diff options
author | Ranjith Kumaran <ranjith@cygnus.com> | 2000-03-18 01:48:54 +0300 |
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committer | Ranjith Kumaran <ranjith@cygnus.com> | 2000-03-18 01:48:54 +0300 |
commit | 03261851a10dd2d6900a0a00a7515a0a46fb5d76 (patch) | |
tree | 7c22ac6cbbc99fd5cd1b5426853be8d4fd7bfcf1 /libgloss/i386/cygmon-crt0.S | |
parent | fae4c299f14fc23e2829c8656992eba21f79242a (diff) |
20000317 sourceware import
Diffstat (limited to 'libgloss/i386/cygmon-crt0.S')
-rw-r--r-- | libgloss/i386/cygmon-crt0.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libgloss/i386/cygmon-crt0.S b/libgloss/i386/cygmon-crt0.S new file mode 100644 index 000000000..9be020917 --- /dev/null +++ b/libgloss/i386/cygmon-crt0.S @@ -0,0 +1,82 @@ +/* + * 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 |