From: Seongbae Park <seongbae.park@gmail.com>
Date: Thu, 28 Jun 2007 20:47:14 +0000 (+0000)
Subject: arm.c (arm_get_frame_offsets): Set offsets->locals_base to avoid negative stack size.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb14f7901e5eb93f8398b460aa544d6fcb369c36;p=thirdparty%2Fgcc.git

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

gcc/ChangeLog:

2007-06-28  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:

2007-06-28  Seongbae Park  <seongbae.park@gmail.com>

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

From-SVN: r126094
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 28989b2b174e..050623a02406 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-06-28  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.
+
 2007-06-28  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/rs6000/rs6000.c (rs6000_function_ok_for_sibcall): Ensure
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 355e433cbf0a..a74d5139332e 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -10453,6 +10453,7 @@ arm_get_frame_offsets (void)
   if (leaf && frame_size == 0)
     {
       offsets->outgoing_args = offsets->soft_frame;
+      offsets->locals_base = offsets->soft_frame;
       return offsets;
     }
 
@@ -13782,6 +13783,7 @@ thumb_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 208e276029e5..e540725a14ca 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2007-06-28  Seongbae Park  <seongbae.park@gmail.com>
+
+	* gcc.target/arm/stack-corruption.c: New test.
+
 2007-06-21  Uros Bizjak  <ubizjak@gmail.com>
  
 	PR target/32389
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" } } */