1 /* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger.
2 Copyright 1996 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, Boston, MA 02111-1307, USA. */
20 /* This module implements a sort of half target that sits between the
21 machine-independent parts of GDB and the ptrace interface (infptrace.c) to
22 provide access to the HPUX user-mode thread implementation.
24 HPUX threads are true user-mode threads, which are invoked via the cma_*
25 and pthread_* (DCE and Posix respectivly) interfaces. These are mostly
26 implemented in user-space, with all thread context kept in various
27 structures that live in the user's heap. For the most part, the kernel has
28 no knowlege of these threads.
34 #define _CMA_NOWRAPPERS_
36 #include <cma_tcb_defs.h>
37 #include <cma_deb_core.h>
38 #include "gdbthread.h"
46 extern struct target_ops hpux_thread_ops; /* Forward declaration */
48 extern int child_suppress_run;
49 extern struct target_ops child_ops; /* target vector for inftarg.c */
57 static int hpux_thread_active = 0;
59 static int main_pid; /* Real process ID */
61 static CORE_ADDR P_cma__g_known_threads;
62 static CORE_ADDR P_cma__g_current_thread;
64 static struct cleanup * save_inferior_pid PARAMS ((void));
65 static void restore_inferior_pid PARAMS ((int pid));
66 static void hpux_thread_resume PARAMS ((int pid, int step,
67 enum target_signal signo));
73 save_inferior_pid - Save inferior_pid on the cleanup list
74 restore_inferior_pid - Restore inferior_pid from the cleanup list
78 struct cleanup *save_inferior_pid ()
79 void restore_inferior_pid (int pid)
83 These two functions act in unison to restore inferior_pid in
88 inferior_pid is a global variable that needs to be changed by many of
89 these routines before calling functions in procfs.c. In order to
90 guarantee that inferior_pid gets restored (in case of errors), you
91 need to call save_inferior_pid before changing it. At the end of the
92 function, you should invoke do_cleanups to restore it.
97 static struct cleanup *
100 return make_cleanup (restore_inferior_pid, inferior_pid);
104 restore_inferior_pid (pid)
110 static int find_active_thread PARAMS ((void));
112 static int cached_thread;
113 static int cached_active_thread;
114 static cma__t_int_tcb cached_tcb;
117 find_active_thread ()
119 static cma__t_int_tcb tcb;
122 if (cached_active_thread != 0)
123 return cached_active_thread;
125 read_memory ((CORE_ADDR)P_cma__g_current_thread,
129 read_memory (tcb_ptr, (char *)&tcb, sizeof tcb);
131 return (cma_thread_get_unique (&tcb.prolog.client_thread) << 16) | main_pid;
134 static cma__t_int_tcb * find_tcb PARAMS ((int thread));
136 static cma__t_int_tcb *
140 cma__t_known_object queue_header;
141 cma__t_queue *queue_ptr;
143 if (thread == cached_thread)
146 read_memory ((CORE_ADDR)P_cma__g_known_threads,
147 (char *)&queue_header,
148 sizeof queue_header);
150 for (queue_ptr = queue_header.queue.flink;
151 queue_ptr != (cma__t_queue *)P_cma__g_known_threads;
152 queue_ptr = cached_tcb.threads.flink)
154 cma__t_int_tcb *tcb_ptr;
156 tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb);
158 read_memory ((CORE_ADDR)tcb_ptr, (char *)&cached_tcb, sizeof cached_tcb);
160 if (cached_tcb.header.type == cma__c_obj_tcb)
161 if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread >> 16)
163 cached_thread = thread;
168 error ("Can't find TCB %d,%d", thread >> 16, thread & 0xffff);
172 /* Most target vector functions from here on actually just pass through to
173 inftarg.c, as they don't need to do anything specific for threads. */
177 hpux_thread_open (arg, from_tty)
181 child_ops.to_open (arg, from_tty);
184 /* Attach to process PID, then initialize for debugging it
185 and wait for the trace-trap that results from attaching. */
188 hpux_thread_attach (args, from_tty)
192 child_ops.to_attach (args, from_tty);
194 /* XXX - might want to iterate over all the threads and register them. */
197 /* Take a program previously attached to and detaches it.
198 The program resumes execution and will no longer stop
199 on signals, etc. We'd better not have left any breakpoints
200 in the program or it'll die when it hits one. For this
201 to work, it may be necessary for the process to have been
202 previously attached. It *might* work if the program was
203 started via the normal ptrace (PTRACE_TRACEME). */
206 hpux_thread_detach (args, from_tty)
210 child_ops.to_detach (args, from_tty);
213 /* Resume execution of process PID. If STEP is nozero, then
214 just single step it. If SIGNAL is nonzero, restart it with that
215 signal activated. We may have to convert pid from a thread-id to an LWP id
219 hpux_thread_resume (pid, step, signo)
222 enum target_signal signo;
224 struct cleanup *old_chain;
226 old_chain = save_inferior_pid ();
228 pid = inferior_pid = main_pid;
233 pid = thread_to_lwp (pid, -2);
234 if (pid == -2) /* Inactive thread */
235 error ("This version of Solaris can't start inactive threads.");
239 child_ops.to_resume (pid, step, signo);
242 cached_active_thread = 0;
244 do_cleanups (old_chain);
247 /* Wait for any threads to stop. We may have to convert PID from a thread id
248 to a LWP id, and vice versa on the way out. */
251 hpux_thread_wait (pid, ourstatus)
253 struct target_waitstatus *ourstatus;
256 struct cleanup *old_chain;
258 old_chain = save_inferior_pid ();
260 inferior_pid = main_pid;
265 rtnval = child_ops.to_wait (pid, ourstatus);
267 rtnval = find_active_thread ();
269 do_cleanups (old_chain);
274 static char regmap[NUM_REGS] =
276 -2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
277 28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
278 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
280 /* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
281 -2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
283 /* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
284 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
286 /* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
287 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
289 -1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
290 144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
291 -1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
292 -1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
293 136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
294 104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
295 72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
296 -1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
297 -1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
301 hpux_thread_fetch_registers (regno)
304 cma__t_int_tcb tcb, *tcb_ptr;
305 struct cleanup *old_chain;
307 int first_regno, last_regno;
309 tcb_ptr = find_tcb (inferior_pid);
311 old_chain = save_inferior_pid ();
313 inferior_pid = main_pid;
315 if (tcb_ptr->state == cma__c_state_running)
317 child_ops.to_fetch_registers (regno);
319 do_cleanups (old_chain);
327 last_regno = NUM_REGS - 1;
335 for (regno = first_regno; regno <= last_regno; regno++)
337 if (regmap[regno] == -1)
338 child_ops.to_fetch_registers (regno);
341 unsigned char buf[MAX_REGISTER_RAW_SIZE];
344 sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
346 if (regno == FLAGS_REGNUM)
347 /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
348 memset (buf, '\000', REGISTER_RAW_SIZE (regno));
349 else if (regno == SP_REGNUM)
350 store_address (buf, sizeof sp, sp);
351 else if (regno == PC_REGNUM)
352 read_memory (sp - 20, buf, REGISTER_RAW_SIZE (regno));
354 read_memory (sp + regmap[regno], buf, REGISTER_RAW_SIZE (regno));
356 supply_register (regno, buf);
360 do_cleanups (old_chain);
364 hpux_thread_store_registers (regno)
367 cma__t_int_tcb tcb, *tcb_ptr;
368 struct cleanup *old_chain;
370 int first_regno, last_regno;
372 tcb_ptr = find_tcb (inferior_pid);
374 old_chain = save_inferior_pid ();
376 inferior_pid = main_pid;
378 if (tcb_ptr->state == cma__c_state_running)
380 child_ops.to_store_registers (regno);
382 do_cleanups (old_chain);
390 last_regno = NUM_REGS - 1;
398 for (regno = first_regno; regno <= last_regno; regno++)
400 if (regmap[regno] == -1)
401 child_ops.to_store_registers (regno);
404 unsigned char buf[MAX_REGISTER_RAW_SIZE];
407 sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
409 if (regno == FLAGS_REGNUM)
410 child_ops.to_store_registers (regno); /* Let lower layer handle this... */
411 else if (regno == SP_REGNUM)
413 write_memory ((CORE_ADDR)&tcb_ptr->static_ctx.sp,
414 registers + REGISTER_BYTE (regno),
415 REGISTER_RAW_SIZE (regno));
416 tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *)
417 (extract_address (registers + REGISTER_BYTE (regno), REGISTER_RAW_SIZE (regno)) + 160);
419 else if (regno == PC_REGNUM)
420 write_memory (sp - 20,
421 registers + REGISTER_BYTE (regno),
422 REGISTER_RAW_SIZE (regno));
424 write_memory (sp + regmap[regno],
425 registers + REGISTER_BYTE (regno),
426 REGISTER_RAW_SIZE (regno));
430 do_cleanups (old_chain);
433 /* Get ready to modify the registers array. On machines which store
434 individual registers, this doesn't need to do anything. On machines
435 which store all the registers in one fell swoop, this makes sure
436 that registers contains all the registers from the program being
440 hpux_thread_prepare_to_store ()
442 child_ops.to_prepare_to_store ();
446 hpux_thread_xfer_memory (memaddr, myaddr, len, dowrite, target)
451 struct target_ops *target; /* ignored */
454 struct cleanup *old_chain;
456 old_chain = save_inferior_pid ();
458 inferior_pid = main_pid;
460 retval = child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, target);
462 do_cleanups (old_chain);
467 /* Print status information about what we're accessing. */
470 hpux_thread_files_info (ignore)
471 struct target_ops *ignore;
473 child_ops.to_files_info (ignore);
477 hpux_thread_kill_inferior ()
479 child_ops.to_kill ();
483 hpux_thread_notice_signals (pid)
486 child_ops.to_notice_signals (pid);
489 /* Fork an inferior process, and start debugging it with /proc. */
492 hpux_thread_create_inferior (exec_file, allargs, env)
497 child_ops.to_create_inferior (exec_file, allargs, env);
499 if (hpux_thread_active)
501 main_pid = inferior_pid;
503 push_target (&hpux_thread_ops);
505 inferior_pid = find_active_thread ();
507 add_thread (inferior_pid);
511 /* This routine is called whenever a new symbol table is read in, or when all
512 symbol tables are removed. libthread_db can only be initialized when it
513 finds the right variables in libthread.so. Since it's a shared library,
514 those variables don't show up until the library gets mapped and the symbol
518 hpux_thread_new_objfile (objfile)
519 struct objfile *objfile;
521 struct minimal_symbol *ms;
525 hpux_thread_active = 0;
530 ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile);
535 P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms);
537 ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile);
542 P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms);
544 hpux_thread_active = 1;
547 /* Clean up after the inferior dies. */
550 hpux_thread_mourn_inferior ()
552 child_ops.to_mourn_inferior ();
555 /* Mark our target-struct as eligible for stray "run" and "attach" commands. */
558 hpux_thread_can_run ()
560 return child_suppress_run;
564 hpux_thread_alive (pid)
573 child_ops.to_stop ();
576 /* Convert a pid to printable form. */
579 hpux_pid_to_str (pid)
582 static char buf[100];
584 sprintf (buf, "Thread %d", pid >> 16);
589 struct target_ops hpux_thread_ops = {
590 "hpux-threads", /* to_shortname */
591 "HPUX threads and pthread.", /* to_longname */
592 "HPUX threads and pthread support.", /* to_doc */
593 hpux_thread_open, /* to_open */
595 hpux_thread_attach, /* to_attach */
596 hpux_thread_detach, /* to_detach */
597 hpux_thread_resume, /* to_resume */
598 hpux_thread_wait, /* to_wait */
599 hpux_thread_fetch_registers, /* to_fetch_registers */
600 hpux_thread_store_registers, /* to_store_registers */
601 hpux_thread_prepare_to_store, /* to_prepare_to_store */
602 hpux_thread_xfer_memory, /* to_xfer_memory */
603 hpux_thread_files_info, /* to_files_info */
604 memory_insert_breakpoint, /* to_insert_breakpoint */
605 memory_remove_breakpoint, /* to_remove_breakpoint */
606 terminal_init_inferior, /* to_terminal_init */
607 terminal_inferior, /* to_terminal_inferior */
608 terminal_ours_for_output, /* to_terminal_ours_for_output */
609 terminal_ours, /* to_terminal_ours */
610 child_terminal_info, /* to_terminal_info */
611 hpux_thread_kill_inferior, /* to_kill */
613 0, /* to_lookup_symbol */
614 hpux_thread_create_inferior, /* to_create_inferior */
615 hpux_thread_mourn_inferior, /* to_mourn_inferior */
616 hpux_thread_can_run, /* to_can_run */
617 hpux_thread_notice_signals, /* to_notice_signals */
618 hpux_thread_alive, /* to_thread_alive */
619 hpux_thread_stop, /* to_stop */
620 process_stratum, /* to_stratum */
622 1, /* to_has_all_memory */
623 1, /* to_has_memory */
624 1, /* to_has_stack */
625 1, /* to_has_registers */
626 1, /* to_has_execution */
628 0, /* sections_end */
629 OPS_MAGIC /* to_magic */
633 _initialize_hpux_thread ()
635 add_target (&hpux_thread_ops);
637 child_suppress_run = 1;