1 /* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger.
2 Copyright 1996, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This module implements a sort of half target that sits between the
22 machine-independent parts of GDB and the ptrace interface (infptrace.c) to
23 provide access to the HPUX user-mode thread implementation.
25 HPUX threads are true user-mode threads, which are invoked via the cma_*
26 and pthread_* (DCE and Posix respectivly) interfaces. These are mostly
27 implemented in user-space, with all thread context kept in various
28 structures that live in the user's heap. For the most part, the kernel has
29 no knowlege of these threads.
35 #define _CMA_NOWRAPPERS_
37 #include <cma_tcb_defs.h>
38 #include <cma_deb_core.h>
39 #include "gdbthread.h"
47 extern int child_suppress_run;
48 extern struct target_ops child_ops; /* target vector for inftarg.c */
50 extern void _initialize_hpux_thread (void);
58 static int hpux_thread_active = 0;
60 static ptid_t main_ptid; /* Real process ID */
62 static CORE_ADDR P_cma__g_known_threads;
63 static CORE_ADDR P_cma__g_current_thread;
65 static void hpux_thread_resume (ptid_t ptid, int step,
66 enum target_signal signo);
68 static void init_hpux_thread_ops (void);
70 static struct target_ops hpux_thread_ops;
72 static ptid_t find_active_thread (void);
74 static int cached_thread;
75 static cma__t_int_tcb cached_tcb;
78 find_active_thread (void)
80 static cma__t_int_tcb tcb;
83 read_memory ((CORE_ADDR) P_cma__g_current_thread,
87 read_memory (tcb_ptr, (char *) &tcb, sizeof tcb);
89 return (ptid_build (PIDGET (main_ptid), 0,
90 cma_thread_get_unique (&tcb.prolog.client_thread)));
93 static cma__t_int_tcb *find_tcb (ptid_t ptid);
95 static cma__t_int_tcb *
96 find_tcb (ptid_t ptid)
98 cma__t_known_object queue_header;
99 cma__t_queue *queue_ptr;
100 int thread = ptid_get_tid (ptid);
102 if (thread == cached_thread)
105 read_memory ((CORE_ADDR) P_cma__g_known_threads,
106 (char *) &queue_header,
107 sizeof queue_header);
109 for (queue_ptr = queue_header.queue.flink;
110 queue_ptr != (cma__t_queue *) P_cma__g_known_threads;
111 queue_ptr = cached_tcb.threads.flink)
113 cma__t_int_tcb *tcb_ptr;
115 tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb);
117 read_memory ((CORE_ADDR) tcb_ptr, (char *) &cached_tcb, sizeof cached_tcb);
119 if (cached_tcb.header.type == cma__c_obj_tcb)
120 if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread)
122 cached_thread = thread;
127 error ("Can't find TCB %d", thread);
131 /* Most target vector functions from here on actually just pass through to
132 inftarg.c, as they don't need to do anything specific for threads. */
135 hpux_thread_open (char *arg, int from_tty)
137 child_ops.to_open (arg, from_tty);
140 /* Attach to process PID, then initialize for debugging it
141 and wait for the trace-trap that results from attaching. */
144 hpux_thread_attach (char *args, int from_tty)
146 child_ops.to_attach (args, from_tty);
148 /* XXX - might want to iterate over all the threads and register them. */
151 /* Take a program previously attached to and detaches it.
152 The program resumes execution and will no longer stop
153 on signals, etc. We'd better not have left any breakpoints
154 in the program or it'll die when it hits one. For this
155 to work, it may be necessary for the process to have been
156 previously attached. It *might* work if the program was
157 started via the normal ptrace (PTRACE_TRACEME). */
160 hpux_thread_detach (char *args, int from_tty)
162 child_ops.to_detach (args, from_tty);
165 /* Resume execution of process PID. If STEP is nozero, then
166 just single step it. If SIGNAL is nonzero, restart it with that
167 signal activated. We may have to convert pid from a thread-id to an LWP id
171 hpux_thread_resume (ptid_t ptid, int step, enum target_signal signo)
173 struct cleanup *old_chain;
175 old_chain = save_inferior_ptid ();
178 inferior_ptid = main_ptid;
183 pid = thread_to_lwp (pid, -2);
184 if (pid == -2) /* Inactive thread */
185 error ("This version of Solaris can't start inactive threads.");
189 child_ops.to_resume (ptid, step, signo);
193 do_cleanups (old_chain);
196 /* Wait for any threads to stop. We may have to convert PID from a thread id
197 to a LWP id, and vice versa on the way out. */
200 hpux_thread_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
203 struct cleanup *old_chain;
205 old_chain = save_inferior_ptid ();
207 inferior_ptid = main_ptid;
209 if (!ptid_equal (ptid, minus_one_ptid))
212 rtnval = child_ops.to_wait (ptid, ourstatus);
214 rtnval = find_active_thread ();
216 do_cleanups (old_chain);
221 static char regmap[NUM_REGS] =
223 -2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
224 28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
225 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
227 /* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
228 -2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
230 /* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
231 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
233 /* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
234 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
236 -1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
237 144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
238 -1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
239 -1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
240 136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
241 104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
242 72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
243 -1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
244 -1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
248 hpux_thread_fetch_registers (int regno)
250 cma__t_int_tcb tcb, *tcb_ptr;
251 struct cleanup *old_chain;
253 int first_regno, last_regno;
255 tcb_ptr = find_tcb (inferior_ptid);
257 old_chain = save_inferior_ptid ();
259 inferior_ptid = main_ptid;
261 if (tcb_ptr->state == cma__c_state_running)
263 child_ops.to_fetch_registers (regno);
265 do_cleanups (old_chain);
273 last_regno = NUM_REGS - 1;
281 for (regno = first_regno; regno <= last_regno; regno++)
283 if (regmap[regno] == -1)
284 child_ops.to_fetch_registers (regno);
287 unsigned char buf[MAX_REGISTER_SIZE];
290 sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160;
292 if (regno == FLAGS_REGNUM)
293 /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
294 memset (buf, '\000', DEPRECATED_REGISTER_RAW_SIZE (regno));
295 else if (regno == SP_REGNUM)
296 store_unsigned_integer (buf, sizeof sp, sp);
297 else if (regno == PC_REGNUM)
298 read_memory (sp - 20, buf, DEPRECATED_REGISTER_RAW_SIZE (regno));
300 read_memory (sp + regmap[regno], buf, DEPRECATED_REGISTER_RAW_SIZE (regno));
302 supply_register (regno, buf);
306 do_cleanups (old_chain);
310 hpux_thread_store_registers (int regno)
312 cma__t_int_tcb tcb, *tcb_ptr;
313 struct cleanup *old_chain;
315 int first_regno, last_regno;
317 tcb_ptr = find_tcb (inferior_ptid);
319 old_chain = save_inferior_ptid ();
321 inferior_ptid = main_ptid;
323 if (tcb_ptr->state == cma__c_state_running)
325 child_ops.to_store_registers (regno);
327 do_cleanups (old_chain);
335 last_regno = NUM_REGS - 1;
343 for (regno = first_regno; regno <= last_regno; regno++)
345 if (regmap[regno] == -1)
346 child_ops.to_store_registers (regno);
349 unsigned char buf[MAX_REGISTER_SIZE];
352 sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160;
354 if (regno == FLAGS_REGNUM)
355 child_ops.to_store_registers (regno); /* Let lower layer handle this... */
356 else if (regno == SP_REGNUM)
358 write_memory ((CORE_ADDR) & tcb_ptr->static_ctx.sp,
359 &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)],
360 DEPRECATED_REGISTER_RAW_SIZE (regno));
361 tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *)
362 (extract_unsigned_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)],
363 DEPRECATED_REGISTER_RAW_SIZE (regno)) + 160);
365 else if (regno == PC_REGNUM)
366 write_memory (sp - 20,
367 &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)],
368 DEPRECATED_REGISTER_RAW_SIZE (regno));
370 write_memory (sp + regmap[regno],
371 &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)],
372 DEPRECATED_REGISTER_RAW_SIZE (regno));
376 do_cleanups (old_chain);
379 /* Get ready to modify the registers array. On machines which store
380 individual registers, this doesn't need to do anything. On machines
381 which store all the registers in one fell swoop, this makes sure
382 that registers contains all the registers from the program being
386 hpux_thread_prepare_to_store (void)
388 child_ops.to_prepare_to_store ();
392 hpux_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
393 int dowrite, struct mem_attrib *attribs,
394 struct target_ops *target)
397 struct cleanup *old_chain;
399 old_chain = save_inferior_ptid ();
401 inferior_ptid = main_ptid;
404 child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, attribs, target);
406 do_cleanups (old_chain);
411 /* Print status information about what we're accessing. */
414 hpux_thread_files_info (struct target_ops *ignore)
416 child_ops.to_files_info (ignore);
420 hpux_thread_kill_inferior (void)
422 child_ops.to_kill ();
426 hpux_thread_notice_signals (ptid_t ptid)
428 child_ops.to_notice_signals (ptid);
431 /* Fork an inferior process, and start debugging it with /proc. */
434 hpux_thread_create_inferior (char *exec_file, char *allargs, char **env)
436 child_ops.to_create_inferior (exec_file, allargs, env);
438 if (hpux_thread_active)
440 main_ptid = inferior_ptid;
442 push_target (&hpux_thread_ops);
444 inferior_ptid = find_active_thread ();
446 add_thread (inferior_ptid);
450 /* This routine is called whenever a new symbol table is read in, or when all
451 symbol tables are removed. libthread_db can only be initialized when it
452 finds the right variables in libthread.so. Since it's a shared library,
453 those variables don't show up until the library gets mapped and the symbol
456 /* This new_objfile event is now managed by a chained function pointer.
457 * It is the callee's responsability to call the next client on the chain.
460 /* Saved pointer to previous owner of the new_objfile event. */
461 static void (*target_new_objfile_chain) (struct objfile *);
464 hpux_thread_new_objfile (struct objfile *objfile)
466 struct minimal_symbol *ms;
470 hpux_thread_active = 0;
474 ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile);
479 P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms);
481 ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile);
486 P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms);
488 hpux_thread_active = 1;
490 /* Call predecessor on chain, if any. */
491 if (target_new_objfile_chain)
492 target_new_objfile_chain (objfile);
495 /* Clean up after the inferior dies. */
498 hpux_thread_mourn_inferior (void)
500 child_ops.to_mourn_inferior ();
503 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
506 hpux_thread_can_run (void)
508 return child_suppress_run;
512 hpux_thread_alive (ptid_t ptid)
518 hpux_thread_stop (void)
520 child_ops.to_stop ();
523 /* Convert a pid to printable form. */
526 hpux_pid_to_str (ptid_t ptid)
528 static char buf[100];
529 int pid = PIDGET (ptid);
531 sprintf (buf, "Thread %ld", ptid_get_tid (ptid));
537 init_hpux_thread_ops (void)
539 hpux_thread_ops.to_shortname = "hpux-threads";
540 hpux_thread_ops.to_longname = "HPUX threads and pthread.";
541 hpux_thread_ops.to_doc = "HPUX threads and pthread support.";
542 hpux_thread_ops.to_open = hpux_thread_open;
543 hpux_thread_ops.to_attach = hpux_thread_attach;
544 hpux_thread_ops.to_detach = hpux_thread_detach;
545 hpux_thread_ops.to_resume = hpux_thread_resume;
546 hpux_thread_ops.to_wait = hpux_thread_wait;
547 hpux_thread_ops.to_fetch_registers = hpux_thread_fetch_registers;
548 hpux_thread_ops.to_store_registers = hpux_thread_store_registers;
549 hpux_thread_ops.to_prepare_to_store = hpux_thread_prepare_to_store;
550 hpux_thread_ops.to_xfer_memory = hpux_thread_xfer_memory;
551 hpux_thread_ops.to_files_info = hpux_thread_files_info;
552 hpux_thread_ops.to_insert_breakpoint = memory_insert_breakpoint;
553 hpux_thread_ops.to_remove_breakpoint = memory_remove_breakpoint;
554 hpux_thread_ops.to_terminal_init = terminal_init_inferior;
555 hpux_thread_ops.to_terminal_inferior = terminal_inferior;
556 hpux_thread_ops.to_terminal_ours_for_output = terminal_ours_for_output;
557 hpux_thread_ops.to_terminal_save_ours = terminal_save_ours;
558 hpux_thread_ops.to_terminal_ours = terminal_ours;
559 hpux_thread_ops.to_terminal_info = child_terminal_info;
560 hpux_thread_ops.to_kill = hpux_thread_kill_inferior;
561 hpux_thread_ops.to_create_inferior = hpux_thread_create_inferior;
562 hpux_thread_ops.to_mourn_inferior = hpux_thread_mourn_inferior;
563 hpux_thread_ops.to_can_run = hpux_thread_can_run;
564 hpux_thread_ops.to_notice_signals = hpux_thread_notice_signals;
565 hpux_thread_ops.to_thread_alive = hpux_thread_alive;
566 hpux_thread_ops.to_stop = hpux_thread_stop;
567 hpux_thread_ops.to_stratum = process_stratum;
568 hpux_thread_ops.to_has_all_memory = 1;
569 hpux_thread_ops.to_has_memory = 1;
570 hpux_thread_ops.to_has_stack = 1;
571 hpux_thread_ops.to_has_registers = 1;
572 hpux_thread_ops.to_has_execution = 1;
573 hpux_thread_ops.to_magic = OPS_MAGIC;
577 _initialize_hpux_thread (void)
579 init_hpux_thread_ops ();
580 add_target (&hpux_thread_ops);
582 child_suppress_run = 1;
583 /* Hook into new_objfile notification. */
584 target_new_objfile_chain = target_new_objfile_hook;
585 target_new_objfile_hook = hpux_thread_new_objfile;