mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-13 02:29:36 +02:00
733 lines
17 KiB
ObjectPascal
733 lines
17 KiB
ObjectPascal
{****************************************************************************
|
|
|
|
FPK-Pascal -- OS/2 runtime library
|
|
|
|
Copyright (c) 1993,95 by Florian Kl„mpfl
|
|
Copyright (c) 1997 by Dani‰l Mantione
|
|
|
|
FPK-Pascal is distributed under the GNU Public License v2. So is this unit.
|
|
The GNU Public License requires you to distribute the source code of this
|
|
unit with any product that uses it. We grant you an exception to this, and
|
|
that is, when you compile a program with the FPK Pascal compiler, you do not
|
|
need to ship source code with that program, AS LONG AS YOU ARE USING
|
|
UNMODIFIED CODE! If you modify this code, you MUST change the next line:
|
|
|
|
<This an official, unmodified FPK Pascal source code file.>
|
|
|
|
Send us your modified files, we can work together if you want!
|
|
|
|
FPK-Pascal 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
|
|
Library GNU General Public License for more details.
|
|
|
|
You should have received a copy of the Library GNU General Public License
|
|
along with FPK-Pascal; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA.
|
|
|
|
****************************************************************************}
|
|
|
|
unit sysos2;
|
|
|
|
{Changelog:
|
|
|
|
People:
|
|
|
|
DM - Dani‰l Mantione
|
|
|
|
Date: Description of change: Changed by:
|
|
|
|
- First released version 0.1. DM
|
|
|
|
Coding style:
|
|
|
|
My coding style is a bit unusual for Pascal. Nevertheless I friendly ask
|
|
you to try to make your changes not look all to different. In general,
|
|
set your IDE to use tab characters, optimal fill on and a tabsize of 4.}
|
|
|
|
{$I os.inc}
|
|
|
|
interface
|
|
|
|
{Link the startup code.}
|
|
{$l prt1.oo2}
|
|
|
|
{$I SYSTEMH.INC}
|
|
{$I heaph.inc}
|
|
|
|
type Tos=(osDOS,osOS2,osDPMI);
|
|
|
|
var os_mode:Tos;
|
|
first_meg:pointer;
|
|
|
|
type Psysthreadib=^Tsysthreadib;
|
|
Pthreadinfoblock=^Tthreadinfoblock;
|
|
Pprocessinfoblock=^Tprocessinfoblock;
|
|
|
|
Tbytearray=array[0..$ffff] of byte;
|
|
Pbytearray=^Tbytearray;
|
|
|
|
Tsysthreadib=record
|
|
tid,
|
|
priority,
|
|
version:longint;
|
|
MCcount,
|
|
MCforceflag:word;
|
|
end;
|
|
|
|
Tthreadinfoblock=record
|
|
pexchain,
|
|
stack,
|
|
stacklimit:pointer;
|
|
tib2:Psysthreadib;
|
|
version,
|
|
ordinal:longint;
|
|
end;
|
|
|
|
Tprocessinfoblock=record
|
|
pid,
|
|
parentpid,
|
|
hmte:longint;
|
|
cmd,
|
|
env:Pbytearray;
|
|
flstatus,
|
|
ttype:longint;
|
|
end;
|
|
|
|
const UnusedHandle=$ffff;
|
|
StdInputHandle=0;
|
|
StdOutputHandle=1;
|
|
StdErrorHandle=2;
|
|
|
|
implementation
|
|
|
|
{ die betriebssystemunabhangigen Implementationen einfuegen: }
|
|
|
|
{$I SYSTEM.INC}
|
|
|
|
procedure dosgetinfoblocks(var Atib:Pthreadinfoblock;
|
|
var Apib:Pprocessinfoblock);
|
|
external 'DOSCALLS' index 312;
|
|
|
|
{***************************************************************************
|
|
|
|
Runtime error checking related routines.
|
|
|
|
***************************************************************************}
|
|
|
|
{$S-}
|
|
procedure st1(stack_size:longint);[public,alias: 'STACKCHECK'];
|
|
|
|
begin
|
|
{ called when trying to get local stack }
|
|
{ if the compiler directive $S is set }
|
|
asm
|
|
movl stack_size,%ebx
|
|
movl %esp,%eax
|
|
subl %ebx,%eax
|
|
{$ifdef SYSTEMDEBUG}
|
|
movl U_SYSOS2_LOWESTSTACK,%ebx
|
|
cmpl %eax,%ebx
|
|
jb _is_not_lowest
|
|
movl %eax,U_SYSOS2_LOWESTSTACK
|
|
_is_not_lowest:
|
|
{$endif SYSTEMDEBUG}
|
|
cmpb $2,U_SYSOS2_OS_MODE
|
|
jne _running_in_dos
|
|
movl U_SYSOS2_STACKBOTTOM,%ebx
|
|
jmp _running_in_os2
|
|
_running_in_dos:
|
|
movl __heap_brk,%ebx
|
|
_running_in_os2:
|
|
cmpl %eax,%ebx
|
|
jae __short_on_stack
|
|
leave
|
|
ret $4
|
|
__short_on_stack:
|
|
end ['EAX','EBX'];
|
|
{ this needs a local variable }
|
|
{ so the function called itself !! }
|
|
{ Writeln('low in stack ');}
|
|
RunError(202);
|
|
end;
|
|
{no stack check in system }
|
|
|
|
{****************************************************************************
|
|
|
|
Miscelleanious related routines.
|
|
|
|
****************************************************************************}
|
|
|
|
procedure halt(errnum:byte);
|
|
|
|
begin
|
|
asm
|
|
movb $0x4c,%ah
|
|
movb errnum,%al
|
|
call ___SYSCALL
|
|
end;
|
|
end;
|
|
|
|
function paramcount:longint;
|
|
|
|
begin
|
|
asm
|
|
movl _argc,%eax
|
|
decl %eax
|
|
leave
|
|
ret
|
|
end ['EAX'];
|
|
end;
|
|
|
|
function paramstr(l:longint):string;
|
|
|
|
function args:pointer;
|
|
|
|
begin
|
|
asm
|
|
movl _argv,%eax
|
|
leave
|
|
ret
|
|
end ['EAX'];
|
|
end;
|
|
|
|
var p:^Pchar;
|
|
|
|
begin
|
|
if (l>=0) and (l<=paramcount) then
|
|
begin
|
|
p:=args;
|
|
paramstr:=strpas(p[l]);
|
|
end
|
|
else paramstr:='';
|
|
end;
|
|
|
|
procedure randomize;
|
|
|
|
var hl:longint;
|
|
|
|
begin
|
|
asm
|
|
movb $0x2c,%ah
|
|
call ___SYSCALL
|
|
movw %cx,-4(%ebp)
|
|
movw %dx,-2(%ebp)
|
|
end;
|
|
randseed:=hl;
|
|
end;
|
|
|
|
{****************************************************************************
|
|
|
|
Heap management releated routines.
|
|
|
|
****************************************************************************}
|
|
|
|
|
|
{ this function allows to extend the heap by calling
|
|
syscall $7f00 resizes the brk area}
|
|
|
|
function sbrk(size:longint):longint;
|
|
|
|
begin
|
|
asm
|
|
movl size,%edx
|
|
movw $0x7f00,%ax
|
|
call ___SYSCALL
|
|
movl %eax,__RESULT
|
|
end;
|
|
end;
|
|
|
|
function getheapstart:pointer;
|
|
|
|
begin
|
|
asm
|
|
movl __heap_base,%eax
|
|
leave
|
|
ret
|
|
end ['EAX'];
|
|
end;
|
|
|
|
{$i heap.inc}
|
|
|
|
{****************************************************************************
|
|
|
|
Low Level File Routines
|
|
|
|
****************************************************************************}
|
|
|
|
procedure allowslash(p:Pchar);
|
|
|
|
{Allow slash as backslash.}
|
|
|
|
var i:longint;
|
|
|
|
begin
|
|
for i:=0 to strlen(p) do
|
|
if p[i]='/' then p[i]:='\';
|
|
end;
|
|
|
|
procedure do_close(h:longint);
|
|
|
|
begin
|
|
asm
|
|
movb $0x3e,%ah
|
|
mov h,%ebx
|
|
call ___SYSCALL
|
|
end;
|
|
end;
|
|
|
|
procedure do_erase(p:Pchar);
|
|
|
|
begin
|
|
allowslash(p);
|
|
asm
|
|
movl 8(%ebp),%edx
|
|
movb $0x41,%ah
|
|
call ___SYSCALL
|
|
jnc LERASE1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
LERASE1:
|
|
end;
|
|
end;
|
|
|
|
procedure do_rename(p1,p2:Pchar);
|
|
|
|
begin
|
|
allowslash(p1);
|
|
allowslash(p2);
|
|
asm
|
|
movl 8(%ebp),%edx
|
|
movl 12(%ebp),%edi
|
|
movb $0x56,%ah
|
|
call ___SYSCALL
|
|
jnc LRENAME1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
LRENAME1:
|
|
end;
|
|
end;
|
|
|
|
function do_read(h,addr,len:longint):longint;
|
|
|
|
begin
|
|
asm
|
|
movl 16(%ebp),%ecx
|
|
movl 12(%ebp),%edx
|
|
movl 8(%ebp),%ebx
|
|
movb $0x3f,%ah
|
|
call ___SYSCALL
|
|
jnc LDOSREAD1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
xorl %eax,%eax
|
|
LDOSREAD1:
|
|
leave
|
|
ret $12
|
|
end;
|
|
end;
|
|
|
|
function do_write(h,addr,len:longint) : longint;
|
|
|
|
begin
|
|
asm
|
|
movl 16(%ebp),%ecx
|
|
movl 12(%ebp),%edx
|
|
movl 8(%ebp),%ebx
|
|
movb $0x40,%ah
|
|
call ___SYSCALL
|
|
jnc LDOSWRITE1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
LDOSWRITE1:
|
|
movl %eax,-4(%ebp)
|
|
end;
|
|
end;
|
|
|
|
function do_filepos(handle:longint):longint;
|
|
|
|
begin
|
|
asm
|
|
movw $0x4201,%ax
|
|
movl 8(%ebp),%ebx
|
|
xorl %edx,%edx
|
|
call ___SYSCALL
|
|
jnc LDOSFILEPOS
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
xorl %eax,%eax
|
|
LDOSFILEPOS:
|
|
leave
|
|
ret $4
|
|
end;
|
|
end;
|
|
|
|
procedure do_seek(handle,pos:longint);
|
|
|
|
begin
|
|
asm
|
|
movw $0x4200,%ax
|
|
movl 8(%ebp),%ebx
|
|
movl 12(%ebp),%edx
|
|
call ___SYSCALL
|
|
jnc .LDOSSEEK1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
.LDOSSEEK1:
|
|
leave
|
|
ret $8
|
|
end;
|
|
end;
|
|
|
|
function do_seekend(handle:longint):longint;
|
|
|
|
begin
|
|
asm
|
|
movw $0x4202,%ax
|
|
movl 8(%ebp),%ebx
|
|
xorl %edx,%edx
|
|
call ___SYSCALL
|
|
jnc .Lset_at_end1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
xorl %eax,%eax
|
|
.Lset_at_end1:
|
|
leave
|
|
ret $4
|
|
end;
|
|
end;
|
|
|
|
function do_filesize(handle:longint):longint;
|
|
|
|
var aktfilepos:longint;
|
|
|
|
begin
|
|
aktfilepos:=do_filepos(handle);
|
|
do_filesize:=do_seekend(handle);
|
|
do_seek(handle,aktfilepos);
|
|
end;
|
|
|
|
procedure do_truncate(handle,pos:longint);
|
|
|
|
begin
|
|
asm
|
|
movl $0x4200,%eax
|
|
movl 8(%ebp),%ebx
|
|
movl 12(%ebp),%edx
|
|
call ___SYSCALL
|
|
jc .LTruncate1
|
|
movl 8(%ebp),%ebx
|
|
movl 12(%ebp),%edx
|
|
movl %ebp,%edx
|
|
xorl %ecx,%ecx
|
|
movb $0x40,%ah
|
|
call ___SYSCALL
|
|
jnc .LTruncate2
|
|
.LTruncate1:
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
.LTruncate2:
|
|
leave
|
|
ret $8
|
|
end;
|
|
end;
|
|
|
|
procedure do_open(var f;p:pchar;flags:longint);
|
|
|
|
{
|
|
filerec and textrec have both handle and mode as the first items so
|
|
they could use the same routine for opening/creating.
|
|
when (flags and $10) the file will be append
|
|
when (flags and $100) the file will be truncate/rewritten
|
|
when (flags and $1000) there is no check for close (needed for textfiles)
|
|
}
|
|
|
|
var oflags:byte;
|
|
|
|
begin
|
|
allowslash(p);
|
|
{ close first if opened }
|
|
if ((flags and $1000)=0) then
|
|
begin
|
|
case filerec(f).mode of
|
|
fminput,fmoutput,fminout : Do_Close(filerec(f).handle);
|
|
fmclosed:;
|
|
else
|
|
begin
|
|
inoutres:=102; {not assigned}
|
|
exit;
|
|
end;
|
|
end;
|
|
end;
|
|
{ reset file handle }
|
|
filerec(f).handle:=high(word);
|
|
oflags:=2;
|
|
{ convert filemode to filerec modes }
|
|
case (flags and 3) of
|
|
0 : begin
|
|
filerec(f).mode:=fminput;
|
|
oflags:=0;
|
|
end;
|
|
1 : filerec(f).mode:=fmoutput;
|
|
2 : filerec(f).mode:=fminout;
|
|
end;
|
|
if (flags and $100)<>0 then
|
|
begin
|
|
filerec(f).mode:=fmoutput;
|
|
oflags:=2;
|
|
end
|
|
else
|
|
if (flags and $10)<>0 then
|
|
begin
|
|
filerec(f).mode:=fmoutput;
|
|
oflags:=2;
|
|
end;
|
|
{ empty name is special }
|
|
if p[0]=#0 then
|
|
begin
|
|
case filerec(f).mode of
|
|
fminput:filerec(f).handle:=StdInputHandle;
|
|
fmappend,fmoutput : begin
|
|
filerec(f).handle:=StdOutputHandle;
|
|
filerec(f).mode:=fmoutput; {fool fmappend}
|
|
end;
|
|
end;
|
|
exit;
|
|
end;
|
|
if (flags and $100)<>0 then
|
|
{Use create function.}
|
|
asm
|
|
movb $0x3c,%ah
|
|
movl p,%edx
|
|
xorw %cx,%cx
|
|
call ___SYSCALL
|
|
jnc LOPEN1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
movw $0xffff,%ax
|
|
LOPEN1:
|
|
movl f,%edx
|
|
movw %ax,(%edx)
|
|
end
|
|
else
|
|
{Use open function.}
|
|
asm
|
|
movb $0x3d,%ah
|
|
movb oflags,%al
|
|
movl p,%edx
|
|
call ___SYSCALL
|
|
jnc LOPEN2
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
movw $0xffff,%ax
|
|
LOPEN2:
|
|
movl f,%edx
|
|
movw %ax,(%edx)
|
|
end;
|
|
if (flags and $10)<>0 then
|
|
do_seekend(filerec(f).handle);
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
UnTyped File Handling
|
|
*****************************************************************************}
|
|
|
|
{$i file.inc}
|
|
|
|
{*****************************************************************************
|
|
Typed File Handling
|
|
*****************************************************************************}
|
|
|
|
{$i typefile.inc}
|
|
|
|
{*****************************************************************************
|
|
Text File Handling
|
|
*****************************************************************************}
|
|
|
|
{$DEFINE EOF_CTRLZ}
|
|
|
|
{$i text.inc}
|
|
|
|
{****************************************************************************
|
|
|
|
Directory related routines.
|
|
|
|
****************************************************************************}
|
|
|
|
{*****************************************************************************
|
|
Directory Handling
|
|
*****************************************************************************}
|
|
|
|
procedure dosdir(func:byte;const s:string);
|
|
|
|
var buffer:array[0..255] of char;
|
|
|
|
begin
|
|
move(s[1],buffer,length(s));
|
|
buffer[length(s)]:=#0;
|
|
allowslash(Pchar(@buffer));
|
|
asm
|
|
leal buffer,%edx
|
|
movb 8(%ebp),%ah
|
|
call ___SYSCALL
|
|
jnc .LDOS_DIRS1
|
|
movw %ax,U_SYSOS2_INOUTRES;
|
|
.LDOS_DIRS1:
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure mkdir(const s : string);
|
|
|
|
begin
|
|
DosDir($39,s);
|
|
end;
|
|
|
|
|
|
procedure rmdir(const s : string);
|
|
|
|
begin
|
|
DosDir($3a,s);
|
|
end;
|
|
|
|
procedure chdir(const s : string);
|
|
|
|
begin
|
|
DosDir($3b,s);
|
|
end;
|
|
|
|
procedure getdir(drivenr : byte;var dir : string);
|
|
|
|
{Written by Michael Van Canneyt.}
|
|
|
|
var temp:array[0..255] of char;
|
|
sof:Pchar;
|
|
i:byte;
|
|
|
|
begin
|
|
sof:=pchar(@dir[4]);
|
|
{ dir[1..3] will contain '[drivenr]:\', but is not }
|
|
{ supplied by DOS, so we let dos string start at }
|
|
{ dir[4] }
|
|
{ Get dir from drivenr : 0=default, 1=A etc... }
|
|
asm
|
|
movb drivenr,%dl
|
|
movl sof,%esi
|
|
mov $0x47,%ah
|
|
call ___SYSCALL
|
|
end;
|
|
{ Now Dir should be filled with directory in ASCIIZ, }
|
|
{ starting from dir[4] }
|
|
dir[0]:=#3;
|
|
dir[2]:=':';
|
|
dir[3]:='\';
|
|
i:=4;
|
|
{Conversion to Pascal string }
|
|
while (dir[i]<>#0) do
|
|
begin
|
|
{ convert path name to DOS }
|
|
if dir[i]='/' then
|
|
dir[i]:='\';
|
|
dir[0]:=char(i);
|
|
inc(i);
|
|
end;
|
|
{ upcase the string (FPKPascal function) }
|
|
dir:=upcase(dir);
|
|
if drivenr<>0 then { Drive was supplied. We know it }
|
|
dir[1]:=char(65+drivenr-1)
|
|
else
|
|
begin
|
|
{ We need to get the current drive from DOS function 19H }
|
|
{ because the drive was the default, which can be unknown }
|
|
asm
|
|
movb $0x19,%ah
|
|
call ___SYSCALL
|
|
addb $65,%al
|
|
movb %al,i
|
|
end;
|
|
dir[1]:=char(i);
|
|
end;
|
|
end;
|
|
|
|
|
|
|
|
{****************************************************************************
|
|
|
|
System unit initialization.
|
|
|
|
****************************************************************************}
|
|
|
|
procedure OpenStdIO(var f:text;mode:word;hdl:longint);
|
|
|
|
begin
|
|
Assign(f,'');
|
|
TextRec(f).Handle:=hdl;
|
|
TextRec(f).Mode:=mode;
|
|
TextRec(f).InOutFunc:=@FileInOutFunc;
|
|
TextRec(f).FlushFunc:=@FileInOutFunc;
|
|
TextRec(f).Closefunc:=@fileclosefunc;
|
|
end;
|
|
|
|
var pib:Pprocessinfoblock;
|
|
tib:Pthreadinfoblock;
|
|
|
|
begin
|
|
{Determine the operating system we are running on.}
|
|
asm
|
|
movw $0x7f0a,%ax
|
|
call ___SYSCALL
|
|
test $512,%bx {Bit 9 is OS/2 flag.}
|
|
setnzb U_SYSOS2_OS_MODE
|
|
test $4096,%bx
|
|
jz _noRSX
|
|
movb $2,U_SYSOS2_OS_MODE
|
|
_noRSX:
|
|
end;
|
|
|
|
{Enable the brk area by initializing it with the initial heap size.}
|
|
asm
|
|
mov $0x7f01,%ax
|
|
movl HEAPSIZE,%edx
|
|
addl __heap_base,%edx
|
|
call ___SYSCALL
|
|
cmpl $-1,%eax
|
|
jnz _heapok
|
|
pushl $204
|
|
call _SYSOS2$$_RUNERROR$WORD
|
|
_heapok:
|
|
end;
|
|
|
|
{Now request, if we are running under DOS,
|
|
read-access to the first meg. of memory.}
|
|
if os_mode in [osDOS,osDPMI] then
|
|
asm
|
|
mov $0x7f13,%ax
|
|
xor %ebx,%ebx
|
|
mov $0xfff,%ecx
|
|
xor %edx,%edx
|
|
call ___SYSCALL
|
|
mov %eax,U_SYSOS2_FIRST_MEG
|
|
end
|
|
else
|
|
first_meg:=nil;
|
|
{At 0.9.2, case for enumeration does not work.}
|
|
case os_mode of
|
|
osDOS:
|
|
stackbottom:=0; {In DOS mode, heap_brk is also the
|
|
stack bottom.}
|
|
osOS2:
|
|
begin
|
|
dosgetinfoblocks(tib,pib);
|
|
stackbottom:=longint(tib^.stack);
|
|
end;
|
|
osDPMI:
|
|
stackbottom:=0; {Not sure how to get it, but seems to be
|
|
always zero.}
|
|
end;
|
|
exitproc:=nil;
|
|
|
|
{Initialize the heap.}
|
|
initheap;
|
|
|
|
{ to test stack depth }
|
|
loweststack:=maxlongint;
|
|
|
|
OpenStdIO(Input,fmInput,StdInputHandle);
|
|
OpenStdIO(Output,fmOutput,StdOutputHandle);
|
|
OpenStdIO(StdErr,fmOutput,StdErrorHandle);
|
|
|
|
{ kein Ein- Ausgabefehler }
|
|
inoutres:=0;
|
|
end.
|