diff options
Diffstat (limited to 'arch/um/os-Linux/skas')
-rw-r--r-- | arch/um/os-Linux/skas/mem.c | 109 | ||||
-rw-r--r-- | arch/um/os-Linux/skas/process.c | 316 | ||||
-rw-r--r-- | arch/um/os-Linux/skas/trap.c | 51 |
3 files changed, 247 insertions, 229 deletions
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c index 0f7df4eb903..484e68f9f7a 100644 --- a/arch/um/os-Linux/skas/mem.c +++ b/arch/um/os-Linux/skas/mem.c @@ -1,31 +1,26 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <signal.h> +#include <stddef.h> +#include <unistd.h> #include <errno.h> #include <string.h> -#include <unistd.h> #include <sys/mman.h> -#include <sys/wait.h> -#include <asm/page.h> -#include <asm/unistd.h> -#include "mem_user.h" -#include "mem.h" -#include "skas.h" -#include "user.h" +#include "init.h" +#include "kern_constants.h" +#include "as-layout.h" +#include "mm_id.h" #include "os.h" #include "proc_mm.h" #include "ptrace_user.h" -#include "kern_util.h" -#include "task.h" #include "registers.h" -#include "uml-config.h" +#include "skas.h" +#include "user.h" #include "sysdep/ptrace.h" #include "sysdep/stub.h" -#include "init.h" -#include "kern_constants.h" +#include "uml-config.h" extern unsigned long batch_syscall_stub, __syscall_stub_start; @@ -34,7 +29,7 @@ extern void wait_stub_done(int pid); static inline unsigned long *check_init_stack(struct mm_id * mm_idp, unsigned long *stack) { - if(stack == NULL) { + if (stack == NULL) { stack = (unsigned long *) mm_idp->stack + 2; *stack = 0; } @@ -45,8 +40,8 @@ static unsigned long syscall_regs[MAX_REG_NR]; static int __init init_syscall_regs(void) { - get_safe_registers(syscall_regs, NULL); - syscall_regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + + get_safe_registers(syscall_regs); + syscall_regs[REGS_IP_INDEX] = STUB_CODE + ((unsigned long) &batch_syscall_stub - (unsigned long) &__syscall_stub_start); return 0; @@ -68,29 +63,30 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) unsigned long * syscall; int err, pid = mm_idp->u.pid; - if(proc_mm) + if (proc_mm) /* FIXME: Need to look up userspace_pid by cpu */ pid = userspace_pid[0]; multi_count++; n = ptrace_setregs(pid, syscall_regs); - if(n < 0){ - printk("Registers - \n"); - for(i = 0; i < MAX_REG_NR; i++) - printk("\t%d\t0x%lx\n", i, syscall_regs[i]); + if (n < 0) { + printk(UM_KERN_ERR "Registers - \n"); + for (i = 0; i < MAX_REG_NR; i++) + printk(UM_KERN_ERR "\t%d\t0x%lx\n", i, syscall_regs[i]); panic("do_syscall_stub : PTRACE_SETREGS failed, errno = %d\n", -n); } err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("Failed to continue stub, pid = %d, errno = %d\n", pid, errno); wait_stub_done(pid); - /* When the stub stops, we find the following values on the + /* + * When the stub stops, we find the following values on the * beginning of the stack: * (long )return_value * (long )offset to failed sycall-data (0, if no error) @@ -98,26 +94,26 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) ret = *((unsigned long *) mm_idp->stack); offset = *((unsigned long *) mm_idp->stack + 1); if (offset) { - data = (unsigned long *)(mm_idp->stack + - offset - UML_CONFIG_STUB_DATA); - printk("do_syscall_stub : ret = %ld, offset = %ld, " + data = (unsigned long *)(mm_idp->stack + offset - STUB_DATA); + printk(UM_KERN_ERR "do_syscall_stub : ret = %ld, offset = %ld, " "data = %p\n", ret, offset, data); syscall = (unsigned long *)((unsigned long)data + data[0]); - printk("do_syscall_stub: syscall %ld failed, return value = " - "0x%lx, expected return value = 0x%lx\n", + printk(UM_KERN_ERR "do_syscall_stub: syscall %ld failed, " + "return value = 0x%lx, expected return value = 0x%lx\n", syscall[0], ret, syscall[7]); - printk(" syscall parameters: " + printk(UM_KERN_ERR " syscall parameters: " "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n", syscall[1], syscall[2], syscall[3], syscall[4], syscall[5], syscall[6]); - for(n = 1; n < data[0]/sizeof(long); n++) { - if(n == 1) - printk(" additional syscall data:"); - if(n % 4 == 1) - printk("\n "); + for (n = 1; n < data[0]/sizeof(long); n++) { + if (n == 1) + printk(UM_KERN_ERR " additional syscall " + "data:"); + if (n % 4 == 1) + printk("\n" UM_KERN_ERR " "); printk(" 0x%lx", data[n]); } - if(n > 1) + if (n > 1) printk("\n"); } else ret = 0; @@ -133,7 +129,7 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall, { unsigned long *stack = check_init_stack(mm_idp, *addr); - if(done && *addr == NULL) + if (done && *addr == NULL) single_count++; *stack += sizeof(long); @@ -150,8 +146,8 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall, *stack = 0; multi_op_count++; - if(!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) < - UM_KERN_PAGE_SIZE - 10 * sizeof(long))){ + if (!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) < + UM_KERN_PAGE_SIZE - 10 * sizeof(long))) { *addr = stack; return 0; } @@ -166,14 +162,15 @@ long syscall_stub_data(struct mm_id * mm_idp, unsigned long *stack; int ret = 0; - /* If *addr still is uninitialized, it *must* contain NULL. + /* + * If *addr still is uninitialized, it *must* contain NULL. * Thus in this case do_syscall_stub correctly won't be called. */ - if((((unsigned long) *addr) & ~UM_KERN_PAGE_MASK) >= + if ((((unsigned long) *addr) & ~UM_KERN_PAGE_MASK) >= UM_KERN_PAGE_SIZE - (10 + data_count) * sizeof(long)) { ret = do_syscall_stub(mm_idp, addr); /* in case of error, don't overwrite data on stack */ - if(ret) + if (ret) return ret; } @@ -185,7 +182,7 @@ long syscall_stub_data(struct mm_id * mm_idp, memcpy(stack + 1, data, data_count * sizeof(long)); *stub_addr = (void *)(((unsigned long)(stack + 1) & - ~UM_KERN_PAGE_MASK) + UML_CONFIG_STUB_DATA); + ~UM_KERN_PAGE_MASK) + STUB_DATA); return 0; } @@ -195,7 +192,7 @@ int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, int prot, { int ret; - if(proc_mm){ + if (proc_mm) { struct proc_mm_op map; int fd = mm_idp->u.mm_fd; @@ -211,9 +208,10 @@ int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, int prot, .offset= offset } } } ); CATCH_EINTR(ret = write(fd, &map, sizeof(map))); - if(ret != sizeof(map)){ + if (ret != sizeof(map)) { ret = -errno; - printk("map : /proc/mm map failed, err = %d\n", -ret); + printk(UM_KERN_ERR "map : /proc/mm map failed, " + "err = %d\n", -ret); } else ret = 0; } @@ -234,7 +232,7 @@ int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, { int ret; - if(proc_mm){ + if (proc_mm) { struct proc_mm_op unmap; int fd = mm_idp->u.mm_fd; @@ -245,9 +243,10 @@ int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, (unsigned long) addr, .len = len } } } ); CATCH_EINTR(ret = write(fd, &unmap, sizeof(unmap))); - if(ret != sizeof(unmap)){ + if (ret != sizeof(unmap)) { ret = -errno; - printk("unmap - proc_mm write returned %d\n", ret); + printk(UM_KERN_ERR "unmap - proc_mm write returned " + "%d\n", ret); } else ret = 0; } @@ -268,7 +267,7 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, struct proc_mm_op protect; int ret; - if(proc_mm){ + if (proc_mm) { int fd = mm_idp->u.mm_fd; protect = ((struct proc_mm_op) { .op = MM_MPROTECT, @@ -280,9 +279,9 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, .prot = prot } } } ); CATCH_EINTR(ret = write(fd, &protect, sizeof(protect))); - if(ret != sizeof(protect)){ + if (ret != sizeof(protect)) { ret = -errno; - printk("protect failed, err = %d", -ret); + printk(UM_KERN_ERR "protect failed, err = %d", -ret); } else ret = 0; } @@ -295,7 +294,3 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, return ret; } - -void before_mem_skas(unsigned long unused) -{ -} diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index ba9af8d6205..d77c81d7068 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -1,48 +1,38 @@ /* - * Copyright (C) 2002- 2004 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2002- 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <stdlib.h> -#include <string.h> #include <unistd.h> -#include <errno.h> -#include <signal.h> #include <sched.h> -#include "ptrace_user.h" -#include <sys/wait.h> +#include <errno.h> +#include <string.h> #include <sys/mman.h> -#include <sys/user.h> -#include <sys/time.h> -#include <sys/syscall.h> -#include <asm/types.h> -#include "user.h" -#include "sysdep/ptrace.h" -#include "kern_util.h" -#include "skas.h" -#include "stub-data.h" -#include "mm_id.h" -#include "sysdep/sigcontext.h" -#include "sysdep/stub.h" -#include "os.h" -#include "proc_mm.h" -#include "skas_ptrace.h" +#include <sys/ptrace.h> +#include <sys/wait.h> +#include <asm/unistd.h> +#include "as-layout.h" #include "chan_user.h" -#include "registers.h" +#include "kern_constants.h" #include "mem.h" -#include "uml-config.h" +#include "os.h" #include "process.h" -#include "longjmp.h" -#include "kern_constants.h" -#include "as-layout.h" +#include "proc_mm.h" +#include "ptrace_user.h" +#include "registers.h" +#include "skas.h" +#include "skas_ptrace.h" +#include "user.h" +#include "sysdep/stub.h" int is_skas_winch(int pid, int fd, void *data) { - if(pid != os_getpgrp()) - return(0); + if (pid != getpgrp()) + return 0; register_winch_irq(-1, fd, -1, data, 0); - return(1); + return 1; } static int ptrace_dump_regs(int pid) @@ -50,13 +40,12 @@ static int ptrace_dump_regs(int pid) unsigned long regs[MAX_REG_NR]; int i; - if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) + if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) return -errno; - else { - printk("Stub registers -\n"); - for(i = 0; i < ARRAY_SIZE(regs); i++) - printk("\t%d - %lx\n", i, regs[i]); - } + + printk(UM_KERN_ERR "Stub registers -\n"); + for (i = 0; i < ARRAY_SIZE(regs); i++) + printk(UM_KERN_ERR "\t%d - %lx\n", i, regs[i]); return 0; } @@ -74,27 +63,28 @@ void wait_stub_done(int pid) { int n, status, err; - while(1){ + while (1) { CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if((n < 0) || !WIFSTOPPED(status)) + if ((n < 0) || !WIFSTOPPED(status)) goto bad_wait; - if(((1 << WSTOPSIG(status)) & STUB_SIG_MASK) == 0) + if (((1 << WSTOPSIG(status)) & STUB_SIG_MASK) == 0) break; err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("wait_stub_done : continue failed, errno = %d\n", errno); } - if(((1 << WSTOPSIG(status)) & STUB_DONE_MASK) != 0) + if (((1 << WSTOPSIG(status)) & STUB_DONE_MASK) != 0) return; bad_wait: err = ptrace_dump_regs(pid); - if(err) - printk("Failed to get registers from stub, errno = %d\n", -err); + if (err) + printk(UM_KERN_ERR "Failed to get registers from stub, " + "errno = %d\n", -err); panic("wait_stub_done : failed to wait for SIGUSR1/SIGTRAP, pid = %d, " "n = %d, errno = %d, status = 0x%x\n", pid, n, errno, status); } @@ -105,9 +95,9 @@ void get_skas_faultinfo(int pid, struct faultinfo * fi) { int err; - if(ptrace_faultinfo){ + if (ptrace_faultinfo) { err = ptrace(PTRACE_FAULTINFO, pid, 0, fi); - if(err) + if (err) panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, " "errno = %d\n", errno); @@ -119,52 +109,57 @@ void get_skas_faultinfo(int pid, struct faultinfo * fi) } else { err = ptrace(PTRACE_CONT, pid, 0, SIGSEGV); - if(err) + if (err) panic("Failed to continue stub, pid = %d, errno = %d\n", pid, errno); wait_stub_done(pid); - /* faultinfo is prepared by the stub-segv-handler at start of + /* + * faultinfo is prepared by the stub-segv-handler at start of * the stub stack page. We just have to copy it. */ memcpy(fi, (void *)current_stub_stack(), sizeof(*fi)); } } -static void handle_segv(int pid, union uml_pt_regs * regs) +static void handle_segv(int pid, struct uml_pt_regs * regs) { - get_skas_faultinfo(pid, ®s->skas.faultinfo); - segv(regs->skas.faultinfo, 0, 1, NULL); + get_skas_faultinfo(pid, ®s->faultinfo); + segv(regs->faultinfo, 0, 1, NULL); } -/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/ -static void handle_trap(int pid, union uml_pt_regs *regs, int local_using_sysemu) +/* + * To use the same value of using_sysemu as the caller, ask it that value + * (in local_using_sysemu + */ +static void handle_trap(int pid, struct uml_pt_regs *regs, + int local_using_sysemu) { int err, status; /* Mark this as a syscall */ - UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->skas.regs); + UPT_SYSCALL_NR(regs) = PT_SYSCALL_NR(regs->gp); if (!local_using_sysemu) { err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_getpid); - if(err < 0) - panic("handle_trap - nullifying syscall failed errno = %d\n", - errno); + if (err < 0) + panic("handle_trap - nullifying syscall failed, " + "errno = %d\n", errno); err = ptrace(PTRACE_SYSCALL, pid, 0, 0); - if(err < 0) - panic("handle_trap - continuing to end of syscall failed, " - "errno = %d\n", errno); + if (err < 0) + panic("handle_trap - continuing to end of syscall " + "failed, errno = %d\n", errno); CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if((err < 0) || !WIFSTOPPED(status) || - (WSTOPSIG(status) != SIGTRAP + 0x80)){ + if ((err < 0) || !WIFSTOPPED(status) || + (WSTOPSIG(status) != SIGTRAP + 0x80)) { err = ptrace_dump_regs(pid); - if(err) - printk("Failed to get registers from process, " - "errno = %d\n", -err); + if (err) + printk(UM_KERN_ERR "Failed to get registers " + "from process, errno = %d\n", -err); panic("handle_trap - failed to wait at end of syscall, " "errno = %d, status = %d\n", errno, status); } @@ -182,63 +177,64 @@ static int userspace_tramp(void *stack) ptrace(PTRACE_TRACEME, 0, 0, 0); - init_new_thread_signals(); - err = set_interval(1); - if(err) + signal(SIGTERM, SIG_DFL); + err = set_interval(); + if (err) panic("userspace_tramp - setting timer failed, errno = %d\n", err); - if(!proc_mm){ - /* This has a pte, but it can't be mapped in with the usual + if (!proc_mm) { + /* + * This has a pte, but it can't be mapped in with the usual * tlb_flush mechanism because this is part of that mechanism */ int fd; - __u64 offset; + unsigned long long offset; fd = phys_mapping(to_phys(&__syscall_stub_start), &offset); - addr = mmap64((void *) UML_CONFIG_STUB_CODE, UM_KERN_PAGE_SIZE, + addr = mmap64((void *) STUB_CODE, UM_KERN_PAGE_SIZE, PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset); - if(addr == MAP_FAILED){ - printk("mapping mmap stub failed, errno = %d\n", - errno); + if (addr == MAP_FAILED) { + printk(UM_KERN_ERR "mapping mmap stub at 0x%lx failed, " + "errno = %d\n", STUB_CODE, errno); exit(1); } - if(stack != NULL){ + if (stack != NULL) { fd = phys_mapping(to_phys(stack), &offset); - addr = mmap((void *) UML_CONFIG_STUB_DATA, + addr = mmap((void *) STUB_DATA, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, fd, offset); - if(addr == MAP_FAILED){ - printk("mapping segfault stack failed, " - "errno = %d\n", errno); + if (addr == MAP_FAILED) { + printk(UM_KERN_ERR "mapping segfault stack " + "at 0x%lx failed, errno = %d\n", + STUB_DATA, errno); exit(1); } } } - if(!ptrace_faultinfo && (stack != NULL)){ + if (!ptrace_faultinfo && (stack != NULL)) { struct sigaction sa; - unsigned long v = UML_CONFIG_STUB_CODE + + unsigned long v = STUB_CODE + (unsigned long) stub_segv_handler - (unsigned long) &__syscall_stub_start; - set_sigstack((void *) UML_CONFIG_STUB_DATA, UM_KERN_PAGE_SIZE); + set_sigstack((void *) STUB_DATA, UM_KERN_PAGE_SIZE); sigemptyset(&sa.sa_mask); sigaddset(&sa.sa_mask, SIGIO); sigaddset(&sa.sa_mask, SIGWINCH); - sigaddset(&sa.sa_mask, SIGALRM); sigaddset(&sa.sa_mask, SIGVTALRM); sigaddset(&sa.sa_mask, SIGUSR1); sa.sa_flags = SA_ONSTACK; sa.sa_handler = (void *) v; sa.sa_restorer = NULL; - if(sigaction(SIGSEGV, &sa, NULL) < 0) + if (sigaction(SIGSEGV, &sa, NULL) < 0) panic("userspace_tramp - setting SIGSEGV handler " "failed - errno = %d\n", errno); } - os_stop_process(os_getpid()); - return(0); + kill(os_getpid(), SIGSTOP); + return 0; } /* Each element set once, and only accessed by a single processor anyway */ @@ -255,44 +251,55 @@ int start_userspace(unsigned long stub_stack) stack = mmap(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if(stack == MAP_FAILED) + if (stack == MAP_FAILED) panic("start_userspace : mmap failed, errno = %d", errno); sp = (unsigned long) stack + UM_KERN_PAGE_SIZE - sizeof(void *); flags = CLONE_FILES | SIGCHLD; - if(proc_mm) flags |= CLONE_VM; + if (proc_mm) + flags |= CLONE_VM; + pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack); - if(pid < 0) + if (pid < 0) panic("start_userspace : clone failed, errno = %d", errno); do { CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) + if (n < 0) panic("start_userspace : wait failed, errno = %d", errno); - } while(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM)); + } while (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM)); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) + if (!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) panic("start_userspace : expected SIGSTOP, got status = %d", status); - if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, (void *)PTRACE_O_TRACESYSGOOD) < 0) - panic("start_userspace : PTRACE_OLDSETOPTIONS failed, errno=%d\n", - errno); + if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, + (void *) PTRACE_O_TRACESYSGOOD) < 0) + panic("start_userspace : PTRACE_OLDSETOPTIONS failed, " + "errno = %d\n", errno); - if(munmap(stack, UM_KERN_PAGE_SIZE) < 0) + if (munmap(stack, UM_KERN_PAGE_SIZE) < 0) panic("start_userspace : munmap failed, errno = %d\n", errno); - return(pid); + return pid; } -void userspace(union uml_pt_regs *regs) +void userspace(struct uml_pt_regs *regs) { + struct itimerval timer; + unsigned long long nsecs, now; int err, status, op, pid = userspace_pid[0]; /* To prevent races if using_sysemu changes under us.*/ int local_using_sysemu; - while(1){ + if (getitimer(ITIMER_VIRTUAL, &timer)) + printk("Failed to get itimer, errno = %d\n", errno); + nsecs = timer.it_value.tv_sec * UM_NSEC_PER_SEC + + timer.it_value.tv_usec * UM_NSEC_PER_USEC; + nsecs += os_nsecs(); + + while (1) { restore_registers(pid, regs); /* Now we set local_using_sysemu to be used for one loop */ @@ -302,26 +309,28 @@ void userspace(union uml_pt_regs *regs) singlestepping(NULL)); err = ptrace(op, pid, 0, 0); - if(err) + if (err) panic("userspace - could not resume userspace process, " "pid=%d, ptrace operation = %d, errno = %d\n", pid, op, errno); CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if(err < 0) + if (err < 0) panic("userspace - waitpid failed, errno = %d\n", errno); - regs->skas.is_user = 1; + regs->is_user = 1; save_registers(pid, regs); UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */ - if(WIFSTOPPED(status)){ + if (WIFSTOPPED(status)) { int sig = WSTOPSIG(status); - switch(sig){ + switch(sig) { case SIGSEGV: - if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo){ - get_skas_faultinfo(pid, ®s->skas.faultinfo); + if (PTRACE_FULL_FAULTINFO || + !ptrace_faultinfo) { + get_skas_faultinfo(pid, + ®s->faultinfo); (*sig_info[SIGSEGV])(SIGSEGV, regs); } else handle_segv(pid, regs); @@ -332,8 +341,20 @@ void userspace(union uml_pt_regs *regs) case SIGTRAP: relay_signal(SIGTRAP, regs); break; - case SIGIO: case SIGVTALRM: + now = os_nsecs(); + if(now < nsecs) + break; + block_signals(); + (*sig_info[sig])(sig, regs); + unblock_signals(); + nsecs = timer.it_value.tv_sec * + UM_NSEC_PER_SEC + + timer.it_value.tv_usec * + UM_NSEC_PER_USEC; + nsecs += os_nsecs(); + break; + case SIGIO: case SIGILL: case SIGBUS: case SIGFPE: @@ -343,30 +364,29 @@ void userspace(union uml_pt_regs *regs) unblock_signals(); break; default: - printk("userspace - child stopped with signal " - "%d\n", sig); + printk(UM_KERN_ERR "userspace - child stopped " + "with signal %d\n", sig); } pid = userspace_pid[0]; interrupt_end(); /* Avoid -ERESTARTSYS handling in host */ - if(PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET) - PT_SYSCALL_NR(regs->skas.regs) = -1; + if (PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET) + PT_SYSCALL_NR(regs->gp) = -1; } } } static unsigned long thread_regs[MAX_REG_NR]; -static unsigned long thread_fp_regs[HOST_FP_SIZE]; static int __init init_thread_regs(void) { - get_safe_registers(thread_regs, thread_fp_regs); + get_safe_registers(thread_regs); /* Set parent's instruction pointer to start of clone-stub */ - thread_regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + + thread_regs[REGS_IP_INDEX] = STUB_CODE + (unsigned long) stub_clone_handler - (unsigned long) &__syscall_stub_start; - thread_regs[REGS_SP_INDEX] = UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE - + thread_regs[REGS_SP_INDEX] = STUB_DATA + UM_KERN_PAGE_SIZE - sizeof(void *); #ifdef __SIGNAL_FRAMESIZE thread_regs[REGS_SP_INDEX] -= __SIGNAL_FRAMESIZE; @@ -378,53 +398,53 @@ __initcall(init_thread_regs); int copy_context_skas0(unsigned long new_stack, int pid) { + struct timeval tv = { .tv_sec = 0, .tv_usec = UM_USEC_PER_SEC / UM_HZ }; int err; unsigned long current_stack = current_stub_stack(); struct stub_data *data = (struct stub_data *) current_stack; struct stub_data *child_data = (struct stub_data *) new_stack; - __u64 new_offset; + unsigned long long new_offset; int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset); - /* prepare offset and fd of child's stack as argument for parent's + /* + * prepare offset and fd of child's stack as argument for parent's * and child's mmap2 calls */ *data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset), .fd = new_fd, .timer = ((struct itimerval) - { { 0, 1000000 / hz() }, - { 0, 1000000 / hz() }})}); + { .it_value = tv, + .it_interval = tv }) }); + err = ptrace_setregs(pid, thread_regs); - if(err < 0) + if (err < 0) panic("copy_context_skas0 : PTRACE_SETREGS failed, " "pid = %d, errno = %d\n", pid, -err); - err = ptrace_setfpregs(pid, thread_fp_regs); - if(err < 0) - panic("copy_context_skas0 : PTRACE_SETFPREGS failed, " - "pid = %d, errno = %d\n", pid, -err); - /* set a well known return code for detection of child write failure */ child_data->err = 12345678; - /* Wait, until parent has finished its work: read child's pid from + /* + * Wait, until parent has finished its work: read child's pid from * parent's stack, and check, if bad result. */ err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("Failed to continue new process, pid = %d, " "errno = %d\n", pid, errno); wait_stub_done(pid); pid = data->err; - if(pid < 0) + if (pid < 0) panic("copy_context_skas0 - stub-parent reports error %d\n", -pid); - /* Wait, until child has finished too: read child's result from + /* + * Wait, until child has finished too: read child's result from * child's stack and check it. */ wait_stub_done(pid); - if (child_data->err != UML_CONFIG_STUB_DATA) + if (child_data->err != STUB_DATA) panic("copy_context_skas0 - stub-child reports error %ld\n", child_data->err); @@ -446,7 +466,7 @@ void map_stub_pages(int fd, unsigned long code, { struct proc_mm_op mmop; int n; - __u64 code_offset; + unsigned long long code_offset; int code_fd = phys_mapping(to_phys((void *) &__syscall_stub_start), &code_offset); @@ -461,16 +481,17 @@ void map_stub_pages(int fd, unsigned long code, .offset = code_offset } } }); CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop))); - if(n != sizeof(mmop)){ + if (n != sizeof(mmop)) { n = errno; - printk("mmap args - addr = 0x%lx, fd = %d, offset = %llx\n", - code, code_fd, (unsigned long long) code_offset); + printk(UM_KERN_ERR "mmap args - addr = 0x%lx, fd = %d, " + "offset = %llx\n", code, code_fd, + (unsigned long long) code_offset); panic("map_stub_pages : /proc/mm map for code failed, " "err = %d\n", n); } - if ( stack ) { - __u64 map_offset; + if (stack) { + unsigned long long map_offset; int map_fd = phys_mapping(to_phys((void *)stack), &map_offset); mmop = ((struct proc_mm_op) { .op = MM_MMAP, @@ -484,7 +505,7 @@ void map_stub_pages(int fd, unsigned long code, .offset = map_offset } } }); CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop))); - if(n != sizeof(mmop)) + if (n != sizeof(mmop)) panic("map_stub_pages : /proc/mm map for data failed, " "err = %d\n", errno); } @@ -504,7 +525,7 @@ void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)) void switch_threads(jmp_buf *me, jmp_buf *you) { - if(UML_SETJMP(me) == 0) + if (UML_SETJMP(me) == 0) UML_LONGJMP(you, 1); } @@ -520,8 +541,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf) int n; set_handler(SIGWINCH, (__sighandler_t) sig_handler, - SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM, - SIGVTALRM, -1); + SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGVTALRM, -1); /* * Can't use UML_SETJMP or UML_LONGJMP here because they save @@ -532,7 +552,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf) * after returning to the jumper. */ n = setjmp(initial_jmpbuf); - switch(n){ + switch(n) { case INIT_JMP_NEW_THREAD: (*switch_buf)[0].JB_IP = (unsigned long) new_thread_handler; (*switch_buf)[0].JB_SP = (unsigned long) stack + @@ -544,10 +564,10 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf) break; case INIT_JMP_HALT: kmalloc_ok = 0; - return(0); + return 0; case INIT_JMP_REBOOT: kmalloc_ok = 0; - return(1); + return 1; default: panic("Bad sigsetjmp return in start_idle_thread - %d\n", n); } @@ -563,7 +583,7 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg) cb_back = &here; block_signals(); - if(UML_SETJMP(&here) == 0) + if (UML_SETJMP(&here) == 0) UML_LONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK); unblock_signals(); @@ -584,16 +604,16 @@ void reboot_skas(void) UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT); } -void switch_mm_skas(struct mm_id *mm_idp) +void __switch_mm(struct mm_id *mm_idp) { int err; - /* FIXME: need cpu pid in switch_mm_skas */ - if(proc_mm){ + /* FIXME: need cpu pid in __switch_mm */ + if (proc_mm) { err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0, mm_idp->u.mm_fd); - if(err) - panic("switch_mm_skas - PTRACE_SWITCH_MM failed, " + if (err) + panic("__switch_mm - PTRACE_SWITCH_MM failed, " "errno = %d\n", errno); } else userspace_pid[0] = mm_idp->u.pid; diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c index 3b600c2e63b..3b1b9244f46 100644 --- a/arch/um/os-Linux/skas/trap.c +++ b/arch/um/os-Linux/skas/trap.c @@ -1,37 +1,43 @@ /* - * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <signal.h> -#include <errno.h> +#if 0 #include "kern_util.h" -#include "as-layout.h" -#include "task.h" -#include "sigcontext.h" #include "skas.h" #include "ptrace_user.h" -#include "sysdep/ptrace.h" #include "sysdep/ptrace_user.h" +#endif + +#include <errno.h> +#include <signal.h> +#include "sysdep/ptrace.h" +#include "kern_constants.h" +#include "as-layout.h" #include "os.h" +#include "sigcontext.h" +#include "task.h" -static union uml_pt_regs ksig_regs[UM_NR_CPUS]; +static struct uml_pt_regs ksig_regs[UM_NR_CPUS]; void sig_handler_common_skas(int sig, void *sc_ptr) { struct sigcontext *sc = sc_ptr; - union uml_pt_regs *r; - void (*handler)(int, union uml_pt_regs *); + struct uml_pt_regs *r; + void (*handler)(int, struct uml_pt_regs *); int save_user, save_errno = errno; - /* This is done because to allow SIGSEGV to be delivered inside a SEGV + /* + * 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. * XXX Figure out why this is better than SA_NODEFER */ - if(sig == SIGSEGV) { + if (sig == SIGSEGV) { change_sig(SIGSEGV, 1); - /* For segfaults, we want the data from the + /* + * For segfaults, we want the data from the * sigcontext. In this case, we don't want to mangle * the process registers, so use a static set of * registers. For other signals, the process @@ -42,25 +48,22 @@ void sig_handler_common_skas(int sig, void *sc_ptr) } else r = TASK_REGS(get_current()); - save_user = r->skas.is_user; - r->skas.is_user = 0; - if ( sig == SIGFPE || sig == SIGSEGV || - sig == SIGBUS || sig == SIGILL || - sig == SIGTRAP ) { - GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc); - } + save_user = r->is_user; + r->is_user = 0; + if ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) || + (sig == SIGILL) || (sig == SIGTRAP)) + GET_FAULTINFO_FROM_SC(r->faultinfo, sc); change_sig(SIGUSR1, 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 SIGVTALRM, SIGIO if sig isn't IRQ signal */ + if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM)) unblock_signals(); handler(sig, r); errno = save_errno; - r->skas.is_user = save_user; + r->is_user = save_user; } |