diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S new file mode 100644 index 0000000000..6d2f5bd55f --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S @@ -0,0 +1,90 @@ +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* 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> +#include <tcb-offsets.h> +#include <sysdep.h> + +#define CLONE_VM 0x00000100 + +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, + pid_t *ptid, void *tls, pid_t *ctid); */ + + .text +ENTRY (__clone) + save %sp,-96,%sp + cfi_def_cfa_register(%fp) + cfi_window_save + cfi_register(%o7, %i7) + + /* sanity check arguments */ + orcc %i0,%g0,%g2 + be .Leinval + orcc %i1,%g0,%o1 + be .Leinval + mov %i2,%o0 + + /* The child_stack is the top of the stack, allocate one + whole stack frame from that as this is what the kernel + expects. */ + sub %o1, 96, %o1 + mov %i3, %g3 + + /* ptid */ + mov %i4,%o2 + /* tls */ + mov %i5,%o3 + /* ctid */ + ld [%fp+92],%o4 + + /* Do the system call */ + set __NR_clone,%g1 + ta 0x10 + bcs .Lerror + tst %o1 + bne __thread_start + nop + jmpl %i7 + 8, %g0 + restore %o0,%g0,%o0 + +.Leinval: + mov EINVAL, %o0 +.Lerror: + call HIDDEN_JUMPTARGET(__errno_location) + mov %o0, %i0 + st %i0,[%o0] + jmpl %i7 + 8, %g0 + restore %g0,-1,%o0 +END(__clone) + + .type __thread_start,@function +__thread_start: + mov %g0, %fp /* terminate backtrace */ + call %g2 + mov %g3,%o0 + call HIDDEN_JUMPTARGET(_exit),0 + nop + + .size __thread_start, .-__thread_start + +libc_hidden_def (__clone) +weak_alias (__clone, clone) |