glibc/sysdeps/unix/sysv/linux/startup.h
Florian Weimer a2a6bce7d7 Linux: Implement a useful version of _startup_fatal
On i386 and ia64, the TCB is not available at this point.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-05-09 18:15:16 +02:00

40 lines
1.9 KiB
C

/* Linux definitions of functions used by static libc main startup.
Copyright (C) 2017-2022 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/>. */
#ifdef SHARED
# include_next <startup.h>
#else
# include <sysdep.h>
/* Avoid a run-time invocation of strlen. */
#define _startup_fatal(message) \
do \
{ \
size_t __message_length = __builtin_strlen (message); \
if (! __builtin_constant_p (__message_length)) \
{ \
extern void _startup_fatal_not_constant (void); \
_startup_fatal_not_constant (); \
} \
INTERNAL_SYSCALL_CALL (write, STDERR_FILENO, (message), \
__message_length); \
INTERNAL_SYSCALL_CALL (exit_group, 127); \
} \
while (0)
#endif /* !SHARED */