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openSUSE:11.4
syslinux
syslinux-3.86-gfxboot.diff
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File syslinux-3.86-gfxboot.diff of Package syslinux
diff --git a/core/isolinux.asm b/core/isolinux.asm index 23429bd..54f2e19 100644 --- a/core/isolinux.asm +++ b/core/isolinux.asm @@ -1135,73 +1135,23 @@ all_read: ; (which will be at 16 only for a single-session disk!); from the PVD ; we should be able to find the rest of what we need to know. ; -get_fs_structures: - mov eax,[bi_pvd] - mov bx,trackbuf - call getonesec - - mov eax,[trackbuf+156+2] - mov [RootDir+dir_lba],eax - mov [CurrentDir+dir_lba],eax -%ifdef DEBUG_MESSAGES - mov si,dbg_rootdir_msg - call writemsg - call writehex8 - call crlf -%endif - mov eax,[trackbuf+156+10] - mov [RootDir+dir_len],eax - mov [CurrentDir+dir_len],eax - add eax,SECTOR_SIZE-1 - shr eax,SECTOR_SHIFT - mov [RootDir+dir_clust],eax - mov [CurrentDir+dir_clust],eax - - ; Look for an isolinux directory, and if found, - ; make it the current directory instead of the root - ; directory. - ; Also copy the name of the directory to CurrentDirName - mov word [CurrentDirName],ROOT_DIR_WORD ; Write '/',0 to the CurrentDirName + call iso_mount mov di,boot_dir ; Search for /boot/isolinux - mov al,02h - push di - call searchdir_iso - pop di - jnz .found_dir - mov di,isolinux_dir - mov al,02h ; Search for /isolinux - push di - call searchdir_iso - pop di - jz .no_isolinux_dir + call setcwd + jnc .found_dir + mov di,isolinux_dir ; Search for /isolinux + call setcwd .found_dir: - ; Copy current directory name to CurrentDirName - push si - push di - mov si,di - mov di,CurrentDirName - call strcpy - mov byte [di],0 ;done in case it's not word aligned - dec di - mov byte [di],'/' - pop di - pop si - mov [CurrentDir+dir_len],eax - mov eax,[si+file_left] - mov [CurrentDir+dir_clust],eax - xor eax,eax ; Free this file pointer entry - xchg eax,[si+file_sector] - mov [CurrentDir+dir_lba],eax %ifdef DEBUG_MESSAGES push si mov si,dbg_isodir_msg call writemsg pop si + mov eax,[CurrentDir+dir_lba] call writehex8 call crlf %endif -.no_isolinux_dir: ; ; Locate the configuration file @@ -1706,6 +1656,90 @@ getfssec: TRACER 'f' ret +; +; setcwd: Set current working directory. +; +; On entry: +; DI -> directory name +; On exit: +; CF = 1 -> error +; +; On error, the old working directory is kept. +; +setcwd: + mov al,02h + push di + call searchdir_iso + pop di + stc + jz .err + mov [CurrentDir+dir_len],eax + mov eax,[si+file_left] + mov [CurrentDir+dir_clust],eax + xor eax,eax + xchg eax,[si+file_sector] + mov [CurrentDir+dir_lba],eax + mov si,di + mov di,CurrentDirName + cmp si,di + jz .ok + mov cx,FILENAME_MAX + push ds + pop es +.copy: + lodsb + stosb + or al,al + loopnz .copy + mov byte [di-1],0 + jnz .err +.ok: + clc +.err: + ret + +; +; Read fs meta data and setup RootDir and CurrentDir. +; +; On exit: +; CF = 1 -> error +; +iso_mount: + mov eax,[bi_pvd] + mov bx,trackbuf + call getonesec + + mov eax,[trackbuf+156+10] + mov [RootDir+dir_len],eax + add eax,SECTOR_SIZE-1 + shr eax,SECTOR_SHIFT + mov [RootDir+dir_clust],eax + mov eax,[trackbuf+156+2] + mov [RootDir+dir_lba],eax + + push ds + pop es + mov si,RootDir + mov di,CurrentDir + mov cx,dir_t_size + rep movsb + +%ifdef DEBUG_MESSAGES + mov si,dbg_rootdir_msg + call writemsg + call writehex8 + call crlf +%endif + + mov di,CurrentDirName + call setcwd + jnc .ok + mov word [CurrentDirName],ROOT_DIR_WORD +.ok: + clc + ret + + ; ----------------------------------------------------------------------------- ; Common modules ; ----------------------------------------------------------------------------- diff --git a/core/comboot.inc b/core/comboot.inc index f8a7853..37bd0f2 100644 --- a/core/comboot.inc +++ b/core/comboot.inc @@ -970,6 +970,45 @@ comapi_shufraw: mov ecx,P_ECX jmp shuffle_and_boot_raw + +; +; INT 22h AX=0025h Set current working directory +; +%if IS_ISOLINUX +comapi_setcwd: + mov si,P_BX + mov di,TmpDirName + mov cx,FILENAME_MAX + mov ds,P_ES +.copy: + lodsb + stosb + or al,al + loopnz .copy + push cs + pop ds + stc + jnz .err + mov di,TmpDirName + call setcwd +.err: + ret +%else +comapi_setcwd equ comapi_err +%endif + + +; +; INT 22h AX=0026h Read filesystem meta data +; +%if IS_ISOLINUX +comapi_mount: +; call iso_mount + ret +%else +comapi_mount equ comapi_err +%endif + section .data %macro int21 2 @@ -1029,6 +1068,8 @@ int22_table: dw comapi_closedir ; 0022 close directory dw comapi_shufsize ; 0023 query shuffler size dw comapi_shufraw ; 0024 cleanup, shuffle and boot raw + dw comapi_setcwd ; 0025 set current working directory + dw comapi_mount ; 0026 read fs structures (aka mount) int22_count equ ($-int22_table)/2 APIKeyWait db 0 @@ -1049,8 +1090,9 @@ feature_flags_len equ ($-feature_flags) err_notdos db ': attempted DOS system call INT ',0 err_comlarge db 'COMBOOT image too large.', CR, LF, 0 - section .bss1 + section .bss2 alignb 4 DOSErrTramp resd 33 ; Error trampolines +TmpDirName resb FILENAME_MAX ConfigName resb FILENAME_MAX CurrentDirName resb FILENAME_MAX diff --git a/doc/comboot.txt b/doc/comboot.txt index eb43708..13d18f6 100644 --- a/doc/comboot.txt +++ b/doc/comboot.txt @@ -949,3 +949,20 @@ AX=0024h [3.80] Cleanup, shuffle and boot, raw version with read/write data segments, matching the respective code segment. For mode 0, B=0 and the limits will be 64K, for mode 1, B=1 and the limits will be 4 GB. + + +AX=0025h [3.84] Set current working directory + Input: AX 00025h + ES:BX null-terminated directory name string + Output: None + + Sets the current working directory. For SYSLINUX, ISOLINUX, + and PXELINUX, this will be an absolute path. + + +AX=0026h [3.84] Read file system metadata [ISOLINUX] + Input: AX 00026h + Output: None + + Reads filesystem data (e.g. after a CDROM change). + diff --git a/modules/Makefile b/modules/Makefile index 77020ea..f318364 100644 --- a/modules/Makefile +++ b/modules/Makefile @@ -19,7 +19,7 @@ include $(topdir)/MCONFIG.embedded INCLUDES = -I$(com32)/include -BINS = pxechain.com gfxboot.com poweroff.com int18.com +BINS = pxechain.com poweroff.com int18.com all: $(BINS)
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