OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [uclinux/] [uC-libc/] [sysdeps/] [_clone.S] - Blame information for rev 523

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 199 simons 
/* Adapted from glibc */
2 
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. */
3 
 
4 
/* clone is even more special than fork as it mucks with stacks
5 
   and invokes a function in the right context after its all over.  */
6 
 
7 
#include
8 
#include
9 
 
10 
/* int _clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
11 
 
12 
        .text
13 
ENTRY (_clone)
14 
 
15 
        /* Sanity check arguments.  */
16 
        l.addi  r11,r0,-EINVAL
17 
        l.sfeqi r3,0
18 
        l.bf    syscall_error
19 
        l.nop
20 
        l.sfeqi r4,0
21 
        l.bf    syscall_error
22 
        l.nop
23 
 
24 
        /* Do the system call */
25 
        l.addi  r7,r3,0                 /* save r3 (fn) */
26 
        l.addi  r3,r5,0
27 
        l.addi  r11,r0,__NR_clone
28 
        l.sys   1
29 
        l.nop
30 
        l.sfeqi r11,0
31 
        l.bf    thread_start
32 
        l.nop
33 523 simons 
        l.jr    r9
34 199 simons 
        l.nop
35 
 
36 
syscall_error:
37 523 simons 
        l.jr    r9
38 199 simons 
        l.nop
39 
 
40 
thread_start:
41 
        l.addi  r3,r6,0
42 
        l.jalr  r7
43 
        l.nop
44 
        l.addi  r3,r11,0
45 
        l.addi  r11,r0,__NR_exit
46 
        l.sys   1
47 
        l.nop
48 
 

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.