Many changes to procfs.c, mostly to expand the "info proc" command and to

fix a couple of small bugs.  Changes to other files mostly to fix minor
things pointed out by the SGI compiler.  See ChangeLog for complete details.

6 files changed, 2140 insertions, 125 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e942081..a25d9d3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,70 @@
+Wed Apr  1 11:39:52 1992  Fred Fish  (fnf@cygnus.com)
+
+	* breakpoint.h (bpdisp, bptype):  Remove trailing comma.
+	* symtab.h (current_source_symtab):  Make extern
+	* symtab.h (current_source_line): Make extern
+	* inferior.h:  Move all procfs.c prototypes to one place, add
+	prototype for proc_signal_handling_change.  Add prototypes for
+	signal_stop_state, signal_print_state, and signal_pass_state.
+	* inferior.h (stop_soon_quietly):  Make extern
+	* inferior.h (attach_flag):  Make extern
+	* infrun.c (NOTICE_SIGNAL_HANDLING_CHANGE):  Default is null.
+	* infrun.c (signal_stop_state, signal_print_state,
+	signal_pass_state):  New functions to query specific signal
+	handling flags.
+	* infrun.c (handle_command):  Minor error message change, add
+	NOTICE_SIGNAL_HANDLING_CHANGE.
+	* procfs.c (open_proc_file):  Remove iris specific reset of
+	inherit-on-fork flag, moved to proc_set_exec_trap().
+	* procfs.c (proc_set_exec_trap):  Add SVR4 and iris code
+	to reset inherit-on-fork flag, bash comment to GNU form.
+	* procfs.c (proc_base_address, set_proc_siginfo,
+	fetch_core_registers):  Conform to code style.
+	* procfs.c (signame.h):  Include.
+	* procfs.c (MAX_SYSCALLS, syscall_table[], init_syscalltable(),
+	syscallname(), info_proc_syscalls()):  New macros, tables, and
+	functions to organize and report system call information.
+	* procfs.c (saved_fltset, saved_trace, saved_sighold,
+	saved_exitset, saved_entryset):  Add to procinfo struct.
+	* procfs.c (struct trans):  Add.
+	* procfs.c (pr_flag_table, pr_why_table, faults_table,
+	siginfo_table, errno_table):  Tables to translate numeric values
+	to symbolic names and short descriptions.
+	* procfs.c (signalname, info_proc_signals):  Add function and
+	prototype.
+	* procfs.c (proc_info):  Now info_proc.
+	* procfs.c (proc_info_address_map):  Now info_proc_mappings.
+	* procfs.c (info_proc_flags, info_proc_stop, info_proc_siginfo,
+	info_proc_faults, lookupname, lookupdesc, sigcodename,
+	sigcodedesc):  New functions.
+	* procfs.c (proc_signal_handling_change):  New function to set
+	the trace flags based on the state of gdb's signal handling flags.
+	* procfs.c (inferior_proc_init):  Call proc_signal_handling_change
+	and remove code to do PIOCSTRACE ioctl.
+	* procfs.c (attach, detach):  Preserve and restore process flags
+	using saved_* fields in procinfo struct.
+	* procfs.c (attach):  Call proc_signal_handling_change.
+	* procfs.c (info_proc):  Major rework to expand "info proc" cmd.
+	* procfs.c (proc_desc):  Update for latest changes.
+	* xm-irix4.h (CREATE_INFERIOR_HOOK):  Protect by USE_PROC_FS.
+	* xm-irix4.h (NOTICE_SIGNAL_HANDLING_CHANGE):  Add definition.
+	* xm-sysv4.h (NOTICE_SIGNAL_HANDLING_CHANGE):  Add definition.
+
+Tue Mar 31 18:38:28 1992  Fred Fish  (fnf@cygnus.com)
+
+	* procfs.c (set_proc_siginfo):  Add prototype and new function.
+	* procfs.c (detach, child_resume):  Call set_proc_siginfo to set
+	up inferior siginfo struct.
+	* elfread.c (elf_symfile_read):  Compute the relocation amount
+	by subtracting off the address of the ".text" section.
+	* solib.c:  Add pointer to ".text" section to so_list struct.
+	* solib.c (solib_map_sections):  Initialize pointer to ".text"
+	section in so_list struct.
+	* solib.c (symbol_add_stub):  Pass base address of ".text"
+	section to symbol_file_add, rather than the load address of
+	the shared library.  On SunOS they are the same.  On SVR4 they
+	are not.
+
 Tue Mar 31 17:48:15 1992  Stu Grossman  (grossman at cygnus.com)
 
 	* mipsread.c (parse_procedure):  PDR.isym should get pointer to
diff --git a/gdb/inferior.h b/gdb/inferior.h
index eed848c..ce92228 100644
--- a/gdb/inferior.h
+++ b/gdb/inferior.h
@@ -1,6 +1,6 @@
 /* Variables that describe the inferior process running under GDB:
    Where it is, why it stopped, and how to step it.
-   Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+   Copyright 1986, 1989, 1992 Free Software Foundation, Inc.
 
 This file is part of GDB.
 
@@ -18,6 +18,12 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#if !defined (INFERIOR_H)
+#define INFERIOR_H 1
+
+/* For symtab_and_line */
+#include "symtab.h"
+
 /* For bpstat.  */
 #include "breakpoint.h"
 
@@ -57,7 +63,11 @@ struct inferior_status {
   int proceed_to_finish;
 };
 
-void save_inferior_status (), restore_inferior_status ();
+extern void
+save_inferior_status PARAMS ((struct inferior_status *, int));
+
+extern void
+restore_inferior_status PARAMS ((struct inferior_status *));
 
 /* File name for default use for standard in/out in the inferior.  */
 
@@ -71,29 +81,142 @@ extern int inferior_pid;
 
 extern char registers[];
 
-extern void clear_proceed_status ();
-extern void start_inferior ();
-extern void proceed ();
-extern void kill_inferior ();
-extern void kill_inferior_fast ();
-extern void generic_mourn_inferior ();
-extern void terminal_ours ();
-extern void detach ();
-extern void run_stack_dummy ();
-extern CORE_ADDR read_pc ();
-extern void write_pc ();
-extern void wait_for_inferior ();
-extern void init_wait_for_inferior ();
-extern void close_exec_file ();
-extern void reopen_exec_file ();
+extern void
+clear_proceed_status PARAMS ((void));
+
+extern void
+proceed PARAMS ((CORE_ADDR, int, int));
+
+extern void
+kill_inferior PARAMS ((void));
+
+extern void
+kill_inferior_fast PARAMS ((void));
+
+extern void
+generic_mourn_inferior PARAMS ((void));
+
+extern void
+terminal_ours PARAMS ((void));
+
+extern void
+run_stack_dummy PARAMS ((CORE_ADDR, char [REGISTER_BYTES]));
+
+extern CORE_ADDR
+read_pc PARAMS ((void));
+
+extern void
+write_pc PARAMS ((CORE_ADDR));
+
+extern void
+wait_for_inferior PARAMS ((void));
+
+extern void
+init_wait_for_inferior PARAMS ((void));
+
+extern void
+close_exec_file PARAMS ((void));
+
+extern void
+reopen_exec_file PARAMS ((void));
+
+/* From misc files */
+
+extern void
+store_inferior_registers PARAMS ((int));
+
+extern void
+fetch_inferior_registers PARAMS ((int));
+
+extern void 
+solib_create_inferior_hook PARAMS ((void));
+
+extern void
+child_mourn_inferior PARAMS ((void));
+
+extern void
+child_terminal_info PARAMS ((char *, int));
+
+extern void
+term_info PARAMS ((char *, int));
+
+extern void
+terminal_ours_for_output PARAMS ((void));
+
+extern void
+terminal_inferior PARAMS ((void));
+
+extern void
+terminal_init_inferior PARAMS ((void));
+
+/* From infptrace.c or procfs.c */
+
+extern int
+attach PARAMS ((int));
+
+void
+detach PARAMS ((int));
+
+extern void
+child_resume PARAMS ((int, int));
+
+/* From procfs.c */
+
+#ifdef USE_PROC_FS
+
+extern int
+proc_iterate_over_mappings PARAMS ((int (*) (int, CORE_ADDR)));
+
+extern int
+proc_wait PARAMS ((int *));
+
+extern void
+inferior_proc_init PARAMS ((int));
+
+extern void
+proc_signal_handling_change PARAMS ((void));
+
+extern void
+proc_set_exec_trap PARAMS ((void));
 
-/* From infcmd.c */
-void attach_command (
-#ifdef __STDC__
-		     char *arg, int from_tty
 #endif
-		     );
-		     
+
+/* From inflow.c */
+
+extern void
+new_tty_prefork PARAMS ((char *));
+
+/* From infrun.c */
+
+extern void
+start_remote PARAMS ((void));
+
+extern void
+child_create_inferior PARAMS ((char *, char *, char **));
+
+extern void
+child_attach PARAMS ((char *, int));
+
+extern void
+normal_stop PARAMS ((void));
+
+extern int
+signal_stop_state PARAMS ((int));
+
+extern int
+signal_print_state PARAMS ((int));
+
+extern int
+signal_pass_state PARAMS ((int));
+
+/* From infcmd.c */
+
+extern void
+tty_command PARAMS ((char *, int));
+
+extern void
+attach_command PARAMS ((char *, int));
+
 /* Last signal that the inferior received (why it stopped).  */
 
 extern int stop_signal;
@@ -157,7 +280,7 @@ extern int step_multi;
    when running in the shell before the child program has been exec'd;
    and when running some kinds of remote stuff (FIXME?).  */
 
-int stop_soon_quietly;
+extern int stop_soon_quietly;
 
 /* Nonzero if proceed is being used for a "finish" command or a similar
    situation when stop_registers should be saved.  */
@@ -179,7 +302,7 @@ extern int pc_changed;
 /* Nonzero if the child process in inferior_pid was attached rather
    than forked.  */
 
-int attach_flag;
+extern int attach_flag;
 
 /* Possible values for CALL_DUMMY_LOCATION.  */
 #define ON_STACK 1
@@ -195,11 +318,13 @@ int attach_flag;
    subtracted out.  */
 #if !defined (PC_IN_CALL_DUMMY)
 #if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
+extern CORE_ADDR text_end;
 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
   ((pc) >= text_end - CALL_DUMMY_LENGTH         \
    && (pc) < text_end + DECR_PC_AFTER_BREAK)
 #else /* Not before text_end.  */
 #if CALL_DUMMY_LOCATION == AFTER_TEXT_END
+extern CORE_ADDR text_end;
 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
   ((pc) >= text_end   \
    && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
@@ -209,3 +334,5 @@ int attach_flag;
 #endif /* On stack.  */
 #endif /* Not before text_end.  */
 #endif /* No PC_IN_CALL_DUMMY.  */
+
+#endif	/* !defined (INFERIOR_H) */
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 9bd4d3e..98e7227 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -158,6 +158,9 @@ resume_cleanups PARAMS ((int));
 
 extern char **environ;
 
+extern int sys_nerr;
+extern char *sys_errlist[];
+
 extern struct target_ops child_ops;	/* In inftarg.c */
 
 /* Sigtramp is a routine that the kernel calls (which then calls the
@@ -198,6 +201,12 @@ extern struct target_ops child_ops;	/* In inftarg.c */
 #define IN_SOLIB_TRAMPOLINE(pc,name)	0
 #endif
 
+/* Notify other parts of gdb that might care that signal handling may
+   have changed for one or more signals. */
+#ifndef NOTICE_SIGNAL_HANDLING_CHANGE
+#define NOTICE_SIGNAL_HANDLING_CHANGE	/* No actions */
+#endif
+
 #ifdef TDESC
 #include "tdesc.h"
 int safe_to_init_tdesc_context = 0;
@@ -466,8 +475,6 @@ child_create_inferior (exec_file, allargs, env)
 {
   int pid;
   char *shell_command;
-  extern int sys_nerr;
-  extern char *sys_errlist[];
   char *shell_file;
   static char default_shell_file[] = SHELL_FILE;
   int len;
@@ -1128,7 +1135,7 @@ wait_for_inferior ()
 #if 0
 	    if (* step_frame_address == 0
 		|| (step_frame_address == stop_frame_address))
-#endif 0
+#endif
 	      {
 		remove_step_breakpoint ();
 		step_resume_break_address = 0;
@@ -1579,6 +1586,24 @@ remove_step_breakpoint ()
 			      step_resume_break_shadow);
 }
 
+int signal_stop_state (signo)
+     int signo;
+{
+  return ((signo >= 0 && signo < NSIG) ? signal_stop[signo] : 0);
+}
+
+int signal_print_state (signo)
+     int signo;
+{
+  return ((signo >= 0 && signo < NSIG) ? signal_print[signo] : 0);
+}
+
+int signal_pass_state (signo)
+     int signo;
+{
+  return ((signo >= 0 && signo < NSIG) ? signal_program[signo] : 0);
+}
+
 static void
 sig_print_header ()
 {
@@ -1688,7 +1713,7 @@ handle_command (args, from_tty)
       /* Not a number and not a recognized flag word => complain.  */
       else
 	{
-	  error ("Unrecognized flag word: \"%s\".", p);
+	  error ("Unrecognized or ambiguous flag word: \"%s\".", p);
 	}
 
       /* Find start of next word.  */
@@ -1696,6 +1721,8 @@ handle_command (args, from_tty)
       while (*p == ' ' || *p == '\t') p++;
     }
 
+  NOTICE_SIGNAL_HANDLING_CHANGE;
+
   if (from_tty)
     {
       /* Show the results.  */
diff --git a/gdb/procfs.c b/gdb/procfs.c
index dc5ae10..407c65f 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -43,6 +43,9 @@ regardless of whether or not the actual target has floating point hardware.
 
 #include "inferior.h"
 #include "target.h"
+#include "signame.h"
+
+#define MAX_SYSCALLS	256	/* Maximum number of syscalls for table */
 
 #ifndef PROC_NAME_FMT
 #define PROC_NAME_FMT "/proc/%d"
@@ -52,6 +55,13 @@ regardless of whether or not the actual target has floating point hardware.
 CORE_ADDR kernel_u_addr;
 #endif
 
+#ifdef BROKEN_SIGINFO_H		/* Workaround broken SGS <sys/siginfo.h> */
+#undef si_pid
+#define si_pid _data._proc.pid
+#undef si_uid
+#define si_uid _data._proc._pdata._kill.uid
+#endif /* BROKEN_SIGINFO_H */
+
 /*  All access to the inferior, either one started by gdb or one that has
     been attached to, is controlled by an instance of a procinfo structure,
     defined below.  Since gdb currently only handles one inferior at a time,
@@ -75,15 +85,633 @@ struct procinfo {
   sigset_t trace;		/* Current traced signal set */
   sysset_t exitset;		/* Current traced system call exit set */
   sysset_t entryset;		/* Current traced system call entry set */
+  fltset_t saved_fltset;	/* Saved traced hardware fault set */
+  sigset_t saved_trace;		/* Saved traced signal set */
+  sigset_t saved_sighold;	/* Saved held signal set */
+  sysset_t saved_exitset;	/* Saved traced system call exit set */
+  sysset_t saved_entryset;	/* Saved traced system call entry set */
 };
 
 static struct procinfo pi;	/* Inferior's process information */
 
+/*  Much of the information used in the /proc interface, particularly for
+    printing status information, is kept as tables of structures of the
+    following form.  These tables can be used to map numeric values to
+    their symbolic names and to a string that describes their specific use. */
+
+struct trans {
+  int value;			/* The numeric value */
+  char *name;			/* The equivalent symbolic value */
+  char *desc;			/* Short description of value */
+};
+
+/*  Translate bits in the pr_flags member of the prstatus structure, into the
+    names and desc information. */
+
+static struct trans pr_flag_table[] =
+{
+#if defined (PR_STOPPED)
+  PR_STOPPED, "PR_STOPPED", "Process is stopped",
+#endif
+#if defined (PR_ISTOP)
+  PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest",
+#endif
+#if defined (PR_DSTOP)
+  PR_DSTOP, "PR_DSTOP", "A stop directive is in effect",
+#endif
+#if defined (PR_ASLEEP)
+  PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call",
+#endif
+#if defined (PR_FORK)
+  PR_FORK, "PR_FORK", "Inherit-on-fork is in effect",
+#endif
+#if defined (PR_RLC)
+  PR_RLC, "PR_RLC", "Run-on-last-close is in effect",
+#endif
+#if defined (PR_PTRACE)
+  PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace",
+#endif
+#if defined (PR_PCINVAL)
+  PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address",
+#endif
+#if defined (PR_ISSYS)
+  PR_ISSYS, "PR_ISSYS", "Is a system process",
+#endif
+ 0, NULL, NULL
+};
+
+/*  Translate values in the pr_why field of the prstatus struct. */
+
+static struct trans pr_why_table[] =
+{
+#if defined (PR_REQUESTED)
+ PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP",
+#endif
+#if defined (PR_SIGNALLED)
+ PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal",
+#endif
+#if defined (PR_FAULTED)
+ PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault",
+#endif
+#if defined (PR_SYSENTRY)
+ PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call",
+#endif
+#if defined (PR_SYSEXIT)
+ PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call",
+#endif
+#if defined (PR_JOBCONTROL)
+ PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action",
+#endif
+ 0, NULL, NULL
+};
+
+/*  Hardware fault translation table. */
+
+static struct trans faults_table[] =
+{
+#if defined (FLTILL)
+ FLTILL, "FLTILL", "Illegal instruction",
+#endif
+#if defined (FLTPRIV)
+ FLTPRIV, "FLTPRIV", "Privileged instruction",
+#endif
+#if defined (FLTBPT)
+ FLTBPT, "FLTBPT", "Breakpoint trap",
+#endif
+#if defined (FLTTRACE)
+ FLTTRACE, "FLTTRACE", "Trace trap",
+#endif
+#if defined (FLTACCESS)
+ FLTACCESS, "FLTACCESS", "Memory access fault",
+#endif
+#if defined (FLTBOUNDS)
+ FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation",
+#endif
+#if defined (FLTIOVF)
+ FLTIOVF, "FLTIOVF", "Integer overflow",
+#endif
+#if defined (FLTIZDIV)
+ FLTIZDIV, "FLTIZDIV", "Integer zero divide",
+#endif
+#if defined (FLTFPE)
+ FLTFPE, "FLTFPE", "Floating-point exception",
+#endif
+#if defined (FLTSTACK)
+ FLTSTACK, "FLTSTACK", "Unrecoverable stack fault",
+#endif
+#if defined (FLTPAGE)
+ FLTPAGE, "FLTPAGE", "Recoverable page fault",
+#endif
+ 0, NULL, NULL
+};
+
+/* Translation table for signal generation information.  See UNIX System
+   V Release 4 Programmer's Reference Manual, siginfo(5).  */
+
+static struct sigcode {
+  int signo;
+  int code;
+  char *codename;
+  char *desc;
+} siginfo_table[] = {
+#if defined (SIGILL) && defined (ILL_ILLOPC)
+  SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode",
+#endif
+#if defined (SIGILL) && defined (ILL_ILLOPN)
+  SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
+#endif
+#if defined (SIGILL) && defined (ILL_ILLADR)
+  SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode",
+#endif
+#if defined (SIGILL) && defined (ILL_ILLTRP)
+  SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap",
+#endif
+#if defined (SIGILL) && defined (ILL_PRVOPC)
+  SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode",
+#endif
+#if defined (SIGILL) && defined (ILL_PRVREG)
+  SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register",
+#endif
+#if defined (SIGILL) && defined (ILL_COPROC)
+  SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error",
+#endif
+#if defined (SIGILL) && defined (ILL_BADSTK)
+  SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error",
+#endif
+#if defined (SIGFPE) && defined (FPE_INTDIV)
+  SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero",
+#endif
+#if defined (SIGFPE) && defined (FPE_INTOVF)
+  SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTDIV)
+  SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTOVF)
+  SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTUND)
+  SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTRES)
+  SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTINV)
+  SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation",
+#endif
+#if defined (SIGFPE) && defined (FPE_FLTSUB)
+  SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range",
+#endif
+#if defined (SIGSEGV) && defined (SEGV_MAPERR)
+  SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object",
+#endif
+#if defined (SIGSEGV) && defined (SEGV_ACCERR)
+  SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object",
+#endif
+#if defined (SIGBUS) && defined (BUS_ADRALN)
+  SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment",
+#endif
+#if defined (SIGBUS) && defined (BUS_ADRERR)
+  SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address",
+#endif
+#if defined (SIGBUS) && defined (BUS_OBJERR)
+  SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error",
+#endif
+#if defined (SIGTRAP) && defined (TRAP_BRKPT)
+  SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint",
+#endif
+#if defined (SIGTRAP) && defined (TRAP_TRACE)
+  SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap",
+#endif
+#if defined (SIGCLD) && defined (CLD_EXITED)
+  SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited",
+#endif
+#if defined (SIGCLD) && defined (CLD_KILLED)
+  SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed",
+#endif
+#if defined (SIGCLD) && defined (CLD_DUMPED)
+  SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally",
+#endif
+#if defined (SIGCLD) && defined (CLD_TRAPPED)
+  SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped",
+#endif
+#if defined (SIGCLD) && defined (CLD_STOPPED)
+  SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped",
+#endif
+#if defined (SIGCLD) && defined (CLD_CONTINUED)
+  SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued",
+#endif
+#if defined (SIGPOLL) && defined (POLL_IN)
+  SIGPOLL, POLL_IN, "POLL_IN", "Input input available",
+#endif
+#if defined (SIGPOLL) && defined (POLL_OUT)
+  SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available",
+#endif
+#if defined (SIGPOLL) && defined (POLL_MSG)
+  SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available",
+#endif
+#if defined (SIGPOLL) && defined (POLL_ERR)
+  SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error",
+#endif
+#if defined (SIGPOLL) && defined (POLL_PRI)
+  SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available",
+#endif
+#if defined (SIGPOLL) && defined (POLL_HUP)
+  SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected",
+#endif
+  0, 0, NULL, NULL
+};
+
+/* Translation table for errno values.  See intro(2) in most UNIX systems
+   Programmers Reference Manuals.
+
+   Note that some systems provide a function (strerror) that returns the
+   error message string, or a global variable that is the base address of the
+   array of character pointers.  Perhaps we should try to make use of these
+   provided strings if they are present, but at least this is more portable.
+   (FIXME?) */
+
+static struct trans errno_table[] =
+{
+#if defined (EPERM)
+  EPERM, "EPERM", "Not super-user",
+#endif
+#if defined (ENOENT)
+  ENOENT, "ENOENT", "No such file or directory",
+#endif
+#if defined (ESRCH)
+  ESRCH, "ESRCH", "No such process",
+#endif
+#if defined (EINTR)
+  EINTR, "EINTR", "Interrupted system call",
+#endif
+#if defined (EIO)
+  EIO, "EIO", "I/O error",
+#endif
+#if defined (ENXIO)
+  ENXIO, "ENXIO", "No such device or address",
+#endif
+#if defined (E2BIG)
+  E2BIG, "E2BIG", "Arg list too long",
+#endif
+#if defined (ENOEXEC)
+  ENOEXEC, "ENOEXEC", "Exec format error",
+#endif
+#if defined (EBADF)
+  EBADF, "EBADF", "Bad file number",
+#endif
+#if defined (ECHILD)
+  ECHILD, "ECHILD", "No child process",
+#endif
+#if defined (EAGAIN)
+  EAGAIN, "EAGAIN", "No more processes",
+#endif
+#if defined (ENOMEM)
+  ENOMEM, "ENOMEM", "Not enough space",
+#endif
+#if defined (EACCES)
+  EACCES, "EACCES", "Permission denied",
+#endif
+#if defined (EFAULT)
+  EFAULT, "EFAULT", "Bad address",
+#endif
+#if defined (ENOTBLK)
+  ENOTBLK, "ENOTBLK", "Block device required",
+#endif
+#if defined (EBUSY)
+  EBUSY, "EBUSY", "Device busy",
+#endif
+#if defined (EEXIST)
+  EEXIST, "EEXIST", "File exists",
+#endif
+#if defined (EXDEV)
+  EXDEV, "EXDEV", "Cross-device link",
+#endif
+#if defined (ENODEV)
+  ENODEV, "ENODEV", "No such device",
+#endif
+#if defined (ENOTDIR)
+  ENOTDIR, "ENOTDIR", "Not a directory",
+#endif
+#if defined (EISDIR)
+  EISDIR, "EISDIR", "Is a directory",
+#endif
+#if defined (EINVAL)
+  EINVAL, "EINVAL", "Invalid argument",
+#endif
+#if defined (ENFILE)
+  ENFILE, "ENFILE", "File table overflow",
+#endif
+#if defined (EMFILE)
+  EMFILE, "EMFILE", "Too many open files",
+#endif
+#if defined (ENOTTY)
+  ENOTTY, "ENOTTY", "Not a typewriter",
+#endif
+#if defined (ETXTBSY)
+  ETXTBSY, "ETXTBSY", "Text file busy",
+#endif
+#if defined (EFBIG)
+  EFBIG, "EFBIG", "File too large",
+#endif
+#if defined (ENOSPC)
+  ENOSPC, "ENOSPC", "No space left on device",
+#endif
+#if defined (ESPIPE)
+  ESPIPE, "ESPIPE", "Illegal seek",
+#endif
+#if defined (EROFS)
+  EROFS, "EROFS", "Read only file system",
+#endif
+#if defined (EMLINK)
+  EMLINK, "EMLINK", "Too many links",
+#endif
+#if defined (EPIPE)
+  EPIPE, "EPIPE", "Broken pipe",
+#endif
+#if defined (EDOM)
+  EDOM, "EDOM", "Math argument out of domain of func",
+#endif
+#if defined (ERANGE)
+  ERANGE, "ERANGE", "Math result not representable",
+#endif
+#if defined (ENOMSG)
+  ENOMSG, "ENOMSG", "No message of desired type",
+#endif
+#if defined (EIDRM)
+  EIDRM, "EIDRM", "Identifier removed",
+#endif
+#if defined (ECHRNG)
+  ECHRNG, "ECHRNG", "Channel number out of range",
+#endif
+#if defined (EL2NSYNC)
+  EL2NSYNC, "EL2NSYNC", "Level 2 not synchronized",
+#endif
+#if defined (EL3HLT)
+  EL3HLT, "EL3HLT", "Level 3 halted",
+#endif
+#if defined (EL3RST)
+  EL3RST, "EL3RST", "Level 3 reset",
+#endif
+#if defined (ELNRNG)
+  ELNRNG, "ELNRNG", "Link number out of range",
+#endif
+#if defined (EUNATCH)
+  EUNATCH, "EUNATCH", "Protocol driver not attached",
+#endif
+#if defined (ENOCSI)
+  ENOCSI, "ENOCSI", "No CSI structure available",
+#endif
+#if defined (EL2HLT)
+  EL2HLT, "EL2HLT", "Level 2 halted",
+#endif
+#if defined (EDEADLK)
+  EDEADLK, "EDEADLK", "Deadlock condition",
+#endif
+#if defined (ENOLCK)
+  ENOLCK, "ENOLCK", "No record locks available",
+#endif
+#if defined (EBADE)
+  EBADE, "EBADE", "Invalid exchange",
+#endif
+#if defined (EBADR)
+  EBADR, "EBADR", "Invalid request descriptor",
+#endif
+#if defined (EXFULL)
+  EXFULL, "EXFULL", "Exchange full",
+#endif
+#if defined (ENOANO)
+  ENOANO, "ENOANO", "No anode",
+#endif
+#if defined (EBADRQC)
+  EBADRQC, "EBADRQC", "Invalid request code",
+#endif
+#if defined (EBADSLT)
+  EBADSLT, "EBADSLT", "Invalid slot",
+#endif
+#if defined (EDEADLOCK)
+  EDEADLOCK, "EDEADLOCK", "File locking deadlock error",
+#endif
+#if defined (EBFONT)
+  EBFONT, "EBFONT", "Bad font file fmt",
+#endif
+#if defined (ENOSTR)
+  ENOSTR, "ENOSTR", "Device not a stream",
+#endif
+#if defined (ENODATA)
+  ENODATA, "ENODATA", "No data available",
+#endif
+#if defined (ETIME)
+  ETIME, "ETIME", "Timer expired",
+#endif
+#if defined (ENOSR)
+  ENOSR, "ENOSR", "Out of streams resources",
+#endif
+#if defined (ENONET)
+  ENONET, "ENONET", "Machine is not on the network",
+#endif
+#if defined (ENOPKG)
+  ENOPKG, "ENOPKG", "Package not installed",
+#endif
+#if defined (EREMOTE)
+  EREMOTE, "EREMOTE", "Object is remote",
+#endif
+#if defined (ENOLINK)
+  ENOLINK, "ENOLINK", "Link has been severed",
+#endif
+#if defined (EADV)
+  EADV, "EADV", "Advertise error",
+#endif
+#if defined (ESRMNT)
+  ESRMNT, "ESRMNT", "Srmount error",
+#endif
+#if defined (ECOMM)
+  ECOMM, "ECOMM", "Communication error on send",
+#endif
+#if defined (EPROTO)
+  EPROTO, "EPROTO", "Protocol error",
+#endif
+#if defined (EMULTIHOP)
+  EMULTIHOP, "EMULTIHOP", "Multihop attempted",
+#endif
+#if defined (EDOTDOT)
+  EDOTDOT, "EDOTDOT", "RFS specific error",
+#endif
+#if defined (EBADMSG)
+  EBADMSG, "EBADMSG", "Not a data message",
+#endif
+#if defined (ENAMETOOLONG)
+  ENAMETOOLONG, "ENAMETOOLONG", "File name too long",
+#endif
+#if defined (EOVERFLOW)
+  EOVERFLOW, "EOVERFLOW", "Value too large for defined data type",
+#endif
+#if defined (ENOTUNIQ)
+  ENOTUNIQ, "ENOTUNIQ", "Name not unique on network",
+#endif
+#if defined (EBADFD)
+  EBADFD, "EBADFD", "File descriptor in bad state",
+#endif
+#if defined (EREMCHG)
+  EREMCHG, "EREMCHG", "Remote address changed",
+#endif
+#if defined (ELIBACC)
+  ELIBACC, "ELIBACC", "Cannot access a needed shared library",
+#endif
+#if defined (ELIBBAD)
+  ELIBBAD, "ELIBBAD", "Accessing a corrupted shared library",
+#endif
+#if defined (ELIBSCN)
+  ELIBSCN, "ELIBSCN", ".lib section in a.out corrupted",
+#endif
+#if defined (ELIBMAX)
+  ELIBMAX, "ELIBMAX", "Attempting to link in too many shared libraries",
+#endif
+#if defined (ELIBEXEC)
+  ELIBEXEC, "ELIBEXEC", "Cannot exec a shared library directly",
+#endif
+#if defined (EILSEQ)
+  EILSEQ, "EILSEQ", "Illegal byte sequence",
+#endif
+#if defined (ENOSYS)
+  ENOSYS, "ENOSYS", "Operation not applicable",
+#endif
+#if defined (ELOOP)
+  ELOOP, "ELOOP", "Too many symbolic links encountered",
+#endif
+#if defined (ERESTART)
+  ERESTART, "ERESTART", "Interrupted system call should be restarted",
+#endif
+#if defined (ESTRPIPE)
+  ESTRPIPE, "ESTRPIPE", "Streams pipe error",
+#endif
+#if defined (ENOTEMPTY)
+  ENOTEMPTY, "ENOTEMPTY", "Directory not empty",
+#endif
+#if defined (EUSERS)
+  EUSERS, "EUSERS", "Too many users",
+#endif
+#if defined (ENOTSOCK)
+  ENOTSOCK, "ENOTSOCK", "Socket operation on non-socket",
+#endif
+#if defined (EDESTADDRREQ)
+  EDESTADDRREQ, "EDESTADDRREQ", "Destination address required",
+#endif
+#if defined (EMSGSIZE)
+  EMSGSIZE, "EMSGSIZE", "Message too long",
+#endif
+#if defined (EPROTOTYPE)
+  EPROTOTYPE, "EPROTOTYPE", "Protocol wrong type for socket",
+#endif
+#if defined (ENOPROTOOPT)
+  ENOPROTOOPT, "ENOPROTOOPT", "Protocol not available",
+#endif
+#if defined (EPROTONOSUPPORT)
+  EPROTONOSUPPORT, "EPROTONOSUPPORT", "Protocol not supported",
+#endif
+#if defined (ESOCKTNOSUPPORT)
+  ESOCKTNOSUPPORT, "ESOCKTNOSUPPORT", "Socket type not supported",
+#endif
+#if defined (EOPNOTSUPP)
+  EOPNOTSUPP, "EOPNOTSUPP", "Operation not supported on transport endpoint ",
+#endif
+#if defined (EPFNOSUPPORT)
+  EPFNOSUPPORT, "EPFNOSUPPORT", "Protocol family not supported",
+#endif
+#if defined (EAFNOSUPPORT)
+  EAFNOSUPPORT, "EAFNOSUPPORT", "Address family not supported by protocol",
+#endif
+#if defined (EADDRINUSE)
+  EADDRINUSE, "EADDRINUSE", "Address already in use",
+#endif
+#if defined (EADDRNOTAVAIL)
+  EADDRNOTAVAIL, "EADDRNOTAVAIL","Cannot assign requested address",
+#endif
+#if defined (ENETDOWN)
+  ENETDOWN, "ENETDOWN", "Network is down",
+#endif
+#if defined (ENETUNREACH)
+  ENETUNREACH, "ENETUNREACH", "Network is unreachable",
+#endif
+#if defined (ENETRESET)
+  ENETRESET, "ENETRESET", "Network dropped connection because of reset",
+#endif
+#if defined (ECONNABORTED)
+  ECONNABORTED, "ECONNABORTED", "Software caused connection abort",
+#endif
+#if defined (ECONNRESET)
+  ECONNRESET, "ECONNRESET", "Connection reset by peer",
+#endif
+#if defined (ENOBUFS)
+  ENOBUFS, "ENOBUFS", "No buffer space available",
+#endif
+#if defined (EISCONN)
+  EISCONN, "EISCONN", "Transport endpoint is already connected",
+#endif
+#if defined (ENOTCONN)
+  ENOTCONN, "ENOTCONN", "Transport endpoint is not connected",
+#endif
+#if defined (ESHUTDOWN)
+  ESHUTDOWN, "ESHUTDOWN", "Cannot send after transport endpoint shutdown",
+#endif
+#if defined (ETOOMANYREFS)
+  ETOOMANYREFS, "ETOOMANYREFS", "Too many references: cannot splice",
+#endif
+#if defined (ETIMEDOUT)
+  ETIMEDOUT, "ETIMEDOUT", "Connection timed out",
+#endif
+#if defined (ECONNREFUSED)
+  ECONNREFUSED, "ECONNREFUSED", "Connection refused",
+#endif
+#if defined (EHOSTDOWN)
+  EHOSTDOWN, "EHOSTDOWN", "Host is down",
+#endif
+#if defined (EHOSTUNREACH)
+  EHOSTUNREACH, "EHOSTUNREACH", "No route to host",
+#endif
+#if defined (EWOULDBLOCK)
+  EWOULDBLOCK, "EWOULDBLOCK", "Operation already in progress",
+#endif
+#if defined (EINPROGRESS)
+  EINPROGRESS, "EINPROGRESS", "Operation now in progress",
+#endif
+#if defined (ESTALE)
+  ESTALE, "ESTALE", "Stale NFS file handle",
+#endif
+#if defined (EUCLEAN)
+  EUCLEAN, "EUCLEAN", "Structure needs cleaning",
+#endif
+#if defined (ENOTNAM)
+  ENOTNAM, "ENOTNAM", "Not a XENIX named type file",
+#endif
+#if defined (ENAVAIL)
+  ENAVAIL, "ENAVAIL", "No XENIX semaphores available",
+#endif
+#if defined (EISNAM)
+  EISNAM, "EISNAM", "Is a named type file",
+#endif
+#if defined (EREMOTEIO)
+  EREMOTEIO, "EREMOTEIO", "Remote I/O error",
+#endif
+ 0, NULL, NULL
+};
+
+static char *syscall_table[MAX_SYSCALLS];
+
 /* Prototypes for local functions */
 
 static void
 set_proc_siginfo PARAMS ((struct procinfo *, int));
 
+static void
+init_syscall_table PARAMS ((void));
+
+static char *
+syscallname PARAMS ((int));
+
+static char *
+signalname PARAMS ((int));
+
 static int
 proc_address_to_fd PARAMS ((CORE_ADDR, int));
 
@@ -100,14 +728,38 @@ static void
 proc_init_failed PARAMS ((char *));
 
 static void
-proc_info PARAMS ((char *, int));
+info_proc PARAMS ((char *, int));
+
+static void
+info_proc_flags PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_stop PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_siginfo PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_syscalls PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_mappings PARAMS ((struct procinfo *, int));
 
 static void
-proc_info_address_map PARAMS ((struct procinfo *, int));
+info_proc_signals PARAMS ((struct procinfo *, int));
+
+static void
+info_proc_faults PARAMS ((struct procinfo *, int));
 
 static char *
 mappingflags PARAMS ((long));
 
+static char *
+lookupname PARAMS ((struct trans *, unsigned int, char *));
+
+static char *
+lookupdesc PARAMS ((struct trans *, unsigned int));
+
 /* External function prototypes that can't be easily included in any
    header file because the args are typedefs in system include files. */
 
@@ -123,6 +775,585 @@ supply_fpregset PARAMS ((fpregset_t *));
 extern void
 fill_fpregset PARAMS ((fpregset_t *, int));
 
+/*
+
+LOCAL FUNCTION
+
+	lookupdesc -- translate a value to a summary desc string
+
+SYNOPSIS
+
+	static char *lookupdesc (struct trans *transp, unsigned int val);
+
+DESCRIPTION
+	
+	Given a pointer to a translation table and a value to be translated,
+	lookup the desc string and return it.
+ */
+
+static char *
+lookupdesc (transp, val)
+     struct trans *transp;
+     unsigned int val;
+{
+  char *desc;
+  
+  for (desc = NULL; transp -> name != NULL; transp++)
+    {
+      if (transp -> value == val)
+	{
+	  desc = transp -> desc;
+	  break;
+	}
+    }
+
+  /* Didn't find a translation for the specified value, set a default one. */
+
+  if (desc == NULL)
+    {
+      desc = "Unknown";
+    }
+  return (desc);
+}
+
+/*
+
+LOCAL FUNCTION
+
+	lookupname -- translate a value to symbolic name
+
+SYNOPSIS
+
+	static char *lookupname (struct trans *transp, unsigned int val,
+				 char *prefix);
+
+DESCRIPTION
+	
+	Given a pointer to a translation table, a value to be translated,
+	and a default prefix to return if the value can't be translated,
+	match the value with one of the translation table entries and
+	return a pointer to the symbolic name.
+
+	If no match is found it just returns the value as a printable string,
+	with the given prefix.  The previous such value, if any, is freed
+	at this time.
+ */
+
+static char *
+lookupname (transp, val, prefix)
+     struct trans *transp;
+     unsigned int val;
+     char *prefix;
+{
+  static char *locbuf;
+  char *name;
+  
+  for (name = NULL; transp -> name != NULL; transp++)
+    {
+      if (transp -> value == val)
+	{
+	  name = transp -> name;
+	  break;
+	}
+    }
+
+  /* Didn't find a translation for the specified value, build a default
+     one using the specified prefix and return it.  The lifetime of
+     the value is only until the next one is needed. */
+
+  if (name == NULL)
+    {
+      if (locbuf != NULL)
+	{
+	  free (locbuf);
+	}
+      locbuf = xmalloc (strlen (prefix) + 16);
+      (void) sprintf (locbuf, "%s %u", prefix, val);
+      name = locbuf;
+    }
+  return (name);
+}
+
+static char *
+sigcodename (sip)
+     siginfo_t *sip;
+{
+  struct sigcode *scp;
+  char *name = NULL;
+  static char locbuf[32];
+  
+  for (scp = siginfo_table; scp -> codename != NULL; scp++)
+    {
+      if ((scp -> signo == sip -> si_signo) &&
+	  (scp -> code == sip -> si_code))
+	{
+	  name = scp -> codename;
+	  break;
+	}
+    }
+  if (name == NULL)
+    {
+      (void) sprintf (locbuf, "sigcode %u", sip -> si_signo);
+      name = locbuf;
+    }
+  return (name);
+}
+
+static char *sigcodedesc (sip)
+     siginfo_t *sip;
+{
+  struct sigcode *scp;
+  char *desc = NULL;
+  
+  for (scp = siginfo_table; scp -> codename != NULL; scp++)
+    {
+      if ((scp -> signo == sip -> si_signo) &&
+	  (scp -> code == sip -> si_code))
+	{
+	  desc = scp -> desc;
+	  break;
+	}
+    }
+  if (desc == NULL)
+    {
+      desc = "Unrecognized signal or trap use";
+    }
+  return (desc);
+}
+
+/*
+
+LOCAL FUNCTION
+
+	syscallname - translate a system call number into a system call name
+
+SYNOPSIS
+
+	char *syscallname (int syscallnum)
+
+DESCRIPTION
+
+	Given a system call number, translate it into the printable name
+	of a system call, or into "syscall <num>" if it is an unknown
+	number.
+ */
+
+static char *
+syscallname (syscallnum)
+     int syscallnum;
+{
+  static char locbuf[32];
+  char *rtnval;
+  
+  if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS)
+    {
+      rtnval = syscall_table[syscallnum];
+    }
+  else
+    {
+      (void) sprintf (locbuf, "syscall %u", syscallnum);
+      rtnval = locbuf;
+    }
+  return (rtnval);
+}
+
+/*
+
+LOCAL FUNCTION
+
+	init_syscall_table - initialize syscall translation table
+
+SYNOPSIS
+
+	void init_syscall_table (void)
+
+DESCRIPTION
+
+	Dynamically initialize the translation table to convert system
+	call numbers into printable system call names.  Done once per
+	gdb run, on initialization.
+
+NOTES
+
+	This is awfully ugly, but preprocessor tricks to make it prettier
+	tend to be nonportable.
+ */
+
+static void
+init_syscall_table ()
+{
+  int syscallnum;
+  
+#if defined (SYS_exit)
+  syscall_table[SYS_exit] = "exit";
+#endif
+#if defined (SYS_fork)
+  syscall_table[SYS_fork] = "fork";
+#endif
+#if defined (SYS_read)
+  syscall_table[SYS_read] = "read";
+#endif
+#if defined (SYS_write)
+  syscall_table[SYS_write] = "write";
+#endif
+#if defined (SYS_open)
+  syscall_table[SYS_open] = "open";
+#endif
+#if defined (SYS_close)
+  syscall_table[SYS_close] = "close";
+#endif
+#if defined (SYS_wait)
+  syscall_table[SYS_wait] = "wait";
+#endif
+#if defined (SYS_creat)
+  syscall_table[SYS_creat] = "creat";
+#endif
+#if defined (SYS_link)
+  syscall_table[SYS_link] = "link";
+#endif
+#if defined (SYS_unlink)
+  syscall_table[SYS_unlink] = "unlink";
+#endif
+#if defined (SYS_exec)
+  syscall_table[SYS_exec] = "exec";
+#endif
+#if defined (SYS_execv)
+  syscall_table[SYS_execv] = "execv";
+#endif
+#if defined (SYS_execve)
+  syscall_table[SYS_execve] = "execve";
+#endif
+#if defined (SYS_chdir)
+  syscall_table[SYS_chdir] = "chdir";
+#endif
+#if defined (SYS_time)
+  syscall_table[SYS_time] = "time";
+#endif
+#if defined (SYS_mknod)
+  syscall_table[SYS_mknod] = "mknod";
+#endif
+#if defined (SYS_chmod)
+  syscall_table[SYS_chmod] = "chmod";
+#endif
+#if defined (SYS_chown)
+  syscall_table[SYS_chown] = "chown";
+#endif
+#if defined (SYS_brk)
+  syscall_table[SYS_brk] = "brk";
+#endif
+#if defined (SYS_stat)
+  syscall_table[SYS_stat] = "stat";
+#endif
+#if defined (SYS_lseek)
+  syscall_table[SYS_lseek] = "lseek";
+#endif
+#if defined (SYS_getpid)
+  syscall_table[SYS_getpid] = "getpid";
+#endif
+#if defined (SYS_mount)
+  syscall_table[SYS_mount] = "mount";
+#endif
+#if defined (SYS_umount)
+  syscall_table[SYS_umount] = "umount";
+#endif
+#if defined (SYS_setuid)
+  syscall_table[SYS_setuid] = "setuid";
+#endif
+#if defined (SYS_getuid)
+  syscall_table[SYS_getuid] = "getuid";
+#endif
+#if defined (SYS_stime)
+  syscall_table[SYS_stime] = "stime";
+#endif
+#if defined (SYS_ptrace)
+  syscall_table[SYS_ptrace] = "ptrace";
+#endif
+#if defined (SYS_alarm)
+  syscall_table[SYS_alarm] = "alarm";
+#endif
+#if defined (SYS_fstat)
+  syscall_table[SYS_fstat] = "fstat";
+#endif
+#if defined (SYS_pause)
+  syscall_table[SYS_pause] = "pause";
+#endif
+#if defined (SYS_utime)
+  syscall_table[SYS_utime] = "utime";
+#endif
+#if defined (SYS_stty)
+  syscall_table[SYS_stty] = "stty";
+#endif
+#if defined (SYS_gtty)
+  syscall_table[SYS_gtty] = "gtty";
+#endif
+#if defined (SYS_access)
+  syscall_table[SYS_access] = "access";
+#endif
+#if defined (SYS_nice)
+  syscall_table[SYS_nice] = "nice";
+#endif
+#if defined (SYS_statfs)
+  syscall_table[SYS_statfs] = "statfs";
+#endif
+#if defined (SYS_sync)
+  syscall_table[SYS_sync] = "sync";
+#endif
+#if defined (SYS_kill)
+  syscall_table[SYS_kill] = "kill";
+#endif
+#if defined (SYS_fstatfs)
+  syscall_table[SYS_fstatfs] = "fstatfs";
+#endif
+#if defined (SYS_pgrpsys)
+  syscall_table[SYS_pgrpsys] = "pgrpsys";
+#endif
+#if defined (SYS_xenix)
+  syscall_table[SYS_xenix] = "xenix";
+#endif
+#if defined (SYS_dup)
+  syscall_table[SYS_dup] = "dup";
+#endif
+#if defined (SYS_pipe)
+  syscall_table[SYS_pipe] = "pipe";
+#endif
+#if defined (SYS_times)
+  syscall_table[SYS_times] = "times";
+#endif
+#if defined (SYS_profil)
+  syscall_table[SYS_profil] = "profil";
+#endif
+#if defined (SYS_plock)
+  syscall_table[SYS_plock] = "plock";
+#endif
+#if defined (SYS_setgid)
+  syscall_table[SYS_setgid] = "setgid";
+#endif
+#if defined (SYS_getgid)
+  syscall_table[SYS_getgid] = "getgid";
+#endif
+#if defined (SYS_signal)
+  syscall_table[SYS_signal] = "signal";
+#endif
+#if defined (SYS_msgsys)
+  syscall_table[SYS_msgsys] = "msgsys";
+#endif
+#if defined (SYS_sys3b)
+  syscall_table[SYS_sys3b] = "sys3b";
+#endif
+#if defined (SYS_acct)
+  syscall_table[SYS_acct] = "acct";
+#endif
+#if defined (SYS_shmsys)
+  syscall_table[SYS_shmsys] = "shmsys";
+#endif
+#if defined (SYS_semsys)
+  syscall_table[SYS_semsys] = "semsys";
+#endif
+#if defined (SYS_ioctl)
+  syscall_table[SYS_ioctl] = "ioctl";
+#endif
+#if defined (SYS_uadmin)
+  syscall_table[SYS_uadmin] = "uadmin";
+#endif
+#if defined (SYS_utssys)
+  syscall_table[SYS_utssys] = "utssys";
+#endif
+#if defined (SYS_fsync)
+  syscall_table[SYS_fsync] = "fsync";
+#endif
+#if defined (SYS_umask)
+  syscall_table[SYS_umask] = "umask";
+#endif
+#if defined (SYS_chroot)
+  syscall_table[SYS_chroot] = "chroot";
+#endif
+#if defined (SYS_fcntl)
+  syscall_table[SYS_fcntl] = "fcntl";
+#endif
+#if defined (SYS_ulimit)
+  syscall_table[SYS_ulimit] = "ulimit";
+#endif
+#if defined (SYS_rfsys)
+  syscall_table[SYS_rfsys] = "rfsys";
+#endif
+#if defined (SYS_rmdir)
+  syscall_table[SYS_rmdir] = "rmdir";
+#endif
+#if defined (SYS_mkdir)
+  syscall_table[SYS_mkdir] = "mkdir";
+#endif
+#if defined (SYS_getdents)
+  syscall_table[SYS_getdents] = "getdents";
+#endif
+#if defined (SYS_sysfs)
+  syscall_table[SYS_sysfs] = "sysfs";
+#endif
+#if defined (SYS_getmsg)
+  syscall_table[SYS_getmsg] = "getmsg";
+#endif
+#if defined (SYS_putmsg)
+  syscall_table[SYS_putmsg] = "putmsg";
+#endif
+#if defined (SYS_poll)
+  syscall_table[SYS_poll] = "poll";
+#endif
+#if defined (SYS_lstat)
+  syscall_table[SYS_lstat] = "lstat";
+#endif
+#if defined (SYS_symlink)
+  syscall_table[SYS_symlink] = "symlink";
+#endif
+#if defined (SYS_readlink)
+  syscall_table[SYS_readlink] = "readlink";
+#endif
+#if defined (SYS_setgroups)
+  syscall_table[SYS_setgroups] = "setgroups";
+#endif
+#if defined (SYS_getgroups)
+  syscall_table[SYS_getgroups] = "getgroups";
+#endif
+#if defined (SYS_fchmod)
+  syscall_table[SYS_fchmod] = "fchmod";
+#endif
+#if defined (SYS_fchown)
+  syscall_table[SYS_fchown] = "fchown";
+#endif
+#if defined (SYS_sigprocmask)
+  syscall_table[SYS_sigprocmask] = "sigprocmask";
+#endif
+#if defined (SYS_sigsuspend)
+  syscall_table[SYS_sigsuspend] = "sigsuspend";
+#endif
+#if defined (SYS_sigaltstack)
+  syscall_table[SYS_sigaltstack] = "sigaltstack";
+#endif
+#if defined (SYS_sigaction)
+  syscall_table[SYS_sigaction] = "sigaction";
+#endif
+#if defined (SYS_sigpending)
+  syscall_table[SYS_sigpending] = "sigpending";
+#endif
+#if defined (SYS_context)
+  syscall_table[SYS_context] = "context";
+#endif
+#if defined (SYS_evsys)
+  syscall_table[SYS_evsys] = "evsys";
+#endif
+#if defined (SYS_evtrapret)
+  syscall_table[SYS_evtrapret] = "evtrapret";
+#endif
+#if defined (SYS_statvfs)
+  syscall_table[SYS_statvfs] = "statvfs";
+#endif
+#if defined (SYS_fstatvfs)
+  syscall_table[SYS_fstatvfs] = "fstatvfs";
+#endif
+#if defined (SYS_nfssys)
+  syscall_table[SYS_nfssys] = "nfssys";
+#endif
+#if defined (SYS_waitsys)
+  syscall_table[SYS_waitsys] = "waitsys";
+#endif
+#if defined (SYS_sigsendsys)
+  syscall_table[SYS_sigsendsys] = "sigsendsys";
+#endif
+#if defined (SYS_hrtsys)
+  syscall_table[SYS_hrtsys] = "hrtsys";
+#endif
+#if defined (SYS_acancel)
+  syscall_table[SYS_acancel] = "acancel";
+#endif
+#if defined (SYS_async)
+  syscall_table[SYS_async] = "async";
+#endif
+#if defined (SYS_priocntlsys)
+  syscall_table[SYS_priocntlsys] = "priocntlsys";
+#endif
+#if defined (SYS_pathconf)
+  syscall_table[SYS_pathconf] = "pathconf";
+#endif
+#if defined (SYS_mincore)
+  syscall_table[SYS_mincore] = "mincore";
+#endif
+#if defined (SYS_mmap)
+  syscall_table[SYS_mmap] = "mmap";
+#endif
+#if defined (SYS_mprotect)
+  syscall_table[SYS_mprotect] = "mprotect";
+#endif
+#if defined (SYS_munmap)
+  syscall_table[SYS_munmap] = "munmap";
+#endif
+#if defined (SYS_fpathconf)
+  syscall_table[SYS_fpathconf] = "fpathconf";
+#endif
+#if defined (SYS_vfork)
+  syscall_table[SYS_vfork] = "vfork";
+#endif
+#if defined (SYS_fchdir)
+  syscall_table[SYS_fchdir] = "fchdir";
+#endif
+#if defined (SYS_readv)
+  syscall_table[SYS_readv] = "readv";
+#endif
+#if defined (SYS_writev)
+  syscall_table[SYS_writev] = "writev";
+#endif
+#if defined (SYS_xstat)
+  syscall_table[SYS_xstat] = "xstat";
+#endif
+#if defined (SYS_lxstat)
+  syscall_table[SYS_lxstat] = "lxstat";
+#endif
+#if defined (SYS_fxstat)
+  syscall_table[SYS_fxstat] = "fxstat";
+#endif
+#if defined (SYS_xmknod)
+  syscall_table[SYS_xmknod] = "xmknod";
+#endif
+#if defined (SYS_clocal)
+  syscall_table[SYS_clocal] = "clocal";
+#endif
+#if defined (SYS_setrlimit)
+  syscall_table[SYS_setrlimit] = "setrlimit";
+#endif
+#if defined (SYS_getrlimit)
+  syscall_table[SYS_getrlimit] = "getrlimit";
+#endif
+#if defined (SYS_lchown)
+  syscall_table[SYS_lchown] = "lchown";
+#endif
+#if defined (SYS_memcntl)
+  syscall_table[SYS_memcntl] = "memcntl";
+#endif
+#if defined (SYS_getpmsg)
+  syscall_table[SYS_getpmsg] = "getpmsg";
+#endif
+#if defined (SYS_putpmsg)
+  syscall_table[SYS_putpmsg] = "putpmsg";
+#endif
+#if defined (SYS_rename)
+  syscall_table[SYS_rename] = "rename";
+#endif
+#if defined (SYS_uname)
+  syscall_table[SYS_uname] = "uname";
+#endif
+#if defined (SYS_setegid)
+  syscall_table[SYS_setegid] = "setegid";
+#endif
+#if defined (SYS_sysconfig)
+  syscall_table[SYS_sysconfig] = "sysconfig";
+#endif
+#if defined (SYS_adjtime)
+  syscall_table[SYS_adjtime] = "adjtime";
+#endif
+#if defined (SYS_systeminfo)
+  syscall_table[SYS_systeminfo] = "systeminfo";
+#endif
+#if defined (SYS_seteuid)
+  syscall_table[SYS_seteuid] = "seteuid";
+#endif
+}
 
 /*
 
@@ -397,6 +1628,7 @@ NOTES
 
 	If proc_init_failed ever gets called, control returns to the command
 	processing loop via the standard error handling code.
+
  */
 
 void
@@ -409,18 +1641,15 @@ inferior_proc_init (pid)
     }
   else
     {
-      (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
+      (void) memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
       prfillset (&pi.prrun.pr_trace);
+      proc_signal_handling_change ();
       prfillset (&pi.prrun.pr_fault);
       prdelset (&pi.prrun.pr_fault, FLTPAGE);
       if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
 	{
 	  proc_init_failed ("PIOCWSTOP failed");
 	}
-      else if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace) < 0)
-	{
-	  proc_init_failed ("PIOCSTRACE failed");
-	}
       else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
 	{
 	  proc_init_failed ("PIOCSFAULT failed");
@@ -432,6 +1661,58 @@ inferior_proc_init (pid)
 
 GLOBAL FUNCTION
 
+	proc_signal_handling_change
+
+SYNOPSIS
+
+	void proc_signal_handling_change (void);
+
+DESCRIPTION
+
+	When the user changes the state of gdb's signal handling via the
+	"handle" command, this function gets called to see if any change
+	in the /proc interface is required.  It is also called internally
+	by other /proc interface functions to initialize the state of
+	the traced signal set.
+
+	One thing it does is that signals for which the state is "nostop",
+	"noprint", and "pass", have their trace bits reset in the pr_trace
+	field, so that they are no longer traced.  This allows them to be
+	delivered directly to the inferior without the debugger ever being
+	involved.
+ */
+
+void
+proc_signal_handling_change ()
+{
+  int signo;
+
+  if (pi.valid)
+    {
+      for (signo = 0; signo < NSIG; signo++)
+	{
+	  if (signal_stop_state (signo) == 0 &&
+	      signal_print_state (signo) == 0 &&
+	      signal_pass_state (signo) == 1)
+	    {
+	      prdelset (&pi.prrun.pr_trace, signo);
+	    }
+	  else
+	    {
+	      praddset (&pi.prrun.pr_trace, signo);
+	    }
+	}
+      if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+	{
+	  print_sys_errmsg ("PIOCSTRACE failed", errno);
+	}
+    }
+}
+
+/*
+
+GLOBAL FUNCTION
+
 	proc_set_exec_trap -- arrange for exec'd child to halt at startup
 
 SYNOPSIS
@@ -453,6 +1734,10 @@ NOTE
 	We need to use all local variables since the child may be sharing
 	it's data space with the parent, if vfork was used rather than
 	fork.
+
+	Also note that we want to turn off the inherit-on-fork flag in
+	the child process so that any grand-children start with all
+	tracing flags cleared.
  */
 
 void
@@ -471,12 +1756,11 @@ proc_set_exec_trap ()
     }
   premptyset (&exitset);
 
-/*
- * GW: Rationale...
- * Not all systems with /proc have all the exec* syscalls with the same
- * names.  On the SGI, for example, there is no SYS_exec, but there
- * *is* a SYS_execv.  So, we try to account for that.
- */
+  /* GW: Rationale...
+     Not all systems with /proc have all the exec* syscalls with the same
+     names.  On the SGI, for example, there is no SYS_exec, but there
+     *is* a SYS_execv.  So, we try to account for that. */
+
 #ifdef SYS_exec
   praddset (&exitset, SYS_exec);
 #endif
@@ -493,6 +1777,21 @@ proc_set_exec_trap ()
       fflush (stderr);
       _exit (127);
     }
+
+  /* Turn off inherit-on-fork flag so that all grand-children of gdb
+     start with tracing flags cleared. */
+
+#ifdef PIOCRFORK	/* Standard SVR4 */
+  (void) ioctl (fd, PIOCRFORK, NULL);
+#else
+#ifdef PIOCRESET	/* iris (for example) */
+  {
+      long pr_flags;
+      pr_flags = PR_FORK;
+      (void) ioctl (fd, PIOCRESET, &pr_flags);
+  }
+#endif
+#endif
 }
 
 /*
@@ -567,7 +1866,7 @@ DESCRIPTION
 
 CORE_ADDR
 proc_base_address (addr)
-CORE_ADDR addr;
+     CORE_ADDR addr;
 {
   int nmap;
   struct prmap *prmaps;
@@ -597,7 +1896,7 @@ CORE_ADDR addr;
 
 /*
 
-GLOBAL_FUNCTION
+LOCAL FUNCTION
 
 	proc_address_to_fd -- return open fd for file mapped to address
 
@@ -704,15 +2003,17 @@ attach (pid)
   /*  Remember some things about the inferior that we will, or might, change
       so that we can restore them when we detach. */
   
-  (void) ioctl (pi.fd, PIOCGTRACE, &pi.trace);
-  (void) ioctl (pi.fd, PIOCGFAULT, &pi.fltset);
-  (void) ioctl (pi.fd, PIOCGENTRY, &pi.entryset);
-  (void) ioctl (pi.fd, PIOCGEXIT, &pi.exitset);
+  (void) ioctl (pi.fd, PIOCGTRACE, &pi.saved_trace);
+  (void) ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
+  (void) ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
+  (void) ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
+  (void) ioctl (pi.fd, PIOCGEXIT, &pi.saved_exitset);
   
   /* Set up trace and fault sets, as gdb expects them. */
   
   (void) memset (&pi.prrun, 0, sizeof (pi.prrun));
   prfillset (&pi.prrun.pr_trace);
+  proc_signal_handling_change ();
   prfillset (&pi.prrun.pr_fault);
   prdelset (&pi.prrun.pr_fault, FLTPAGE);
   if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
@@ -764,22 +2065,27 @@ detach (signal)
     {
       set_proc_siginfo (&pi, signal);
     }
-  if (ioctl (pi.fd, PIOCSEXIT, &pi.exitset) < 0)
+  if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
     {
       print_sys_errmsg (pi.pathname, errno);
       printf ("PIOCSEXIT failed.\n");
     }
-  if (ioctl (pi.fd, PIOCSENTRY, &pi.entryset) < 0)
+  if (ioctl (pi.fd, PIOCSENTRY, &pi.saved_entryset) < 0)
     {
       print_sys_errmsg (pi.pathname, errno);
       printf ("PIOCSENTRY failed.\n");
     }
-  if (ioctl (pi.fd, PIOCSTRACE, &pi.trace) < 0)
+  if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
     {
       print_sys_errmsg (pi.pathname, errno);
       printf ("PIOCSTRACE failed.\n");
     }
-  if (ioctl (pi.fd, PIOCSFAULT, &pi.fltset) < 0)
+  if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
+    {
+      print_sys_errmsg (pi.pathname, errno);
+      printf ("PIOSCHOLD failed.\n");
+    }
+  if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
     {
       print_sys_errmsg (pi.pathname, errno);
       printf ("PIOCSFAULT failed.\n");
@@ -1012,8 +2318,8 @@ DESCRIPTION
 
 static void
 set_proc_siginfo (pip, signo)
-  struct procinfo *pip;
-  int signo;
+     struct procinfo *pip;
+     int signo;
 {
   struct siginfo newsiginfo;
   struct siginfo *sip;
@@ -1050,7 +2356,7 @@ GLOBAL FUNCTION
 
 SYNOPSIS
 
-	void child_resume (int step, int signal)
+	void child_resume (int step, int signo)
 
 DESCRIPTION
 
@@ -1068,16 +2374,16 @@ NOTE
  */
 
 void
-child_resume (step, signal)
+child_resume (step, signo)
      int step;
-     int signal;
+     int signo;
 {
   errno = 0;
   pi.prrun.pr_flags = PRSVADDR | PRSTRACE | PRSFAULT | PRCFAULT;
   pi.prrun.pr_vaddr = (caddr_t) *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];
-  if (signal)
+  if (signo)
     {
-      set_proc_siginfo (&pi, signal);
+      set_proc_siginfo (&pi, signo);
     }
   else
     {
@@ -1154,10 +2460,10 @@ NOTES
 
 void
 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
-  char *core_reg_sect;
-  unsigned core_reg_size;
-  int which;
-  unsigned int reg_addr;	/* Unused in this version */
+     char *core_reg_sect;
+     unsigned core_reg_size;
+     int which;
+     unsigned int reg_addr;	/* Unused in this version */
 {
 
   if (which == 0)
@@ -1296,12 +2602,8 @@ open_proc_file (pid, pip)
   sprintf (pip -> pathname, PROC_NAME_FMT, pid);
   if ((pip -> fd = open (pip -> pathname, O_RDWR)) >= 0)
     {
-      long pr_flags;
-
       pip -> valid = 1;
       pip -> pid = pid;
-      pr_flags = PR_FORK;
-      (void) ioctl (pip -> fd, PIOCRESET, &pr_flags);
     }
   return (pip -> valid);
 }
@@ -1323,49 +2625,428 @@ mappingflags (flags)
 }
 
 static void
-proc_info_address_map (pip, verbose)
+info_proc_flags (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  struct trans *transp;
+
+  printf_filtered ("%-32s", "Process status flags:");
+  if (!summary)
+    {
+      printf_filtered ("\n\n");
+    }
+  for (transp = pr_flag_table; transp -> name != NULL; transp++)
+    {
+      if (pip -> prstatus.pr_flags & transp -> value)
+	{
+	  if (summary)
+	    {
+	      printf_filtered ("%s ", transp -> name);
+	    }
+	  else
+	    {
+	      printf_filtered ("\t%-16s %s.\n", transp -> name, transp -> desc);
+	    }
+	}
+    }
+  printf_filtered ("\n");
+}
+
+static void
+info_proc_stop (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  struct trans *transp;
+  int why;
+  int what;
+
+  why = pip -> prstatus.pr_why;
+  what = pip -> prstatus.pr_what;
+
+  if (pip -> prstatus.pr_flags & PR_STOPPED)
+    {
+      printf_filtered ("%-32s", "Reason for stopping:");
+      if (!summary)
+	{
+	  printf_filtered ("\n\n");
+	}
+      for (transp = pr_why_table; transp -> name != NULL; transp++)
+	{
+	  if (why == transp -> value)
+	    {
+	      if (summary)
+		{
+		  printf_filtered ("%s ", transp -> name);
+		}
+	      else
+		{
+		  printf_filtered ("\t%-16s %s.\n",
+				   transp -> name, transp -> desc);
+		}
+	      break;
+	    }
+	}
+      
+      /* Use the pr_why field to determine what the pr_what field means, and
+	 print more information. */
+      
+      switch (why)
+	{
+	  case PR_REQUESTED:
+	    /* pr_what is unused for this case */
+	    break;
+	  case PR_JOBCONTROL:
+	  case PR_SIGNALLED:
+	    if (summary)
+	      {
+		printf_filtered ("%s ", signalname (what));
+	      }
+	    else
+	      {
+		printf_filtered ("\t%-16s %s.\n", signalname (what),
+				 sys_siglist[what]);
+	      }
+	    break;
+	  case PR_SYSENTRY:
+	    if (summary)
+	      {
+		printf_filtered ("%s ", syscallname (what));
+	      }
+	    else
+	      {
+		printf_filtered ("\t%-16s %s.\n", syscallname (what),
+				 "Entered this system call");
+	      }
+	    break;
+	  case PR_SYSEXIT:
+	    if (summary)
+	      {
+		printf_filtered ("%s ", syscallname (what));
+	      }
+	    else
+	      {
+		printf_filtered ("\t%-16s %s.\n", syscallname (what),
+				 "Returned from this system call");
+	      }
+	    break;
+	  case PR_FAULTED:
+	    if (summary)
+	      {
+		printf_filtered ("%s ",
+				 lookupname (faults_table, what, "fault"));
+	      }
+	    else
+	      {
+		printf_filtered ("\t%-16s %s.\n",
+				 lookupname (faults_table, what, "fault"),
+				 lookupdesc (faults_table, what));
+	      }
+	    break;
+	  }
+      printf_filtered ("\n");
+    }
+}
+
+static void
+info_proc_siginfo (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  struct siginfo *sip;
+
+  if ((pip -> prstatus.pr_flags & PR_STOPPED) &&
+      (pip -> prstatus.pr_why == PR_SIGNALLED ||
+       pip -> prstatus.pr_why == PR_FAULTED))
+    {
+      printf_filtered ("%-32s", "Additional signal/fault info:");
+      sip = &pip -> prstatus.pr_info;
+      if (summary)
+	{
+	  printf_filtered ("%s ", signalname (sip -> si_signo));
+	  if (sip -> si_errno > 0)
+	    {
+	      printf_filtered ("%s ", lookupname (errno_table,
+						  sip -> si_errno, "errno"));
+	    }
+	  if (sip -> si_code <= 0)
+	    {
+	      printf_filtered ("sent by pid %d, uid %d ", sip -> si_pid,
+			       sip -> si_uid);
+	    }
+	  else
+	    {
+	      printf_filtered ("%s ", sigcodename (sip));
+	      if ((sip -> si_signo == SIGILL) ||
+		  (sip -> si_signo == SIGFPE) ||
+		  (sip -> si_signo == SIGSEGV) ||
+		  (sip -> si_signo == SIGBUS))
+		{
+		  printf_filtered ("addr=%#x ", sip -> si_addr);
+		}
+	      else if ((sip -> si_signo == SIGCHLD))
+		{
+		  printf_filtered ("child pid %u, status %u ",
+				   sip -> si_pid,
+				   sip -> si_status);
+		}
+	      else if ((sip -> si_signo == SIGPOLL))
+		{
+		  printf_filtered ("band %u ", sip -> si_band);
+		}
+	    }
+	}
+      else
+	{
+	  printf_filtered ("\n\n");
+	  printf_filtered ("\t%-16s %s.\n", signalname (sip -> si_signo),
+			   sys_siglist[sip -> si_signo]);
+	  if (sip -> si_errno > 0)
+	    {
+	      printf_filtered ("\t%-16s %s.\n",
+			       lookupname (errno_table,
+					   sip -> si_errno, "errno"),
+			       lookupdesc (errno_table, sip -> si_errno));
+	    }
+	  if (sip -> si_code <= 0)
+	    {
+	      printf_filtered ("\t%-16u %s\n", sip -> si_pid,
+			       "PID of process sending signal");
+	      printf_filtered ("\t%-16u %s\n", sip -> si_uid,
+			       "UID of process sending signal");
+	    }
+	  else
+	    {
+	      printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
+			       sigcodedesc (sip));
+	      if ((sip -> si_signo == SIGILL) ||
+		  (sip -> si_signo == SIGFPE))
+		{
+		  printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
+				   "Address of faulting instruction");
+		}
+	      else if ((sip -> si_signo == SIGSEGV) ||
+		       (sip -> si_signo == SIGBUS))
+		{
+		  printf_filtered ("\t%-16#x %s.\n", sip -> si_addr,
+				   "Address of faulting memory reference");
+		}
+	      else if ((sip -> si_signo == SIGCHLD))
+		{
+		  printf_filtered ("\t%-16u %s.\n", sip -> si_pid,
+				   "Child process ID");
+		  printf_filtered ("\t%-16u %s.\n", sip -> si_status,
+				   "Child process exit value or signal");
+		}
+	      else if ((sip -> si_signo == SIGPOLL))
+		{
+		  printf_filtered ("\t%-16u %s.\n", sip -> si_band,
+				   "Band event for POLL_{IN,OUT,MSG}");
+		}
+	    }
+	}
+      printf_filtered ("\n");
+    }
+}
+
+static void
+info_proc_syscalls (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  int syscallnum;
+
+  if (!summary)
+    {
+
+#if 0	/* FIXME:  Needs to use gdb-wide configured info about system calls. */
+      if (pip -> prstatus.pr_flags & PR_ASLEEP)
+	{
+	  int syscallnum = pip -> prstatus.pr_reg[R_D0];
+	  if (summary)
+	    {
+	      printf_filtered ("%-32s", "Sleeping in system call:");
+	      printf_filtered ("%s", syscallname (syscallnum));
+	    }
+	  else
+	    {
+	      printf_filtered ("Sleeping in system call '%s'.\n",
+			       syscallname (syscallnum));
+	    }
+	}
+#endif
+
+      if (ioctl (pip -> fd, PIOCGENTRY, &pip -> entryset) < 0)
+	{
+	  print_sys_errmsg (pip -> pathname, errno);
+	  error ("PIOCGENTRY failed");
+	}
+      
+      if (ioctl (pip -> fd, PIOCGEXIT, &pip -> exitset) < 0)
+	{
+	  print_sys_errmsg (pip -> pathname, errno);
+	  error ("PIOCGEXIT failed");
+	}
+      
+      printf_filtered ("System call tracing information:\n\n");
+      
+      printf_filtered ("\t%-12s %-8s %-8s\n",
+		       "System call",
+		       "Entry",
+		       "Exit");
+      for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
+	{
+	  QUIT;
+	  if (syscall_table[syscallnum] != NULL)
+	    {
+	      printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
+	      printf_filtered ("%-8s ",
+			       prismember (&pip -> entryset, syscallnum)
+			       ? "on" : "off");
+	      printf_filtered ("%-8s ",
+			       prismember (&pip -> exitset, syscallnum)
+			       ? "on" : "off");
+	      printf_filtered ("\n");
+	    }
+	  }
+      printf_filtered ("\n");
+    }
+}
+
+static char *
+signalname (signo)
+     int signo;
+{
+  char *abbrev;
+  static char locbuf[32];
+
+  abbrev = sig_abbrev (signo);
+  if (abbrev == NULL)
+    {
+      sprintf (locbuf, "signal %d", signo);
+    }
+  else
+    {
+      sprintf (locbuf, "SIG%s (%d)", abbrev, signo);
+    }
+  return (locbuf);
+}
+
+static void
+info_proc_signals (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  int signo;
+
+  if (!summary)
+    {
+      if (ioctl (pip -> fd, PIOCGTRACE, &pip -> trace) < 0)
+	{
+	  print_sys_errmsg (pip -> pathname, errno);
+	  error ("PIOCGTRACE failed");
+	}
+      
+      printf_filtered ("Disposition of signals:\n\n");
+      printf_filtered ("\t%-15s %-8s %-8s %-8s  %s\n\n",
+		       "Signal", "Trace", "Hold", "Pending", "Description");
+      for (signo = 0; signo < NSIG; signo++)
+	{
+	  QUIT;
+	  printf_filtered ("\t%-15s ", signalname (signo));
+	  printf_filtered ("%-8s ",
+			   prismember (&pip -> trace, signo)
+			   ? "on" : "off");
+	  printf_filtered ("%-8s ",
+			   prismember (&pip -> prstatus.pr_sighold, signo)
+			   ? "on" : "off");
+	  printf_filtered ("%-8s ",
+			   prismember (&pip -> prstatus.pr_sigpend, signo)
+			   ? "yes" : "no");
+	  printf_filtered (" %s\n", sys_siglist[signo]);
+	}
+      printf_filtered ("\n");
+    }
+}
+
+static void
+info_proc_faults (pip, summary)
+     struct procinfo *pip;
+     int summary;
+{
+  struct trans *transp;
+
+  if (!summary)
+    {
+      if (ioctl (pip -> fd, PIOCGFAULT, &pip -> fltset) < 0)
+	{
+	  print_sys_errmsg (pip -> pathname, errno);
+	  error ("PIOCGFAULT failed");
+	}
+      
+      printf_filtered ("Current traced hardware fault set:\n\n");
+      printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
+
+      for (transp = faults_table; transp -> name != NULL; transp++)
+	{
+	  QUIT;
+	  printf_filtered ("\t%-12s ", transp -> name);
+	  printf_filtered ("%-8s", prismember (&pip -> fltset, transp -> value)
+			   ? "on" : "off");
+	  printf_filtered ("\n");
+	}
+      printf_filtered ("\n");
+    }
+}
+
+static void
+info_proc_mappings (pip, summary)
      struct procinfo *pip;
-     int verbose;
+     int summary;
 {
   int nmap;
   struct prmap *prmaps;
   struct prmap *prmap;
 
-  printf_filtered ("Mapped address spaces:\n\n");
-  printf_filtered ("\t%10s %10s %10s %10s %6s\n",
-		   "Start Addr",
-		   "  End Addr",
-		   "      Size",
-		   "    Offset",
-		   "Flags");
-  if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
+  if (!summary)
     {
-      prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
-      if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
+      printf_filtered ("Mapped address spaces:\n\n");
+      printf_filtered ("\t%10s %10s %10s %10s %6s\n",
+		       "Start Addr",
+		       "  End Addr",
+		       "      Size",
+		       "    Offset",
+		       "Flags");
+      if (ioctl (pip -> fd, PIOCNMAP, &nmap) == 0)
 	{
-	  for (prmap = prmaps; prmap -> pr_size; ++prmap)
+	  prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+	  if (ioctl (pip -> fd, PIOCMAP, prmaps) == 0)
 	    {
-	      printf_filtered ("\t%#10x %#10x %#10x %#10x %6s\n",
-			       prmap -> pr_vaddr,
-			       prmap -> pr_vaddr + prmap -> pr_size - 1,
-			       prmap -> pr_size,
-			       prmap -> pr_off,
-			       mappingflags (prmap -> pr_mflags));
+	      for (prmap = prmaps; prmap -> pr_size; ++prmap)
+		{
+		  printf_filtered ("\t%#10x %#10x %#10x %#10x %6s\n",
+				   prmap -> pr_vaddr,
+				   prmap -> pr_vaddr + prmap -> pr_size - 1,
+				   prmap -> pr_size,
+				   prmap -> pr_off,
+				   mappingflags (prmap -> pr_mflags));
+		}
 	    }
 	}
+      printf_filtered ("\n");
     }
-  printf_filtered ("\n\n");
 }
 
 /*
 
 LOCAL FUNCTION
 
-	proc_info -- implement the "info proc" command
+	info_proc -- implement the "info proc" command
 
 SYNOPSIS
 
-	void proc_info (char *args, int from_tty)
+	void info_proc (char *args, int from_tty)
 
 DESCRIPTION
 
@@ -1374,24 +3055,39 @@ DESCRIPTION
 
 	Examples of the use of "info proc" are:
 
-	info proc		Print short info about current inferior.
-	info proc verbose	Print verbose info about current inferior.
-	info proc 123		Print short info about process pid 123.
-	info proc 123 verbose	Print verbose info about process pid 123.
+	info proc		(prints summary info for current inferior)
+	info proc 123		(prints summary info for process with pid 123)
+	info proc mappings	(prints address mappings)
+	info proc times		(prints process/children times)
+	info proc id		(prints pid, ppid, gid, sid, etc)
+	info proc status	(prints general process state info)
+	info proc signals	(prints info about signal handling)
+	info proc all		(prints all info)
 
  */
 
 static void
-proc_info (args, from_tty)
+info_proc (args, from_tty)
      char *args;
      int from_tty;
 {
-  int verbose = 0;
   int pid;
   struct procinfo pii;
   struct procinfo *pip;
   struct cleanup *old_chain;
   char *nexttok;
+  char **argv;
+  int argsize;
+  int summary = 1;
+  int flags = 0;
+  int syscalls = 0;
+  int signals = 0;
+  int faults = 0;
+  int mappings = 0;
+  int times = 0;
+  int id = 0;
+  int status = 0;
+  int all = 0;
 
   old_chain = make_cleanup (null_cleanup, 0);
 
@@ -1399,20 +3095,63 @@ proc_info (args, from_tty)
 
   pip = &pi;
 
-  /* Parse the args string, looking for "verbose" (or any abbrev) and
-     for a specific pid.  If a specific pid is found, the process
-     file is opened. */
-  
   if (args != NULL)
     {
-      while ((nexttok = strtok (args, " \t")) != NULL)
+      if ((argv = buildargv (args)) == NULL)
+	{
+	  nomem (0);
+	}
+      make_cleanup (freeargv, (char *) argv);
+
+      while (*argv != NULL)
 	{
-	  args = NULL;
-	  if (strncmp (nexttok, "verbose", strlen (nexttok)) == 0)
+	  argsize = strlen (*argv);
+	  if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
+	    {
+	      summary = 0;
+	      all = 1;
+	    }
+	  else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
+	    {
+	      summary = 0;
+	      faults = 1;
+	    }
+	  else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
+	    {
+	      summary = 0;
+	      flags = 1;
+	    }
+	  else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
+	    {
+	      summary = 0;
+	      id = 1;
+	    }
+	  else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
+	    {
+	      summary = 0;
+	      mappings = 1;
+	    }
+	  else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
+	    {
+	      summary = 0;
+	      signals = 1;
+	    }
+	  else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
+	    {
+	      summary = 0;
+	      status = 1;
+	    }
+	  else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
 	    {
-	      verbose++;
+	      summary = 0;
+	      syscalls = 1;
 	    }
-	  else if ((pii.pid = atoi (nexttok)) > 0)
+	  else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
+	    {
+	      summary = 0;
+	      times = 1;
+	    }
+	  else if ((pii.pid = atoi (*argv)) > 0)
 	    {
 	      pid = pii.pid;
 	      pip = &pii;
@@ -1424,6 +3163,11 @@ proc_info (args, from_tty)
 		}
 	      make_cleanup (close_proc_file, pip);
 	    }
+	  else if (**argv != '\000')
+	    {
+	      error ("Unrecognized or ambiguous keyword `%s'.", *argv);
+	    }
+	  argv++;
 	}
     }
 
@@ -1440,24 +3184,39 @@ proc_info (args, from_tty)
       error ("PIOCSTATUS failed");
     }
 
-  printf_filtered ("\nStatus information for %s:\n\n", pip -> pathname);
-  proc_info_address_map (pip, verbose);
-#if 0
-  proc_info_flags (pip, verbose);
-  proc_info_why (pip, verbose);
-  proc_info_what (pip, verbose);
-  proc_info_info (pip, verbose);
-  proc_info_cursig (pip, verbose);
-  proc_info_sigpend (pip, verbose);
-  proc_info_sighold (pip, verbose);
-  proc_info_altstack (pip, verbose);
-  proc_info_action (pip, verbose);
-  proc_info_id (pip, verbose);
-  proc_info_times (pip, verbose);
-  proc_info_clname (pip,verbose);
-  proc_info_instr (pip, verbose);
-  proc_info_reg (pip, verbose);
-#endif  
+  /* Print verbose information of the requested type(s), or just a summary
+     of the information for all types. */
+
+  printf_filtered ("\nInformation for %s:\n\n", pip -> pathname);
+  if (summary || all || flags)
+    {
+      info_proc_flags (pip, summary);
+    }
+  if (summary || all)
+    {
+      info_proc_stop (pip, summary);
+    }
+  if (summary || all || signals || faults)
+    {
+      info_proc_siginfo (pip, summary);
+    }
+  if (summary || all || syscalls)
+    {
+      info_proc_syscalls (pip, summary);
+    }
+  if (summary || all || mappings)
+    {
+      info_proc_mappings (pip, summary);
+    }
+  if (summary || all || signals)
+    {
+      info_proc_signals (pip, summary);
+    }
+  if (summary || all || faults)
+    {
+      info_proc_faults (pip, summary);
+    }
+  printf_filtered ("\n");
 
   /* All done, deal with closing any temporary process info structure,
      freeing temporary memory , etc. */
@@ -1483,13 +3242,18 @@ DESCRIPTION
 */
 
 static char *proc_desc =
-"Show current process status information using /proc entry.\n\
-With no arguments, prints short form.  With 'verbose' prints long form.";
+"Show process status information using /proc entry.\n\
+Specify process id or use current inferior by default.\n\
+Specify keywords for detailed information; default is summary.\n\
+Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
+`status', `syscalls', and `times'.\n\
+Unambiguous abbreviations may be used.";
 
 void
 _initialize_proc_fs ()
 {
-  add_info ("proc", proc_info, proc_desc);
+  add_info ("proc", info_proc, proc_desc);
+  init_syscall_table ();
 }
 
 #endif	/* USE_PROC_FS */
diff --git a/gdb/xm-irix4.h b/gdb/xm-irix4.h
index e25a144..e25b6be 100644
--- a/gdb/xm-irix4.h
+++ b/gdb/xm-irix4.h
@@ -42,9 +42,27 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  */
 #define USE_PROC_FS
 #define PROC_NAME_FMT "/debug/%d"
+
+/* If we are using SVR4 /proc instead of ptrace, use CREATE_INFERIOR_HOOK
+   to do internal /proc initialization. */
+#ifdef USE_PROC_FS
 #define CREATE_INFERIOR_HOOK(pid) inferior_proc_init(pid)
+#endif
 
 /* Irix defines psignal() in signal.h, which gets gcc rather angry at us
  * because their definition is markedly different.
  */
 #define PSIGNAL_IN_SIGNAL_H
+
+/* If gdb's signal handling changes (due to a "handle" command), then
+   this macro expands to an action to perform to notify other parts of
+   gdb that might care, that signal handling has changed.  For hosts using
+   the /proc interface, gdb has more control over which signals cause the
+   inferior to stop and which do not.  In some cases, it is desirable to
+   have signals delivered directly to the inferior without involving the
+   debugger at all. */
+#ifdef USE_PROC_FS
+#define NOTICE_SIGNAL_HANDLING_CHANGE proc_signal_handling_change()
+#endif
+
+#define BROKEN_SIGINFO_H	/* <sys/siginfo.h> si_pid & si_uid are bogus */
diff --git a/gdb/xm-sysv4.h b/gdb/xm-sysv4.h
index 35c831d..c51c58d 100644
--- a/gdb/xm-sysv4.h
+++ b/gdb/xm-sysv4.h
@@ -65,3 +65,15 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* Use setpgid(0,0) to run inferior in a separate process group */
 
 #define NEED_POSIX_SETPGID
+
+/* If gdb's signal handling changes (due to a "handle" command), then
+   this macro expands to an action to perform to notify other parts of
+   gdb that might care, that signal handling has changed.  For hosts using
+   the /proc interface, gdb has more control over which signals cause the
+   inferior to stop and which do not.  In some cases, it is desirable to
+   have signals delivered directly to the inferior without involving the
+   debugger at all. */
+
+#ifdef USE_PROC_FS
+#define NOTICE_SIGNAL_HANDLING_CHANGE proc_signal_handling_change()
+#endif