buf->_st[0]; - for ( i = 0 ; i < 8 ; i++, to++, from++ ) { - if ( __copy_from_user( to, from, sizeof(*from) ) ) - return 1; - } - return 0; -} -#endif - static inline int convert_fxsr_from_user(struct pt_regs *regs, struct _fpstate __user *buf) { @@ -332,39 +259,11 @@ int set_fpregs(unsigned long buf, struct task_struct *child) else return(0); } -#ifdef CONFIG_MODE_TT -int get_fpxregs_tt(unsigned long buf, struct task_struct *tsk) -{ - struct pt_regs *regs = &tsk->thread.regs; - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - int err; - - err = __copy_to_user((void __user *) buf, fxsave, - sizeof(struct user_fxsr_struct)); - if(err) return -EFAULT; - else return 0; -} -#endif - int get_fpxregs(unsigned long buf, struct task_struct *tsk) { return(CHOOSE_MODE(get_fpxregs_tt(buf, tsk), 0)); } -#ifdef CONFIG_MODE_TT -int set_fpxregs_tt(unsigned long buf, struct task_struct *tsk) -{ - struct pt_regs *regs = &tsk->thread.regs; - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - int err; - - err = __copy_from_user(fxsave, (void __user *) buf, - sizeof(struct user_fxsr_struct) ); - if(err) return -EFAULT; - else return 0; -} -#endif - int set_fpxregs(unsigned long buf, struct task_struct *tsk) { return(CHOOSE_MODE(set_fpxregs_tt(buf, tsk), 0)); @@ -387,25 +286,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) } #endif -#ifdef CONFIG_MODE_TT -static inline void copy_fpu_fxsave_tt(struct pt_regs *regs, - struct user_i387_struct *buf) -{ - struct i387_fxsave_struct *fpu = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned short *to; - unsigned short *from; - int i; - - memcpy( buf, fpu, 7 * sizeof(long) ); - - to = (unsigned short *) &buf->st_space[0]; - from = (unsigned short *) &fpu->st_space[0]; - for ( i = 0 ; i < 8 ; i++, to += 5, from += 8 ) { - memcpy( to, from, 5 * sizeof(unsigned short) ); - } -} -#endif - static inline void copy_fpu_fxsave(struct pt_regs *regs, struct user_i387_struct *buf) { diff --git a/arch/um/sys-i386/ptrace_user.c b/arch/um/sys-i386/ptrace_user.c index 40ff0c831bd..b68dd230e64 100644 --- a/arch/um/sys-i386/ptrace_user.c +++ b/arch/um/sys-i386/ptrace_user.c @@ -43,89 +43,3 @@ int ptrace_setfpregs(long pid, unsigned long *regs) return -errno; return 0; } - -#ifdef UML_CONFIG_MODE_TT - -static void write_debugregs(int pid, unsigned long *regs) -{ - struct user *dummy; - int nregs, i; - - dummy = NULL; - nregs = ARRAY_SIZE(dummy->u_debugreg); - for(i = 0; i < nregs; i++){ - if((i == 4) || (i == 5)) continue; - if(ptrace(PTRACE_POKEUSR, pid, &dummy->u_debugreg[i], - regs[i]) < 0) - printk("write_debugregs - ptrace failed on " - "register %d, value = 0x%lx, errno = %d\n", i, - regs[i], errno); - } -} - -static void read_debugregs(int pid, unsigned long *regs) -{ - struct user *dummy; - int nregs, i; - - dummy = NULL; - nregs = ARRAY_SIZE(dummy->u_debugreg); - for(i = 0; i < nregs; i++){ - regs[i] = ptrace(PTRACE_PEEKUSR, pid, - &dummy->u_debugreg[i], 0); - } -} - -/* Accessed only by the tracing thread */ -static unsigned long kernel_debugregs[8] = { [ 0 ... 7 ] = 0 }; - -void arch_enter_kernel(void *task, int pid) -{ - read_debugregs(pid, TASK_DEBUGREGS(task)); - write_debugregs(pid, kernel_debugregs); -} - -void arch_leave_kernel(void *task, int pid) -{ - read_debugregs(pid, kernel_debugregs); - write_debugregs(pid, TASK_DEBUGREGS(task)); -} - -#ifdef UML_CONFIG_PT_PROXY -/* Accessed only by the tracing thread */ -static int debugregs_seq; - -/* Only called by the ptrace proxy */ -void ptrace_pokeuser(unsigned long addr, unsigned long data) -{ - if((addr < offsetof(struct user, u_debugreg[0])) || - (addr > offsetof(struct user, u_debugreg[7]))) - return; - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if(kernel_debugregs[addr] == data) return; - - kernel_debugregs[addr] = data; - debugregs_seq++; -} - -static void update_debugregs_cb(void *arg) -{ - int pid = *((int *) arg); - - write_debugregs(pid, kernel_debugregs); -} - -/* Optimized out in its header when not defined */ -void update_debugregs(int seq) -{ - int me; - - if(seq == debugregs_seq) return; - - me = os_getpid(); - initial_thread_cb(update_debugregs_cb, &me); -} -#endif - -#endif diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c index 1cbf95f6858..187ea27536b 100644 --- a/arch/um/sys-i386/signal.c +++ b/arch/um/sys-i386/signal.c @@ -13,9 +13,6 @@ #include "sigcontext.h" #include "registers.h" #include "mode.h" - -#ifdef CONFIG_MODE_SKAS - #include "skas.h" void copy_sc(union uml_pt_regs *regs, void *from) @@ -108,61 +105,6 @@ int copy_sc_to_user_skas(struct sigcontext __user *to, struct _fpstate __user *t return copy_to_user(to, &sc, sizeof(sc)) || copy_to_user(to_fp, fpregs, sizeof(fpregs)); } -#endif - -#ifdef CONFIG_MODE_TT - -/* These copy a sigcontext to/from userspace. They copy the fpstate pointer, - * blowing away the old, good one. So, that value is saved, and then restored - * after the sigcontext copy. In copy_from, the variable holding the saved - * fpstate pointer, and the sigcontext that it should be restored to are both - * in the kernel, so we can just restore using an assignment. In copy_to, the - * saved pointer is in the kernel, but the sigcontext is in userspace, so we - * copy_to_user it. - */ -int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext __user *from, - int fpsize) -{ - struct _fpstate *to_fp; - struct _fpstate __user *from_fp; - unsigned long sigs; - int err; - - to_fp = to->fpstate; - sigs = to->oldmask; - err = copy_from_user(to, from, sizeof(*to)); - from_fp = to->fpstate; - to->oldmask = sigs; - to->fpstate = to_fp; - if(to_fp != NULL) - err |= copy_from_user(to_fp, from_fp, fpsize); - return err; -} - -int copy_sc_to_user_tt(struct sigcontext __user *to, struct _fpstate __user *fp, - struct sigcontext *from, int fpsize, unsigned long sp) -{ - struct _fpstate __user *to_fp; - struct _fpstate *from_fp; - int err; - - to_fp = (fp ? fp : (struct _fpstate __user *) (to + 1)); - from_fp = from->fpstate; - err = copy_to_user(to, from, sizeof(*to)); - - /* The SP in the sigcontext is the updated one for the signal - * delivery. The sp passed in is the original, and this needs - * to be restored, so we stick it in separately. - */ - err |= copy_to_user(&SC_SP(to), &sp, sizeof(sp)); - - if(from_fp != NULL){ - err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate)); - err |= copy_to_user(to_fp, from_fp, fpsize); - } - return err; -} -#endif static int copy_sc_from_user(struct pt_regs *to, void __user *from) { diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c index fea8e5e15cc..0340b96d101 100644 --- a/arch/um/sys-i386/tls.c +++ b/arch/um/sys-i386/tls.c @@ -18,10 +18,7 @@ #include "mode_kern.h" #include "os.h" #include "mode.h" - -#ifdef CONFIG_MODE_SKAS #include "skas.h" -#endif /* * If needed we can detect when it's uninitialized. @@ -31,7 +28,6 @@ static int host_supports_tls = -1; int host_gdt_entry_tls_min; -#ifdef CONFIG_MODE_SKAS int do_set_thread_area_skas(struct user_desc *info) { int ret; @@ -53,7 +49,6 @@ int do_get_thread_area_skas(struct user_desc *info) put_cpu(); return ret; } -#endif /* * sys_get_thread_area: get a yet unused TLS descriptor index. @@ -187,17 +182,6 @@ int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to) return 0; } -int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to) -{ - if (!host_supports_tls) - return 0; - - if (needs_TLS_update(to)) - return load_TLS(0, to); - - return 0; -} - static int set_tls_entry(struct task_struct* task, struct user_desc *info, int idx, int flushed) { diff --git a/arch/um/sys-i386/unmap.c b/arch/um/sys-i386/unmap.c deleted file mode 100644 index 1b0ad0e4adc..00000000000 --- a/arch/um/sys-i386/unmap.c +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <linux/mman.h> -#include <asm/unistd.h> - -static int errno; - -static inline _syscall2(int,munmap,void *,start,size_t,len) -static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) -int switcheroo(int fd, int prot, void *from, void *to, int size) -{ - if(munmap(to, size) < 0){ - return(-1); - } - if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1 ){ - return(-1); - } - if(munmap(from, size) < 0){ - return(-1); - } - return(0); -} diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index ea8185d8540..002bb020f96 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -5,10 +5,9 @@ # obj-y = bug.o bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ - setjmp.o sigcontext.o signal.o syscalls.o syscall_table.o sysrq.o \ - ksyms.o tls.o + setjmp.o sigcontext.o signal.o stub.o stub_segv.o syscalls.o \ + syscall_table.o sysrq.o ksyms.o tls.o -obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o obj-$(CONFIG_MODULES) += um_module.o subarch-obj-y = lib/bitops_64.o lib/csum-partial_64.o lib/memcpy_64.o lib/thunk_64.o @@ -21,11 +20,7 @@ USER_OBJS := ptrace_user.o sigcontext.o USER_OBJS += user-offsets.s extra-y += user-offsets.s -extra-$(CONFIG_MODE_TT) += unmap.o - UNPROFILE_OBJS := stub_segv.o CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING) include arch/um/scripts/Makefile.rules - -$(obj)/unmap.%: _c_flags = $(call unprofile,$(CFLAGS)) diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c index fe8ec04d35b..c18d929e69b 100644 --- a/arch/um/sys-x86_64/signal.c +++ b/arch/um/sys-x86_64/signal.c @@ -15,9 +15,6 @@ #include "choose-mode.h" #include "sysdep/ptrace.h" #include "frame_kern.h" - -#ifdef CONFIG_MODE_SKAS - #include "skas.h" void copy_sc(union uml_pt_regs *regs, void *from) @@ -134,53 +131,6 @@ int copy_sc_to_user_skas(struct sigcontext __user *to, return(err); } -#endif - -#ifdef CONFIG_MODE_TT -int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext __user *from, - int fpsize) -{ - struct _fpstate *to_fp; - struct _fpstate __user *from_fp; - unsigned long sigs; - int err; - - to_fp = to->fpstate; - sigs = to->oldmask; - err = copy_from_user(to, from, sizeof(*to)); - from_fp = to->fpstate; - to->fpstate = to_fp; - to->oldmask = sigs; - if(to_fp != NULL) - err |= copy_from_user(to_fp, from_fp, fpsize); - return(err); -} - -int copy_sc_to_user_tt(struct sigcontext __user *to, struct _fpstate __user *fp, - struct sigcontext *from, int fpsize, unsigned long sp) -{ - struct _fpstate __user *to_fp; - struct _fpstate *from_fp; - int err; - - to_fp = (fp ? fp : (struct _fpstate __user *) (to + 1)); - from_fp = from->fpstate; - err = copy_to_user(to, from, sizeof(*to)); - /* The SP in the sigcontext is the updated one for the signal - * delivery. The sp passed in is the original, and this needs - * to be restored, so we stick it in separately. - */ - err |= copy_to_user(&SC_SP(to), &sp, sizeof(sp)); - - if(from_fp != NULL){ - err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate)); - err |= copy_to_user(to_fp, from_fp, fpsize); - } - return err; -} - -#endif - static int copy_sc_from_user(struct pt_regs *to, void __user *from) { int ret; diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c index b3f6350cac4..d0ff832c9ea 100644 --- a/arch/um/sys-x86_64/syscalls.c +++ b/arch/um/sys-x86_64/syscalls.c @@ -29,36 +29,6 @@ asmlinkage long sys_uname64(struct new_utsname __user * name) return err ? -EFAULT : 0; } -#ifdef CONFIG_MODE_TT -extern long arch_prctl(int code, unsigned long addr); - -static long arch_prctl_tt(int code, unsigned long addr) -{ - unsigned long tmp; - long ret; - - switch(code){ - case ARCH_SET_GS: - case ARCH_SET_FS: - ret = arch_prctl(code, addr); - break; - case ARCH_GET_FS: - case ARCH_GET_GS: - ret = arch_prctl(code, (unsigned long) &tmp); - if(!ret) - ret = put_user(tmp, (long __user *)addr); - break; - default: - ret = -EINVAL; - break; - } - - return(ret); -} -#endif - -#ifdef CONFIG_MODE_SKAS - long arch_prctl_skas(struct task_struct *task, int code, unsigned long __user *addr) { @@ -119,7 +89,6 @@ long arch_prctl_skas(struct task_struct *task, int code, return ret; } -#endif long sys_arch_prctl(int code, unsigned long addr) { diff --git a/arch/um/sys-x86_64/unmap.c b/arch/um/sys-x86_64/unmap.c deleted file mode 100644 index f4a4bffd8a1..00000000000 --- a/arch/um/sys-x86_64/unmap.c +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <linux/mman.h> -#include <asm/unistd.h> - -static int errno; - -static inline _syscall2(int,munmap,void *,start,size_t,len) -static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) -int switcheroo(int fd, int prot, void *from, void *to, int size) -{ - if(munmap(to, size) < 0){ - return(-1); - } - if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){ - return(-1); - } - if(munmap(from, size) < 0){ - return(-1); - } - return(0); -} |