diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/clone.S | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/clone.S b/sysdeps/unix/sysv/linux/sparc/clone.S new file mode 100644 index 0000000000..875dcba64a --- /dev/null +++ b/sysdeps/unix/sysv/linux/sparc/clone.S @@ -0,0 +1,88 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. + Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx) + + FIXME: Currently only 6 parameters can be passsed + to the clone function. + + based on code written for the Intel 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., 675 Mass Ave, +Cambridge, MA 02139, 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 *child_stack, int flags, int nargs, ...) */ + + .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 + cmp %i3,0 + bl __clone_syscall_error + nop + + /* Flush the register windows */ + ta 3 + + /* Parameters for system call */ + mov %i1,%o1 + mov %i2,%o0 + + /* parameters that are on the stack for routine */ +#define P(x) 0x5c+(x*4) + ld [%fp+P(0)],%o2 + ld [%fp+P(1)],%o3 + ld [%fp+P(2)],%o4 + ld [%fp+P(3)],%o5 + /* Do the system call */ + 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: + mov %i5,%o1 + call %i0 + mov %i4,%o0 + call _exit,0 + nop |