JIT: Fix incorrect JIT prologur size for CLANG/x86 build

dstogov · dstogov · commit 6d5922bed593 · 2021-12-20T23:52:46.000+03:00
Fixes oss-fuzz #42724
diff --git a/ext/opcache/jit/zend_jit_x86.dasc b/ext/opcache/jit/zend_jit_x86.dasc
@@ -3440,7 +3440,7 @@ static int zend_jit_trace_link_to_root(dasm_State **Dst, zend_jit_trace_info *t,
 #if defined(__x86_64__) || defined(_M_X64)
 		prologue_size = 17;
 #else
-		prologue_size = 12;
+		prologue_size = 13;
 #endif
 	}
 	link_addr = (const void*)((const char*)t->code_start + prologue_size);

Original file line number	Diff line number	Diff line change
`@@ -3440,7 +3440,7 @@ static int zend_jit_trace_link_to_root(dasm_State *Dst, zend_jit_trace_info t,`
`3440`	`3440`	`#if defined(__x86_64__) \|\| defined(_M_X64)`
`3441`	`3441`	`prologue_size = 17;`
`3442`	`3442`	`#else`
`3443`		`- prologue_size = 12;`
	`3443`	`+ prologue_size = 13;`
`3444`	`3444`	`#endif`
`3445`	`3445`	`}`
`3446`	`3446`	`link_addr = (const void)((const char)t->code_start + prologue_size);`