| brk.S (5790) | brk.S (15634) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 19 unchanged lines hidden (view full) --- 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * | 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 19 unchanged lines hidden (view full) --- 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * |
| 36 * $Id: brk.S,v 1.1 1994/08/05 01:18:39 wollman Exp $ | 36 * $Id: brk.S,v 1.2 1995/01/23 01:29:39 davidg Exp $ |
| 37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text | 37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text |
| 41 .asciz "$Id$" | 41 .asciz "$Id: brk.S,v 1.2 1995/01/23 01:29:39 davidg Exp $" |
| 42#endif /* SYSLIBC_RCS and not lint */ 43 44#include "SYS.h" 45 | 42#endif /* SYSLIBC_RCS and not lint */ 43 44#include "SYS.h" 45 |
| 46#define SYS_brk 17 47 48 .globl curbrk 49 .globl minbrk | 46 .globl HIDENAME(curbrk) 47 .globl HIDENAME(minbrk) |
| 50ENTRY(_brk) 51 jmp ok 52 53ENTRY(brk) 54#ifdef PIC 55 movl 4(%esp),%eax 56 PIC_PROLOGUE | 48ENTRY(_brk) 49 jmp ok 50 51ENTRY(brk) 52#ifdef PIC 53 movl 4(%esp),%eax 54 PIC_PROLOGUE |
| 57 movl PIC_GOT(curbrk),%edx # set up GOT addressing 58 movl PIC_GOT(minbrk),%ecx # | 55 movl PIC_GOT(HIDENAME(curbrk)),%edx # set up GOT addressing 56 movl PIC_GOT(HIDENAME(minbrk)),%ecx # |
| 59 cmpl %eax,(%ecx) 60 PIC_EPILOGUE 61 jl ok 62 movl (%ecx),%eax 63 movl %eax,4(%esp) 64ok: | 57 cmpl %eax,(%ecx) 58 PIC_EPILOGUE 59 jl ok 60 movl (%ecx),%eax 61 movl %eax,4(%esp) 62ok: |
| 65 lea SYS_brk,%eax 66 LCALL(7,0) | 63 lea SYS_break,%eax 64 KERNCALL |
| 67 jb err 68 movl 4(%esp),%eax 69 movl %eax,(%edx) 70 movl $0,%eax 71 ret 72err: | 65 jb err 66 movl 4(%esp),%eax 67 movl %eax,(%edx) 68 movl $0,%eax 69 ret 70err: |
| 73 jmp PIC_PLT(cerror) | 71 PIC_PROLOGUE 72 jmp PIC_PLT(HIDENAME(cerror)) |
| 74 75#else 76 77 movl 4(%esp),%eax | 73 74#else 75 76 movl 4(%esp),%eax |
| 78 cmpl %eax,minbrk | 77 cmpl %eax,HIDENAME(minbrk) |
| 79 jl ok | 78 jl ok |
| 80 movl minbrk,%eax | 79 movl HIDENAME(minbrk),%eax |
| 81 movl %eax,4(%esp) 82ok: | 80 movl %eax,4(%esp) 81ok: |
| 83 lea SYS_brk,%eax 84 LCALL(7,0) | 82 lea SYS_break,%eax 83 KERNCALL |
| 85 jb err 86 movl 4(%esp),%eax | 84 jb err 85 movl 4(%esp),%eax |
| 87 movl %eax,curbrk | 86 movl %eax,HIDENAME(curbrk) |
| 88 movl $0,%eax 89 ret 90err: | 87 movl $0,%eax 88 ret 89err: |
| 91 jmp cerror | 90 jmp HIDENAME(cerror) |
| 92#endif | 91#endif |