Oops, the last minute reduction in the clobber list for i386

MCOUNT_OVERHEAD() in r334522 was too agressive. Only mcount exit preserves %eax and %edx.
2018-06-02 09:59:27 +00:00 · 2018-06-02 09:59:27 +00:00 · d10566cf49
commit d10566cf49
parent b274c68a20
1 changed files with 1 additions and 1 deletions
--- a/sys/i386/include/profile.h
+++ b/sys/i386/include/profile.h
@ -64,7 +64,7 @@
 	__asm __volatile("pushl %0; call __mcount; popl %%ecx"		\
 			 :						\
 			 : "i" (label)					\
-			 : "cx", "memory")
+			 : "ax", "dx", "cx", "memory")
 #define	MEXITCOUNT_OVERHEAD()						\
 	__asm __volatile("call .mexitcount; 1:"				\
 			 : :						\