| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* brk system call for Linux/ppc. |
| 2 | Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #include <features.h> |
| 21 | #include "ppc_asm.h" |
| 22 | #define _ERRNO_H 1 |
| 23 | #include <bits/errno.h> |
| 24 | #include <sys/syscall.h> |
| 25 | |
| 26 | #ifdef __NR_brk |
| 27 | |
| 28 | #ifdef __PIC__ |
| 29 | .section .bss |
| 30 | .align 4 |
| 31 | .globl __curbrk |
| 32 | .hidden __curbrk |
| 33 | __curbrk: .skip 4 |
| 34 | .type __curbrk,@object |
| 35 | .size __curbrk,4 |
| 36 | #else |
| 37 | .comm __curbrk, 4,4 |
| 38 | #endif |
| 39 | |
| 40 | .text |
| 41 | .globl brk |
| 42 | .type brk,@function |
| 43 | .align 2 |
| 44 | |
| 45 | brk: |
| 46 | stwu r1,-16(r1) |
| 47 | stw r3,8(r1) |
| 48 | li 0, __NR_brk; |
| 49 | sc |
| 50 | lwz r6,8(r1) |
| 51 | #ifdef __PIC__ |
| 52 | mflr r4 |
| 53 | # ifdef HAVE_ASM_PPC_REL16 |
| 54 | bcl 20,31,1f |
| 55 | 1: mflr r5 |
| 56 | addis r5,r5,_GLOBAL_OFFSET_TABLE_-1b@ha |
| 57 | addi r5,r5,_GLOBAL_OFFSET_TABLE_-1b@l |
| 58 | # else |
| 59 | bl _GLOBAL_OFFSET_TABLE_@local-4 |
| 60 | mflr r5 |
| 61 | # endif |
| 62 | lwz r5,__curbrk@got(r5) |
| 63 | mtlr r4 |
| 64 | stw r3,0(r5) |
| 65 | #else |
| 66 | lis r4,__curbrk@ha |
| 67 | stw r3,__curbrk@l(r4) |
| 68 | #endif |
| 69 | cmplw r6,r3 |
| 70 | addi r1,r1,16 |
| 71 | li r3,0 |
| 72 | blelr+ |
| 73 | li r3,ENOMEM |
| 74 | |
| 75 | b __syscall_error |
| 76 | |
| 77 | .size brk,.-brk |
| 78 | |
| 79 | libc_hidden_def(brk) |
| 80 | #endif |