summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/signal_32.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/kernel/signal_32.c')
-rw-r--r--arch/sparc/kernel/signal_32.c175
1 files changed, 61 insertions, 114 deletions
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c
index 68f9c8650af4..7d5d8e1f8415 100644
--- a/arch/sparc/kernel/signal_32.c
+++ b/arch/sparc/kernel/signal_32.c
@@ -59,18 +59,6 @@ struct rt_signal_frame {
#define SF_ALIGNEDSZ (((sizeof(struct signal_frame) + 7) & (~7)))
#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame) + 7) & (~7)))
-static int _sigpause_common(old_sigset_t set)
-{
- sigset_t blocked;
- siginitset(&blocked, set);
- return sigsuspend(&blocked);
-}
-
-asmlinkage int sys_sigsuspend(old_sigset_t set)
-{
- return _sigpause_common(set);
-}
-
asmlinkage void do_sigreturn(struct pt_regs *regs)
{
struct signal_frame __user *sf;
@@ -141,9 +129,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
unsigned int psr, pc, npc;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
- mm_segment_t old_fs;
sigset_t set;
- stack_t st;
int err;
synchronize_user_stack();
@@ -171,8 +157,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
if (!err && fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
-
- err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
+ err |= restore_altstack(&sf->stack);
if (err)
goto segv;
@@ -180,14 +165,6 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
regs->pc = pc;
regs->npc = npc;
- /* 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((const 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(rwin_save))
@@ -209,7 +186,7 @@ static inline int invalid_frame_pointer(void __user *fp, int fplen)
return 0;
}
-static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
+static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp = regs->u_regs[UREG_FP];
@@ -221,12 +198,7 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
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
@@ -239,8 +211,8 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
return (void __user *) sp;
}
-static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
- int signo, sigset_t *oldset)
+static int setup_frame(struct ksignal *ksig, struct pt_regs *regs,
+ sigset_t *oldset)
{
struct signal_frame __user *sf;
int sigframe_size, err, wsaved;
@@ -258,10 +230,12 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct signal_frame __user *)
- get_sigframe(&ka->sa, regs, sigframe_size);
+ get_sigframe(ksig, regs, sigframe_size);
- if (invalid_frame_pointer(sf, sigframe_size))
- goto sigill_and_return;
+ if (invalid_frame_pointer(sf, sigframe_size)) {
+ do_exit(SIGILL);
+ return -EINVAL;
+ }
tail = sf + 1;
@@ -300,21 +274,21 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
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->pc = (unsigned long) ka->sa.sa_handler;
+ regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->npc = (regs->pc + 4);
/* 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 {
regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
@@ -324,24 +298,16 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
/* t 0x10 */
err |= __put_user(0x91d02010, &sf->insns[1]);
if (err)
- goto sigsegv;
+ return err;
/* Flush instruction space. */
flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
}
return 0;
-
-sigill_and_return:
- do_exit(SIGILL);
- return -EINVAL;
-
-sigsegv:
- force_sigsegv(signo, current);
- return -EFAULT;
}
-static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
- int signo, sigset_t *oldset, siginfo_t *info)
+static int setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs,
+ sigset_t *oldset)
{
struct rt_signal_frame __user *sf;
int sigframe_size, wsaved;
@@ -357,9 +323,11 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *)
- get_sigframe(&ka->sa, regs, sigframe_size);
- if (invalid_frame_pointer(sf, sigframe_size))
- goto sigill;
+ get_sigframe(ksig, regs, sigframe_size);
+ if (invalid_frame_pointer(sf, sigframe_size)) {
+ do_exit(SIGILL);
+ return -EINVAL;
+ }
tail = sf + 1;
err = __put_user(regs->pc, &sf->regs.pc);
@@ -391,9 +359,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t));
/* 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 |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
if (!wsaved) {
err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
@@ -405,21 +371,21 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
- err |= copy_siginfo_to_user(&sf->info, info);
+ err |= copy_siginfo_to_user(&sf->info, &ksig->info);
if (err)
- goto sigsegv;
+ return err;
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->regs;
- regs->pc = (unsigned long) ka->sa.sa_handler;
+ regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->npc = (regs->pc + 4);
- 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 {
regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
@@ -429,38 +395,25 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
/* t 0x10 */
err |= __put_user(0x91d02010, &sf->insns[1]);
if (err)
- goto sigsegv;
+ return err;
/* Flush instruction space. */
flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
}
return 0;
-
-sigill:
- do_exit(SIGILL);
- return -EINVAL;
-
-sigsegv:
- force_sigsegv(signo, current);
- return -EFAULT;
}
static inline void
-handle_signal(unsigned long signr, struct k_sigaction *ka,
- siginfo_t *info, struct pt_regs *regs)
+handle_signal(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_frame(ka, regs, signr, oldset, info);
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err = setup_rt_frame(ksig, regs, oldset);
else
- err = setup_frame(ka, regs, signr, oldset);
-
- if (err)
- return;
-
- signal_delivered(signr, info, ka, regs, 0);
+ err = setup_frame(ksig, regs, oldset);
+ signal_setup_done(err, ksig, 0);
}
static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
@@ -490,10 +443,9 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
*/
static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
{
- struct k_sigaction ka;
+ struct ksignal ksig;
int restart_syscall;
- siginfo_t info;
- int signr;
+ bool has_handler;
/* It's a lot of work and synchronization to add a new ptrace
* register for GDB to save and restore in order to get
@@ -516,7 +468,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
if (pt_regs_is_syscall(regs) && (regs->psr & PSR_C))
regs->u_regs[UREG_G6] = orig_i0;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ has_handler = get_signal(&ksig);
/* If the debugger messes with the program counter, it clears
* the software "in syscall" bit, directing us to not perform
@@ -528,35 +480,30 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
orig_i0 = regs->u_regs[UREG_G6];
}
-
- if (signr > 0) {
+ if (has_handler) {
if (restart_syscall)
- syscall_restart(orig_i0, regs, &ka.sa);
- handle_signal(signr, &ka, &info, 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->pc -= 4;
- regs->npc -= 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->pc -= 4;
- regs->npc -= 4;
- pt_regs_clear_syscall(regs);
+ syscall_restart(orig_i0, regs, &ksig.ka.sa);
+ handle_signal(&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->pc -= 4;
+ regs->npc -= 4;
+ pt_regs_clear_syscall(regs);
+ case ERESTART_RESTARTBLOCK:
+ regs->u_regs[UREG_G1] = __NR_restart_syscall;
+ regs->pc -= 4;
+ regs->npc -= 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();
}
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0,