diff options
| author | hpa <hpa> | 2005-04-03 00:00:36 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2005-04-03 00:00:36 +0000 |
| commit | ee86fb27a785d21bcd77bce6e57ec757268fdfc3 (patch) | |
| tree | ad3a761d133bc16ea6a2fd0226d51b1ab40f987f /extlinux.asm | |
| parent | 5506bad79a1cc566cd9f0137a083fe5dc266feb7 (diff) | |
| download | syslinux-ee86fb27a785d21bcd77bce6e57ec757268fdfc3.tar.gz | |
extlinux: fix multiple directory-parsing bugs.syslinux-3.08-pre6
Diffstat (limited to 'extlinux.asm')
| -rw-r--r-- | extlinux.asm | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/extlinux.asm b/extlinux.asm index 4de79922..999d4021 100644 --- a/extlinux.asm +++ b/extlinux.asm @@ -853,7 +853,7 @@ getonesec_ext: mov bp,1 getlinsec_ext: - cmp eax,[ClustSize] + cmp eax,[SecPerClust] jae getlinsec ; Nothing fancy ; If we get here, at least part of what we want is in the @@ -976,6 +976,11 @@ open_inode: inc eax ; s_first_data_block+1 mov cl,[ClustShift] shl eax,cl + push edx + shr edx,SECTOR_SHIFT + add eax,edx + pop edx + and dx,SECTOR_SIZE-1 call getcachesector ; Get the group descriptor add si,dx mov esi,[gs:si+bg_inode_table] ; Get inode table block # @@ -1062,6 +1067,7 @@ searchdir: call getfssec pop bx pushf ; Save EOF flag + push si ; Save filesystem pointer .getent: cmp dword [bx+d_inode],0 je .endblock @@ -1078,6 +1084,7 @@ searchdir: jmp .getent .endblock: + pop si popf jnc .readdir ; There is more .failure: @@ -1093,17 +1100,19 @@ searchdir: ; It's a match, but it's a directory. ; Repeat operation. + pop bx ; Adjust stack (di) + pop si call close - pop si ; Adjust stack (di) - pop si ; Adjust stack (flags) + pop bx ; Adjust stack (flags) inc di ; Skip slash jmp .searchloop .finish: ; We found it; now we need to open the file + pop bx ; Adjust stack (di) + pop si call close ; Close directory - pop si ; Adjust stack (di) - pop si ; Adjust stack (flags) + pop bx ; Adjust stack (flags) call open_inode .done: pop di @@ -1331,6 +1340,12 @@ getfssec: push eax push edx push edi + + movzx ecx,cx + cmp ecx,[si] ; Number of sectors left + jbe .lenok + mov cx,[si] +.lenok: .getfragment: mov eax,[si+file_sector] ; Current start index mov edi,eax @@ -1369,9 +1384,9 @@ getfssec: pop bp add [si+file_sector],ebp ; Next sector index sub [si],ebp ; Sectors consumed - jz .done jcxz .done - jmp .getfragment + jnz .getfragment + ; Fall through .done: cmp dword [si],1 ; Did we run out of file? ; CF set if [SI] < 1, i.e. == 0 |