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kernel.c
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kernel.c
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/* kernel.c - core analysis suite
*
* Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002-2019 David Anderson
* Copyright (C) 2002-2019 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#include "xen_hyper_defs.h"
#include "xen_dom0.h"
#include <elf.h>
#include <libgen.h>
#include <ctype.h>
#include <stdbool.h>
#include "xendump.h"
static void do_module_cmd(ulong, char *, ulong, char *, char *);
static void show_module_taint(void);
static char *find_module_objfile(char *, char *, char *);
static char *module_objfile_search(char *, char *, char *);
static char *get_loadavg(char *);
static void get_lkcd_regs(struct bt_info *, ulong *, ulong *);
static void dump_sys_call_table(char *, int);
static int get_NR_syscalls(int *);
static ulong get_irq_desc_addr(int);
static void display_cpu_affinity(ulong *);
static void display_bh_1(void);
static void display_bh_2(void);
static void display_bh_3(void);
static void display_bh_4(void);
static void dump_hrtimer_data(const ulong *cpus);
static void dump_hrtimer_clock_base(const void *, const int);
static void dump_hrtimer_base(const void *, const int);
static void dump_active_timers(const void *, ulonglong);
static int get_expires_len(const int, const ulong *, ulonglong, const int);
static void print_timer(const void *, ulonglong);
static ulonglong ktime_to_ns(const void *);
static void dump_timer_data(const ulong *cpus);
static void dump_timer_data_tvec_bases_v1(const ulong *cpus);
static void dump_timer_data_tvec_bases_v2(const ulong *cpus);
static void dump_timer_data_tvec_bases_v3(const ulong *cpus);
static void dump_timer_data_timer_bases(const ulong *cpus);
struct tv_range;
static void init_tv_ranges(struct tv_range *, int, int, int);
static int do_timer_list(ulong,int, ulong *, void *,ulong *, ulong *, struct tv_range *, ulong);
static int do_timer_list_v3(ulong, int, ulong *, void *,ulong *, ulong *, ulong, long);
struct timer_bases_data;
static int do_timer_list_v4(struct timer_bases_data *, ulong);
static int compare_timer_data(const void *, const void *);
static void panic_this_kernel(void);
static void dump_waitq(ulong, char *);
static void reinit_modules(void);
static int verify_modules(void);
static void verify_namelist(void);
static char *debug_kernel_version(char *);
static int restore_stack(struct bt_info *);
static ulong __xen_m2p(ulonglong, ulong);
static ulong __xen_pvops_m2p_l2(ulonglong, ulong);
static ulong __xen_pvops_m2p_l3(ulonglong, ulong);
static ulong __xen_pvops_m2p_hyper(ulonglong, ulong);
static ulong __xen_pvops_m2p_domU(ulonglong, ulong);
static int read_xc_p2m(ulonglong, void *, long);
static void read_p2m(ulong, int, void *);
static int search_mapping_page(ulong, ulong *, ulong *, ulong *);
static void read_in_kernel_config_err(int, char *);
static void BUG_bytes_init(void);
static int BUG_x86(void);
static int BUG_x86_64(void);
static void cpu_maps_init(void);
static void get_xtime(struct timespec *);
static char *log_from_idx(uint32_t, char *);
static uint32_t log_next(uint32_t, char *);
static void dump_log_entry(char *, int);
static void dump_variable_length_record_log(int);
static void hypervisor_init(void);
static void dump_log_legacy(void);
static void dump_variable_length_record(void);
static int is_livepatch(void);
static void show_kernel_taints(char *, int);
static void dump_dmi_info(void);
static void list_source_code(struct gnu_request *, int);
static void source_tree_init(void);
static ulong dump_audit_skb_queue(ulong);
static ulong __dump_audit(char *);
static void dump_audit(void);
static char *vmcoreinfo_read_string(const char *);
static void check_vmcoreinfo(void);
/*
* Gather a few kernel basics.
*/
void
kernel_init()
{
int i, c;
char *p1, *p2, buf[BUFSIZE];
struct syment *sp1, *sp2;
char *rqstruct;
char *rq_timestamp_name = NULL;
char *irq_desc_type_name;
ulong pv_init_ops;
struct gnu_request req;
if (pc->flags & KERNEL_DEBUG_QUERY)
return;
if (!(kt->cpu_flags = (ulong *)calloc(NR_CPUS, sizeof(ulong))))
error(FATAL, "cannot malloc cpu_flags array");
cpu_maps_init();
kt->stext = symbol_value("_stext");
kt->etext = symbol_value("_etext");
get_text_init_space();
if (symbol_exists("__init_begin")) {
kt->init_begin = symbol_value("__init_begin");
kt->init_end = symbol_value("__init_end");
}
kt->end = highest_bss_symbol();
if ((sp1 = kernel_symbol_search("_end")) && (sp1->value > kt->end))
kt->end = sp1->value;
check_vmcoreinfo();
/*
* For the traditional (non-pv_ops) Xen architecture, default to writable
* page tables unless:
*
* (1) it's an "xm save" CANONICAL_PAGE_TABLES dumpfile, or
* (2) the --shadow_page_tables option was explicitly entered.
*
* But if the "phys_to_maching_mapping" array does not exist, and
* it's not an "xm save" canonical dumpfile, then we have no choice
* but to presume shadow page tables.
*/
if (!PVOPS() && symbol_exists("xen_start_info")) {
kt->flags |= ARCH_XEN;
if (!(kt->xen_flags & (SHADOW_PAGE_TABLES|CANONICAL_PAGE_TABLES)))
kt->xen_flags |= WRITABLE_PAGE_TABLES;
if (symbol_exists("phys_to_machine_mapping"))
get_symbol_data("phys_to_machine_mapping", sizeof(ulong),
&kt->phys_to_machine_mapping);
else if (!(kt->xen_flags & CANONICAL_PAGE_TABLES)) {
kt->xen_flags &= ~WRITABLE_PAGE_TABLES;
kt->xen_flags |= SHADOW_PAGE_TABLES;
}
if (machine_type("X86"))
get_symbol_data("max_pfn", sizeof(ulong), &kt->p2m_table_size);
if (machine_type("X86_64")) {
/*
* kernel version < 2.6.27 => end_pfn
* kernel version >= 2.6.27 => max_pfn
*/
if (!try_get_symbol_data("end_pfn", sizeof(ulong), &kt->p2m_table_size))
get_symbol_data("max_pfn", sizeof(ulong), &kt->p2m_table_size);
}
if ((kt->m2p_page = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc m2p page.");
}
if (PVOPS() && symbol_exists("pv_init_ops") &&
readmem(symbol_value("pv_init_ops"), KVADDR, &pv_init_ops,
sizeof(void *), "pv_init_ops", RETURN_ON_ERROR) &&
((p1 = value_symbol(pv_init_ops)) &&
(STREQ(p1, "xen_patch") || STREQ(p1, "paravirt_patch_default")))) {
kt->flags |= ARCH_XEN | ARCH_PVOPS_XEN;
kt->xen_flags |= WRITABLE_PAGE_TABLES;
if (machine_type("X86"))
get_symbol_data("max_pfn", sizeof(ulong), &kt->p2m_table_size);
if (machine_type("X86_64")) {
if (!try_get_symbol_data("end_pfn", sizeof(ulong), &kt->p2m_table_size))
get_symbol_data("max_pfn", sizeof(ulong), &kt->p2m_table_size);
}
if ((kt->m2p_page = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc m2p page.");
if (symbol_exists("p2m_mid_missing")) {
kt->pvops_xen.p2m_top_entries = XEN_P2M_TOP_PER_PAGE;
get_symbol_data("p2m_top", sizeof(ulong),
&kt->pvops_xen.p2m_top);
get_symbol_data("p2m_mid_missing", sizeof(ulong),
&kt->pvops_xen.p2m_mid_missing);
get_symbol_data("p2m_missing", sizeof(ulong),
&kt->pvops_xen.p2m_missing);
} else if (!symbol_exists("xen_p2m_addr")) {
kt->pvops_xen.p2m_top_entries = get_array_length("p2m_top", NULL, 0);
kt->pvops_xen.p2m_top = symbol_value("p2m_top");
kt->pvops_xen.p2m_missing = symbol_value("p2m_missing");
}
}
if (symbol_exists("smp_num_cpus")) {
kt->flags |= SMP;
get_symbol_data("smp_num_cpus", sizeof(int), &kt->cpus);
if (kt->cpus < 1 || kt->cpus > NR_CPUS)
error(WARNING,
"invalid value: smp_num_cpus: %d\n",
kt->cpus);
} else if (symbol_exists("__per_cpu_offset")) {
kt->flags |= SMP;
kt->cpus = 1;
} else
kt->cpus = 1;
if ((sp1 = symbol_search("__per_cpu_start")) &&
(sp2 = symbol_search("__per_cpu_end")) &&
(sp1->type == 'A' || sp1->type == 'D') &&
(sp2->type == 'A' || sp2->type == 'D') &&
(sp2->value > sp1->value))
kt->flags |= SMP|PER_CPU_OFF;
MEMBER_OFFSET_INIT(timekeeper_xtime, "timekeeper", "xtime");
MEMBER_OFFSET_INIT(timekeeper_xtime_sec, "timekeeper", "xtime_sec");
get_xtime(&kt->date);
if (CRASHDEBUG(1))
fprintf(fp, "xtime timespec.tv_sec: %lx: %s\n",
kt->date.tv_sec, ctime_tz(&kt->date.tv_sec));
if (kt->flags2 & GET_TIMESTAMP) {
fprintf(fp, "%s\n\n", ctime_tz(&kt->date.tv_sec));
clean_exit(0);
}
MEMBER_OFFSET_INIT(uts_namespace_name, "uts_namespace", "name");
if (symbol_exists("system_utsname"))
readmem(symbol_value("system_utsname"), KVADDR, &kt->utsname,
sizeof(struct new_utsname), "system_utsname",
RETURN_ON_ERROR);
else if (symbol_exists("init_uts_ns")) {
long offset = sizeof(int);
if (VALID_MEMBER(uts_namespace_name))
offset = OFFSET(uts_namespace_name);
readmem(symbol_value("init_uts_ns") + offset,
KVADDR, &kt->utsname, sizeof(struct new_utsname),
"init_uts_ns", RETURN_ON_ERROR);
} else
error(INFO, "cannot access utsname information\n\n");
if (CRASHDEBUG(1)) {
fprintf(fp, "utsname:\n");
fprintf(fp, " sysname: %s\n", printable_string(kt->utsname.sysname) ?
kt->utsname.sysname : "(not printable)");
fprintf(fp, " nodename: %s\n", printable_string(kt->utsname.nodename) ?
kt->utsname.nodename : "(not printable)");
fprintf(fp, " release: %s\n", printable_string(kt->utsname.release) ?
kt->utsname.release : "(not printable)");
fprintf(fp, " version: %s\n", printable_string(kt->utsname.version) ?
kt->utsname.version : "(not printable)");
fprintf(fp, " machine: %s\n", printable_string(kt->utsname.machine) ?
kt->utsname.machine : "(not printable)");
fprintf(fp, " domainname: %s\n", printable_string(kt->utsname.domainname) ?
kt->utsname.domainname : "(not printable)");
}
strncpy(buf, kt->utsname.release, 65);
if (buf[64])
buf[64] = NULLCHAR;
if (ascii_string(kt->utsname.release)) {
char separator;
p1 = p2 = buf;
while (*p2 != '.')
p2++;
*p2 = NULLCHAR;
kt->kernel_version[0] = atoi(p1);
p1 = ++p2;
while (*p2 != '.' && *p2 != '-' && *p2 != '\0')
p2++;
separator = *p2;
*p2 = NULLCHAR;
kt->kernel_version[1] = atoi(p1);
*p2 = separator;
if (*p2 == '.') {
p1 = ++p2;
while ((*p2 >= '0') && (*p2 <= '9'))
p2++;
*p2 = NULLCHAR;
kt->kernel_version[2] = atoi(p1);
} else
kt->kernel_version[2] = 0;
if (CRASHDEBUG(1))
fprintf(fp, "base kernel version: %d.%d.%d\n",
kt->kernel_version[0],
kt->kernel_version[1],
kt->kernel_version[2]);
} else
error(INFO, "cannot determine base kernel version\n");
verify_version();
if (symbol_exists("__per_cpu_offset")) {
if (LKCD_KERNTYPES())
i = get_cpus_possible();
else
i = get_array_length("__per_cpu_offset", NULL, 0);
get_symbol_data("__per_cpu_offset",
sizeof(long)*((i && (i <= NR_CPUS)) ? i : NR_CPUS),
&kt->__per_cpu_offset[0]);
kt->flags |= PER_CPU_OFF;
}
MEMBER_OFFSET_INIT(percpu_counter_count, "percpu_counter", "count");
if (STRUCT_EXISTS("runqueue")) {
rqstruct = "runqueue";
rq_timestamp_name = "timestamp_last_tick";
} else if (STRUCT_EXISTS("rq")) {
rqstruct = "rq";
if (MEMBER_EXISTS("rq", "clock"))
rq_timestamp_name = "clock";
else if (MEMBER_EXISTS("rq", "most_recent_timestamp"))
rq_timestamp_name = "most_recent_timestamp";
else if (MEMBER_EXISTS("rq", "timestamp_last_tick"))
rq_timestamp_name = "timestamp_last_tick";
} else {
rqstruct = NULL;
error(FATAL, "neither runqueue nor rq structures exist\n");
}
MEMBER_OFFSET_INIT(runqueue_cpu, rqstruct, "cpu");
/*
* 'cpu' does not exist in 'struct rq'.
*/
if (VALID_MEMBER(runqueue_cpu) &&
(get_array_length("runqueue.cpu", NULL, 0) > 0)) {
MEMBER_OFFSET_INIT(cpu_s_curr, "cpu_s", "curr");
MEMBER_OFFSET_INIT(cpu_s_idle, "cpu_s", "idle");
STRUCT_SIZE_INIT(cpu_s, "cpu_s");
kt->runq_siblings = get_array_length("runqueue.cpu",
NULL, 0);
if (symbol_exists("__cpu_idx") &&
symbol_exists("__rq_idx")) {
if (!(kt->__cpu_idx = (long *)
calloc(NR_CPUS, sizeof(long))))
error(FATAL, "cannot malloc __cpu_idx array");
if (!(kt->__rq_idx = (long *)
calloc(NR_CPUS, sizeof(long))))
error(FATAL, "cannot malloc __rq_idx array");
if (!readmem(symbol_value("__cpu_idx"), KVADDR,
&kt->__cpu_idx[0], sizeof(long) * NR_CPUS,
"__cpu_idx[NR_CPUS]", RETURN_ON_ERROR))
error(INFO,
"cannot read __cpu_idx[NR_CPUS] array\n");
if (!readmem(symbol_value("__rq_idx"), KVADDR,
&kt->__rq_idx[0], sizeof(long) * NR_CPUS,
"__rq_idx[NR_CPUS]", RETURN_ON_ERROR))
error(INFO,
"cannot read __rq_idx[NR_CPUS] array\n");
} else if (kt->runq_siblings > 1)
error(INFO,
"runq_siblings: %d: __cpu_idx and __rq_idx arrays don't exist?\n",
kt->runq_siblings);
} else {
MEMBER_OFFSET_INIT(runqueue_idle, rqstruct, "idle");
MEMBER_OFFSET_INIT(runqueue_curr, rqstruct, "curr");
ASSIGN_OFFSET(runqueue_cpu) = INVALID_OFFSET;
}
MEMBER_OFFSET_INIT(runqueue_active, rqstruct, "active");
MEMBER_OFFSET_INIT(runqueue_expired, rqstruct, "expired");
MEMBER_OFFSET_INIT(runqueue_arrays, rqstruct, "arrays");
MEMBER_OFFSET_INIT(rq_timestamp, rqstruct, rq_timestamp_name);
MEMBER_OFFSET_INIT(prio_array_queue, "prio_array", "queue");
MEMBER_OFFSET_INIT(prio_array_nr_active, "prio_array", "nr_active");
STRUCT_SIZE_INIT(runqueue, rqstruct);
STRUCT_SIZE_INIT(prio_array, "prio_array");
MEMBER_OFFSET_INIT(rq_cfs, "rq", "cfs");
MEMBER_OFFSET_INIT(task_group_cfs_rq, "task_group", "cfs_rq");
MEMBER_OFFSET_INIT(task_group_rt_rq, "task_group", "rt_rq");
MEMBER_OFFSET_INIT(task_group_parent, "task_group", "parent");
/*
* In 2.4, smp_send_stop() sets smp_num_cpus back to 1
* in some, but not all, architectures. So if a count
* of 1 is found, be suspicious, and check the
* init_tasks[NR_CPUS] array (also intro'd in 2.4),
* for idle thread addresses. For 2.2, prepare for the
* eventuality by verifying the cpu count with the machine
* dependent count.
*/
if ((kt->flags & SMP) && DUMPFILE() && (kt->cpus == 1)) {
if (symbol_exists("init_tasks")) {
ulong init_tasks[NR_CPUS];
int nr_cpus;
BZERO(&init_tasks[0], sizeof(ulong) * NR_CPUS);
nr_cpus = get_array_length("init_tasks", NULL, 0);
if ((nr_cpus < 1) || (nr_cpus > NR_CPUS))
nr_cpus = NR_CPUS;
get_idle_threads(&init_tasks[0], nr_cpus);
for (i = kt->cpus = 0; i < nr_cpus; i++)
if (init_tasks[i])
kt->cpus++;
} else
kt->cpus = machdep->get_smp_cpus();
}
if ((kt->flags & SMP) && ACTIVE() && (kt->cpus == 1) &&
(kt->flags & PER_CPU_OFF))
kt->cpus = machdep->get_smp_cpus();
if (kt->cpus_override && (c = atoi(kt->cpus_override))) {
error(WARNING, "forcing cpu count to: %d\n\n", c);
kt->cpus = c;
}
if (kt->cpus > NR_CPUS) {
error(WARNING,
"%s number of cpus (%d) greater than compiled-in NR_CPUS (%d)\n",
kt->cpus_override && atoi(kt->cpus_override) ?
"configured" : "calculated", kt->cpus, NR_CPUS);
error(FATAL, "recompile crash with larger NR_CPUS\n");
}
hypervisor_init();
STRUCT_SIZE_INIT(spinlock_t, "spinlock_t");
verify_spinlock();
if (STRUCT_EXISTS("atomic_t"))
if (MEMBER_EXISTS("atomic_t", "counter"))
MEMBER_OFFSET_INIT(atomic_t_counter,
"atomic_t", "counter");
STRUCT_SIZE_INIT(list_head, "list_head");
MEMBER_OFFSET_INIT(list_head_next, "list_head", "next");
MEMBER_OFFSET_INIT(list_head_prev, "list_head", "prev");
if (OFFSET(list_head_next) != 0)
error(WARNING,
"list_head.next offset: %ld: list command may fail\n",
OFFSET(list_head_next));
MEMBER_OFFSET_INIT(hlist_node_next, "hlist_node", "next");
MEMBER_OFFSET_INIT(hlist_node_pprev, "hlist_node", "pprev");
STRUCT_SIZE_INIT(hlist_head, "hlist_head");
STRUCT_SIZE_INIT(hlist_node, "hlist_node");
if (STRUCT_EXISTS("irq_desc_t"))
irq_desc_type_name = "irq_desc_t";
else
irq_desc_type_name = "irq_desc";
STRUCT_SIZE_INIT(irq_desc_t, irq_desc_type_name);
if (MEMBER_EXISTS(irq_desc_type_name, "irq_data"))
MEMBER_OFFSET_INIT(irq_desc_t_irq_data, irq_desc_type_name, "irq_data");
else
MEMBER_OFFSET_INIT(irq_desc_t_affinity, irq_desc_type_name, "affinity");
if (MEMBER_EXISTS(irq_desc_type_name, "kstat_irqs"))
MEMBER_OFFSET_INIT(irq_desc_t_kstat_irqs, irq_desc_type_name, "kstat_irqs");
MEMBER_OFFSET_INIT(irq_desc_t_name, irq_desc_type_name, "name");
MEMBER_OFFSET_INIT(irq_desc_t_status, irq_desc_type_name, "status");
if (MEMBER_EXISTS(irq_desc_type_name, "handler"))
MEMBER_OFFSET_INIT(irq_desc_t_handler, irq_desc_type_name, "handler");
else if (MEMBER_EXISTS(irq_desc_type_name, "chip"))
MEMBER_OFFSET_INIT(irq_desc_t_chip, irq_desc_type_name, "chip");
MEMBER_OFFSET_INIT(irq_desc_t_action, irq_desc_type_name, "action");
MEMBER_OFFSET_INIT(irq_desc_t_depth, irq_desc_type_name, "depth");
STRUCT_SIZE_INIT(kernel_stat, "kernel_stat");
MEMBER_OFFSET_INIT(kernel_stat_irqs, "kernel_stat", "irqs");
if (STRUCT_EXISTS("hw_interrupt_type")) {
MEMBER_OFFSET_INIT(hw_interrupt_type_typename,
"hw_interrupt_type", "typename");
MEMBER_OFFSET_INIT(hw_interrupt_type_startup,
"hw_interrupt_type", "startup");
MEMBER_OFFSET_INIT(hw_interrupt_type_shutdown,
"hw_interrupt_type", "shutdown");
MEMBER_OFFSET_INIT(hw_interrupt_type_handle,
"hw_interrupt_type", "handle");
MEMBER_OFFSET_INIT(hw_interrupt_type_enable,
"hw_interrupt_type", "enable");
MEMBER_OFFSET_INIT(hw_interrupt_type_disable,
"hw_interrupt_type", "disable");
MEMBER_OFFSET_INIT(hw_interrupt_type_ack,
"hw_interrupt_type", "ack");
MEMBER_OFFSET_INIT(hw_interrupt_type_end,
"hw_interrupt_type", "end");
MEMBER_OFFSET_INIT(hw_interrupt_type_set_affinity,
"hw_interrupt_type", "set_affinity");
} else { /*
* On later kernels where hw_interrupt_type was replaced
* by irq_chip
*/
MEMBER_OFFSET_INIT(irq_chip_typename,
"irq_chip", "name");
MEMBER_OFFSET_INIT(irq_chip_startup,
"irq_chip", "startup");
MEMBER_OFFSET_INIT(irq_chip_shutdown,
"irq_chip", "shutdown");
MEMBER_OFFSET_INIT(irq_chip_enable,
"irq_chip", "enable");
MEMBER_OFFSET_INIT(irq_chip_disable,
"irq_chip", "disable");
MEMBER_OFFSET_INIT(irq_chip_ack,
"irq_chip", "ack");
MEMBER_OFFSET_INIT(irq_chip_mask,
"irq_chip", "mask");
MEMBER_OFFSET_INIT(irq_chip_mask_ack,
"irq_chip", "mask_ack");
MEMBER_OFFSET_INIT(irq_chip_unmask,
"irq_chip", "unmask");
MEMBER_OFFSET_INIT(irq_chip_eoi,
"irq_chip", "eoi");
MEMBER_OFFSET_INIT(irq_chip_end,
"irq_chip", "end");
MEMBER_OFFSET_INIT(irq_chip_set_affinity,
"irq_chip", "set_affinity");
MEMBER_OFFSET_INIT(irq_chip_retrigger,
"irq_chip", "retrigger");
MEMBER_OFFSET_INIT(irq_chip_set_type,
"irq_chip", "set_type");
MEMBER_OFFSET_INIT(irq_chip_set_wake,
"irq_chip", "set_wake");
}
MEMBER_OFFSET_INIT(irqaction_handler, "irqaction", "handler");
MEMBER_OFFSET_INIT(irqaction_flags, "irqaction", "flags");
MEMBER_OFFSET_INIT(irqaction_mask, "irqaction", "mask");
MEMBER_OFFSET_INIT(irqaction_name, "irqaction", "name");
MEMBER_OFFSET_INIT(irqaction_dev_id, "irqaction", "dev_id");
MEMBER_OFFSET_INIT(irqaction_next, "irqaction", "next");
if (kernel_symbol_exists("irq_desc_tree")) {
get_symbol_type("irq_desc_tree", NULL, &req);
if (STREQ(req.type_tag_name, "xarray")) {
kt->flags2 |= IRQ_DESC_TREE_XARRAY;
} else {
if (MEMBER_EXISTS("radix_tree_root", "xa_head"))
kt->flags2 |= IRQ_DESC_TREE_XARRAY;
else
kt->flags2 |= IRQ_DESC_TREE_RADIX;
}
}
STRUCT_SIZE_INIT(irq_data, "irq_data");
if (VALID_STRUCT(irq_data)) {
MEMBER_OFFSET_INIT(irq_data_chip, "irq_data", "chip");
MEMBER_OFFSET_INIT(irq_data_affinity, "irq_data", "affinity");
MEMBER_OFFSET_INIT(irq_desc_irq_data, "irq_desc", "irq_data");
}
STRUCT_SIZE_INIT(irq_common_data, "irq_common_data");
if (VALID_STRUCT(irq_common_data)) {
MEMBER_OFFSET_INIT(irq_common_data_affinity, "irq_common_data", "affinity");
MEMBER_OFFSET_INIT(irq_desc_irq_common_data, "irq_desc", "irq_common_data");
}
STRUCT_SIZE_INIT(irq_cpustat_t, "irq_cpustat_t");
MEMBER_OFFSET_INIT(irq_cpustat_t___softirq_active,
"irq_cpustat_t", "__softirq_active");
MEMBER_OFFSET_INIT(irq_cpustat_t___softirq_mask,
"irq_cpustat_t", "__softirq_mask");
STRUCT_SIZE_INIT(timer_list, "timer_list");
MEMBER_OFFSET_INIT(timer_list_list, "timer_list", "list");
MEMBER_OFFSET_INIT(timer_list_next, "timer_list", "next");
MEMBER_OFFSET_INIT(timer_list_entry, "timer_list", "entry");
MEMBER_OFFSET_INIT(timer_list_expires, "timer_list", "expires");
MEMBER_OFFSET_INIT(timer_list_function, "timer_list", "function");
STRUCT_SIZE_INIT(timer_vec_root, "timer_vec_root");
if (VALID_STRUCT(timer_vec_root))
MEMBER_OFFSET_INIT(timer_vec_root_vec,
"timer_vec_root", "vec");
STRUCT_SIZE_INIT(timer_vec, "timer_vec");
if (VALID_STRUCT(timer_vec))
MEMBER_OFFSET_INIT(timer_vec_vec, "timer_vec", "vec");
STRUCT_SIZE_INIT(tvec_root_s, "tvec_root_s");
if (VALID_STRUCT(tvec_root_s)) {
STRUCT_SIZE_INIT(tvec_t_base_s, "tvec_t_base_s");
MEMBER_OFFSET_INIT(tvec_t_base_s_tv1,
"tvec_t_base_s", "tv1");
MEMBER_OFFSET_INIT(tvec_root_s_vec,
"tvec_root_s", "vec");
STRUCT_SIZE_INIT(tvec_s, "tvec_s");
MEMBER_OFFSET_INIT(tvec_s_vec, "tvec_s", "vec");
} else {
STRUCT_SIZE_INIT(tvec_root_s, "tvec_root");
if (VALID_STRUCT(tvec_root_s)) {
STRUCT_SIZE_INIT(tvec_t_base_s, "tvec_base");
MEMBER_OFFSET_INIT(tvec_t_base_s_tv1,
"tvec_base", "tv1");
MEMBER_OFFSET_INIT(tvec_root_s_vec,
"tvec_root", "vec");
STRUCT_SIZE_INIT(tvec_s, "tvec");
MEMBER_OFFSET_INIT(tvec_s_vec, "tvec", "vec");
}
}
if (per_cpu_symbol_search("timer_bases")) {
kt->flags2 |= TIMER_BASES;
MEMBER_OFFSET_INIT(timer_base_vectors, "timer_base", "vectors");
STRUCT_SIZE_INIT(timer_base, "timer_base");
} else if (per_cpu_symbol_search("per_cpu__tvec_bases")) {
if (MEMBER_EXISTS("tvec_base", "migration_enabled"))
kt->flags2 |= TVEC_BASES_V3;
else
kt->flags |= TVEC_BASES_V2;
} else if (symbol_exists("tvec_bases"))
kt->flags |= TVEC_BASES_V1;
STRUCT_SIZE_INIT(__wait_queue, "__wait_queue");
if (VALID_STRUCT(__wait_queue)) {
if (MEMBER_EXISTS("__wait_queue", "task"))
MEMBER_OFFSET_INIT(__wait_queue_task,
"__wait_queue", "task");
else
MEMBER_OFFSET_INIT(__wait_queue_task,
"__wait_queue", "private");
MEMBER_OFFSET_INIT(__wait_queue_head_task_list,
"__wait_queue_head", "task_list");
MEMBER_OFFSET_INIT(__wait_queue_task_list,
"__wait_queue", "task_list");
} else {
STRUCT_SIZE_INIT(wait_queue, "wait_queue");
if (VALID_STRUCT(wait_queue)) {
MEMBER_OFFSET_INIT(wait_queue_task,
"wait_queue", "task");
MEMBER_OFFSET_INIT(wait_queue_next,
"wait_queue", "next");
}
}
STRUCT_SIZE_INIT(pt_regs, "pt_regs");
STRUCT_SIZE_INIT(softirq_state, "softirq_state");
STRUCT_SIZE_INIT(softirq_action, "softirq_action");
STRUCT_SIZE_INIT(desc_struct, "desc_struct");
STRUCT_SIZE_INIT(char_device_struct, "char_device_struct");
if (VALID_STRUCT(char_device_struct)) {
MEMBER_OFFSET_INIT(char_device_struct_next,
"char_device_struct", "next");
MEMBER_OFFSET_INIT(char_device_struct_name,
"char_device_struct", "name");
MEMBER_OFFSET_INIT(char_device_struct_fops,
"char_device_struct", "fops");
MEMBER_OFFSET_INIT(char_device_struct_major,
"char_device_struct", "major");
MEMBER_OFFSET_INIT(char_device_struct_baseminor,
"char_device_struct", "baseminor");
MEMBER_OFFSET_INIT(char_device_struct_cdev,
"char_device_struct", "cdev");
}
STRUCT_SIZE_INIT(cdev, "cdev");
if (VALID_STRUCT(cdev))
MEMBER_OFFSET_INIT(cdev_ops, "cdev", "ops");
STRUCT_SIZE_INIT(probe, "probe");
if (VALID_STRUCT(probe)) {
MEMBER_OFFSET_INIT(probe_next, "probe", "next");
MEMBER_OFFSET_INIT(probe_dev, "probe", "dev");
MEMBER_OFFSET_INIT(probe_data, "probe", "data");
}
STRUCT_SIZE_INIT(kobj_map, "kobj_map");
if (VALID_STRUCT(kobj_map))
MEMBER_OFFSET_INIT(kobj_map_probes, "kobj_map", "probes");
MEMBER_OFFSET_INIT(module_kallsyms_start, "module",
"kallsyms_start");
STRUCT_SIZE_INIT(kallsyms_header, "kallsyms_header");
if (VALID_MEMBER(module_kallsyms_start) &&
VALID_SIZE(kallsyms_header)) {
MEMBER_OFFSET_INIT(kallsyms_header_sections,
"kallsyms_header", "sections");
MEMBER_OFFSET_INIT(kallsyms_header_section_off,
"kallsyms_header", "section_off");
MEMBER_OFFSET_INIT(kallsyms_header_symbols,
"kallsyms_header", "symbols");
MEMBER_OFFSET_INIT(kallsyms_header_symbol_off,
"kallsyms_header", "symbol_off");
MEMBER_OFFSET_INIT(kallsyms_header_string_off,
"kallsyms_header", "string_off");
MEMBER_OFFSET_INIT(kallsyms_symbol_section_off,
"kallsyms_symbol", "section_off");
MEMBER_OFFSET_INIT(kallsyms_symbol_symbol_addr,
"kallsyms_symbol", "symbol_addr");
MEMBER_OFFSET_INIT(kallsyms_symbol_name_off,
"kallsyms_symbol", "name_off");
MEMBER_OFFSET_INIT(kallsyms_section_start,
"kallsyms_section", "start");
MEMBER_OFFSET_INIT(kallsyms_section_size,
"kallsyms_section", "size");
MEMBER_OFFSET_INIT(kallsyms_section_name_off,
"kallsyms_section", "name_off");
STRUCT_SIZE_INIT(kallsyms_symbol, "kallsyms_symbol");
STRUCT_SIZE_INIT(kallsyms_section, "kallsyms_section");
if (!(kt->flags & NO_KALLSYMS))
kt->flags |= KALLSYMS_V1;
}
MEMBER_OFFSET_INIT(module_num_symtab, "module", "num_symtab");
if (VALID_MEMBER(module_num_symtab)) {
MEMBER_OFFSET_INIT(module_symtab, "module", "symtab");
MEMBER_OFFSET_INIT(module_strtab, "module", "strtab");
if (!(kt->flags & NO_KALLSYMS))
kt->flags |= KALLSYMS_V2;
}
if (INVALID_MEMBER(module_num_symtab) &&
MEMBER_EXISTS("module", "core_kallsyms")) {
ASSIGN_OFFSET(module_num_symtab) =
MEMBER_OFFSET("module", "core_kallsyms") +
MEMBER_OFFSET("mod_kallsyms", "num_symtab");
ASSIGN_OFFSET(module_symtab) =
MEMBER_OFFSET("module", "core_kallsyms") +
MEMBER_OFFSET("mod_kallsyms", "symtab");
ASSIGN_OFFSET(module_strtab) =
MEMBER_OFFSET("module", "core_kallsyms") +
MEMBER_OFFSET("mod_kallsyms", "strtab");
if (!(kt->flags & NO_KALLSYMS))
kt->flags |= KALLSYMS_V2;
}
if (!(kt->flags & DWARF_UNWIND))
kt->flags |= NO_DWARF_UNWIND;
/*
* OpenVZ
*/
if (kernel_symbol_exists("pcpu_info") &&
STRUCT_EXISTS("pcpu_info") && STRUCT_EXISTS("vcpu_struct")) {
MEMBER_OFFSET_INIT(pcpu_info_vcpu, "pcpu_info", "vcpu");
MEMBER_OFFSET_INIT(pcpu_info_idle, "pcpu_info", "idle");
MEMBER_OFFSET_INIT(vcpu_struct_rq, "vcpu_struct", "rq");
STRUCT_SIZE_INIT(pcpu_info, "pcpu_info");
STRUCT_SIZE_INIT(vcpu_struct, "vcpu_struct");
kt->flags |= ARCH_OPENVZ;
}
STRUCT_SIZE_INIT(mem_section, "mem_section");
BUG_bytes_init();
/*
* for hrtimer
*/
STRUCT_SIZE_INIT(hrtimer_clock_base, "hrtimer_clock_base");
if (VALID_STRUCT(hrtimer_clock_base)) {
MEMBER_OFFSET_INIT(hrtimer_clock_base_offset,
"hrtimer_clock_base", "offset");
MEMBER_OFFSET_INIT(hrtimer_clock_base_active,
"hrtimer_clock_base", "active");
MEMBER_OFFSET_INIT(hrtimer_clock_base_first,
"hrtimer_clock_base", "first");
MEMBER_OFFSET_INIT(hrtimer_clock_base_get_time,
"hrtimer_clock_base", "get_time");
}
STRUCT_SIZE_INIT(hrtimer_base, "hrtimer_base");
if (VALID_STRUCT(hrtimer_base)) {
MEMBER_OFFSET_INIT(hrtimer_base_first,
"hrtimer_base", "first");
MEMBER_OFFSET_INIT(hrtimer_base_pending,
"hrtimer_base", "pending");
MEMBER_OFFSET_INIT(hrtimer_base_get_time,
"hrtimer_base", "get_time");
}
MEMBER_OFFSET_INIT(hrtimer_cpu_base_clock_base, "hrtimer_cpu_base",
"clock_base");
MEMBER_OFFSET_INIT(hrtimer_node, "hrtimer", "node");
MEMBER_OFFSET_INIT(hrtimer_list, "hrtimer", "list");
MEMBER_OFFSET_INIT(hrtimer_expires, "hrtimer", "expires");
if (INVALID_MEMBER(hrtimer_expires))
MEMBER_OFFSET_INIT(hrtimer_expires, "hrtimer", "_expires");
if (INVALID_MEMBER(hrtimer_expires)) {
MEMBER_OFFSET_INIT(timerqueue_head_next,
"timerqueue_head", "next");
MEMBER_OFFSET_INIT(timerqueue_node_expires,
"timerqueue_node", "expires");
MEMBER_OFFSET_INIT(timerqueue_node_node,
"timerqueue_node", "node");
if (INVALID_MEMBER(timerqueue_head_next)) {
MEMBER_OFFSET_INIT(timerqueue_head_rb_root,
"timerqueue_head", "rb_root");
MEMBER_OFFSET_INIT(rb_root_cached_rb_leftmost,
"rb_root_cached", "rb_leftmost");
}
}
MEMBER_OFFSET_INIT(hrtimer_softexpires, "hrtimer", "_softexpires");
MEMBER_OFFSET_INIT(hrtimer_function, "hrtimer", "function");
MEMBER_OFFSET_INIT(ktime_t_tv64, "ktime", "tv64");
if (INVALID_MEMBER(ktime_t_tv64))
MEMBER_OFFSET_INIT(ktime_t_tv64, "ktime_t", "tv64");
MEMBER_OFFSET_INIT(ktime_t_sec, "ktime", "sec");
if (INVALID_MEMBER(ktime_t_sec))
MEMBER_OFFSET_INIT(ktime_t_sec, "ktime_t", "sec");
MEMBER_OFFSET_INIT(ktime_t_nsec, "ktime", "nsec");
if (INVALID_MEMBER(ktime_t_nsec))
MEMBER_OFFSET_INIT(ktime_t_nsec, "ktime_t", "nsec");
if (kt->source_tree)
source_tree_init();
kt->flags &= ~PRE_KERNEL_INIT;
}
/*
* Get cpu map address. Types are: possible, online, present and active.
* They exist as either:
*
* (1) cpu_<type>_map symbols, or
* (2) what is pointed to by cpu_<type>_mask
*/
ulong
cpu_map_addr(const char *type)
{
char map_symbol[32];
ulong addr;
sprintf(map_symbol, "cpu_%s_map", type);
if (kernel_symbol_exists(map_symbol))
return symbol_value(map_symbol);
sprintf(map_symbol, "cpu_%s_mask", type);
if (kernel_symbol_exists(map_symbol)) {
get_symbol_data(map_symbol, sizeof(ulong), &addr);
return addr;
}
sprintf(map_symbol, "__cpu_%s_mask", type);
if (kernel_symbol_exists(map_symbol))
return symbol_value(map_symbol);
return 0;
}
static char *
cpu_map_type(char *name)
{
char map_symbol[32];
sprintf(map_symbol, "cpu_%s_map", name);
if (kernel_symbol_exists(map_symbol))
return "map";
sprintf(map_symbol, "cpu_%s_mask", name);
if (kernel_symbol_exists(map_symbol))
return "mask";
sprintf(map_symbol, "__cpu_%s_map", name);
if (kernel_symbol_exists(map_symbol))
return "map";
sprintf(map_symbol, "__cpu_%s_mask", name);
if (kernel_symbol_exists(map_symbol))
return "mask";
return NULL;
}
/*
* Get cpu map (possible, online, etc.) size
*/
static int
cpu_map_size(const char *type)
{
int len;
char map_symbol[32];
struct gnu_request req;
if (LKCD_KERNTYPES()) {
if ((len = STRUCT_SIZE("cpumask_t")) < 0)
error(FATAL, "cannot determine type cpumask_t\n");
return len;
}
sprintf(map_symbol, "cpu_%s_map", type);
if (kernel_symbol_exists(map_symbol)) {
len = get_symbol_type(map_symbol, NULL, &req) ==
TYPE_CODE_UNDEF ? sizeof(ulong) : req.length;
return len;
}
len = STRUCT_SIZE("cpumask_t");
if (len < 0)
return sizeof(ulong);
else
return len;
}
/*
* If the cpu_present_map, cpu_online_map and cpu_possible_maps exist,
* set up the kt->cpu_flags[NR_CPUS] with their settings.
*/
static void
cpu_maps_init(void)
{
int i, c, m, cpu, len;
char *buf;
ulong *maskptr, addr, error_handle;
struct mapinfo {
ulong cpu_flag;
char *name;
} mapinfo[] = {
{ POSSIBLE_MAP, "possible" },
{ PRESENT_MAP, "present" },
{ ONLINE_MAP, "online" },
{ ACTIVE_MAP, "active" },
};
if ((len = STRUCT_SIZE("cpumask_t")) < 0)
len = sizeof(ulong);
buf = GETBUF(len);
for (m = 0; m < sizeof(mapinfo)/sizeof(struct mapinfo); m++) {
if (!(addr = cpu_map_addr(mapinfo[m].name)))
continue;
error_handle = pc->flags & DEVMEM ? RETURN_ON_ERROR|QUIET : RETURN_ON_ERROR;
if (!readmem(addr, KVADDR, buf, len,
mapinfo[m].name, error_handle)) {
error(WARNING, "cannot read cpu_%s_map\n",
mapinfo[m].name);
continue;
}
maskptr = (ulong *)buf;
for (i = 0; i < (len/sizeof(ulong)); i++, maskptr++) {
if (*maskptr == 0)
continue;
for (c = 0; c < BITS_PER_LONG; c++)
if (*maskptr & (0x1UL << c)) {
cpu = (i * BITS_PER_LONG) + c;
if (cpu >= NR_CPUS) {
error(WARNING,
"cpu_%s_%s indicates more than"
" %d (NR_CPUS) cpus\n",
mapinfo[m].name,
cpu_map_type(mapinfo[m].name),
NR_CPUS);
break;
}
kt->cpu_flags[cpu] |= mapinfo[m].cpu_flag;
}
}
if (CRASHDEBUG(1)) {
fprintf(fp, "%scpu_%s_%s: cpus: ",
space(strlen("possible")-strlen(mapinfo[m].name)),
mapinfo[m].name, cpu_map_type(mapinfo[m].name));
for (i = c = 0; i < NR_CPUS; i++) {
if (kt->cpu_flags[i] & mapinfo[m].cpu_flag) {
fprintf(fp, "%d ", i);
c++;
}
}
fprintf(fp, "%s\n", c ? "" : "(none)");
}
}
FREEBUF(buf);
}
/*
* Determine whether a cpu is in one of the cpu masks.
*/
int
in_cpu_map(int map, int cpu)
{
if (cpu >= (kt->kernel_NR_CPUS ? kt->kernel_NR_CPUS : NR_CPUS)) {
error(INFO, "in_cpu_map: invalid cpu: %d\n", cpu);
return FALSE;
}
switch (map)
{
case POSSIBLE_MAP:
if (!cpu_map_addr("possible")) {
error(INFO, "cpu_possible_map does not exist\n");
return FALSE;
}
return (kt->cpu_flags[cpu] & POSSIBLE_MAP);