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PPC: Add Linux/PPC cache flush mechanism.

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GCC's __clear_cache() does nothing on PPC. Duh.
This commit is contained in:
Mike Pall 2011-10-24 16:18:02 +02:00
parent 8fc9bc1724
commit 3591609dad
1 changed files with 17 additions and 1 deletions
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18
src/lj_asm.c
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@ -933,6 +933,15 @@ static uint32_t ir_khash(IRIns *ir)
void sys_icache_invalidate(void *start, size_t len);
#endif
#if LJ_TARGET_LINUX && LJ_TARGET_PPC
#include <dlfcn.h>
static void (*asm_ppc_cache_flush)(MCode *start, MCode *end);
static void asm_dummy_cache_flush(MCode *start, MCode *end)
{
UNUSED(start); UNUSED(end);
}
#endif
/* Flush instruction cache. */
static void asm_cache_flush(MCode *start, MCode *end)
{
@ -941,7 +950,14 @@ static void asm_cache_flush(MCode *start, MCode *end)
UNUSED(start); UNUSED(end);
#elif LJ_TARGET_OSX
sys_icache_invalidate(start, end-start);
#elif defined(__GNUC__)
#elif LJ_TARGET_LINUX && LJ_TARGET_PPC
if (!asm_ppc_cache_flush) {
void *vdso = dlopen("linux-vdso32.so.1", RTLD_LAZY);
if (!vdso || !(asm_ppc_cache_flush = dlsym(vdso, "__kernel_sync_dicache")))
asm_ppc_cache_flush = asm_dummy_cache_flush;
}
asm_ppc_cache_flush(start, end);
#elif defined(__GNUC__) && !LJ_TARGET_PPC
__clear_cache(start, end);
#else
#error "Missing builtin to flush instruction cache"