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-rw-r--r--lib/libkvm/kvm_arm.c266
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diff --git a/lib/libkvm/kvm_arm.c b/lib/libkvm/kvm_arm.c
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+/*-
+ * Copyright (c) 2005 Olivier Houchard
+ * Copyright (c) 1989, 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software developed by the Computer Systems
+ * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
+ * BG 91-66 and contributed to Berkeley.
+ *
+ * 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
+ */
+
+/*
+ * ARM 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 */
+ pd_entry_t *l1pt;
+ void *mmapbase;
+ size_t mmapsize;
+};
+
+static int
+_kvm_maphdrs(kvm_t *kd, size_t sz)
+{
+ struct vmstate *vm = kd->vmst;
+
+ /* munmap() previous mmap(). */
+ if (vm->mmapbase != NULL) {
+ munmap(vm->mmapbase, vm->mmapsize);
+ vm->mmapbase = NULL;
+ }
+
+ vm->mmapsize = sz;
+ vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
+ if (vm->mmapbase == MAP_FAILED) {
+ _kvm_err(kd, kd->program, "cannot mmap corefile");
+ return (-1);
+ }
+
+ return (0);
+}
+
+/*
+ * Translate a physical memory address to a file-offset in the crash-dump.
+ */
+static size_t
+_kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs, size_t pgsz)
+{
+ Elf32_Ehdr *e = kd->vmst->mmapbase;
+ Elf32_Phdr *p = (Elf32_Phdr*)((char*)e + e->e_phoff);
+ int n = e->e_phnum;
+
+ while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
+ p++, n--;
+ if (n == 0)
+ return (0);
+
+ *ofs = (pa - p->p_paddr) + p->p_offset;
+ if (pgsz == 0)
+ return (p->p_memsz - (pa - p->p_paddr));
+ return (pgsz - ((size_t)pa & (pgsz - 1)));
+}
+
+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)
+{
+ struct vmstate *vm;
+ struct nlist nl[2];
+ u_long kernbase, physaddr, pa;
+ pd_entry_t *l1pt;
+ Elf32_Ehdr *ehdr;
+ size_t hdrsz;
+ 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);
+ }
+ }
+
+ vm = _kvm_malloc(kd, sizeof(*vm));
+ if (vm == 0) {
+ _kvm_err(kd, kd->program, "cannot allocate vm");
+ return (-1);
+ }
+ kd->vmst = vm;
+ vm->l1pt = NULL;
+ if (_kvm_maphdrs(kd, sizeof(Elf32_Ehdr)) == -1)
+ return (-1);
+ ehdr = kd->vmst->mmapbase;
+ hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
+ if (_kvm_maphdrs(kd, hdrsz) == -1)
+ return (-1);
+ nl[0].n_name = "kernbase";
+ nl[1].n_name = NULL;
+ if (kvm_nlist(kd, nl) != 0)
+ kernbase = KERNBASE;
+ else
+ kernbase = nl[0].n_value;
+
+ nl[0].n_name = "physaddr";
+ if (kvm_nlist(kd, nl) != 0) {
+ _kvm_err(kd, kd->program, "couldn't get phys addr");
+ return (-1);
+ }
+ physaddr = nl[0].n_value;
+ nl[0].n_name = "kernel_l1pa";
+ if (kvm_nlist(kd, nl) != 0) {
+ _kvm_err(kd, kd->program, "bad namelist");
+ return (-1);
+ }
+ if (kvm_read(kd, (nl[0].n_value - kernbase + physaddr), &pa,
+ sizeof(pa)) != sizeof(pa)) {
+ _kvm_err(kd, kd->program, "cannot read kernel_l1pa");
+ return (-1);
+ }
+ l1pt = _kvm_malloc(kd, L1_TABLE_SIZE);
+ if (kvm_read(kd, pa, l1pt, L1_TABLE_SIZE) != L1_TABLE_SIZE) {
+ _kvm_err(kd, kd->program, "cannot read l1pt");
+ free(l1pt);
+ return (-1);
+ }
+ vm->l1pt = l1pt;
+ return 0;
+}
+
+/* from arm/pmap.c */
+#define L1_IDX(va) (((vm_offset_t)(va)) >> L1_S_SHIFT)
+/* from arm/pmap.h */
+#define L1_TYPE_INV 0x00 /* Invalid (fault) */
+#define L1_TYPE_C 0x01 /* Coarse L2 */
+#define L1_TYPE_S 0x02 /* Section */
+#define L1_TYPE_F 0x03 /* Fine L2 */
+#define L1_TYPE_MASK 0x03 /* mask of type bits */
+
+#define l1pte_section_p(pde) (((pde) & L1_TYPE_MASK) == L1_TYPE_S)
+#define l1pte_valid(pde) ((pde) != 0)
+#define l2pte_valid(pte) ((pte) != 0)
+#define l2pte_index(v) (((v) & L2_ADDR_BITS) >> L2_S_SHIFT)
+
+
+int
+_kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
+{
+ struct vmstate *vm = kd->vmst;
+ pd_entry_t pd;
+ pt_entry_t pte;
+ u_long pte_pa;
+
+ if (kd->vmst->minidump)
+ return (_kvm_minidump_kvatop(kd, va, pa));
+
+ if (vm->l1pt == NULL)
+ return (_kvm_pa2off(kd, va, pa, PAGE_SIZE));
+ pd = vm->l1pt[L1_IDX(va)];
+ if (!l1pte_valid(pd))
+ goto invalid;
+ if (l1pte_section_p(pd)) {
+ /* 1MB section mapping. */
+ *pa = ((u_long)pd & L1_S_ADDR_MASK) + (va & L1_S_OFFSET);
+ return (_kvm_pa2off(kd, *pa, pa, L1_S_SIZE));
+ }
+ pte_pa = (pd & L1_ADDR_MASK) + l2pte_index(va) * sizeof(pte);
+ _kvm_pa2off(kd, pte_pa, (off_t *)&pte_pa, L1_S_SIZE);
+ if (lseek(kd->pmfd, pte_pa, 0) == -1) {
+ _kvm_syserr(kd, kd->program, "_kvm_kvatop: lseek");
+ goto invalid;
+ }
+ if (read(kd->pmfd, &pte, sizeof(pte)) != sizeof (pte)) {
+ _kvm_syserr(kd, kd->program, "_kvm_kvatop: read");
+ goto invalid;
+ }
+ if (!l2pte_valid(pte)) {
+ goto invalid;
+ }
+ if ((pte & L2_TYPE_MASK) == L2_TYPE_L) {
+ *pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
+ return (_kvm_pa2off(kd, *pa, pa, L2_L_SIZE));
+ }
+ *pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
+ return (_kvm_pa2off(kd, *pa, pa, PAGE_SIZE));
+invalid:
+ _kvm_err(kd, 0, "Invalid address (%lx)", va);
+ 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)
+{
+
+ kd->usrstack = USRSTACK;
+ kd->min_uva = VM_MIN_ADDRESS;
+ kd->max_uva = VM_MAXUSER_ADDRESS;
+
+ return (0);
+}
+#endif
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