[ARM] Re-use sigframe within rt_sigframe

sigframe is now a contained subset of rt_sigframe, so we can start
to re-use code which accesses sigframe data for both rt and non-rt
signals.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 11 insertions, 13 deletions

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 9f1e1768e4a6..652bb1a33c06 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -200,9 +200,7 @@ struct sigframe {
 
 struct rt_sigframe {
         struct siginfo info;
-        struct ucontext uc;
-        unsigned long retcode[2];
-        struct aux_sigframe aux __attribute__((aligned(8)));
+        struct sigframe sig;
 };
 
 static int
@@ -308,7 +306,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 
         if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
                 goto badframe;
-        if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+        if (__copy_from_user(&set, &frame->sig.uc.uc_sigmask, sizeof(set)))
                 goto badframe;
 
         sigdelsetmask(&set, ~_BLOCKABLE);
@@ -317,10 +315,10 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &frame->aux))
+        if (restore_sigcontext(regs, &frame->sig.uc.uc_mcontext, &frame->sig.aux))
                 goto badframe;
 
-        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
+        if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
                 goto badframe;
 
         /* Send SIGTRAP if we're single-stepping */
@@ -503,21 +501,21 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 
         err |= copy_siginfo_to_user(&frame->info, info);
 
-        __put_user_error(0, &frame->uc.uc_flags, err);
-        __put_user_error(NULL, &frame->uc.uc_link, err);
+        __put_user_error(0, &frame->sig.uc.uc_flags, err);
+        __put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
         memset(&stack, 0, sizeof(stack));
         stack.ss_sp = (void __user *)current->sas_ss_sp;
         stack.ss_flags = sas_ss_flags(regs->ARM_sp);
         stack.ss_size = current->sas_ss_size;
-        err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
+        err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
 
-        err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->aux,
+        err |= setup_sigcontext(&frame->sig.uc.uc_mcontext, &frame->sig.aux,
                                 regs, set->sig[0]);
-        err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+        err |= __copy_to_user(&frame->sig.uc.uc_sigmask, set, sizeof(*set));
 
         if (err == 0)
-                err = setup_return(regs, ka, frame->retcode, frame, usig);
+                err = setup_return(regs, ka, frame->sig.retcode, frame, usig);
 
         if (err == 0) {
                 /*
@@ -526,7 +524,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
                  *   -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
                  */
                 regs->ARM_r1 = (unsigned long)&frame->info;
-                regs->ARM_r2 = (unsigned long)&frame->uc;
+                regs->ARM_r2 = (unsigned long)&frame->sig.uc;
         }
 
         return err;