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[/] [or1k/] [trunk/] [uclinux/] [uC-libc/] [sysdeps/] [_clone.S] - Blame information for rev 199

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Line No. Rev Author Line
1 199 simons 
/* Adapted from glibc */
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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. */
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/* clone is even more special than fork as it mucks with stacks
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   and invokes a function in the right context after its all over.  */
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#include
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#include
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/* int _clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
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        .text
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ENTRY (_clone)
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        /* Sanity check arguments.  */
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        l.addi  r11,r0,-EINVAL
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        l.sfeqi r3,0
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        l.bf    syscall_error
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        l.nop
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        l.sfeqi r4,0
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        l.bf    syscall_error
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        l.nop
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        /* Do the system call */
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        l.addi  r7,r3,0                 /* save r3 (fn) */
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        l.addi  r3,r5,0
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        l.addi  r11,r0,__NR_clone
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        l.sys   1
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        l.nop
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        l.sfeqi r11,0
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        l.bf    thread_start
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        l.nop
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        l.jalr  r9
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        l.nop
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syscall_error:
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        l.jalr  r9
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        l.nop
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thread_start:
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        l.addi  r3,r6,0
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        l.jalr  r7
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        l.nop
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        l.addi  r3,r11,0
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        l.addi  r11,r0,__NR_exit
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        l.sys   1
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        l.nop
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