| sbrk.S (11183) | sbrk.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: sbrk.S,v 1.2 1995/01/23 01:30:04 davidg Exp $ | 36 * $Id: sbrk.S,v 1.3 1995/10/04 15:58:57 phk 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: sbrk.S,v 1.2 1995/01/23 01:30:04 davidg Exp $" | 41 .asciz "$Id: sbrk.S,v 1.3 1995/10/04 15:58:57 phk 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 | 46 .globl CNAME(end) 47 .globl HIDENAME(minbrk) 48 .globl HIDENAME(curbrk) |
| 47 | 49 |
| 48 .globl _end 49 .globl minbrk 50 .globl curbrk 51 | |
| 52 .data | 50 .data |
| 53minbrk: .long _end 54curbrk: .long _end | 51HIDENAME(minbrk): .long CNAME(end) 52HIDENAME(curbrk): .long CNAME(end) |
| 55 .text 56 57ENTRY(sbrk) 58#ifdef PIC 59 movl 4(%esp),%ecx 60 PIC_PROLOGUE | 53 .text 54 55ENTRY(sbrk) 56#ifdef PIC 57 movl 4(%esp),%ecx 58 PIC_PROLOGUE |
| 61 movl PIC_GOT(curbrk),%edx | 59 movl PIC_GOT(HIDENAME(curbrk)),%edx |
| 62 movl (%edx),%eax 63 PIC_EPILOGUE 64 testl %ecx,%ecx 65 jz back 66 addl %eax,4(%esp) | 60 movl (%edx),%eax 61 PIC_EPILOGUE 62 testl %ecx,%ecx 63 jz back 64 addl %eax,4(%esp) |
| 67 lea SYS_brk,%eax 68 LCALL(7,0) | 65 lea SYS_break,%eax 66 KERNCALL |
| 69 jb err 70 PIC_PROLOGUE | 67 jb err 68 PIC_PROLOGUE |
| 71 movl PIC_GOT(curbrk),%edx | 69 movl PIC_GOT(HIDENAME(curbrk)),%edx |
| 72 movl (%edx),%eax 73 addl %ecx,(%edx) 74 PIC_EPILOGUE 75back: 76 ret 77err: | 70 movl (%edx),%eax 71 addl %ecx,(%edx) 72 PIC_EPILOGUE 73back: 74 ret 75err: |
| 78 jmp PIC_PLT(cerror) | 76 PIC_PROLOGUE 77 jmp PIC_PLT(HIDENAME(cerror)) |
| 79 80#else /* !PIC */ 81 82 movl 4(%esp),%ecx | 78 79#else /* !PIC */ 80 81 movl 4(%esp),%ecx |
| 83 movl curbrk,%eax | 82 movl HIDENAME(curbrk),%eax |
| 84 testl %ecx,%ecx 85 jz back 86 addl %eax,4(%esp) | 83 testl %ecx,%ecx 84 jz back 85 addl %eax,4(%esp) |
| 87 lea SYS_brk,%eax 88 LCALL(7,0) | 86 lea SYS_break,%eax 87 KERNCALL |
| 89 jb err | 88 jb err |
| 90 movl curbrk,%eax 91 addl %ecx,curbrk | 89 movl HIDENAME(curbrk),%eax 90 addl %ecx,HIDENAME(curbrk) |
| 92back: 93 ret 94err: | 91back: 92 ret 93err: |
| 95 jmp cerror | 94 jmp HIDENAME(cerror) |
| 96#endif /* PIC */ | 95#endif /* PIC */ |