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authorBen Dooks <ben.dooks@codethink.co.uk>2013-07-25 15:47:40 +0100
committerVictor Kamensky <victor.kamensky@linaro.org>2014-03-13 14:48:38 -0700
commit124fd249b01ee8234be028ba0fefac8473cd5036 (patch)
treeb559c221ca411a5e9a448a00d2fb777009bec686
parent56cbe5efe6f28a7efb459620281717fd7c109e05 (diff)
downloadlinux-linaro-stable-124fd249b01ee8234be028ba0fefac8473cd5036.tar.gz
ARM: kdgb: use <asm/opcodes.h> for data to be assembled as intruction
The arch_kgdb_breakpoint() function uses an inline assembly directive to assemble a specific instruction using .word. This means the linker will not treat is as an instruction, and therefore incorrectly swap the endian-ness if running BE8. As noted, this code means that kgdb is really only usable on arm32 kernels, and should be made dependant on not being a thumb2 kernel until fixed. However this is not something to be added to this patch. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Dave Martin <Dave.Martin@arm.com> (cherry picked from commit 5a8b93fc9457be90adfa10d3df6497393c5e2dc2) Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
-rw-r--r--arch/arm/include/asm/kgdb.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kgdb.h b/arch/arm/include/asm/kgdb.h
index 48066ce9ea34..0a9d5dd93294 100644
--- a/arch/arm/include/asm/kgdb.h
+++ b/arch/arm/include/asm/kgdb.h
@@ -11,6 +11,7 @@
#define __ARM_KGDB_H__
#include <linux/ptrace.h>
+#include <asm/opcodes.h>
/*
* GDB assumes that we're a user process being debugged, so
@@ -41,7 +42,7 @@
static inline void arch_kgdb_breakpoint(void)
{
- asm(".word 0xe7ffdeff");
+ asm(__inst_arm(0xe7ffdeff));
}
extern void kgdb_handle_bus_error(void);