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or1k: Linux Syscall Interface

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Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Stafford Horne
2021-10-20 06:51:52 +09:00
parent 9a47b9660b
commit 1871c95f2b
6 changed files with 738 additions and 0 deletions
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61
sysdeps/unix/sysv/linux/or1k/clone.c Normal file
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/* OpenRISC helper for the clone syscall.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <sysdep.h>
extern int __or1k_clone (int (*fn)(void *), void *child_stack,
int flags, void *arg, pid_t *ptid,
void *tls, pid_t *ctid);
/* The OpenRISC ABI uses the stack for varargs like those using in clone
but the linux syscall ABI uses registers.
This function moves from varargs to regs. */
int
__clone (int (*fn)(void *), void *child_stack,
int flags, void *arg, ...
/* pid_t *ptid, struct user_desc *tls, pid_t *ctid */ )
{
void *ptid;
void *tls;
void *ctid;
va_list ap;
int err;
va_start (ap, arg);
ptid = va_arg (ap, void *);
tls = va_arg (ap, void *);
ctid = va_arg (ap, void *);
va_end (ap);
/* Sanity check the arguments */
err = -EINVAL;
if (!fn)
goto syscall_error;
if (!child_stack)
goto syscall_error;
return __or1k_clone (fn, child_stack, flags, arg, ptid, tls, ctid);
syscall_error:
__set_errno (-err);
return -1;
}
libc_hidden_def (__clone)
weak_alias (__clone, clone)