Mail Archives: djgpp/1998/07/15/19:16:19
| From: | tmurez AT planete DOT net
|
| Newsgroups: | alt.lang.asm,comp.lang.asm.x86,comp.os.msdos.djgpp
|
| Subject: | Need help : Problem building a vesa lib with nasm&djgpp
|
| Date: | 15 Jul 1998 23:02:23 GMT
|
| Organization: | Planete.net, France
|
| Lines: | 266
|
| Approved: | <johnfine AT erols DOT com>
|
| Message-ID: | <6ojcdv$dg9$1@winter.news.erols.com>
|
| NNTP-Posting-Host: | 207-172-240-181.s54.as3.bsd.erols.com
|
| To: | djgpp AT delorie DOT com
|
| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
Hi,
(excuse my mistakes i m french)
I'm used to build programs with BC++ and his inline assembly. I wanted to
use DMPI so i got DJGPP and NASM. I've written the following routine. My
problems and what i noticed with fsdb (djgpp debugger) are written in the
routine.
(I'v added at the end of this message my Rhide's bug report)
*************************************************************************
vbelib.asm (nasm -f coff vbelib.asm):
[BITS 32]
[GLOBAL _VBE2Detect]
[SECTION .text]
;Function VBE2Detect();
;out : 0 if error or vesa 2 not available, 1 if vesa 2 or greater
; available
_VBE2Detect:
pushad
mov AX, 0100h ;DPMI Allocate DOS Memory Block int 31h fct 100h
mov BX, 32 ;32 paragraphs equ to 512 bytes (vesa info header)
int 31h
jnc .MemoireAllouee ;jump if memory allocated
popad ;else pop registers and return 0
xor eax, eax
ret
.MemoireAllouee:
mov [DOSMEM_RMSEG], AX ;save real mode segment
mov [DOSMEM_SELECTOR], DX ;save mem selector
mov ecx, eax ;ecx will be linear address
and ecx, 0FFFFh ;clear high 16bits
shl ecx, 4 ;seg*16
mov [DOSMEM_LINADDR], ECX ;save linear address
mov dword [ecx+VbeInfoBlock+VbeSignature], 'VBE2'
;asking for VBE 2.0 Info
push ds
pop es ;es=ds to prevent GPF
mov EDI, RMREGS ;edi=offset RMREGS
mov dword [RM_EAX], 04F00h ;VESA Fct 00h
mov dword [RM_EDI], 0 ;offset dosmem=0
mov word [RM_ES], AX ;segment returned from int31h
mov AX, 0300h ;DPMI Simulate Real ModeInterrupt
mov BX, 0010h ;real mode int 10h
xor CX, CX ;cx=0
int 31h
jnc .Interrupt31Succes ;jump if success
;else free dos mem and return 0
mov AX, 0101h ;DPMI Free DOS Memory Block
mov DX, [DOSMEM_SELECTOR]
int 31h
popad
xor EAX, EAX
ret
.Interrupt31Succes:
mov eax, [RM_EAX]
cmp dword AX, 04Fh ;Check if Vesa fct call succeed
je .InterruptVbeSucces ;jump if success
;else free dos mem and return 0
mov AX, 0101h
mov DX, [DOSMEM_SELECTOR]
int 31h
popad
xor eax, eax
ret
;using fsdb i can tell everything works fine until here.
;I think the problem is the offset, seg or linear address i
;use. It seems that the Dos memory i have allocated earlier is not filled
;with Vesa Info during int 10h. I've tried to use random values for real
;mode offset and segment and vesa returned success...I'd like to know if
;there's something more to do to access to dos memory like mapping or
;something else, if i have to copy something between stacks (param CX)
;I think the problem is that vesa writes somewhere in memory and that i
;don't look for data at the right place...MAYDAY !!
.InterruptVbeSucces:
mov ecx, [DOSMEM_LINADDR]
cmp dword [ecx+VbeInfoBlock+VbeSignature], 'ASEV'
je .VESADetecte
mov AX, 0101h
mov DX, [DOSMEM_SELECTOR]
int 31h
popad
xor eax, eax
ret
.VESADetecte:
cmp word[ecx+VbeInfoBlock+VbeVersion], 0200h
jge .VBE2
mov AX, 0101h
mov DX, [DOSMEM_SELECTOR]
int 31h
popad
xor eax, eax
ret
.VBE2:
mov AX, 0101h
mov DX, [DOSMEM_SELECTOR]
int 31h
popad
xor eax, eax
inc eax
ret
[SECTION .data]
DOSMEM_RMSEG dw 0
DOSMEM_SELECTOR dw 0
DOSMEM_LINADDR dd 0
struc VbeInfoBlock
VbeSignature resb 4 ; VBE Signature
VbeVersion resw 1 ; VBE Version
OemStringPtr resd 1 ; Pointer to OEM String
Capabilities resb 4;Capabilities of graphics cont.
VideoModePtr resd 1 ; Pointer to Video Mode List
TotalMemory resw 1 ; Number of 64kb memory blocks
; Added for VBE 2.0
OemSoftwareRev resw 1 ; VBE implementation Software
revision
OemVendorNamePtr resd 1 ; Pointer to Vendor
Name String
OemProductNamePtr resd 1 ; Pointer to Product
Name String
OemProductRevPtr resd 1 ; Pointer to Product
Revision String
Reserved resb 222 ; Reserved for VBE
implementation
; scratch area
OemData resb 256 ; Data Area for OEM
Strings
endstruc
RMREGS:
RM_EDI dd 0
RM_ESI dd 0
RM_EBP dd 0
RM_Reserved dd 0
RM_EBX dd 0
RM_EDX dd 0
RM_ECX dd 0
RM_EAX dd 0
RM_Flags dw 0
RM_ES dw 0
RM_DS dw 0
RM_FS dw 0
RM_GS dw 0
RM_IP dw 0
RM_CS dw 0
RM_SP dw 0
RM_SS dw 0
************************************************************************
This is a bug report for RHIDE Version 1.4 (Sep 30 1997 23:06:59)
I am running MS-DOS 7.10 (Windows 95)
Important environment variables:
PATH=C:\PROGRA~1\UTILIT~1\NORTON~1;C:\PROGRA~1\BUREAU~1\OFFICE\OFFICE;C:\
WINDOWS;C:\WINDOWS\COMMAND;C:\PROGRA~1\COMPRE~1\;C:\DRIVERS\4DOS\;c:\prog
ra~1\progra~1\djgpp2\bin;
DJGPP=c:\progra~1\progra~1\djgpp2\djgpp.env
LFN=y
INFOPATH=c:/progra~1/progra~1/djgpp2/info;c:/progra~1/progra~1/djgpp2/gnu
/emacs/info;c:/progra~1/progra~1/djgpp2/info;c:/progra~1/progra~1/djgpp2/
gnu/emacs/info
LOCALEDIR=
LANGUAGE=
SHELL=
COMSPEC=C:\DRIVERS\4DOS\4DOS.COM
DJSYSFLAGS=
Here is the output from a sample compilation and link for C
executing:
echo "int main(){return 0;}" | redir -eo gcc -Xlinker -v -Wa,-v -v -o
/dev/null -x c -
Reading specs from c:/progra~1/progra~1/djgpp2/lib/specs
gcc version 2.8.1
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81\cpp.exe -lang-c -v -
undef -D__GNUC__=2 -D__GNUC_MINOR__=8 -Dunix -Di386 -DGO32 -DMSDOS -
DDJGPP=2 -DDJGPP_MINOR=1 -D__unix__ -D__i386__ -D__GO32__ -D__MSDOS__ -
D__DJGPP__=2 -D__DJGPP_MINOR__=1 -D__unix -D__i386 -D__GO32 -D__MSDOS -
D__DJGPP=2 -D__DJGPP_MINOR=1 -
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccaywrjh
GNU CPP version 2.8.1 (80386, BSD syntax)
#include "..." search starts here:
#include <...> search starts here:
c:/progra~1/progra~1/djgpp2/include
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp/2.81/include
c:/progra~1/progra~1/djgpp2/include
End of search list.
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81\cc1.exe
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccaywrjh -quiet -dumpbase -.c -
version -o c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccbywrjh
GNU C version 2.8.1 (djgpp) compiled by GNU C version 2.8.1.
c:/progra~1/progra~1/djgpp2/bin/as.exe -v -o
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\cccywrjh
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccbywrjh
GNU assembler version 2.8.1 (i386-pc-msdosdjgpp)
c:/progra~1/progra~1/djgpp2/bin/ld.exe -o /dev/null
c:/progra~1/progra~1/djgpp2/lib/crt0.o -Lc:/progra~1/progra~1/djgpp2/lib
-Lc:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81 -
Lc:/progra~1/progra~1/djgpp2/bin -Lc:/progra~1/progra~1/djgpp2/lib -v
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\cccywrjh -Tdjgpp.djl -lgcc -lc -
lgcc
GNU ld version 2.8.1 (with BFD 2.8.1)
c:/progra~1/progra~1/djgpp2/bin/stubify.exe -v /dev/null
Warning: input file is not COFF or stubbed COFF
.exe: No such file or directory (ENOENT)
stubify for djgpp V2.X executables, Copyright (C) 1995 DJ Delorie
End of the sample
Here is the output from a sample compilation and link for C++
executing:
echo "int main(){return 0;}" | redir -eo gcc -Xlinker -v -Wa,-v -v -o
/dev/null -x c++ -
Reading specs from c:/progra~1/progra~1/djgpp2/lib/specs
gcc version 2.8.1
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81\cpp.exe -lang-c++ -v
-undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=8 -Dunix
-Di386 -DGO32 -DMSDOS -DDJGPP=2 -DDJGPP_MINOR=1 -D__unix__ -D__i386__ -
D__GO32__ -D__MSDOS__ -D__DJGPP__=2 -D__DJGPP_MINOR__=1 -D__unix -D__i386
-D__GO32 -D__MSDOS -D__DJGPP=2 -D__DJGPP_MINOR=1 -D__EXCEPTIONS -
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccaqdtjh
GNU CPP version 2.8.1 (80386, BSD syntax)
#include "..." search starts here:
#include <...> search starts here:
c:/progra~1/progra~1/djgpp2/lang/cxx
c:/progra~1/progra~1/djgpp2/include
c:/progra~1/progra~1/djgpp2/lang/cxx
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp/2.81/include
c:/progra~1/progra~1/djgpp2/include
End of search list.
c:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81\cc1plus.exe
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccaqdtjh -quiet -dumpbase -.cc -
version -o c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccbqdtjh
GNU C++ version 2.8.1 (djgpp) compiled by GNU C version 2.8.1.
c:/progra~1/progra~1/djgpp2/bin/as.exe -v -o
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\cccqdtjh
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\ccbqdtjh
GNU assembler version 2.8.1 (i386-pc-msdosdjgpp)
c:/progra~1/progra~1/djgpp2/bin/ld.exe -o /dev/null
c:/progra~1/progra~1/djgpp2/lib/crt0.o -Lc:/progra~1/progra~1/djgpp2/lib
-Lc:/progra~1/progra~1/djgpp2/lib/gcc-lib/djgpp\2.81 -
Lc:/progra~1/progra~1/djgpp2/bin -Lc:/progra~1/progra~1/djgpp2/lib -v
c:/progra~1/progra~1/djgpp2/tmp/RHaaaaaa\cccqdtjh -Tdjgpp.djl -lgcc -lc -
lgcc
GNU ld version 2.8.1 (with BFD 2.8.1)
c:/progra~1/progra~1/djgpp2/bin/stubify.exe -v /dev/null
Warning: input file is not COFF or stubbed COFF
.exe: No such file or directory (ENOENT)
stubify for djgpp V2.X executables, Copyright (C) 1995 DJ Delorie
End of the sample
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