mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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97 lines
2.6 KiB
PHP
97 lines
2.6 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 2019 by Free Pascal development team
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This file implements parts of the startup code for OpenBSD
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programs that don't link to the C library.
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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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.
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**********************************************************************}
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{$asmmode att}
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procedure _FPC_proc___start(argc: LongInt; argv: PPAnsiChar; envp: Pointer; cleanup: TCdeclProcedure); cdecl; forward;
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procedure _FPC_proc_start; assembler; nostackframe; public name '_start'; public name '__start';
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asm
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movl %esp,%ebp
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andl $0xFFFFFFF0,%esp
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pushl %edx
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movl 0(%ebp),%eax
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leal 8(%ebp,%eax,4),%ecx
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leal 4(%ebp),%edx
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pushl %ecx
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pushl %edx
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pushl %eax
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xorl %ebp,%ebp
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call _FPC_proc___start
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end;
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procedure _FPC_proc_haltproc; cdecl; noreturn; forward;
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function _strrchr(str: PAnsiChar; character: LongInt): PAnsiChar; forward;
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procedure _FPC_proc___start(argc: LongInt; argv: PPAnsiChar; envp: Pointer; cleanup: TCdeclProcedure); cdecl;
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var
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I: SizeUInt;
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begin
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environ:=envp;
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operatingsystem_parameter_envp:=envp;
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operatingsystem_parameter_argc:=argc;
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operatingsystem_parameter_argv:=argv;
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if argv[0]<>nil then
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begin
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__progname:=_strrchr(argv[0], Ord('/'));
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if __progname<>nil then
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Inc(__progname)
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else
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__progname:=argv[0];
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I:=Low(__progname_storage);
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while (I<High(__progname_storage)) and (__progname[I]<>#0) do
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begin
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__progname_storage[I]:=__progname[I-Low(__progname_storage)];
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Inc(I);
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end;
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__progname_storage[I]:=#0;
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__progname:=@__progname_storage;
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end;
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PascalMain;
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asm
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jmp _FPC_proc_haltproc
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end;
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end;
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procedure _FPC_proc_haltproc; cdecl; noreturn; public name '_haltproc';
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var
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ExitCode: LongInt;
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begin
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ExitCode:=operatingsystem_result;
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asm
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.Lendless:
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pushl ExitCode
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mov $1,%eax
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call .Lactualsyscall
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jmp .Lendless
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.Lactualsyscall:
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int $0x80
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ret
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end;
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end;
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function _strrchr(str: PAnsiChar; character: LongInt): PAnsiChar; public name '_strrchr';
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begin
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_strrchr:=nil;
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repeat
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if str^=Chr(character) then
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_strrchr:=str;
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if str^<>#0 then
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Inc(str);
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until str^=#0;
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end;
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