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Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

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Pull arch signal handling cleanup from Richard Weinberger:
 "This patch series moves all remaining archs to the get_signal(),
  signal_setup_done() and sigsp() functions.

  Currently these archs use open coded variants of the said functions.
  Further, unused parameters get removed from get_signal_to_deliver(),
  tracehook_signal_handler() and signal_delivered().

  At the end of the day we save around 500 lines of code."

* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
  powerpc: Use sigsp()
  openrisc: Use sigsp()
  mn10300: Use sigsp()
  mips: Use sigsp()
  microblaze: Use sigsp()
  metag: Use sigsp()
  m68k: Use sigsp()
  m32r: Use sigsp()
  hexagon: Use sigsp()
  frv: Use sigsp()
  cris: Use sigsp()
  c6x: Use sigsp()
  blackfin: Use sigsp()
  avr32: Use sigsp()
  arm64: Use sigsp()
  arc: Use sigsp()
  sas_ss_flags: Remove nested ternary if
  Rip out get_signal_to_deliver()
  Clean up signal_delivered()
  tracehook_signal_handler: Remove sig, info, ka and regs
  ...
This commit is contained in:
Linus Torvalds 2014-08-09 09:58:12 -07:00
commit 63b12bdb0d
46 changed files with 789 additions and 1238 deletions
Download patch file Download diff file Expand all files Collapse all files

58
arch/parisc/kernel/signal.c
View file

@ -227,8 +227,8 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_sysc
}
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_sigaction *ka, siginfo_t *info,
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_sigaction *ka, siginfo_t *info,
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_sigaction *ka, siginfo_t *info,
#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_sigaction *ka, siginfo_t *info,
}
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_sigaction *ka, siginfo_t *info,
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_sigaction *ka, siginfo_t *info,
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_sigaction *ka, siginfo_t *info,
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_sigaction *ka, siginfo_t *info,
}
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_sigaction *ka, siginfo_t *info,
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]);
@ -544,22 +538,18 @@ insert_restart_trampoline(struct pt_regs *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;
}