compat_sigset_t mask;
/* __siginfo_fpu_t * */ u32 fpu_save;
unsigned int insns[2];
- stack_t32 stack;
+ compat_stack_t stack;
unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
/* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
siginfo_extra_v8plus_t v8plus;
asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
{
struct rt_signal_frame32 __user *sf;
- unsigned int psr, pc, npc, u_ss_sp;
+ unsigned int psr, pc, npc;
compat_uptr_t fpu_save;
compat_uptr_t rwin_save;
- mm_segment_t old_fs;
sigset_t set;
compat_sigset_t seta;
- stack_t st;
int err, i;
/* Always make any pending restarted system calls return -EINTR */
if (!err && fpu_save)
err |= restore_fpu_state(regs, compat_ptr(fpu_save));
err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
- err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
- st.ss_sp = compat_ptr(u_ss_sp);
- err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
- err |= __get_user(st.ss_size, &sf->stack.ss_size);
+ err |= compat_restore_altstack(&sf->stack);
if (err)
goto segv;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
- set_fs(old_fs);
-
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(compat_ptr(rwin_save)))
return 0;
}
-static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
+static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp;
return (void __user *) -1L;
/* This is the X/Open sanctioned signal stack switching. */
- if (sa->sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(sp) == 0)
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
-
- sp -= framesize;
+ sp = sigsp(sp, ksig) - framesize;
/* Always align the stack frame. This handles two cases. First,
* sigaltstack need not be mindful of platform specific stack
}
-static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
- int signo, sigset_t *oldset)
+static int setup_frame32(struct ksignal *ksig, struct pt_regs *regs,
+ sigset_t *oldset)
{
struct signal_frame32 __user *sf;
int i, err, wsaved;
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct signal_frame32 __user *)
- get_sigframe(&ka->sa, regs, sigframe_size);
+ get_sigframe(ksig, regs, sigframe_size);
- if (invalid_frame_pointer(sf, sigframe_size))
- goto sigill;
+ if (invalid_frame_pointer(sf, sigframe_size)) {
+ do_exit(SIGILL);
+ return -EINVAL;
+ }
tail = (sf + 1);
err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
}
if (err)
- goto sigsegv;
+ return err;
/* 3. signal handler back-trampoline and parameters */
regs->u_regs[UREG_FP] = (unsigned long) sf;
- regs->u_regs[UREG_I0] = signo;
+ regs->u_regs[UREG_I0] = ksig->sig;
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
/* 4. signal handler */
- regs->tpc = (unsigned long) ka->sa.sa_handler;
+ regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
}
/* 5. return to kernel instructions */
- if (ka->ka_restorer) {
- regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ if (ksig->ka.ka_restorer) {
+ regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
} else {
unsigned long address = ((unsigned long)&(sf->insns[0]));
err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
if (err)
- goto sigsegv;
+ return err;
flush_signal_insns(address);
}
return 0;
-
-sigill:
- do_exit(SIGILL);
- return -EINVAL;
-
-sigsegv:
- force_sigsegv(signo, current);
- return -EFAULT;
}
-static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
- unsigned long signr, sigset_t *oldset,
- siginfo_t *info)
+static int setup_rt_frame32(struct ksignal *ksig, struct pt_regs *regs,
+ sigset_t *oldset)
{
struct rt_signal_frame32 __user *sf;
int i, err, wsaved;
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame32 __user *)
- get_sigframe(&ka->sa, regs, sigframe_size);
+ get_sigframe(ksig, regs, sigframe_size);
- if (invalid_frame_pointer(sf, sigframe_size))
- goto sigill;
+ if (invalid_frame_pointer(sf, sigframe_size)) {
+ do_exit(SIGILL);
+ return -EINVAL;
+ }
tail = (sf + 1);
}
/* Update the siginfo structure. */
- err |= copy_siginfo_to_user32(&sf->info, info);
+ err |= copy_siginfo_to_user32(&sf->info, &ksig->info);
/* Setup sigaltstack */
- err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
- err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
+ err |= __compat_save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
switch (_NSIG_WORDS) {
case 4: seta.sig[7] = (oldset->sig[3] >> 32);
err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
}
if (err)
- goto sigsegv;
+ return err;
/* 3. signal handler back-trampoline and parameters */
regs->u_regs[UREG_FP] = (unsigned long) sf;
- regs->u_regs[UREG_I0] = signr;
+ regs->u_regs[UREG_I0] = ksig->sig;
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
/* 4. signal handler */
- regs->tpc = (unsigned long) ka->sa.sa_handler;
+ regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
regs->tnpc = (regs->tpc + 4);
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
}
/* 5. return to kernel instructions */
- if (ka->ka_restorer)
- regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+ if (ksig->ka.ka_restorer)
+ regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
else {
unsigned long address = ((unsigned long)&(sf->insns[0]));
/* t 0x10 */
err |= __put_user(0x91d02010, &sf->insns[1]);
if (err)
- goto sigsegv;
+ return err;
flush_signal_insns(address);
}
return 0;
-
-sigill:
- do_exit(SIGILL);
- return -EINVAL;
-
-sigsegv:
- force_sigsegv(signr, current);
- return -EFAULT;
}
-static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
- siginfo_t *info,
- sigset_t *oldset, struct pt_regs *regs)
+static inline void handle_signal32(struct ksignal *ksig,
+ struct pt_regs *regs)
{
+ sigset_t *oldset = sigmask_to_save();
int err;
- if (ka->sa.sa_flags & SA_SIGINFO)
- err = setup_rt_frame32(ka, regs, signr, oldset, info);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err = setup_rt_frame32(ksig, regs, oldset);
else
- err = setup_frame32(ka, regs, signr, oldset);
-
- if (err)
- return;
+ err = setup_frame32(ksig, regs, oldset);
- signal_delivered(signr, info, ka, regs, 0);
+ signal_setup_done(err, ksig, 0);
}
static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-void do_signal32(sigset_t *oldset, struct pt_regs * regs)
+void do_signal32(struct pt_regs * regs)
{
- struct k_sigaction ka;
- unsigned long orig_i0;
- int restart_syscall;
- siginfo_t info;
- int signr;
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ struct ksignal ksig;
+ unsigned long orig_i0 = 0;
+ int restart_syscall = 0;
+ bool has_handler = get_signal(&ksig);
- restart_syscall = 0;
- orig_i0 = 0;
if (pt_regs_is_syscall(regs) &&
(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
restart_syscall = 1;
orig_i0 = regs->u_regs[UREG_G6];
}
- if (signr > 0) {
+ if (has_handler) {
if (restart_syscall)
- syscall_restart32(orig_i0, regs, &ka.sa);
- handle_signal32(signr, &ka, &info, oldset, regs);
- return;
- }
- if (restart_syscall &&
- (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
- regs->u_regs[UREG_I0] == ERESTARTSYS ||
- regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
- /* replay the system call when we are done */
- regs->u_regs[UREG_I0] = orig_i0;
- regs->tpc -= 4;
- regs->tnpc -= 4;
- pt_regs_clear_syscall(regs);
- }
- if (restart_syscall &&
- regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
- regs->u_regs[UREG_G1] = __NR_restart_syscall;
- regs->tpc -= 4;
- regs->tnpc -= 4;
- pt_regs_clear_syscall(regs);
+ syscall_restart32(orig_i0, regs, &ksig.ka.sa);
+ handle_signal32(&ksig, regs);
+ } else {
+ if (restart_syscall) {
+ switch (regs->u_regs[UREG_I0]) {
+ case ERESTARTNOHAND:
+ case ERESTARTSYS:
+ case ERESTARTNOINTR:
+ /* replay the system call when we are done */
+ regs->u_regs[UREG_I0] = orig_i0;
+ regs->tpc -= 4;
+ regs->tnpc -= 4;
+ pt_regs_clear_syscall(regs);
+ case ERESTART_RESTARTBLOCK:
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->tpc -= 4;
+ regs->tnpc -= 4;
+ pt_regs_clear_syscall(regs);
+ }
+ }
+ restore_saved_sigmask();
}
-
- /* If there's no signal to deliver, we just put the saved sigmask
- * back
- */
- restore_saved_sigmask();
}
struct sigstack32 {
out:
return ret;
}
-
-asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
-{
- stack_t uss, uoss;
- u32 u_ss_sp = 0;
- int ret;
- mm_segment_t old_fs;
- stack_t32 __user *uss32 = compat_ptr(ussa);
- stack_t32 __user *uoss32 = compat_ptr(uossa);
-
- if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) ||
- __get_user(uss.ss_flags, &uss32->ss_flags) ||
- __get_user(uss.ss_size, &uss32->ss_size)))
- return -EFAULT;
- uss.ss_sp = compat_ptr(u_ss_sp);
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL,
- uossa ? (stack_t __user *) &uoss : NULL, sp);
- set_fs(old_fs);
- if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) ||
- __put_user(uoss.ss_flags, &uoss32->ss_flags) ||
- __put_user(uoss.ss_size, &uoss32->ss_size)))
- return -EFAULT;
- return ret;
-}
projects / ~andy / linux / blobdiff