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 e4dc894b61776733629b24507031dd46f5ba5efc upstream.
Use the more generic functions get_signal() signal_setup_done() for signal delivery.
Signed-off-by: Richard Weinberger richard@nod.at Acked-by: Helge Deller deller@gmx.de [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/parisc/kernel/signal.c | 58 +++++++++++++++---------------------- 1 file changed, 24 insertions(+), 34 deletions(-)
--- a/arch/parisc/kernel/signal.c +++ b/arch/parisc/kernel/signal.c @@ -227,8 +227,8 @@ setup_sigcontext(struct sigcontext __use }
static long -setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs, int in_syscall) +setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs, + int in_syscall) { struct rt_sigframe __user *frame; unsigned long rp, usp; @@ -241,10 +241,10 @@ setup_rt_frame(int sig, struct k_sigacti usp = (regs->gr[30] & ~(0x01UL)); /*FIXME: frame_size parameter is unused, remove it. */ - frame = get_sigframe(ka, usp, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, usp, sizeof(*frame));
DBG(1,"SETUP_RT_FRAME: START\n"); - DBG(1,"setup_rt_frame: frame %p info %p\n", frame, info); + DBG(1,"setup_rt_frame: frame %p info %p\n", frame, ksig->info);
#ifdef CONFIG_64BIT @@ -253,7 +253,7 @@ setup_rt_frame(int sig, struct k_sigacti if (is_compat_task()) { DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info); - err |= copy_siginfo_to_user32(&compat_frame->info, info); + err |= copy_siginfo_to_user32(&compat_frame->info, &ksig->info); err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]); DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc); DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext); @@ -265,7 +265,7 @@ setup_rt_frame(int sig, struct k_sigacti #endif { DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info); - err |= copy_siginfo_to_user(&frame->info, info); + err |= copy_siginfo_to_user(&frame->info, &ksig->info); err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]); DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc); DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext); @@ -275,7 +275,7 @@ setup_rt_frame(int sig, struct k_sigacti } if (err) - goto give_sigsegv; + return -EFAULT;
/* Set up to return from userspace. If provided, use a stub already in userspace. The first words of tramp are used to @@ -312,9 +312,9 @@ setup_rt_frame(int sig, struct k_sigacti rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP];
if (err) - goto give_sigsegv; + return -EFAULT;
- haddr = A(ka->sa.sa_handler); + haddr = A(ksig->ka.sa.sa_handler); /* The sa_handler may be a pointer to a function descriptor */ #ifdef CONFIG_64BIT if (is_compat_task()) { @@ -326,7 +326,7 @@ setup_rt_frame(int sig, struct k_sigacti err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
if (err) - goto give_sigsegv; + return -EFAULT;
haddr = fdesc.addr; regs->gr[19] = fdesc.gp; @@ -339,7 +339,7 @@ setup_rt_frame(int sig, struct k_sigacti err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc)); if (err) - goto give_sigsegv; + return -EFAULT; haddr = fdesc.addr; regs->gr[19] = fdesc.gp; @@ -386,7 +386,7 @@ setup_rt_frame(int sig, struct k_sigacti }
regs->gr[2] = rp; /* userland return pointer */ - regs->gr[26] = sig; /* signal number */ + regs->gr[26] = ksig->sig; /* signal number */ #ifdef CONFIG_64BIT if (is_compat_task()) { @@ -410,11 +410,6 @@ setup_rt_frame(int sig, struct k_sigacti current->comm, current->pid, frame, regs->gr[30], regs->iaoq[0], regs->iaoq[1], rp);
- return 1; - -give_sigsegv: - DBG(1,"setup_rt_frame: sending SIGSEGV\n"); - force_sigsegv(sig, current); return 0; }
@@ -423,20 +418,19 @@ give_sigsegv: */
static void -handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, - struct pt_regs *regs, int in_syscall) +handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall) { + int ret; sigset_t *oldset = sigmask_to_save(); + DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n", - sig, ka, info, oldset, regs); + ksig->sig, ksig->ka, ksig->info, oldset, regs); /* Set up the stack frame */ - if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall)) - return; + ret = setup_rt_frame(ksig, oldset, regs, in_syscall);
- signal_delivered(sig, info, ka, regs, - test_thread_flag(TIF_SINGLESTEP) || - test_thread_flag(TIF_BLOCKSTEP)); + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP) || + test_thread_flag(TIF_BLOCKSTEP));
DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n", regs->gr[28]); @@ -584,22 +578,18 @@ insert_restart_trampoline(struct pt_regs asmlinkage void do_signal(struct pt_regs *regs, long in_syscall) { - siginfo_t info; - struct k_sigaction ka; - int signr; + struct ksignal ksig;
DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n", regs, regs->sr[7], in_syscall);
- signr = get_signal_to_deliver(&info, &ka, regs, NULL); - DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); - - if (signr > 0) { + if (get_signal(&ksig)) { + DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); /* Restart a system call if necessary. */ if (in_syscall) - syscall_restart(regs, &ka); + syscall_restart(regs, &ksig.ka);
- handle_signal(signr, &info, &ka, regs, in_syscall); + handle_signal(&ksig, regs, in_syscall); return; }