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 gas}
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procedure _FPC_proc___start(argc: LongInt; argv: PPChar; envp: Pointer; para1, para2, para3: QWord); 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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movq %rbx,%r9
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movq %rcx,%r8
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movq %rdx,%rcx
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movq (%rsp),%rdi
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leaq 16(%rsp,%rdi,8),%rdx
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leaq 8(%rsp),%rsi
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subq $8,%rsp
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andq $0xFFFFFFFFFFFFFFF0,%rsp
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addq $8,%rsp
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jmp _FPC_proc___start
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end;
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procedure _FPC_proc_haltproc; forward;
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function _strrchr(str: PChar; character: LongInt): PChar; forward;
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procedure _FPC_proc___start(argc: LongInt; argv: PPChar; envp: Pointer; para1, para2, para3: QWord);
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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; assembler; nostackframe; public name '_haltproc';
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asm
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movq $1,%rax
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movl operatingsystem_result(%rip),%ebx
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pushq %rbx
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call .Lactualsyscall
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addq $8,%rsp
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jmp _FPC_proc_haltproc
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.Lactualsyscall:
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int $0x80
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jb .LErrorcode
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xor %rbx,%rbx
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ret
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.LErrorcode:
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movq %rax,%rbx
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movq $-1,%rax
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end;
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function _strrchr(str: PChar; character: LongInt): PChar; 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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