x86: clean up arch/x86/ia32/ia32_signal.c
White space and coding style clenaup. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
Ingo Molnar
parent
8edf8bee88
commit
99b9cdf758
@ -43,7 +43,8 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
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int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
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{
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int err;
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if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
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if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
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return -EFAULT;
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/* If you change siginfo_t structure, please make sure that
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@ -53,16 +54,19 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
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3 ints plus the relevant union member. */
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err = __put_user(from->si_signo, &to->si_signo);
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err |= __put_user(from->si_errno, &to->si_errno);
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err |= __put_user((short)from->si_code, &to->si_code);
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err |= __put_user((short)from->si_code, &to->si_code);
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if (from->si_code < 0) {
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err |= __put_user(from->si_pid, &to->si_pid);
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err |= __put_user(from->si_uid, &to->si_uid);
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err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
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err |= __put_user(from->si_uid, &to->si_uid);
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err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
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} else {
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/* First 32bits of unions are always present:
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* si_pid === si_band === si_tid === si_addr(LS half) */
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err |= __put_user(from->_sifields._pad[0], &to->_sifields._pad[0]);
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/*
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* First 32bits of unions are always present:
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* si_pid === si_band === si_tid === si_addr(LS half)
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*/
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err |= __put_user(from->_sifields._pad[0],
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&to->_sifields._pad[0]);
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switch (from->si_code >> 16) {
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case __SI_FAULT >> 16:
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break;
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@ -76,14 +80,15 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
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err |= __put_user(from->si_uid, &to->si_uid);
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break;
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case __SI_POLL >> 16:
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err |= __put_user(from->si_fd, &to->si_fd);
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err |= __put_user(from->si_fd, &to->si_fd);
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break;
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case __SI_TIMER >> 16:
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err |= __put_user(from->si_overrun, &to->si_overrun);
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err |= __put_user(from->si_overrun, &to->si_overrun);
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err |= __put_user(ptr_to_compat(from->si_ptr),
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&to->si_ptr);
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&to->si_ptr);
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break;
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case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
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/* This is not generated by the kernel as of now. */
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case __SI_RT >> 16:
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case __SI_MESGQ >> 16:
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err |= __put_user(from->si_uid, &to->si_uid);
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err |= __put_user(from->si_int, &to->si_int);
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@ -97,7 +102,8 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
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{
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int err;
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u32 ptr32;
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if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t)))
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if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
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return -EFAULT;
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err = __get_user(to->si_signo, &from->si_signo);
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@ -112,8 +118,7 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
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return err;
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}
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asmlinkage long
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sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
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asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
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{
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mask &= _BLOCKABLE;
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spin_lock_irq(¤t->sighand->siglock);
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@ -128,36 +133,37 @@ sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
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return -ERESTARTNOHAND;
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}
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asmlinkage long
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sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
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stack_ia32_t __user *uoss_ptr,
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struct pt_regs *regs)
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asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
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stack_ia32_t __user *uoss_ptr,
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struct pt_regs *regs)
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{
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stack_t uss,uoss;
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stack_t uss, uoss;
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int ret;
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mm_segment_t seg;
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if (uss_ptr) {
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mm_segment_t seg;
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if (uss_ptr) {
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u32 ptr;
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memset(&uss,0,sizeof(stack_t));
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if (!access_ok(VERIFY_READ,uss_ptr,sizeof(stack_ia32_t)) ||
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memset(&uss, 0, sizeof(stack_t));
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if (!access_ok(VERIFY_READ, uss_ptr, sizeof(stack_ia32_t)) ||
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__get_user(ptr, &uss_ptr->ss_sp) ||
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__get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
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__get_user(uss.ss_size, &uss_ptr->ss_size))
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return -EFAULT;
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uss.ss_sp = compat_ptr(ptr);
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}
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seg = get_fs();
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set_fs(KERNEL_DS);
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seg = get_fs();
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set_fs(KERNEL_DS);
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ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->rsp);
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set_fs(seg);
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set_fs(seg);
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if (ret >= 0 && uoss_ptr) {
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if (!access_ok(VERIFY_WRITE,uoss_ptr,sizeof(stack_ia32_t)) ||
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if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t)) ||
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__put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
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__put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
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__put_user(uoss.ss_size, &uoss_ptr->ss_size))
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ret = -EFAULT;
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}
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return ret;
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}
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return ret;
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}
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/*
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@ -186,18 +192,6 @@ struct rt_sigframe
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char retcode[8];
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};
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static int
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ia32_restore_sigcontext(struct pt_regs *regs, struct sigcontext_ia32 __user *sc, unsigned int *peax)
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{
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unsigned int err = 0;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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#if DEBUG_SIG
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printk("SIG restore_sigcontext: sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
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sc, sc->err, sc->eip, sc->cs, sc->eflags);
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#endif
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#define COPY(x) { \
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unsigned int reg; \
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err |= __get_user(reg, &sc->e ##x); \
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@ -205,68 +199,78 @@ ia32_restore_sigcontext(struct pt_regs *regs, struct sigcontext_ia32 __user *sc,
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}
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#define RELOAD_SEG(seg,mask) \
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{ unsigned int cur; \
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{ unsigned int cur; \
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unsigned short pre; \
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err |= __get_user(pre, &sc->seg); \
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asm volatile("movl %%" #seg ",%0" : "=r" (cur)); \
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pre |= mask; \
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if (pre != cur) loadsegment(seg,pre); }
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asm volatile("movl %%" #seg ",%0" : "=r" (cur)); \
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pre |= mask; \
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if (pre != cur) loadsegment(seg, pre); }
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/* Reload fs and gs if they have changed in the signal handler.
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This does not handle long fs/gs base changes in the handler, but
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does not clobber them at least in the normal case. */
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{
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unsigned gs, oldgs;
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err |= __get_user(gs, &sc->gs);
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gs |= 3;
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asm("movl %%gs,%0" : "=r" (oldgs));
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if (gs != oldgs)
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load_gs_index(gs);
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}
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RELOAD_SEG(fs,3);
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RELOAD_SEG(ds,3);
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RELOAD_SEG(es,3);
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static int ia32_restore_sigcontext(struct pt_regs *regs,
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struct sigcontext_ia32 __user *sc,
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unsigned int *peax)
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{
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unsigned int tmpflags, gs, oldgs, err = 0;
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struct _fpstate_ia32 __user *buf;
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u32 tmp;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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#if DEBUG_SIG
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printk(KERN_DEBUG "SIG restore_sigcontext: "
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"sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
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sc, sc->err, sc->eip, sc->cs, sc->eflags);
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#endif
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/*
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* Reload fs and gs if they have changed in the signal
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* handler. This does not handle long fs/gs base changes in
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* the handler, but does not clobber them at least in the
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* normal case.
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*/
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err |= __get_user(gs, &sc->gs);
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gs |= 3;
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asm("movl %%gs,%0" : "=r" (oldgs));
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if (gs != oldgs)
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load_gs_index(gs);
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RELOAD_SEG(fs, 3);
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RELOAD_SEG(ds, 3);
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RELOAD_SEG(es, 3);
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COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
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COPY(dx); COPY(cx); COPY(ip);
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/* Don't touch extended registers */
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err |= __get_user(regs->cs, &sc->cs);
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regs->cs |= 3;
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err |= __get_user(regs->ss, &sc->ss);
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regs->ss |= 3;
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/* Don't touch extended registers */
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{
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unsigned int tmpflags;
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err |= __get_user(tmpflags, &sc->eflags);
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regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
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regs->orig_rax = -1; /* disable syscall checks */
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}
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err |= __get_user(regs->cs, &sc->cs);
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regs->cs |= 3;
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err |= __get_user(regs->ss, &sc->ss);
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regs->ss |= 3;
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{
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u32 tmp;
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struct _fpstate_ia32 __user * buf;
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err |= __get_user(tmp, &sc->fpstate);
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buf = compat_ptr(tmp);
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if (buf) {
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if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
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goto badframe;
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err |= restore_i387_ia32(current, buf, 0);
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} else {
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struct task_struct *me = current;
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if (used_math()) {
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clear_fpu(me);
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clear_used_math();
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}
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err |= __get_user(tmpflags, &sc->eflags);
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regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
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/* disable syscall checks */
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regs->orig_rax = -1;
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err |= __get_user(tmp, &sc->fpstate);
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buf = compat_ptr(tmp);
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if (buf) {
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if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
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goto badframe;
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err |= restore_i387_ia32(current, buf, 0);
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} else {
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struct task_struct *me = current;
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if (used_math()) {
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clear_fpu(me);
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clear_used_math();
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}
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}
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{
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u32 tmp;
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err |= __get_user(tmp, &sc->eax);
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*peax = tmp;
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}
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err |= __get_user(tmp, &sc->eax);
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*peax = tmp;
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return err;
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badframe:
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@ -283,7 +287,8 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
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goto badframe;
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if (__get_user(set.sig[0], &frame->sc.oldmask)
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|| (_COMPAT_NSIG_WORDS > 1
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&& __copy_from_user((((char *) &set.sig) + 4), &frame->extramask,
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&& __copy_from_user((((char *) &set.sig) + 4),
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&frame->extramask,
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sizeof(frame->extramask))))
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goto badframe;
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@ -292,7 +297,7 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
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current->blocked = set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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if (ia32_restore_sigcontext(regs, &frame->sc, &eax))
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goto badframe;
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return eax;
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@ -300,7 +305,7 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
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badframe:
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signal_fault(regs, frame, "32bit sigreturn");
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return 0;
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}
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}
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asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
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{
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@ -321,7 +326,7 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
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current->blocked = set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
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goto badframe;
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@ -332,17 +337,17 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
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return eax;
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badframe:
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signal_fault(regs,frame,"32bit rt sigreturn");
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signal_fault(regs, frame, "32bit rt sigreturn");
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return 0;
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}
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}
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/*
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* Set up a signal frame.
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*/
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static int
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ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
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struct pt_regs *regs, unsigned int mask)
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static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
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struct _fpstate_ia32 __user *fpstate,
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struct pt_regs *regs, unsigned int mask)
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{
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int tmp, err = 0;
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@ -375,7 +380,7 @@ ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __
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tmp = save_i387_ia32(current, fpstate, regs, 0);
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if (tmp < 0)
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err = -EFAULT;
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else {
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else {
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clear_used_math();
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stts();
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err |= __put_user(ptr_to_compat(tmp ? fpstate : NULL),
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@ -392,8 +397,8 @@ ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __
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/*
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* Determine which stack to use..
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*/
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static void __user *
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get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
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static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
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size_t frame_size)
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{
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unsigned long rsp;
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@ -409,9 +414,8 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
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/* This is the legacy signal stack switching. */
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else if ((regs->ss & 0xffff) != __USER_DS &&
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!(ka->sa.sa_flags & SA_RESTORER) &&
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ka->sa.sa_restorer) {
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ka->sa.sa_restorer)
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rsp = (unsigned long) ka->sa.sa_restorer;
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}
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rsp -= frame_size;
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/* Align the stack pointer according to the i386 ABI,
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@ -421,11 +425,25 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
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}
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int ia32_setup_frame(int sig, struct k_sigaction *ka,
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compat_sigset_t *set, struct pt_regs * regs)
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compat_sigset_t *set, struct pt_regs *regs)
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{
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struct sigframe __user *frame;
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void __user *restorer;
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int err = 0;
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/* copy_to_user optimizes that into a single 8 byte store */
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static const struct {
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u16 poplmovl;
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u32 val;
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u16 int80;
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u16 pad;
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} __attribute__((packed)) code = {
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0xb858, /* popl %eax ; movl $...,%eax */
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__NR_ia32_sigreturn,
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0x80cd, /* int $0x80 */
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0,
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};
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frame = get_sigframe(ka, regs, sizeof(*frame));
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if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
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@ -443,38 +461,24 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
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if (_COMPAT_NSIG_WORDS > 1) {
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err |= __copy_to_user(frame->extramask, &set->sig[1],
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sizeof(frame->extramask));
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if (err)
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goto give_sigsegv;
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}
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if (err)
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goto give_sigsegv;
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/* Return stub is in 32bit vsyscall page */
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{
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void __user *restorer;
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if (current->binfmt->hasvdso)
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restorer = VSYSCALL32_SIGRETURN;
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else
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restorer = (void *)&frame->retcode;
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if (ka->sa.sa_flags & SA_RESTORER)
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restorer = ka->sa.sa_restorer;
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err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
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}
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/* These are actually not used anymore, but left because some
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gdb versions depend on them as a marker. */
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{
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/* copy_to_user optimizes that into a single 8 byte store */
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static const struct {
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u16 poplmovl;
|
||||
u32 val;
|
||||
u16 int80;
|
||||
u16 pad;
|
||||
} __attribute__((packed)) code = {
|
||||
0xb858, /* popl %eax ; movl $...,%eax */
|
||||
__NR_ia32_sigreturn,
|
||||
0x80cd, /* int $0x80 */
|
||||
0,
|
||||
};
|
||||
err |= __copy_to_user(frame->retcode, &code, 8);
|
||||
}
|
||||
if (current->binfmt->hasvdso)
|
||||
restorer = VSYSCALL32_SIGRETURN;
|
||||
else
|
||||
restorer = (void *)&frame->retcode;
|
||||
if (ka->sa.sa_flags & SA_RESTORER)
|
||||
restorer = ka->sa.sa_restorer;
|
||||
err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
|
||||
|
||||
/*
|
||||
* These are actually not used anymore, but left because some
|
||||
* gdb versions depend on them as a marker.
|
||||
*/
|
||||
err |= __copy_to_user(frame->retcode, &code, 8);
|
||||
if (err)
|
||||
goto give_sigsegv;
|
||||
|
||||
@ -487,11 +491,11 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
|
||||
regs->rdx = 0;
|
||||
regs->rcx = 0;
|
||||
|
||||
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
|
||||
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
|
||||
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
|
||||
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
|
||||
|
||||
regs->cs = __USER32_CS;
|
||||
regs->ss = __USER32_DS;
|
||||
regs->cs = __USER32_CS;
|
||||
regs->ss = __USER32_DS;
|
||||
|
||||
set_fs(USER_DS);
|
||||
regs->eflags &= ~TF_MASK;
|
||||
@ -499,8 +503,8 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
|
||||
ptrace_notify(SIGTRAP);
|
||||
|
||||
#if DEBUG_SIG
|
||||
printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
|
||||
current->comm, current->pid, frame, regs->rip, frame->pretcode);
|
||||
printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
|
||||
current->comm, current->pid, frame, regs->rip, frame->pretcode);
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
@ -511,25 +515,34 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
|
||||
}
|
||||
|
||||
int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
|
||||
compat_sigset_t *set, struct pt_regs * regs)
|
||||
compat_sigset_t *set, struct pt_regs *regs)
|
||||
{
|
||||
struct rt_sigframe __user *frame;
|
||||
struct exec_domain *ed = current_thread_info()->exec_domain;
|
||||
void __user *restorer = VSYSCALL32_RTSIGRETURN;
|
||||
int err = 0;
|
||||
|
||||
/* __copy_to_user optimizes that into a single 8 byte store */
|
||||
static const struct {
|
||||
u8 movl;
|
||||
u32 val;
|
||||
u16 int80;
|
||||
u16 pad;
|
||||
u8 pad2;
|
||||
} __attribute__((packed)) code = {
|
||||
0xb8,
|
||||
__NR_ia32_rt_sigreturn,
|
||||
0x80cd,
|
||||
0,
|
||||
};
|
||||
|
||||
frame = get_sigframe(ka, regs, sizeof(*frame));
|
||||
|
||||
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
|
||||
goto give_sigsegv;
|
||||
|
||||
{
|
||||
struct exec_domain *ed = current_thread_info()->exec_domain;
|
||||
err |= __put_user((ed
|
||||
&& ed->signal_invmap
|
||||
&& sig < 32
|
||||
? ed->signal_invmap[sig]
|
||||
: sig),
|
||||
&frame->sig);
|
||||
}
|
||||
err |= __put_user((ed && ed->signal_invmap && sig < 32
|
||||
? ed->signal_invmap[sig] : sig), &frame->sig);
|
||||
err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo);
|
||||
err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc);
|
||||
err |= copy_siginfo_to_user32(&frame->info, info);
|
||||
@ -544,38 +557,20 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
|
||||
&frame->uc.uc_stack.ss_flags);
|
||||
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
|
||||
err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
|
||||
regs, set->sig[0]);
|
||||
regs, set->sig[0]);
|
||||
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
|
||||
if (err)
|
||||
goto give_sigsegv;
|
||||
|
||||
|
||||
{
|
||||
void __user *restorer = VSYSCALL32_RTSIGRETURN;
|
||||
if (ka->sa.sa_flags & SA_RESTORER)
|
||||
restorer = ka->sa.sa_restorer;
|
||||
err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
|
||||
}
|
||||
if (ka->sa.sa_flags & SA_RESTORER)
|
||||
restorer = ka->sa.sa_restorer;
|
||||
err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
|
||||
|
||||
/* This is movl $,%eax ; int $0x80 */
|
||||
/* Not actually used anymore, but left because some gdb versions
|
||||
need it. */
|
||||
{
|
||||
/* __copy_to_user optimizes that into a single 8 byte store */
|
||||
static const struct {
|
||||
u8 movl;
|
||||
u32 val;
|
||||
u16 int80;
|
||||
u16 pad;
|
||||
u8 pad2;
|
||||
} __attribute__((packed)) code = {
|
||||
0xb8,
|
||||
__NR_ia32_rt_sigreturn,
|
||||
0x80cd,
|
||||
0,
|
||||
};
|
||||
err |= __copy_to_user(frame->retcode, &code, 8);
|
||||
}
|
||||
/*
|
||||
* Not actually used anymore, but left because some gdb
|
||||
* versions need it.
|
||||
*/
|
||||
err |= __copy_to_user(frame->retcode, &code, 8);
|
||||
if (err)
|
||||
goto give_sigsegv;
|
||||
|
||||
@ -593,11 +588,11 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
|
||||
regs->rdx = (unsigned long) &frame->info;
|
||||
regs->rcx = (unsigned long) &frame->uc;
|
||||
|
||||
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
|
||||
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
|
||||
|
||||
regs->cs = __USER32_CS;
|
||||
regs->ss = __USER32_DS;
|
||||
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
|
||||
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
|
||||
|
||||
regs->cs = __USER32_CS;
|
||||
regs->ss = __USER32_DS;
|
||||
|
||||
set_fs(USER_DS);
|
||||
regs->eflags &= ~TF_MASK;
|
||||
@ -605,8 +600,8 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
|
||||
ptrace_notify(SIGTRAP);
|
||||
|
||||
#if DEBUG_SIG
|
||||
printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
|
||||
current->comm, current->pid, frame, regs->rip, frame->pretcode);
|
||||
printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
|
||||
current->comm, current->pid, frame, regs->rip, frame->pretcode);
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user