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40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* __libc_siglongjmp for Linux/x86
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Copyright (C) 2018-2024 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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#include <sysdeps/x86/longjmp.c>
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#include <pthreadP.h>
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#include <jmp_buf-ssp.h>
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#ifdef __x86_64__
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# define SHADOW_STACK_POINTER_SIZE 8
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#else
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# define SHADOW_STACK_POINTER_SIZE 4
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#endif
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/* Assert that the priv field in struct pthread_unwind_buf has space
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to store shadow stack pointer. */
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_Static_assert ((offsetof (struct pthread_unwind_buf, priv)
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<= SHADOW_STACK_POINTER_OFFSET)
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&& ((offsetof (struct pthread_unwind_buf, priv)
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+ sizeof (((struct pthread_unwind_buf *) 0)->priv))
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>= (SHADOW_STACK_POINTER_OFFSET
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+ SHADOW_STACK_POINTER_SIZE)),
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"Shadow stack pointer is not within private storage "
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"of pthread_unwind_buf.");
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