overhaul cancellation to fix resource leaks and dangerous behavior with signals

[musl] / arch / x86_64 / pthread_arch.h

diff --git a/arch/x86_64/pthread_arch.h b/arch/x86_64/pthread_arch.h
index 40d2679..af7ae86 100644 (file)
--- a/arch/x86_64/pthread_arch.h
+++ b/arch/x86_64/pthread_arch.h
@@ -4,3 +4,6 @@ static inline struct pthread *__pthread_self()
        __asm__ ("movq %%fs:0,%0" : "=r" (self) );
        return self;
 }
+
+#define PC_AT_SYS(c) \
+       (*(uint16_t *)(((ucontext_t *)(c))->uc_mcontext.__gregs[16])==0x050f)