| /* Low level interface for debugging HPUX/DCE threads for GDB, the GNU |
| debugger. |
| |
| Copyright (C) 1996, 1998, 1999, 2000, 2001, 2004, 2007, 2008, 2009, 2010 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| /* This module implements a sort of half target that sits between the |
| machine-independent parts of GDB and the ptrace interface (infptrace.c) to |
| provide access to the HPUX user-mode thread implementation. |
| |
| HPUX threads are true user-mode threads, which are invoked via the cma_* |
| and pthread_* (DCE and Posix respectivly) interfaces. These are mostly |
| implemented in user-space, with all thread context kept in various |
| structures that live in the user's heap. For the most part, the kernel has |
| no knowlege of these threads. |
| |
| */ |
| |
| #include "defs.h" |
| |
| #define _CMA_NOWRAPPERS_ |
| |
| #include <cma_tcb_defs.h> |
| #include <cma_deb_core.h> |
| #include "gdbthread.h" |
| #include "target.h" |
| #include "inferior.h" |
| #include "regcache.h" |
| #include <fcntl.h> |
| #include <string.h> |
| #include "gdb_stat.h" |
| #include "gdbcore.h" |
| #include "hppa-tdep.h" |
| #include "observer.h" |
| |
| extern int child_suppress_run; |
| |
| extern void _initialize_hpux_thread (void); |
| |
| struct string_map |
| { |
| int num; |
| char *str; |
| }; |
| |
| static int hpux_thread_active = 0; |
| |
| static ptid_t main_ptid; /* Real process ID */ |
| |
| static CORE_ADDR P_cma__g_known_threads; |
| static CORE_ADDR P_cma__g_current_thread; |
| |
| static void init_hpux_thread_ops (void); |
| |
| static struct target_ops hpux_thread_ops; |
| |
| static ptid_t find_active_thread (void); |
| |
| static int cached_thread; |
| static cma__t_int_tcb cached_tcb; |
| |
| static ptid_t |
| find_active_thread (void) |
| { |
| static cma__t_int_tcb tcb; |
| CORE_ADDR tcb_ptr; |
| |
| read_memory ((CORE_ADDR) P_cma__g_current_thread, |
| (char *) &tcb_ptr, |
| sizeof tcb_ptr); |
| |
| read_memory (tcb_ptr, (char *) &tcb, sizeof tcb); |
| |
| return (ptid_build (PIDGET (main_ptid), 0, |
| cma_thread_get_unique (&tcb.prolog.client_thread))); |
| } |
| |
| static cma__t_int_tcb *find_tcb (ptid_t ptid); |
| |
| static cma__t_int_tcb * |
| find_tcb (ptid_t ptid) |
| { |
| cma__t_known_object queue_header; |
| cma__t_queue *queue_ptr; |
| int thread = ptid_get_tid (ptid); |
| |
| if (thread == cached_thread) |
| return &cached_tcb; |
| |
| read_memory ((CORE_ADDR) P_cma__g_known_threads, |
| (char *) &queue_header, |
| sizeof queue_header); |
| |
| for (queue_ptr = queue_header.queue.flink; |
| queue_ptr != (cma__t_queue *) P_cma__g_known_threads; |
| queue_ptr = cached_tcb.threads.flink) |
| { |
| cma__t_int_tcb *tcb_ptr; |
| |
| tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb); |
| |
| read_memory ((CORE_ADDR) tcb_ptr, (char *) &cached_tcb, sizeof cached_tcb); |
| |
| if (cached_tcb.header.type == cma__c_obj_tcb) |
| if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread) |
| { |
| cached_thread = thread; |
| return &cached_tcb; |
| } |
| } |
| |
| error (_("Can't find TCB %d"), thread); |
| return NULL; |
| } |
| |
| /* Most target vector functions from here on actually just pass through to |
| inftarg.c, as they don't need to do anything specific for threads. */ |
| |
| static void |
| hpux_thread_open (char *arg, int from_tty) |
| { |
| deprecated_child_ops.to_open (arg, from_tty); |
| } |
| |
| /* Attach to process PID, then initialize for debugging it |
| and wait for the trace-trap that results from attaching. */ |
| |
| static void |
| hpux_thread_attach (struct target_ops *ops, char *args, int from_tty) |
| { |
| deprecated_child_ops.to_attach (&deprecated_child_ops, args, from_tty); |
| |
| /* XXX - might want to iterate over all the threads and register them. */ |
| } |
| |
| /* Take a program previously attached to and detaches it. |
| The program resumes execution and will no longer stop |
| on signals, etc. We'd better not have left any breakpoints |
| in the program or it'll die when it hits one. For this |
| to work, it may be necessary for the process to have been |
| previously attached. It *might* work if the program was |
| started via the normal ptrace (PTRACE_TRACEME). */ |
| |
| static void |
| hpux_thread_detach (struct target_ops *ops, char *args, int from_tty) |
| { |
| deprecated_child_ops.to_detach (&deprecated_child_ops, args, from_tty); |
| } |
| |
| /* Resume execution of process PID. If STEP is nozero, then |
| just single step it. If SIGNAL is nonzero, restart it with that |
| signal activated. We may have to convert pid from a thread-id to an LWP id |
| for procfs. */ |
| |
| static void |
| hpux_thread_resume (struct target_ops *ops, |
| ptid_t ptid, int step, enum target_signal signo) |
| { |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_ptid (); |
| |
| ptid = main_ptid; |
| inferior_ptid = main_ptid; |
| |
| deprecated_child_ops.to_resume (&deprecated_child_ops, ptid, step, signo); |
| |
| cached_thread = 0; |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Wait for any threads to stop. We may have to convert PID from a thread id |
| to a LWP id, and vice versa on the way out. */ |
| |
| static ptid_t |
| hpux_thread_wait (struct target_ops *ops, |
| ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
| { |
| ptid_t rtnval; |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_ptid (); |
| |
| inferior_ptid = main_ptid; |
| |
| if (!ptid_equal (ptid, minus_one_ptid)) |
| ptid = main_ptid; |
| |
| rtnval = deprecated_child_ops.to_wait (&deprecated_child_ops, |
| ptid, ourstatus, options); |
| |
| rtnval = find_active_thread (); |
| |
| do_cleanups (old_chain); |
| |
| return rtnval; |
| } |
| |
| static char regmap[] = |
| { |
| -2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */ |
| 28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */ |
| |
| /* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */ |
| -2, -1, -1, -2, -1, -1, -1, -1, -1, -1, |
| |
| /* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| |
| /* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| |
| -1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */ |
| 144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */ |
| 136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */ |
| 104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */ |
| 72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */ |
| -1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */ |
| }; |
| |
| static void |
| hpux_thread_fetch_registers (struct target_ops *ops, |
| struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| cma__t_int_tcb tcb, *tcb_ptr; |
| struct cleanup *old_chain; |
| int i; |
| int first_regno, last_regno; |
| |
| tcb_ptr = find_tcb (inferior_ptid); |
| |
| old_chain = save_inferior_ptid (); |
| |
| inferior_ptid = main_ptid; |
| |
| if (tcb_ptr->state == cma__c_state_running) |
| { |
| deprecated_child_ops.to_fetch_registers (&deprecated_child_ops, |
| regcache, regno); |
| |
| do_cleanups (old_chain); |
| |
| return; |
| } |
| |
| if (regno == -1) |
| { |
| first_regno = 0; |
| last_regno = gdbarch_num_regs (gdbarch) - 1; |
| } |
| else |
| { |
| first_regno = regno; |
| last_regno = regno; |
| } |
| |
| for (regno = first_regno; regno <= last_regno; regno++) |
| { |
| if (regmap[regno] == -1) |
| deprecated_child_ops.to_fetch_registers (&deprecated_child_ops, |
| regcache, regno); |
| else |
| { |
| unsigned char buf[MAX_REGISTER_SIZE]; |
| CORE_ADDR sp; |
| |
| sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160; |
| |
| if (regno == HPPA_FLAGS_REGNUM) |
| /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */ |
| memset (buf, '\000', register_size (gdbarch, regno)); |
| else if (regno == HPPA_SP_REGNUM) |
| store_unsigned_integer (buf, sizeof sp, byte_order, sp); |
| else if (regno == HPPA_PCOQ_HEAD_REGNUM) |
| read_memory (sp - 20, buf, register_size (gdbarch, regno)); |
| else |
| read_memory (sp + regmap[regno], buf, |
| register_size (gdbarch, regno)); |
| |
| regcache_raw_supply (regcache, regno, buf); |
| } |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| hpux_thread_store_registers (struct target_ops *ops, |
| struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| cma__t_int_tcb tcb, *tcb_ptr; |
| struct cleanup *old_chain; |
| int i; |
| int first_regno, last_regno; |
| |
| tcb_ptr = find_tcb (inferior_ptid); |
| |
| old_chain = save_inferior_ptid (); |
| |
| inferior_ptid = main_ptid; |
| |
| if (tcb_ptr->state == cma__c_state_running) |
| { |
| deprecated_child_ops.to_store_registers (&deprecated_child_ops, |
| regcache, regno); |
| |
| do_cleanups (old_chain); |
| |
| return; |
| } |
| |
| if (regno == -1) |
| { |
| first_regno = 0; |
| last_regno = gdbarch_num_regs (gdbarch) - 1; |
| } |
| else |
| { |
| first_regno = regno; |
| last_regno = regno; |
| } |
| |
| for (regno = first_regno; regno <= last_regno; regno++) |
| { |
| if (regmap[regno] == -1) |
| deprecated_child_ops.to_store_registers (regcache, regno); |
| else |
| { |
| unsigned char buf[MAX_REGISTER_SIZE]; |
| CORE_ADDR sp; |
| |
| sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160; |
| |
| if (regno == HPPA_FLAGS_REGNUM) |
| { |
| /* Let lower layer handle this... */ |
| deprecated_child_ops.to_store_registers |
| (&deprecated_child_ops, regcache, regno); |
| } |
| else if (regno == HPPA_SP_REGNUM) |
| { |
| regcache_raw_collect (regcache, regno, buf); |
| write_memory ((CORE_ADDR) &tcb_ptr->static_ctx.sp, buf, |
| register_size (gdbarch, regno)); |
| tcb_ptr->static_ctx.sp |
| = (cma__t_hppa_regs *) ((CORE_ADDR) buf + 160); |
| } |
| else if (regno == HPPA_PCOQ_HEAD_REGNUM) |
| { |
| regcache_raw_collect (regcache, regno, buf); |
| write_memory (sp - 20, buf, |
| register_size (gdbarch, regno)); |
| } |
| else |
| { |
| regcache_raw_collect (regcache, regno, buf); |
| write_memory (sp + regmap[regno], buf, |
| register_size (gdbarch, regno)); |
| } |
| } |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Get ready to modify the registers array. On machines which store |
| individual registers, this doesn't need to do anything. On machines |
| which store all the registers in one fell swoop, this makes sure |
| that registers contains all the registers from the program being |
| debugged. */ |
| |
| static void |
| hpux_thread_prepare_to_store (struct regcache *regcache) |
| { |
| deprecated_child_ops.to_prepare_to_store (regcache); |
| } |
| |
| static int |
| hpux_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| int dowrite, struct mem_attrib *attribs, |
| struct target_ops *target) |
| { |
| int retval; |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_ptid (); |
| |
| inferior_ptid = main_ptid; |
| |
| retval = |
| deprecated_child_ops.deprecated_xfer_memory (memaddr, myaddr, len, dowrite, attribs, target); |
| |
| do_cleanups (old_chain); |
| |
| return retval; |
| } |
| |
| /* Print status information about what we're accessing. */ |
| |
| static void |
| hpux_thread_files_info (struct target_ops *ignore) |
| { |
| deprecated_child_ops.to_files_info (ignore); |
| } |
| |
| static void |
| hpux_thread_kill_inferior (struct target_ops *ops) |
| { |
| deprecated_child_ops.to_kill (&deprecated_child_ops); |
| } |
| |
| static void |
| hpux_thread_notice_signals (ptid_t ptid) |
| { |
| deprecated_child_ops.to_notice_signals (ptid); |
| } |
| |
| /* Fork an inferior process, and start debugging it with /proc. */ |
| |
| static void |
| hpux_thread_create_inferior (struct target_ops *ops, char *exec_file, |
| char *allargs, char **env, int from_tty) |
| { |
| deprecated_child_ops.to_create_inferior (&deprecated_child_ops, |
| exec_file, allargs, env, from_tty); |
| |
| if (hpux_thread_active) |
| { |
| main_ptid = inferior_ptid; |
| |
| push_target (&hpux_thread_ops); |
| |
| inferior_ptid = find_active_thread (); |
| |
| add_thread (inferior_ptid); |
| } |
| } |
| |
| /* This routine is called whenever a new symbol table is read in, or when all |
| symbol tables are removed. libthread_db can only be initialized when it |
| finds the right variables in libthread.so. Since it's a shared library, |
| those variables don't show up until the library gets mapped and the symbol |
| table is read in. */ |
| |
| static void |
| hpux_thread_new_objfile (struct objfile *objfile) |
| { |
| struct minimal_symbol *ms; |
| |
| if (!objfile) |
| { |
| hpux_thread_active = 0; |
| return; |
| } |
| |
| ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile); |
| |
| if (!ms) |
| return; |
| |
| P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms); |
| |
| ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile); |
| |
| if (!ms) |
| return; |
| |
| P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms); |
| |
| hpux_thread_active = 1; |
| } |
| |
| /* Clean up after the inferior dies. */ |
| |
| static void |
| hpux_thread_mourn_inferior (void) |
| { |
| deprecated_child_ops.to_mourn_inferior (&deprecated_child_ops); |
| } |
| |
| /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| |
| static int |
| hpux_thread_can_run (void) |
| { |
| return child_suppress_run; |
| } |
| |
| static int |
| hpux_thread_alive (struct target_ops *ops, ptid_t ptid) |
| { |
| return 1; |
| } |
| |
| static void |
| hpux_thread_stop (ptid_t ptid) |
| { |
| deprecated_child_ops.to_stop (ptid); |
| } |
| |
| /* Convert a pid to printable form. */ |
| |
| char * |
| hpux_pid_to_str (ptid_t ptid) |
| { |
| static char buf[100]; |
| int pid = PIDGET (ptid); |
| |
| sprintf (buf, "Thread %ld", ptid_get_tid (ptid)); |
| |
| return buf; |
| } |
| |
| static void |
| init_hpux_thread_ops (void) |
| { |
| hpux_thread_ops.to_shortname = "hpux-threads"; |
| hpux_thread_ops.to_longname = "HPUX threads and pthread."; |
| hpux_thread_ops.to_doc = "HPUX threads and pthread support."; |
| hpux_thread_ops.to_open = hpux_thread_open; |
| hpux_thread_ops.to_attach = hpux_thread_attach; |
| hpux_thread_ops.to_detach = hpux_thread_detach; |
| hpux_thread_ops.to_resume = hpux_thread_resume; |
| hpux_thread_ops.to_wait = hpux_thread_wait; |
| hpux_thread_ops.to_fetch_registers = hpux_thread_fetch_registers; |
| hpux_thread_ops.to_store_registers = hpux_thread_store_registers; |
| hpux_thread_ops.to_prepare_to_store = hpux_thread_prepare_to_store; |
| hpux_thread_ops.deprecated_xfer_memory = hpux_thread_xfer_memory; |
| hpux_thread_ops.to_files_info = hpux_thread_files_info; |
| hpux_thread_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| hpux_thread_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| hpux_thread_ops.to_terminal_init = terminal_init_inferior; |
| hpux_thread_ops.to_terminal_inferior = terminal_inferior; |
| hpux_thread_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| hpux_thread_ops.to_terminal_save_ours = terminal_save_ours; |
| hpux_thread_ops.to_terminal_ours = terminal_ours; |
| hpux_thread_ops.to_terminal_info = child_terminal_info; |
| hpux_thread_ops.to_kill = hpux_thread_kill_inferior; |
| hpux_thread_ops.to_create_inferior = hpux_thread_create_inferior; |
| hpux_thread_ops.to_mourn_inferior = hpux_thread_mourn_inferior; |
| hpux_thread_ops.to_can_run = hpux_thread_can_run; |
| hpux_thread_ops.to_notice_signals = hpux_thread_notice_signals; |
| hpux_thread_ops.to_thread_alive = hpux_thread_alive; |
| hpux_thread_ops.to_stop = hpux_thread_stop; |
| hpux_thread_ops.to_stratum = process_stratum; |
| hpux_thread_ops.to_has_all_memory = default_child_has_all_memory; |
| hpux_thread_ops.to_has_memory = default_child_has_memory; |
| hpux_thread_ops.to_has_stack = default_child_has_stack; |
| hpux_thread_ops.to_has_registers = default_child_has_registers; |
| hpux_thread_ops.to_has_execution = default_child_has_execution; |
| hpux_thread_ops.to_magic = OPS_MAGIC; |
| } |
| |
| void |
| _initialize_hpux_thread (void) |
| { |
| init_hpux_thread_ops (); |
| add_target (&hpux_thread_ops); |
| |
| child_suppress_run = 1; |
| /* Hook into new_objfile notification. */ |
| observer_attach_new_objfile (hpux_thread_new_objfile); |
| } |