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.

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;
+}