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Diffstat (limited to 'arch/sh/kernel/signal_32.c')
-rw-r--r--arch/sh/kernel/signal_32.c36
1 files changed, 25 insertions, 11 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index f311551d9a05..4bbbde895a53 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -33,6 +33,11 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+struct fdpic_func_descriptor {
+ unsigned long text;
+ unsigned long GOT;
+};
+
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
@@ -368,6 +373,7 @@ static int setup_frame(int sig, struct k_sigaction *ka,
err |= __put_user(OR_R0_R0, &frame->retcode[6]);
err |= __put_user((__NR_sigreturn), &frame->retcode[7]);
regs->pr = (unsigned long) frame->retcode;
+ flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
}
if (err)
@@ -378,18 +384,21 @@ static int setup_frame(int sig, struct k_sigaction *ka,
regs->regs[4] = signal; /* Arg for signal handler */
regs->regs[5] = 0;
regs->regs[6] = (unsigned long) &frame->sc;
- regs->pc = (unsigned long) ka->sa.sa_handler;
+
+ if (current->personality & FDPIC_FUNCPTRS) {
+ struct fdpic_func_descriptor __user *funcptr =
+ (struct fdpic_func_descriptor __user *)ka->sa.sa_handler;
+
+ __get_user(regs->pc, &funcptr->text);
+ __get_user(regs->regs[12], &funcptr->GOT);
+ } else
+ regs->pc = (unsigned long)ka->sa.sa_handler;
set_fs(USER_DS);
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_cache_sigtramp(regs->pr);
-
- if ((-regs->pr & (L1_CACHE_BYTES-1)) < sizeof(frame->retcode))
- flush_cache_sigtramp(regs->pr + L1_CACHE_BYTES);
-
return 0;
give_sigsegv:
@@ -458,17 +467,22 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->regs[4] = signal; /* Arg for signal handler */
regs->regs[5] = (unsigned long) &frame->info;
regs->regs[6] = (unsigned long) &frame->uc;
- regs->pc = (unsigned long) ka->sa.sa_handler;
+
+ if (current->personality & FDPIC_FUNCPTRS) {
+ struct fdpic_func_descriptor __user *funcptr =
+ (struct fdpic_func_descriptor __user *)ka->sa.sa_handler;
+
+ __get_user(regs->pc, &funcptr->text);
+ __get_user(regs->regs[12], &funcptr->GOT);
+ } else
+ regs->pc = (unsigned long)ka->sa.sa_handler;
set_fs(USER_DS);
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_cache_sigtramp(regs->pr);
-
- if ((-regs->pr & (L1_CACHE_BYTES-1)) < sizeof(frame->retcode))
- flush_cache_sigtramp(regs->pr + L1_CACHE_BYTES);
+ flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
return 0;