Fix module_are_literals_compressed to perform an unaligned read

pguyot · pguyot · commit d71f3465ffc4 · 2025-05-09T06:02:18.000+02:00
Signed-off-by: Paul Guyot &lt;pguyot@kallisys.net&gt;
diff --git a/src/libAtomVM/module.c b/src/libAtomVM/module.c
@@ -342,7 +342,7 @@ COLD_FUNC void module_destroy(Module *module)
 
 static bool module_are_literals_compressed(const uint8_t *litT)
 {
-    uint32_t required_buf_size = READ_32_ALIGNED(litT + LITT_UNCOMPRESSED_SIZE_OFFSET);
+    uint32_t required_buf_size = READ_32_UNALIGNED(litT + LITT_UNCOMPRESSED_SIZE_OFFSET);
     return (required_buf_size != 0);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -342,7 +342,7 @@ COLD_FUNC void module_destroy(Module *module)`
`342`	`342`
`343`	`343`	`static bool module_are_literals_compressed(const uint8_t *litT)`
`344`	`344`	`{`
`345`		`- uint32_t required_buf_size = READ_32_ALIGNED(litT + LITT_UNCOMPRESSED_SIZE_OFFSET);`
	`345`	`+ uint32_t required_buf_size = READ_32_UNALIGNED(litT + LITT_UNCOMPRESSED_SIZE_OFFSET);`
`346`	`346`	`return (required_buf_size != 0);`
`347`	`347`	`}`
`348`	`348`