shithub: rgbds

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ref: 75a07a90f842382d7f888def0eb0104391620099
parent: ec2d1312ef39a18e9e8fe155bf91d58c79b5878b
author: ISSOtm <[email protected]>
date: Fri Dec 2 17:39:31 EST 2022

Always initialise `section->data` to avoid an uninit read

The addition of SDCC objects required a change in the logic of
`mergeSections()` to dispatch based on `->data` instead of
`sect_HasData`, which implicitly assumes that `->data` is
always initialised (maybe NULL).
However, RGBDS sections did not do that!

--- a/src/link/object.c

+++ b/src/link/object.c

@@ -398,6 +398,8 @@

 		for (uint32_t i = 0; i < section->nbPatches; i++)

 			readPatch(file, &patches[i], fileName, section->name, i, fileNodes);

 		section->patches = patches;

+	} else {

+		section->data = NULL; // `mergeSections()` expects to be able to always read the ptr

 	}

 }