| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Port of uClibc for TMS320C6000 DSP architecture |
| 3 | * Copyright (C) 2004 Texas Instruments Incorporated |
| 4 | * Author of TMS320C6000 port: Aurelien Jacquiot |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU Library General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License |
| 14 | * for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Library General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <unistd.h> |
| 23 | #include <sys/syscall.h> |
| 24 | #include <errno.h> |
| 25 | |
| 26 | libc_hidden_proto(brk) |
| 27 | |
| 28 | /* This must be initialized data because commons can't have aliases. */ |
| 29 | void * __curbrk attribute_hidden = 0; |
| 30 | |
| 31 | int brk (void *addr) |
| 32 | { |
| 33 | void *newbrk; |
| 34 | |
| 35 | __asm__ __volatile__ ( \ |
| 36 | "mv .d1 %2, A4\n\t" \ |
| 37 | "mvk .s2 %1, B0\n\t" \ |
| 38 | "swe\n\t" \ |
| 39 | "nop\n\t" \ |
| 40 | "mv .d2 B0, %0" \ |
| 41 | : "=b" (newbrk) \ |
| 42 | : "i" (__NR_brk), \ |
| 43 | "a" (addr) \ |
| 44 | : "memory", "cc", "B0", "A4"); \ |
| 45 | |
| 46 | __curbrk = newbrk; |
| 47 | |
| 48 | if (newbrk < addr) { |
| 49 | __set_errno (ENOMEM); |
| 50 | return -1; |
| 51 | } |
| 52 | return 0; |
| 53 | } |
| 54 | libc_hidden_def(brk) |