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inline_asm: add missing "memory" constraints

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Ciro Santilli 六四事件 法轮功
2020-06-25 09:00:08 +00:00
parent fef0b24025
commit 3eca3b8124
3 changed files with 33 additions and 6 deletions
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13
userland/arch/aarch64/inline_asm/wfe_ldxr_stxr.cpp
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@@ -12,7 +12,11 @@ std::atomic_ulong done;
int futex = 1;
void myfunc() {
__asm__ __volatile__ ("sevl;wfe;ldxr x0, [%0];wfe" : : "r" (&futex) : "x0");
__asm__ __volatile__ (
"sevl;wfe;ldxr x0, [%0];wfe"
:
: "r" (&futex) : "x0", "memory"
);
done.store(futex);
}
@@ -26,7 +30,12 @@ int main(int argc, char **argv) {
thread = std::thread(myfunc);
while (!done.load()) {
if (do_sev) {
__asm__ __volatile__ ("ldxr x0, [%0];mov x0, 1;stxr w1, x0, [%0]" : : "r" (&futex) : "x0", "x1");
__asm__ __volatile__ (
"ldxr x0, [%0];mov x0, 1;stxr w1, x0, [%0]"
:
: "r" (&futex)
: "x0", "x1", "memory"
);
}
}
thread.join();