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arm64: asm-bug: Renumber macro local labels to avoid clashes

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Currently ASM_BUG() and its constituent macros define local
assembler labels 0, 1 and 2 internally, which carries a high risk
of clash with callers' labels and consequent mis-assembly.

This patch gives the labels a big random offset to minimise the
chance of such errors.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Dave Martin 2017-10-24 18:40:36 +01:00 committed by Will Deacon
parent 6436beeee5
commit fa3eb71d96
1 changed files with 4 additions and 4 deletions
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8
arch/arm64/include/asm/asm-bug.h
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@ -22,10 +22,10 @@
#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line)
#define __BUGVERBOSE_LOCATION(file, line) \
.pushsection .rodata.str,"aMS",@progbits,1; \
2: .string file; \
14472: .string file; \
.popsection; \
\
.long 2b - 0b; \
.long 14472b - 14470b; \
.short line;
#else
#define _BUGVERBOSE_LOCATION(file, line)
@ -36,11 +36,11 @@
#define __BUG_ENTRY(flags) \
.pushsection __bug_table,"aw"; \
.align 2; \
0: .long 1f - 0b; \
14470: .long 14471f - 14470b; \
_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
.short flags; \
.popsection; \
1:
14471:
#else
#define __BUG_ENTRY(flags)
#endif