1*8618d94aSMatthew Dillon/*- 2*8618d94aSMatthew Dillon * Copyright (c) 1990 The Regents of the University of California. 3*8618d94aSMatthew Dillon * All rights reserved. 4*8618d94aSMatthew Dillon * 5*8618d94aSMatthew Dillon * This code is derived from software contributed to Berkeley by 6*8618d94aSMatthew Dillon * William Jolitz. 7*8618d94aSMatthew Dillon * 8*8618d94aSMatthew Dillon * Redistribution and use in source and binary forms, with or without 9*8618d94aSMatthew Dillon * modification, are permitted provided that the following conditions 10*8618d94aSMatthew Dillon * are met: 11*8618d94aSMatthew Dillon * 1. Redistributions of source code must retain the above copyright 12*8618d94aSMatthew Dillon * notice, this list of conditions and the following disclaimer. 13*8618d94aSMatthew Dillon * 2. Redistributions in binary form must reproduce the above copyright 14*8618d94aSMatthew Dillon * notice, this list of conditions and the following disclaimer in the 15*8618d94aSMatthew Dillon * documentation and/or other materials provided with the distribution. 16*8618d94aSMatthew Dillon * 3. Neither the name of the University nor the names of its contributors 17*8618d94aSMatthew Dillon * may be used to endorse or promote products derived from this software 18*8618d94aSMatthew Dillon * without specific prior written permission. 19*8618d94aSMatthew Dillon * 20*8618d94aSMatthew Dillon * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21*8618d94aSMatthew Dillon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22*8618d94aSMatthew Dillon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23*8618d94aSMatthew Dillon * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24*8618d94aSMatthew Dillon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25*8618d94aSMatthew Dillon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26*8618d94aSMatthew Dillon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27*8618d94aSMatthew Dillon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28*8618d94aSMatthew Dillon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29*8618d94aSMatthew Dillon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*8618d94aSMatthew Dillon * SUCH DAMAGE. 31*8618d94aSMatthew Dillon * 32*8618d94aSMatthew Dillon * @(#)sbrk.s 5.1 (Berkeley) 4/23/90 33*8618d94aSMatthew Dillon * $FreeBSD: src/lib/libc/amd64/sys/sbrk.S,v 1.15 2008/11/02 01:10:54 peter Exp $ 34*8618d94aSMatthew Dillon */ 35*8618d94aSMatthew Dillon 36*8618d94aSMatthew Dillon#include <machine/asm.h> 37*8618d94aSMatthew Dillon#include "SYS.h" 38*8618d94aSMatthew Dillon 39*8618d94aSMatthew Dillon .globl CNAME(_end) 40*8618d94aSMatthew Dillon .globl HIDENAME(minbrk) 41*8618d94aSMatthew Dillon .globl HIDENAME(curbrk) 42*8618d94aSMatthew Dillon 43*8618d94aSMatthew Dillon .data 44*8618d94aSMatthew DillonHIDENAME(minbrk): .quad CNAME(_end) 45*8618d94aSMatthew DillonHIDENAME(curbrk): .quad CNAME(_end) 46*8618d94aSMatthew Dillon .text 47*8618d94aSMatthew Dillon 48*8618d94aSMatthew DillonENTRY(fake_sbrk) 49*8618d94aSMatthew Dillon pushq %rdi 50*8618d94aSMatthew Dillon movq %rdi,%rcx 51*8618d94aSMatthew Dillon#ifdef PIC 52*8618d94aSMatthew Dillon movq PIC_GOT(HIDENAME(curbrk)),%rdx 53*8618d94aSMatthew Dillon movq (%rdx),%rax 54*8618d94aSMatthew Dillon#else 55*8618d94aSMatthew Dillon movq HIDENAME(curbrk)(%rip),%rax 56*8618d94aSMatthew Dillon#endif 57*8618d94aSMatthew Dillon testq %rcx,%rcx 58*8618d94aSMatthew Dillon jz back 59*8618d94aSMatthew Dillon addq %rax,%rdi 60*8618d94aSMatthew Dillon mov $SYS_break,%eax 61*8618d94aSMatthew Dillon KERNCALL 62*8618d94aSMatthew Dillon jb err 63*8618d94aSMatthew Dillon#ifdef PIC 64*8618d94aSMatthew Dillon movq PIC_GOT(HIDENAME(curbrk)),%rdx 65*8618d94aSMatthew Dillon movq (%rdx),%rax 66*8618d94aSMatthew Dillon#else 67*8618d94aSMatthew Dillon movq HIDENAME(curbrk)(%rip),%rax 68*8618d94aSMatthew Dillon#endif 69*8618d94aSMatthew Dillon movq 0(%rsp), %rcx 70*8618d94aSMatthew Dillon#ifdef PIC 71*8618d94aSMatthew Dillon addq %rcx,(%rdx) 72*8618d94aSMatthew Dillon#else 73*8618d94aSMatthew Dillon addq %rcx,HIDENAME(curbrk)(%rip) 74*8618d94aSMatthew Dillon#endif 75*8618d94aSMatthew Dillonback: 76*8618d94aSMatthew Dillon addq $8, %rsp 77*8618d94aSMatthew Dillon ret 78*8618d94aSMatthew Dillonerr: 79*8618d94aSMatthew Dillon addq $8, %rsp 80*8618d94aSMatthew Dillon#ifdef PIC 81*8618d94aSMatthew Dillon movq PIC_GOT(HIDENAME(cerror)),%rdx 82*8618d94aSMatthew Dillon jmp *%rdx 83*8618d94aSMatthew Dillon#else 84*8618d94aSMatthew Dillon jmp HIDENAME(cerror) 85*8618d94aSMatthew Dillon#endif 86*8618d94aSMatthew DillonEND(fake_sbrk) 87*8618d94aSMatthew Dillon 88*8618d94aSMatthew Dillon .section .note.GNU-stack,"",%progbits 89