Commit c443c2be authored by Andrew Ruder's avatar Andrew Ruder Committed by Peter Korsgaard
Browse files

gcc 4.8.2: arm fixes for stack corruption 



This seems to especially affect the kernel, but in an
interrupt-heavy system, this fixes a bug that can cause frequent
NULL pointer dereference crashes on ARM systems.

Signed-off-by: default avatarPeter Korsgaard <peter@korsgaard.com>
parent f5437a65

package/gcc/4.8.2/842-gcc-4.8.2-Fix-PR-target-58854.patch

0 → 100644
+32 −0
Original line number Diff line number Diff line 
From 9a228f68817f79bbd1d295b8e6fcaed25c47ee8f Mon Sep 17 00:00:00 2001

From: ramana <ramana@138bc75d-0d04-0410-961f-82ee72b054a4>

Date: Wed, 30 Oct 2013 10:54:04 +0000

Subject: [PATCH] Fix PR target/58854



2013-10-30  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>



	PR target/58854

	* config/arm/arm.c (arm_expand_epilogue_apcs_frame): Emit blockage.





git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204203 138bc75d-0d04-0410-961f-82ee72b054a4

---

 (omitted from this patch) gcc/ChangeLog        |    5 +++++

 gcc/config/arm/arm.c |    1 +

 2 files changed, 6 insertions(+), 0 deletions(-)



diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c

index 212a4bc..23dfc0e 100644

--- a/gcc/config/arm/arm.c

+++ b/gcc/config/arm/arm.c

@@ -26547,6 +26547,7 @@ arm_expand_epilogue_apcs_frame (bool really_return)

   num_regs = bit_count (saved_regs_mask);

   if ((offsets->outgoing_args != (1 + num_regs)) || cfun->calls_alloca)

     {

+      emit_insn (gen_blockage ());

       /* Unwind the stack to just below the saved registers.  */

       emit_insn (gen_addsi3 (stack_pointer_rtx,

                              hard_frame_pointer_rtx,

-- 

1.7.1