From: Seongbae Park <seongbae.park@gmail.com>
Date: Tue, 19 Jun 2007 18:47:09 +0000 (+0000)
Subject: arm.c (arm_get_frame_offsets): Set offsets->locals_base to avoid negative stack size.
X-Git-Tag: releases/gcc-4.3.0~4381
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a3a531ecfec77a9b0f30e1bce0c529c543aae332;p=thirdparty%2Fgcc.git

arm.c (arm_get_frame_offsets): Set offsets->locals_base to avoid negative stack size.

gcc/ChangeLog:

2007-06-19  Seongbae Park  <seongbae.park@gmail.com>

	* config/arm/arm.c (arm_get_frame_offsets): Set
	offsets->locals_base to avoid negative stack size.
	(thumb1_expand_prologue): Assert on negative stack size.

gcc/testsuite/ChangeLog:

2007-06-19  Seongbae Park  <seongbae.park@gmail.com>

	* gcc.target/arm/stack-corruption.c: New test.

From-SVN: r125856
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7fcbe6c51af2..8308ee683c7e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-06-19  Seongbae Park  <seongbae.park@gmail.com>
+
+	* config/arm/arm.c (arm_get_frame_offsets): Set
+	offsets->locals_base to avoid negative stack size.
+	(thumb1_expand_prologue): Assert on negative stack size.
+
 2007-04-11  Sebastian Pop  <sebpop@gmail.com>
 
 	PR tree-optimization/32367
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index e316f6a4ede0..7cd2cad6bf77 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -11101,6 +11101,7 @@ arm_get_frame_offsets (void)
   if (leaf && frame_size == 0)
     {
       offsets->outgoing_args = offsets->soft_frame;
+      offsets->locals_base = offsets->soft_frame;
       return offsets;
     }
 
@@ -14662,6 +14663,7 @@ thumb1_expand_epilogue (void)
       amount = offsets->locals_base - offsets->saved_regs;
     }
 
+  gcc_assert (amount >= 0);
   if (amount)
     {
       if (amount < 512)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dd2a1a40e2b1..8afda7faf41b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2007-06-19  Seongbae Park  <seongbae.park@gmail.com>
+
+	* gcc.target/arm/stack-corruption.c: New test.
+
 2007-06-19  Richard Guenther  <rguenther@suse.de>
 
 	* g++.dg/torture/pr30252.C: New testcase.
diff --git a/gcc/testsuite/gcc.target/arm/stack-corruption.c b/gcc/testsuite/gcc.target/arm/stack-corruption.c
new file mode 100644
index 000000000000..3a63950cc530
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/stack-corruption.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O -mthumb -fno-omit-frame-pointer" } */
+
+int main() {
+  return 0;
+}
+
+/* { dg-final { scan-assembler-not "\tadd\tr7, sp, #8\n" } } */