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| author | H. Peter Anvin <hpa@zytor.com> | 2007-09-21 16:22:58 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-09-21 16:22:58 -0700 |
| commit | 426d986dbc77abf2247b08c44c18bf9a478c2e8e (patch) | |
| tree | 82b31e75e360864fe1aed2b0d1852701d4386a91 /comboot.inc | |
| parent | c691269f0bc370016362d50c5e25e4fd7b4eecdd (diff) | |
| download | syslinux-426d986dbc77abf2247b08c44c18bf9a478c2e8e.tar.gz | |
comboot: fix memory overwrite bug
Fix memory overwrite bug, specifically, the use of BP after it might
have gotten clobbered. Since at the point of use, BP is supposed to
be == SP, we can just add "mov bp,sp".
Diffstat (limited to 'comboot.inc')
| -rw-r--r-- | comboot.inc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/comboot.inc b/comboot.inc index 3c9df5f2..ffc9425f 100644 --- a/comboot.inc +++ b/comboot.inc @@ -187,6 +187,7 @@ comboot_int21: cli clc call ax ; Call the invoked function comboot_resume: + mov bp,sp ; In case the function clobbers BP setc P_FLAGSL ; Propagate CF->error popad pop gs |