38cf2a4334
This change adds a new libkvm function, kvm_kerndisp(), that can be used to retrieve the kernel displacement, that is the difference between the kernel's base virtual address at run time and the kernel base virtual address specified in the kernel image file. This will be used by kgdb, to properly relocate kernel symbols, when needed. Reviewed by: jhb Differential Revision: https://reviews.freebsd.org/D23285
134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 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. 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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* @(#)kvm.h 8.1 (Berkeley) 6/2/93
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* $FreeBSD$
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*/
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#ifndef _KVM_H_
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#define _KVM_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <nlist.h>
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/*
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* Including vm/vm.h causes namespace pollution issues. For the
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* most part, only things using kvm_walk_pages() need to #include it.
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*/
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#ifndef VM_H
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typedef u_char vm_prot_t;
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#endif
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/* Default version symbol. */
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#define VRS_SYM "_version"
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#define VRS_KEY "VERSION"
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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#ifndef _SSIZE_T_DECLARED
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typedef __ssize_t ssize_t;
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#define _SSIZE_T_DECLARED
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#endif
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struct kvm_nlist {
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const char *n_name;
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unsigned char n_type;
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kvaddr_t n_value;
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};
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typedef struct __kvm kvm_t;
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struct kinfo_proc;
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struct proc;
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struct kvm_swap {
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char ksw_devname[32];
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u_int ksw_used;
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u_int ksw_total;
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int ksw_flags;
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u_int ksw_reserved1;
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u_int ksw_reserved2;
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};
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struct kvm_page {
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u_int kp_version;
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kpaddr_t kp_paddr;
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kvaddr_t kp_kmap_vaddr;
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kvaddr_t kp_dmap_vaddr;
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vm_prot_t kp_prot;
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off_t kp_offset;
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size_t kp_len;
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/* end of version 2 */
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};
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#define SWIF_DEV_PREFIX 0x0002
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#define LIBKVM_WALK_PAGES_VERSION 2
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__BEGIN_DECLS
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int kvm_close(kvm_t *);
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int kvm_dpcpu_setcpu(kvm_t *, unsigned int);
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char **kvm_getargv(kvm_t *, const struct kinfo_proc *, int);
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int kvm_getcptime(kvm_t *, long *);
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char **kvm_getenvv(kvm_t *, const struct kinfo_proc *, int);
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char *kvm_geterr(kvm_t *);
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int kvm_getloadavg(kvm_t *, double [], int);
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int kvm_getmaxcpu(kvm_t *);
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int kvm_getncpus(kvm_t *);
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void *kvm_getpcpu(kvm_t *, int);
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uint64_t kvm_counter_u64_fetch(kvm_t *, u_long);
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struct kinfo_proc *
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kvm_getprocs(kvm_t *, int, int, int *);
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int kvm_getswapinfo(kvm_t *, struct kvm_swap *, int, int);
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int kvm_native(kvm_t *);
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int kvm_nlist(kvm_t *, struct nlist *);
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int kvm_nlist2(kvm_t *, struct kvm_nlist *);
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kvm_t *kvm_open
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(const char *, const char *, const char *, int, const char *);
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kvm_t *kvm_openfiles
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(const char *, const char *, const char *, int, char *);
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kvm_t *kvm_open2
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(const char *, const char *, int, char *,
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int (*)(const char *, kvaddr_t *));
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ssize_t kvm_read(kvm_t *, unsigned long, void *, size_t);
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ssize_t kvm_read_zpcpu(kvm_t *, unsigned long, void *, size_t, int);
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ssize_t kvm_read2(kvm_t *, kvaddr_t, void *, size_t);
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ssize_t kvm_write(kvm_t *, unsigned long, const void *, size_t);
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kssize_t kvm_kerndisp(kvm_t *);
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typedef int kvm_walk_pages_cb_t(struct kvm_page *, void *);
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int kvm_walk_pages(kvm_t *, kvm_walk_pages_cb_t *, void *);
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__END_DECLS
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#endif /* !_KVM_H_ */
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