| /* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger. |
| Copyright 1996, 1999 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* 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 <fcntl.h> |
| #include <sys/stat.h> |
| #include "gdbcore.h" |
| |
| extern int child_suppress_run; |
| extern struct target_ops child_ops; /* target vector for inftarg.c */ |
| |
| extern void _initialize_hpux_thread PARAMS ((void)); |
| |
| struct string_map |
| { |
| int num; |
| char *str; |
| }; |
| |
| static int hpux_thread_active = 0; |
| |
| static int main_pid; /* Real process ID */ |
| |
| static CORE_ADDR P_cma__g_known_threads; |
| static CORE_ADDR P_cma__g_current_thread; |
| |
| static struct cleanup *save_inferior_pid PARAMS ((void)); |
| |
| static void restore_inferior_pid PARAMS ((int pid)); |
| |
| static void hpux_thread_resume PARAMS ((int pid, int step, |
| enum target_signal signo)); |
| |
| static void init_hpux_thread_ops PARAMS ((void)); |
| |
| static struct target_ops hpux_thread_ops; |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| save_inferior_pid - Save inferior_pid on the cleanup list |
| restore_inferior_pid - Restore inferior_pid from the cleanup list |
| |
| SYNOPSIS |
| |
| struct cleanup *save_inferior_pid () |
| void restore_inferior_pid (int pid) |
| |
| DESCRIPTION |
| |
| These two functions act in unison to restore inferior_pid in |
| case of an error. |
| |
| NOTES |
| |
| inferior_pid is a global variable that needs to be changed by many of |
| these routines before calling functions in procfs.c. In order to |
| guarantee that inferior_pid gets restored (in case of errors), you |
| need to call save_inferior_pid before changing it. At the end of the |
| function, you should invoke do_cleanups to restore it. |
| |
| */ |
| |
| |
| static struct cleanup * |
| save_inferior_pid () |
| { |
| return make_cleanup (restore_inferior_pid, inferior_pid); |
| } |
| |
| static void |
| restore_inferior_pid (pid) |
| int pid; |
| { |
| inferior_pid = pid; |
| } |
| |
| static int find_active_thread PARAMS ((void)); |
| |
| static int cached_thread; |
| static int cached_active_thread; |
| static cma__t_int_tcb cached_tcb; |
| |
| static int |
| find_active_thread () |
| { |
| static cma__t_int_tcb tcb; |
| CORE_ADDR tcb_ptr; |
| |
| if (cached_active_thread != 0) |
| return cached_active_thread; |
| |
| read_memory ((CORE_ADDR) P_cma__g_current_thread, |
| (char *) &tcb_ptr, |
| sizeof tcb_ptr); |
| |
| read_memory (tcb_ptr, (char *) &tcb, sizeof tcb); |
| |
| return (cma_thread_get_unique (&tcb.prolog.client_thread) << 16) | main_pid; |
| } |
| |
| static cma__t_int_tcb *find_tcb PARAMS ((int thread)); |
| |
| static cma__t_int_tcb * |
| find_tcb (thread) |
| int thread; |
| { |
| cma__t_known_object queue_header; |
| cma__t_queue *queue_ptr; |
| |
| 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 >> 16) |
| { |
| cached_thread = thread; |
| return &cached_tcb; |
| } |
| } |
| |
| error ("Can't find TCB %d,%d", thread >> 16, thread & 0xffff); |
| 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. */ |
| |
| /* ARGSUSED */ |
| static void |
| hpux_thread_open (arg, from_tty) |
| char *arg; |
| int from_tty; |
| { |
| 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 (args, from_tty) |
| char *args; |
| int from_tty; |
| { |
| child_ops.to_attach (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 (args, from_tty) |
| char *args; |
| int from_tty; |
| { |
| child_ops.to_detach (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 (pid, step, signo) |
| int pid; |
| int step; |
| enum target_signal signo; |
| { |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_pid (); |
| |
| pid = inferior_pid = main_pid; |
| |
| #if 0 |
| if (pid != -1) |
| { |
| pid = thread_to_lwp (pid, -2); |
| if (pid == -2) /* Inactive thread */ |
| error ("This version of Solaris can't start inactive threads."); |
| } |
| #endif |
| |
| child_ops.to_resume (pid, step, signo); |
| |
| cached_thread = 0; |
| cached_active_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 int |
| hpux_thread_wait (pid, ourstatus) |
| int pid; |
| struct target_waitstatus *ourstatus; |
| { |
| int rtnval; |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_pid (); |
| |
| inferior_pid = main_pid; |
| |
| if (pid != -1) |
| pid = main_pid; |
| |
| rtnval = child_ops.to_wait (pid, ourstatus); |
| |
| rtnval = find_active_thread (); |
| |
| do_cleanups (old_chain); |
| |
| return rtnval; |
| } |
| |
| static char regmap[NUM_REGS] = |
| { |
| -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 (regno) |
| int regno; |
| { |
| cma__t_int_tcb tcb, *tcb_ptr; |
| struct cleanup *old_chain; |
| int i; |
| int first_regno, last_regno; |
| |
| tcb_ptr = find_tcb (inferior_pid); |
| |
| old_chain = save_inferior_pid (); |
| |
| inferior_pid = main_pid; |
| |
| if (tcb_ptr->state == cma__c_state_running) |
| { |
| child_ops.to_fetch_registers (regno); |
| |
| do_cleanups (old_chain); |
| |
| return; |
| } |
| |
| if (regno == -1) |
| { |
| first_regno = 0; |
| last_regno = NUM_REGS - 1; |
| } |
| else |
| { |
| first_regno = regno; |
| last_regno = regno; |
| } |
| |
| for (regno = first_regno; regno <= last_regno; regno++) |
| { |
| if (regmap[regno] == -1) |
| child_ops.to_fetch_registers (regno); |
| else |
| { |
| unsigned char buf[MAX_REGISTER_RAW_SIZE]; |
| CORE_ADDR sp; |
| |
| sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160; |
| |
| if (regno == FLAGS_REGNUM) |
| /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */ |
| memset (buf, '\000', REGISTER_RAW_SIZE (regno)); |
| else if (regno == SP_REGNUM) |
| store_address (buf, sizeof sp, sp); |
| else if (regno == PC_REGNUM) |
| read_memory (sp - 20, buf, REGISTER_RAW_SIZE (regno)); |
| else |
| read_memory (sp + regmap[regno], buf, REGISTER_RAW_SIZE (regno)); |
| |
| supply_register (regno, buf); |
| } |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| hpux_thread_store_registers (regno) |
| int regno; |
| { |
| cma__t_int_tcb tcb, *tcb_ptr; |
| struct cleanup *old_chain; |
| int i; |
| int first_regno, last_regno; |
| |
| tcb_ptr = find_tcb (inferior_pid); |
| |
| old_chain = save_inferior_pid (); |
| |
| inferior_pid = main_pid; |
| |
| if (tcb_ptr->state == cma__c_state_running) |
| { |
| child_ops.to_store_registers (regno); |
| |
| do_cleanups (old_chain); |
| |
| return; |
| } |
| |
| if (regno == -1) |
| { |
| first_regno = 0; |
| last_regno = NUM_REGS - 1; |
| } |
| else |
| { |
| first_regno = regno; |
| last_regno = regno; |
| } |
| |
| for (regno = first_regno; regno <= last_regno; regno++) |
| { |
| if (regmap[regno] == -1) |
| child_ops.to_store_registers (regno); |
| else |
| { |
| unsigned char buf[MAX_REGISTER_RAW_SIZE]; |
| CORE_ADDR sp; |
| |
| sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160; |
| |
| if (regno == FLAGS_REGNUM) |
| child_ops.to_store_registers (regno); /* Let lower layer handle this... */ |
| else if (regno == SP_REGNUM) |
| { |
| write_memory ((CORE_ADDR) & tcb_ptr->static_ctx.sp, |
| registers + REGISTER_BYTE (regno), |
| REGISTER_RAW_SIZE (regno)); |
| tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *) |
| (extract_address (registers + REGISTER_BYTE (regno), REGISTER_RAW_SIZE (regno)) + 160); |
| } |
| else if (regno == PC_REGNUM) |
| write_memory (sp - 20, |
| registers + REGISTER_BYTE (regno), |
| REGISTER_RAW_SIZE (regno)); |
| else |
| write_memory (sp + regmap[regno], |
| registers + REGISTER_BYTE (regno), |
| REGISTER_RAW_SIZE (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 () |
| { |
| child_ops.to_prepare_to_store (); |
| } |
| |
| static int |
| hpux_thread_xfer_memory (memaddr, myaddr, len, dowrite, target) |
| CORE_ADDR memaddr; |
| char *myaddr; |
| int len; |
| int dowrite; |
| struct target_ops *target; /* ignored */ |
| { |
| int retval; |
| struct cleanup *old_chain; |
| |
| old_chain = save_inferior_pid (); |
| |
| inferior_pid = main_pid; |
| |
| retval = child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, target); |
| |
| do_cleanups (old_chain); |
| |
| return retval; |
| } |
| |
| /* Print status information about what we're accessing. */ |
| |
| static void |
| hpux_thread_files_info (ignore) |
| struct target_ops *ignore; |
| { |
| child_ops.to_files_info (ignore); |
| } |
| |
| static void |
| hpux_thread_kill_inferior () |
| { |
| child_ops.to_kill (); |
| } |
| |
| static void |
| hpux_thread_notice_signals (pid) |
| int pid; |
| { |
| child_ops.to_notice_signals (pid); |
| } |
| |
| /* Fork an inferior process, and start debugging it with /proc. */ |
| |
| static void |
| hpux_thread_create_inferior (exec_file, allargs, env) |
| char *exec_file; |
| char *allargs; |
| char **env; |
| { |
| child_ops.to_create_inferior (exec_file, allargs, env); |
| |
| if (hpux_thread_active) |
| { |
| main_pid = inferior_pid; |
| |
| push_target (&hpux_thread_ops); |
| |
| inferior_pid = find_active_thread (); |
| |
| add_thread (inferior_pid); |
| } |
| } |
| |
| /* 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. */ |
| |
| /* This new_objfile event is now managed by a chained function pointer. |
| * It is the callee's responsability to call the next client on the chain. |
| */ |
| |
| /* Saved pointer to previous owner of the new_objfile event. */ |
| static void (*target_new_objfile_chain) PARAMS ((struct objfile *)); |
| |
| void |
| hpux_thread_new_objfile (objfile) |
| struct objfile *objfile; |
| { |
| struct minimal_symbol *ms; |
| |
| if (!objfile) |
| { |
| hpux_thread_active = 0; |
| goto quit; |
| } |
| |
| ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile); |
| |
| if (!ms) |
| goto quit; |
| |
| P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms); |
| |
| ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile); |
| |
| if (!ms) |
| goto quit; |
| |
| P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms); |
| |
| hpux_thread_active = 1; |
| quit: |
| /* Call predecessor on chain, if any. */ |
| if (target_new_objfile_chain) |
| target_new_objfile_chain (objfile); |
| } |
| |
| /* Clean up after the inferior dies. */ |
| |
| static void |
| hpux_thread_mourn_inferior () |
| { |
| child_ops.to_mourn_inferior (); |
| } |
| |
| /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| |
| static int |
| hpux_thread_can_run () |
| { |
| return child_suppress_run; |
| } |
| |
| static int |
| hpux_thread_alive (pid) |
| int pid; |
| { |
| return 1; |
| } |
| |
| static void |
| hpux_thread_stop () |
| { |
| child_ops.to_stop (); |
| } |
| |
| /* Convert a pid to printable form. */ |
| |
| char * |
| hpux_pid_to_str (pid) |
| int pid; |
| { |
| static char buf[100]; |
| |
| sprintf (buf, "Thread %d", pid >> 16); |
| |
| return buf; |
| } |
| |
| static void |
| init_hpux_thread_ops () |
| { |
| 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.to_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_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 = 1; |
| hpux_thread_ops.to_has_memory = 1; |
| hpux_thread_ops.to_has_stack = 1; |
| hpux_thread_ops.to_has_registers = 1; |
| hpux_thread_ops.to_has_execution = 1; |
| hpux_thread_ops.to_magic = OPS_MAGIC; |
| } |
| |
| void |
| _initialize_hpux_thread () |
| { |
| init_hpux_thread_ops (); |
| add_target (&hpux_thread_ops); |
| |
| child_suppress_run = 1; |
| /* Hook into new_objfile notification. */ |
| target_new_objfile_chain = target_new_objfile_hook; |
| target_new_objfile_hook = hpux_thread_new_objfile; |
| } |