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83 lines
1.7 KiB
ArmAsm
83 lines
1.7 KiB
ArmAsm
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/* Copyright (C) 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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.data
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.globl C_SYMBOL_NAME(__curbrk)
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.text
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.globl C_SYMBOL_NAME(syscall_error)
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ENTRY (__sbrk)
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movl %ebx, %edx
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#ifdef PIC
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/* Standard PIC nonsense to access `__curbrk' through the GOT. */
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call .L0
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.L0: popl %ecx
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addl $_GLOBAL_OFFSET_TABLE_+[.-.L0], %ecx
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movl C_SYMBOL_NAME(__curbrk@GOT)(%ecx), %ecx
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movl (%ecx), %ebx
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movl %ebx, %eax
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testl %ebx, %ebx
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jne .L1
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/* We have to initialize `__curbrk' first. */
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movl $SYS_ify(brk), %eax
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int $0x80
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movl %eax, (%ecx)
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movl %eax, %ebx
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.align 16, 0x90
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.L1:
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#else
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movl C_SYMBOL_NAME(__curbrk), %ebx
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movl %ebx, %eax
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#endif
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addl 4(%esp), %ebx
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cmpl %ebx, %eax
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je .L2
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movl $SYS_ify(brk), %eax
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int $0x80
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cmpl %eax, %ebx
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jne .L3
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#ifdef PIC
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xchgl %eax, (%ecx)
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#else
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xchgl %eax, C_SYMBOL_NAME(__curbrk)
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#endif
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.L2:
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movl %edx, %ebx
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ret
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.align 16
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.L3:
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movl %edx, %ebx
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jmp JUMPTARGET(syscall_error)
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weak_alias (__sbrk, sbrk)
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