diff options
| author | hpa <hpa> | 2004-02-03 05:43:51 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2004-02-03 05:43:51 +0000 |
| commit | c9f10f56c574d0dca79045a915ee28885b834af5 (patch) | |
| tree | 385d5111f5b80428bcdcd1c49a18eaeae53049ef /menu/startup.S16 | |
| parent | 06c1e5db300b4f5abf58d95584ef7e54345de404 (diff) | |
| download | syslinux-c9f10f56c574d0dca79045a915ee28885b834af5.tar.gz | |
Be a bit more paranoid about entry conditions.
Diffstat (limited to 'menu/startup.S16')
| -rw-r--r-- | menu/startup.S16 | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/menu/startup.S16 b/menu/startup.S16 index df821093..6ca7ced0 100644 --- a/menu/startup.S16 +++ b/menu/startup.S16 @@ -2,14 +2,22 @@ .globl _start _start: + /* Make sure stack pointer is normalized */ + movzwl %sp,%esp + + /* Zero .bss */ movw $__bss_start,%di xorl %eax,%eax - movw $_end,%cx + movw $(_end+3),%cx subw %di,%cx shrw $2,%cx + cld rep ; stosl + /* Invoke main() */ calll main + + /* Terminate program (with error code in %al) */ movb $0x4c,%ah int $0x21 hlt |