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fa7dd9c5bc
skipping read-only pages, which can result in valuable non-text-related data not getting dumped, the ELF loader and the dynamic loader now mark read-only text pages NOCORE and the coredump code only checks (primarily) for complete inaccessibility of the page or NOCORE being set. Certain applications which map large amounts of read-only data will produce much larger cores. A new sysctl has been added, debug.elf_legacy_coredump, which will revert to the old behavior. This commit represents collaborative work by all parties involved. The PR contains a program demonstrating the problem. PR: kern/45994 Submitted by: "Peter Edwards" <pmedwards@eircom.net>, Archie Cobbs <archie@dellroad.org> Reviewed by: jdp, dillon MFC after: 7 days
135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm.h 8.2 (Berkeley) 12/13/93
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* @(#)vm_prot.h 8.1 (Berkeley) 6/11/93
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* @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Authors: Avadis Tevanian, Jr., Michael Wayne Young
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* $FreeBSD$
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*/
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#ifndef VM_H
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#define VM_H
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typedef char vm_inherit_t; /* inheritance codes */
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#define VM_INHERIT_SHARE ((vm_inherit_t) 0)
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#define VM_INHERIT_COPY ((vm_inherit_t) 1)
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#define VM_INHERIT_NONE ((vm_inherit_t) 2)
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#define VM_INHERIT_DEFAULT VM_INHERIT_COPY
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typedef u_char vm_prot_t; /* protection codes */
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#define VM_PROT_NONE ((vm_prot_t) 0x00)
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#define VM_PROT_READ ((vm_prot_t) 0x01)
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#define VM_PROT_WRITE ((vm_prot_t) 0x02)
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#define VM_PROT_EXECUTE ((vm_prot_t) 0x04)
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#define VM_PROT_OVERRIDE_WRITE ((vm_prot_t) 0x08) /* copy-on-write */
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#define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
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#define VM_PROT_RW (VM_PROT_READ|VM_PROT_WRITE)
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#define VM_PROT_DEFAULT VM_PROT_ALL
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union vm_map_object;
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typedef union vm_map_object vm_map_object_t;
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struct vm_map_entry;
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typedef struct vm_map_entry *vm_map_entry_t;
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struct vm_map;
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typedef struct vm_map *vm_map_t;
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struct vm_object;
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typedef struct vm_object *vm_object_t;
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#ifndef _KERNEL
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/*
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* This is defined in <sys/types.h> for the kernel so that non-vm kernel
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* sources (mainly Mach-derived ones such as ddb) don't have to include
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* vm stuff. Defining it there for applications might break things.
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* Define it here for "applications" that include vm headers (e.g.,
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* genassym).
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*/
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typedef int boolean_t;
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/*
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* This is defined in <sys/types.h> for the kernel so that vnode_if.h
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* doesn't have to include <vm/vm.h>.
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*/
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struct vm_page;
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typedef struct vm_page *vm_page_t;
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#endif /* _KERNEL */
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/*
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* Information passed from the machine-independant VM initialization code
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* for use by machine-dependant code (mainly for MMU support)
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*/
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struct kva_md_info {
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vm_offset_t buffer_sva;
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vm_offset_t buffer_eva;
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vm_offset_t clean_sva;
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vm_offset_t clean_eva;
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vm_offset_t pager_sva;
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vm_offset_t pager_eva;
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};
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extern struct kva_md_info kmi;
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extern void vm_ksubmap_init(struct kva_md_info *);
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#endif /* VM_H */
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