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Thu Aug 31 13:23:35 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/unix/i386/brk.S [PIC]: Set __curbrk through the GOT. Rewrote i386 setjmp code in assembly, so as to avoid fighting with the compiler for the register values. * sysdeps/i386/setjmp.S, sysdeps/i386/__longjmp.S: New files. * sysdeps/i386/setjmp.c, sysdeps/i386/__longjmp.c: Files removed. * sysdeps/i386/jmp_buf.h [! _ASM] (__jmp_buf): Define as array of ints. [__USE_MISC || _ASM] (JB_*): New macros, for indices therein. (_JMPBUF_UNWINDS): Use JB_SP.
51 lines
1.4 KiB
ArmAsm
51 lines
1.4 KiB
ArmAsm
/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sysdep.h>
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#ifndef SYS_brk
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#define SYS_brk 17
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#endif
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.data
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.globl C_SYMBOL_NAME(__curbrk)
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C_LABEL(__curbrk)
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#ifdef HAVE_GNU_LD
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.long C_SYMBOL_NAME(_end)
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#else
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.long C_SYMBOL_NAME(end)
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#endif
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.text
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SYSCALL__ (brk, 1)
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movl 4(%esp), %eax
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#ifdef PIC
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/* Standard PIC nonsense to store into `__curbrk' through the GOT. */
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call here
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here: popl %ecx
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addl $_GLOBAL_OFFSET_TABLE_+[.-here], %ecx
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movl C_SYMBOL_NAME(__curbrk@GOT)(%ecx), %ecx
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movl %eax, (%ecx)
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#else
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movl %eax, C_SYMBOL_NAME(__curbrk)
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#endif
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xorl %eax, %eax
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ret
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weak_alias (__brk, brk)
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