664 lines
17 KiB
C
664 lines
17 KiB
C
/* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger.
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Copyright 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This module implements a sort of half target that sits between the
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machine-independent parts of GDB and the ptrace interface (infptrace.c) to
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provide access to the HPUX user-mode thread implementation.
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HPUX threads are true user-mode threads, which are invoked via the cma_*
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and pthread_* (DCE and Posix respectivly) interfaces. These are mostly
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implemented in user-space, with all thread context kept in various
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structures that live in the user's heap. For the most part, the kernel has
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no knowlege of these threads.
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*/
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#include "defs.h"
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#define _CMA_NOWRAPPERS_
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#include <cma_tcb_defs.h>
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#include <cma_deb_core.h>
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#include "gdbthread.h"
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#include "target.h"
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#include "inferior.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "gdbcore.h"
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extern struct target_ops hpux_thread_ops; /* Forward declaration */
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extern int child_suppress_run;
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extern struct target_ops child_ops; /* target vector for inftarg.c */
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struct string_map
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{
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int num;
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char *str;
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};
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static int hpux_thread_active = 0;
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static int main_pid; /* Real process ID */
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static CORE_ADDR P_cma__g_known_threads;
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static CORE_ADDR P_cma__g_current_thread;
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static struct cleanup * save_inferior_pid PARAMS ((void));
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static void restore_inferior_pid PARAMS ((int pid));
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static void hpux_thread_resume PARAMS ((int pid, int step,
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enum target_signal signo));
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/*
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LOCAL FUNCTION
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save_inferior_pid - Save inferior_pid on the cleanup list
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restore_inferior_pid - Restore inferior_pid from the cleanup list
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SYNOPSIS
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struct cleanup *save_inferior_pid ()
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void restore_inferior_pid (int pid)
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DESCRIPTION
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These two functions act in unison to restore inferior_pid in
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case of an error.
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NOTES
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inferior_pid is a global variable that needs to be changed by many of
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these routines before calling functions in procfs.c. In order to
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guarantee that inferior_pid gets restored (in case of errors), you
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need to call save_inferior_pid before changing it. At the end of the
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function, you should invoke do_cleanups to restore it.
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*/
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static struct cleanup *
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save_inferior_pid ()
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{
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return make_cleanup (restore_inferior_pid, inferior_pid);
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}
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static void
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restore_inferior_pid (pid)
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int pid;
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{
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inferior_pid = pid;
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}
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static int find_active_thread PARAMS ((void));
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static int cached_thread;
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static int cached_active_thread;
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static cma__t_int_tcb cached_tcb;
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static int
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find_active_thread ()
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{
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static cma__t_int_tcb tcb;
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CORE_ADDR tcb_ptr;
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if (cached_active_thread != 0)
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return cached_active_thread;
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read_memory ((CORE_ADDR)P_cma__g_current_thread,
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(char *)&tcb_ptr,
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sizeof tcb_ptr);
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read_memory (tcb_ptr, (char *)&tcb, sizeof tcb);
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return (cma_thread_get_unique (&tcb.prolog.client_thread) << 16) | main_pid;
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}
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static cma__t_int_tcb * find_tcb PARAMS ((int thread));
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static cma__t_int_tcb *
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find_tcb (thread)
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int thread;
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{
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cma__t_known_object queue_header;
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cma__t_queue *queue_ptr;
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if (thread == cached_thread)
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return &cached_tcb;
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read_memory ((CORE_ADDR)P_cma__g_known_threads,
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(char *)&queue_header,
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sizeof queue_header);
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for (queue_ptr = queue_header.queue.flink;
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queue_ptr != (cma__t_queue *)P_cma__g_known_threads;
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queue_ptr = cached_tcb.threads.flink)
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{
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cma__t_int_tcb *tcb_ptr;
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tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb);
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read_memory ((CORE_ADDR)tcb_ptr, (char *)&cached_tcb, sizeof cached_tcb);
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if (cached_tcb.header.type == cma__c_obj_tcb)
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if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread >> 16)
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{
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cached_thread = thread;
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return &cached_tcb;
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}
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}
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error ("Can't find TCB %d,%d", thread >> 16, thread & 0xffff);
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return NULL;
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}
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/* Most target vector functions from here on actually just pass through to
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inftarg.c, as they don't need to do anything specific for threads. */
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/* ARGSUSED */
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static void
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hpux_thread_open (arg, from_tty)
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char *arg;
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int from_tty;
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{
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child_ops.to_open (arg, from_tty);
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}
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/* Attach to process PID, then initialize for debugging it
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and wait for the trace-trap that results from attaching. */
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static void
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hpux_thread_attach (args, from_tty)
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char *args;
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int from_tty;
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{
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child_ops.to_attach (args, from_tty);
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/* XXX - might want to iterate over all the threads and register them. */
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}
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/* Take a program previously attached to and detaches it.
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The program resumes execution and will no longer stop
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on signals, etc. We'd better not have left any breakpoints
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in the program or it'll die when it hits one. For this
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to work, it may be necessary for the process to have been
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previously attached. It *might* work if the program was
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started via the normal ptrace (PTRACE_TRACEME). */
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static void
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hpux_thread_detach (args, from_tty)
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char *args;
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int from_tty;
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{
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child_ops.to_detach (args, from_tty);
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}
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/* Resume execution of process PID. If STEP is nozero, then
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just single step it. If SIGNAL is nonzero, restart it with that
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signal activated. We may have to convert pid from a thread-id to an LWP id
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for procfs. */
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static void
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hpux_thread_resume (pid, step, signo)
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int pid;
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int step;
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enum target_signal signo;
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{
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struct cleanup *old_chain;
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old_chain = save_inferior_pid ();
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pid = inferior_pid = main_pid;
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#if 0
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if (pid != -1)
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{
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pid = thread_to_lwp (pid, -2);
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if (pid == -2) /* Inactive thread */
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error ("This version of Solaris can't start inactive threads.");
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}
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#endif
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child_ops.to_resume (pid, step, signo);
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cached_thread = 0;
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cached_active_thread = 0;
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do_cleanups (old_chain);
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}
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/* Wait for any threads to stop. We may have to convert PID from a thread id
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to a LWP id, and vice versa on the way out. */
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static int
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hpux_thread_wait (pid, ourstatus)
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int pid;
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struct target_waitstatus *ourstatus;
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{
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int rtnval;
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struct cleanup *old_chain;
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old_chain = save_inferior_pid ();
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inferior_pid = main_pid;
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if (pid != -1)
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pid = main_pid;
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rtnval = child_ops.to_wait (pid, ourstatus);
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rtnval = find_active_thread ();
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do_cleanups (old_chain);
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return rtnval;
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}
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static char regmap[NUM_REGS] =
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{
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-2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
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28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
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/* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
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-2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
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/* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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/* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
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144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
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136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
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104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
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72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
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};
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static void
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hpux_thread_fetch_registers (regno)
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int regno;
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{
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cma__t_int_tcb tcb, *tcb_ptr;
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struct cleanup *old_chain;
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int i;
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int first_regno, last_regno;
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tcb_ptr = find_tcb (inferior_pid);
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old_chain = save_inferior_pid ();
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inferior_pid = main_pid;
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if (tcb_ptr->state == cma__c_state_running)
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{
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child_ops.to_fetch_registers (regno);
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do_cleanups (old_chain);
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return;
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}
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if (regno == -1)
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{
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first_regno = 0;
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last_regno = NUM_REGS - 1;
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}
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else
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{
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first_regno = regno;
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last_regno = regno;
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}
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for (regno = first_regno; regno <= last_regno; regno++)
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{
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if (regmap[regno] == -1)
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child_ops.to_fetch_registers (regno);
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else
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{
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unsigned char buf[MAX_REGISTER_RAW_SIZE];
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CORE_ADDR sp;
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sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
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if (regno == FLAGS_REGNUM)
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/* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
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memset (buf, '\000', REGISTER_RAW_SIZE (regno));
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else if (regno == SP_REGNUM)
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store_address (buf, sizeof sp, sp);
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else if (regno == PC_REGNUM)
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read_memory (sp - 20, buf, REGISTER_RAW_SIZE (regno));
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else
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read_memory (sp + regmap[regno], buf, REGISTER_RAW_SIZE (regno));
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supply_register (regno, buf);
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}
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}
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do_cleanups (old_chain);
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}
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static void
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hpux_thread_store_registers (regno)
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int regno;
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{
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cma__t_int_tcb tcb, *tcb_ptr;
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struct cleanup *old_chain;
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int i;
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int first_regno, last_regno;
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tcb_ptr = find_tcb (inferior_pid);
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old_chain = save_inferior_pid ();
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inferior_pid = main_pid;
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if (tcb_ptr->state == cma__c_state_running)
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{
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child_ops.to_store_registers (regno);
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do_cleanups (old_chain);
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return;
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}
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if (regno == -1)
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{
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first_regno = 0;
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last_regno = NUM_REGS - 1;
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}
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else
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{
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first_regno = regno;
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last_regno = regno;
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}
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for (regno = first_regno; regno <= last_regno; regno++)
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{
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if (regmap[regno] == -1)
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child_ops.to_store_registers (regno);
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else
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||
{
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unsigned char buf[MAX_REGISTER_RAW_SIZE];
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CORE_ADDR sp;
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sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
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if (regno == FLAGS_REGNUM)
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child_ops.to_store_registers (regno); /* Let lower layer handle this... */
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else if (regno == SP_REGNUM)
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{
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write_memory ((CORE_ADDR)&tcb_ptr->static_ctx.sp,
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registers + REGISTER_BYTE (regno),
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REGISTER_RAW_SIZE (regno));
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tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *)
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(extract_address (registers + REGISTER_BYTE (regno), REGISTER_RAW_SIZE (regno)) + 160);
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}
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else if (regno == PC_REGNUM)
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write_memory (sp - 20,
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registers + REGISTER_BYTE (regno),
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REGISTER_RAW_SIZE (regno));
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else
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write_memory (sp + regmap[regno],
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registers + REGISTER_BYTE (regno),
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||
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. */
|
||
|
||
void
|
||
hpux_thread_new_objfile (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 ()
|
||
{
|
||
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;
|
||
}
|
||
|
||
struct target_ops hpux_thread_ops = {
|
||
"hpux-threads", /* to_shortname */
|
||
"HPUX threads and pthread.", /* to_longname */
|
||
"HPUX threads and pthread support.", /* to_doc */
|
||
hpux_thread_open, /* to_open */
|
||
0, /* to_close */
|
||
hpux_thread_attach, /* to_attach */
|
||
NULL, /* to_post_attach */
|
||
NULL, /* to_require_attach */
|
||
hpux_thread_detach, /* to_detach */
|
||
NULL, /* to_require_detach */
|
||
hpux_thread_resume, /* to_resume */
|
||
hpux_thread_wait, /* to_wait */
|
||
NULL, /* to_post_wait */
|
||
hpux_thread_fetch_registers, /* to_fetch_registers */
|
||
hpux_thread_store_registers, /* to_store_registers */
|
||
hpux_thread_prepare_to_store, /* to_prepare_to_store */
|
||
hpux_thread_xfer_memory, /* to_xfer_memory */
|
||
hpux_thread_files_info, /* to_files_info */
|
||
memory_insert_breakpoint, /* to_insert_breakpoint */
|
||
memory_remove_breakpoint, /* to_remove_breakpoint */
|
||
terminal_init_inferior, /* to_terminal_init */
|
||
terminal_inferior, /* to_terminal_inferior */
|
||
terminal_ours_for_output, /* to_terminal_ours_for_output */
|
||
terminal_ours, /* to_terminal_ours */
|
||
child_terminal_info, /* to_terminal_info */
|
||
hpux_thread_kill_inferior, /* to_kill */
|
||
0, /* to_load */
|
||
0, /* to_lookup_symbol */
|
||
hpux_thread_create_inferior, /* to_create_inferior */
|
||
NULL, /* to_post_startup_inferior */
|
||
NULL, /* to_acknowledge_created_inferior */
|
||
NULL, /* to_clone_and_follow_inferior */
|
||
NULL, /* to_post_follow_inferior_by_clone */
|
||
NULL, /* to_insert_fork_catchpoint */
|
||
NULL, /* to_remove_fork_catchpoint */
|
||
NULL, /* to_insert_vfork_catchpoint */
|
||
NULL, /* to_remove_vfork_catchpoint */
|
||
NULL, /* to_has_forked */
|
||
NULL, /* to_has_vforked */
|
||
NULL, /* to_can_follow_vfork_prior_to_exec */
|
||
NULL, /* to_post_follow_fork */
|
||
hpux_thread_mourn_inferior, /* to_mourn_inferior */
|
||
NULL, /* to_insert_exec_catchpoint */
|
||
NULL, /* to_remove_exec_catchpoint */
|
||
NULL, /* to_has_execd */
|
||
NULL, /* to_reported_exec_events_per_exec_call */
|
||
NULL, /* to_has_syscall_event */
|
||
NULL, /* to_has_exited */
|
||
hpux_thread_can_run, /* to_can_run */
|
||
hpux_thread_notice_signals, /* to_notice_signals */
|
||
hpux_thread_alive, /* to_thread_alive */
|
||
hpux_thread_stop, /* to_stop */
|
||
NULL, /* to_enable_exception_callback */
|
||
NULL, /* to_get_current_exception_event */
|
||
NULL, /* to_pid_to_exec_file */
|
||
NULL, /* to_core_file_to_sym_file */
|
||
process_stratum, /* to_stratum */
|
||
0, /* to_next */
|
||
1, /* to_has_all_memory */
|
||
1, /* to_has_memory */
|
||
1, /* to_has_stack */
|
||
1, /* to_has_registers */
|
||
1, /* to_has_execution */
|
||
0, /* sections */
|
||
0, /* sections_end */
|
||
OPS_MAGIC /* to_magic */
|
||
};
|
||
|
||
void
|
||
_initialize_hpux_thread ()
|
||
{
|
||
add_target (&hpux_thread_ops);
|
||
|
||
child_suppress_run = 1;
|
||
}
|