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rt: Add {get,record}_sp_limit on Win64

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Uses ArbitraryUserPointer area at gs:0x28.
This commit is contained in:
klutzy 2013-08-11 17:56:37 +09:00
parent 5118ef6ff0
commit a35bfa2e9b
1 changed files with 8 additions and 0 deletions
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8
src/rt/arch/x86_64/sp.h
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@ -43,6 +43,10 @@ extern "C" CDECL ALWAYS_INLINE uintptr_t get_sp_limit() {
asm volatile (
"movq %%fs:24, %0"
: "=r"(limit));
#elif defined(_WIN64)
asm volatile (
"movq %%gs:0x28, %0"
: "=r"(limit));
#endif
return limit;
@ -65,6 +69,10 @@ extern "C" CDECL ALWAYS_INLINE void record_sp_limit(void *limit) {
asm volatile (
"movq %0, %%fs:24"
:: "r"(limit));
#elif defined(_WIN64)
asm volatile (
"movq %0, %%gs:0x28"
:: "r"(limit));
#endif
}