Add support to libkvm for reading vmcores from other architectures.

- Add a kvaddr_type to represent kernel virtual addresses instead of
  unsigned long.
- Add a struct kvm_nlist which is a stripped down version of struct nlist
  that uses kvaddr_t for n_value.
- Add a kvm_native() routine that returns true if an open kvm descriptor
  is for a native kernel and memory image.
- Add a kvm_open2() function similar to kvm_openfiles().  It drops the
  unused 'swapfile' argument and adds a new function pointer argument for
  a symbol resolving function.  Native kernels still use _fdnlist() from
  libc to resolve symbols if a resolver function is not supplied, but cross
  kernels require a resolver.
- Add a kvm_nlist2() function similar to kvm_nlist() except that it uses
  struct kvm_nlist instead of struct nlist.
- Add a kvm_read2() function similar to kvm_read() except that it uses
  kvaddr_t instead of unsigned long for the kernel virtual address.
- Add a new kvm_arch switch of routines needed by a vmcore backend.
  Each backend is responsible for implementing kvm_read2() for a given
  vmcore format.
- Use libelf to read headers from ELF kernels and cores (except for
  powerpc cores).
- Add internal helper routines for the common page offset hash table used
  by the minidump backends.
- Port all of the existing kvm backends to implement a kvm_arch switch and
  to be cross-friendly by using private constants instead of ones that
  vary by platform (e.g. PAGE_SIZE).  Static assertions are present when
  a given backend is compiled natively to ensure the private constants
  match the real ones.
- Enable all of the existing vmcore backends on all platforms.  This means
  that libkvm on any platform should be able to perform KVA translation
  and read data from a vmcore of any platform.

Tested on:	amd64, i386, sparc64 (marius)
Differential Revision:	https://reviews.freebsd.org/D3341

1 files changed, 0 insertions, 116 deletions

diff --git a/lib/libkvm/kvm_mips.c b/lib/libkvm/kvm_mips.c
deleted file mode 100644
index 56e7fbf..0000000
--- a/lib/libkvm/kvm_mips.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*-
- * Copyright (C) 2006 Bruce M. Simpson.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * MIPS machine dependent routines for kvm.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/elf32.h>
-#include <sys/mman.h>
-
-#include <vm/vm.h>
-#include <vm/vm_param.h>
-#include <vm/pmap.h>
-
-#include <machine/pmap.h>
-
-#include <db.h>
-#include <limits.h>
-#include <kvm.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "kvm_private.h"
-
-/* minidump must be the first item! */
-struct vmstate {
-	int minidump;		/* 1 = minidump mode */
-	void *mmapbase;
-	size_t mmapsize;
-};
-
-void
-_kvm_freevtop(kvm_t *kd)
-{
-	if (kd->vmst != 0) {
-		if (kd->vmst->minidump)
-			return (_kvm_minidump_freevtop(kd));
-		if (kd->vmst->mmapbase != NULL)
-			munmap(kd->vmst->mmapbase, kd->vmst->mmapsize);
-		free(kd->vmst);
-		kd->vmst = NULL;
-	}
-}
-
-int
-_kvm_initvtop(kvm_t *kd)
-{
-	char minihdr[8];
-
-	if (!kd->rawdump) {
-		if (pread(kd->pmfd, &minihdr, 8, 0) == 8) {
-			if (memcmp(&minihdr, "minidump", 8) == 0)
-				return (_kvm_minidump_initvtop(kd));
-		} else {
-			_kvm_err(kd, kd->program, "cannot read header");
-			return (-1);
-		}
-	}
-
-	_kvm_err(kd, 0, "_kvm_initvtop: Unsupported image type");
-	return (-1);
-}
-
-int
-_kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
-{
-
-	if (kd->vmst->minidump)
-		return _kvm_minidump_kvatop(kd, va, pa);
-
-
-	_kvm_err(kd, 0, "_kvm_kvatop: Unsupported image type");
-	return (0);
-}
-
-/*
- * Machine-dependent initialization for ALL open kvm descriptors,
- * not just those for a kernel crash dump.  Some architectures
- * have to deal with these NOT being constants!  (i.e. m68k)
- */
-#ifdef FBSD_NOT_YET
-int
-_kvm_mdopen(kvm_t *kd __unused)
-{
-
-	return (0);
-}
-#endif