3.16.66-rc1 review patch. If anyone has any objections, please let me know.
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From: Richard Weinberger richard@nod.at
commit 5bdb7611eb7987102f3c0fef1220dd64b6fbd9fd upstream.
Use the more generic functions get_signal() signal_setup_done() for signal delivery.
Signed-off-by: Richard Weinberger richard@nod.at [bwh: Backported to 3.16 as dependency of commit 35634ffa1751 "signal: Always notice exiting tasks"] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- arch/xtensa/kernel/signal.c | 43 ++++++++++++++----------------------- 1 file changed, 16 insertions(+), 27 deletions(-)
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c index 98b67d5f1514..4612321c73cc 100644 --- a/arch/xtensa/kernel/signal.c +++ b/arch/xtensa/kernel/signal.c @@ -331,17 +331,17 @@ gen_return_code(unsigned char *codemem) }
-static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +static int setup_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { struct rt_sigframe *frame; - int err = 0; + int err = 0, sig = ksig->sig; int signal; unsigned long sp, ra, tp;
sp = regs->areg[1];
- if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) { + if ((ksig->ka.sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) { sp = current->sas_ss_sp + current->sas_ss_size; }
@@ -351,7 +351,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, panic ("Double exception sys_sigreturn\n");
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) { - goto give_sigsegv; + return -EFAULT; }
signal = current_thread_info()->exec_domain @@ -360,8 +360,8 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, ? current_thread_info()->exec_domain->signal_invmap[sig] : sig;
- if (ka->sa.sa_flags & SA_SIGINFO) { - err |= copy_siginfo_to_user(&frame->info, info); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) { + err |= copy_siginfo_to_user(&frame->info, &ksig->info); }
/* Create the user context. */ @@ -372,8 +372,8 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= setup_sigcontext(frame, regs); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
- if (ka->sa.sa_flags & SA_RESTORER) { - ra = (unsigned long)ka->sa.sa_restorer; + if (ksig->ka.sa.sa_flags & SA_RESTORER) { + ra = (unsigned long)ksig->ka.sa.sa_restorer; } else {
/* Create sys_rt_sigreturn syscall in stack frame */ @@ -381,7 +381,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, err |= gen_return_code(frame->retcode);
if (err) { - goto give_sigsegv; + return -EFAULT; } ra = (unsigned long) frame->retcode; } @@ -393,7 +393,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up registers for signal handler; preserve the threadptr */ tp = regs->threadptr; - start_thread(regs, (unsigned long) ka->sa.sa_handler, + start_thread(regs, (unsigned long) ksig->ka.sa.sa_handler, (unsigned long) frame);
/* Set up a stack frame for a call4 @@ -416,10 +416,6 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, #endif
return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return -EFAULT; }
/* @@ -433,15 +429,11 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info, */ static void do_signal(struct pt_regs *regs) { - siginfo_t info; - int signr; - struct k_sigaction ka; + struct ksignal ksig;
task_pt_regs(current)->icountlevel = 0;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL); - - if (signr > 0) { + if (get_signal(&ksig)) { int ret;
/* Are we from a system call? */ @@ -457,7 +449,7 @@ static void do_signal(struct pt_regs *regs) break;
case -ERESTARTSYS: - if (!(ka.sa.sa_flags & SA_RESTART)) { + if (!(ksig.ka.sa.sa_flags & SA_RESTART)) { regs->areg[2] = -EINTR; break; } @@ -476,11 +468,8 @@ static void do_signal(struct pt_regs *regs)
/* Whee! Actually deliver the signal. */ /* Set up the stack frame */ - ret = setup_frame(signr, &ka, &info, sigmask_to_save(), regs); - if (ret) - return; - - signal_delivered(signr, &info, &ka, regs, 0); + ret = setup_frame(&ksig, sigmask_to_save(), regs); + signal_setup_done(ret, &ksig, 0); if (current->ptrace & PT_SINGLESTEP) task_pt_regs(current)->icountlevel = 1;