396 lines
9.4 KiB
C
396 lines
9.4 KiB
C
/*
|
|
* Copyright (c) 2004 Marcel Moolenaar
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/user.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <kvm.h>
|
|
|
|
#include <defs.h>
|
|
#include <readline/readline.h>
|
|
#include <command.h>
|
|
#include <exec.h>
|
|
#include <frame-unwind.h>
|
|
#include <gdb.h>
|
|
#include <gdbcore.h>
|
|
#include <gdbthread.h>
|
|
#include <inferior.h>
|
|
#include <language.h>
|
|
#include <regcache.h>
|
|
#include <solib.h>
|
|
#include <target.h>
|
|
#include <ui-out.h>
|
|
|
|
#include "kgdb.h"
|
|
|
|
#ifdef CROSS_DEBUGGER
|
|
/*
|
|
* We suppress the call to add_target() of core_ops in corelow.c because if
|
|
* there are multiple core_stratum targets, the find_core_target() function
|
|
* won't know which one to return and returns none. We need it to return
|
|
* our target. We only have to do that when we're building a cross-debugger
|
|
* because fbsd-threads.c is part of a native debugger and it too defines
|
|
* coreops_suppress_target with 1 as the initializer.
|
|
*/
|
|
int coreops_suppress_target = 1;
|
|
#endif
|
|
|
|
static CORE_ADDR stoppcbs;
|
|
|
|
static void kgdb_core_cleanup(void *);
|
|
|
|
static char *vmcore;
|
|
static struct target_ops kgdb_trgt_ops;
|
|
|
|
kvm_t *kvm;
|
|
static char kvm_err[_POSIX2_LINE_MAX];
|
|
|
|
#define KERNOFF (kgdb_kernbase ())
|
|
#define PINKERNEL(x) ((x) >= KERNOFF)
|
|
|
|
static int
|
|
kgdb_resolve_symbol(const char *name, kvaddr_t *kva)
|
|
{
|
|
struct minimal_symbol *ms;
|
|
|
|
ms = lookup_minimal_symbol (name, NULL, NULL);
|
|
if (ms == NULL)
|
|
return (1);
|
|
|
|
*kva = SYMBOL_VALUE_ADDRESS (ms);
|
|
return (0);
|
|
}
|
|
|
|
static CORE_ADDR
|
|
kgdb_kernbase (void)
|
|
{
|
|
static CORE_ADDR kernbase;
|
|
struct minimal_symbol *sym;
|
|
|
|
if (kernbase == 0) {
|
|
sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
|
|
if (sym == NULL) {
|
|
kernbase = KERNBASE;
|
|
} else {
|
|
kernbase = SYMBOL_VALUE_ADDRESS (sym);
|
|
}
|
|
}
|
|
return kernbase;
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_open(char *filename, int from_tty)
|
|
{
|
|
struct cleanup *old_chain;
|
|
struct thread_info *ti;
|
|
struct kthr *kt;
|
|
kvm_t *nkvm;
|
|
char *temp;
|
|
int ontop;
|
|
|
|
target_preopen (from_tty);
|
|
if (!filename)
|
|
error ("No vmcore file specified.");
|
|
if (!exec_bfd)
|
|
error ("Can't open a vmcore without a kernel");
|
|
|
|
filename = tilde_expand (filename);
|
|
if (filename[0] != '/') {
|
|
temp = concat (current_directory, "/", filename, NULL);
|
|
xfree(filename);
|
|
filename = temp;
|
|
}
|
|
|
|
old_chain = make_cleanup (xfree, filename);
|
|
|
|
nkvm = kvm_open2(bfd_get_filename(exec_bfd), filename,
|
|
write_files ? O_RDWR : O_RDONLY, kvm_err, kgdb_resolve_symbol);
|
|
if (nkvm == NULL)
|
|
error ("Failed to open vmcore: %s", kvm_err);
|
|
|
|
/* Don't free the filename now and close any previous vmcore. */
|
|
discard_cleanups(old_chain);
|
|
unpush_target(&kgdb_trgt_ops);
|
|
|
|
kvm = nkvm;
|
|
vmcore = filename;
|
|
old_chain = make_cleanup(kgdb_core_cleanup, NULL);
|
|
|
|
ontop = !push_target (&kgdb_trgt_ops);
|
|
discard_cleanups (old_chain);
|
|
|
|
kgdb_dmesg();
|
|
|
|
init_thread_list();
|
|
kt = kgdb_thr_init();
|
|
while (kt != NULL) {
|
|
ti = add_thread(pid_to_ptid(kt->tid));
|
|
kt = kgdb_thr_next(kt);
|
|
}
|
|
if (curkthr != 0)
|
|
inferior_ptid = pid_to_ptid(curkthr->tid);
|
|
|
|
if (ontop) {
|
|
/* XXX: fetch registers? */
|
|
kld_init();
|
|
flush_cached_frames();
|
|
select_frame (get_current_frame());
|
|
print_stack_frame(get_selected_frame(),
|
|
frame_relative_level(get_selected_frame()), 1);
|
|
} else
|
|
warning(
|
|
"you won't be able to access this vmcore until you terminate\n\
|
|
your %s; do ``info files''", target_longname);
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_close(int quitting)
|
|
{
|
|
|
|
if (kvm != NULL) {
|
|
inferior_ptid = null_ptid;
|
|
CLEAR_SOLIB();
|
|
if (kvm_close(kvm) != 0)
|
|
warning("cannot close \"%s\": %s", vmcore,
|
|
kvm_geterr(kvm));
|
|
kvm = NULL;
|
|
xfree(vmcore);
|
|
vmcore = NULL;
|
|
if (kgdb_trgt_ops.to_sections) {
|
|
xfree(kgdb_trgt_ops.to_sections);
|
|
kgdb_trgt_ops.to_sections = NULL;
|
|
kgdb_trgt_ops.to_sections_end = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
kgdb_core_cleanup(void *arg)
|
|
{
|
|
|
|
kgdb_trgt_close(0);
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_detach(char *args, int from_tty)
|
|
{
|
|
|
|
if (args)
|
|
error ("Too many arguments");
|
|
unpush_target(&kgdb_trgt_ops);
|
|
reinit_frame_cache();
|
|
if (from_tty)
|
|
printf_filtered("No vmcore file now.\n");
|
|
}
|
|
|
|
static char *
|
|
kgdb_trgt_extra_thread_info(struct thread_info *ti)
|
|
{
|
|
|
|
return (kgdb_thr_extra_thread_info(ptid_get_pid(ti->ptid)));
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_files_info(struct target_ops *target)
|
|
{
|
|
|
|
printf_filtered ("\t`%s', ", vmcore);
|
|
wrap_here (" ");
|
|
printf_filtered ("file type %s.\n", "FreeBSD kernel vmcore");
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_find_new_threads(void)
|
|
{
|
|
struct target_ops *tb;
|
|
|
|
if (kvm != NULL)
|
|
return;
|
|
|
|
tb = find_target_beneath(&kgdb_trgt_ops);
|
|
if (tb->to_find_new_threads != NULL)
|
|
tb->to_find_new_threads();
|
|
}
|
|
|
|
static char *
|
|
kgdb_trgt_pid_to_str(ptid_t ptid)
|
|
{
|
|
static char buf[33];
|
|
|
|
snprintf(buf, sizeof(buf), "Thread %d", ptid_get_pid(ptid));
|
|
return (buf);
|
|
}
|
|
|
|
static int
|
|
kgdb_trgt_thread_alive(ptid_t ptid)
|
|
{
|
|
return (kgdb_thr_lookup_tid(ptid_get_pid(ptid)) != NULL);
|
|
}
|
|
|
|
static int
|
|
kgdb_trgt_xfer_memory(CORE_ADDR memaddr, char *myaddr, int len, int write,
|
|
struct mem_attrib *attrib, struct target_ops *target)
|
|
{
|
|
struct target_ops *tb;
|
|
|
|
if (kvm != NULL) {
|
|
if (len == 0)
|
|
return (0);
|
|
if (!write)
|
|
return (kvm_read2(kvm, memaddr, myaddr, len));
|
|
else
|
|
return (kvm_write(kvm, memaddr, myaddr, len));
|
|
}
|
|
tb = find_target_beneath(target);
|
|
return (tb->to_xfer_memory(memaddr, myaddr, len, write, attrib, tb));
|
|
}
|
|
|
|
static int
|
|
kgdb_trgt_ignore_breakpoints(CORE_ADDR addr, char *contents)
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
kgdb_switch_to_thread(int tid)
|
|
{
|
|
char buf[16];
|
|
int thread_id;
|
|
|
|
thread_id = pid_to_thread_id(pid_to_ptid(tid));
|
|
if (thread_id == 0)
|
|
error ("invalid tid");
|
|
snprintf(buf, sizeof(buf), "%d", thread_id);
|
|
gdb_thread_select(uiout, buf);
|
|
}
|
|
|
|
static void
|
|
kgdb_set_proc_cmd (char *arg, int from_tty)
|
|
{
|
|
CORE_ADDR addr;
|
|
struct kthr *thr;
|
|
|
|
if (!arg)
|
|
error_no_arg ("proc address for the new context");
|
|
|
|
if (kvm == NULL)
|
|
error ("only supported for core file target");
|
|
|
|
addr = (CORE_ADDR) parse_and_eval_address (arg);
|
|
|
|
if (!PINKERNEL (addr)) {
|
|
thr = kgdb_thr_lookup_pid((int)addr);
|
|
if (thr == NULL)
|
|
error ("invalid pid");
|
|
} else {
|
|
thr = kgdb_thr_lookup_paddr(addr);
|
|
if (thr == NULL)
|
|
error("invalid proc address");
|
|
}
|
|
kgdb_switch_to_thread(thr->tid);
|
|
}
|
|
|
|
static void
|
|
kgdb_set_tid_cmd (char *arg, int from_tty)
|
|
{
|
|
CORE_ADDR addr;
|
|
struct kthr *thr;
|
|
|
|
if (!arg)
|
|
error_no_arg ("TID or thread address for the new context");
|
|
|
|
addr = (CORE_ADDR) parse_and_eval_address (arg);
|
|
|
|
if (kvm != NULL && PINKERNEL (addr)) {
|
|
thr = kgdb_thr_lookup_taddr(addr);
|
|
if (thr == NULL)
|
|
error("invalid thread address");
|
|
addr = thr->tid;
|
|
}
|
|
kgdb_switch_to_thread(addr);
|
|
}
|
|
|
|
int fbsdcoreops_suppress_target = 1;
|
|
|
|
void
|
|
initialize_kgdb_target(void)
|
|
{
|
|
|
|
kgdb_trgt_ops.to_magic = OPS_MAGIC;
|
|
kgdb_trgt_ops.to_shortname = "kernel";
|
|
kgdb_trgt_ops.to_longname = "kernel core dump file";
|
|
kgdb_trgt_ops.to_doc =
|
|
"Use a vmcore file as a target. Specify the filename of the vmcore file.";
|
|
kgdb_trgt_ops.to_stratum = core_stratum;
|
|
kgdb_trgt_ops.to_has_memory = 1;
|
|
kgdb_trgt_ops.to_has_registers = 1;
|
|
kgdb_trgt_ops.to_has_stack = 1;
|
|
|
|
kgdb_trgt_ops.to_open = kgdb_trgt_open;
|
|
kgdb_trgt_ops.to_close = kgdb_trgt_close;
|
|
kgdb_trgt_ops.to_attach = find_default_attach;
|
|
kgdb_trgt_ops.to_detach = kgdb_trgt_detach;
|
|
kgdb_trgt_ops.to_extra_thread_info = kgdb_trgt_extra_thread_info;
|
|
kgdb_trgt_ops.to_fetch_registers = kgdb_trgt_fetch_registers;
|
|
kgdb_trgt_ops.to_files_info = kgdb_trgt_files_info;
|
|
kgdb_trgt_ops.to_find_new_threads = kgdb_trgt_find_new_threads;
|
|
kgdb_trgt_ops.to_pid_to_str = kgdb_trgt_pid_to_str;
|
|
kgdb_trgt_ops.to_store_registers = kgdb_trgt_store_registers;
|
|
kgdb_trgt_ops.to_thread_alive = kgdb_trgt_thread_alive;
|
|
kgdb_trgt_ops.to_xfer_memory = kgdb_trgt_xfer_memory;
|
|
kgdb_trgt_ops.to_insert_breakpoint = kgdb_trgt_ignore_breakpoints;
|
|
kgdb_trgt_ops.to_remove_breakpoint = kgdb_trgt_ignore_breakpoints;
|
|
|
|
add_target(&kgdb_trgt_ops);
|
|
|
|
add_com ("proc", class_obscure, kgdb_set_proc_cmd,
|
|
"Set current process context");
|
|
add_com ("tid", class_obscure, kgdb_set_tid_cmd,
|
|
"Set current thread context");
|
|
}
|
|
|
|
CORE_ADDR
|
|
kgdb_trgt_stop_pcb(u_int cpuid, u_int pcbsz)
|
|
{
|
|
static int once = 0;
|
|
|
|
if (stoppcbs == 0 && !once) {
|
|
once = 1;
|
|
stoppcbs = kgdb_lookup("stoppcbs");
|
|
}
|
|
if (stoppcbs == 0)
|
|
return 0;
|
|
|
|
return (stoppcbs + pcbsz * cpuid);
|
|
}
|