git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d2f5be2a | 1 | /* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc. |
| 28f540f4 RM |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <sysdep.h> | |
| 20 | ||
| d2f5be2a UD |
21 | .data |
| 22 | .globl C_SYMBOL_NAME(__curbrk) | |
| 23 | C_LABEL(__curbrk) | |
| d2f5be2a | 24 | .long C_SYMBOL_NAME(_end) |
| d2f5be2a UD |
25 | |
| 26 | .text | |
| d2f5be2a | 27 | |
| c14e4c32 | 28 | SYSCALL_ERROR_HANDLER |
| d2f5be2a UD |
29 | ENTRY (__brk) |
| 30 | movl %ebx, %edx | |
| 31 | movl $SYS_ify(brk), %eax | |
| 32 | movl 4(%esp), %ebx | |
| 33 | int $0x80 | |
| 34 | movl %edx, %ebx | |
| 35 | ||
| 36 | cmpl 4(%esp), %eax | |
| efc755b2 | 37 | jne syscall_error |
| d2f5be2a UD |
38 | |
| 39 | #ifdef PIC | |
| 40 | /* Standard PIC nonsense to store into `__curbrk' through the GOT. */ | |
| 41 | call here | |
| 42 | here: popl %ecx | |
| 43 | addl $_GLOBAL_OFFSET_TABLE_+[.-here], %ecx | |
| 44 | movl C_SYMBOL_NAME(__curbrk@GOT)(%ecx), %ecx | |
| 45 | movl %eax, (%ecx) | |
| 46 | #else | |
| 47 | movl %eax, C_SYMBOL_NAME(__curbrk) | |
| 48 | #endif | |
| 49 | xorl %eax, %eax | |
| 28f540f4 RM |
50 | ret |
| 51 | ||
| d2f5be2a | 52 | weak_alias (__brk, brk) |