diff options
Diffstat (limited to 'libgloss/i386/cygmon-crt0.S')
| -rw-r--r-- | libgloss/i386/cygmon-crt0.S | 73 |
1 files changed, 35 insertions, 38 deletions
diff --git a/libgloss/i386/cygmon-crt0.S b/libgloss/i386/cygmon-crt0.S index 9be020917..1c4535e07 100644 --- a/libgloss/i386/cygmon-crt0.S +++ b/libgloss/i386/cygmon-crt0.S @@ -1,7 +1,7 @@ /* * crt0 startup code for user programs running under Cygmon * - * Copyright (c) 1998 Cygnus Support + * Copyright (c) 1998, 2000 Cygnus Support * * The authors hereby grant permission to use, copy, modify, distribute, * and license this software and its documentation for any purpose, provided @@ -14,11 +14,9 @@ * they apply. */ -#ifndef NEED_UNDERSCORE -#define SYM(X) X -#else -#define SYM(X) _ ## X -#endif +#define _S2(P,X) P ## X +#define _S1(P,X) _S2(P,X) +#define SYM(X) _S1(__USER_LABEL_PREFIX__,X) .data .align 8 @@ -31,52 +29,51 @@ SYM(argc): .text .align 4 - .globl SYM(_start) -SYM(_start): + .globl __start +__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 + movl $__stack, %eax + testl %eax, %eax + jz 1f + movl %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 + movl $__bss_start, %edi + movl $__bss_end, %ecx + subl %edi, %ecx + xorl %eax, %eax + rep; stosb - pushl $SYM(__do_global_dtors) - call SYM(atexit) - add $4, %esp + pushl $SYM(__sigtramp) + pushl $0 + call SYM(__install_signal_handler) + popl %eax - call SYM(__do_global_ctors) + pushl $SYM(__do_global_dtors) + call SYM(atexit) + popl %eax - pushl $SYM(argc) - call SYM(__get_program_arguments) - add $4, %esp + call SYM(__do_global_ctors) - pushl %eax - lea SYM(argc), %ebx - pushl (%ebx) - call SYM(main) - add $8, %esp + pushl $SYM(argc) + call SYM(__get_program_arguments) + popl %ecx + + movl SYM(argc), %ecx + pushl %eax + pushl %ecx + call SYM(main) + popl %ecx + popl %edx /* 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 + pushl %eax call SYM(exit) 3: - jmp 3b + jmp 3b |