| sbrk.S (114313) | sbrk.S (115279) |
|---|---|
| 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 --- 24 unchanged lines hidden (view full) --- 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#if defined(SYSLIBC_SCCS) && !defined(lint) 38 .asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90" 39#endif /* SYSLIBC_SCCS and not lint */ 40#include <machine/asm.h> | 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 --- 24 unchanged lines hidden (view full) --- 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#if defined(SYSLIBC_SCCS) && !defined(lint) 38 .asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90" 39#endif /* SYSLIBC_SCCS and not lint */ 40#include <machine/asm.h> |
| 41__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/sbrk.S 114313 2003-04-30 18:16:33Z peter $"); | 41__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/sbrk.S 115279 2003-05-24 17:35:23Z peter $"); |
| 42 43#include "SYS.h" 44 45 .globl CNAME(_end) 46 .globl HIDENAME(minbrk) 47 .globl HIDENAME(curbrk) 48 49 .data 50HIDENAME(minbrk): .quad CNAME(_end) 51HIDENAME(curbrk): .quad CNAME(_end) 52 .text 53 54ENTRY(sbrk) 55 pushq %rdi 56 movq %rdi,%rcx | 42 43#include "SYS.h" 44 45 .globl CNAME(_end) 46 .globl HIDENAME(minbrk) 47 .globl HIDENAME(curbrk) 48 49 .data 50HIDENAME(minbrk): .quad CNAME(_end) 51HIDENAME(curbrk): .quad CNAME(_end) 52 .text 53 54ENTRY(sbrk) 55 pushq %rdi 56 movq %rdi,%rcx |
| 57 movq PIC_GOT(HIDENAME(curbrk)),%rax | 57#ifdef PIC 58 movq PIC_GOT(HIDENAME(curbrk)),%rdx 59 movq (%rdx),%rax 60#else 61 movq HIDENAME(curbrk)(%rip),%rax 62#endif |
| 58 testq %rcx,%rcx 59 jz back 60 addq %rax,%rdi 61 mov $SYS_break,%eax 62 KERNCALL 63 jb err | 63 testq %rcx,%rcx 64 jz back 65 addq %rax,%rdi 66 mov $SYS_break,%eax 67 KERNCALL 68 jb err |
| 64 movq PIC_GOT(HIDENAME(curbrk)),%rax | 69#ifdef PIC 70 movq PIC_GOT(HIDENAME(curbrk)),%rdx 71 movq (%rdx),%rax 72#else 73 movq HIDENAME(curbrk)(%rip),%rax 74#endif |
| 65 movq 0(%rsp), %rcx | 75 movq 0(%rsp), %rcx |
| 66 addq %rcx,PIC_GOT(HIDENAME(curbrk)) | 76#ifdef PIC 77 addq %rcx,(%rdx) 78#else 79 addq %rcx,HIDENAME(curbrk)(%rip) 80#endif |
| 67back: 68 addq $8, %rsp 69 ret 70err: 71 addq $8, %rsp | 81back: 82 addq $8, %rsp 83 ret 84err: 85 addq $8, %rsp |
| 72 jmp PIC_PLT(HIDENAME(cerror)) | 86#ifdef PIC 87 movq PIC_GOT(HIDENAME(cerror)),%rdx 88 jmp *%rdx 89#else 90 jmp HIDENAME(cerror) 91#endif |