2 * Copyright (c) 2004 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/sysctl.h>
39 #include <readline/readline.h>
40 #include <readline/tilde.h>
43 #include <frame-unwind.h>
46 #include <gdbthread.h>
56 static void kgdb_core_cleanup(void *);
59 static struct target_ops kgdb_trgt_ops;
62 static char kvm_err[_POSIX2_LINE_MAX];
64 #define KERNOFF (kgdb_kernbase ())
65 #define INKERNEL(x) ((x) >= KERNOFF)
70 static CORE_ADDR kernbase;
71 struct minimal_symbol *sym;
74 sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
78 kernbase = SYMBOL_VALUE_ADDRESS (sym);
85 kgdb_trgt_open(char *filename, int from_tty)
87 struct cleanup *old_chain;
88 struct thread_info *ti;
94 target_preopen (from_tty);
96 error ("No vmcore file specified.");
98 error ("Can't open a vmcore without a kernel");
100 filename = tilde_expand (filename);
101 if (filename[0] != '/') {
102 temp = concat (current_directory, "/", filename, NULL);
107 old_chain = make_cleanup (xfree, filename);
109 nkvm = kvm_openfiles(bfd_get_filename(exec_bfd), filename, NULL,
110 write_files ? O_RDWR : O_RDONLY, kvm_err);
112 error ("Failed to open vmcore: %s", kvm_err);
114 /* Don't free the filename now and close any previous vmcore. */
115 discard_cleanups(old_chain);
116 unpush_target(&kgdb_trgt_ops);
120 old_chain = make_cleanup(kgdb_core_cleanup, NULL);
122 ontop = !push_target (&kgdb_trgt_ops);
123 discard_cleanups (old_chain);
128 kt = kgdb_thr_init();
130 ti = add_thread(pid_to_ptid(kt->tid));
131 kt = kgdb_thr_next(kt);
134 inferior_ptid = pid_to_ptid(curkthr->tid);
137 /* XXX: fetch registers? */
139 flush_cached_frames();
140 select_frame (get_current_frame());
141 print_stack_frame(get_selected_frame(),
142 frame_relative_level(get_selected_frame()), 1);
145 "you won't be able to access this vmcore until you terminate\n\
146 your %s; do ``info files''", target_longname);
150 kgdb_trgt_close(int quitting)
154 inferior_ptid = null_ptid;
156 if (kvm_close(kvm) != 0)
157 warning("cannot close \"%s\": %s", vmcore,
162 if (kgdb_trgt_ops.to_sections) {
163 xfree(kgdb_trgt_ops.to_sections);
164 kgdb_trgt_ops.to_sections = NULL;
165 kgdb_trgt_ops.to_sections_end = NULL;
171 kgdb_core_cleanup(void *arg)
178 kgdb_trgt_detach(char *args, int from_tty)
182 error ("Too many arguments");
183 unpush_target(&kgdb_trgt_ops);
184 reinit_frame_cache();
186 printf_filtered("No vmcore file now.\n");
190 kgdb_trgt_extra_thread_info(struct thread_info *ti)
193 return (kgdb_thr_extra_thread_info(ptid_get_pid(ti->ptid)));
197 kgdb_trgt_files_info(struct target_ops *target)
200 printf_filtered ("\t`%s', ", vmcore);
202 printf_filtered ("file type %s.\n", "FreeBSD kernel vmcore");
206 kgdb_trgt_find_new_threads(void)
208 struct target_ops *tb;
213 tb = find_target_beneath(&kgdb_trgt_ops);
214 if (tb->to_find_new_threads != NULL)
215 tb->to_find_new_threads();
219 kgdb_trgt_pid_to_str(ptid_t ptid)
223 snprintf(buf, sizeof(buf), "Thread %d", ptid_get_pid(ptid));
228 kgdb_trgt_thread_alive(ptid_t ptid)
230 return (kgdb_thr_lookup_tid(ptid_get_pid(ptid)) != NULL);
234 kgdb_trgt_xfer_memory(CORE_ADDR memaddr, char *myaddr, int len, int write,
235 struct mem_attrib *attrib, struct target_ops *target)
237 struct target_ops *tb;
243 return (kvm_read(kvm, memaddr, myaddr, len));
245 return (kvm_write(kvm, memaddr, myaddr, len));
247 tb = find_target_beneath(target);
248 return (tb->to_xfer_memory(memaddr, myaddr, len, write, attrib, tb));
252 kgdb_trgt_ignore_breakpoints(CORE_ADDR addr, char *contents)
259 kgdb_switch_to_thread(int tid)
264 thread_id = pid_to_thread_id(pid_to_ptid(tid));
266 error ("invalid tid");
267 snprintf(buf, sizeof(buf), "%d", thread_id);
268 gdb_thread_select(uiout, buf);
272 kgdb_set_proc_cmd (char *arg, int from_tty)
278 error_no_arg ("proc address for the new context");
281 error ("only supported for core file target");
283 addr = (CORE_ADDR) parse_and_eval_address (arg);
285 if (!INKERNEL (addr)) {
286 thr = kgdb_thr_lookup_pid((int)addr);
288 error ("invalid pid");
290 thr = kgdb_thr_lookup_paddr(addr);
292 error("invalid proc address");
294 kgdb_switch_to_thread(thr->tid);
298 kgdb_set_tid_cmd (char *arg, int from_tty)
304 error_no_arg ("TID or thread address for the new context");
306 addr = (CORE_ADDR) parse_and_eval_address (arg);
308 if (kvm != NULL && INKERNEL (addr)) {
309 thr = kgdb_thr_lookup_taddr(addr);
311 error("invalid thread address");
314 kgdb_switch_to_thread(addr);
317 int fbsdcoreops_suppress_target = 1;
320 initialize_kgdb_target(void)
323 kgdb_trgt_ops.to_magic = OPS_MAGIC;
324 kgdb_trgt_ops.to_shortname = "kernel";
325 kgdb_trgt_ops.to_longname = "kernel core dump file";
326 kgdb_trgt_ops.to_doc =
327 "Use a vmcore file as a target. Specify the filename of the vmcore file.";
328 kgdb_trgt_ops.to_stratum = core_stratum;
329 kgdb_trgt_ops.to_has_memory = 1;
330 kgdb_trgt_ops.to_has_registers = 1;
331 kgdb_trgt_ops.to_has_stack = 1;
333 kgdb_trgt_ops.to_open = kgdb_trgt_open;
334 kgdb_trgt_ops.to_close = kgdb_trgt_close;
335 kgdb_trgt_ops.to_attach = find_default_attach;
336 kgdb_trgt_ops.to_detach = kgdb_trgt_detach;
337 kgdb_trgt_ops.to_extra_thread_info = kgdb_trgt_extra_thread_info;
338 kgdb_trgt_ops.to_fetch_registers = kgdb_trgt_fetch_registers;
339 kgdb_trgt_ops.to_files_info = kgdb_trgt_files_info;
340 kgdb_trgt_ops.to_find_new_threads = kgdb_trgt_find_new_threads;
341 kgdb_trgt_ops.to_pid_to_str = kgdb_trgt_pid_to_str;
342 kgdb_trgt_ops.to_store_registers = kgdb_trgt_store_registers;
343 kgdb_trgt_ops.to_thread_alive = kgdb_trgt_thread_alive;
344 kgdb_trgt_ops.to_xfer_memory = kgdb_trgt_xfer_memory;
345 kgdb_trgt_ops.to_insert_breakpoint = kgdb_trgt_ignore_breakpoints;
346 kgdb_trgt_ops.to_remove_breakpoint = kgdb_trgt_ignore_breakpoints;
348 add_target(&kgdb_trgt_ops);
350 add_com ("proc", class_obscure, kgdb_set_proc_cmd,
351 "Set current process context");
352 add_com ("tid", class_obscure, kgdb_set_tid_cmd,
353 "Set current thread context");