mirror of git://sourceware.org/git/glibc.git
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Restartable Sequences internal API. Linux implementation.
|
|
Copyright (C) 2020 Free Software Foundation, Inc.
|
|
|
|
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/>. */
|
|
|
|
#ifndef RSEQ_INTERNAL_H
|
|
#define RSEQ_INTERNAL_H
|
|
|
|
#include <sysdep.h>
|
|
#include <errno.h>
|
|
#include <kernel-features.h>
|
|
#include <stdio.h>
|
|
#include <sys/rseq.h>
|
|
|
|
#ifdef RSEQ_SIG
|
|
static inline void
|
|
rseq_register_current_thread (void)
|
|
{
|
|
int ret;
|
|
|
|
if (__rseq_abi.cpu_id != RSEQ_CPU_ID_UNINITIALIZED)
|
|
__libc_fatal ("glibc fatal error: "
|
|
"rseq already initialized for this thread\n");
|
|
ret = INTERNAL_SYSCALL_CALL (rseq, &__rseq_abi, sizeof (struct rseq),
|
|
0, RSEQ_SIG);
|
|
if (INTERNAL_SYSCALL_ERROR_P (ret))
|
|
{
|
|
const char *msg = NULL;
|
|
|
|
switch (INTERNAL_SYSCALL_ERRNO (ret))
|
|
{
|
|
case ENOSYS: /* rseq system call not implemented. */
|
|
case EPERM: /* rseq system call filtered by seccomp. */
|
|
case EACCES: /* rseq system call filtered by seccomp. */
|
|
__rseq_abi.cpu_id = RSEQ_CPU_ID_REGISTRATION_FAILED;
|
|
break;
|
|
case EBUSY:
|
|
msg = "glibc fatal error: rseq already registered for this thread\n";
|
|
break;
|
|
case EFAULT:
|
|
msg = "glibc fatal error: rseq parameter is an invalid address\n";
|
|
break;
|
|
case EINVAL:
|
|
msg = "glibc fatal error: rseq parameters are invalid\n";
|
|
break;
|
|
default:
|
|
msg = "glibc fatal error: unexpected rseq errno\n";
|
|
break;
|
|
}
|
|
if (msg != NULL)
|
|
__libc_fatal (msg);
|
|
}
|
|
}
|
|
#else /* RSEQ_SIG */
|
|
static inline void
|
|
rseq_register_current_thread (void)
|
|
{
|
|
}
|
|
#endif /* RSEQ_SIG */
|
|
|
|
#endif /* rseq-internal.h */
|