x86_64: ensure that dtor pointer passed to app is 0 so it won't be used

leaving it uninitialized caused unpredictable crashes or worse due to calling an indeterminate function pointer.
2011-06-19 08:33:27 -04:00 · 2011-06-19 08:33:27 -04:00 · 779165e6d4
parent 596d60c565
commit 779165e6d4
1 changed files with 1 additions and 0 deletions
--- a/src/ldso/x86_64/start.s
+++ b/src/ldso/x86_64/start.s
@ -5,4 +5,5 @@ _start:
 	lea 8(%rsp),%rsi
 	lea _GLOBAL_OFFSET_TABLE_(%rip),%rdx
 	call __dynlink
+	xor %edx,%edx
 	jmp *%rax