fpc/rtl/linux/xtensa/si_c.inc

{
    This file is part of the Free Pascal run time library.
    Copyright (c) 2019 by Jeppe Johansen.

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    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.

 **********************************************************************}

{******************************************************************************
                          Process start/halt
 ******************************************************************************}

var
  dlexitproc : pointer;

var
  BSS_START: record end; external name '__bss_start';
  STACK_PTR: record end; external name '__stkptr';

  libc_init_proc: TProcedure; weakexternal name '_init';
  libc_fini_proc: TProcedure; weakexternal name '_fini';

procedure libc_start_main(main: TProcedure; argc: ptruint; argv: ppchar; init, fini, rtld_fini: TProcedure; stack_end: pointer); cdecl; external name '__libc_start_main';
procedure libc_exit(code: ptruint); cdecl; external name 'exit';

procedure _FPC_xtensa_enter(at_exit: TProcedure; sp: pptruint);
  var
    argc: ptruint;
    argv: ppchar;
  begin
    argc:=sp[0];
    argv:=@sp[1];

    initialstkptr:=sp;
    operatingsystem_parameter_argc:=argc;
    operatingsystem_parameter_argv:=argv;
    operatingsystem_parameter_envp:=@sp[1+argc];

    libc_start_main(@PascalMain, argc, argv, libc_init_proc, libc_fini_proc, at_exit, sp);
  end;


procedure _FPC_proc_start; assembler; public name '_start';
  asm
    ill
  end;


procedure _FPC_xtensa_exit(e:longint); assembler;
  asm
    mov a6,a3
    movi a2,119
    syscall
  end;


procedure _FPC_proc_haltproc(e:longint); cdecl; public name '_haltproc';
  begin
    while true do
      begin
        libc_exit(e);
        _FPC_xtensa_exit(e);
      end;
  end;