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/* Copyright (C) 1996 Robert de Bath <rdebath@cix.compulink.co.uk>
* This file is part of the Linux-8086 C library and is distributed
* under the GNU Library General Public License.
*/
#include <sys/types.h>
#include <errno.h>
#include <time.h>
#include <sys/times.h>
/* MSDOS has it's own versions */
#ifndef __MSDOS__
#ifdef __AS386_32__
/********************** Function __cstartup *******************************/
#ifdef L___cstart3
void (*__cleanup)() = 0;
char ** environ;
#asm
loc 2
call_main:
.long _main ! Segment 2 is the trailing pointers, main and the
.long call_exit ! routine to call exit.
#if __FIRST_ARG_IN_AX__
.data
saved_arg1:
.long 0
#endif
#if __CALLER_SAVES__
.data
loopy_safe:
.long 0
#endif
.text
export ___mkargv
___mkargv: ! BCC Tells linker to init argv ... none needed.
export ___cstartup
___cstartup: ! Crt0 startup (Linux style)
mov eax,[esp]
test eax,eax
jz call_exit ! If argc == 0 this is being called by ldd, exit.
mov eax,[esp+8]
mov [_environ],eax
#if __FIRST_ARG_IN_AX__
pop [saved_arg1] ! Argc will go into eax
#endif
mov esi,#auto_start ! Pointer to first autostart function
auto_run:
#if __FIRST_ARG_IN_AX__
mov eax,[saved_arg1]
#endif
#if __CALLER_SAVES__
mov [loopy_safe],esi
#endif
mov ebx,[esi]
test ebx,ebx
jz no_func
call ebx ! Call the function
no_func:
#if __CALLER_SAVES__
mov esi,[loopy_safe]
#endif
add esi,#4 ! SI at next
jmp auto_run ! And round for the next.
call_exit: ! Last item called by above.
pop ebx ! Be tidy.
#if !__FIRST_ARG_IN_AX__
push eax ! At the end the last called was main() push it`s
#endif
call _exit ! return val and call exit();
bad_exit:
jmp bad_exit ! Exit returned !!
export _exit
export __exit
_exit: ! exit(rv) function
#if __FIRST_ARG_IN_AX__
mov [saved_arg1],eax
#else
push [esp+4] ! Copy the `rv` for the exit fuctions.
#endif
mov ebx,[___cleanup] ! Call exit, normally this is `__do_exit`
test ebx,ebx
je no_clean ! But it`s default is null
call ebx
no_clean:
#if __FIRST_ARG_IN_AX__
mov eax,[saved_arg1]
#else
add esp,#4
#endif
__exit: ! _exit(rv)
br ___exit ! This is just an alias for __exit();
#endasm
#endif
/********************** Function ? ************************************/
/*---*/
#endif
#endif
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