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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/* Copyright (C) 2005-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <asm/sigcontext.h>
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#include <linux/signal.h>
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#include <asm-generic/ucontext.h>
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#include <sys/syscall.h>
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int
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_identify_sighandler (unsigned long fp, unsigned long pc,
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unsigned long *pprev_fp, unsigned long *pprev_pc,
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unsigned long *retaddr)
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{
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unsigned long *tramp = 0;
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struct ucontext *uc;
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if (*retaddr == 0)
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{
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/* Kernel inserts the tramp between the signal handler frame and the
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caller frame in signal handling. */
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tramp = (unsigned long *) pc;
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tramp += 2;
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if ((*tramp == (0x31800000 | __NR_rt_sigreturn))
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&& (*(tramp+1) == 0xb9cc0008))
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{
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/* Signal handler function argument are:
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int sig_num, siginfo_t * info, void * ucontext
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therefore ucontext is the 3rd argument. */
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unsigned long ucptr = ((unsigned long) tramp
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- sizeof (struct ucontext));
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uc = (struct ucontext *) ucptr;
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*pprev_pc = uc->uc_mcontext.regs.pc;
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/* Need to record the return address since the return address of the
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function which causes this signal may not be recorded in the
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stack. */
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*pprev_fp = uc->uc_mcontext.regs.r1;
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*retaddr = uc->uc_mcontext.regs.r15;
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/* It is a signal handler. */
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return 1;
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}
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}
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return 0;
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}
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