2002-02-14 Daniel Jacobowitz <drow@mvista.com>

        * gdbserver/Makefile.in: Add regformats directory to INCLUDE_CFLAGS,
        and remove unused $(INCLUDE_DIR).
        Add regcache.c to OBS.
        Add generated register protocol files to clean target.
        Update dependencies for new objects, obsolete old target code.

        * gdbserver/linux-low.c: Remove all platform-specific code to
        new files.  Remove various dead code.  Update to use regcache
        functionality.
        * gdbserver/remote-utils.c (fromhex): Add return statement
        to quiet warning.
        (putpkt): Dynamically allocate buf2 because PBUFSIZ is no longer
        constant.
        (input_interrupt): Add integer parameter to match prototype
        of a signal handler.
        (outreg): Use register_data ().
        (prepare_resume_reply): Use gdbserver_expedite_regs.
        * gdbserver/server.c (main): Dynamically allocate own_buf because
        PBUFSIZ is no longer constant.  Use registers_to_string () and
        registers_from_string ().
        * gdbserver/server.h: No longer include "defs.h".  Add prototypes
        for error (), fatal (), and warning ().  Update definition of
        PBUFSIZ to use regcache functionality.  Add include guard.
        * gdbserver/utils.c (fatal): Add missing ``const''.
        (warning): New function.

        * regformats/regdat.sh: Include "regcache.h" in generated files.
        Provide init_registers () function.
        * regformats/regdef.h: Add prototype for set_register_cache ().
        Add include guard.

        * gdbserver/linux-arm-low.c: New file.
        * gdbserver/linux-i386-low.c: New file.
        * gdbserver/linux-ia64-low.c: New file.
        * gdbserver/linux-m68k-low.c: New file.
        * gdbserver/linux-mips-low.c: New file.
        * gdbserver/linux-ppc-low.c: New file.
        * gdbserver/linux-sh-low.c: New file.

        * gdbserver/regcache.c: New file.
        * gdbserver/regcache.h: New file.

        * gdbserver/low-linux.c: Removed obsolete file.

19 files changed, 1060 insertions, 1302 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 97af1bc6dba..50a3dfcf62a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,51 @@
 2002-02-14  Daniel Jacobowitz  <drow@mvista.com>
 
+	* gdbserver/Makefile.in: Add regformats directory to INCLUDE_CFLAGS,
+	and remove unused $(INCLUDE_DIR).
+	Add regcache.c to OBS.
+	Add generated register protocol files to clean target.
+	Update dependencies for new objects, obsolete old target code.
+
+	* gdbserver/linux-low.c: Remove all platform-specific code to
+	new files.  Remove various dead code.  Update to use regcache
+	functionality.
+	* gdbserver/remote-utils.c (fromhex): Add return statement
+	to quiet warning.
+	(putpkt): Dynamically allocate buf2 because PBUFSIZ is no longer
+	constant.
+	(input_interrupt): Add integer parameter to match prototype
+	of a signal handler.
+	(outreg): Use register_data ().
+	(prepare_resume_reply): Use gdbserver_expedite_regs.
+	* gdbserver/server.c (main): Dynamically allocate own_buf because
+	PBUFSIZ is no longer constant.  Use registers_to_string () and
+	registers_from_string ().
+	* gdbserver/server.h: No longer include "defs.h".  Add prototypes
+	for error (), fatal (), and warning ().  Update definition of
+	PBUFSIZ to use regcache functionality.  Add include guard.
+	* gdbserver/utils.c (fatal): Add missing ``const''.
+	(warning): New function.
+
+	* regformats/regdat.sh: Include "regcache.h" in generated files.
+	Provide init_registers () function.
+	* regformats/regdef.h: Add prototype for set_register_cache ().
+	Add include guard.
+
+	* gdbserver/linux-arm-low.c: New file.
+	* gdbserver/linux-i386-low.c: New file.
+	* gdbserver/linux-ia64-low.c: New file.
+	* gdbserver/linux-m68k-low.c: New file.
+	* gdbserver/linux-mips-low.c: New file.
+	* gdbserver/linux-ppc-low.c: New file.
+	* gdbserver/linux-sh-low.c: New file.
+
+	* gdbserver/regcache.c: New file.
+	* gdbserver/regcache.h: New file.
+
+	* gdbserver/low-linux.c: Removed obsolete file.
+
+2002-02-14  Daniel Jacobowitz  <drow@mvista.com>
+
 	* config/arm/linux.mt: Update GDBSERVER_DEPFILES.
 	* config/i386/linux.mt: Likewise.
 	* config/ia64/linux.mt: Likewise.
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index c3e1dae8457..f6505f07881 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -1,6 +1,5 @@
-#Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-#1999, 2000
-#Free Software Foundation, Inc.
+# Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+# 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
 
 # This file is part of GDB.
 
@@ -97,8 +96,8 @@ READLINE_DEP = $$(READLINE_DIR)
 # -I${srcdir} possibly for regex.h also.
 # -I${srcdir}/config for more generic config files.
 # -I$(srcdir)/../regformats for regdef.h
-INCLUDE_CFLAGS = -I. -I.. -I${srcdir} -I${srcdir}/.. -I${srcdir}/../config \
-	-I$(INCLUDE_DIR) -I$(srcdir)/../regformats
+INCLUDE_CFLAGS = -I. -I.. -I${srcdir} -I${srcdir}/.. \
+	-I$(srcdir)/../regformats
 
 # M{H,T}_CFLAGS, if defined, has host- and target-dependent CFLAGS
 # from the config/ directory.
@@ -139,7 +138,7 @@ DEPFILES = $(GDBSERVER_DEPFILES)
 SOURCES = $(SFILES) $(ALLDEPFILES)
 TAGFILES = $(SOURCES) ${HFILES} ${ALLPARAM} ${POSSLIBS} 
 
-OBS = utils.o $(GDBSERVER_DEPFILES) server.o remote-utils.o
+OBS = utils.o $(GDBSERVER_DEPFILES) server.o remote-utils.o regcache.o
 
 # Prevent Sun make from putting in the machine type.  Setting
 # TARGET_ARCH to nothing works for SunOS 3, 4.0, but not for 4.1.
@@ -201,6 +200,8 @@ tags: TAGS
 clean:
 	rm -f *.o ${ADD_FILES} *~
 	rm -f gdbserver gdbreplay core make.log
+	rm -f reg-arm.c reg-i386.c reg-ia64.c reg-m68k.c reg-mips.c
+	rm -f reg-ppc.c reg-sh.c
 
 distclean: clean
 	rm -f nm.h tm.h xm.h config.status
@@ -239,19 +240,31 @@ MAKEOVERRIDES=
 ## with no dependencies and no actions.
 unexport CHILLFLAGS CHILL_LIB CHILL_FOR_TARGET :
 
-server.o : ${srcdir}/server.c ${srcdir}/server.h
-remote-utils.o : ${srcdir}/remote-utils.c ${srcdir}/server.h
-low-linux.o : ${srcdir}/low-linux.c ${srcdir}/server.h
-low-lynx.o : ${srcdir}/low-lynx.c ${srcdir}/server.h
-low-nbsd.o : ${srcdir}/low-nbsd.c ${srcdir}/server.h
-low-sim.o : ${srcdir}/low-sim.c ${srcdir}/server.h
-low-sparc.o : $(srcdir)/low-sparc.c $(srcdir)/server.h
-low-sun3.o : $(srcdir)/low-sun3.c $(srcdir)/server.h
-low-hppabsd.o : $(srcdir)/low-hppabsd.c $(srcdir)/server.h
-utils.o : ${srcdir}/utils.c ${srcdir}/server.h
-
-regdef_h = $(srcdir)/../regformats/regdef.h
 regdat_sh = $(srcdir)/../regformats/regdat.sh
+regdef_h = $(srcdir)/../regformats/regdef.h
+regcache_h = $(srcdir)/regcache.h
+server_h = $(srcdir)/server.h $(regcache_h)
+
+server.o: server.c $(server_h)
+remote-utils.o: remote-utils.c $(server_h)
+utils.o: utils.c $(server_h)
+regcache.o: regcache.c $(server_h) $(regdef_h)
+
+linux-low.o: linux-low.c $(server_h)
+linux-low-arm.o: linux-low-arm.c $(server_h)
+linux-low-i386.o: linux-low-i386.c $(server_h)
+linux-low-ia64.o: linux-low-ia64.c $(server_h)
+linux-low-mips.o: linux-low-mips.c $(server_h)
+linux-low-ppc.o: linux-low-ppc.c $(server_h)
+linux-low-sh.o: linux-low-sh.c $(server_h)
+
+# OBSOLETE TARGETS
+# OBSOLETE # low-lynx.o : ${srcdir}/low-lynx.c ${srcdir}/server.h
+# OBSOLETE # low-nbsd.o : ${srcdir}/low-nbsd.c ${srcdir}/server.h
+# OBSOLETE # low-sim.o : ${srcdir}/low-sim.c ${srcdir}/server.h
+# OBSOLETE # low-sparc.o : $(srcdir)/low-sparc.c $(srcdir)/server.h
+# OBSOLETE # low-sun3.o : $(srcdir)/low-sun3.c $(srcdir)/server.h
+# OBSOLETE # low-hppabsd.o : $(srcdir)/low-hppabsd.c $(srcdir)/server.h
 
 reg-arm.o : reg-arm.c $(regdef_h)
 reg-arm.c : $(srcdir)/../regformats/reg-arm.dat $(regdat_sh)
diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
new file mode 100644
index 00000000000..761653af423
--- /dev/null
+++ b/gdb/gdbserver/linux-arm-low.c
@@ -0,0 +1,46 @@
+/* GNU/Linux/ARM specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+int num_regs = 16;
+
+int regmap[] = {
+  0, 4, 8, 12, 16, 20, 24, 28,
+  32, 36, 40, 44, 48, 52, 56, 60,
+};
+
+int
+cannot_store_register (int regno)
+{
+  return (regno >= num_regs);
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return (regno >= num_regs);
+}
+
diff --git a/gdb/gdbserver/linux-i386-low.c b/gdb/gdbserver/linux-i386-low.c
new file mode 100644
index 00000000000..cb7b55f0f6c
--- /dev/null
+++ b/gdb/gdbserver/linux-i386-low.c
@@ -0,0 +1,59 @@
+/* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+/* This module only supports access to the general purpose registers.
+   Adjust the relevant constants accordingly.
+
+   FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
+   get at the registers.  Better yet, we should try to share code with
+   i386-linux-nat.c.  */
+
+int num_regs = 16;
+
+/* This stuff comes from i386-linux-nat.c.  */
+
+/* Mapping between the general-purpose registers in `struct user'
+   format and GDB's register array layout.  */
+int regmap[] = 
+{
+  EAX * 4, ECX * 4, EDX * 4, EBX * 4,
+  UESP * 4, EBP * 4, ESI * 4, EDI * 4,
+  EIP * 4, EFL * 4, CS * 4, SS * 4,
+  DS * 4, ES * 4, FS * 4, GS * 4
+};
+
+int
+cannot_store_register (int regno)
+{
+  return (regno >= num_regs);
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return (regno >= num_regs);
+}
diff --git a/gdb/gdbserver/linux-ia64-low.c b/gdb/gdbserver/linux-ia64-low.c
new file mode 100644
index 00000000000..d7ab99bf9ef
--- /dev/null
+++ b/gdb/gdbserver/linux-ia64-low.c
@@ -0,0 +1,296 @@
+/* GNU/Linux/IA64 specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+int num_regs = 590;
+
+#include <asm/ptrace_offsets.h>
+
+int regmap[] =
+  {
+    /* general registers */
+    -1,		/* gr0 not available; i.e, it's always zero */
+    PT_R1,
+    PT_R2,
+    PT_R3,
+    PT_R4,
+    PT_R5,
+    PT_R6,
+    PT_R7,
+    PT_R8,
+    PT_R9,
+    PT_R10,
+    PT_R11,
+    PT_R12,
+    PT_R13,
+    PT_R14,
+    PT_R15,
+    PT_R16,
+    PT_R17,
+    PT_R18,
+    PT_R19,
+    PT_R20,
+    PT_R21,
+    PT_R22,
+    PT_R23,
+    PT_R24,
+    PT_R25,
+    PT_R26,
+    PT_R27,
+    PT_R28,
+    PT_R29,
+    PT_R30,
+    PT_R31,
+    /* gr32 through gr127 not directly available via the ptrace interface */
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    /* Floating point registers */
+    -1, -1,	/* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
+    PT_F2,
+    PT_F3,
+    PT_F4,
+    PT_F5,
+    PT_F6,
+    PT_F7,
+    PT_F8,
+    PT_F9,
+    PT_F10,
+    PT_F11,
+    PT_F12,
+    PT_F13,
+    PT_F14,
+    PT_F15,
+    PT_F16,
+    PT_F17,
+    PT_F18,
+    PT_F19,
+    PT_F20,
+    PT_F21,
+    PT_F22,
+    PT_F23,
+    PT_F24,
+    PT_F25,
+    PT_F26,
+    PT_F27,
+    PT_F28,
+    PT_F29,
+    PT_F30,
+    PT_F31,
+    PT_F32,
+    PT_F33,
+    PT_F34,
+    PT_F35,
+    PT_F36,
+    PT_F37,
+    PT_F38,
+    PT_F39,
+    PT_F40,
+    PT_F41,
+    PT_F42,
+    PT_F43,
+    PT_F44,
+    PT_F45,
+    PT_F46,
+    PT_F47,
+    PT_F48,
+    PT_F49,
+    PT_F50,
+    PT_F51,
+    PT_F52,
+    PT_F53,
+    PT_F54,
+    PT_F55,
+    PT_F56,
+    PT_F57,
+    PT_F58,
+    PT_F59,
+    PT_F60,
+    PT_F61,
+    PT_F62,
+    PT_F63,
+    PT_F64,
+    PT_F65,
+    PT_F66,
+    PT_F67,
+    PT_F68,
+    PT_F69,
+    PT_F70,
+    PT_F71,
+    PT_F72,
+    PT_F73,
+    PT_F74,
+    PT_F75,
+    PT_F76,
+    PT_F77,
+    PT_F78,
+    PT_F79,
+    PT_F80,
+    PT_F81,
+    PT_F82,
+    PT_F83,
+    PT_F84,
+    PT_F85,
+    PT_F86,
+    PT_F87,
+    PT_F88,
+    PT_F89,
+    PT_F90,
+    PT_F91,
+    PT_F92,
+    PT_F93,
+    PT_F94,
+    PT_F95,
+    PT_F96,
+    PT_F97,
+    PT_F98,
+    PT_F99,
+    PT_F100,
+    PT_F101,
+    PT_F102,
+    PT_F103,
+    PT_F104,
+    PT_F105,
+    PT_F106,
+    PT_F107,
+    PT_F108,
+    PT_F109,
+    PT_F110,
+    PT_F111,
+    PT_F112,
+    PT_F113,
+    PT_F114,
+    PT_F115,
+    PT_F116,
+    PT_F117,
+    PT_F118,
+    PT_F119,
+    PT_F120,
+    PT_F121,
+    PT_F122,
+    PT_F123,
+    PT_F124,
+    PT_F125,
+    PT_F126,
+    PT_F127,
+    /* predicate registers - we don't fetch these individually */
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    /* branch registers */
+    PT_B0,
+    PT_B1,
+    PT_B2,
+    PT_B3,
+    PT_B4,
+    PT_B5,
+    PT_B6,
+    PT_B7,
+    /* virtual frame pointer and virtual return address pointer */
+    -1, -1,
+    /* other registers */
+    PT_PR,
+    PT_CR_IIP,	/* ip */
+    PT_CR_IPSR, /* psr */
+    PT_CFM,	/* cfm */
+    /* kernel registers not visible via ptrace interface (?) */
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    /* hole */
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    PT_AR_RSC,
+    PT_AR_BSP,
+    PT_AR_BSPSTORE,
+    PT_AR_RNAT,
+    -1,
+    -1,		/* Not available: FCR, IA32 floating control register */
+    -1, -1,
+    -1,		/* Not available: EFLAG */
+    -1,		/* Not available: CSD */
+    -1,		/* Not available: SSD */
+    -1,		/* Not available: CFLG */
+    -1,		/* Not available: FSR */
+    -1,		/* Not available: FIR */
+    -1,		/* Not available: FDR */
+    -1,
+    PT_AR_CCV,
+    -1, -1, -1,
+    PT_AR_UNAT,
+    -1, -1, -1,
+    PT_AR_FPSR,
+    -1, -1, -1,
+    -1,		/* Not available: ITC */
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    PT_AR_PFS,
+    PT_AR_LC,
+    -1,		/* Not available: EC, the Epilog Count register */
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1,
+    /* nat bits - not fetched directly; instead we obtain these bits from
+       either rnat or unat or from memory. */
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1,
+  };
+
+int
+cannot_store_register (int regno)
+{
+  return 0;
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return 0;
+}
+
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 368c3f226c0..4c293165730 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -31,22 +31,15 @@
 #include <sys/ioctl.h>
 #include <fcntl.h>
 #include <string.h>
-
-/***************Begin MY defs*********************/
-static char my_registers[REGISTER_BYTES];
-char *registers = my_registers;
-/***************End MY defs*********************/
-
-#ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
-#endif
+#include <stdlib.h>
+#include <unistd.h>
 
 #define PTRACE_ARG3_TYPE long
 #define PTRACE_XFER_TYPE int
 
 extern int errno;
-
-static void initialize_arch (void);
+extern int num_regs;
+extern int regmap[];
 
 /* Start an inferior process and returns its pid.
    ALLARGS is a vector of program-name and args. */
@@ -156,432 +149,23 @@ myresume (int step, int signal)
     perror_with_name ("ptrace");
 }
 
-
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-/* U_REGS_OFFSET is the offset of the registers within the u area.  */
-#if !defined (U_REGS_OFFSET)
-#define U_REGS_OFFSET \
-  ptrace (PT_READ_U, inferior_pid, \
-          (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
-    - KERNEL_U_ADDR
-#endif
-
-#ifdef I386_GNULINUX_TARGET
-/* This module only supports access to the general purpose registers.
-   Adjust the relevant constants accordingly.
-
-   FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
-   get at the registers.  Better yet, we should try to share code with
-   i386-linux-nat.c.  */
-#undef NUM_FREGS
-#define NUM_FREGS 0
-#undef NUM_REGS
-#define NUM_REGS NUM_GREGS
-
-/* This stuff comes from i386-tdep.c.  */
-
-/* i386_register_byte[i] is the offset into the register file of the
-   start of register number i.  We initialize this from
-   i386_register_raw_size.  */
-int i386_register_byte[MAX_NUM_REGS];
-
-/* i386_register_raw_size[i] is the number of bytes of storage in
-   GDB's register array occupied by register i.  */
-int i386_register_raw_size[MAX_NUM_REGS] = {
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-  10, 10, 10, 10,
-  10, 10, 10, 10,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-  16, 16, 16, 16,
-  16, 16, 16, 16,
-   4
-};
-
-static void
-initialize_arch (void)
-{
-  /* Initialize the table saying where each register starts in the
-     register file.  */
-  {
-    int i, offset;
-
-    offset = 0;
-    for (i = 0; i < MAX_NUM_REGS; i++)
-      {
-	i386_register_byte[i] = offset;
-	offset += i386_register_raw_size[i];
-      }
-  }
-}
-
-/* This stuff comes from i386-linux-nat.c.  */
-
-/* Mapping between the general-purpose registers in `struct user'
-   format and GDB's register array layout.  */
-static int regmap[] = 
-{
-  EAX, ECX, EDX, EBX,
-  UESP, EBP, ESI, EDI,
-  EIP, EFL, CS, SS,
-  DS, ES, FS, GS
-};
-
-/* Return the address of register REGNUM.  BLOCKEND is the value of
-   u.u_ar0, which should point to the registers.  */
-
-CORE_ADDR
-register_u_addr (CORE_ADDR blockend, int regnum)
-{
-  return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(TARGET_M68K)
-static void
-initialize_arch (void)
-{
-  return;
-}
-
-/* This table must line up with REGISTER_NAMES in tm-m68k.h */
-static int regmap[] =
-{
-#ifdef PT_D0
-  PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
-  PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
-  PT_SR, PT_PC,
-#else
-  14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
-  17, 18,
-#endif
-#ifdef PT_FP0
-  PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7,
-  PT_FPCR, PT_FPSR, PT_FPIAR
-#else
-  21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47
-#endif
-};
-
-/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
-   is stored.  */
+#define REGISTER_RAW_SIZE(regno) register_size((regno))
 
 int
-m68k_linux_register_u_addr (int blockend, int regnum)
-{
-  return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(IA64_GNULINUX_TARGET)
-#undef NUM_FREGS
-#define NUM_FREGS 0
-
-#include <asm/ptrace_offsets.h>
-
-static int u_offsets[] =
-  {
-    /* general registers */
-    -1,		/* gr0 not available; i.e, it's always zero */
-    PT_R1,
-    PT_R2,
-    PT_R3,
-    PT_R4,
-    PT_R5,
-    PT_R6,
-    PT_R7,
-    PT_R8,
-    PT_R9,
-    PT_R10,
-    PT_R11,
-    PT_R12,
-    PT_R13,
-    PT_R14,
-    PT_R15,
-    PT_R16,
-    PT_R17,
-    PT_R18,
-    PT_R19,
-    PT_R20,
-    PT_R21,
-    PT_R22,
-    PT_R23,
-    PT_R24,
-    PT_R25,
-    PT_R26,
-    PT_R27,
-    PT_R28,
-    PT_R29,
-    PT_R30,
-    PT_R31,
-    /* gr32 through gr127 not directly available via the ptrace interface */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    /* Floating point registers */
-    -1, -1,	/* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
-    PT_F2,
-    PT_F3,
-    PT_F4,
-    PT_F5,
-    PT_F6,
-    PT_F7,
-    PT_F8,
-    PT_F9,
-    PT_F10,
-    PT_F11,
-    PT_F12,
-    PT_F13,
-    PT_F14,
-    PT_F15,
-    PT_F16,
-    PT_F17,
-    PT_F18,
-    PT_F19,
-    PT_F20,
-    PT_F21,
-    PT_F22,
-    PT_F23,
-    PT_F24,
-    PT_F25,
-    PT_F26,
-    PT_F27,
-    PT_F28,
-    PT_F29,
-    PT_F30,
-    PT_F31,
-    PT_F32,
-    PT_F33,
-    PT_F34,
-    PT_F35,
-    PT_F36,
-    PT_F37,
-    PT_F38,
-    PT_F39,
-    PT_F40,
-    PT_F41,
-    PT_F42,
-    PT_F43,
-    PT_F44,
-    PT_F45,
-    PT_F46,
-    PT_F47,
-    PT_F48,
-    PT_F49,
-    PT_F50,
-    PT_F51,
-    PT_F52,
-    PT_F53,
-    PT_F54,
-    PT_F55,
-    PT_F56,
-    PT_F57,
-    PT_F58,
-    PT_F59,
-    PT_F60,
-    PT_F61,
-    PT_F62,
-    PT_F63,
-    PT_F64,
-    PT_F65,
-    PT_F66,
-    PT_F67,
-    PT_F68,
-    PT_F69,
-    PT_F70,
-    PT_F71,
-    PT_F72,
-    PT_F73,
-    PT_F74,
-    PT_F75,
-    PT_F76,
-    PT_F77,
-    PT_F78,
-    PT_F79,
-    PT_F80,
-    PT_F81,
-    PT_F82,
-    PT_F83,
-    PT_F84,
-    PT_F85,
-    PT_F86,
-    PT_F87,
-    PT_F88,
-    PT_F89,
-    PT_F90,
-    PT_F91,
-    PT_F92,
-    PT_F93,
-    PT_F94,
-    PT_F95,
-    PT_F96,
-    PT_F97,
-    PT_F98,
-    PT_F99,
-    PT_F100,
-    PT_F101,
-    PT_F102,
-    PT_F103,
-    PT_F104,
-    PT_F105,
-    PT_F106,
-    PT_F107,
-    PT_F108,
-    PT_F109,
-    PT_F110,
-    PT_F111,
-    PT_F112,
-    PT_F113,
-    PT_F114,
-    PT_F115,
-    PT_F116,
-    PT_F117,
-    PT_F118,
-    PT_F119,
-    PT_F120,
-    PT_F121,
-    PT_F122,
-    PT_F123,
-    PT_F124,
-    PT_F125,
-    PT_F126,
-    PT_F127,
-    /* predicate registers - we don't fetch these individually */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    /* branch registers */
-    PT_B0,
-    PT_B1,
-    PT_B2,
-    PT_B3,
-    PT_B4,
-    PT_B5,
-    PT_B6,
-    PT_B7,
-    /* virtual frame pointer and virtual return address pointer */
-    -1, -1,
-    /* other registers */
-    PT_PR,
-    PT_CR_IIP,	/* ip */
-    PT_CR_IPSR, /* psr */
-    PT_CFM,	/* cfm */
-    /* kernel registers not visible via ptrace interface (?) */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    /* hole */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    PT_AR_RSC,
-    PT_AR_BSP,
-    PT_AR_BSPSTORE,
-    PT_AR_RNAT,
-    -1,
-    -1,		/* Not available: FCR, IA32 floating control register */
-    -1, -1,
-    -1,		/* Not available: EFLAG */
-    -1,		/* Not available: CSD */
-    -1,		/* Not available: SSD */
-    -1,		/* Not available: CFLG */
-    -1,		/* Not available: FSR */
-    -1,		/* Not available: FIR */
-    -1,		/* Not available: FDR */
-    -1,
-    PT_AR_CCV,
-    -1, -1, -1,
-    PT_AR_UNAT,
-    -1, -1, -1,
-    PT_AR_FPSR,
-    -1, -1, -1,
-    -1,		/* Not available: ITC */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    PT_AR_PFS,
-    PT_AR_LC,
-    -1,		/* Not available: EC, the Epilog Count register */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1,
-    /* nat bits - not fetched directly; instead we obtain these bits from
-       either rnat or unat or from memory. */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-  };
-
-int
-ia64_register_u_addr (int blockend, int regnum)
+register_addr (int regnum)
 {
   int addr;
 
-  if (regnum < 0 || regnum >= NUM_REGS)
+  if (regnum < 0 || regnum >= num_regs)
     error ("Invalid register number %d.", regnum);
 
-  addr = u_offsets[regnum];
+  addr = regmap[regnum];
   if (addr == -1)
     addr = 0;
 
   return addr;
 }
 
-static void
-initialize_arch (void)
-{
-  return;
-}
-
-#elif defined(ARM_GNULINUX_TARGET)
-int arm_register_u_addr(blockend, regnum)
-     int blockend;
-     int regnum;
-{
-  return blockend + REGISTER_BYTE(regnum);  
-}
-
-static void
-initialize_arch ()
-{
-}
-#endif
-
-CORE_ADDR
-register_addr (int regno, CORE_ADDR blockend)
-{
-  CORE_ADDR addr;
-
-  if (regno < 0 || regno >= NUM_REGS)
-    error ("Invalid register number %d.", regno);
-
-  REGISTER_U_ADDR (addr, blockend, regno);
-
-  return addr;
-}
-
 /* Fetch one register.  */
 
 static void
@@ -590,16 +174,18 @@ fetch_register (int regno)
   CORE_ADDR regaddr;
   register int i;
 
-  /* Offset of registers within the u area.  */
-  unsigned int offset;
-
-  offset = U_REGS_OFFSET;
+  if (regno >= num_regs)
+    return;
+  if (cannot_fetch_register (regno))
+    return;
 
-  regaddr = register_addr (regno, offset);
+  regaddr = register_addr (regno);
+  if (regaddr == -1)
+    return;
   for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
     {
       errno = 0;
-      *(PTRACE_XFER_TYPE *) &registers[REGISTER_BYTE (regno) + i] =
+      *(PTRACE_XFER_TYPE *) (register_data (regno) + i) =
 	ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0);
       regaddr += sizeof (PTRACE_XFER_TYPE);
       if (errno != 0)
@@ -622,7 +208,7 @@ void
 fetch_inferior_registers (int regno)
 {
   if (regno == -1 || regno == 0)
-    for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
+    for (regno = 0; regno < num_regs; regno++)
       fetch_register (regno);
   else
     fetch_register (regno);
@@ -637,62 +223,43 @@ store_inferior_registers (int regno)
 {
   CORE_ADDR regaddr;
   int i;
-  unsigned int offset = U_REGS_OFFSET;
 
   if (regno >= 0)
     {
-#if 0
-      if (CANNOT_STORE_REGISTER (regno))
+      if (regno >= num_regs)
+	return;
+
+      if (cannot_store_register (regno))
+	return;
+
+      regaddr = register_addr (regno);
+      if (regaddr == -1)
 	return;
-#endif
-      regaddr = register_addr (regno, offset);
       errno = 0;
-#if 0
-      if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
+      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
 	{
-	  scratch = *(int *) &registers[REGISTER_BYTE (regno)] | 0x3;
-	  ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		  scratch, 0);
+	  errno = 0;
+	  ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+		  *(int *) (register_data (regno) + i));
 	  if (errno != 0)
 	    {
-	      /* Error, even if attached.  Failing to write these two
-	         registers is pretty serious.  */
-	      sprintf (buf, "writing register number %d", regno);
-	      perror_with_name (buf);
+	      /* Warning, not error, in case we are attached; sometimes the
+		 kernel doesn't let us at the registers.  */
+	      char *err = strerror (errno);
+	      char *msg = alloca (strlen (err) + 128);
+	      sprintf (msg, "writing register %d: %s",
+		       regno, err);
+	      error (msg);
+	      return;
 	    }
+	  regaddr += sizeof (int);
 	}
-      else
-#endif
-	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
-	  {
-	    errno = 0;
-	    ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		    *(int *) &registers[REGISTER_BYTE (regno) + i]);
-	    if (errno != 0)
-	      {
-		/* Warning, not error, in case we are attached; sometimes the
-		   kernel doesn't let us at the registers.  */
-		char *err = strerror (errno);
-		char *msg = alloca (strlen (err) + 128);
-		sprintf (msg, "writing register %d: %s",
-			 regno, err);
-		error (msg);
-		return;
-	      }
-	    regaddr += sizeof (int);
-	  }
     }
   else
-    for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
+    for (regno = 0; regno < num_regs; regno++)
       store_inferior_registers (regno);
 }
 
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
-   in the NEW_SUN_PTRACE case.
-   It ought to be straightforward.  But it appears that writing did
-   not write the data that I specified.  I cannot understand where
-   it got the data that it actually did write.  */
-
 /* Copy LEN bytes from inferior's memory starting at MEMADDR
    to debugger memory starting at MYADDR.  */
 
@@ -772,5 +339,5 @@ write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
 void
 initialize_low (void)
 {
-  initialize_arch ();
+  init_registers ();
 }
diff --git a/gdb/gdbserver/linux-m68k-low.c b/gdb/gdbserver/linux-m68k-low.c
new file mode 100644
index 00000000000..334084ad61c
--- /dev/null
+++ b/gdb/gdbserver/linux-m68k-low.c
@@ -0,0 +1,64 @@
+/* GNU/Linux/m68k specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+int num_regs = 31;
+
+/* This table must line up with REGISTER_NAMES in tm-m68k.h */
+int regmap[] =
+{
+#ifdef PT_D0
+  PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4,
+  PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4,
+  PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4,
+  PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4,
+  PT_SR * 4, PT_PC * 4,
+#else
+  14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4,
+  7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4,
+  17 * 4, 18 * 4,
+#endif
+#ifdef PT_FP0
+  PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4,
+  PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4,
+  PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4
+#else
+  21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4,
+  39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4
+#endif
+};
+
+int
+cannot_store_register (int regno)
+{
+  return (regno >= num_regs);
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return (regno >= num_regs);
+}
diff --git a/gdb/gdbserver/linux-mips-low.c b/gdb/gdbserver/linux-mips-low.c
new file mode 100644
index 00000000000..ef14c6a9d6e
--- /dev/null
+++ b/gdb/gdbserver/linux-mips-low.c
@@ -0,0 +1,104 @@
+/* GNU/Linux/MIPS specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+int num_regs = 90;
+
+#include <asm/ptrace.h>
+
+/* Return the ptrace ``address'' of register REGNO. */
+
+/* Matches mips_generic32_regs */
+int regmap[] = {
+  0,  1,  2,  3,  4,  5,  6,  7,
+  8,  9,  10, 11, 12, 13, 14, 15,
+  16, 17, 18, 19, 20, 21, 22, 23,
+  24, 25, 26, 27, 28, 29, 30, 31,
+
+  -1, MMLO, MMHI, BADVADDR, CAUSE, PC,
+
+  FPR_BASE,      FPR_BASE + 1,  FPR_BASE + 2,  FPR_BASE + 3,
+  FPR_BASE + 4,  FPR_BASE + 5,  FPR_BASE + 6,  FPR_BASE + 7,
+  FPR_BASE + 8,  FPR_BASE + 8,  FPR_BASE + 10, FPR_BASE + 11,
+  FPR_BASE + 12, FPR_BASE + 13, FPR_BASE + 14, FPR_BASE + 15,
+  FPR_BASE + 16, FPR_BASE + 17, FPR_BASE + 18, FPR_BASE + 19,
+  FPR_BASE + 20, FPR_BASE + 21, FPR_BASE + 22, FPR_BASE + 23,
+  FPR_BASE + 24, FPR_BASE + 25, FPR_BASE + 26, FPR_BASE + 27,
+  FPR_BASE + 28, FPR_BASE + 29, FPR_BASE + 30, FPR_BASE + 31,
+  FPC_CSR, FPC_EIR,
+
+  -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+};
+
+/* From mips-linux-nat.c.  */
+
+/* Pseudo registers can not be read.  ptrace does not provide a way to
+   read (or set) PS_REGNUM, and there's no point in reading or setting
+   ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or FCRIR via
+   ptrace().  */
+
+int
+cannot_fetch_register (int regno)
+{
+  struct reg *reg;
+
+  if (regmap[regno] == -1)
+    return 1;
+
+  reg = find_register_by_number (regno);
+
+  if (strcmp (reg->name, "zero") == 0)
+    return 1;
+
+  return 0;
+}
+
+int
+cannot_store_register (int regno)
+{
+  struct reg *reg;
+
+  if (regmap[regno] == -1)
+    return 1;
+
+  reg = find_register_by_number (regno);
+
+  if (strcmp (reg->name, "zero") == 0)
+    return 1;
+
+  if (strcmp (reg->name, "cause") == 0)
+    return 1;
+
+  if (strcmp (reg->name, "bad") == 0)
+    return 1;
+
+  if (strcmp (reg->name, "fir") == 0)
+    return 1;
+
+  return 0;
+}
diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c
new file mode 100644
index 00000000000..38f7b70a80a
--- /dev/null
+++ b/gdb/gdbserver/linux-ppc-low.c
@@ -0,0 +1,61 @@
+/* GNU/Linux/PowerPC specific low level interface, for the remote server for
+   GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#include <asm/ptrace.h>
+
+int num_regs = 71;
+
+/* Currently, don't check/send MQ.  */
+int regmap[] =
+ {PT_R0 * 4,     PT_R1 * 4,     PT_R2 * 4,     PT_R3 * 4,
+  PT_R4 * 4,     PT_R5 * 4,     PT_R6 * 4,     PT_R7 * 4,
+  PT_R8 * 4,     PT_R9 * 4,     PT_R10 * 4,    PT_R11 * 4,
+  PT_R12 * 4,    PT_R13 * 4,    PT_R14 * 4,    PT_R15 * 4,
+  PT_R16 * 4,    PT_R17 * 4,    PT_R18 * 4,    PT_R19 * 4,
+  PT_R20 * 4,    PT_R21 * 4,    PT_R22 * 4,    PT_R23 * 4,
+  PT_R24 * 4,    PT_R25 * 4,    PT_R26 * 4,    PT_R27 * 4,
+  PT_R28 * 4,    PT_R29 * 4,    PT_R30 * 4,    PT_R31 * 4,
+  PT_FPR0*4,     PT_FPR0*4 + 8, PT_FPR0*4+16,  PT_FPR0*4+24,
+  PT_FPR0*4+32,  PT_FPR0*4+40,  PT_FPR0*4+48,  PT_FPR0*4+56,
+  PT_FPR0*4+64,  PT_FPR0*4+72,  PT_FPR0*4+80,  PT_FPR0*4+88,
+  PT_FPR0*4+96,  PT_FPR0*4+104,  PT_FPR0*4+112,  PT_FPR0*4+120,
+  PT_FPR0*4+128, PT_FPR0*4+136,  PT_FPR0*4+144,  PT_FPR0*4+152,
+  PT_FPR0*4+160,  PT_FPR0*4+168,  PT_FPR0*4+176,  PT_FPR0*4+184,
+  PT_FPR0*4+192,  PT_FPR0*4+200,  PT_FPR0*4+208,  PT_FPR0*4+216,
+  PT_FPR0*4+224,  PT_FPR0*4+232,  PT_FPR0*4+240,  PT_FPR0*4+248,
+  PT_NIP * 4,    PT_MSR * 4,    PT_CCR * 4,    PT_LNK * 4,
+  PT_CTR * 4,    PT_XER * 4,    -1, };
+
+int
+cannot_store_register (int regno)
+{
+  return 0;
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return 0;
+}
+
diff --git a/gdb/gdbserver/linux-sh-low.c b/gdb/gdbserver/linux-sh-low.c
new file mode 100644
index 00000000000..9fdb75700a9
--- /dev/null
+++ b/gdb/gdbserver/linux-sh-low.c
@@ -0,0 +1,58 @@
+/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#include <asm/ptrace.h>
+
+int num_regs = 41;
+
+/* Currently, don't check/send MQ.  */
+int regmap[] = {
+ 0,	4,	8,	12,	16,	20,	24,	28,
+ 32,	36,	40,	44,	48,	52,	56,	60,
+
+ REG_PC*4,   REG_PR*4,   REG_GBR*4,  -1,
+ REG_MACH*4, REG_MACL*4, REG_SR*4,
+ REG_FPUL*4, REG_FPSCR*4,
+
+ REG_FPREG0+0,   REG_FPREG0+4,   REG_FPREG0+8,   REG_FPREG0+12,
+ REG_FPREG0+16,  REG_FPREG0+20,  REG_FPREG0+24,  REG_FPREG0+28,
+ REG_FPREG0+32,  REG_FPREG0+36,  REG_FPREG0+40,  REG_FPREG0+44,
+ REG_FPREG0+48,  REG_FPREG0+52,  REG_FPREG0+56,  REG_FPREG0+60,
+};
+
+int
+cannot_store_register (int regno)
+{
+  return 0;
+}
+
+int
+cannot_fetch_register (int regno)
+{
+  return 0;
+}
+
diff --git a/gdb/gdbserver/low-linux.c b/gdb/gdbserver/low-linux.c
deleted file mode 100644
index 726e276540d..00000000000
--- a/gdb/gdbserver/low-linux.c
+++ /dev/null
@@ -1,777 +0,0 @@
-/* Low level interface to ptrace, for the remote server for GDB.
-   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
-   Free Software Foundation, Inc.
-
-   This file is part of GDB.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include "server.h"
-#include <sys/wait.h>
-#include "frame.h"
-#include "inferior.h"
-
-#include <stdio.h>
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <sys/ptrace.h>
-#include <sys/user.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-/***************Begin MY defs*********************/
-static char my_registers[REGISTER_BYTES];
-char *registers = my_registers;
-/***************End MY defs*********************/
-
-#ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
-#endif
-
-/* Default the type of the ptrace transfer to int.  */
-#ifndef PTRACE_XFER_TYPE
-#define PTRACE_XFER_TYPE int
-#endif
-
-extern int errno;
-
-static void initialize_arch (void);
-
-/* Start an inferior process and returns its pid.
-   ALLARGS is a vector of program-name and args. */
-
-int
-create_inferior (char *program, char **allargs)
-{
-  int pid;
-
-  pid = fork ();
-  if (pid < 0)
-    perror_with_name ("fork");
-
-  if (pid == 0)
-    {
-      ptrace (PTRACE_TRACEME, 0, 0, 0);
-
-      execv (program, allargs);
-
-      fprintf (stderr, "Cannot exec %s: %s.\n", program,
-	       errno < sys_nerr ? sys_errlist[errno] : "unknown error");
-      fflush (stderr);
-      _exit (0177);
-    }
-
-  return pid;
-}
-
-/* Attach to an inferior process.  */
-
-int
-myattach (int pid)
-{
-  if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
-    {
-      fprintf (stderr, "Cannot attach to process %d: %s (%d)\n", pid,
-	       errno < sys_nerr ? sys_errlist[errno] : "unknown error",
-	       errno);
-      fflush (stderr);
-      _exit (0177);
-    }
-
-  return 0;
-}
-
-/* Kill the inferior process.  Make us have no inferior.  */
-
-void
-kill_inferior (void)
-{
-  if (inferior_pid == 0)
-    return;
-  ptrace (PTRACE_KILL, inferior_pid, 0, 0);
-  wait (0);
-/*************inferior_died ();****VK**************/
-}
-
-/* Return nonzero if the given thread is still alive.  */
-int
-mythread_alive (int pid)
-{
-  return 1;
-}
-
-/* Wait for process, returns status */
-
-unsigned char
-mywait (char *status)
-{
-  int pid;
-  union wait w;
-
-  enable_async_io ();
-  pid = waitpid (inferior_pid, &w, 0);
-  disable_async_io ();
-  if (pid != inferior_pid)
-    perror_with_name ("wait");
-
-  if (WIFEXITED (w))
-    {
-      fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
-      *status = 'W';
-      return ((unsigned char) WEXITSTATUS (w));
-    }
-  else if (!WIFSTOPPED (w))
-    {
-      fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
-      *status = 'X';
-      return ((unsigned char) WTERMSIG (w));
-    }
-
-  fetch_inferior_registers (0);
-
-  *status = 'T';
-  return ((unsigned char) WSTOPSIG (w));
-}
-
-/* Resume execution of the inferior process.
-   If STEP is nonzero, single-step it.
-   If SIGNAL is nonzero, give it that signal.  */
-
-void
-myresume (int step, int signal)
-{
-  errno = 0;
-  ptrace (step ? PTRACE_SINGLESTEP : PTRACE_CONT, inferior_pid, 1, signal);
-  if (errno)
-    perror_with_name ("ptrace");
-}
-
-
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-/* U_REGS_OFFSET is the offset of the registers within the u area.  */
-#if !defined (U_REGS_OFFSET)
-#define U_REGS_OFFSET \
-  ptrace (PT_READ_U, inferior_pid, \
-          (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
-    - KERNEL_U_ADDR
-#endif
-
-#ifdef I386_GNULINUX_TARGET
-/* This module only supports access to the general purpose registers.
-   Adjust the relevant constants accordingly.
-
-   FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
-   get at the registers.  Better yet, we should try to share code with
-   i386-linux-nat.c.  */
-#undef NUM_FREGS
-#define NUM_FREGS 0
-#undef NUM_REGS
-#define NUM_REGS NUM_GREGS
-
-/* This stuff comes from i386-tdep.c.  */
-
-/* i386_register_byte[i] is the offset into the register file of the
-   start of register number i.  We initialize this from
-   i386_register_raw_size.  */
-int i386_register_byte[MAX_NUM_REGS];
-
-/* i386_register_raw_size[i] is the number of bytes of storage in
-   GDB's register array occupied by register i.  */
-int i386_register_raw_size[MAX_NUM_REGS] = {
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-  10, 10, 10, 10,
-  10, 10, 10, 10,
-   4,  4,  4,  4,
-   4,  4,  4,  4,
-  16, 16, 16, 16,
-  16, 16, 16, 16,
-   4
-};
-
-static void
-initialize_arch (void)
-{
-  /* Initialize the table saying where each register starts in the
-     register file.  */
-  {
-    int i, offset;
-
-    offset = 0;
-    for (i = 0; i < MAX_NUM_REGS; i++)
-      {
-	i386_register_byte[i] = offset;
-	offset += i386_register_raw_size[i];
-      }
-  }
-}
-
-/* This stuff comes from i386-linux-nat.c.  */
-
-/* Mapping between the general-purpose registers in `struct user'
-   format and GDB's register array layout.  */
-static int regmap[] = 
-{
-  EAX, ECX, EDX, EBX,
-  UESP, EBP, ESI, EDI,
-  EIP, EFL, CS, SS,
-  DS, ES, FS, GS
-};
-
-/* Return the address of register REGNUM.  BLOCKEND is the value of
-   u.u_ar0, which should point to the registers.  */
-
-CORE_ADDR
-register_u_addr (CORE_ADDR blockend, int regnum)
-{
-  return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(TARGET_M68K)
-static void
-initialize_arch (void)
-{
-  return;
-}
-
-/* This table must line up with REGISTER_NAMES in tm-m68k.h */
-static int regmap[] =
-{
-#ifdef PT_D0
-  PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
-  PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
-  PT_SR, PT_PC,
-#else
-  14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
-  17, 18,
-#endif
-#ifdef PT_FP0
-  PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7,
-  PT_FPCR, PT_FPSR, PT_FPIAR
-#else
-  21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47
-#endif
-};
-
-/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
-   is stored.  */
-
-int
-m68k_linux_register_u_addr (int blockend, int regnum)
-{
-  return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(IA64_GNULINUX_TARGET)
-#undef NUM_FREGS
-#define NUM_FREGS 0
-
-#include <asm/ptrace_offsets.h>
-
-static int u_offsets[] =
-  {
-    /* general registers */
-    -1,		/* gr0 not available; i.e, it's always zero */
-    PT_R1,
-    PT_R2,
-    PT_R3,
-    PT_R4,
-    PT_R5,
-    PT_R6,
-    PT_R7,
-    PT_R8,
-    PT_R9,
-    PT_R10,
-    PT_R11,
-    PT_R12,
-    PT_R13,
-    PT_R14,
-    PT_R15,
-    PT_R16,
-    PT_R17,
-    PT_R18,
-    PT_R19,
-    PT_R20,
-    PT_R21,
-    PT_R22,
-    PT_R23,
-    PT_R24,
-    PT_R25,
-    PT_R26,
-    PT_R27,
-    PT_R28,
-    PT_R29,
-    PT_R30,
-    PT_R31,
-    /* gr32 through gr127 not directly available via the ptrace interface */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    /* Floating point registers */
-    -1, -1,	/* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
-    PT_F2,
-    PT_F3,
-    PT_F4,
-    PT_F5,
-    PT_F6,
-    PT_F7,
-    PT_F8,
-    PT_F9,
-    PT_F10,
-    PT_F11,
-    PT_F12,
-    PT_F13,
-    PT_F14,
-    PT_F15,
-    PT_F16,
-    PT_F17,
-    PT_F18,
-    PT_F19,
-    PT_F20,
-    PT_F21,
-    PT_F22,
-    PT_F23,
-    PT_F24,
-    PT_F25,
-    PT_F26,
-    PT_F27,
-    PT_F28,
-    PT_F29,
-    PT_F30,
-    PT_F31,
-    PT_F32,
-    PT_F33,
-    PT_F34,
-    PT_F35,
-    PT_F36,
-    PT_F37,
-    PT_F38,
-    PT_F39,
-    PT_F40,
-    PT_F41,
-    PT_F42,
-    PT_F43,
-    PT_F44,
-    PT_F45,
-    PT_F46,
-    PT_F47,
-    PT_F48,
-    PT_F49,
-    PT_F50,
-    PT_F51,
-    PT_F52,
-    PT_F53,
-    PT_F54,
-    PT_F55,
-    PT_F56,
-    PT_F57,
-    PT_F58,
-    PT_F59,
-    PT_F60,
-    PT_F61,
-    PT_F62,
-    PT_F63,
-    PT_F64,
-    PT_F65,
-    PT_F66,
-    PT_F67,
-    PT_F68,
-    PT_F69,
-    PT_F70,
-    PT_F71,
-    PT_F72,
-    PT_F73,
-    PT_F74,
-    PT_F75,
-    PT_F76,
-    PT_F77,
-    PT_F78,
-    PT_F79,
-    PT_F80,
-    PT_F81,
-    PT_F82,
-    PT_F83,
-    PT_F84,
-    PT_F85,
-    PT_F86,
-    PT_F87,
-    PT_F88,
-    PT_F89,
-    PT_F90,
-    PT_F91,
-    PT_F92,
-    PT_F93,
-    PT_F94,
-    PT_F95,
-    PT_F96,
-    PT_F97,
-    PT_F98,
-    PT_F99,
-    PT_F100,
-    PT_F101,
-    PT_F102,
-    PT_F103,
-    PT_F104,
-    PT_F105,
-    PT_F106,
-    PT_F107,
-    PT_F108,
-    PT_F109,
-    PT_F110,
-    PT_F111,
-    PT_F112,
-    PT_F113,
-    PT_F114,
-    PT_F115,
-    PT_F116,
-    PT_F117,
-    PT_F118,
-    PT_F119,
-    PT_F120,
-    PT_F121,
-    PT_F122,
-    PT_F123,
-    PT_F124,
-    PT_F125,
-    PT_F126,
-    PT_F127,
-    /* predicate registers - we don't fetch these individually */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    /* branch registers */
-    PT_B0,
-    PT_B1,
-    PT_B2,
-    PT_B3,
-    PT_B4,
-    PT_B5,
-    PT_B6,
-    PT_B7,
-    /* virtual frame pointer and virtual return address pointer */
-    -1, -1,
-    /* other registers */
-    PT_PR,
-    PT_CR_IIP,	/* ip */
-    PT_CR_IPSR, /* psr */
-    PT_CFM,	/* cfm */
-    /* kernel registers not visible via ptrace interface (?) */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    /* hole */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    PT_AR_RSC,
-    PT_AR_BSP,
-    PT_AR_BSPSTORE,
-    PT_AR_RNAT,
-    -1,
-    -1,		/* Not available: FCR, IA32 floating control register */
-    -1, -1,
-    -1,		/* Not available: EFLAG */
-    -1,		/* Not available: CSD */
-    -1,		/* Not available: SSD */
-    -1,		/* Not available: CFLG */
-    -1,		/* Not available: FSR */
-    -1,		/* Not available: FIR */
-    -1,		/* Not available: FDR */
-    -1,
-    PT_AR_CCV,
-    -1, -1, -1,
-    PT_AR_UNAT,
-    -1, -1, -1,
-    PT_AR_FPSR,
-    -1, -1, -1,
-    -1,		/* Not available: ITC */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    PT_AR_PFS,
-    PT_AR_LC,
-    -1,		/* Not available: EC, the Epilog Count register */
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1,
-    /* nat bits - not fetched directly; instead we obtain these bits from
-       either rnat or unat or from memory. */
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1,
-  };
-
-int
-ia64_register_u_addr (int blockend, int regnum)
-{
-  int addr;
-
-  if (regnum < 0 || regnum >= NUM_REGS)
-    error ("Invalid register number %d.", regnum);
-
-  addr = u_offsets[regnum];
-  if (addr == -1)
-    addr = 0;
-
-  return addr;
-}
-
-static void
-initialize_arch (void)
-{
-  return;
-}
-
-#elif defined(ARM_GNULINUX_TARGET)
-int arm_register_u_addr(blockend, regnum)
-     int blockend;
-     int regnum;
-{
-  return blockend + REGISTER_BYTE(regnum);  
-}
-
-static void
-initialize_arch ()
-{
-}
-#endif
-
-CORE_ADDR
-register_addr (int regno, CORE_ADDR blockend)
-{
-  CORE_ADDR addr;
-
-  if (regno < 0 || regno >= NUM_REGS)
-    error ("Invalid register number %d.", regno);
-
-  REGISTER_U_ADDR (addr, blockend, regno);
-
-  return addr;
-}
-
-/* Fetch one register.  */
-
-static void
-fetch_register (int regno)
-{
-  CORE_ADDR regaddr;
-  register int i;
-
-  /* Offset of registers within the u area.  */
-  unsigned int offset;
-
-  offset = U_REGS_OFFSET;
-
-  regaddr = register_addr (regno, offset);
-  for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
-    {
-      errno = 0;
-      *(PTRACE_XFER_TYPE *) &registers[REGISTER_BYTE (regno) + i] =
-	ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0);
-      regaddr += sizeof (PTRACE_XFER_TYPE);
-      if (errno != 0)
-	{
-	  /* Warning, not error, in case we are attached; sometimes the
-	     kernel doesn't let us at the registers.  */
-	  char *err = strerror (errno);
-	  char *msg = alloca (strlen (err) + 128);
-	  sprintf (msg, "reading register %d: %s", regno, err);
-	  error (msg);
-	  goto error_exit;
-	}
-    }
-error_exit:;
-}
-
-/* Fetch all registers, or just one, from the child process.  */
-
-void
-fetch_inferior_registers (int regno)
-{
-  if (regno == -1 || regno == 0)
-    for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
-      fetch_register (regno);
-  else
-    fetch_register (regno);
-}
-
-/* Store our register values back into the inferior.
-   If REGNO is -1, do this for all registers.
-   Otherwise, REGNO specifies which register (so we can save time).  */
-
-void
-store_inferior_registers (int regno)
-{
-  CORE_ADDR regaddr;
-  int i;
-  unsigned int offset = U_REGS_OFFSET;
-
-  if (regno >= 0)
-    {
-#if 0
-      if (CANNOT_STORE_REGISTER (regno))
-	return;
-#endif
-      regaddr = register_addr (regno, offset);
-      errno = 0;
-#if 0
-      if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
-	{
-	  scratch = *(int *) &registers[REGISTER_BYTE (regno)] | 0x3;
-	  ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		  scratch, 0);
-	  if (errno != 0)
-	    {
-	      /* Error, even if attached.  Failing to write these two
-	         registers is pretty serious.  */
-	      sprintf (buf, "writing register number %d", regno);
-	      perror_with_name (buf);
-	    }
-	}
-      else
-#endif
-	for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
-	  {
-	    errno = 0;
-	    ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
-		    *(int *) &registers[REGISTER_BYTE (regno) + i]);
-	    if (errno != 0)
-	      {
-		/* Warning, not error, in case we are attached; sometimes the
-		   kernel doesn't let us at the registers.  */
-		char *err = strerror (errno);
-		char *msg = alloca (strlen (err) + 128);
-		sprintf (msg, "writing register %d: %s",
-			 regno, err);
-		error (msg);
-		return;
-	      }
-	    regaddr += sizeof (int);
-	  }
-    }
-  else
-    for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
-      store_inferior_registers (regno);
-}
-
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
-   in the NEW_SUN_PTRACE case.
-   It ought to be straightforward.  But it appears that writing did
-   not write the data that I specified.  I cannot understand where
-   it got the data that it actually did write.  */
-
-/* Copy LEN bytes from inferior's memory starting at MEMADDR
-   to debugger memory starting at MYADDR.  */
-
-void
-read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
-{
-  register int i;
-  /* Round starting address down to longword boundary.  */
-  register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
-  /* Round ending address up; get number of longwords that makes.  */
-  register int count 
-    = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) 
-      / sizeof (PTRACE_XFER_TYPE);
-  /* Allocate buffer of that many longwords.  */
-  register PTRACE_XFER_TYPE *buffer 
-    = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
-
-  /* Read all the longwords */
-  for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
-    {
-      buffer[i] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0);
-    }
-
-  /* Copy appropriate bytes out of the buffer.  */
-  memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), len);
-}
-
-/* Copy LEN bytes of data from debugger memory at MYADDR
-   to inferior's memory at MEMADDR.
-   On failure (cannot write the inferior)
-   returns the value of errno.  */
-
-int
-write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
-{
-  register int i;
-  /* Round starting address down to longword boundary.  */
-  register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
-  /* Round ending address up; get number of longwords that makes.  */
-  register int count
-  = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) / sizeof (PTRACE_XFER_TYPE);
-  /* Allocate buffer of that many longwords.  */
-  register PTRACE_XFER_TYPE *buffer = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
-  extern int errno;
-
-  /* Fill start and end extra bytes of buffer with existing memory data.  */
-
-  buffer[0] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0);
-
-  if (count > 1)
-    {
-      buffer[count - 1]
-	= ptrace (PTRACE_PEEKTEXT, inferior_pid,
-		  addr + (count - 1) * sizeof (PTRACE_XFER_TYPE), 0);
-    }
-
-  /* Copy data to be written over corresponding part of buffer */
-
-  memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), myaddr, len);
-
-  /* Write the entire buffer.  */
-
-  for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
-    {
-      errno = 0;
-      ptrace (PTRACE_POKETEXT, inferior_pid, addr, buffer[i]);
-      if (errno)
-	return errno;
-    }
-
-  return 0;
-}
-
-void
-initialize_low (void)
-{
-  initialize_arch ();
-}
diff --git a/gdb/gdbserver/regcache.c b/gdb/gdbserver/regcache.c
new file mode 100644
index 00000000000..551a71a349a
--- /dev/null
+++ b/gdb/gdbserver/regcache.c
@@ -0,0 +1,124 @@
+/* Register support routines for the remote server for GDB.
+   Copyright 2001, 2002
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "server.h"
+#include "regdef.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+static char *registers;
+static int register_bytes;
+
+static struct reg *reg_defs;
+static int num_registers;
+
+const char **gdbserver_expedite_regs;
+
+int
+registers_length (void)
+{
+  return 2 * register_bytes;
+}
+
+void
+set_register_cache (struct reg *regs, int n)
+{
+  int offset, i;
+  
+  reg_defs = regs;
+  num_registers = n;
+
+  offset = 0;
+  for (i = 0; i < n; i++)
+    {
+      regs[i].offset = offset;
+      offset += regs[i].size;
+    }
+
+  register_bytes = offset / 8;
+  registers = malloc (offset / 8);
+  if (!registers)
+    fatal ("Could not allocate register cache.");
+}
+
+void
+registers_to_string (char *buf)
+{
+  convert_int_to_ascii (registers, buf, register_bytes);
+}
+
+void
+registers_from_string (char *buf)
+{
+  int len = strlen (buf);
+
+  if (len != register_bytes * 2)
+    {
+      warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len);
+      if (len > register_bytes * 2)
+	len = register_bytes * 2;
+    }
+  convert_ascii_to_int (buf, registers, len / 2);
+}
+
+struct reg *
+find_register_by_name (const char *name)
+{
+  int i;
+
+  for (i = 0; i < num_registers; i++)
+    if (!strcmp (name, reg_defs[i].name))
+      return &reg_defs[i];
+  fatal ("Unknown register %s requested", name);
+  return 0;
+}
+
+int
+find_regno (const char *name)
+{
+  int i;
+
+  for (i = 0; i < num_registers; i++)
+    if (!strcmp (name, reg_defs[i].name))
+      return i;
+  fatal ("Unknown register %s requested", name);
+  return -1;
+}
+
+struct reg *
+find_register_by_number (int n)
+{
+  return &reg_defs[n];
+}
+
+int
+register_size (int n)
+{
+  return reg_defs[n].size / 8;
+}
+
+char *
+register_data (int n)
+{
+  return registers + (reg_defs[n].offset / 8);
+}
+
diff --git a/gdb/gdbserver/regcache.h b/gdb/gdbserver/regcache.h
new file mode 100644
index 00000000000..07195b3f44e
--- /dev/null
+++ b/gdb/gdbserver/regcache.h
@@ -0,0 +1,49 @@
+/* Register support routines for the remote server for GDB.
+   Copyright 2001, 2002 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef REGCACHE_H
+#define REGCACHE_H
+
+/* Convert all registers to a string in the currently specified remote
+   format.  */
+
+void registers_to_string (char *buf);
+
+/* Convert a string to register values and fill our register cache.  */
+
+void registers_from_string (char *buf);
+
+/* Return the size in bytes of a string-encoded register packet.  */
+
+int registers_length (void);
+
+/* Return a pointer to the description of register ``n''.  */
+
+struct reg *find_register_by_number (int n);
+
+char *register_data (int n);
+
+int register_size (int n);
+
+int find_regno (const char *name);
+
+extern const char **gdbserver_expedite_regs;
+
+#endif /* REGCACHE_H */
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index cfde0a7dae4..ff1718fc089 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -1,5 +1,6 @@
 /* Remote utility routines for the remote server for GDB.
-   Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+   Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+   2002
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -183,6 +184,7 @@ fromhex (int a)
     return a - 'a' + 10;
   else
     error ("Reply contains invalid hex digit");
+  return 0;
 }
 
 /* Convert number NIB to a hex digit.  */
@@ -204,11 +206,13 @@ putpkt (char *buf)
 {
   int i;
   unsigned char csum = 0;
-  char buf2[PBUFSIZ];
+  char *buf2;
   char buf3[1];
   int cnt = strlen (buf);
   char *p;
 
+  buf2 = malloc (PBUFSIZ);
+
   /* Copy the packet into buffer BUF2, encapsulating it
      and giving it a checksum.  */
 
@@ -250,11 +254,13 @@ putpkt (char *buf)
 	  else
 	    perror ("putpkt(read)");
 
+	  free (buf2);
 	  return -1;
 	}
     }
   while (buf3[0] != '+');
 
+  free (buf2);
   return 1;			/* Success! */
 }
 
@@ -264,7 +270,7 @@ putpkt (char *buf)
    will cause us to send a SIGINT to the child.  */
 
 static void
-input_interrupt (void)
+input_interrupt (int unused)
 {
   fd_set readset;
   struct timeval immediate = { 0, 0 };
@@ -440,7 +446,7 @@ convert_ascii_to_int (char *from, char *to, int n)
 static char *
 outreg (int regno, char *buf)
 {
-  int regsize = REGISTER_RAW_SIZE (regno);
+  int regsize = register_size (regno);
 
   if ((regno >> 12) != 0)
     *buf++ = tohex ((regno >> 12) & 0xf);
@@ -449,7 +455,7 @@ outreg (int regno, char *buf)
   *buf++ = tohex ((regno >> 4) & 0xf);
   *buf++ = tohex (regno & 0xf);
   *buf++ = ':';
-  convert_int_to_ascii (&registers[REGISTER_BYTE (regno)], buf, regsize);
+  convert_int_to_ascii (register_data (regno), buf, regsize);
   buf += 2 * regsize;
   *buf++ = ';';
 
@@ -474,30 +480,15 @@ prepare_resume_reply (char *buf, char status, unsigned char signo)
 
   if (status == 'T')
     {
-#ifdef GDBSERVER_RESUME_REGS
-      static int gdbserver_resume_regs[] = GDBSERVER_RESUME_REGS ;
-      int i;
-      for (i = 0; 
-           i < sizeof (gdbserver_resume_regs) 
-	        / sizeof (gdbserver_resume_regs[0]);
-	   i++)
+      const char **regp = gdbserver_expedite_regs;
+      while (*regp)
 	{
-	  int regnum = gdbserver_resume_regs[i];
-	  buf = outreg (regnum, buf);
+	  buf = outreg (find_regno (*regp), buf);
+	  regp ++;
 	}
-#else /* !defined(GDBSERVER_RESUME_REGS) */
-      buf = outreg (PC_REGNUM, buf);
-      buf = outreg (FP_REGNUM, buf);
-      buf = outreg (SP_REGNUM, buf);
-      if (NPC_REGNUM >= 0)
-	buf = outreg (NPC_REGNUM, buf);
-#ifdef O7_REGNUM
-      buf = outreg (O7_REGNUM, buf);
-#endif
-#endif /* GDBSERVER_RESUME_REGS */
 
       /* If the debugger hasn't used any thread features, don't burden it with
-         threads.  If we didn't check this, GDB 4.13 and older would choke.  */
+	 threads.  If we didn't check this, GDB 4.13 and older would choke.  */
       if (cont_thread != 0)
 	{
 	  if (old_thread_from_wait != thread_from_wait)
diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index d995127a223..d845422a698 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -59,7 +59,7 @@ extern int remote_debug;
 int
 main (int argc, char *argv[])
 {
-  char ch, status, own_buf[PBUFSIZ], mem_buf[2000];
+  char ch, status, *own_buf, mem_buf[2000];
   int i = 0;
   unsigned char signal;
   unsigned int len;
@@ -94,6 +94,8 @@ main (int argc, char *argv[])
 
   initialize_low ();
 
+  own_buf = malloc (PBUFSIZ);
+
   if (pid == 0)
     {
       /* Wait till we are at first instruction in program.  */
@@ -167,10 +169,10 @@ main (int argc, char *argv[])
 		}
 	      break;
 	    case 'g':
-	      convert_int_to_ascii (registers, own_buf, REGISTER_BYTES);
+	      registers_to_string (own_buf);
 	      break;
 	    case 'G':
-	      convert_ascii_to_int (&own_buf[1], registers, REGISTER_BYTES);
+	      registers_from_string (&own_buf[1]);
 	      store_inferior_registers (-1);
 	      write_ok (own_buf);
 	      break;
diff --git a/gdb/gdbserver/server.h b/gdb/gdbserver/server.h
index 2e0b7ba15f2..6202b0fc1ae 100644
--- a/gdb/gdbserver/server.h
+++ b/gdb/gdbserver/server.h
@@ -1,5 +1,5 @@
 /* Common definitions for remote server for GDB.
-   Copyright 1993, 1995, 1997, 1998, 1999, 2000
+   Copyright 1993, 1995, 1997, 1998, 1999, 2000, 2002
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -19,7 +19,22 @@
    Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include "defs.h"
+#ifndef SERVER_H
+#define SERVER_H
+
+#include "config.h"
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+
+/* FIXME:  Both of these should be autoconf'd for.  */
+#define NORETURN
+typedef long long CORE_ADDR;
+
+#include "regcache.h"
+
 #include <setjmp.h>
 
 /* Target-specific functions */
@@ -73,6 +88,10 @@ void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
 /* Functions from utils.c */
 
 void perror_with_name (char *string);
+void error (const char *string,...);
+void fatal (const char *string,...);
+void warning (const char *string,...);
+
 
 
 /* Maximum number of bytes to read/write at once.  The value here
@@ -81,6 +100,8 @@ void perror_with_name (char *string);
 
 /* Buffer sizes for transferring memory, registers, etc.  Round up PBUFSIZ to
    hold all the registers, at least.  */
-#define	PBUFSIZ ((REGISTER_BYTES > MAXBUFBYTES (2000)) \
-		 ? (REGISTER_BYTES * 2 + 32) \
+#define	PBUFSIZ ((registers_length () + 32 > 2000) \
+		 ? (registers_length () + 32) \
 		 : 2000)
+
+#endif /* SERVER_H */
diff --git a/gdb/gdbserver/utils.c b/gdb/gdbserver/utils.c
index cd9f8c39208..a8ea9a15f8b 100644
--- a/gdb/gdbserver/utils.c
+++ b/gdb/gdbserver/utils.c
@@ -1,5 +1,5 @@
 /* General utility routines for the remote server for GDB.
-   Copyright 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000
+   Copyright 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000, 2002
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -75,7 +75,7 @@ error (const char *string,...)
 
 /* VARARGS */
 NORETURN void
-fatal (char *string,...)
+fatal (const char *string,...)
 {
   va_list args;
   va_start (args, string);
@@ -85,3 +85,15 @@ fatal (char *string,...)
   va_end (args);
   exit (1);
 }
+
+/* VARARGS */
+void
+warning (const char *string,...)
+{
+  va_list args;
+  va_start (args, string);
+  fprintf (stderr, "gdb: ");
+  vfprintf (stderr, string, args);
+  fprintf (stderr, "\n");
+  va_end (args);
+}
diff --git a/gdb/regformats/regdat.sh b/gdb/regformats/regdat.sh
index eb0475e4ddb..9035b3dc90d 100755
--- a/gdb/regformats/regdat.sh
+++ b/gdb/regformats/regdat.sh
@@ -123,6 +123,7 @@ EOF
 exec > new-$2
 copyright $1
 echo '#include "regdef.h"'
+echo '#include "regcache.h"'
 echo
 offset=0
 i=0
@@ -151,6 +152,17 @@ done
 echo "};"
 echo
 echo "const char *expedite_regs_${name}[] = { \"`echo ${expedite} | sed 's/,/", "/g'`\", 0 };"
+echo
+
+cat <<EOF
+void
+init_registers ()
+{
+    set_register_cache (regs_${name},
+			sizeof (regs_${name}) / sizeof (regs_${name}[0]));
+    gdbserver_expedite_regs = expedite_regs_${name};
+}
+EOF
 
 # close things off
 exec 1>&2
diff --git a/gdb/regformats/regdef.h b/gdb/regformats/regdef.h
index 17174ee3c67..c1f862cc356 100644
--- a/gdb/regformats/regdef.h
+++ b/gdb/regformats/regdef.h
@@ -18,6 +18,9 @@
    Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#ifndef REGDEF_H
+#define REGDEF_H
+
 struct reg
 {
   /* The name of this register - NULL for pad entries.  */
@@ -34,3 +37,10 @@ struct reg
   /* The size (in bits) of the value of this register, as transmitted.  */
   int size;
 };
+
+/* Set the current remote protocol and register cache according to the array
+   ``regs'', with ``n'' elements.  */
+
+void set_register_cache (struct reg *regs, int n);
+
+#endif /* REGDEF_H */