diff options
| author | hpa <hpa> | 2005-01-18 13:13:50 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2005-01-18 13:13:50 +0000 |
| commit | 15088eec8155b23f6768a6412229300b56f8bffb (patch) | |
| tree | 80987103489d9dab3e7ee808fb92d7945cc7ec0e /ldlinux.asm | |
| parent | ed930458b2e84f3976f41739bfa3cbf1b9d1e448 (diff) | |
| download | syslinux-15088eec8155b23f6768a6412229300b56f8bffb.tar.gz | |
Fix calculation of I/O block size in SYSLINUXsyslinux-3.08-pre2
Diffstat (limited to 'ldlinux.asm')
| -rw-r--r-- | ldlinux.asm | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/ldlinux.asm b/ldlinux.asm index 77e3e982..baa7cca3 100644 --- a/ldlinux.asm +++ b/ldlinux.asm @@ -1208,6 +1208,7 @@ getfssec_edx: push eax .getfragment: xor ebp,ebp ; Fragment sector count + push edx ; Starting sector pointer .getseccnt: inc bp dec cx @@ -1215,19 +1216,20 @@ getfssec_edx: xor eax,eax mov ax,es shl ax,4 - add ax,bx ; Now DI = how far into 64K block we are + add ax,bx ; Now AX = how far into 64K block we are not ax ; Bytes left in 64K block inc eax shr eax,SECTOR_SHIFT ; Sectors left in 64K block cmp bp,ax jnb .do_read ; Unless there is at least 1 more sector room... - lea eax,[edx+1] ; Linearly next sector + mov eax,edx ; Current sector + inc edx ; Predict it's the linearly next sector call nextsector jc .do_read - cmp edx,eax + cmp edx,eax ; Did it match? jz .getseccnt .do_read: - mov eax,edx + pop eax ; Starting sector pointer call getlinsecsr lea eax,[eax+ebp-1] ; This is the last sector actually read shl bp,9 |