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Diffstat (limited to 'src/grep/lib/stackvma.h')
| -rw-r--r-- | src/grep/lib/stackvma.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/grep/lib/stackvma.h b/src/grep/lib/stackvma.h new file mode 100644 index 0000000..1f214a4 --- /dev/null +++ b/src/grep/lib/stackvma.h @@ -0,0 +1,62 @@ +/* Determine the virtual memory area of a given address. + Copyright (C) 2002-2021 Free Software Foundation, Inc. + Copyright (C) 2003-2006 Paolo Bonzini <bonzini@gnu.org> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible and Paolo Bonzini. */ + +#ifndef _STACKVMA_H +#define _STACKVMA_H + +#include <stdint.h> + +/* Describes a virtual memory area, with some info about the gap between + it and the next or previous virtual memory area. */ +struct vma_struct +{ + uintptr_t start; + uintptr_t end; +#if STACK_DIRECTION < 0 + /* Info about the gap between this VMA and the previous one. + addr must be < vma->start. */ + int (*is_near_this) (uintptr_t addr, struct vma_struct *vma); + /* Private field, not provided by all sigsegv_get_vma implementations. */ + uintptr_t prev_end; +#endif +#if STACK_DIRECTION > 0 + /* Info about the gap between this VMA and the next one. + addr must be > vma->end - 1. */ + int (*is_near_this) (uintptr_t addr, struct vma_struct *vma); + /* Private field, not provided by all sigsegv_get_vma implementations. */ + uintptr_t next_start; +#endif +}; + +/* Determines the virtual memory area to which a given address belongs, + and returns 0. Returns -1 if it cannot be determined. + This function is used to determine the stack extent when a fault occurs. */ +extern int sigsegv_get_vma (uintptr_t address, struct vma_struct *vma); + +/* Defined if sigsegv_get_vma actually works (i.e. does not always fail). */ +#if defined __linux__ || defined __ANDROID__ \ + || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ \ + || defined __NetBSD__ || defined __OpenBSD__ \ + || (defined __APPLE__ && defined __MACH__) \ + || defined _AIX || defined __sgi || defined __sun \ + || defined __CYGWIN__ || defined __HAIKU__ +# define HAVE_STACKVMA 1 +#endif + +#endif /* _STACKVMA_H */ |