⬢ DragonFlyBSD Kernel Audit
DF-5596 / probe_gdcl.s
← back to finding ↓ download raw 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
/*
 * DF-5596 fix-validation probe: consume GD_CURRENTLDT exactly the way
 * sys/platform/pc64/x86_64/global.s:66-67 does (`.globl gd_currentldt`
 * + `.set gd_currentldt,globaldata + GD_CURRENTLDT`), but including the
 * assym file under test. Built twice:
 *   1) against the UNPATCHED generated assym.s  -> expect: no definition,
 *      symbol silently missing (the bug, build still succeeds)
 *   2) against the PATCHED regenerated assym.s  -> expect: absolute symbol
 *      present with the correct offsetof value
 */
#include <machine/asmacros.h>
#include "assym_under_test.s"

	.data
	.set	globaldata,0
	.globl	gd_currentldt_probe
	.set	gd_currentldt_probe,globaldata + GD_CURRENTLDT