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linux-unwind.h (aarch64_fallback_frame_state): Check for correct opcodes on BE. 

2013-11-26  Matthew Leach  <matthew.leach@arm.com>

	* config/aarch64/linux-unwind.h (aarch64_fallback_frame_state):	Check
	for correct opcodes on BE.

From-SVN: r205479
This commit is contained in:
Matthew Leach 2013-11-28 10:59:38 +00:00 committed by Richard Earnshaw
parent 506cb36189
commit cceeb9a978
2 changed files with 19 additions and 1 deletions
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5
libgcc/ChangeLog
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@ -1,3 +1,8 @@
2013-11-26 Matthew Leach <matthew.leach@arm.com>
* config/aarch64/linux-unwind.h (aarch64_fallback_frame_state): Check
for correct opcodes on BE.
2013-11-27 Uros Bizjak <ubizjak@gmail.com>
* soft-fp/op-4.h: Update from glibc.

15
libgcc/config/aarch64/linux-unwind.h
View File

@ -25,6 +25,19 @@
#include <signal.h>
#include <sys/ucontext.h>
/* Since insns are always stored LE, on a BE system the opcodes will
be loaded byte-reversed. Therefore, define two sets of opcodes,
one for LE and one for BE. */
#if __AARCH64EB__
#define MOVZ_X8_8B 0x681180d2
#define SVC_0 0x010000d4
#else
#define MOVZ_X8_8B 0xd2801168
#define SVC_0 0xd4000001
#endif
#define MD_FALLBACK_FRAME_STATE_FOR aarch64_fallback_frame_state
static _Unwind_Reason_Code
@ -55,7 +68,7 @@ aarch64_fallback_frame_state (struct _Unwind_Context *context,
0xd2801168 movz x8, #0x8b
0xd4000001 svc 0x0
*/
if (pc[0] != 0xd2801168 || pc[1] != 0xd4000001)
if (pc[0] != MOVZ_X8_8B || pc[1] != SVC_0)
{
return _URC_END_OF_STACK;
}