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[ARC] Clear the instruction cache using syscalls.

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Clear the instruction cache from `beg' to `end'.  This makes an inline
system call to SYS_cacheflush.

gcc/
2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/linux.h (CLEAR_INSN_CACHE): Define.

From-SVN: r259764
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Claudiu Zissulescu 2018-04-30 15:16:24 +02:00 committed by Claudiu Zissulescu
parent e0be3321b9
commit 6fe3b9fdd5
2 changed files with 18 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2018-04-30 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/linux.h (CLEAR_INSN_CACHE): Define.
2018-04-30 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc-protos.h (prepare_extend_operands): Remove.

14
gcc/config/arc/linux.h
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@ -109,3 +109,17 @@ along with GCC; see the file COPYING3. If not see
/* Build attribute: procedure call standard. */
#undef ATTRIBUTE_PCS
#define ATTRIBUTE_PCS 3
/* Clear the instruction cache from `beg' to `end'. This makes an
inline system call to SYS_cacheflush. */
#undef CLEAR_INSN_CACHE
#define CLEAR_INSN_CACHE(beg, end) \
{ \
register unsigned long _beg __asm ("r0") = (unsigned long) (beg); \
register unsigned long _end __asm ("r1") = (unsigned long) (end); \
register unsigned long _xtr __asm ("r2") = 0; \
register unsigned long _scno __asm ("r8") = 244; \
__asm __volatile ("trap_s 0 ; sys_cache_sync" \
: "=r" (_beg) \
: "0" (_beg), "r" (_end), "r" (_xtr), "r" (_scno)); \
}