1/* $NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $ */ 2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h>
| 1/* $NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $ */ 2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h>
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36__FBSDID("$FreeBSD: head/lib/libc/mips/sys/sbrk.S 178580 2008-04-26 12:08:02Z imp $");
| 36__FBSDID("$FreeBSD: head/lib/libc/mips/sys/sbrk.S 209231 2010-06-16 12:55:14Z jchandra $");
|
37#include "SYS.h" 38 39#if defined(LIBC_SCCS) && !defined(lint) 40 ASMSTR("from: @(#)sbrk.s 8.1 (Berkeley) 6/4/93") 41 ASMSTR("$NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $") 42#endif /* LIBC_SCCS and not lint */ 43 44 .globl _C_LABEL(__curbrk) 45 .globl _C_LABEL(_end) 46 47 .data 48_C_LABEL(__curbrk): 49 .word _C_LABEL(_end) 50 .text 51 52LEAF(__sys_sbrk) 53 WEAK_ALIAS(sbrk, __sys_sbrk) 54 WEAK_ALIAS(_sbrk, __sys_sbrk)
| 37#include "SYS.h" 38 39#if defined(LIBC_SCCS) && !defined(lint) 40 ASMSTR("from: @(#)sbrk.s 8.1 (Berkeley) 6/4/93") 41 ASMSTR("$NetBSD: sbrk.S,v 1.16 2005/04/22 06:58:01 simonb Exp $") 42#endif /* LIBC_SCCS and not lint */ 43 44 .globl _C_LABEL(__curbrk) 45 .globl _C_LABEL(_end) 46 47 .data 48_C_LABEL(__curbrk): 49 .word _C_LABEL(_end) 50 .text 51 52LEAF(__sys_sbrk) 53 WEAK_ALIAS(sbrk, __sys_sbrk) 54 WEAK_ALIAS(_sbrk, __sys_sbrk)
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55#ifdef __ABICALLS__ 56 .set noreorder 57 .cpload t9 58 .set reorder 59#endif 60 addu sp, sp, -16 61 sw s0, 0(sp) # Preserve s0 value in stack 62 # it should be the same on return 63 # We can't use v1 as temporary 64 # register since syscall uses it 65 # to return 64-bit values 66 lw s0, _C_LABEL(__curbrk) 67 li v0, SYS_break 68 addu a0, a0, s0 # compute current break
| 55 PIC_PROLOGUE(__sys_sbrk) 56 PTR_LA t0, _C_LABEL(__curbrk) 57 PTR_L t0, 0(t0) 58 PTR_ADDU a0, a0, t0
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69
| 59
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| 60 li v0, SYS_break
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70 syscall 71 72 bne a3, zero, 1f 73 nop
| 61 syscall 62 63 bne a3, zero, 1f 64 nop
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74 move v0, s0 # return old val of curbrk from above 75 lw s0, 0(sp) 76 addu sp, sp, 16 77 sw a0, _C_LABEL(__curbrk) # save current val of curbrk from above
| 65 move v0, t0 # return old val of curbrk from above 66 PTR_LA t0, _C_LABEL(__curbrk) 67 PTR_S a0, 0(t0) # save current val of curbrk from above 68 PIC_RETURN()
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78 j ra 79 801:
| 69 j ra 70 711:
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81 lw s0, 0(sp) 82 addu sp, sp, 16 83 la t9, _C_LABEL(__cerror) 84 jr t9
| 72 PIC_TAILCALL(__cerror)
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85END(__sys_sbrk)
| 73END(__sys_sbrk)
|