Remove ioctl-based procfs support on Solaris

This is the previously mentioned patch to get rid of
unstructured/ioctl-based procfs support in procfs.c.  Given that support
for structured procfs was introduced in Solaris 2.6 back in 1997 and
we're just removing support for Solaris < 10, there's no point in
carrying that baggage (and tons of support for IRIX and OSF/1 as well)
around any longer.

Most of the patch should be straightforward (removing support for
!NEW_PROC_API, non-Solaris OSes and pre-Solaris 10 quirks).

Only a few points need explanations:

* <sys/syscall.h> was already included unconditionally in most places,
  so there's no need to have guards in a few remaining ones.

* configure.host already obsoletes i?86-*-sysv4.2, i?86-*-sysv5, so
  NEW_PROC_API detection for those in configure.ac can go.

* I'm still including <sys/procfs.h> with #define _STRUCTURED_PROC 1.
  Theoretically, it would be better to include <procfs.h> on Solaris
  (which includes that define), but that breaks the build over
  <procfs.h> vs. gdb's "procfs.h", and doesn't exist on Linux.

* I've regenerated syscall_table[] in proc-events.c with a small script
  from Solaris 10, 11.3, 11.4 <sys/syscall.h>, so there should be no
  traces of older Solaris versions and other OSes left.

* prsysent_t and DYNAMIC_SYSCALLS was only used for AIX 5, but AIX
  doesn't use procfs.c any longer, so all related code can go.

The patch was generated with diff -w so one can easier see changes
without being distracted by simple reindentations.

So far, it has only been compiled and smoke-tested on
amd64-pc-solaris2.1[01], sparcv9-sun-solaris2.1[01], and
x86_64-pc-linux-gnu.  Certainly needs more testing (Solaris 11.3
vs. 11.4, 32-bit gdb, testsuite once I've figured out what's wrong on
Solaris 10 etc.), but it's enough to get a first impression how much
cleanup is possible here.

	* configure.ac Don't check for sys/fault.h, sys/syscall.h,
	sys/proc.h.
	(NEW_PROC_API): Remove.
	(prsysent_t, pr_sigset_t, pr_sigaction64_t, pr_siginfo64_t):
	Likewise.
	* common/common.m4 (GDB_AC_COMMON): Don't check for sys/syscall.h.
	* configure: Regenerate.
	* config.in: Regenerate.
	* gdbserver/configure: Regenerate.
	* gdbserver/config.in: Regenerate.

	* i386-sol2-nat.c (_initialize_amd64_sol2_nat): Remove
	NEW_PROC_API test.
	* sparc-sol2-nat.c (_initialize_sparc_sol2_nat): Likewise.

	* linux-btrace.c: Remove HAVE_SYS_SYSCALL_H test.

	* proc-api.c: Remove !NEW_PROC_API support.
	Remove HAVE_SYS_PROC_H and HAVE_SYS_USER_H tests.
	Remove tests for macros always defined on Solaris.
	* proc-events.c: Remove !NEW_PROC_API support.
	Remove Remove HAVE_SYS_SYSCALL_H, HAVE_SYS_PROC_H and
	HAVE_SYS_USER_H tests.
	(init_syscall_table): Remove non-Solaris syscalls.
	Remove tests for syscalls present on all Solaris versions.
	Add missing Solaris 10+ syscalls.
	(signal_table): Remove non-Solaris signals.
	Remove tests for signals present on all Solaris versions.
	(fault_table): Remove non-Solaris faults.
	Remove tests for faults present on all Solaris versions.
	* proc-flags.c: Remove !NEW_PROC_API support.
	(pr_flag_table): Remove non-Solaris and pre-Solaris 7 comments.
	Remove non-Solaris flags.
	* proc-why.c: Remove !NEW_PROC_API support.
	(pr_why_table): Remove meaningless comments.
	Remove tests for reasons present on all Solaris versions.
	Remove OSF/1 cases.
	(proc_prettyfprint_why): Likewise.

	* procfs.c: Remove !NEW_PROC_API and DYNAMIC_SYSCALLS support.
	Remove HAVE_SYS_FAULT_H and HAVE_SYS_SYSCALL_H tests.
	Remove WA_READ test, IRIX watchpoint support.
	(gdb_sigset_t, gdb_sigaction_t, gdb_siginfo_t): Replace by base
	types.  Change users.
	(gdb_praddset, gdb_prdelset, gdb_premptysysset, gdb_praddsysset)
	(gdb_prdelset, gdb_pr_issyssetmember): Replace by base macros.
	Change callers.
	Remove CTL_PROC_NAME_FMT tests.
	(gdb_prstatus_t, gdb_lwpstatus_t): Replace by base types.  Change
	users.
	(sysset_t_size): Remove.  Use sizeof (sysset_t) in callers.
	Remove PROCFS_DONT_PIOCSSIG_CURSIG support.
	(proc_modify_flag): Replace GDBRESET by PCUNSET.
	Remove PR_ASYNC, PR_KLC tests.
	(proc_unset_inherit_on_fork): Remove PR_ASYNC test.
	(proc_parent_pid): Remove PCWATCH etc. tests.
	(proc_set_watchpoint): Remove !PCWATCH && !PIOCSWATCH support.
	Remove PCAGENT test.
	(proc_get_nthreads) [PIOCNTHR && PIOCTLIST]: Remove.
	Remove SYS_lwpcreate || SYS_lwp_create test.
	(proc_get_current_thread): Likewise.
	[PIOCNTHR && PIOCTLIST]: Remove.
	[PIOCLSTATUS]: Remove.
	(procfs_debug_inferior): Remove non-Solaris cases, conditionals.
	[PRFS_STOPEXEC]: Remove.
	(syscall_is_lwp_exit): Remove non-Solaris cases, conditionals.
	(syscall_is_exit): Likewise.
	(syscall_is_exec): Likewise.
	(syscall_is_lwp_create): Likewise.
	Remove SYS_syssgi support.
	(procfs_wait): Remove PR_ASYNC, !PIOCSSPCACT tests.
	[SYS_syssgi]: Remove.
	Remove non-Solaris cases, conditionals.
	(unconditionally_kill_inferior) [PROCFS_NEED_PIOCSSIG_FOR_KILL]:
	Remove.
	(procfs_init_inferior) [SYS_syssgi]: Remove.
	(procfs_set_exec_trap) [PRFS_STOPEXEC]: Remove.
	(procfs_inferior_created) [SYS_syssgi]: Remove.
	(procfs_set_watchpoint): Remove !AIX5 test.
	(procfs_stopped_by_watchpoint): Remove FLTWATCH test, FLTKWATCH
	case.
	(mappingflags) [MA_PHYS]: Remove.
	(info_mappings_callback): Remove PCAGENT test.
	Remove PIOCOPENLWP || PCAGENT test.

1 files changed, 1 insertions, 60 deletions

diff --git a/gdb/proc-why.c b/gdb/proc-why.c
index 9c60635..c867c69 100644
--- a/gdb/proc-why.c
+++ b/gdb/proc-why.c
@@ -1,4 +1,4 @@
-/* Machine-independent support for SVR4 /proc (process file system)
+/* Machine-independent support for Solaris /proc (process file system)
 
    Copyright (C) 1999-2017 Free Software Foundation, Inc.
 
@@ -20,9 +20,7 @@
 
 #include "defs.h"
 
-#ifdef NEW_PROC_API
 #define _STRUCTURED_PROC 1
-#endif
 
 #include <sys/types.h>
 #include <sys/procfs.h>
@@ -47,55 +45,15 @@ struct trans
 
 static struct trans pr_why_table[] =
 {
-#if defined (PR_REQUESTED)
-  /* All platforms.  */
   { PR_REQUESTED, "PR_REQUESTED", 
     "Directed to stop by debugger via P(IO)CSTOP or P(IO)CWSTOP" },
-#endif
-#if defined (PR_SIGNALLED)
-  /* All platforms.  */
   { PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
-#endif
-#if defined (PR_SYSENTRY)
-  /* All platforms.  */
   { PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
-#endif
-#if defined (PR_SYSEXIT)
-  /* All platforms.  */
   { PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call" },
-#endif
-#if defined (PR_JOBCONTROL)
-  /* All platforms.  */
   { PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
-#endif
-#if defined (PR_FAULTED)
-  /* All platforms.  */
   { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
-#endif
-#if defined (PR_SUSPENDED)
-  /* Solaris only.  */
   { PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
-#endif
-#if defined (PR_CHECKPOINT)
-  /* Solaris only.  */
   { PR_CHECKPOINT, "PR_CHECKPOINT", "Process stopped at checkpoint" },
-#endif
-#if defined (PR_FORKSTOP)
-  /* OSF/1 only.  */
-  { PR_FORKSTOP, "PR_FORKSTOP", "Process stopped at end of fork call" },
-#endif
-#if defined (PR_TCRSTOP)
-  /* OSF/1 only.  */
-  { PR_TCRSTOP, "PR_TCRSTOP", "Process stopped on thread creation" },
-#endif
-#if defined (PR_TTSTOP)
-  /* OSF/1 only.  */
-  { PR_TTSTOP, "PR_TTSTOP", "Process stopped on thread termination" },
-#endif
-#if defined (PR_DEAD)
-  /* OSF/1 only.  */
-  { PR_DEAD, "PR_DEAD", "Process stopped in exit system call" },
-#endif
 };
 
 /* Pretty-print the pr_why field of a `struct prstatus' or `struct
@@ -118,42 +76,25 @@ proc_prettyfprint_why (FILE *file, unsigned long why, unsigned long what,
 	  fprintf (file, ": %s ", pr_why_table[i].desc);
 
 	switch (why) {
-#ifdef PR_REQUESTED
 	case PR_REQUESTED:
 	  break;		/* Nothing more to print.  */
-#endif
-#ifdef PR_SIGNALLED
 	case PR_SIGNALLED:
 	  proc_prettyfprint_signal (file, what, verbose);
 	  break;
-#endif
-#ifdef PR_FAULTED
 	case PR_FAULTED:
 	  proc_prettyfprint_fault (file, what, verbose);
 	  break;
-#endif
-#ifdef PR_SYSENTRY
 	case PR_SYSENTRY:
 	  fprintf (file, "Entry to ");
 	  proc_prettyfprint_syscall (file, what, verbose);
 	  break;
-#endif
-#ifdef PR_SYSEXIT
 	case PR_SYSEXIT:
 	  fprintf (file, "Exit from ");
 	  proc_prettyfprint_syscall (file, what, verbose);
 	  break;
-#endif
-#ifdef PR_JOBCONTROL
 	case PR_JOBCONTROL:
 	  proc_prettyfprint_signal (file, what, verbose);
 	  break;
-#endif
-#ifdef PR_DEAD
-	case PR_DEAD:
-	  fprintf (file, "Exit status: %ld\n", what);
-	  break;
-#endif
 	default:
 	  fprintf (file, "Unknown why %ld, what %ld\n", why, what);
 	  break;