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Diffstat (limited to 'lib/libkvm/kvm_private.h')
| -rw-r--r-- | lib/libkvm/kvm_private.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lib/libkvm/kvm_private.h b/lib/libkvm/kvm_private.h new file mode 100644 index 000000000000..0ab16dc58755 --- /dev/null +++ b/lib/libkvm/kvm_private.h @@ -0,0 +1,195 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 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. + * 3. 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. + */ + +#include <sys/endian.h> +#include <sys/linker_set.h> +#include <gelf.h> + +struct kvm_arch { + int (*ka_probe)(kvm_t *); + int (*ka_initvtop)(kvm_t *); + void (*ka_freevtop)(kvm_t *); + int (*ka_kvatop)(kvm_t *, kvaddr_t, off_t *); + int (*ka_native)(kvm_t *); + int (*ka_walk_pages)(kvm_t *, kvm_walk_pages_cb_t *, void *); + kssize_t (*ka_kerndisp)(kvm_t *); +}; + +#define KVM_ARCH(ka) DATA_SET(kvm_arch, ka) + +struct __kvm { + struct kvm_arch *arch; + /* + * a string to be prepended to error messages + * provided for compatibility with sun's interface + * if this value is null, errors are saved in errbuf[] + */ + const char *program; + char *errp; /* XXX this can probably go away */ + char errbuf[_POSIX2_LINE_MAX]; +#define ISALIVE(kd) ((kd)->vmfd >= 0) + int pmfd; /* physical memory file (or crashdump) */ + int vmfd; /* virtual memory file (-1 if crashdump) */ + int nlfd; /* namelist file (e.g., /kernel) */ + GElf_Ehdr nlehdr; /* ELF file header for namelist file */ + int (*resolve_symbol)(const char *, kvaddr_t *); + struct kinfo_proc *procbase; + char *argspc; /* (dynamic) storage for argv strings */ + int arglen; /* length of the above */ + char **argv; /* (dynamic) storage for argv pointers */ + int argc; /* length of above (not actual # present) */ + char *argbuf; /* (dynamic) temporary storage */ + /* + * Kernel virtual address translation state. This only gets filled + * in for dead kernels; otherwise, the running kernel (i.e. kmem) + * will do the translations for us. It could be big, so we + * only allocate it if necessary. + */ + struct vmstate *vmst; + int rawdump; /* raw dump format */ + int writable; /* physical memory is writable */ + + int vnet_initialized; /* vnet fields set up */ + kvaddr_t vnet_start; /* start of kernel's vnet region */ + kvaddr_t vnet_stop; /* stop of kernel's vnet region */ + kvaddr_t vnet_current; /* vnet we're working with */ + kvaddr_t vnet_base; /* vnet base of current vnet */ + + /* + * Dynamic per-CPU kernel memory. We translate symbols, on-demand, + * to the data associated with dpcpu_curcpu, set with + * kvm_dpcpu_setcpu(). + */ + int dpcpu_initialized; /* dpcpu fields set up */ + kvaddr_t dpcpu_start; /* start of kernel's dpcpu region */ + kvaddr_t dpcpu_stop; /* stop of kernel's dpcpu region */ + u_int dpcpu_maxcpus; /* size of base array */ + uintptr_t *dpcpu_off; /* base array, indexed by CPU ID */ + u_int dpcpu_curcpu; /* CPU we're currently working with */ + kvaddr_t dpcpu_curoff; /* dpcpu base of current CPU */ + + /* Page table lookup structures. */ + uint64_t *pt_map; + size_t pt_map_size; + uint64_t *dump_avail; /* actually word sized */ + size_t dump_avail_size; + off_t pt_sparse_off; + uint64_t pt_sparse_size; + uint32_t *pt_popcounts; + unsigned int pt_page_size; + + /* Page & sparse map structures. */ + void *page_map; + uint32_t page_map_size; + off_t page_map_off; + void *sparse_map; +}; + +struct kvm_bitmap { + uint8_t *map; + u_long size; +}; + +/* Page table lookup constants. */ +#define POPCOUNT_BITS 1024 +#define BITS_IN(v) (sizeof(v) * NBBY) +#define POPCOUNTS_IN(v) (POPCOUNT_BITS / BITS_IN(v)) + +/* + * Functions used internally by kvm, but across kvm modules. + */ +static inline uint16_t +_kvm16toh(kvm_t *kd, uint16_t val) +{ + + if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB) + return (le16toh(val)); + else + return (be16toh(val)); +} + +static inline uint32_t +_kvm32toh(kvm_t *kd, uint32_t val) +{ + + if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB) + return (le32toh(val)); + else + return (be32toh(val)); +} + +static inline uint64_t +_kvm64toh(kvm_t *kd, uint64_t val) +{ + + if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB) + return (le64toh(val)); + else + return (be64toh(val)); +} + +uint64_t _kvm_pa_bit_id(kvm_t *kd, uint64_t pa, unsigned int page_size); +uint64_t _kvm_bit_id_pa(kvm_t *kd, uint64_t bit_id, unsigned int page_size); +#define _KVM_PA_INVALID ULONG_MAX +#define _KVM_BIT_ID_INVALID ULONG_MAX + +int _kvm_bitmap_init(struct kvm_bitmap *, u_long, u_long *); +void _kvm_bitmap_set(struct kvm_bitmap *, u_long); +int _kvm_bitmap_next(struct kvm_bitmap *, u_long *); +void _kvm_bitmap_deinit(struct kvm_bitmap *); + +void _kvm_err(kvm_t *kd, const char *program, const char *fmt, ...) + __printflike(3, 4); +void _kvm_freeprocs(kvm_t *kd); +void *_kvm_malloc(kvm_t *kd, size_t); +int _kvm_nlist(kvm_t *, struct kvm_nlist *, int); +void *_kvm_realloc(kvm_t *kd, void *, size_t); +void _kvm_syserr (kvm_t *kd, const char *program, const char *fmt, ...) + __printflike(3, 4); +int _kvm_vnet_selectpid(kvm_t *, pid_t); +int _kvm_vnet_initialized(kvm_t *, int); +kvaddr_t _kvm_vnet_validaddr(kvm_t *, kvaddr_t); +int _kvm_dpcpu_initialized(kvm_t *, int); +kvaddr_t _kvm_dpcpu_validaddr(kvm_t *, kvaddr_t); +int _kvm_probe_elf_kernel(kvm_t *, int, int); +int _kvm_is_minidump(kvm_t *); +int _kvm_read_core_phdrs(kvm_t *, size_t *, GElf_Phdr **); +int _kvm_pt_init(kvm_t *, size_t, off_t, size_t, off_t, off_t, int); +off_t _kvm_pt_find(kvm_t *, uint64_t, unsigned int); +int _kvm_visit_cb(kvm_t *, kvm_walk_pages_cb_t *, void *, u_long, + u_long, u_long, vm_prot_t, size_t, unsigned int); +int _kvm_pmap_init(kvm_t *, uint32_t, off_t); +void * _kvm_pmap_get(kvm_t *, u_long, size_t); +void * _kvm_map_get(kvm_t *, u_long, unsigned int); |