From f0c4cad99c12f08cb2a6cd0255911b2a93c57707 Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Tue, 16 Oct 2007 01:27:18 -0700 Subject: uml: style fixes in FP code Tidy the code affected by the floating point fixes. A bunch of unused stuff is gone, including two sigcontext.c files, which turned out to be entirely unneeded. There are the usual fixes - whitespace and style cleanups copyright updates emacs formatting comments gone include cleanups adding severities to printks Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/sys-x86_64/Makefile | 6 +-- arch/um/sys-x86_64/ptrace.c | 101 ++++++++++++++++------------------------ arch/um/sys-x86_64/sigcontext.c | 39 ---------------- arch/um/sys-x86_64/signal.c | 23 +++++---- 4 files changed, 57 insertions(+), 112 deletions(-) delete mode 100644 arch/um/sys-x86_64/sigcontext.c (limited to 'arch/um/sys-x86_64') diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index 002bb020f96..3c22de53208 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -5,8 +5,8 @@ # 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 stub.o stub_segv.o syscalls.o \ - syscall_table.o sysrq.o ksyms.o tls.o + setjmp.o signal.o stub.o stub_segv.o syscalls.o syscall_table.o \ + sysrq.o ksyms.o tls.o obj-$(CONFIG_MODULES) += um_module.o @@ -15,7 +15,7 @@ subarch-obj-$(CONFIG_MODULES) += kernel/module_64.o ldt-y = ../sys-i386/ldt.o -USER_OBJS := ptrace_user.o sigcontext.o +USER_OBJS := ptrace_user.o USER_OBJS += user-offsets.s extra-y += user-offsets.s diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c index b9032992a99..a3cfeed17af 100644 --- a/arch/um/sys-x86_64/ptrace.c +++ b/arch/um/sys-x86_64/ptrace.c @@ -1,5 +1,6 @@ /* * Copyright 2003 PathScale, Inc. + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * * Licensed under the GPL */ @@ -12,17 +13,10 @@ #include #include -/* XXX x86_64 */ -unsigned long not_ss; -unsigned long not_ds; -unsigned long not_es; - -#define SC_SS(r) (not_ss) -#define SC_DS(r) (not_ds) -#define SC_ES(r) (not_es) - -/* determines which flags the user has access to. */ -/* 1 = access 0 = no access */ +/* + * determines which flags the user has access to. + * 1 = access 0 = no access + */ #define FLAG_MASK 0x44dd5UL int putreg(struct task_struct *child, int regno, unsigned long value) @@ -66,20 +60,21 @@ int putreg(struct task_struct *child, int regno, unsigned long value) int poke_user(struct task_struct *child, long addr, long data) { - if ((addr & 3) || addr < 0) - return -EIO; - - if (addr < MAX_REG_OFFSET) - return putreg(child, addr, data); - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if((addr == 4) || (addr == 5)) return -EIO; - child->thread.arch.debugregs[addr] = data; - return 0; - } - return -EIO; + if ((addr & 3) || addr < 0) + return -EIO; + + if (addr < MAX_REG_OFFSET) + return putreg(child, addr, data); + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))){ + addr -= offsetof(struct user, u_debugreg[0]); + addr = addr >> 2; + if ((addr == 4) || (addr == 5)) + return -EIO; + child->thread.arch.debugregs[addr] = data; + return 0; + } + return -EIO; } unsigned long getreg(struct task_struct *child, int regno) @@ -107,29 +102,22 @@ unsigned long getreg(struct task_struct *child, int regno) int peek_user(struct task_struct *child, long addr, long data) { /* read the word at location addr in the USER area. */ - unsigned long tmp; - - if ((addr & 3) || addr < 0) - return -EIO; - - tmp = 0; /* Default return condition */ - if(addr < MAX_REG_OFFSET){ - tmp = getreg(child, addr); - } - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - tmp = child->thread.arch.debugregs[addr]; - } - return put_user(tmp, (unsigned long *) data); -} + unsigned long tmp; -void arch_switch(void) -{ -/* XXX - printk("arch_switch\n"); -*/ + if ((addr & 3) || addr < 0) + return -EIO; + + tmp = 0; /* Default return condition */ + if (addr < MAX_REG_OFFSET){ + tmp = getreg(child, addr); + } + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))){ + addr -= offsetof(struct user, u_debugreg[0]); + addr = addr >> 2; + tmp = child->thread.arch.debugregs[addr]; + } + return put_user(tmp, (unsigned long *) data); } /* XXX Mostly copied from sys-i386 */ @@ -139,21 +127,21 @@ int is_syscall(unsigned long addr) int n; n = copy_from_user(&instr, (void __user *) addr, sizeof(instr)); - if(n){ + if (n){ /* access_process_vm() grants access to vsyscall and stub, * while copy_from_user doesn't. Maybe access_process_vm is * slow, but that doesn't matter, since it will be called only * in case of singlestepping, if copy_from_user failed. */ n = access_process_vm(current, addr, &instr, sizeof(instr), 0); - if(n != sizeof(instr)) { + if (n != sizeof(instr)) { printk("is_syscall : failed to read instruction from " "0x%lx\n", addr); - return(1); + return 1; } } /* sysenter */ - return(instr == 0x050f); + return instr == 0x050f; } int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) @@ -204,14 +192,3 @@ long subarch_ptrace(struct task_struct *child, long request, long addr, 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/sys-x86_64/sigcontext.c b/arch/um/sys-x86_64/sigcontext.c deleted file mode 100644 index c88e64def6f..00000000000 --- a/arch/um/sys-x86_64/sigcontext.c +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright 2003 PathScale, Inc. - * - * Licensed under the GPL - */ - -#include -#include -#include -#include "user.h" - -void sc_to_sc(void *to_ptr, void *from_ptr) -{ - struct sigcontext *to = to_ptr, *from = from_ptr; - int size = sizeof(*to); /* + sizeof(struct _fpstate); */ - - memcpy(to, from, size); - if(from->fpstate != NULL) - to->fpstate = (struct _fpstate *) (to + 1); - - to->fpstate = NULL; -} - -unsigned long *sc_sigmask(void *sc_ptr) -{ - struct sigcontext *sc = sc_ptr; - - return(&sc->oldmask); -} - -/* 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/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c index a8e5fd7b2ad..1778d33808f 100644 --- a/arch/um/sys-x86_64/signal.c +++ b/arch/um/sys-x86_64/signal.c @@ -1,5 +1,6 @@ /* * Copyright (C) 2003 PathScale, Inc. + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ @@ -110,7 +111,8 @@ static int copy_sc_to_user(struct sigcontext __user *to, err |= PUTREG(regs, RDI, to, rdi); err |= PUTREG(regs, RSI, to, rsi); err |= PUTREG(regs, RBP, to, rbp); - /* Must use orignal RSP, which is passed in, rather than what's in + /* + * Must use orignal RSP, which is passed in, rather than what's in * the pt_regs, because that's already been updated to point at the * signal frame. */ @@ -152,7 +154,7 @@ static int copy_sc_to_user(struct sigcontext __user *to, if (copy_to_user(to_fp, &fp, sizeof(struct user_i387_struct))) return 1; - return(err); + return err; } struct rt_sigframe @@ -188,7 +190,8 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, goto out; } - /* Update SP now because the page fault handler refuses to extend + /* + * Update SP now because the page fault handler refuses to extend * the stack if the faulting address is too far below the current * SP, which frame now certainly is. If there's an error, the original * value is restored on the way out. @@ -216,8 +219,10 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ + /* + * Set up to return from userspace. If provided, use a stub + * already in userspace. + */ /* x86-64 should always use SA_RESTORER. */ if (ka->sa.sa_flags & SA_RESTORER) err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); @@ -239,8 +244,10 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, /* In case the signal handler was declared without prototypes */ PT_REGS_RAX(regs) = 0; - /* This also works for non SA_SIGINFO handlers because they expect the - next argument after the signal number on the stack. */ + /* + * This also works for non SA_SIGINFO handlers because they expect the + * next argument after the signal number on the stack. + */ PT_REGS_RSI(regs) = (unsigned long) &frame->info; PT_REGS_RDX(regs) = (unsigned long) &frame->uc; PT_REGS_RIP(regs) = (unsigned long) ka->sa.sa_handler; @@ -276,7 +283,7 @@ long sys_rt_sigreturn(struct pt_regs *regs) /* Avoid ERESTART handling */ PT_REGS_SYSCALL_NR(¤t->thread.regs) = -1; - return(PT_REGS_SYSCALL_RET(¤t->thread.regs)); + return PT_REGS_SYSCALL_RET(¤t->thread.regs); segfault: force_sig(SIGSEGV, current); -- cgit v1.2.3