1 /*-
2 * Copyright (c) 1989, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software developed by the Computer Systems
6 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
7 * BG 91-66 and contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #if defined(LIBC_SCCS) && !defined(lint)
40 #if 0
41 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
42 #endif
43 #endif /* LIBC_SCCS and not lint */
44
45 /*
46 * sparc64 machine dependent routines for kvm.
47 */
48
49 #include <sys/param.h>
50 #include <kvm.h>
51 #include <limits.h>
52 #include <stdint.h>
53 #include <stdlib.h>
54 #include <unistd.h>
55
56 #include "../../sys/sparc64/include/kerneldump.h"
57
58 #include "kvm_private.h"
59 #include "kvm_sparc64.h"
60
61 struct vmstate {
62 off_t vm_tsb_off;
63 uint64_t vm_tsb_mask;
64 int vm_nregions;
65 struct sparc64_dump_reg *vm_regions;
66 };
67
68 static int
_sparc64_probe(kvm_t * kd)69 _sparc64_probe(kvm_t *kd)
70 {
71
72 return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_SPARCV9));
73 }
74
75 static void
_sparc64_freevtop(kvm_t * kd)76 _sparc64_freevtop(kvm_t *kd)
77 {
78
79 free(kd->vmst->vm_regions);
80 free(kd->vmst);
81 kd->vmst = NULL;
82 }
83
84 static int
_sparc64_read_phys(kvm_t * kd,off_t pos,void * buf,size_t size)85 _sparc64_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size)
86 {
87
88 /* XXX This has to be a raw file read, kvm_read is virtual. */
89 if (pread(kd->pmfd, buf, size, pos) != (ssize_t)size) {
90 _kvm_syserr(kd, kd->program, "_sparc64_read_phys: pread");
91 return (0);
92 }
93 return (1);
94 }
95
96 static int
_sparc64_reg_cmp(const void * a,const void * b)97 _sparc64_reg_cmp(const void *a, const void *b)
98 {
99 const struct sparc64_dump_reg *ra, *rb;
100
101 ra = a;
102 rb = b;
103 if (ra->dr_pa < rb->dr_pa)
104 return (-1);
105 else if (ra->dr_pa >= rb->dr_pa + rb->dr_size)
106 return (1);
107 else
108 return (0);
109 }
110
111 #define KVM_OFF_NOTFOUND 0
112
113 static off_t
_sparc64_find_off(struct vmstate * vm,uint64_t pa,uint64_t size)114 _sparc64_find_off(struct vmstate *vm, uint64_t pa, uint64_t size)
115 {
116 struct sparc64_dump_reg *reg, key;
117 vm_offset_t o;
118
119 key.dr_pa = pa;
120 reg = bsearch(&key, vm->vm_regions, vm->vm_nregions,
121 sizeof(*vm->vm_regions), _sparc64_reg_cmp);
122 if (reg == NULL)
123 return (KVM_OFF_NOTFOUND);
124 o = pa - reg->dr_pa;
125 if (o + size > reg->dr_size)
126 return (KVM_OFF_NOTFOUND);
127 return (reg->dr_offs + o);
128 }
129
130 static int
_sparc64_initvtop(kvm_t * kd)131 _sparc64_initvtop(kvm_t *kd)
132 {
133 struct sparc64_dump_hdr hdr;
134 struct sparc64_dump_reg *regs;
135 struct vmstate *vm;
136 size_t regsz;
137 uint64_t pa;
138 int i;
139
140 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
141 if (vm == NULL) {
142 _kvm_err(kd, kd->program, "cannot allocate vm");
143 return (-1);
144 }
145 kd->vmst = vm;
146
147 if (!_sparc64_read_phys(kd, 0, &hdr, sizeof(hdr)))
148 goto fail_vm;
149 hdr.dh_hdr_size = be64toh(hdr.dh_hdr_size);
150 hdr.dh_tsb_pa = be64toh(hdr.dh_tsb_pa);
151 hdr.dh_tsb_size = be64toh(hdr.dh_tsb_size);
152 hdr.dh_tsb_mask = be64toh(hdr.dh_tsb_mask);
153 hdr.dh_nregions = be32toh(hdr.dh_nregions);
154 pa = hdr.dh_tsb_pa;
155
156 regsz = hdr.dh_nregions * sizeof(*regs);
157 regs = _kvm_malloc(kd, regsz);
158 if (regs == NULL) {
159 _kvm_err(kd, kd->program, "cannot allocate regions");
160 goto fail_vm;
161 }
162 if (!_sparc64_read_phys(kd, sizeof(hdr), regs, regsz))
163 goto fail_regs;
164 for (i = 0; i < hdr.dh_nregions; i++) {
165 regs[i].dr_pa = be64toh(regs[i].dr_pa);
166 regs[i].dr_size = be64toh(regs[i].dr_size);
167 regs[i].dr_offs = be64toh(regs[i].dr_offs);
168 }
169 qsort(regs, hdr.dh_nregions, sizeof(*regs), _sparc64_reg_cmp);
170
171 vm->vm_tsb_mask = hdr.dh_tsb_mask;
172 vm->vm_regions = regs;
173 vm->vm_nregions = hdr.dh_nregions;
174 vm->vm_tsb_off = _sparc64_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size);
175 if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) {
176 _kvm_err(kd, kd->program, "tsb not found in dump");
177 goto fail_regs;
178 }
179 return (0);
180
181 fail_regs:
182 free(regs);
183 fail_vm:
184 free(vm);
185 return (-1);
186 }
187
188 static int
_sparc64_kvatop(kvm_t * kd,kvaddr_t va,off_t * pa)189 _sparc64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
190 {
191 struct sparc64_tte tte;
192 off_t tte_off;
193 kvaddr_t vpn;
194 off_t pa_off;
195 kvaddr_t pg_off;
196 int rest;
197
198 pg_off = va & SPARC64_PAGE_MASK;
199 if (va >= SPARC64_MIN_DIRECT_ADDRESS)
200 pa_off = SPARC64_DIRECT_TO_PHYS(va) & ~SPARC64_PAGE_MASK;
201 else {
202 vpn = va >> SPARC64_PAGE_SHIFT;
203 tte_off = kd->vmst->vm_tsb_off +
204 ((vpn & kd->vmst->vm_tsb_mask) << SPARC64_TTE_SHIFT);
205 if (!_sparc64_read_phys(kd, tte_off, &tte, sizeof(tte)))
206 goto invalid;
207 tte.tte_vpn = be64toh(tte.tte_vpn);
208 tte.tte_data = be64toh(tte.tte_data);
209 if (!sparc64_tte_match(&tte, va))
210 goto invalid;
211 pa_off = SPARC64_TTE_GET_PA(&tte);
212 }
213 rest = SPARC64_PAGE_SIZE - pg_off;
214 pa_off = _sparc64_find_off(kd->vmst, pa_off, rest);
215 if (pa_off == KVM_OFF_NOTFOUND)
216 goto invalid;
217 *pa = pa_off + pg_off;
218 return (rest);
219
220 invalid:
221 _kvm_err(kd, 0, "invalid address (%jx)", (uintmax_t)va);
222 return (0);
223 }
224
225 static int
_sparc64_native(kvm_t * kd)226 _sparc64_native(kvm_t *kd)
227 {
228
229 #ifdef __sparc64__
230 return (1);
231 #else
232 return (0);
233 #endif
234 }
235
236 struct kvm_arch kvm_sparc64 = {
237 .ka_probe = _sparc64_probe,
238 .ka_initvtop = _sparc64_initvtop,
239 .ka_freevtop = _sparc64_freevtop,
240 .ka_kvatop = _sparc64_kvatop,
241 .ka_native = _sparc64_native,
242 };
243
244 KVM_ARCH(kvm_sparc64);
245