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36 #include <sys/cdefs.h>
37 __SCCSID("@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93");
40 * i386 machine dependent routines for kvm. Hopefully, the forthcoming
41 * vm code will one day obsolete this module.
44 #include <sys/param.h>
45 #include <sys/endian.h>
54 #include <machine/vmparam.h> /* For KERNBASE. */
59 #include "kvm_private.h"
70 * Translate a physical memory address to a file-offset in the crash-dump.
73 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
75 struct vmstate *vm = kd->vmst;
81 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
86 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
90 *ofs = (pa - p->p_paddr) + p->p_offset;
91 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
95 _i386_freevtop(kvm_t *kd)
97 struct vmstate *vm = kd->vmst;
107 _i386_probe(kvm_t *kd)
110 return (_kvm_probe_elf_kernel(kd, ELFCLASS32, EM_386) &&
111 !_kvm_is_minidump(kd));
115 _i386_initvtop(kvm_t *kd)
117 struct kvm_nlist nl[2];
123 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(struct vmstate));
124 if (kd->vmst == NULL) {
125 _kvm_err(kd, kd->program, "cannot allocate vm");
130 if (kd->rawdump == 0) {
131 if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
132 &kd->vmst->phdr) == -1)
136 nl[0].n_name = "kernbase";
139 if (kvm_nlist2(kd, nl) != 0) {
141 kernbase = KERNBASE; /* for old kernels */
143 _kvm_err(kd, kd->program, "cannot resolve kernbase");
147 kernbase = nl[0].n_value;
149 nl[0].n_name = "IdlePDPT";
152 if (kvm_nlist2(kd, nl) == 0) {
153 i386_physaddr_pae_t pa64;
155 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
156 sizeof(pa)) != sizeof(pa)) {
157 _kvm_err(kd, kd->program, "cannot read IdlePDPT");
161 PTD = _kvm_malloc(kd, 4 * I386_PAGE_SIZE);
163 _kvm_err(kd, kd->program, "cannot allocate PTD");
166 for (i = 0; i < 4; i++) {
167 if (kvm_read2(kd, pa + (i * sizeof(pa64)), &pa64,
168 sizeof(pa64)) != sizeof(pa64)) {
169 _kvm_err(kd, kd->program, "Cannot read PDPT");
173 pa64 = le64toh(pa64);
174 if (kvm_read2(kd, pa64 & I386_PG_FRAME_PAE,
175 PTD + (i * I386_PAGE_SIZE), I386_PAGE_SIZE) !=
177 _kvm_err(kd, kd->program, "cannot read PDPT");
185 nl[0].n_name = "IdlePTD";
188 if (kvm_nlist2(kd, nl) != 0) {
189 _kvm_err(kd, kd->program, "bad namelist");
192 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
193 sizeof(pa)) != sizeof(pa)) {
194 _kvm_err(kd, kd->program, "cannot read IdlePTD");
198 PTD = _kvm_malloc(kd, I386_PAGE_SIZE);
200 _kvm_err(kd, kd->program, "cannot allocate PTD");
203 if (kvm_read2(kd, pa, PTD, I386_PAGE_SIZE) != I386_PAGE_SIZE) {
204 _kvm_err(kd, kd->program, "cannot read PTD");
214 _i386_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
217 i386_physaddr_t offset;
218 i386_physaddr_t pte_pa;
229 PTD = (i386_pde_t *)vm->PTD;
230 offset = va & I386_PAGE_MASK;
233 * If we are initializing (kernel page table descriptor pointer
234 * not yet set) then return pa == va to avoid infinite recursion.
237 s = _kvm_pa2off(kd, va, pa);
239 _kvm_err(kd, kd->program,
240 "_i386_vatop: bootstrap data not in dump");
243 return (I386_PAGE_SIZE - offset);
246 pdeindex = va >> I386_PDRSHIFT;
247 pde = le32toh(PTD[pdeindex]);
248 if ((pde & I386_PG_V) == 0) {
249 _kvm_err(kd, kd->program, "_i386_vatop: pde not valid");
253 if (pde & I386_PG_PS) {
255 * No second-level page table; ptd describes one 4MB
256 * page. (We assume that the kernel wouldn't set
257 * PG_PS without enabling it cr0).
259 offset = va & I386_PAGE_PS_MASK;
260 a = (pde & I386_PG_PS_FRAME) + offset;
261 s = _kvm_pa2off(kd, a, pa);
263 _kvm_err(kd, kd->program,
264 "_i386_vatop: 4MB page address not in dump");
267 return (I386_NBPDR - offset);
270 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG - 1);
271 pte_pa = (pde & I386_PG_FRAME) + (pteindex * sizeof(pte));
273 s = _kvm_pa2off(kd, pte_pa, &ofs);
274 if (s < sizeof(pte)) {
275 _kvm_err(kd, kd->program, "_i386_vatop: pte_pa not found");
279 /* XXX This has to be a physical address read, kvm_read is virtual */
280 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
281 _kvm_syserr(kd, kd->program, "_i386_vatop: pread");
285 if ((pte & I386_PG_V) == 0) {
286 _kvm_err(kd, kd->program, "_kvm_kvatop: pte not valid");
290 a = (pte & I386_PG_FRAME) + offset;
291 s = _kvm_pa2off(kd, a, pa);
293 _kvm_err(kd, kd->program, "_i386_vatop: address not in dump");
296 return (I386_PAGE_SIZE - offset);
299 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
304 _i386_vatop_pae(kvm_t *kd, kvaddr_t va, off_t *pa)
307 i386_physaddr_pae_t offset;
308 i386_physaddr_pae_t pte_pa;
314 i386_physaddr_pae_t a;
319 PTD = (i386_pde_pae_t *)vm->PTD;
320 offset = va & I386_PAGE_MASK;
323 * If we are initializing (kernel page table descriptor pointer
324 * not yet set) then return pa == va to avoid infinite recursion.
327 s = _kvm_pa2off(kd, va, pa);
329 _kvm_err(kd, kd->program,
330 "_i386_vatop_pae: bootstrap data not in dump");
333 return (I386_PAGE_SIZE - offset);
336 pdeindex = va >> I386_PDRSHIFT_PAE;
337 pde = le64toh(PTD[pdeindex]);
338 if ((pde & I386_PG_V) == 0) {
339 _kvm_err(kd, kd->program, "_kvm_kvatop_pae: pde not valid");
343 if (pde & I386_PG_PS) {
345 * No second-level page table; ptd describes one 2MB
346 * page. (We assume that the kernel wouldn't set
347 * PG_PS without enabling it cr0).
349 offset = va & I386_PAGE_PS_MASK_PAE;
350 a = (pde & I386_PG_PS_FRAME_PAE) + offset;
351 s = _kvm_pa2off(kd, a, pa);
353 _kvm_err(kd, kd->program,
354 "_i386_vatop: 2MB page address not in dump");
357 return (I386_NBPDR_PAE - offset);
360 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG_PAE - 1);
361 pte_pa = (pde & I386_PG_FRAME_PAE) + (pteindex * sizeof(pde));
363 s = _kvm_pa2off(kd, pte_pa, &ofs);
364 if (s < sizeof(pte)) {
365 _kvm_err(kd, kd->program, "_i386_vatop_pae: pdpe_pa not found");
369 /* XXX This has to be a physical address read, kvm_read is virtual */
370 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
371 _kvm_syserr(kd, kd->program, "_i386_vatop_pae: read");
375 if ((pte & I386_PG_V) == 0) {
376 _kvm_err(kd, kd->program, "_i386_vatop_pae: pte not valid");
380 a = (pte & I386_PG_FRAME_PAE) + offset;
381 s = _kvm_pa2off(kd, a, pa);
383 _kvm_err(kd, kd->program,
384 "_i386_vatop_pae: address not in dump");
387 return (I386_PAGE_SIZE - offset);
390 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
395 _i386_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
399 _kvm_err(kd, 0, "vatop called in live kernel!");
403 return (_i386_vatop_pae(kd, va, pa));
405 return (_i386_vatop(kd, va, pa));
409 _i386_native(kvm_t *kd __unused)
419 static struct kvm_arch kvm_i386 = {
420 .ka_probe = _i386_probe,
421 .ka_initvtop = _i386_initvtop,
422 .ka_freevtop = _i386_freevtop,
423 .ka_kvatop = _i386_kvatop,
424 .ka_native = _i386_native,