diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc32/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc32/clone.S | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S b/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S new file mode 100644 index 0000000000..64735e9dbc --- /dev/null +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S @@ -0,0 +1,70 @@ +/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Contributed by Richard Henderson (rth@tamu.edu). + + The GNU C Library 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. + + The GNU C Library 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 the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* clone() is even more special than fork() as it mucks with stacks + and invokes a function in the right context after its all over. */ + +#include <asm/errno.h> +#include <asm/unistd.h> + +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ + + .text + .align 4 + .globl __libc_clone + .type __libc_clone,@function + .weak clone + __clone = __libc_clone + clone = __libc_clone + +__libc_clone: + save %sp,-96,%sp + + /* sanity check arguments */ + tst %i0 + be __clone_syscall_error + tst %i1 + be __clone_syscall_error + nop + + /* Do the system call */ + mov %i1,%o1 + mov %i2,%o0 + set __NR_clone,%g1 + ta 0x10 + bcs __clone_syscall_error + tst %o1 + bne __thread_start + nop + mov %o0,%i0 + ret + restore + +__clone_syscall_error: + call __errno_location + set EINVAL,%i0 + st %i0,[%o0] + mov -1,%i0 + ret + restore + +__thread_start: + call %i0 + mov %i3,%o0 + call _exit,0 + nop |