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Commit 81e7009e authored by Stephen Rothwell's avatar Stephen Rothwell
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powerpc: merge ppc signal.c and ppc64 signal32.c 

Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
parent 55d36339
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arch/powerpc/kernel/Makefile
View file @ 81e7009e
......@@ -10,7 +10,7 @@ CFLAGS_prom_init.o += -fPIC
CFLAGS_btext.o += -fPIC
endif
obj-y := semaphore.o cputable.o ptrace.o
obj-y := semaphore.o cputable.o ptrace.o signal_32.o
obj-$(CONFIG_PPC64) += binfmt_elf32.o sys_ppc32.o
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_POWER4) += idle_power4.o
......
arch/ppc64/kernel/signal32.c → arch/powerpc/kernel/signal_32.c
View file @ 81e7009e
/*
* signal32.c: Support 32bit signal syscalls.
* Signal handling for 32bit PPC and 32bit tasks on 64bit PPC
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
* Copyright (C) 2001 IBM
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment.
* Derived from "arch/i386/kernel/signal.c"
* Copyright (C) 1991, 1992 Linus Torvalds
* 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
#include <linux/errno.h>
#include <linux/elf.h>
#ifdef CONFIG_PPC64
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <linux/ptrace.h>
#include <asm/ppc32.h>
#else
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/suspend.h>
#endif
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#ifdef CONFIG_PPC64
#include <asm/ppc32.h>
#include <asm/ppcdebug.h>
#include <asm/unistd.h>
#include <asm/cacheflush.h>
#include <asm/vdso.h>
#else
#include <asm/ucontext.h>
#include <asm/pgtable.h>
#endif
#define DEBUG_SIG 0
#undef DEBUG_SIG
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
#define GP_REGS_SIZE32 min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
#ifdef CONFIG_PPC64
#define do_signal do_signal32
#define sys_sigsuspend sys32_sigsuspend
#define sys_rt_sigsuspend sys32_rt_sigsuspend
#define sys_rt_sigreturn sys32_rt_sigreturn
#define sys_sigaction sys32_sigaction
#define sys_swapcontext sys32_swapcontext
#define sys_sigreturn sys32_sigreturn
#define old_sigaction old_sigaction32
#define sigcontext sigcontext32
#define mcontext mcontext32
#define ucontext ucontext32
/*
* Returning 0 means we return to userspace via
* ret_from_except and thus restore all user
* registers from *regs. This is what we need
* to do when a signal has been delivered.
*/
#define sigreturn_exit(regs) return 0
#define GP_REGS_SIZE min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
#undef __SIGNAL_FRAMESIZE
#define __SIGNAL_FRAMESIZE __SIGNAL_FRAMESIZE32
#undef ELF_NVRREG
#define ELF_NVRREG ELF_NVRREG32
/*
* Functions for flipping sigsets (thanks to brain dead generic
* implementation that makes things simple for little endian only)
*/
static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
{
compat_sigset_t cset;
switch (_NSIG_WORDS) {
case 4: cset.sig[5] = set->sig[3] & 0xffffffffull;
cset.sig[7] = set->sig[3] >> 32;
case 3: cset.sig[4] = set->sig[2] & 0xffffffffull;
cset.sig[5] = set->sig[2] >> 32;
case 2: cset.sig[2] = set->sig[1] & 0xffffffffull;
cset.sig[3] = set->sig[1] >> 32;
case 1: cset.sig[0] = set->sig[0] & 0xffffffffull;
cset.sig[1] = set->sig[0] >> 32;
}
return copy_to_user(uset, &cset, sizeof(*uset));
}
static inline int get_sigset_t(sigset_t *set, compat_sigset_t __user *uset)
{
compat_sigset_t s32;
if (copy_from_user(&s32, uset, sizeof(*uset)))
return -EFAULT;
/*
* Swap the 2 words of the 64-bit sigset_t (they are stored
* in the "wrong" endian in 32-bit user storage).
*/
switch (_NSIG_WORDS) {
case 4: set->sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
case 3: set->sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
case 2: set->sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
case 1: set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
}
return 0;
}
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka->sa.sa_handler = compat_ptr(handler);
new_ka->sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
static inline compat_uptr_t to_user_ptr(void *kp)
{
return (compat_uptr_t)(u64)kp;
}
#define from_user_ptr(p) compat_ptr(p)
static inline int save_general_regs(struct pt_regs *regs,
struct mcontext __user *frame)
{
elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
int i;
for (i = 0; i <= PT_RESULT; i ++)
if (__put_user((unsigned int)gregs[i], &frame->mc_gregs[i]))
return -EFAULT;
return 0;
}
static inline int restore_general_regs(struct pt_regs *regs,
struct mcontext __user *sr)
{
elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
int i;
for (i = 0; i <= PT_RESULT; i++) {
if ((i == PT_MSR) || (i == PT_SOFTE))
continue;
if (__get_user(gregs[i], &sr->mc_gregs[i]))
return -EFAULT;
}
return 0;
}
#else /* CONFIG_PPC64 */
extern void sigreturn_exit(struct pt_regs *);
#define GP_REGS_SIZE min(sizeof(elf_gregset_t), sizeof(struct pt_regs))
static inline int put_sigset_t(sigset_t __user *uset, sigset_t *set)
{
return copy_to_user(uset, set, sizeof(*uset));
}
static inline int get_sigset_t(sigset_t *set, sigset_t __user *uset)
{
return copy_from_user(set, uset, sizeof(*uset));
}
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka->sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka->sa.sa_restorer, &act->sa_restorer))
return -EFAULT;
__get_user(new_ka->sa.sa_flags, &act->sa_flags);
__get_user(mask, &act->sa_mask);
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
#define to_user_ptr(p) (p)
#define from_user_ptr(p) (p)
static inline int save_general_regs(struct pt_regs *regs,
struct mcontext __user *frame)
{
return __copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE);
}
static inline int restore_general_regs(struct pt_regs *regs,
struct mcontext __user *sr)
{
/* copy up to but not including MSR */
if (__copy_from_user(regs, &sr->mc_gregs,
PT_MSR * sizeof(elf_greg_t)))
return -EFAULT;
/* copy from orig_r3 (the word after the MSR) up to the end */
if (__copy_from_user(&regs->orig_gpr3, &sr->mc_gregs[PT_ORIG_R3],
GP_REGS_SIZE - PT_ORIG_R3 * sizeof(elf_greg_t)))
return -EFAULT;
return 0;
}
#endif /* CONFIG_PPC64 */
int do_signal(sigset_t *oldset, struct pt_regs *regs);
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
long sys_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
struct pt_regs *regs)
{
sigset_t saveset;
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs))
sigreturn_exit(regs);
}
}
long sys_rt_sigsuspend(
#ifdef CONFIG_PPC64
compat_sigset_t __user *unewset,
#else
sigset_t __user *unewset,
#endif
size_t sigsetsize, int p3, int p4,
int p6, int p7, struct pt_regs *regs)
{
sigset_t saveset, newset;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (get_sigset_t(&newset, unewset))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs))
sigreturn_exit(regs);
}
}
#ifdef CONFIG_PPC32
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, int r5,
int r6, int r7, int r8, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->gpr[1]);
}
#endif
long sys_sigaction(int sig, struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
#ifdef CONFIG_PPC64
if (sig < 0)
sig = -sig;
#endif
if (act) {
if (get_old_sigaction(&new_ka, act))
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(to_user_ptr(old_ka.sa.sa_handler),
&oact->sa_handler) ||
__put_user(to_user_ptr(old_ka.sa.sa_restorer),
&oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
/*
* When we have signals to deliver, we set up on the
* user stack, going down from the original stack pointer:
* a sigregs32 struct
* a sigcontext32 struct
* a gap of __SIGNAL_FRAMESIZE32 bytes
* a sigregs struct
* a sigcontext struct
* a gap of __SIGNAL_FRAMESIZE bytes
*
* Each of these things must be a multiple of 16 bytes in size.
*
*/
struct sigregs32 {
struct mcontext32 mctx; /* all the register values */
struct sigregs {
struct mcontext mctx; /* all the register values */
/*
* Programs using the rs6000/xcoff abi can save up to 19 gp
* regs and 18 fp regs below sp before decrementing it.
......@@ -64,17 +360,21 @@ struct sigregs32 {
/*
* When we have rt signals to deliver, we set up on the
* user stack, going down from the original stack pointer:
* one rt_sigframe32 struct (siginfo + ucontext + ABI gap)
* a gap of __SIGNAL_FRAMESIZE32+16 bytes
* (the +16 is to get the siginfo and ucontext32 in the same
* one rt_sigframe struct (siginfo + ucontext + ABI gap)
* a gap of __SIGNAL_FRAMESIZE+16 bytes
* (the +16 is to get the siginfo and ucontext in the same
* positions as in older kernels).
*
* Each of these things must be a multiple of 16 bytes in size.
*
*/
struct rt_sigframe32 {
compat_siginfo_t info;
struct ucontext32 uc;
struct rt_sigframe {
#ifdef CONFIG_PPC64
compat_siginfo_t info;
#else
struct siginfo info;
#endif
struct ucontext uc;
/*
* Programs using the rs6000/xcoff abi can save up to 19 gp
* regs and 18 fp regs below sp before decrementing it.
......@@ -82,66 +382,24 @@ struct rt_sigframe32 {
int abigap[56];
};
/*
* Common utility functions used by signal and context support
*
*/
/*
* Restore the user process's signal mask
* (implemented in signal.c)
*/
extern void restore_sigmask(sigset_t *set);
/*
* Functions for flipping sigsets (thanks to brain dead generic
* implementation that makes things simple for little endian only
*/
static inline void compat_from_sigset(compat_sigset_t *compat, sigset_t *set)
{
switch (_NSIG_WORDS) {
case 4: compat->sig[5] = set->sig[3] & 0xffffffffull ;
compat->sig[7] = set->sig[3] >> 32;
case 3: compat->sig[4] = set->sig[2] & 0xffffffffull ;
compat->sig[5] = set->sig[2] >> 32;
case 2: compat->sig[2] = set->sig[1] & 0xffffffffull ;
compat->sig[3] = set->sig[1] >> 32;
case 1: compat->sig[0] = set->sig[0] & 0xffffffffull ;
compat->sig[1] = set->sig[0] >> 32;
}
}
static inline void sigset_from_compat(sigset_t *set, compat_sigset_t *compat)
{
switch (_NSIG_WORDS) {
case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32);
case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32);
case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32);
case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32);
}
}
/*
* Save the current user registers on the user stack.
* We only save the altivec registers if the process has used
* altivec instructions at some point.
* We only save the altivec/spe registers if the process has used
* altivec/spe instructions at some point.
*/
static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame, int sigret)
static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
int sigret)
{
elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
int i, err = 0;
#ifdef CONFIG_PPC32
CHECK_FULL_REGS(regs);
#endif
/* Make sure floating point registers are stored in regs */
flush_fp_to_thread(current);
/* save general and floating-point registers */
for (i = 0; i <= PT_RESULT; i ++)
err |= __put_user((unsigned int)gregs[i], &frame->mc_gregs[i]);
err |= __copy_to_user(&frame->mc_fregs, current->thread.fpr,
ELF_NFPREG * sizeof(double));
if (err)
if (save_general_regs(regs, frame) ||
__copy_to_user(&frame->mc_fregs, current->thread.fpr,
ELF_NFPREG * sizeof(double)))
return 1;
current->thread.fpscr = 0; /* turn off all fp exceptions */
......@@ -151,7 +409,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
ELF_NVRREG32 * sizeof(vector128)))
ELF_NVRREG * sizeof(vector128)))
return 1;
/* set MSR_VEC in the saved MSR value to indicate that
frame->mc_vregs contains valid data */
......@@ -169,6 +427,25 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
return 1;
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
/* save spe registers */
if (current->thread.used_spe) {
flush_spe_to_thread(current);
if (__copy_to_user(&frame->mc_vregs, current->thread.evr,
ELF_NEVRREG * sizeof(u32)))
return 1;
/* set MSR_SPE in the saved MSR value to indicate that
frame->mc_vregs contains valid data */
if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR]))
return 1;
}
/* else assert((regs->msr & MSR_SPE) == 0) */
/* We always copy to/from spefscr */
if (__put_user(current->thread.spefscr, (u32 __user *)&frame->mc_vregs + ELF_NEVRREG))
return 1;
#endif /* CONFIG_SPE */
if (sigret) {
/* Set up the sigreturn trampoline: li r0,sigret; sc */
if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
......@@ -186,13 +463,11 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
* (except for MSR).
*/
static long restore_user_regs(struct pt_regs *regs,
struct mcontext32 __user *sr, int sig)
struct mcontext __user *sr, int sig)
{
elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
int i;
long err = 0;
long err;
unsigned int save_r2 = 0;
#ifdef CONFIG_ALTIVEC
#if defined(CONFIG_ALTIVEC) || defined(CONFIG_SPE)
unsigned long msr;
#endif
......@@ -202,11 +477,7 @@ static long restore_user_regs(struct pt_regs *regs,
*/
if (!sig)
save_r2 = (unsigned int)regs->gpr[2];
for (i = 0; i <= PT_RESULT; i++) {
if ((i == PT_MSR) || (i == PT_SOFTE))
continue;
err |= __get_user(gregs[i], &sr->mc_gregs[i]);
}
err = restore_general_regs(regs, sr);
if (!sig)
regs->gpr[2] = (unsigned long) save_r2;
if (err)
......@@ -229,135 +500,51 @@ static long restore_user_regs(struct pt_regs *regs,
sizeof(sr->mc_vregs)))
return 1;
} else if (current->thread.used_vr)
memset(current->thread.vr, 0, ELF_NVRREG32 * sizeof(vector128));
memset(current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
/* Always get VRSAVE back */
if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
/* force the process to reload the spe registers from
current->thread when it next does spe instructions */
regs->msr &= ~MSR_SPE;
if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_SPE) != 0) {
/* restore spe registers from the stack */
if (__copy_from_user(current->thread.evr, &sr->mc_vregs,
ELF_NEVRREG * sizeof(u32)))
return 1;
} else if (current->thread.used_spe)
memset(current->thread.evr, 0, ELF_NEVRREG * sizeof(u32));
/* Always get SPEFSCR back */
if (__get_user(current->thread.spefscr, (u32 __user *)&sr->mc_vregs + ELF_NEVRREG))
return 1;
#endif /* CONFIG_SPE */
#ifndef CONFIG_SMP
preempt_disable();
if (last_task_used_math == current)
last_task_used_math = NULL;
if (last_task_used_altivec == current)
last_task_used_altivec = NULL;
#ifdef CONFIG_SPE
if (last_task_used_spe == current)
last_task_used_spe = NULL;
#endif
preempt_enable();
#endif
return 0;
}
/*
* Start of nonRT signal support
*
* sigset_t is 32 bits for non-rt signals
*
* System Calls
* sigaction sys32_sigaction
* sigreturn sys32_sigreturn
*
* Note sigsuspend has no special 32 bit routine - uses the 64 bit routine
*
* Other routines
* setup_frame32
*/
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
long sys32_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
struct pt_regs *regs)
{
sigset_t saveset;
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal32(&saveset, regs))
/*
* Returning 0 means we return to userspace via
* ret_from_except and thus restore all user
* registers from *regs. This is what we need
* to do when a signal has been delivered.
*/
return 0;
}
}
long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
struct old_sigaction32 __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (sig < 0)
sig = -sig;
if (act) {
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka.sa.sa_handler = compat_ptr(handler);
new_ka.sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (put_user((long)old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user((long)old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
/*
* Start of RT signal support
*
* sigset_t is 64 bits for rt signals
*
* System Calls
* sigaction sys32_rt_sigaction
* sigpending sys32_rt_sigpending
* sigprocmask sys32_rt_sigprocmask
* sigreturn sys32_rt_sigreturn
* sigqueueinfo sys32_rt_sigqueueinfo
* sigsuspend sys32_rt_sigsuspend
*
* Other routines
* setup_rt_frame32
* copy_siginfo_to_user32
* siginfo32to64
*/
#ifdef CONFIG_PPC64
long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
struct sigaction32 __user *oact, size_t sigsetsize)
{
struct k_sigaction new_ka, old_ka;
int ret;
compat_sigset_t set32;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
......@@ -368,9 +555,7 @@ long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
ret = get_user(handler, &act->sa_handler);
new_ka.sa.sa_handler = compat_ptr(handler);
ret |= __copy_from_user(&set32, &act->sa_mask,
sizeof(compat_sigset_t));
sigset_from_compat(&new_ka.sa.sa_mask, &set32);
ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
if (ret)
return -EFAULT;
......@@ -378,10 +563,8 @@ long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
compat_from_sigset(&set32, &old_ka.sa.sa_mask);
ret = put_user((long)old_ka.sa.sa_handler, &oact->sa_handler);
ret |= __copy_to_user(&oact->sa_mask, &set32,
sizeof(compat_sigset_t));
ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
}
return ret;
......@@ -399,27 +582,24 @@ long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
{
sigset_t s;
sigset_t __user *up;
compat_sigset_t s32;
int ret;
mm_segment_t old_fs = get_fs();
if (set) {
if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
return -EFAULT;
sigset_from_compat(&s, &s32);
if (get_sigset_t(&s, set))
return -EFAULT;
}
set_fs(KERNEL_DS);
/* This is valid because of the set_fs() */
up = (sigset_t __user *) &s;
ret = sys_rt_sigprocmask((int)how, set ? up : NULL, oset ? up : NULL,
sigsetsize);
sigsetsize);
set_fs(old_fs);
if (ret)
return ret;
if (oset) {
compat_from_sigset(&s32, &s);
if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
if (put_sigset_t(oset, &s))
return -EFAULT;
}
return 0;
......@@ -428,7 +608,6 @@ long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
long sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
{
sigset_t s;
compat_sigset_t s32;
int ret;
mm_segment_t old_fs = get_fs();
......@@ -437,8 +616,7 @@ long sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
set_fs(old_fs);
if (!ret) {
compat_from_sigset(&s32, &s);
if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
if (put_sigset_t(set, &s))
return -EFAULT;
}
return ret;
......@@ -500,6 +678,8 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
return err;
}
#define copy_siginfo_to_user copy_siginfo_to_user32
/*
* Note: it is necessary to treat pid and sig as unsigned ints, with the
* corresponding cast to a signed int to insure that the proper conversion
......@@ -512,7 +692,7 @@ long sys32_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
siginfo_t info;
int ret;
mm_segment_t old_fs = get_fs();
if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE32))
return -EFAULT;
......@@ -522,50 +702,6 @@ long sys32_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
set_fs (old_fs);
return ret;
}
int sys32_rt_sigsuspend(compat_sigset_t __user * unewset, size_t sigsetsize, int p3,
int p4, int p6, int p7, struct pt_regs *regs)
{
sigset_t saveset, newset;
compat_sigset_t s32;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (copy_from_user(&s32, unewset, sizeof(s32)))
return -EFAULT;
/*
* Swap the 2 words of the 64-bit sigset_t (they are stored
* in the "wrong" endian in 32-bit user storage).
*/
sigset_from_compat(&newset, &s32);
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal32(&saveset, regs))
/*
* Returning 0 means we return to userspace via
* ret_from_except and thus restore all user
* registers from *regs. This is what we need
* to do when a signal has been delivered.
*/
return 0;
}
}
/*
* Start Alternate signal stack support
*
......@@ -615,76 +751,95 @@ int sys32_sigaltstack(u32 __new, u32 __old, int r5,
return -EFAULT;
return ret;
}
#endif /* CONFIG_PPC64 */
/*
* Restore the user process's signal mask
*/
#ifdef CONFIG_PPC64
extern void restore_sigmask(sigset_t *set);
#else /* CONFIG_PPC64 */
static void restore_sigmask(sigset_t *set)
{
sigdelsetmask(set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = *set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
}
#endif
/*
* Set up a signal frame for a "real-time" signal handler
* (one which gets siginfo).
*/
static int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs, unsigned long newsp)
static int handle_rt_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs *regs, unsigned long newsp)
{
struct rt_sigframe32 __user *rt_sf;
struct mcontext32 __user *frame;
struct rt_sigframe __user *rt_sf;
struct mcontext __user *frame;
unsigned long origsp = newsp;
compat_sigset_t c_oldset;
/* Set up Signal Frame */
/* Put a Real Time Context onto stack */
newsp -= sizeof(*rt_sf);
rt_sf = (struct rt_sigframe32 __user *)newsp;
rt_sf = (struct rt_sigframe __user *)newsp;
/* create a stack frame for the caller of the handler */
newsp -= __SIGNAL_FRAMESIZE32 + 16;
newsp -= __SIGNAL_FRAMESIZE + 16;
if (!access_ok(VERIFY_WRITE, (void __user *)newsp, origsp - newsp))
goto badframe;
compat_from_sigset(&c_oldset, oldset);
/* Put the siginfo & fill in most of the ucontext */
if (copy_siginfo_to_user32(&rt_sf->info, info)
if (copy_siginfo_to_user(&rt_sf->info, info)
|| __put_user(0, &rt_sf->uc.uc_flags)
|| __put_user(0, &rt_sf->uc.uc_link)
|| __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
|| __put_user(sas_ss_flags(regs->gpr[1]),
&rt_sf->uc.uc_stack.ss_flags)
|| __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
|| __put_user((u32)(u64)&rt_sf->uc.uc_mcontext, &rt_sf->uc.uc_regs)
|| __copy_to_user(&rt_sf->uc.uc_sigmask, &c_oldset, sizeof(c_oldset)))
|| __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext),
&rt_sf->uc.uc_regs)
|| put_sigset_t(&rt_sf->uc.uc_sigmask, oldset))
goto badframe;
/* Save user registers on the stack */
frame = &rt_sf->uc.uc_mcontext;
if (put_user(regs->gpr[1], (u32 __user *)newsp))
goto badframe;
#ifdef CONFIG_PPC64
if (vdso32_rt_sigtramp && current->thread.vdso_base) {
if (save_user_regs(regs, frame, 0))
goto badframe;
regs->link = current->thread.vdso_base + vdso32_rt_sigtramp;
} else {
} else
#endif
{
if (save_user_regs(regs, frame, __NR_rt_sigreturn))
goto badframe;
regs->link = (unsigned long) frame->tramp;
}
regs->gpr[1] = (unsigned long) newsp;
if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
goto badframe;
regs->gpr[1] = newsp;
regs->gpr[3] = sig;
regs->gpr[4] = (unsigned long) &rt_sf->info;
regs->gpr[5] = (unsigned long) &rt_sf->uc;
regs->gpr[6] = (unsigned long) rt_sf;
regs->nip = (unsigned long) ka->sa.sa_handler;
regs->link = (unsigned long) frame->tramp;
regs->trap = 0;
#ifdef CONFIG_PPC64
regs->result = 0;
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#endif
return 1;
badframe:
#if DEBUG_SIG
#ifdef DEBUG_SIG
printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
......@@ -692,46 +847,50 @@ badframe:
return 0;
}
static long do_setcontext32(struct ucontext32 __user *ucp, struct pt_regs *regs, int sig)
static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig)
{
compat_sigset_t c_set;
sigset_t set;
u32 mcp;
struct mcontext __user *mcp;
if (get_sigset_t(&set, &ucp->uc_sigmask))
return -EFAULT;
#ifdef CONFIG_PPC64
{
u32 cmcp;
if (__copy_from_user(&c_set, &ucp->uc_sigmask, sizeof(c_set))
|| __get_user(mcp, &ucp->uc_regs))
if (__get_user(cmcp, &ucp->uc_regs))
return -EFAULT;
mcp = (struct mcontext __user *)(u64)cmcp;
}
#else
if (__get_user(mcp, &ucp->uc_regs))
return -EFAULT;
sigset_from_compat(&set, &c_set);
#endif
restore_sigmask(&set);
if (restore_user_regs(regs, (struct mcontext32 __user *)(u64)mcp, sig))
if (restore_user_regs(regs, mcp, sig))
return -EFAULT;
return 0;
}
/*
* Handle {get,set,swap}_context operations for 32 bits processes
*/
long sys32_swapcontext(struct ucontext32 __user *old_ctx,
struct ucontext32 __user *new_ctx,
long sys_swapcontext(struct ucontext __user *old_ctx,
struct ucontext __user *new_ctx,
int ctx_size, int r6, int r7, int r8, struct pt_regs *regs)
{
unsigned char tmp;
compat_sigset_t c_set;
/* Context size is for future use. Right now, we only make sure
* we are passed something we understand
*/
if (ctx_size < sizeof(struct ucontext32))
if (ctx_size < sizeof(struct ucontext))
return -EINVAL;
if (old_ctx != NULL) {
compat_from_sigset(&c_set, &current->blocked);
if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx))
|| save_user_regs(regs, &old_ctx->uc_mcontext, 0)
|| __copy_to_user(&old_ctx->uc_sigmask, &c_set, sizeof(c_set))
|| __put_user((u32)(u64)&old_ctx->uc_mcontext, &old_ctx->uc_regs))
|| put_sigset_t(&old_ctx->uc_sigmask, &current->blocked)
|| __put_user(to_user_ptr(&old_ctx->uc_mcontext),
&old_ctx->uc_regs))
return -EFAULT;
}
if (new_ctx == NULL)
......@@ -752,27 +911,26 @@ long sys32_swapcontext(struct ucontext32 __user *old_ctx,
* or if another thread unmaps the region containing the context.
* We kill the task with a SIGSEGV in this situation.
*/
if (do_setcontext32(new_ctx, regs, 0))
if (do_setcontext(new_ctx, regs, 0))
do_exit(SIGSEGV);
sigreturn_exit(regs);
/* doesn't actually return back to here */
return 0;
}
long sys32_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
struct pt_regs *regs)
{
struct rt_sigframe32 __user *rt_sf;
int ret;
struct rt_sigframe __user *rt_sf;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
rt_sf = (struct rt_sigframe32 __user *)
(regs->gpr[1] + __SIGNAL_FRAMESIZE32 + 16);
rt_sf = (struct rt_sigframe __user *)
(regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
if (!access_ok(VERIFY_READ, rt_sf, sizeof(*rt_sf)))
goto bad;
if (do_setcontext32(&rt_sf->uc, regs, 1))
if (do_setcontext(&rt_sf->uc, regs, 1))
goto bad;
/*
......@@ -781,62 +939,165 @@ long sys32_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
* signal return. But other architectures do this and we have
* always done it up until now so it is probably better not to
* change it. -- paulus
*/
#ifdef CONFIG_PPC64
/*
* We use the sys32_ version that does the 32/64 bits conversion
* and takes userland pointer directly. What about error checking ?
* nobody does any...
*/
sys32_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
ret = regs->result;
return ret;
sys32_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
return (int)regs->result;
#else
do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
sigreturn_exit(regs); /* doesn't return here */
return 0;
#endif
bad:
force_sig(SIGSEGV, current);
return 0;
}
#ifdef CONFIG_PPC32
int sys_debug_setcontext(struct ucontext __user *ctx,
int ndbg, struct sig_dbg_op __user *dbg,
int r6, int r7, int r8,
struct pt_regs *regs)
{
struct sig_dbg_op op;
int i;
unsigned long new_msr = regs->msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
unsigned long new_dbcr0 = current->thread.dbcr0;
#endif
for (i=0; i<ndbg; i++) {
if (__copy_from_user(&op, dbg, sizeof(op)))
return -EFAULT;
switch (op.dbg_type) {
case SIG_DBG_SINGLE_STEPPING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
if (op.dbg_value) {
new_msr |= MSR_DE;
new_dbcr0 |= (DBCR0_IDM | DBCR0_IC);
} else {
new_msr &= ~MSR_DE;
new_dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
}
#else
if (op.dbg_value)
new_msr |= MSR_SE;
else
new_msr &= ~MSR_SE;
#endif
break;
case SIG_DBG_BRANCH_TRACING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
return -EINVAL;
#else
if (op.dbg_value)
new_msr |= MSR_BE;
else
new_msr &= ~MSR_BE;
#endif
break;
default:
return -EINVAL;
}
}
/* We wait until here to actually install the values in the
registers so if we fail in the above loop, it will not
affect the contents of these registers. After this point,
failure is a problem, anyway, and it's very unlikely unless
the user is really doing something wrong. */
regs->msr = new_msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
current->thread.dbcr0 = new_dbcr0;
#endif
/*
* If we get a fault copying the context into the kernel's
* image of the user's registers, we can't just return -EFAULT
* because the user's registers will be corrupted. For instance
* the NIP value may have been updated but not some of the
* other registers. Given that we have done the access_ok
* and successfully read the first and last bytes of the region
* above, this should only happen in an out-of-memory situation
* or if another thread unmaps the region containing the context.
* We kill the task with a SIGSEGV in this situation.
*/
if (do_setcontext(ctx, regs, 1)) {
force_sig(SIGSEGV, current);
goto out;
}
/*
* It's not clear whether or why it is desirable to save the
* sigaltstack setting on signal delivery and restore it on
* signal return. But other architectures do this and we have
* always done it up until now so it is probably better not to
* change it. -- paulus
*/
do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
sigreturn_exit(regs);
/* doesn't actually return back to here */
out:
return 0;
}
#endif
/*
* OK, we're invoking a handler
*/
static int handle_signal32(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs, unsigned long newsp)
static int handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs *regs,
unsigned long newsp)
{
struct sigcontext32 __user *sc;
struct sigregs32 __user *frame;
struct sigcontext __user *sc;
struct sigregs __user *frame;
unsigned long origsp = newsp;
/* Set up Signal Frame */
newsp -= sizeof(struct sigregs32);
frame = (struct sigregs32 __user *) newsp;
newsp -= sizeof(struct sigregs);
frame = (struct sigregs __user *) newsp;
/* Put a sigcontext on the stack */
newsp -= sizeof(*sc);
sc = (struct sigcontext32 __user *) newsp;
sc = (struct sigcontext __user *) newsp;
/* create a stack frame for the caller of the handler */
newsp -= __SIGNAL_FRAMESIZE32;
newsp -= __SIGNAL_FRAMESIZE;
if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
goto badframe;
#if _NSIG != 64
#error "Please adjust handle_signal32()"
#error "Please adjust handle_signal()"
#endif
if (__put_user((u32)(u64)ka->sa.sa_handler, &sc->handler)
if (__put_user(to_user_ptr(ka->sa.sa_handler), &sc->handler)
|| __put_user(oldset->sig[0], &sc->oldmask)
#ifdef CONFIG_PPC64
|| __put_user((oldset->sig[0] >> 32), &sc->_unused[3])
|| __put_user((u32)(u64)frame, &sc->regs)
#else
|| __put_user(oldset->sig[1], &sc->_unused[3])
#endif
|| __put_user(to_user_ptr(frame), &sc->regs)
|| __put_user(sig, &sc->signal))
goto badframe;
#ifdef CONFIG_PPC64
if (vdso32_sigtramp && current->thread.vdso_base) {
if (save_user_regs(regs, &frame->mctx, 0))
goto badframe;
regs->link = current->thread.vdso_base + vdso32_sigtramp;
} else {
} else
#endif
{
if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
goto badframe;
regs->link = (unsigned long) frame->mctx.tramp;
......@@ -844,22 +1105,24 @@ static int handle_signal32(unsigned long sig, struct k_sigaction *ka,
if (put_user(regs->gpr[1], (u32 __user *)newsp))
goto badframe;
regs->gpr[1] = (unsigned long) newsp;
regs->gpr[1] = newsp;
regs->gpr[3] = sig;
regs->gpr[4] = (unsigned long) sc;
regs->nip = (unsigned long) ka->sa.sa_handler;
regs->trap = 0;
#ifdef CONFIG_PPC64
regs->result = 0;
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#endif
return 1;
badframe:
#if DEBUG_SIG
printk("badframe in handle_signal, regs=%p frame=%x newsp=%x\n",
regs, frame, *newspp);
#ifdef DEBUG_SIG
printk("badframe in handle_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
force_sigsegv(sig, current);
return 0;
......@@ -868,65 +1131,69 @@ badframe:
/*
* Do a signal return; undo the signal stack.
*/
long sys32_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
long sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
struct pt_regs *regs)
{
struct sigcontext32 __user *sc;
struct sigcontext32 sigctx;
struct mcontext32 __user *sr;
struct sigcontext __user *sc;
struct sigcontext sigctx;
struct mcontext __user *sr;
sigset_t set;
int ret;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
sc = (struct sigcontext32 __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE32);
sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
goto badframe;
#ifdef CONFIG_PPC64
/*
* Note that PPC32 puts the upper 32 bits of the sigmask in the
* unused part of the signal stackframe
*/
set.sig[0] = sigctx.oldmask + ((long)(sigctx._unused[3]) << 32);
#else
set.sig[0] = sigctx.oldmask;
set.sig[1] = sigctx._unused[3];
#endif
restore_sigmask(&set);
sr = (struct mcontext32 __user *)(u64)sigctx.regs;
sr = (struct mcontext __user *)from_user_ptr(sigctx.regs);
if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
|| restore_user_regs(regs, sr, 1))
goto badframe;
ret = regs->result;
return ret;
#ifdef CONFIG_PPC64
return (int)regs->result;
#else
sigreturn_exit(regs); /* doesn't return */
return 0;
#endif
badframe:
force_sig(SIGSEGV, current);
return 0;
}
/*
* Start of do_signal32 routine
*
* This routine gets control when a pending signal needs to be processed
* in the 32 bit target thread -
*
* It handles both rt and non-rt signals
*/
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
int do_signal32(sigset_t *oldset, struct pt_regs *regs)
int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
struct k_sigaction ka;
unsigned int frame, newsp;
int signr, ret;
struct k_sigaction ka;
#ifdef CONFIG_PPC32
if (try_to_freeze()) {
signr = 0;
if (!signal_pending(current))
goto no_signal;
}
#endif
if (!oldset)
oldset = &current->blocked;
......@@ -934,7 +1201,9 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
newsp = frame = 0;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
#ifdef CONFIG_PPC32
no_signal:
#endif
if (TRAP(regs) == 0x0C00 /* System Call! */
&& regs->ccr & 0x10000000 /* error signalled */
&& ((ret = regs->gpr[3]) == ERESTARTSYS
......@@ -964,12 +1233,13 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
return 0; /* no signals delivered */
if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
&& (!on_sig_stack(regs->gpr[1])))
newsp = (current->sas_ss_sp + current->sas_ss_size);
&& !on_sig_stack(regs->gpr[1]))
newsp = current->sas_ss_sp + current->sas_ss_size;
else
newsp = regs->gpr[1];
newsp &= ~0xfUL;
#ifdef CONFIG_PPC64
/*
* Reenable the DABR before delivering the signal to
* user space. The DABR will have been cleared if it
......@@ -977,12 +1247,13 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
*/
if (current->thread.dabr)
set_dabr(current->thread.dabr);
#endif
/* Whee! Actually deliver the signal. */
if (ka.sa.sa_flags & SA_SIGINFO)
ret = handle_rt_signal32(signr, &ka, &info, oldset, regs, newsp);
ret = handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
else
ret = handle_signal32(signr, &ka, &info, oldset, regs, newsp);
ret = handle_signal(signr, &ka, &info, oldset, regs, newsp);
if (ret) {
spin_lock_irq(&current->sighand->siglock);
......
arch/ppc/kernel/Makefile
View file @ 81e7009e
......@@ -13,7 +13,7 @@ extra-$(CONFIG_POWER4) += idle_power4.o
extra-y += vmlinux.lds
obj-y := entry.o traps.o irq.o idle.o time.o misc.o \
process.o signal.o align.o \
process.o align.o \
syscalls.o setup.o \
ppc_htab.o perfmon.o
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
......@@ -38,7 +38,7 @@ endif
else
obj-y := irq.o idle.o time.o \
signal.o align.o perfmon.o
align.o perfmon.o
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj-$(CONFIG_MODULES) += module.o
......
arch/ppc/kernel/signal.c deleted 100644 → 0
View file @ 55d36339
/*
* arch/ppc/kernel/signal.c
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Derived from "arch/i386/kernel/signal.c"
* Copyright (C) 1991, 1992 Linus Torvalds
* 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/elf.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/suspend.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
#undef DEBUG_SIG
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
extern void sigreturn_exit(struct pt_regs *);
#define GP_REGS_SIZE min(sizeof(elf_gregset_t), sizeof(struct pt_regs))
int do_signal(sigset_t *oldset, struct pt_regs *regs);
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
int
sys_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
struct pt_regs *regs)
{
sigset_t saveset;
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs))
sigreturn_exit(regs);
}
}
int
sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, int p3, int p4,
int p6, int p7, struct pt_regs *regs)
{
sigset_t saveset, newset;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
current->blocked = newset;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
regs->result = -EINTR;
regs->gpr[3] = EINTR;
regs->ccr |= 0x10000000;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(&saveset, regs))
sigreturn_exit(regs);
}
}
int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, int r5,
int r6, int r7, int r8, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->gpr[1]);
}
int
sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
return -EFAULT;
__get_user(new_ka.sa.sa_flags, &act->sa_flags);
__get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, (act? &new_ka: NULL), (oact? &old_ka: NULL));
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
return -EFAULT;
__put_user(old_ka.sa.sa_flags, &oact->sa_flags);
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
}
/*
* When we have signals to deliver, we set up on the
* user stack, going down from the original stack pointer:
* a sigregs struct
* a sigcontext struct
* a gap of __SIGNAL_FRAMESIZE bytes
*
* Each of these things must be a multiple of 16 bytes in size.
*
*/
struct sigregs {
struct mcontext mctx; /* all the register values */
/* Programs using the rs6000/xcoff abi can save up to 19 gp regs
and 18 fp regs below sp before decrementing it. */
int abigap[56];
};
/* We use the mc_pad field for the signal return trampoline. */
#define tramp mc_pad
/*
* When we have rt signals to deliver, we set up on the
* user stack, going down from the original stack pointer:
* one rt_sigframe struct (siginfo + ucontext + ABI gap)
* a gap of __SIGNAL_FRAMESIZE+16 bytes
* (the +16 is to get the siginfo and ucontext in the same
* positions as in older kernels).
*
* Each of these things must be a multiple of 16 bytes in size.
*
*/
struct rt_sigframe
{
struct siginfo info;
struct ucontext uc;
/* Programs using the rs6000/xcoff abi can save up to 19 gp regs
and 18 fp regs below sp before decrementing it. */
int abigap[56];
};
/*
* Save the current user registers on the user stack.
* We only save the altivec/spe registers if the process has used
* altivec/spe instructions at some point.
*/
static int
save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, int sigret)
{
/* save general and floating-point registers */
CHECK_FULL_REGS(regs);
preempt_disable();
if (regs->msr & MSR_FP)
giveup_fpu(current);
#ifdef CONFIG_ALTIVEC
if (current->thread.used_vr && (regs->msr & MSR_VEC))
giveup_altivec(current);
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
if (current->thread.used_spe && (regs->msr & MSR_SPE))
giveup_spe(current);
#endif /* CONFIG_ALTIVEC */
preempt_enable();
if (__copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE)
|| __copy_to_user(&frame->mc_fregs, current->thread.fpr,
ELF_NFPREG * sizeof(double)))
return 1;
current->thread.fpscr = 0; /* turn off all fp exceptions */
#ifdef CONFIG_ALTIVEC
/* save altivec registers */
if (current->thread.used_vr) {
if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
ELF_NVRREG * sizeof(vector128)))
return 1;
/* set MSR_VEC in the saved MSR value to indicate that
frame->mc_vregs contains valid data */
if (__put_user(regs->msr | MSR_VEC, &frame->mc_gregs[PT_MSR]))
return 1;
}
/* else assert((regs->msr & MSR_VEC) == 0) */
/* We always copy to/from vrsave, it's 0 if we don't have or don't
* use altivec. Since VSCR only contains 32 bits saved in the least
* significant bits of a vector, we "cheat" and stuff VRSAVE in the
* most significant bits of that same vector. --BenH
*/
if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
/* save spe registers */
if (current->thread.used_spe) {
if (__copy_to_user(&frame->mc_vregs, current->thread.evr,
ELF_NEVRREG * sizeof(u32)))
return 1;
/* set MSR_SPE in the saved MSR value to indicate that
frame->mc_vregs contains valid data */
if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR]))
return 1;
}
/* else assert((regs->msr & MSR_SPE) == 0) */
/* We always copy to/from spefscr */
if (__put_user(current->thread.spefscr, (u32 *)&frame->mc_vregs + ELF_NEVRREG))
return 1;
#endif /* CONFIG_SPE */
if (sigret) {
/* Set up the sigreturn trampoline: li r0,sigret; sc */
if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
|| __put_user(0x44000002UL, &frame->tramp[1]))
return 1;
flush_icache_range((unsigned long) &frame->tramp[0],
(unsigned long) &frame->tramp[2]);
}
return 0;
}
/*
* Restore the current user register values from the user stack,
* (except for MSR).
*/
static int
restore_user_regs(struct pt_regs *regs, struct mcontext __user *sr, int sig)
{
unsigned long save_r2 = 0;
#if defined(CONFIG_ALTIVEC) || defined(CONFIG_SPE)
unsigned long msr;
#endif
/* backup/restore the TLS as we don't want it to be modified */
if (!sig)
save_r2 = regs->gpr[2];
/* copy up to but not including MSR */
if (__copy_from_user(regs, &sr->mc_gregs, PT_MSR * sizeof(elf_greg_t)))
return 1;
/* copy from orig_r3 (the word after the MSR) up to the end */
if (__copy_from_user(&regs->orig_gpr3, &sr->mc_gregs[PT_ORIG_R3],
GP_REGS_SIZE - PT_ORIG_R3 * sizeof(elf_greg_t)))
return 1;
if (!sig)
regs->gpr[2] = save_r2;
/* force the process to reload the FP registers from
current->thread when it next does FP instructions */
regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
if (__copy_from_user(current->thread.fpr, &sr->mc_fregs,
sizeof(sr->mc_fregs)))
return 1;
#ifdef CONFIG_ALTIVEC
/* force the process to reload the altivec registers from
current->thread when it next does altivec instructions */
regs->msr &= ~MSR_VEC;
if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_VEC) != 0) {
/* restore altivec registers from the stack */
if (__copy_from_user(current->thread.vr, &sr->mc_vregs,
sizeof(sr->mc_vregs)))
return 1;
} else if (current->thread.used_vr)
memset(&current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
/* Always get VRSAVE back */
if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
return 1;
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
/* force the process to reload the spe registers from
current->thread when it next does spe instructions */
regs->msr &= ~MSR_SPE;
if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_SPE) != 0) {
/* restore spe registers from the stack */
if (__copy_from_user(current->thread.evr, &sr->mc_vregs,
ELF_NEVRREG * sizeof(u32)))
return 1;
} else if (current->thread.used_spe)
memset(&current->thread.evr, 0, ELF_NEVRREG * sizeof(u32));
/* Always get SPEFSCR back */
if (__get_user(current->thread.spefscr, (u32 *)&sr->mc_vregs + ELF_NEVRREG))
return 1;
#endif /* CONFIG_SPE */
#ifndef CONFIG_SMP
preempt_disable();
if (last_task_used_math == current)
last_task_used_math = NULL;
if (last_task_used_altivec == current)
last_task_used_altivec = NULL;
if (last_task_used_spe == current)
last_task_used_spe = NULL;
preempt_enable();
#endif
return 0;
}
/*
* Restore the user process's signal mask
*/
static void
restore_sigmask(sigset_t *set)
{
sigdelsetmask(set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = *set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
}
/*
* Set up a signal frame for a "real-time" signal handler
* (one which gets siginfo).
*/
static void
handle_rt_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs * regs,
unsigned long newsp)
{
struct rt_sigframe __user *rt_sf;
struct mcontext __user *frame;
unsigned long origsp = newsp;
/* Set up Signal Frame */
/* Put a Real Time Context onto stack */
newsp -= sizeof(*rt_sf);
rt_sf = (struct rt_sigframe __user *) newsp;
/* create a stack frame for the caller of the handler */
newsp -= __SIGNAL_FRAMESIZE + 16;
if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
goto badframe;
/* Put the siginfo & fill in most of the ucontext */
if (copy_siginfo_to_user(&rt_sf->info, info)
|| __put_user(0, &rt_sf->uc.uc_flags)
|| __put_user(0, &rt_sf->uc.uc_link)
|| __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
|| __put_user(sas_ss_flags(regs->gpr[1]),
&rt_sf->uc.uc_stack.ss_flags)
|| __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
|| __put_user(&rt_sf->uc.uc_mcontext, &rt_sf->uc.uc_regs)
|| __copy_to_user(&rt_sf->uc.uc_sigmask, oldset, sizeof(*oldset)))
goto badframe;
/* Save user registers on the stack */
frame = &rt_sf->uc.uc_mcontext;
if (save_user_regs(regs, frame, __NR_rt_sigreturn))
goto badframe;
if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
goto badframe;
regs->gpr[1] = newsp;
regs->gpr[3] = sig;
regs->gpr[4] = (unsigned long) &rt_sf->info;
regs->gpr[5] = (unsigned long) &rt_sf->uc;
regs->gpr[6] = (unsigned long) rt_sf;
regs->nip = (unsigned long) ka->sa.sa_handler;
regs->link = (unsigned long) frame->tramp;
regs->trap = 0;
return;
badframe:
#ifdef DEBUG_SIG
printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
force_sigsegv(sig, current);
}
static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig)
{
sigset_t set;
struct mcontext __user *mcp;
if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(set))
|| __get_user(mcp, &ucp->uc_regs))
return -EFAULT;
restore_sigmask(&set);
if (restore_user_regs(regs, mcp, sig))
return -EFAULT;
return 0;
}
int sys_swapcontext(struct ucontext __user *old_ctx,
struct ucontext __user *new_ctx,
int ctx_size, int r6, int r7, int r8, struct pt_regs *regs)
{
unsigned char tmp;
/* Context size is for future use. Right now, we only make sure
* we are passed something we understand
*/
if (ctx_size < sizeof(struct ucontext))
return -EINVAL;
if (old_ctx != NULL) {
if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx))
|| save_user_regs(regs, &old_ctx->uc_mcontext, 0)
|| __copy_to_user(&old_ctx->uc_sigmask,
&current->blocked, sizeof(sigset_t))
|| __put_user(&old_ctx->uc_mcontext, &old_ctx->uc_regs))
return -EFAULT;
}
if (new_ctx == NULL)
return 0;
if (!access_ok(VERIFY_READ, new_ctx, sizeof(*new_ctx))
|| __get_user(tmp, (u8 __user *) new_ctx)
|| __get_user(tmp, (u8 __user *) (new_ctx + 1) - 1))
return -EFAULT;
/*
* If we get a fault copying the context into the kernel's
* image of the user's registers, we can't just return -EFAULT
* because the user's registers will be corrupted. For instance
* the NIP value may have been updated but not some of the
* other registers. Given that we have done the access_ok
* and successfully read the first and last bytes of the region
* above, this should only happen in an out-of-memory situation
* or if another thread unmaps the region containing the context.
* We kill the task with a SIGSEGV in this situation.
*/
if (do_setcontext(new_ctx, regs, 0))
do_exit(SIGSEGV);
sigreturn_exit(regs);
/* doesn't actually return back to here */
return 0;
}
int sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
struct pt_regs *regs)
{
struct rt_sigframe __user *rt_sf;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
rt_sf = (struct rt_sigframe __user *)
(regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
if (!access_ok(VERIFY_READ, rt_sf, sizeof(struct rt_sigframe)))
goto bad;
if (do_setcontext(&rt_sf->uc, regs, 1))
goto bad;
/*
* It's not clear whether or why it is desirable to save the
* sigaltstack setting on signal delivery and restore it on
* signal return. But other architectures do this and we have
* always done it up until now so it is probably better not to
* change it. -- paulus
*/
do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
sigreturn_exit(regs); /* doesn't return here */
return 0;
bad:
force_sig(SIGSEGV, current);
return 0;
}
int sys_debug_setcontext(struct ucontext __user *ctx,
int ndbg, struct sig_dbg_op __user *dbg,
int r6, int r7, int r8,
struct pt_regs *regs)
{
struct sig_dbg_op op;
int i;
unsigned long new_msr = regs->msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
unsigned long new_dbcr0 = current->thread.dbcr0;
#endif
for (i=0; i<ndbg; i++) {
if (__copy_from_user(&op, dbg, sizeof(op)))
return -EFAULT;
switch (op.dbg_type) {
case SIG_DBG_SINGLE_STEPPING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
if (op.dbg_value) {
new_msr |= MSR_DE;
new_dbcr0 |= (DBCR0_IDM | DBCR0_IC);
} else {
new_msr &= ~MSR_DE;
new_dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
}
#else
if (op.dbg_value)
new_msr |= MSR_SE;
else
new_msr &= ~MSR_SE;
#endif
break;
case SIG_DBG_BRANCH_TRACING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
return -EINVAL;
#else
if (op.dbg_value)
new_msr |= MSR_BE;
else
new_msr &= ~MSR_BE;
#endif
break;
default:
return -EINVAL;
}
}
/* We wait until here to actually install the values in the
registers so if we fail in the above loop, it will not
affect the contents of these registers. After this point,
failure is a problem, anyway, and it's very unlikely unless
the user is really doing something wrong. */
regs->msr = new_msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
current->thread.dbcr0 = new_dbcr0;
#endif
/*
* If we get a fault copying the context into the kernel's
* image of the user's registers, we can't just return -EFAULT
* because the user's registers will be corrupted. For instance
* the NIP value may have been updated but not some of the
* other registers. Given that we have done the access_ok
* and successfully read the first and last bytes of the region
* above, this should only happen in an out-of-memory situation
* or if another thread unmaps the region containing the context.
* We kill the task with a SIGSEGV in this situation.
*/
if (do_setcontext(ctx, regs, 1)) {
force_sig(SIGSEGV, current);
goto out;
}
/*
* It's not clear whether or why it is desirable to save the
* sigaltstack setting on signal delivery and restore it on
* signal return. But other architectures do this and we have
* always done it up until now so it is probably better not to
* change it. -- paulus
*/
do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
sigreturn_exit(regs);
/* doesn't actually return back to here */
out:
return 0;
}
/*
* OK, we're invoking a handler
*/
static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs * regs,
unsigned long newsp)
{
struct sigcontext __user *sc;
struct sigregs __user *frame;
unsigned long origsp = newsp;
/* Set up Signal Frame */
newsp -= sizeof(struct sigregs);
frame = (struct sigregs __user *) newsp;
/* Put a sigcontext on the stack */
newsp -= sizeof(*sc);
sc = (struct sigcontext __user *) newsp;
/* create a stack frame for the caller of the handler */
newsp -= __SIGNAL_FRAMESIZE;
if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
goto badframe;
#if _NSIG != 64
#error "Please adjust handle_signal()"
#endif
if (__put_user((unsigned long) ka->sa.sa_handler, &sc->handler)
|| __put_user(oldset->sig[0], &sc->oldmask)
|| __put_user(oldset->sig[1], &sc->_unused[3])
|| __put_user((struct pt_regs __user *)frame, &sc->regs)
|| __put_user(sig, &sc->signal))
goto badframe;
if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
goto badframe;
if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
goto badframe;
regs->gpr[1] = newsp;
regs->gpr[3] = sig;
regs->gpr[4] = (unsigned long) sc;
regs->nip = (unsigned long) ka->sa.sa_handler;
regs->link = (unsigned long) frame->mctx.tramp;
regs->trap = 0;
return;
badframe:
#ifdef DEBUG_SIG
printk("badframe in handle_signal, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
force_sigsegv(sig, current);
}
/*
* Do a signal return; undo the signal stack.
*/
int sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
struct pt_regs *regs)
{
struct sigcontext __user *sc;
struct sigcontext sigctx;
struct mcontext __user *sr;
sigset_t set;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
goto badframe;
set.sig[0] = sigctx.oldmask;
set.sig[1] = sigctx._unused[3];
restore_sigmask(&set);
sr = (struct mcontext __user *) sigctx.regs;
if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
|| restore_user_regs(regs, sr, 1))
goto badframe;
sigreturn_exit(regs); /* doesn't return */
return 0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
struct k_sigaction ka;
unsigned long frame, newsp;
int signr, ret;
if (try_to_freeze()) {
signr = 0;
if (!signal_pending(current))
goto no_signal;
}
if (!oldset)
oldset = &current->blocked;
newsp = frame = 0;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
no_signal:
if (TRAP(regs) == 0x0C00 /* System Call! */
&& regs->ccr & 0x10000000 /* error signalled */
&& ((ret = regs->gpr[3]) == ERESTARTSYS
|| ret == ERESTARTNOHAND || ret == ERESTARTNOINTR
|| ret == ERESTART_RESTARTBLOCK)) {
if (signr > 0
&& (ret == ERESTARTNOHAND || ret == ERESTART_RESTARTBLOCK
|| (ret == ERESTARTSYS
&& !(ka.sa.sa_flags & SA_RESTART)))) {
/* make the system call return an EINTR error */
regs->result = -EINTR;
regs->gpr[3] = EINTR;
/* note that the cr0.SO bit is already set */
} else {
regs->nip -= 4; /* Back up & retry system call */
regs->result = 0;
regs->trap = 0;
if (ret == ERESTART_RESTARTBLOCK)
regs->gpr[0] = __NR_restart_syscall;
else
regs->gpr[3] = regs->orig_gpr3;
}
}
if (signr == 0)
return 0; /* no signals delivered */
if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
&& !on_sig_stack(regs->gpr[1]))
newsp = current->sas_ss_sp + current->sas_ss_size;
else
newsp = regs->gpr[1];
newsp &= ~0xfUL;
/* Whee! Actually deliver the signal. */
if (ka.sa.sa_flags & SA_SIGINFO)
handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
else
handle_signal(signr, &ka, &info, oldset, regs, newsp);
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked,&current->blocked,&ka.sa.sa_mask);
if (!(ka.sa.sa_flags & SA_NODEFER))
sigaddset(&current->blocked, signr);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
return 1;
}
arch/ppc64/kernel/Makefile
View file @ 81e7009e
......@@ -15,7 +15,7 @@ obj-y += irq.o idle.o dma.o \
time.o signal.o \
align.o bitops.o pacaData.o \
udbg.o ioctl32.o \
ptrace32.o signal32.o rtc.o \
ptrace32.o rtc.o \
cpu_setup_power4.o \
iommu.o sysfs.o vdso.o pmc.o firmware.o
obj-y += vdso32/ vdso64/
......
include/asm-ppc64/ppc32.h
View file @ 81e7009e
......@@ -70,18 +70,18 @@ typedef struct compat_siginfo {
#define __old_sigaction32 old_sigaction32
struct __old_sigaction32 {
unsigned sa_handler;
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
unsigned int sa_flags;
unsigned sa_restorer; /* not used by Linux/SPARC yet */
compat_uptr_t sa_restorer; /* not used by Linux/SPARC yet */
};
struct sigaction32 {
unsigned int sa_handler; /* Really a pointer, but need to deal with 32 bits */
compat_uptr_t sa_handler; /* Really a pointer, but need to deal with 32 bits */
unsigned int sa_flags;
unsigned int sa_restorer; /* Another 32 bit pointer */
compat_uptr_t sa_restorer; /* Another 32 bit pointer */
compat_sigset_t sa_mask; /* A 32 bit mask */
};
......@@ -94,9 +94,9 @@ typedef struct sigaltstack_32 {
struct sigcontext32 {
unsigned int _unused[4];
int signal;
unsigned int handler;
compat_uptr_t handler;
unsigned int oldmask;
u32 regs; /* 4 byte pointer to the pt_regs32 structure. */
compat_uptr_t regs; /* 4 byte pointer to the pt_regs32 structure. */
};
struct mcontext32 {
......@@ -111,7 +111,7 @@ struct ucontext32 {
unsigned int uc_link;
stack_32_t uc_stack;
int uc_pad[7];
u32 uc_regs; /* points to uc_mcontext field */
compat_uptr_t uc_regs; /* points to uc_mcontext field */
compat_sigset_t uc_sigmask; /* mask last for extensibility */
/* glibc has 1024-bit signal masks, ours are 64-bit */
int uc_maskext[30];
......
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