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Diffstat (limited to 'arch/sh/kernel/signal_32.c')
-rw-r--r--arch/sh/kernel/signal_32.c57
1 files changed, 36 insertions, 21 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index b5afbec1db5..579cd2ca358 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -41,6 +41,16 @@ struct fdpic_func_descriptor {
};
/*
+ * The following define adds a 64 byte gap between the signal
+ * stack frame and previous contents of the stack. This allows
+ * frame unwinding in a function epilogue but only if a frame
+ * pointer is used in the function. This is necessary because
+ * current gcc compilers (<4.3) do not generate unwind info on
+ * SH for function epilogues.
+ */
+#define UNWINDGUARD 64
+
+/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
@@ -57,7 +67,8 @@ sys_sigsuspend(old_sigset_t mask,
current->state = TASK_INTERRUPTIBLE;
schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_restore_sigmask();
+
return -ERESTARTNOHAND;
}
@@ -135,11 +146,11 @@ static inline int restore_sigcontext_fpu(struct sigcontext __user *sc)
{
struct task_struct *tsk = current;
- if (!(current_cpu_data.flags & CPU_HAS_FPU))
+ if (!(boot_cpu_data.flags & CPU_HAS_FPU))
return 0;
set_used_math();
- return __copy_from_user(&tsk->thread.fpu.hard, &sc->sc_fpregs[0],
+ return __copy_from_user(&tsk->thread.xstate->hardfpu, &sc->sc_fpregs[0],
sizeof(long)*(16*2+2));
}
@@ -148,7 +159,7 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc,
{
struct task_struct *tsk = current;
- if (!(current_cpu_data.flags & CPU_HAS_FPU))
+ if (!(boot_cpu_data.flags & CPU_HAS_FPU))
return 0;
if (!used_math()) {
@@ -164,7 +175,7 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc,
clear_used_math();
unlazy_fpu(tsk, regs);
- return __copy_to_user(&sc->sc_fpregs[0], &tsk->thread.fpu.hard,
+ return __copy_to_user(&sc->sc_fpregs[0], &tsk->thread.xstate->hardfpu,
sizeof(long)*(16*2+2));
}
#endif /* CONFIG_SH_FPU */
@@ -189,7 +200,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *r0_p
#undef COPY
#ifdef CONFIG_SH_FPU
- if (current_cpu_data.flags & CPU_HAS_FPU) {
+ if (boot_cpu_data.flags & CPU_HAS_FPU) {
int owned_fp;
struct task_struct *tsk = current;
@@ -327,7 +338,7 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
sp = current->sas_ss_sp + current->sas_ss_size;
}
- return (void __user *)((sp - frame_size) & -8ul);
+ return (void __user *)((sp - (frame_size+UNWINDGUARD)) & -8ul);
}
/* These symbols are defined with the addresses in the vsyscall page.
@@ -462,6 +473,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(OR_R0_R0, &frame->retcode[6]);
err |= __put_user((__NR_rt_sigreturn), &frame->retcode[7]);
regs->pr = (unsigned long) frame->retcode;
+ flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
}
if (err)
@@ -487,8 +499,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);
- flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
-
return 0;
give_sigsegv:
@@ -518,7 +528,7 @@ handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
/* fallthrough */
case -ERESTARTNOINTR:
regs->regs[0] = save_r0;
- regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
+ regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
break;
}
}
@@ -581,7 +591,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
if (try_to_freeze())
goto no_signal;
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = &current->saved_sigmask;
else
oldset = &current->blocked;
@@ -593,12 +603,13 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
/* Whee! Actually deliver the signal. */
if (handle_signal(signr, &ka, &info, oldset,
regs, save_r0) == 0) {
- /* a signal was successfully delivered; the saved
+ /*
+ * A signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
- * clear the TIF_RESTORE_SIGMASK flag */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ * clear the TS_RESTORE_SIGMASK flag
+ */
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
tracehook_signal_handler(signr, &info, &ka, regs,
test_thread_flag(TIF_SINGLESTEP));
@@ -615,17 +626,19 @@ no_signal:
regs->regs[0] == -ERESTARTSYS ||
regs->regs[0] == -ERESTARTNOINTR) {
regs->regs[0] = save_r0;
- regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
+ regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
- regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
+ regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
regs->regs[3] = __NR_restart_syscall;
}
}
- /* if there's no signal to deliver, we just put the saved sigmask
- * back */
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ /*
+ * If there's no signal to deliver, we just put the saved sigmask
+ * back.
+ */
+ if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
}
@@ -640,5 +653,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0,
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-01 18:15:35 +0000