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/*
* crt0 startup code for user programs running under Cygmon
*
* Copyright (c) 1998 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#ifndef NEED_UNDERSCORE
#define SYM(X) X
#else
#define SYM(X) _ ## X
#endif
.data
.align 8
SYM(environ):
.long 0
SYM(argc):
.long 0
.text
.align 4
.globl SYM(_start)
SYM(_start):
/* see if the stack is already setup. if not, then default
* to using the value of %sp as set by the ROM monitor
*/
lea __stack,%eax
cmpl $0,%eax
jz 1f
mov %eax, %esp
1:
mov $0, %ebp
lea __bss_start, %eax
2:
movb $0,(%eax)
inc %eax
cmp $__bss_end,%eax
jl 2b
2:
pushl $SYM(__sigtramp)
pushl $0
call SYM(__install_signal_handler)
add $4, %esp
pushl $SYM(__do_global_dtors)
call SYM(atexit)
add $4, %esp
call SYM(__do_global_ctors)
pushl $SYM(argc)
call SYM(__get_program_arguments)
add $4, %esp
pushl %eax
lea SYM(argc), %ebx
pushl (%ebx)
call SYM(main)
add $8, %esp
/* call exit from the C library so atexit gets called, and the
* C++ destructors get run. This calls our exit routine below
* when it's done.
*/
pushl %eax
call SYM(exit)
3:
jmp 3b
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