595 lines
16 KiB
C
595 lines
16 KiB
C
/* Low level interface for debugging HPUX/DCE threads for GDB, the GNU
|
||
debugger.
|
||
|
||
Copyright (C) 1996, 1998, 1999, 2000, 2001, 2004, 2007
|
||
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., 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, 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 "regcache.h"
|
||
#include <fcntl.h>
|
||
#include <string.h>
|
||
#include "gdb_stat.h"
|
||
#include "gdbcore.h"
|
||
#include "hppa-tdep.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 hpux_thread_resume (ptid_t ptid, int step,
|
||
enum target_signal signo);
|
||
|
||
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 (char *args, int from_tty)
|
||
{
|
||
deprecated_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 (char *args, int from_tty)
|
||
{
|
||
deprecated_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 (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;
|
||
|
||
#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
|
||
|
||
deprecated_child_ops.to_resume (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 (ptid_t ptid, struct target_waitstatus *ourstatus)
|
||
{
|
||
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 (ptid, ourstatus);
|
||
|
||
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 regcache *regcache, 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_ptid);
|
||
|
||
old_chain = save_inferior_ptid ();
|
||
|
||
inferior_ptid = main_ptid;
|
||
|
||
if (tcb_ptr->state == cma__c_state_running)
|
||
{
|
||
deprecated_child_ops.to_fetch_registers (regcache, 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)
|
||
deprecated_child_ops.to_fetch_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)
|
||
/* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
|
||
memset (buf, '\000', register_size (current_gdbarch, regno));
|
||
else if (regno == HPPA_SP_REGNUM)
|
||
store_unsigned_integer (buf, sizeof sp, sp);
|
||
else if (regno == HPPA_PCOQ_HEAD_REGNUM)
|
||
read_memory (sp - 20, buf, register_size (current_gdbarch, regno));
|
||
else
|
||
read_memory (sp + regmap[regno], buf, register_size (current_gdbarch, regno));
|
||
|
||
regcache_raw_supply (regcache, regno, buf);
|
||
}
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
static void
|
||
hpux_thread_store_registers (struct regcache *regcache, 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_ptid);
|
||
|
||
old_chain = save_inferior_ptid ();
|
||
|
||
inferior_ptid = main_ptid;
|
||
|
||
if (tcb_ptr->state == cma__c_state_running)
|
||
{
|
||
deprecated_child_ops.to_store_registers (regcache, 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)
|
||
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)
|
||
deprecated_child_ops.to_store_registers (regcache, regno); /* Let lower layer handle this... */
|
||
else if (regno == HPPA_SP_REGNUM)
|
||
{
|
||
regcache_raw_collect (regcache, regno, buf);
|
||
write_memory ((CORE_ADDR) &tcb_ptr->static_ctx.sp, buf,
|
||
register_size (current_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 (current_gdbarch, regno));
|
||
}
|
||
else
|
||
{
|
||
regcache_raw_collect (regcache, regno, buf);
|
||
write_memory (sp + regmap[regno], buf,
|
||
register_size (current_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 (void)
|
||
{
|
||
deprecated_child_ops.to_kill ();
|
||
}
|
||
|
||
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 (char *exec_file, char *allargs, char **env,
|
||
int from_tty)
|
||
{
|
||
deprecated_child_ops.to_create_inferior (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. */
|
||
|
||
/* 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) (struct objfile *);
|
||
|
||
void
|
||
hpux_thread_new_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 (void)
|
||
{
|
||
deprecated_child_ops.to_mourn_inferior ();
|
||
}
|
||
|
||
/* 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 (ptid_t ptid)
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
static void
|
||
hpux_thread_stop (void)
|
||
{
|
||
deprecated_child_ops.to_stop ();
|
||
}
|
||
|
||
/* 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 = 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 (void)
|
||
{
|
||
init_hpux_thread_ops ();
|
||
add_target (&hpux_thread_ops);
|
||
|
||
child_suppress_run = 1;
|
||
/* Hook into new_objfile notification. */
|
||
target_new_objfile_chain = deprecated_target_new_objfile_hook;
|
||
deprecated_target_new_objfile_hook = hpux_thread_new_objfile;
|
||
}
|