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 1.2 1995/01/23 01:29:39 davidg Exp $ |
37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text |
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 |
46 .globl HIDENAME(curbrk) 47 .globl HIDENAME(minbrk) |
48ENTRY(_brk) 49 jmp ok 50 51ENTRY(brk) 52#ifdef PIC 53 movl 4(%esp),%eax 54 PIC_PROLOGUE |
55 movl PIC_GOT(HIDENAME(curbrk)),%edx # set up GOT addressing 56 movl PIC_GOT(HIDENAME(minbrk)),%ecx # |
57 cmpl %eax,(%ecx) 58 PIC_EPILOGUE 59 jl ok 60 movl (%ecx),%eax 61 movl %eax,4(%esp) 62ok: |
63 lea SYS_break,%eax 64 KERNCALL |
65 jb err 66 movl 4(%esp),%eax 67 movl %eax,(%edx) 68 movl $0,%eax 69 ret 70err: |
71 PIC_PROLOGUE 72 jmp PIC_PLT(HIDENAME(cerror)) |
73 74#else 75 76 movl 4(%esp),%eax |
77 cmpl %eax,HIDENAME(minbrk) |
78 jl ok |
79 movl HIDENAME(minbrk),%eax |
80 movl %eax,4(%esp) 81ok: |
82 lea SYS_break,%eax 83 KERNCALL |
84 jb err 85 movl 4(%esp),%eax |
86 movl %eax,HIDENAME(curbrk) |
87 movl $0,%eax 88 ret 89err: |
90 jmp HIDENAME(cerror) |
91#endif |