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[patch/rfc] delete IRIX 4 (and IRIX 3) support

Hello,

This patch removes IRIX 4 (and earlier) support from GDB. Turns out that the configuration was forcing CC into K&R mode and hence IRIX 4 couldn't have built since GDB 5.0.

Rather than leaving IRIX 3 dangling, it deletes that too.

I'll look to commit this in a week,
Andrew

2003-09-03  Andrew Cagney  <cagney@redhat.com>

	* NEWS: Mention that IRIX 3 and IRIX 4 support were removed.
	* configure.host: Delete "mips-sgi-irix3*" and "mips-sgi-irix4*".
	* configure.tgt: Delete "mips*-sgi-*" a.k.a. irix3.
	* irix4-nat.c: Delete file.
	* config/mips/irix4.mh: Delete file.
	* config/mips/irix3.mh: Delete file.
	* config/mips/irix3.mt: Delete file.
	* config/mips/tm-irix3.h: Delete file.
	* config/mips/nm-irix3.h: Delete file.
	* config/mips/xm-irix3.h: Delete file.
	* config/mips/nm-irix4.h: Delete file.
	* config/mips/xm-irix4.h: Delete file.
	* config/mips/tm-irix5.h: Inline contents of "tm-irix3.h".

Index: NEWS
===================================================================
RCS file: /cvs/src/src/gdb/NEWS,v
retrieving revision 1.119
diff -u -r1.119 NEWS
--- NEWS	24 Aug 2003 21:21:11 -0000	1.119
+++ NEWS	3 Sep 2003 19:41:35 -0000
@@ -9,6 +9,11 @@
 and its very obscure effet on GDB's prompt, was never documented,
 tested, nor mentioned in the NEWS file.
 
+* REMOVED configurations and files
+
+SGI Irix-4.x				mips-sgi-irix4	or iris4
+SGI Iris (MIPS) running Irix V3:  	mips-sgi-irix   or  iris
+
 *** Changes in GDB 6.0:
 
 * GNU/Linux support for fork, vfork, and exec.
Index: configure.host
===================================================================
RCS file: /cvs/src/src/gdb/configure.host,v
retrieving revision 1.56
diff -u -r1.56 configure.host
--- configure.host	8 Aug 2003 00:47:50 -0000	1.56
+++ configure.host	3 Sep 2003 19:41:35 -0000
@@ -99,8 +99,6 @@
 # OBSOLETE mips-dec-mach3*)	gdb_host=mipsm3 ;;
 mips-dec-*)		gdb_host=decstation ;;
 mips-little-*)		gdb_host=littlemips ;;
-mips-sgi-irix3*)	gdb_host=irix3 ;;
-mips-sgi-irix4*)	gdb_host=irix4 ;;
 mips-sgi-irix5*)	gdb_host=irix5 ;;
 mips-sgi-irix6*)	gdb_host=irix6 ;;
 mips-sony-*)		gdb_host=news-mips ;;
Index: configure.tgt
===================================================================
RCS file: /cvs/src/src/gdb/configure.tgt,v
retrieving revision 1.113
diff -u -r1.113 configure.tgt
--- configure.tgt	3 Sep 2003 15:02:49 -0000	1.113
+++ configure.tgt	3 Sep 2003 19:41:35 -0000
@@ -164,7 +164,6 @@
 mips*-*-lnews*)		gdb_target=embedl ;;
 mips*-sgi-irix5*)	gdb_target=irix5 ;;
 mips*-sgi-irix6*)	gdb_target=irix6 ;;
-mips*-sgi-*)		gdb_target=irix3 ;;
 mips*-sony-*)		gdb_target=mips64 ;;
 mips*-*-linux*)		gdb_target=linux
 			build_gdbserver=yes
Index: config/mips/tm-irix5.h
===================================================================
RCS file: /cvs/src/src/gdb/config/mips/tm-irix5.h,v
retrieving revision 1.11
diff -u -r1.11 tm-irix5.h
--- config/mips/tm-irix5.h	21 Jun 2003 23:14:44 -0000	1.11
+++ config/mips/tm-irix5.h	3 Sep 2003 19:41:35 -0000
@@ -19,7 +19,53 @@
    Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include "mips/tm-irix3.h"
+#include "mips/tm-mips.h"
+
+/* Redefine register numbers for SGI. */
+
+#undef MIPS_REGISTER_NAMES
+#undef FP0_REGNUM
+#undef PC_REGNUM
+#undef HI_REGNUM
+#undef LO_REGNUM
+#undef CAUSE_REGNUM
+#undef BADVADDR_REGNUM
+#undef FCRCS_REGNUM
+#undef FCRIR_REGNUM
+
+/* Initializer for an array of names for registers 32 and above.
+   There should be NUM_REGS-32 strings in this initializer.  */
+
+#define MIPS_REGISTER_NAMES 	\
+    {	"f0",   "f1",   "f2",   "f3",   "f4",   "f5",   "f6",   "f7", \
+	"f8",   "f9",   "f10",  "f11",  "f12",  "f13",  "f14",  "f15", \
+	"f16",  "f17",  "f18",  "f19",  "f20",  "f21",  "f22",  "f23",\
+	"f24",  "f25",  "f26",  "f27",  "f28",  "f29",  "f30",  "f31",\
+	"pc",	"cause", "bad",	"hi",	"lo",	"fsr",  "fir" \
+    }
+
+/* Register numbers of various important registers.
+   Note that some of these values are "real" register numbers,
+   and correspond to the general registers of the machine,
+   and some are "phony" register numbers which are too large
+   to be actual register numbers as far as the user is concerned
+   but do serve to get the desired values when passed to read_register.  */
+
+#define FP0_REGNUM 32		/* Floating point register 0 (single float) */
+#define PC_REGNUM 64		/* Contains program counter */
+#define CAUSE_REGNUM 65		/* describes last exception */
+#define BADVADDR_REGNUM 66	/* bad vaddr for addressing exception */
+#define HI_REGNUM 67		/* Multiple/divide temp */
+#define LO_REGNUM 68		/* ... */
+#define FCRCS_REGNUM 69		/* FP control/status */
+#define FCRIR_REGNUM 70		/* FP implementation/revision */
+
+/* Offsets for register values in _sigtramp frame.
+   sigcontext is immediately above the _sigtramp frame on Irix.  */
+#define SIGFRAME_BASE		0x0
+#define SIGFRAME_PC_OFF		(SIGFRAME_BASE + 2 * 4)
+#define SIGFRAME_REGSAVE_OFF	(SIGFRAME_BASE + 3 * 4)
+#define SIGFRAME_FPREGSAVE_OFF	(SIGFRAME_BASE + 3 * 4 + 32 * 4 + 4)
 
 /* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
    _MIPS_SIM in a tm-*.h file is simply wrong!  Those are
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