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aa0e46636a
This patch continues the process of fixing coding style to break lines before not after operators in accordance with the GNU Coding Standards, fixing such issues in a non-exhaustive selection of sysdeps files that had them. Tested for x86_64, and with build-many-glibcs.py. * sysdeps/arm/sysdep.h (#if condition): Break lines before rather than after operators. * sysdeps/mach/hurd/fork.c (__fork): Likewise. * sysdeps/mach/hurd/getcwd.c (__hurd_canonicalize_directory_name_internal): Likewise. * sysdeps/mach/hurd/htl/pt-mutex-consistent.c (pthread_mutex_consistent): Likewise. * sysdeps/mach/hurd/htl/pt-mutex-init.c (_pthread_mutex_init): Likewise. * sysdeps/mach/hurd/htl/pt-mutex-transfer-np.c (__pthread_mutex_transfer_np): Likewise. * sysdeps/mach/hurd/htl/pt-mutex-unlock.c (__pthread_mutex_unlock): Likewise. * sysdeps/mach/hurd/htl/pt-mutex.h (ROBUST_LOCK): Likewise. (mtx_owned_p): Likewise. * sysdeps/mach/hurd/htl/pt-mutexattr-getrobust.c (pthread_mutexattr_getrobust): Likewise. * sysdeps/mach/hurd/i386/init-first.c (init1): Likewise. * sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler): Likewise. * sysdeps/mach/hurd/ioctl.c (__ioctl): Likewise. * sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Likewise. * sysdeps/mach/hurd/kill.c (__kill): Likewise. * sysdeps/mach/hurd/mig-reply.c (__mig_get_reply_port): Likewise. * sysdeps/mach/hurd/ptrace.c (ptrace): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/unix/sysv/linux/aarch64/sysdep.h (#if condition): Likewise. * sysdeps/unix/sysv/linux/alpha/ioperm.c (process_cpuinfo): Likewise. * sysdeps/unix/sysv/linux/bits/timex.h (STA_RONLY): Likewise. * sysdeps/unix/sysv/linux/csky/sysdep.h (#if condition): Likewise. * sysdeps/unix/sysv/linux/generic/____longjmp_chk.c (____longjmp_chk): Likewise. * sysdeps/unix/sysv/linux/generic/futimesat.c (futimesat): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (INTERNAL_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h (INTERNAL_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c (__get_clockfreq_via_cpuinfo): Likewise.
58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <jmpbuf-offsets.h>
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#include <sysdep.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stackinfo.h>
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#ifdef _STACK_GROWS_DOWN
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#define called_from(this, saved) ((this) < (saved))
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#else
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#define called_from(this, saved) ((this) > (saved))
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#endif
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extern void ____longjmp_chk (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__));
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void ____longjmp_chk (__jmp_buf env, int val)
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{
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void *this_frame = __builtin_frame_address (0);
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void *saved_frame = JB_FRAME_ADDRESS (env);
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INTERNAL_SYSCALL_DECL (err);
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stack_t ss;
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/* If "env" is from a frame that called us, we're all set. */
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if (called_from(this_frame, saved_frame))
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__longjmp (env, val);
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/* If we can't get the current stack state, give up and do the longjmp. */
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if (INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &ss) != 0)
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__longjmp (env, val);
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/* If we we are executing on the alternate stack and within the
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bounds, do the longjmp. */
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if (ss.ss_flags == SS_ONSTACK
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&& (this_frame >= ss.ss_sp && this_frame < (ss.ss_sp + ss.ss_size)))
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__longjmp (env, val);
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__fortify_fail ("longjmp causes uninitialized stack frame");
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}
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