2 * Copyright (c) 2010 Oleksandr Tymoshenko
3 * Copyright (c) 2008 Semihalf, Grzegorz Bernacki
4 * Copyright (c) 2006 Peter Wemm
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * From: FreeBSD: src/lib/libkvm/kvm_minidump_arm.c r214223
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * MIPS machine dependent routines for kvm and minidumps.
37 #include <sys/param.h>
45 #include "../../sys/mips/include/cpuregs.h"
46 #include "../../sys/mips/include/minidump.h"
48 #include "kvm_private.h"
51 #define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
54 struct minidumphdr hdr;
61 _mips_minidump_probe(kvm_t *kd)
64 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
65 kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
67 if (kd->nlehdr.e_machine != EM_MIPS)
69 return (_kvm_is_minidump(kd));
73 _mips_minidump_freevtop(kvm_t *kd)
75 struct vmstate *vm = kd->vmst;
77 _kvm_hpt_free(&vm->hpt);
85 _mips_minidump_initvtop(kvm_t *kd)
91 vmst = _kvm_malloc(kd, sizeof(*vmst));
93 _kvm_err(kd, kd->program, "cannot allocate vm");
99 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
100 kd->nlehdr.e_flags & EF_MIPS_ABI2)
105 if (pread(kd->pmfd, &vmst->hdr,
106 sizeof(vmst->hdr), 0) != sizeof(vmst->hdr)) {
107 _kvm_err(kd, kd->program, "cannot read dump header");
111 if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
112 sizeof(vmst->hdr.magic)) != 0) {
113 _kvm_err(kd, kd->program, "not a minidump for this platform");
116 vmst->hdr.version = _kvm32toh(kd, vmst->hdr.version);
117 if (vmst->hdr.version != MINIDUMP_VERSION) {
118 _kvm_err(kd, kd->program, "wrong minidump version. "
119 "Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
122 vmst->hdr.msgbufsize = _kvm32toh(kd, vmst->hdr.msgbufsize);
123 vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
124 vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
125 vmst->hdr.kernbase = _kvm64toh(kd, vmst->hdr.kernbase);
126 vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
127 vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
129 /* Skip header and msgbuf */
130 off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
132 bitmap = _kvm_malloc(kd, vmst->hdr.bitmapsize);
133 if (bitmap == NULL) {
134 _kvm_err(kd, kd->program, "cannot allocate %d bytes for "
135 "bitmap", vmst->hdr.bitmapsize);
139 if (pread(kd->pmfd, bitmap, vmst->hdr.bitmapsize, off) !=
140 (ssize_t)vmst->hdr.bitmapsize) {
141 _kvm_err(kd, kd->program, "cannot read %d bytes for page bitmap",
142 vmst->hdr.bitmapsize);
146 off += mips_round_page(vmst->hdr.bitmapsize);
148 vmst->ptemap = _kvm_malloc(kd, vmst->hdr.ptesize);
149 if (vmst->ptemap == NULL) {
150 _kvm_err(kd, kd->program, "cannot allocate %d bytes for "
151 "ptemap", vmst->hdr.ptesize);
156 if (pread(kd->pmfd, vmst->ptemap, vmst->hdr.ptesize, off) !=
157 (ssize_t)vmst->hdr.ptesize) {
158 _kvm_err(kd, kd->program, "cannot read %d bytes for ptemap",
164 off += vmst->hdr.ptesize;
166 /* Build physical address hash table for sparse pages */
167 _kvm_hpt_init(kd, &vmst->hpt, bitmap, vmst->hdr.bitmapsize, off,
168 MIPS_PAGE_SIZE, sizeof(*bitmap));
175 _mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
179 mips_physaddr_t offset, a;
186 _kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
190 offset = va & MIPS_PAGE_MASK;
191 /* Operate with page-aligned address */
192 va &= ~MIPS_PAGE_MASK;
195 ptemap32 = vm->ptemap;
196 ptemap64 = vm->ptemap;
198 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
199 if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
200 a = va & MIPS_XKPHYS_PHYS_MASK;
203 if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
204 a = va & MIPS_KSEG0_PHYS_MASK;
207 if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
208 a = va & MIPS_KSEG0_PHYS_MASK;
212 if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
213 a = va & MIPS_KSEG0_PHYS_MASK;
216 if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
217 a = va & MIPS_KSEG0_PHYS_MASK;
221 if (va >= vm->hdr.kernbase) {
222 pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
223 if (vm->pte_size == 64) {
224 pte = _kvm64toh(kd, ptemap64[pteindex]);
225 a = MIPS64_PTE_TO_PA(pte);
227 pte = _kvm32toh(kd, ptemap32[pteindex]);
228 a = MIPS32_PTE_TO_PA(pte);
231 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
236 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
237 "address 0x%jx not minidumped", (uintmax_t)va);
242 ofs = _kvm_hpt_find(&vm->hpt, a);
244 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
245 "address 0x%jx not in minidump", (uintmax_t)a);
250 return (MIPS_PAGE_SIZE - offset);
254 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
260 _mips_native(kvm_t *kd)
262 _mips_native(kvm_t *kd __unused)
268 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
271 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
274 if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
277 if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
281 #if _BYTE_ORDER == _LITTLE_ENDIAN
282 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
284 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
291 static struct kvm_arch kvm_mips_minidump = {
292 .ka_probe = _mips_minidump_probe,
293 .ka_initvtop = _mips_minidump_initvtop,
294 .ka_freevtop = _mips_minidump_freevtop,
295 .ka_kvatop = _mips_minidump_kvatop,
296 .ka_native = _mips_native,
299 KVM_ARCH(kvm_mips_minidump);