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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [i386/] [cygmon-crt0.S] - Blame information for rev 357

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Line No. Rev Author Line
1 207 jeremybenn
/*
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 * crt0 startup code for user programs running under Cygmon
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 *
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 * Copyright (c) 1998, 2000 Cygnus Support
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 *
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 * The authors hereby grant permission to use, copy, modify, distribute,
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 * and license this software and its documentation for any purpose, provided
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 * that existing copyright notices are retained in all copies and that this
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 * notice is included verbatim in any distributions. No written agreement,
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 * license, or royalty fee is required for any of the authorized uses.
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 * Modifications to this software may be copyrighted by their authors
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 * and need not follow the licensing terms described here, provided that
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 * the new terms are clearly indicated on the first page of each file where
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 * they apply.
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 */
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#define _S2(P,X) P ## X
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#define _S1(P,X) _S2(P,X)
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#define SYM(X) _S1(__USER_LABEL_PREFIX__,X)
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.data
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        .align  8
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SYM(environ):
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        .long   0
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SYM(argc):
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        .long   0
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        .text
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        .align 4
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        .globl __start
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__start:
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        /* see if the stack is already setup. if not, then default
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         *  to using the value of %sp as set by the ROM monitor
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         */
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        movl    $__stack, %eax
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        testl   %eax, %eax
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        jz      1f
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        movl    %eax, %esp
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1:
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        mov $0, %ebp
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        movl    $__bss_start, %edi
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        movl    $__bss_end, %ecx
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        subl    %edi, %ecx
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        xorl    %eax, %eax
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        rep; stosb
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        pushl   $SYM(__sigtramp)
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        pushl   $0
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        call    SYM(__install_signal_handler)
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        popl    %eax
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        pushl   $SYM(__do_global_dtors)
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        call    SYM(atexit)
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        popl    %eax
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        call    SYM(__do_global_ctors)
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        pushl   $SYM(argc)
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        call    SYM(__get_program_arguments)
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        popl    %ecx
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        movl    SYM(argc), %ecx
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        pushl   %eax
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        pushl   %ecx
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        call    SYM(main)
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        popl    %ecx
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        popl    %edx
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        /* call exit from the C library so atexit gets called, and the
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         * C++ destructors get run. This calls our exit routine below
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         * when it's done.
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         */
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        pushl   %eax
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        call    SYM(exit)
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3:
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        jmp     3b

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