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Hexagon: Signal and return path fixes

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This fixes the return value of sigreturn and moves the work pending check
into a c routine for readability and fixes the loop for multiple pending
signals.  Based on feedback from Al Viro.

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
This commit is contained in:
Richard Kuo
2012-05-29 17:23:14 -05:00
parent 60c4ba99e0
commit a11e67c261
5 changed files with 86 additions and 90 deletions
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29
arch/hexagon/kernel/signal.c
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@@ -199,7 +199,7 @@ static void handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
/*
* Called from return-from-event code.
*/
static void do_signal(struct pt_regs *regs)
void do_signal(struct pt_regs *regs)
{
struct k_sigaction sigact;
siginfo_t info;
@@ -216,8 +216,9 @@ static void do_signal(struct pt_regs *regs)
}
/*
* If we came from a system call, handle the restart.
* No (more) signals; if we came from a system call, handle the restart.
*/
if (regs->syscall_nr >= 0) {
switch (regs->r00) {
case -ERESTARTNOHAND:
@@ -240,17 +241,6 @@ no_restart:
restore_saved_sigmask();
}
void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
{
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
}
/*
* Architecture-specific wrappers for signal-related system calls
*/
@@ -278,21 +268,12 @@ asmlinkage int sys_rt_sigreturn(void)
/* Restore the user's stack as well */
pt_psp(regs) = regs->r29;
/*
* Leave a trace in the stack frame that this was a sigreturn.
* If the system call is to replay, we've already restored the
* number in the GPR slot and it will be regenerated on the
* new system call trap entry. Note that if restore_sigcontext()
* did something other than a bulk copy of the pt_regs struct,
* we could avoid this assignment by simply not overwriting
* regs->syscall_nr.
*/
regs->syscall_nr = __NR_rt_sigreturn;
regs->syscall_nr = -1;
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return 0;
return regs->r00;
badframe:
force_sig(SIGSEGV, current);