A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 19:51:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

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

Browse source 
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

53
arch/c6x/kernel/signal.c
View file

@ -127,17 +127,11 @@ static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
return err;
}
static inline void __user *get_sigframe(struct k_sigaction *ka,
static inline void __user *get_sigframe(struct ksignal *ksig,
struct pt_regs *regs,
unsigned long framesize)
{
unsigned long sp = regs->sp;
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(sp) == 0)
sp = current->sas_ss_sp + current->sas_ss_size;
unsigned long sp = sigsp(regs->sp, ksig);
/*
* No matter what happens, 'sp' must be dword
@ -146,21 +140,21 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
return (void __user *)((sp - framesize) & ~7);
}
static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
unsigned long __user *retcode;
int err = 0;
frame = get_sigframe(ka, regs, sizeof(*frame));
frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto segv_and_exit;
return -EFAULT;
err |= __put_user(&frame->info, &frame->pinfo);
err |= __put_user(&frame->uc, &frame->puc);
err |= copy_siginfo_to_user(&frame->info, info);
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
/* Clear all the bits of the ucontext we don't use. */
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
@ -188,7 +182,7 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
#undef COPY
if (err)
goto segv_and_exit;
return -EFAULT;
flush_icache_range((unsigned long) &frame->retcode,
(unsigned long) &frame->retcode + RETCODE_SIZE);
@ -198,10 +192,10 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
/* Change user context to branch to signal handler */
regs->sp = (unsigned long) frame - 8;
regs->b3 = (unsigned long) retcode;
regs->pc = (unsigned long) ka->sa.sa_handler;
regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
/* Give the signal number to the handler */
regs->a4 = signr;
regs->a4 = ksig->sig;
/*
* For realtime signals we must also set the second and third
@ -212,10 +206,6 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
regs->a6 = (unsigned long)&frame->uc;
return 0;
segv_and_exit:
force_sigsegv(signr, current);
return -EFAULT;
}
static inline void
@ -245,10 +235,11 @@ do_restart:
/*
* handle the actual delivery of a signal to userspace
*/
static void handle_signal(int sig,
siginfo_t *info, struct k_sigaction *ka,
struct pt_regs *regs, int syscall)
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs,
int syscall)
{
int ret;
/* Are we from a system call? */
if (syscall) {
/* If so, check system call restarting.. */
@ -259,7 +250,7 @@ static void handle_signal(int sig,
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
regs->a4 = -EINTR;
break;
}
@ -272,9 +263,8 @@ static void handle_signal(int sig,
}
/* Set up the stack frame */
if (setup_rt_frame(sig, ka, info, sigmask_to_save(), regs) < 0)
return;
signal_delivered(sig, info, ka, regs, 0);
ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
signal_setup_done(ret, ksig, 0);
}
/*
@ -282,18 +272,15 @@ static void handle_signal(int sig,
*/
static void do_signal(struct pt_regs *regs, int syscall)
{
struct k_sigaction ka;
siginfo_t info;
int signr;
struct ksignal ksig;
/* we want the common case to go fast, which is why we may in certain
* cases get here from kernel mode */
if (!user_mode(regs))
return;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
handle_signal(signr, &info, &ka, regs, syscall);
if (get_signal(&ksig)) {
handle_signal(&ksig, regs, syscall);
return;
}