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Subject[PATCH 3.16 122/202] parisc: Use get_signal() signal_setup_done()
3.16.66-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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;
}

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