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| author | H. Peter Anvin <hpa@zytor.com> | 2008-09-08 17:30:55 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-09-08 17:30:55 -0700 |
| commit | 6879e4565b2ed27de10e7a22bba568503012ef1a (patch) | |
| tree | 886652e829918739e2d293d2b11d16acf3579760 /mbr | |
| parent | 6d5d88b94bccafc2e8f28dff016172103f3814ed (diff) | |
| download | syslinux-6879e4565b2ed27de10e7a22bba568503012ef1a.tar.gz | |
mbr, gptmbr, isohdpfx: don't lose the carry flag
Using addw to restore the stack pointer clobbers CF. Use leaw
instead, even though this relies on the BIOS not clobbering %si.
Worst case we can add a mov %sp, %si or similar.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mbr')
| -rw-r--r-- | mbr/gptmbr.S | 2 | ||||
| -rw-r--r-- | mbr/isohdpfx.S | 2 | ||||
| -rw-r--r-- | mbr/mbr.S | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/mbr/gptmbr.S b/mbr/gptmbr.S index 77408b75..385afe74 100644 --- a/mbr/gptmbr.S +++ b/mbr/gptmbr.S @@ -257,7 +257,7 @@ read_sector_cbios: read_common: movb (%bp), %dl /* driveno */ int $0x13 - addw $16, %sp /* Drop DAPA */ + leaw 16(%si), %sp /* Drop DAPA */ popal jc disk_error addb $2, %bh /* bx += 512: point to the next buffer */ diff --git a/mbr/isohdpfx.S b/mbr/isohdpfx.S index ece37a76..9a97a5ee 100644 --- a/mbr/isohdpfx.S +++ b/mbr/isohdpfx.S @@ -182,7 +182,7 @@ read_sector_cbios: read_common: movb (driveno), %dl int $0x13 - addw $16, %sp /* Drop DAPA */ + leaw 16(%si), %sp /* Drop DAPA */ popal ret @@ -144,7 +144,7 @@ read_sector_cbios: read_common: movb (driveno), %dl int $0x13 - addw $16, %sp /* Drop DAPA */ + leaw 16(%si), %sp /* Drop DAPA */ popal ret |