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32bits
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ext2-os2
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devhlp32
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DevHlp32_GetInfoSegs.asm
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Assembly Source File
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1997-03-16
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4KB
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136 lines
;
; $Header: d:\\32bits\\ext2-os2\\devhlp32\\rcs\\DevHlp32_GetInfoSegs.asm,v 1.3 1997/03/15 16:38:23 Willm Exp $
;
; 32 bits OS/2 device driver and IFS support. Provides 32 bits kernel
; services (DevHelp) and utility functions to 32 bits OS/2 ring 0 code
; (device drivers and installable file system drivers).
; Copyright (C) 1995, 1996, 1997 Matthieu WILLM (willm@ibm.net)
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
.386p
INCL_DOSERRORS equ 1
include bseerr.inc
include devhlp.inc
include segdef.inc
include r0thunk.inc
SAS_SIG equ "SAS "
SAS struc
SAS_signature db 4 dup (?)
SAS_tables_data dw ? ; offset to tables section
SAS_flat_sel dw ? ; FLAT selector for kernel data
SAS_config_data dw ? ; offset to configuration section
SAS_dd_data dw ? ; offset to device driver section
SAS_vm_data dw ? ; offset to Virtual Memory section
SAS_task_data dw ? ; offset to Tasking section
SAS_RAS_data dw ? ; offset to RAS section
SAS_file_data dw ? ; offset to File System section
SAS_info_data dw ? ; offset to infoseg section
SAS ends
;/* Information Segment section */
SAS_info_section struc
SAS_info_global dw ? ; selector for global info seg
SAS_info_local dd ? ; address of curtask local infoseg
SAS_info_localRM dd ? ; address of DOS task's infoseg
SAS_info_CDIB dw ? ; selector for Codepage Data Information Block (CDIB)
SAS_info_section ends
extrn SAS_SEL : abs
CODE16 segment
ASSUME CS:CODE16, DS:FLAT
public thunk16$DevHlp32_GetInfoSegs_1
public thunk16$DevHlp32_GetInfoSegs_2
thunk16$DevHlp32_GetInfoSegs_1:
call [DevHelp2]
; jmp far ptr FLAT:thunk32$DevHlp32_GetInfoSegs_1
jmp32 thunk32$DevHlp32_GetInfoSegs_1
thunk16$DevHlp32_GetInfoSegs_2:
call [DevHelp2]
jmp32 thunk32$DevHlp32_GetInfoSegs_2
; jmp far ptr FLAT:thunk32$DevHlp32_GetInfoSegs_2
CODE16 ends
CODE32 segment
ASSUME CS:FLAT, DS:FLAT, ES:FLAT, SS:NOTHING
public DevHlp32_GetInfoSegs
public thunk32$DevHlp32_GetInfoSegs_1
public thunk32$DevHlp32_GetInfoSegs_2
;
; int DH32ENTRY DevHlp32_GetInfoSegs(
; struct InfoSeg_LDT **ppLocInfoSeg, [ebp + 8]
; struct InfoSeg_GDT **ppSysInfoSeg [ebp + 12]
; );
;
DevHlp32_GetInfoSegs proc near
push ebp
mov ebp, esp
push es
push ebx
push esi
push edi
mov esi, [ebp + 8]
mov edi, [ebp + 8]
mov eax, SAS_SEL
mov es, eax
xor ebx, ebx
movzx ebx, word ptr es:[ebx].SAS_info_data
movzx eax, word ptr es:[ebx].SAS_info_global
xor esi, esi
mov edx, DevHlp_VirtToLin
jmp far ptr thunk16$DevHlp32_GetInfoSegs_1
thunk32$DevHlp32_GetInfoSegs_1:
jc short @@error
mov ecx, [ebp + 8]
mov [ecx], eax
movzx esi, word ptr es:[ebx].SAS_info_local
movzx eax, word ptr es:[ebx + 2].SAS_info_local
mov edx, DevHlp_VirtToLin
jmp far ptr thunk16$DevHlp32_GetInfoSegs_2
thunk32$DevHlp32_GetInfoSegs_2:
jc short @@error
mov ecx, [ebp + 12]
mov [ecx], eax
mov eax, NO_ERROR
@@error:
pop edi
pop esi
pop ebx
pop es
leave
ret
DevHlp32_GetInfoSegs endp
CODE32 ends
end