Delete IRIX support

This does most of the mechanical removal.  IOW, the easy part.

This doesn't touch procfs.c as that'd be a harder excision,
potentially affecting Solaris.

mips-tdep.c is left alone.  E.g., I didn't delete the GDB_OSABI_IRIX
enum value, nor references to it in mips-tdep.c.  Some comments
mentioning IRIX ABIs may still be relevant and I wouldn't know what to
do with them. in That can always be done on a separate pass,
preferably by someone who can test on MIPS.

I didn't remove a reference to IRIX in testsuite/lib/future.exp, as I
believe that code is imported from DejaGNU.

Built and tested on x86_64 Fedora 20, with --enable-targets=all.

Tested that building for --target=mips-sgi-irix6 on x86_64 Fedora 20
fails with:

 checking for default auto-load directory... $debugdir:$datadir/auto-load
 checking for default auto-load safe-path... $debugdir:$datadir/auto-load
 *** Configuration mips-sgi-irix6 is obsolete.
 *** Support has been REMOVED.
 make[1]: *** [configure-gdb] Error 1
 make[1]: Leaving directory `/home/pedro/gdb/mygit/build-irix'
 make: *** [all] Error 2

gdb/
2014-10-10  Pedro Alves  <palves@redhat.com>

	* Makefile.in (ALL_TARGET_OBS): Remove mips-irix-tdep.o and solib-irix.o.
	(ALLDEPFILES): Remove mips-irix-tdep.c and solib-irix.c.
	(HFILES_NO_SRCDIR): Remove solib-irix.h.
	* NEWS: Mention that support for mips-sgi-irix5* mips-sgi-irix6*
	and been removed.
	* config/mips/irix5.mh, config/mips/irix6.mh: Delete files.
	* configure.ac: Remove references to IRIX.
	* configure.host: Add *-*-irix* to the obsolete hosts section.
	Remove all other references to irix.
	* irix5-nat.c, mips-irix-tdep.c, solib-irix.c, solib-irix.h:
	Delete files.

gdb/testsuite/
2014-10-10  Pedro Alves  <palves@redhat.com>

	* gdb.base/bigcore.exp: Remove references to IRIX.
	* gdb.base/funcargs.exp: Likewise.
	* gdb.base/interrupt.exp: Likewise.
	* gdb.base/mips_pro.exp: Likewise.
	* gdb.base/nodebug.exp: Likewise.
	* gdb.base/setvar.exp: Likewise.
	* lib/gdb.exp (gdb_compile_shlib): Remove mips-sgi-irix* case.

1 files changed, 0 insertions, 272 deletions

diff --git a/gdb/irix5-nat.c b/gdb/irix5-nat.c
deleted file mode 100644
index f72f183..0000000
--- a/gdb/irix5-nat.c
+++ /dev/null
@@ -1,272 +0,0 @@
-/* Native support for the SGI Iris running IRIX version 5, for GDB.
-
-   Copyright (C) 1988-2014 Free Software Foundation, Inc.
-
-   Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
-   and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
-   Implemented for Irix 4.x by Garrett A. Wollman.
-   Modified for Irix 5.x by Ian Lance Taylor.
-
-   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 3 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, see <http://www.gnu.org/licenses/>.  */
-
-#include "defs.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-#include "regcache.h"
-#include "procfs.h"
-#include <sys/time.h>
-#include <sys/procfs.h>
-#include <setjmp.h>		/* For JB_XXX.  */
-
-/* Prototypes for supply_gregset etc.  */
-#include "gregset.h"
-#include "mips-tdep.h"
-
-static void fetch_core_registers (struct regcache *, char *,
-				  unsigned int, int, CORE_ADDR);
-
-
-/*
- * See the comment in m68k-tdep.c regarding the utility of these functions.
- *
- * These definitions are from the MIPS SVR4 ABI, so they may work for
- * any MIPS SVR4 target.
- */
-
-void
-supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
-{
-  int regi;
-  const greg_t *regp = &(*gregsetp)[0];
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  int gregoff = sizeof (greg_t) - mips_isa_regsize (gdbarch);
-  static char zerobuf[32] = {0};
-
-  for (regi = 0; regi <= CTX_RA; regi++)
-    regcache_raw_supply (regcache, regi,
-			 (const char *) (regp + regi) + gregoff);
-
-  regcache_raw_supply (regcache, mips_regnum (gdbarch)->pc,
-		       (const char *) (regp + CTX_EPC) + gregoff);
-  regcache_raw_supply (regcache, mips_regnum (gdbarch)->hi,
-		       (const char *) (regp + CTX_MDHI) + gregoff);
-  regcache_raw_supply (regcache, mips_regnum (gdbarch)->lo,
-		       (const char *) (regp + CTX_MDLO) + gregoff);
-  regcache_raw_supply (regcache, mips_regnum (gdbarch)->cause,
-		       (const char *) (regp + CTX_CAUSE) + gregoff);
-
-  /* Fill inaccessible registers with zero.  */
-  regcache_raw_supply (regcache, mips_regnum (gdbarch)->badvaddr, zerobuf);
-}
-
-void
-fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
-{
-  int regi, size;
-  greg_t *regp = &(*gregsetp)[0];
-  gdb_byte buf[MAX_REGISTER_SIZE];
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-
-  /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
-     executable, we have to sign extend the registers to 64 bits before
-     filling in the gregset structure.  */
-
-  for (regi = 0; regi <= CTX_RA; regi++)
-    if ((regno == -1) || (regno == regi))
-      {
-	size = register_size (gdbarch, regi);
-	regcache_raw_collect (regcache, regi, buf);
-	*(regp + regi) = extract_signed_integer (buf, size, byte_order);
-      }
-
-  if ((regno == -1) || (regno == mips_regnum (gdbarch)->pc))
-    {
-      regi = mips_regnum (gdbarch)->pc;
-      size = register_size (gdbarch, regi);
-      regcache_raw_collect (regcache, regi, buf);
-      *(regp + CTX_EPC) = extract_signed_integer (buf, size, byte_order);
-    }
-
-  if ((regno == -1) || (regno == mips_regnum (gdbarch)->cause))
-    {
-      regi = mips_regnum (gdbarch)->cause;
-      size = register_size (gdbarch, regi);
-      regcache_raw_collect (regcache, regi, buf);
-      *(regp + CTX_CAUSE) = extract_signed_integer (buf, size, byte_order);
-    }
-
-  if ((regno == -1) || (regno == mips_regnum (gdbarch)->hi))
-    {
-      regi = mips_regnum (gdbarch)->hi;
-      size = register_size (gdbarch, regi);
-      regcache_raw_collect (regcache, regi, buf);
-      *(regp + CTX_MDHI) = extract_signed_integer (buf, size, byte_order);
-    }
-
-  if ((regno == -1) || (regno == mips_regnum (gdbarch)->lo))
-    {
-      regi = mips_regnum (gdbarch)->lo;
-      size = register_size (gdbarch, regi);
-      regcache_raw_collect (regcache, regi, buf);
-      *(regp + CTX_MDLO) = extract_signed_integer (buf, size, byte_order);
-    }
-}
-
-/*
- * Now we do the same thing for floating-point registers.
- * We don't bother to condition on gdbarch_fp0_regnum since any
- * reasonable MIPS configuration has an R3010 in it.
- *
- * Again, see the comments in m68k-tdep.c.
- */
-
-void
-supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
-{
-  int regi;
-  static char zerobuf[32] = {0};
-  char fsrbuf[8];
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-
-  /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs.  */
-
-  for (regi = 0; regi < 32; regi++)
-    regcache_raw_supply (regcache, gdbarch_fp0_regnum (gdbarch) + regi,
-			 (const char *) &fpregsetp->__fp_r.__fp_regs[regi]);
-
-  /* We can't supply the FSR register directly to the regcache,
-     because there is a size issue: On one hand, fpregsetp->fp_csr
-     is 32bits long, while the regcache expects a 64bits long value.
-     So we use a buffer of the correct size and copy into it the register
-     value at the proper location.  */
-  memset (fsrbuf, 0, 4);
-  memcpy (fsrbuf + 4, &fpregsetp->__fp_csr, 4);
-
-  regcache_raw_supply (regcache,
-		       mips_regnum (gdbarch)->fp_control_status, fsrbuf);
-
-  /* FIXME: how can we supply FCRIR?  SGI doesn't tell us.  */
-  regcache_raw_supply (regcache,
-		       mips_regnum (gdbarch)->fp_implementation_revision,
-		       zerobuf);
-}
-
-void
-fill_fpregset (const struct regcache *regcache,
-	       fpregset_t *fpregsetp, int regno)
-{
-  int regi;
-  char *from, *to;
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-
-  /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs.  */
-
-  for (regi = gdbarch_fp0_regnum (gdbarch);
-       regi < gdbarch_fp0_regnum (gdbarch) + 32; regi++)
-    {
-      if ((regno == -1) || (regno == regi))
-	{
-	  const int fp0_regnum = gdbarch_fp0_regnum (gdbarch);
-
-	  to = (char *) &(fpregsetp->__fp_r.__fp_regs[regi - fp0_regnum]);
-          regcache_raw_collect (regcache, regi, to);
-	}
-    }
-
-  if (regno == -1
-      || regno == mips_regnum (gdbarch)->fp_control_status)
-    {
-      char fsrbuf[8];
-
-      /* We can't fill the FSR register directly from the regcache,
-         because there is a size issue: On one hand, fpregsetp->fp_csr
-         is 32bits long, while the regcache expects a 64bits long buffer.
-         So we use a buffer of the correct size and copy the register
-         value from that buffer.  */
-      regcache_raw_collect (regcache,
-			    mips_regnum (gdbarch)->fp_control_status, fsrbuf);
-
-      memcpy (&fpregsetp->__fp_csr, fsrbuf + 4, 4);
-    }
-}
-
-
-/* Provide registers to GDB from a core file.
-
-   CORE_REG_SECT points to an array of bytes, which were obtained from
-   a core file which BFD thinks might contain register contents. 
-   CORE_REG_SIZE is its size.
-
-   Normally, WHICH says which register set corelow suspects this is:
-     0 --- the general-purpose register set
-     2 --- the floating-point register set
-   However, for Irix 5, WHICH isn't used.
-
-   REG_ADDR is also unused.  */
-
-static void
-fetch_core_registers (struct regcache *regcache,
-		      char *core_reg_sect, unsigned core_reg_size,
-		      int which, CORE_ADDR reg_addr)
-{
-  char *srcp = core_reg_sect;
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  int regsize = mips_isa_regsize (gdbarch);
-  int regno;
-
-  /* If regsize is 8, this is a N32 or N64 core file.
-     If regsize is 4, this is an O32 core file.  */
-  if (core_reg_size != regsize * gdbarch_num_regs (gdbarch))
-    {
-      warning (_("wrong size gregset struct in core file"));
-      return;
-    }
-
-  for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
-    {
-      regcache_raw_supply (regcache, regno, srcp);
-      srcp += regsize;
-    }
-}
-
-/* Register that we are able to handle irix5 core file formats.
-   This really is bfd_target_unknown_flavour.  */
-
-static struct core_fns irix5_core_fns =
-{
-  bfd_target_unknown_flavour,		/* core_flavour */
-  default_check_format,			/* check_format */
-  default_core_sniffer,			/* core_sniffer */
-  fetch_core_registers,			/* core_read_registers */
-  NULL					/* next */
-};
-
-/* Provide a prototype to silence -Wmissing-prototypes.  */
-extern initialize_file_ftype _initialize_irix5_nat;
-
-void
-_initialize_irix5_nat (void)
-{
-  struct target_ops *t;
-
-  t = procfs_target ();
-  procfs_use_watchpoints (t);
-  add_target (t);
-
-  deprecated_add_core_fns (&irix5_core_fns);
-}