1 /* Low level interface for debugging HPUX/DCE threads for GDB, the GNU
4 Copyright (C) 1996, 1998, 1999, 2000, 2001, 2004, 2007
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* This module implements a sort of half target that sits between the
23 machine-independent parts of GDB and the ptrace interface (infptrace.c) to
24 provide access to the HPUX user-mode thread implementation.
26 HPUX threads are true user-mode threads, which are invoked via the cma_*
27 and pthread_* (DCE and Posix respectivly) interfaces. These are mostly
28 implemented in user-space, with all thread context kept in various
29 structures that live in the user's heap. For the most part, the kernel has
30 no knowlege of these threads.
36 #define _CMA_NOWRAPPERS_
38 #include <cma_tcb_defs.h>
39 #include <cma_deb_core.h>
40 #include "gdbthread.h"
48 #include "hppa-tdep.h"
51 extern int child_suppress_run
;
53 extern void _initialize_hpux_thread (void);
61 static int hpux_thread_active
= 0;
63 static ptid_t main_ptid
; /* Real process ID */
65 static CORE_ADDR P_cma__g_known_threads
;
66 static CORE_ADDR P_cma__g_current_thread
;
68 static void hpux_thread_resume (ptid_t ptid
, int step
,
69 enum target_signal signo
);
71 static void init_hpux_thread_ops (void);
73 static struct target_ops hpux_thread_ops
;
75 static ptid_t
find_active_thread (void);
77 static int cached_thread
;
78 static cma__t_int_tcb cached_tcb
;
81 find_active_thread (void)
83 static cma__t_int_tcb tcb
;
86 read_memory ((CORE_ADDR
) P_cma__g_current_thread
,
90 read_memory (tcb_ptr
, (char *) &tcb
, sizeof tcb
);
92 return (ptid_build (PIDGET (main_ptid
), 0,
93 cma_thread_get_unique (&tcb
.prolog
.client_thread
)));
96 static cma__t_int_tcb
*find_tcb (ptid_t ptid
);
98 static cma__t_int_tcb
*
99 find_tcb (ptid_t ptid
)
101 cma__t_known_object queue_header
;
102 cma__t_queue
*queue_ptr
;
103 int thread
= ptid_get_tid (ptid
);
105 if (thread
== cached_thread
)
108 read_memory ((CORE_ADDR
) P_cma__g_known_threads
,
109 (char *) &queue_header
,
110 sizeof queue_header
);
112 for (queue_ptr
= queue_header
.queue
.flink
;
113 queue_ptr
!= (cma__t_queue
*) P_cma__g_known_threads
;
114 queue_ptr
= cached_tcb
.threads
.flink
)
116 cma__t_int_tcb
*tcb_ptr
;
118 tcb_ptr
= cma__base (queue_ptr
, threads
, cma__t_int_tcb
);
120 read_memory ((CORE_ADDR
) tcb_ptr
, (char *) &cached_tcb
, sizeof cached_tcb
);
122 if (cached_tcb
.header
.type
== cma__c_obj_tcb
)
123 if (cma_thread_get_unique (&cached_tcb
.prolog
.client_thread
) == thread
)
125 cached_thread
= thread
;
130 error (_("Can't find TCB %d"), thread
);
134 /* Most target vector functions from here on actually just pass through to
135 inftarg.c, as they don't need to do anything specific for threads. */
138 hpux_thread_open (char *arg
, int from_tty
)
140 deprecated_child_ops
.to_open (arg
, from_tty
);
143 /* Attach to process PID, then initialize for debugging it
144 and wait for the trace-trap that results from attaching. */
147 hpux_thread_attach (char *args
, int from_tty
)
149 deprecated_child_ops
.to_attach (args
, from_tty
);
151 /* XXX - might want to iterate over all the threads and register them. */
154 /* Take a program previously attached to and detaches it.
155 The program resumes execution and will no longer stop
156 on signals, etc. We'd better not have left any breakpoints
157 in the program or it'll die when it hits one. For this
158 to work, it may be necessary for the process to have been
159 previously attached. It *might* work if the program was
160 started via the normal ptrace (PTRACE_TRACEME). */
163 hpux_thread_detach (char *args
, int from_tty
)
165 deprecated_child_ops
.to_detach (args
, from_tty
);
168 /* Resume execution of process PID. If STEP is nozero, then
169 just single step it. If SIGNAL is nonzero, restart it with that
170 signal activated. We may have to convert pid from a thread-id to an LWP id
174 hpux_thread_resume (ptid_t ptid
, int step
, enum target_signal signo
)
176 struct cleanup
*old_chain
;
178 old_chain
= save_inferior_ptid ();
181 inferior_ptid
= main_ptid
;
186 pid
= thread_to_lwp (pid
, -2);
187 if (pid
== -2) /* Inactive thread */
188 error (_("This version of Solaris can't start inactive threads."));
192 deprecated_child_ops
.to_resume (ptid
, step
, signo
);
196 do_cleanups (old_chain
);
199 /* Wait for any threads to stop. We may have to convert PID from a thread id
200 to a LWP id, and vice versa on the way out. */
203 hpux_thread_wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
)
206 struct cleanup
*old_chain
;
208 old_chain
= save_inferior_ptid ();
210 inferior_ptid
= main_ptid
;
212 if (!ptid_equal (ptid
, minus_one_ptid
))
215 rtnval
= deprecated_child_ops
.to_wait (ptid
, ourstatus
);
217 rtnval
= find_active_thread ();
219 do_cleanups (old_chain
);
224 static char regmap
[] =
226 -2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
227 28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
228 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
230 /* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
231 -2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
233 /* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
234 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
236 /* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
237 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
239 -1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
240 144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
241 -1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
242 -1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
243 136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
244 104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
245 72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
246 -1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
247 -1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
251 hpux_thread_fetch_registers (struct regcache
*regcache
, int regno
)
253 cma__t_int_tcb tcb
, *tcb_ptr
;
254 struct cleanup
*old_chain
;
256 int first_regno
, last_regno
;
258 tcb_ptr
= find_tcb (inferior_ptid
);
260 old_chain
= save_inferior_ptid ();
262 inferior_ptid
= main_ptid
;
264 if (tcb_ptr
->state
== cma__c_state_running
)
266 deprecated_child_ops
.to_fetch_registers (regcache
, regno
);
268 do_cleanups (old_chain
);
276 last_regno
= gdbarch_num_regs (current_gdbarch
) - 1;
284 for (regno
= first_regno
; regno
<= last_regno
; regno
++)
286 if (regmap
[regno
] == -1)
287 deprecated_child_ops
.to_fetch_registers (regcache
, regno
);
290 unsigned char buf
[MAX_REGISTER_SIZE
];
293 sp
= (CORE_ADDR
) tcb_ptr
->static_ctx
.sp
- 160;
295 if (regno
== HPPA_FLAGS_REGNUM
)
296 /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
297 memset (buf
, '\000', register_size (current_gdbarch
, regno
));
298 else if (regno
== HPPA_SP_REGNUM
)
299 store_unsigned_integer (buf
, sizeof sp
, sp
);
300 else if (regno
== HPPA_PCOQ_HEAD_REGNUM
)
301 read_memory (sp
- 20, buf
, register_size (current_gdbarch
, regno
));
303 read_memory (sp
+ regmap
[regno
], buf
, register_size (current_gdbarch
, regno
));
305 regcache_raw_supply (regcache
, regno
, buf
);
309 do_cleanups (old_chain
);
313 hpux_thread_store_registers (struct regcache
*regcache
, int regno
)
315 cma__t_int_tcb tcb
, *tcb_ptr
;
316 struct cleanup
*old_chain
;
318 int first_regno
, last_regno
;
320 tcb_ptr
= find_tcb (inferior_ptid
);
322 old_chain
= save_inferior_ptid ();
324 inferior_ptid
= main_ptid
;
326 if (tcb_ptr
->state
== cma__c_state_running
)
328 deprecated_child_ops
.to_store_registers (regcache
, regno
);
330 do_cleanups (old_chain
);
338 last_regno
= gdbarch_num_regs (current_gdbarch
) - 1;
346 for (regno
= first_regno
; regno
<= last_regno
; regno
++)
348 if (regmap
[regno
] == -1)
349 deprecated_child_ops
.to_store_registers (regcache
, regno
);
352 unsigned char buf
[MAX_REGISTER_SIZE
];
355 sp
= (CORE_ADDR
) tcb_ptr
->static_ctx
.sp
- 160;
357 if (regno
== HPPA_FLAGS_REGNUM
)
358 deprecated_child_ops
.to_store_registers (regcache
, regno
); /* Let lower layer handle this... */
359 else if (regno
== HPPA_SP_REGNUM
)
361 regcache_raw_collect (regcache
, regno
, buf
);
362 write_memory ((CORE_ADDR
) &tcb_ptr
->static_ctx
.sp
, buf
,
363 register_size (current_gdbarch
, regno
));
364 tcb_ptr
->static_ctx
.sp
365 = (cma__t_hppa_regs
*) ((CORE_ADDR
) buf
+ 160);
367 else if (regno
== HPPA_PCOQ_HEAD_REGNUM
)
369 regcache_raw_collect (regcache
, regno
, buf
);
370 write_memory (sp
- 20, buf
,
371 register_size (current_gdbarch
, regno
));
375 regcache_raw_collect (regcache
, regno
, buf
);
376 write_memory (sp
+ regmap
[regno
], buf
,
377 register_size (current_gdbarch
, regno
));
382 do_cleanups (old_chain
);
385 /* Get ready to modify the registers array. On machines which store
386 individual registers, this doesn't need to do anything. On machines
387 which store all the registers in one fell swoop, this makes sure
388 that registers contains all the registers from the program being
392 hpux_thread_prepare_to_store (struct regcache
*regcache
)
394 deprecated_child_ops
.to_prepare_to_store (regcache
);
398 hpux_thread_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
,
399 int dowrite
, struct mem_attrib
*attribs
,
400 struct target_ops
*target
)
403 struct cleanup
*old_chain
;
405 old_chain
= save_inferior_ptid ();
407 inferior_ptid
= main_ptid
;
410 deprecated_child_ops
.deprecated_xfer_memory (memaddr
, myaddr
, len
, dowrite
, attribs
, target
);
412 do_cleanups (old_chain
);
417 /* Print status information about what we're accessing. */
420 hpux_thread_files_info (struct target_ops
*ignore
)
422 deprecated_child_ops
.to_files_info (ignore
);
426 hpux_thread_kill_inferior (void)
428 deprecated_child_ops
.to_kill ();
432 hpux_thread_notice_signals (ptid_t ptid
)
434 deprecated_child_ops
.to_notice_signals (ptid
);
437 /* Fork an inferior process, and start debugging it with /proc. */
440 hpux_thread_create_inferior (char *exec_file
, char *allargs
, char **env
,
443 deprecated_child_ops
.to_create_inferior (exec_file
, allargs
, env
, from_tty
);
445 if (hpux_thread_active
)
447 main_ptid
= inferior_ptid
;
449 push_target (&hpux_thread_ops
);
451 inferior_ptid
= find_active_thread ();
453 add_thread (inferior_ptid
);
457 /* This routine is called whenever a new symbol table is read in, or when all
458 symbol tables are removed. libthread_db can only be initialized when it
459 finds the right variables in libthread.so. Since it's a shared library,
460 those variables don't show up until the library gets mapped and the symbol
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;
491 /* Clean up after the inferior dies. */
494 hpux_thread_mourn_inferior (void)
496 deprecated_child_ops
.to_mourn_inferior ();
499 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
502 hpux_thread_can_run (void)
504 return child_suppress_run
;
508 hpux_thread_alive (ptid_t ptid
)
514 hpux_thread_stop (void)
516 deprecated_child_ops
.to_stop ();
519 /* Convert a pid to printable form. */
522 hpux_pid_to_str (ptid_t ptid
)
524 static char buf
[100];
525 int pid
= PIDGET (ptid
);
527 sprintf (buf
, "Thread %ld", ptid_get_tid (ptid
));
533 init_hpux_thread_ops (void)
535 hpux_thread_ops
.to_shortname
= "hpux-threads";
536 hpux_thread_ops
.to_longname
= "HPUX threads and pthread.";
537 hpux_thread_ops
.to_doc
= "HPUX threads and pthread support.";
538 hpux_thread_ops
.to_open
= hpux_thread_open
;
539 hpux_thread_ops
.to_attach
= hpux_thread_attach
;
540 hpux_thread_ops
.to_detach
= hpux_thread_detach
;
541 hpux_thread_ops
.to_resume
= hpux_thread_resume
;
542 hpux_thread_ops
.to_wait
= hpux_thread_wait
;
543 hpux_thread_ops
.to_fetch_registers
= hpux_thread_fetch_registers
;
544 hpux_thread_ops
.to_store_registers
= hpux_thread_store_registers
;
545 hpux_thread_ops
.to_prepare_to_store
= hpux_thread_prepare_to_store
;
546 hpux_thread_ops
.deprecated_xfer_memory
= hpux_thread_xfer_memory
;
547 hpux_thread_ops
.to_files_info
= hpux_thread_files_info
;
548 hpux_thread_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
549 hpux_thread_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
550 hpux_thread_ops
.to_terminal_init
= terminal_init_inferior
;
551 hpux_thread_ops
.to_terminal_inferior
= terminal_inferior
;
552 hpux_thread_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
553 hpux_thread_ops
.to_terminal_save_ours
= terminal_save_ours
;
554 hpux_thread_ops
.to_terminal_ours
= terminal_ours
;
555 hpux_thread_ops
.to_terminal_info
= child_terminal_info
;
556 hpux_thread_ops
.to_kill
= hpux_thread_kill_inferior
;
557 hpux_thread_ops
.to_create_inferior
= hpux_thread_create_inferior
;
558 hpux_thread_ops
.to_mourn_inferior
= hpux_thread_mourn_inferior
;
559 hpux_thread_ops
.to_can_run
= hpux_thread_can_run
;
560 hpux_thread_ops
.to_notice_signals
= hpux_thread_notice_signals
;
561 hpux_thread_ops
.to_thread_alive
= hpux_thread_alive
;
562 hpux_thread_ops
.to_stop
= hpux_thread_stop
;
563 hpux_thread_ops
.to_stratum
= process_stratum
;
564 hpux_thread_ops
.to_has_all_memory
= 1;
565 hpux_thread_ops
.to_has_memory
= 1;
566 hpux_thread_ops
.to_has_stack
= 1;
567 hpux_thread_ops
.to_has_registers
= 1;
568 hpux_thread_ops
.to_has_execution
= 1;
569 hpux_thread_ops
.to_magic
= OPS_MAGIC
;
573 _initialize_hpux_thread (void)
575 init_hpux_thread_ops ();
576 add_target (&hpux_thread_ops
);
578 child_suppress_run
= 1;
579 /* Hook into new_objfile notification. */
580 observer_attach_new_objfile (hpux_thread_new_objfile
);