Since the ILP32 ABI uses similar signal code as the LP64 ABI, it makes sense to
reuse rather
than copy the same code.
Signed-off-by: Andrew Pinski <apin...@cavium.com>
---
arch/arm64/kernel/signal.c | 170 +-------------------------------------------
1 files changed, 1 insertions(+), 169 deletions(-)
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 3fbd848..d97a0c0 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -95,176 +95,8 @@ static int restore_fpsimd_context(struct fpsimd_context
__user *ctx)
return err ? -EFAULT : 0;
}
-static int restore_sigframe(struct pt_regs *regs,
- struct rt_sigframe __user *sf)
-{
- sigset_t set;
- int i, err;
- struct aux_context __user *aux =
- (struct aux_context __user *)sf->uc.uc_mcontext.__reserved;
-
- err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
- if (err == 0)
- set_current_blocked(&set);
-
- for (i = 0; i < 31; i++)
- __get_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
- err);
- __get_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
- __get_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
- __get_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
-
- /*
- * Avoid sys_rt_sigreturn() restarting.
- */
- regs->syscallno = ~0UL;
-
- err |= !valid_user_regs(®s->user_regs);
-
- if (err == 0)
- err |= restore_fpsimd_context(&aux->fpsimd);
-
- return err;
-}
-
-asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
-
- /* Always make any pending restarted system calls return -EINTR */
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
- /*
- * Since we stacked the signal on a 128-bit boundary, then 'sp' should
- * be word aligned here.
- */
- if (regs->sp & 15)
- goto badframe;
-
- frame = (struct rt_sigframe __user *)regs->sp;
-
- if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
- goto badframe;
-
- if (restore_sigframe(regs, frame))
- goto badframe;
-
- if (restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- return regs->regs[0];
-
-badframe:
- if (show_unhandled_signals)
- pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx
sp=%08llx\n",
- current->comm, task_pid_nr(current),
__func__,
- regs->pc, regs->sp);
- force_sig(SIGSEGV, current);
- return 0;
-}
-
-static int setup_sigframe(struct rt_sigframe __user *sf,
- struct pt_regs *regs, sigset_t *set)
-{
- int i, err = 0;
- struct aux_context __user *aux =
- (struct aux_context __user *)sf->uc.uc_mcontext.__reserved;
-
- /* set up the stack frame for unwinding */
- __put_user_error(regs->regs[29], &sf->fp, err);
- __put_user_error(regs->regs[30], &sf->lr, err);
-
- for (i = 0; i < 31; i++)
- __put_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
- err);
- __put_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
- __put_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
- __put_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
-
- __put_user_error(current->thread.fault_address,
&sf->uc.uc_mcontext.fault_address, err);
-
- err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
-
- if (err == 0)
- err |= preserve_fpsimd_context(&aux->fpsimd);
-
- /* set the "end" magic */
- __put_user_error(0, &aux->end.magic, err);
- __put_user_error(0, &aux->end.size, err);
+#include "signal_template.c"
- return err;
-}
-
-static struct rt_sigframe __user *get_sigframe(struct k_sigaction *ka,
- struct pt_regs *regs)
-{
- unsigned long sp, sp_top;
- struct rt_sigframe __user *frame;
-
- sp = sp_top = regs->sp;
-
- /*
- * This is the X/Open sanctioned signal stack switching.
- */
- if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
- sp = sp_top = current->sas_ss_sp + current->sas_ss_size;
-
- sp = (sp - sizeof(struct rt_sigframe)) & ~15;
- frame = (struct rt_sigframe __user *)sp;
-
- /*
- * Check that we can actually write to the signal frame.
- */
- if (!access_ok(VERIFY_WRITE, frame, sp_top - sp))
- frame = NULL;
-
- return frame;
-}
-
-static void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
- void __user *frame, int usig)
-{
- __sigrestore_t sigtramp;
-
- regs->regs[0] = usig;
- regs->sp = (unsigned long)frame;
- regs->regs[29] = regs->sp + offsetof(struct rt_sigframe, fp);
- regs->pc = (unsigned long)ka->sa.sa_handler;
-
- if (ka->sa.sa_flags & SA_RESTORER)
- sigtramp = ka->sa.sa_restorer;
- else
- sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp);
-
- regs->regs[30] = (unsigned long)sigtramp;
-}
-
-static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- int err = 0;
-
- frame = get_sigframe(ka, regs);
- if (!frame)
- return 1;
-
- __put_user_error(0, &frame->uc.uc_flags, err);
- __put_user_error(NULL, &frame->uc.uc_link, err);
-
- err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
- err |= setup_sigframe(frame, regs, set);
- if (err == 0) {
- setup_return(regs, ka, frame, usig);
- if (ka->sa.sa_flags & SA_SIGINFO) {
- err |= copy_siginfo_to_user(&frame->info, info);
- regs->regs[1] = (unsigned long)&frame->info;
- regs->regs[2] = (unsigned long)&frame->uc;
- }
- }
-
- return err;
-}
static void setup_restart_syscall(struct pt_regs *regs)
{
--
1.7.2.5
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