| 1 | /* OpenRISC helper for the clone syscall. |
|---|
| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
|---|
| 3 | This file is part of the GNU C Library. |
|---|
| 4 | |
|---|
| 5 | The GNU C Library is free software; you can redistribute it and/or |
|---|
| 6 | modify it under the terms of the GNU Lesser General Public |
|---|
| 7 | License as published by the Free Software Foundation; either |
|---|
| 8 | version 2.1 of the License, or (at your option) any later version. |
|---|
| 9 | |
|---|
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 13 | Lesser General Public License for more details. |
|---|
| 14 | |
|---|
| 15 | You should have received a copy of the GNU Lesser General Public |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #include <stdarg.h> |
|---|
| 20 | #include <sysdep.h> |
|---|
| 21 | |
|---|
| 22 | extern int __or1k_clone (int (*fn)(void *), void *child_stack, |
|---|
| 23 | int flags, void *arg, pid_t *ptid, |
|---|
| 24 | void *tls, pid_t *ctid); |
|---|
| 25 | |
|---|
| 26 | |
|---|
| 27 | /* The OpenRISC ABI uses the stack for varargs like those using in clone |
|---|
| 28 | but the linux syscall ABI uses registers. |
|---|
| 29 | This function moves from varargs to regs. */ |
|---|
| 30 | int |
|---|
| 31 | __clone (int (*fn)(void *), void *child_stack, |
|---|
| 32 | int flags, void *arg, ... |
|---|
| 33 | /* pid_t *ptid, struct user_desc *tls, pid_t *ctid */ ) |
|---|
| 34 | { |
|---|
| 35 | void *ptid; |
|---|
| 36 | void *tls; |
|---|
| 37 | void *ctid; |
|---|
| 38 | va_list ap; |
|---|
| 39 | int err; |
|---|
| 40 | |
|---|
| 41 | va_start (ap, arg); |
|---|
| 42 | ptid = va_arg (ap, void *); |
|---|
| 43 | tls = va_arg (ap, void *); |
|---|
| 44 | ctid = va_arg (ap, void *); |
|---|
| 45 | va_end (ap); |
|---|
| 46 | |
|---|
| 47 | /* Sanity check the arguments */ |
|---|
| 48 | err = -EINVAL; |
|---|
| 49 | if (!fn) |
|---|
| 50 | goto syscall_error; |
|---|
| 51 | if (!child_stack) |
|---|
| 52 | goto syscall_error; |
|---|
| 53 | |
|---|
| 54 | return __or1k_clone (fn, child_stack, flags, arg, ptid, tls, ctid); |
|---|
| 55 | |
|---|
| 56 | syscall_error: |
|---|
| 57 | __set_errno (-err); |
|---|
| 58 | return -1; |
|---|
| 59 | } |
|---|
| 60 | libc_hidden_def (__clone) |
|---|
| 61 | weak_alias (__clone, clone) |
|---|
| 62 | |
|---|
