From 6606fdc0aad85cbca1bb58e1b2ffe05611aabd7a Mon Sep 17 00:00:00 2001
From: Christophe Lyon <christophe.lyon@linaro.org>
Date: Wed, 12 Aug 2020 09:22:38 +0000
Subject: [PATCH] testsuite: Fix gcc.target/arm/stack-protector-1.c for
Cortex-M
The stack-protector-1.c test fails when compiled for Cortex-M:
- for Cortex-M0/M1, str r0, [sp #-8]! is not supported
- for Cortex-M3/M4..., the assembler complains that "use of r13 is
deprecated"
This patch replaces the str instruction with
sub sp, sp, #8
str r0, [sp]
and removes the check for r13, which is unlikely to leak the canary
value.
2020-08-11 Christophe Lyon <christophe.lyon@linaro.org>
gcc/testsuite/
* gcc.target/arm/stack-protector-1.c: Adapt code to Cortex-M
restrictions.
---
gcc/testsuite/gcc.target/arm/stack-protector-1.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/testsuite/gcc.target/arm/stack-protector-1.c b/gcc/testsuite/gcc.target/arm/stack-protector-1.c
index b03ea14c4e2d..8d28b0a847c2 100644
--- a/gcc/testsuite/gcc.target/arm/stack-protector-1.c
+++ b/gcc/testsuite/gcc.target/arm/stack-protector-1.c
@@ -34,7 +34,8 @@ asm (
" .type main, %function\n"
"main:\n"
" bl get_ptr\n"
-" str r0, [sp, #-8]!\n"
+" sub sp, sp, #8\n"
+" str r0, [sp]\n"
" bl f\n"
" str r0, [sp, #4]\n"
" ldr r0, [sp]\n"
@@ -51,7 +52,6 @@ asm (
CHECK (r10)
CHECK (r11)
CHECK (r12)
- CHECK (r13)
CHECK (r14)
" ldr r1, [sp, #4]\n"
CHECK (r1)
--
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