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80 lines
2.6 KiB
PHP
80 lines
2.6 KiB
PHP
{
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$Id: syscall.inc,v 1.1 2003/01/08 22:32:28 marco Exp $
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Copyright (c) 1998-2000 by Florian Klaempfl
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This include implements the actual system call for the
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intel BeOS 80x86 platform.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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****************************************************************************
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}
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// Under BeOS, we use stdcall for this line because the default calling convention in 1.9
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// is register instead of stdcall. But assembler is already written, so i used the stdcall
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// calling convention !
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function Do_SysCall( callnr : longint; var regs : SysCallArgs ): longint; stdcall; assembler; [public, alias : 'FPC_SYSCALL'];
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{
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This routine sets up the parameters on the stack, all the parameters
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are in reverse order on the stack (like C parameter passing).
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}
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asm
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{ load the parameters... }
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movl regs,%eax
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movl 24(%eax),%ebx
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pushl %ebx
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movl 20(%eax),%ebx
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pushl %ebx
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movl 16(%eax),%ebx
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pushl %ebx
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movl 12(%eax),%ebx
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pushl %ebx
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movl 8(%eax),%ebx
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pushl %ebx
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movl 4(%eax),%ebx
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pushl %ebx
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movl 0(%eax),%ebx
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pushl %ebx
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{ set the call number }
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movl callnr,%eax
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call sys_call
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addl $28,%esp
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end;
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// Under BeOS, we use stdcall for this line because the default calling convention in 1.9
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// is register instead of stdcall. But assembler is already written, so i used the stdcall
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// calling convention ! Maybe don't needed here. But to be sure...
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Function SysCall( callnr:longint;var args : SysCallArgs ):longint; stdcall;
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{
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This function serves as an interface to do_SysCall.
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If the SysCall returned a negative number, it returns -1, and puts the
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SysCall result in errno. Otherwise, it returns the SysCall return value
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}
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var
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funcresult : longint;
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begin
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funcresult := do_SysCall(callnr, args);
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if funcresult < 0 then
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begin
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errno := funcresult;
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SysCall := - 1;
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end
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else
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begin
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SysCall := funcresult;
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errno := 0;
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end;
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end;
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