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46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* __libc_siglongjmp for x86.
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Copyright (C) 2018-2023 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
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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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<https://www.gnu.org/licenses/>. */
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#define __libc_longjmp __redirect___libc_longjmp
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#include <setjmp/longjmp.c>
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#undef __libc_longjmp
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extern void __longjmp_cancel (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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/* Since __libc_longjmp is a private interface for cancellation
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implementation in libpthread, there is no need to restore shadow
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stack register. */
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void
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__libc_longjmp (sigjmp_buf env, int val)
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{
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/* Perform any cleanups needed by the frames being unwound. */
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_longjmp_unwind (env, val);
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if (env[0].__mask_was_saved)
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/* Restore the saved signal mask. */
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(void) __sigprocmask (SIG_SETMASK,
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(sigset_t *) &env[0].__saved_mask,
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(sigset_t *) NULL);
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/* Call the machine-dependent function to restore machine state
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without shadow stack. */
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__longjmp_cancel (env[0].__jmpbuf, val ?: 1);
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}
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