Implement cmpxchg

mehfooz09 · May 26, 2018 · fa00fa7 · fa00fa7
1 parent 5b0ad80
commit fa00fa7
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/emu/gadgets-x86/misc.S b/emu/gadgets-x86/misc.S
@@ -33,3 +33,9 @@
     pop %rdi
     pop %rsi
     gret
+
+.gadget cmpxchg32_mem
+    write_prep
+    cmpxchg %tmpd, (%_addrq)
+    gret 1
+.gadget_array cmpxchg
diff --git a/emu/gen.c b/emu/gen.c
@@ -223,7 +223,7 @@ static inline void gen_op(struct gen_state *state, gadget_t *gadgets, enum arg a
 #define REPZ(op, z) strop(op, repz, z)
 #define REPNZ(op, z) strop(op, repnz, z)
 
-#define CMPXCHG(src, dst,z) UNDEFINED
+#define CMPXCHG(src, dst,z) load(src, z); op(cmpxchg, dst, z)
 #define XADD(src, dst,z) UNDEFINED
 
 #define RDTSC g(rdtsc)