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authorRich Felker <dalias@aerifal.cx>2015-11-02 12:39:28 -0500
committerRich Felker <dalias@aerifal.cx>2015-11-02 12:41:49 -0500
commitcb1bf2f321b45a06447133b3db00621b7300c456 (patch)
tree50518595b1f221270ec0a209b5252c85d4ba140c /arch/x86_64/pthread_arch.h
parentfead7e3fc04729b4cc8a5feec4a172b389395212 (diff)
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properly access mcontext_t program counter in cancellation handler
using the actual mcontext_t definition rather than an overlaid pointer
array both improves correctness/readability and eliminates some ugly
hacks for archs with 64-bit registers bit 32-bit program counter.

also fix UB due to comparison of pointers not in a common array
object.
Diffstat (limited to 'arch/x86_64/pthread_arch.h')
-rw-r--r--arch/x86_64/pthread_arch.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86_64/pthread_arch.h b/arch/x86_64/pthread_arch.h
index 29e4590c..c61509cf 100644
--- a/arch/x86_64/pthread_arch.h
+++ b/arch/x86_64/pthread_arch.h
@@ -7,4 +7,4 @@ static inline struct pthread *__pthread_self()
 
 #define TP_ADJ(p) (p)
 
-#define CANCEL_REG_IP 16
+#define MC_PC gregs[REG_RIP]