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authorStephen Rothwell <sfr@canb.auug.org.au>2005-10-18 11:17:58 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2005-10-18 11:17:58 +1000
commit81e7009ea46c951860b8716ee427ff4f54dd26fc (patch)
treecd9724dac4d04a2e03f4042adbcc86fdc2d037b7 /arch/ppc64
parent55d363397f1bdfa4fe861f0e2fadb058c79dafea (diff)
powerpc: merge ppc signal.c and ppc64 signal32.c
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/ppc64')
-rw-r--r--arch/ppc64/kernel/Makefile2
-rw-r--r--arch/ppc64/kernel/signal32.c998
2 files changed, 1 insertions, 999 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 0be7c7ecefd..19846d78b32 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -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/
diff --git a/arch/ppc64/kernel/signal32.c b/arch/ppc64/kernel/signal32.c
deleted file mode 100644
index a8b7a5a56bb..00000000000
--- a/arch/ppc64/kernel/signal32.c
+++ /dev/null
@@ -1,998 +0,0 @@
-/*
- * signal32.c: Support 32bit signal syscalls.
- *
- * 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.
- *
- * 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/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>
-#include <linux/compat.h>
-#include <linux/ptrace.h>
-#include <asm/ppc32.h>
-#include <asm/uaccess.h>
-#include <asm/ppcdebug.h>
-#include <asm/unistd.h>
-#include <asm/cacheflush.h>
-#include <asm/vdso.h>
-
-#define DEBUG_SIG 0
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-#define GP_REGS_SIZE32 min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
-
-/*
- * 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
- *
- * Each of these things must be a multiple of 16 bytes in size.
- *
- */
-struct sigregs32 {
- struct mcontext32 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_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
- * 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;
- /*
- * 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];
-};
-
-
-/*
- * 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.
- */
-static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame, int sigret)
-{
- elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
- int i, err = 0;
-
- /* 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)
- return 1;
-
- current->thread.fpscr = 0; /* turn off all fp exceptions */
-
-#ifdef CONFIG_ALTIVEC
- /* save altivec registers */
- if (current->thread.used_vr) {
- flush_altivec_to_thread(current);
- if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
- ELF_NVRREG32 * 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 */
-
- 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 long restore_user_regs(struct pt_regs *regs,
- struct mcontext32 __user *sr, int sig)
-{
- elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
- int i;
- long err = 0;
- unsigned int save_r2 = 0;
-#ifdef CONFIG_ALTIVEC
- unsigned long msr;
-#endif
-
- /*
- * restore general registers but not including MSR or SOFTE. Also
- * take care of keeping r2 (TLS) intact if not a signal
- */
- 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]);
- }
- if (!sig)
- regs->gpr[2] = (unsigned long) save_r2;
- if (err)
- return 1;
-
- /* 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_NVRREG32 * sizeof(vector128));
-
- /* Always get VRSAVE back */
- if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
- return 1;
-#endif /* CONFIG_ALTIVEC */
-
-#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;
- 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
- */
-
-
-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))
- return -EINVAL;
-
- if (act) {
- compat_uptr_t handler;
-
- 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_user(new_ka.sa.sa_flags, &act->sa_flags);
- if (ret)
- return -EFAULT;
- }
-
- 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_user(old_ka.sa.sa_flags, &oact->sa_flags);
- }
- return ret;
-}
-
-/*
- * Note: it is necessary to treat how as an unsigned int, with the
- * corresponding cast to a signed int to insure that the proper
- * conversion (sign extension) between the register representation
- * of a signed int (msr in 32-bit mode) and the register representation
- * of a signed int (msr in 64-bit mode) is performed.
- */
-long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
- compat_sigset_t __user *oset, size_t sigsetsize)
-{
- 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);
- }
-
- 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);
- 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)))
- return -EFAULT;
- }
- return 0;
-}
-
-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();
-
- set_fs(KERNEL_DS);
- /* The __user pointer cast is valid because of the set_fs() */
- 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)))
- return -EFAULT;
- }
- return ret;
-}
-
-
-int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
-{
- int err;
-
- if (!access_ok (VERIFY_WRITE, d, sizeof(*d)))
- return -EFAULT;
-
- /* If you change siginfo_t structure, please be sure
- * this code is fixed accordingly.
- * It should never copy any pad contained in the structure
- * to avoid security leaks, but must copy the generic
- * 3 ints plus the relevant union member.
- * This routine must convert siginfo from 64bit to 32bit as well
- * at the same time.
- */
- err = __put_user(s->si_signo, &d->si_signo);
- err |= __put_user(s->si_errno, &d->si_errno);
- err |= __put_user((short)s->si_code, &d->si_code);
- if (s->si_code < 0)
- err |= __copy_to_user(&d->_sifields._pad, &s->_sifields._pad,
- SI_PAD_SIZE32);
- else switch(s->si_code >> 16) {
- case __SI_CHLD >> 16:
- err |= __put_user(s->si_pid, &d->si_pid);
- err |= __put_user(s->si_uid, &d->si_uid);
- err |= __put_user(s->si_utime, &d->si_utime);
- err |= __put_user(s->si_stime, &d->si_stime);
- err |= __put_user(s->si_status, &d->si_status);
- break;
- case __SI_FAULT >> 16:
- err |= __put_user((unsigned int)(unsigned long)s->si_addr,
- &d->si_addr);
- break;
- case __SI_POLL >> 16:
- err |= __put_user(s->si_band, &d->si_band);
- err |= __put_user(s->si_fd, &d->si_fd);
- break;
- case __SI_TIMER >> 16:
- err |= __put_user(s->si_tid, &d->si_tid);
- err |= __put_user(s->si_overrun, &d->si_overrun);
- err |= __put_user(s->si_int, &d->si_int);
- break;
- case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
- case __SI_MESGQ >> 16:
- err |= __put_user(s->si_int, &d->si_int);
- /* fallthrough */
- case __SI_KILL >> 16:
- default:
- err |= __put_user(s->si_pid, &d->si_pid);
- err |= __put_user(s->si_uid, &d->si_uid);
- break;
- }
- return err;
-}
-
-/*
- * 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
- * (sign extension) between the register representation of a signed int
- * (msr in 32-bit mode) and the register representation of a signed int
- * (msr in 64-bit mode) is performed.
- */
-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;
- set_fs (KERNEL_DS);
- /* The __user pointer cast is valid becasuse of the set_fs() */
- ret = sys_rt_sigqueueinfo((int)pid, (int)sig, (siginfo_t __user *) &info);
- 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
- *
- * System Calls
- * sigaltatck sys32_sigaltstack
- */
-
-int sys32_sigaltstack(u32 __new, u32 __old, int r5,
- int r6, int r7, int r8, struct pt_regs *regs)
-{
- stack_32_t __user * newstack = (stack_32_t __user *)(long) __new;
- stack_32_t __user * oldstack = (stack_32_t __user *)(long) __old;
- stack_t uss, uoss;
- int ret;
- mm_segment_t old_fs;
- unsigned long sp;
- compat_uptr_t ss_sp;
-
- /*
- * set sp to the user stack on entry to the system call
- * the system call router sets R9 to the saved registers
- */
- sp = regs->gpr[1];
-
- /* Put new stack info in local 64 bit stack struct */
- if (newstack) {
- if (get_user(ss_sp, &newstack->ss_sp) ||
- __get_user(uss.ss_flags, &newstack->ss_flags) ||
- __get_user(uss.ss_size, &newstack->ss_size))
- return -EFAULT;
- uss.ss_sp = compat_ptr(ss_sp);
- }
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- /* The __user pointer casts are valid because of the set_fs() */
- ret = do_sigaltstack(
- newstack ? (stack_t __user *) &uss : NULL,
- oldstack ? (stack_t __user *) &uoss : NULL,
- sp);
- set_fs(old_fs);
- /* Copy the stack information to the user output buffer */
- if (!ret && oldstack &&
- (put_user((long)uoss.ss_sp, &oldstack->ss_sp) ||
- __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
- __put_user(uoss.ss_size, &oldstack->ss_size)))
- return -EFAULT;
- return ret;
-}
-
-
-/*
- * 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)
-{
- struct rt_sigframe32 __user *rt_sf;
- struct mcontext32 __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;
-
- /* create a stack frame for the caller of the handler */
- newsp -= __SIGNAL_FRAMESIZE32 + 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)
- || __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)))
- 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;
-
- 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 {
- if (save_user_regs(regs, frame, __NR_rt_sigreturn))
- goto badframe;
- regs->link = (unsigned long) frame->tramp;
- }
- regs->gpr[1] = (unsigned long) 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->trap = 0;
- regs->result = 0;
-
- if (test_thread_flag(TIF_SINGLESTEP))
- ptrace_notify(SIGTRAP);
-
- return 1;
-
-badframe:
-#if DEBUG_SIG
- printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
- regs, frame, newsp);
-#endif
- force_sigsegv(sig, current);
- return 0;
-}
-
-static long do_setcontext32(struct ucontext32 __user *ucp, struct pt_regs *regs, int sig)
-{
- compat_sigset_t c_set;
- sigset_t set;
- u32 mcp;
-
- if (__copy_from_user(&c_set, &ucp->uc_sigmask, sizeof(c_set))
- || __get_user(mcp, &ucp->uc_regs))
- return -EFAULT;
- sigset_from_compat(&set, &c_set);
- restore_sigmask(&set);
- if (restore_user_regs(regs, (struct mcontext32 __user *)(u64)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,
- 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))
- 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))
- 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_setcontext32(new_ctx, regs, 0))
- do_exit(SIGSEGV);
-
- return 0;
-}
-
-long sys32_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;
-
-
- /* 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);
- if (!access_ok(VERIFY_READ, rt_sf, sizeof(*rt_sf)))
- goto bad;
- if (do_setcontext32(&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
- * 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;
-
- bad:
- force_sig(SIGSEGV, current);
- return 0;
-}
-
-
-/*
- * 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)
-{
- struct sigcontext32 __user *sc;
- struct sigregs32 __user *frame;
- unsigned long origsp = newsp;
-
- /* Set up Signal Frame */
- newsp -= sizeof(struct sigregs32);
- frame = (struct sigregs32 __user *) newsp;
-
- /* Put a sigcontext on the stack */
- newsp -= sizeof(*sc);
- sc = (struct sigcontext32 __user *) newsp;
-
- /* create a stack frame for the caller of the handler */
- newsp -= __SIGNAL_FRAMESIZE32;
-
- if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
- goto badframe;
-
-#if _NSIG != 64
-#error "Please adjust handle_signal32()"
-#endif
- if (__put_user((u32)(u64)ka->sa.sa_handler, &sc->handler)
- || __put_user(oldset->sig[0], &sc->oldmask)
- || __put_user((oldset->sig[0] >> 32), &sc->_unused[3])
- || __put_user((u32)(u64)frame, &sc->regs)
- || __put_user(sig, &sc->signal))
- goto badframe;
-
- 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 {
- if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
- goto badframe;
- regs->link = (unsigned long) frame->mctx.tramp;
- }
-
- if (put_user(regs->gpr[1], (u32 __user *)newsp))
- goto badframe;
- regs->gpr[1] = (unsigned long) newsp;
- regs->gpr[3] = sig;
- regs->gpr[4] = (unsigned long) sc;
- regs->nip = (unsigned long) ka->sa.sa_handler;
- regs->trap = 0;
- regs->result = 0;
-
- if (test_thread_flag(TIF_SINGLESTEP))
- ptrace_notify(SIGTRAP);
-
- return 1;
-
-badframe:
-#if DEBUG_SIG
- printk("badframe in handle_signal, regs=%p frame=%x newsp=%x\n",
- regs, frame, *newspp);
-#endif
- force_sigsegv(sig, current);
- return 0;
-}
-
-/*
- * Do a signal return; undo the signal stack.
- */
-long sys32_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;
- 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);
- if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
- goto badframe;
-
- /*
- * 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);
- restore_sigmask(&set);
-
- sr = (struct mcontext32 __user *)(u64)sigctx.regs;
- if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
- || restore_user_regs(regs, sr, 1))
- goto badframe;
-
- ret = regs->result;
- return ret;
-
-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)
-{
- siginfo_t info;
- unsigned int frame, newsp;
- int signr, ret;
- struct k_sigaction ka;
-
- if (!oldset)
- oldset = &current->blocked;
-
- newsp = frame = 0;
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
- 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;
-
- /*
- * Reenable the DABR before delivering the signal to
- * user space. The DABR will have been cleared if it
- * triggered inside the kernel.
- */
- if (current->thread.dabr)
- set_dabr(current->thread.dabr);
-
- /* Whee! Actually deliver the signal. */
- if (ka.sa.sa_flags & SA_SIGINFO)
- ret = handle_rt_signal32(signr, &ka, &info, oldset, regs, newsp);
- else
- ret = handle_signal32(signr, &ka, &info, oldset, regs, newsp);
-
- if (ret) {
- 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 ret;
-}