xzre_code: add find_string_reference

xzre_code/CMakeLists.txt

@@ -6,6 +6,7 @@ add_library(xzre_code
 	elf_parse.c
 	elf_symbol_get_addr.c
 	get_lzma_allocator.c
+	find_string_reference.c
 	is_endbr64_instruction.c
 	init_elf_entry_ctx.c
 	fake_lzma_alloc.c

xzre_code/find_string_reference.c

@@ -0,0 +1,16 @@
+/**
+ * Copyright (C) 2024 Stefano Moioli <[email protected]>
+ **/
+#include "xzre.h"
+
+u8 *find_string_reference(
+	u8 *code_start,
+	u8 *code_end,
+	const char *str
+){
+	dasm_ctx_t dctx = {0};
+	if(find_lea_instruction_with_mem_operand(code_start, code_end, &dctx, (void *)str)){
+		return dctx.instruction;
+	}
+	return NULL;
+}