diff options
Diffstat (limited to 'lib/libkvm/kvm_sparc64.c')
| -rw-r--r-- | lib/libkvm/kvm_sparc64.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/lib/libkvm/kvm_sparc64.c b/lib/libkvm/kvm_sparc64.c new file mode 100644 index 0000000..1f925a9 --- /dev/null +++ b/lib/libkvm/kvm_sparc64.c @@ -0,0 +1,221 @@ +/*- + * 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 THE REGENTS 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 REGENTS 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. + * + * from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43 + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#if defined(LIBC_SCCS) && !defined(lint) +#if 0 +static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; +#endif +#endif /* LIBC_SCCS and not lint */ + +/* + * sparc64 machine dependent routines for kvm. + */ + +#include <sys/param.h> +#include <sys/user.h> +#include <sys/proc.h> +#include <sys/stat.h> +#include <stdlib.h> +#include <unistd.h> +#include <nlist.h> +#include <kvm.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> + +#include <machine/kerneldump.h> +#include <machine/tte.h> +#include <machine/tlb.h> +#include <machine/tsb.h> + +#include <limits.h> + +#include "kvm_private.h" + +#ifndef btop +#define btop(x) (sparc64_btop(x)) +#define ptob(x) (sparc64_ptob(x)) +#endif + +struct vmstate { + off_t vm_tsb_off; + vm_size_t vm_tsb_mask; + int vm_nregions; + struct sparc64_dump_reg *vm_regions; +}; + +void +_kvm_freevtop(kvm_t *kd) +{ + if (kd->vmst != 0) { + free(kd->vmst->vm_regions); + free(kd->vmst); + } +} + +static int +_kvm_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size) +{ + + /* XXX This has to be a raw file read, kvm_read is virtual. */ + if (lseek(kd->pmfd, pos, SEEK_SET) == -1) { + _kvm_syserr(kd, kd->program, "_kvm_read_phys: lseek"); + return (0); + } + if (read(kd->pmfd, buf, size) != (ssize_t)size) { + _kvm_syserr(kd, kd->program, "_kvm_read_phys: read"); + return (0); + } + return (1); +} + +static int +_kvm_reg_cmp(const void *a, const void *b) +{ + const struct sparc64_dump_reg *ra, *rb; + + ra = a; + rb = b; + if (ra->dr_pa < rb->dr_pa) + return (-1); + else if (ra->dr_pa >= rb->dr_pa + rb->dr_size) + return (1); + else + return (0); +} + +#define KVM_OFF_NOTFOUND 0 + +static off_t +_kvm_find_off(struct vmstate *vm, vm_offset_t pa, vm_size_t size) +{ + struct sparc64_dump_reg *reg, key; + vm_offset_t o; + + key.dr_pa = pa; + reg = bsearch(&key, vm->vm_regions, vm->vm_nregions, + sizeof(*vm->vm_regions), _kvm_reg_cmp); + if (reg == NULL) + return (KVM_OFF_NOTFOUND); + o = pa - reg->dr_pa; + if (o + size > reg->dr_size) + return (KVM_OFF_NOTFOUND); + return (reg->dr_offs + o); +} + +int +_kvm_initvtop(kvm_t *kd) +{ + struct sparc64_dump_hdr hdr; + struct sparc64_dump_reg *regs; + struct vmstate *vm; + size_t regsz; + vm_offset_t pa; + + vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); + if (vm == NULL) { + _kvm_err(kd, kd->program, "cannot allocate vm"); + return (-1); + } + kd->vmst = vm; + + if (!_kvm_read_phys(kd, 0, &hdr, sizeof(hdr))) + goto fail_vm; + pa = hdr.dh_tsb_pa; + + regsz = hdr.dh_nregions * sizeof(*regs); + regs = _kvm_malloc(kd, regsz); + if (regs == NULL) { + _kvm_err(kd, kd->program, "cannot allocate regions"); + goto fail_vm; + } + if (!_kvm_read_phys(kd, sizeof(hdr), regs, regsz)) + goto fail_regs; + qsort(regs, hdr.dh_nregions, sizeof(*regs), _kvm_reg_cmp); + + vm->vm_tsb_mask = hdr.dh_tsb_mask; + vm->vm_regions = regs; + vm->vm_nregions = hdr.dh_nregions; + vm->vm_tsb_off = _kvm_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size); + if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) { + _kvm_err(kd, kd->program, "tsb not found in dump"); + goto fail_regs; + } + return (0); + +fail_regs: + free(regs); +fail_vm: + free(vm); + return (-1); +} + +int +_kvm_kvatop(kvm_t *kd, u_long va, off_t *pa) +{ + struct tte tte; + off_t tte_off; + u_long vpn; + off_t pa_off; + u_long pg_off; + int rest; + + pg_off = va & PAGE_MASK; + if (va >= VM_MIN_DIRECT_ADDRESS) + pa_off = TLB_DIRECT_TO_PHYS(va) & ~PAGE_MASK; + else { + vpn = btop(va); + tte_off = kd->vmst->vm_tsb_off + + ((vpn & kd->vmst->vm_tsb_mask) << TTE_SHIFT); + if (!_kvm_read_phys(kd, tte_off, &tte, sizeof(tte))) + goto invalid; + if (!tte_match(&tte, va)) + goto invalid; + pa_off = TTE_GET_PA(&tte); + } + rest = PAGE_SIZE - pg_off; + pa_off = _kvm_find_off(kd->vmst, pa_off, rest); + if (pa_off == KVM_OFF_NOTFOUND) + goto invalid; + *pa = pa_off + pg_off; + return (rest); + +invalid: + _kvm_err(kd, 0, "invalid address (%lx)", va); + return (0); +} |
