diff options
| author | Eric Andersen <andersen@codepoet.org> | 2002-06-18 01:10:28 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2002-06-18 01:10:28 +0000 |
| commit | b34e006872e0c6c6f851ca36eda46d01e3ca0e6b (patch) | |
| tree | 8206ca5739109e6482643cbea01975601c39b3b0 /libc/sysdeps/linux/i960/clone.S | |
| parent | 33a9fd74f98749da869c8d649f0a148768205867 (diff) | |
Patch from Martin Proulx <mproulx@okiok.com> to support
the i960 architecture.
Diffstat (limited to 'libc/sysdeps/linux/i960/clone.S')
| -rw-r--r-- | libc/sysdeps/linux/i960/clone.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i960/clone.S b/libc/sysdeps/linux/i960/clone.S new file mode 100644 index 000000000..e6d504bb7 --- /dev/null +++ b/libc/sysdeps/linux/i960/clone.S @@ -0,0 +1,62 @@ +# +# clone.S, part of the i960 support for the uClibc library. +# +# Copyright (C) 2002 by Okiok Data Ltd. http://www.okiok.com/ +# +# This program is free software; you can redistribute it and/or modify it under +# the terms of the GNU Library General Public License as published by the Free +# Software Foundation; either version 2 of the License, or (at your option) any +# later version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more +# details. +# +# You should have received a copy of the GNU Library General Public License +# along with this program; if not, write to the Free Software Foundation, Inc., +# at 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# Derived from an old port of uC-libc to the i960 by Keith Adams (kma@cse.ogi.edu). +# + +#include <sys/syscall.h> +#include <bits/errno.h> + +/* clone is even more special than fork as it mucks with stacks + and invokes a function in the right context after its all over. */ + +/* int _clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ + + .globl __clone +__clone: + /* set up new stack image in regs r4-r7; argument will be in r3 in child. */ + ldconst 0, r4 /* pfp == 0 */ + addo 16, g1, r5 /* sp == newfp + 16 */ + mov g0, r6 /* rip == fnc */ + mov g2, r7 + stq r4, (g1) + + addo sp, 4, sp + st g10, -4(sp) + mov sp, g10 + ldconst __NR_clone, g13 + calls 0 + + /* Do the system call */ + cmpibg 0, g0, syscall_error /* if < 0, error */ + be thread_start /* if == 0, we're the child */ + ret /* we're the parent */ + +syscall_error: + not g0, r3 + callx ___errno_location + st r3, (g0) + ret + +thread_start: + # our new pfp is in g1; here we go + flushreg + mov g1, pfp + flushreg + ret |