gdb/

	* features/mips-dsp.xml: New file.
	* features/mips64-dsp.xml: New file.
	* features/mips-dsp-linux.xml: New file.
	* features/mips64-dsp-linux.xml: New file.
	* features/Makefile (WHICH): Add mips-dsp-linux and
	mips64-dsp-linux.
	(mips-dsp-expedite, mips64-dsp-expedite): New variables.
	* features/mips-dsp-linux.c: New file.
	* features/mips64-dsp-linux.c: New file.
	* regformats/mips-dsp-linux.dat: New file.
	* regformats/mips64-dsp-linux.dat: New file.
	* mips-linux-nat.c (mips_linux_register_addr): Handle DSP
	registers.
	(mips64_linux_register_addr): Likewise.
	(mips64_linux_regsets_fetch_registers): Likewise.
	(mips64_linux_regsets_store_registers): Likewise.
	(mips64_linux_fetch_registers): Update call to
	mips64_linux_regsets_fetch_registers.
	(mips64_linux_store_registers): Update call to
	mips64_linux_regsets_store_registers.
	(mips_linux_read_description): Probe for DSP registers.
	(_initialize_mips_linux_nat): Call initialize_tdesc_mips_dsp_linux
	and initialize_tdesc_mips64_dsp_linux.
	* mips-linux-tdep.c (supply_gregset, mips64_supply_gregset):
	Remove padding of no longer used embedded register slots.
	* mips-linux-tdep.h (DSP_BASE, DSP_CONTROL): New macros.
	(MIPS_RESTART_REGNUM): Redefine enum value.
	* mips-tdep.c (mips_generic_reg_names): Remove trailing null
	strings.
	(mips_tx39_reg_names): Likewise.
	(mips_linux_reg_names): New array of register names for Linux
	targets.
	(mips_register_name): Check for a null pointer in
	mips_processor_reg_names and return an empty string.
	(mips_register_type): Exclude embedded registers for the IRIX
	and Linux ABIs.
	(mips_pseudo_register_type): Likewise.  Use dynamic numbers to
	refer to FP registers, LO, HI, BadVAddr, Cause and PC.  Handle
	DSP registers.
	(mips_stab_reg_to_regnum): Handle DSP accumulators.
	(mips_dwarf_dwarf2_ecoff_reg_to_regnum): Likewise.
	(mips_gdbarch_init): Likewise.  Initialize internal register
	indices for the Linux ABI.  Use dynamic numbers to refer to
	registers, as applicable, while parsing the target description.
	* mips-tdep.h (struct mips_regnum): Add dspacc/dspctl offsets.

	gdb/doc/
	* gdb.texinfo (MIPS Features): Add org.gnu.gdb.mips.dsp.

	gdb/gdbserver/
	* linux-low.h (linux_target_ops): Add regset_bitmap member.
	* linux-low.c (use_linux_regsets): New macro.
	[!HAVE_LINUX_REGSETS] (regsets_fetch_inferior_registers): Likewise.
	[!HAVE_LINUX_REGSETS] (regsets_store_inferior_registers): Likewise.
	(linux_register_in_regsets): New function.
	(usr_fetch_inferior_registers): Skip registers covered by
	regsets.
	(usr_store_inferior_registers): Likewise.
	(usr_fetch_inferior_registers): New macro.
	(usr_store_inferior_registers): Likewise.
	(linux_fetch_registers): Handle mixed regset/non-regset targets.
	(linux_store_registers): Likewise.
	* linux-mips-low.c (init_registers_mips_dsp_linux): New
	prototype.
	(init_registers_mips64_dsp_linux): Likewise.
	(init_registers_mips_linux): New macro.
	(init_registers_mips_dsp_linux): Likewise.
	(mips_dsp_num_regs): Likewise.
	(DSP_BASE, DSP_CONTROL): New fallback macros.
	(mips_base_regs): New macro.
	(mips_regmap): Use it.  Fix the size.
	(mips_dsp_regmap): New variable.
	(mips_dsp_regset_bitmap): Likewise.
	(mips_arch_setup): New function.
	(mips_cannot_fetch_register): Use the_low_target.regmap rather
	than mips_regmap.
	(mips_cannot_store_register): Likewise.
	(the_low_target): Update .arch_setup, .num_regs and .regmap
	initializers.  Add .regset_bitmap initializer.
	* linux-arm-low.c (the_low_target): Add .regset_bitmap
	initializer.
	* linux-bfin-low.c (the_low_target): Likewise.
	* linux-cris-low.c (the_low_target): Likewise.
	* linux-crisv32-low.c (the_low_target): Likewise.
	* linux-ia64-low.c (the_low_target): Likewise.
	* linux-m32r-low.c (the_low_target): Likewise.
	* linux-m68k-low.c (the_low_target): Likewise.
	* linux-ppc-low.c (the_low_target): Likewise.
	* linux-s390-low.c (the_low_target): Likewise.
	* linux-sh-low.c (the_low_target): Likewise.
	* linux-sparc-low.c (the_low_target): Likewise.
	* linux-tic6x-low.c (the_low_target): Likewise.
	* linux-x86-low.c (the_low_target): Likewise.
	* linux-xtensa-low.c (the_low_target): Likewise.
	* configure.srv <mips*-*-linux*>: Add mips-dsp-linux.o and
	mips64-dsp-linux.o to srv_regobj.  Add mips-dsp-linux.xml,
	mips64-dsp-linux.xml, mips-dsp.xml and mips64-dsp.xml to
	srv_xmlfiles.
	* Makefile.in (mips-dsp-linux.o, mips-dsp-linux.c): New targets.
	(mips64-dsp-linux.o, mips64-dsp-linux.c): Likewise.

	gdb/testsuite/
	* gdb.xml/tdesc-regs.exp: Add "mips-dsp.xml" to the list of MIPS
	core registers.

1 files changed, 103 insertions, 11 deletions

diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c
index dac5eca4263..af472df0441 100644
--- a/gdb/mips-linux-nat.c
+++ b/gdb/mips-linux-nat.c
@@ -36,7 +36,9 @@
 #include <sys/ptrace.h>
 
 #include "features/mips-linux.c"
+#include "features/mips-dsp-linux.c"
 #include "features/mips64-linux.c"
+#include "features/mips64-dsp-linux.c"
 
 #ifndef PTRACE_GET_THREAD_AREA
 #define PTRACE_GET_THREAD_AREA 25
@@ -94,6 +96,12 @@ mips_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
     regaddr = FPC_CSR;
   else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
     regaddr = store? (CORE_ADDR) -1 : FPC_EIR;
+  else if (mips_regnum (gdbarch)->dspacc != -1
+	   && regno >= mips_regnum (gdbarch)->dspacc
+	   && regno < mips_regnum (gdbarch)->dspacc + 6)
+    regaddr = DSP_BASE + (regno - mips_regnum (gdbarch)->dspacc);
+  else if (regno == mips_regnum (gdbarch)->dspctl)
+    regaddr = DSP_CONTROL;
   else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
     regaddr = 0;
   else
@@ -129,6 +137,12 @@ mips64_linux_register_addr (struct gdbarch *gdbarch, int regno, int store)
     regaddr = MIPS64_FPC_CSR;
   else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
     regaddr = store? (CORE_ADDR) -1 : MIPS64_FPC_EIR;
+  else if (mips_regnum (gdbarch)->dspacc != -1
+	   && regno >= mips_regnum (gdbarch)->dspacc
+	   && regno < mips_regnum (gdbarch)->dspacc + 6)
+    regaddr = DSP_BASE + (regno - mips_regnum (gdbarch)->dspacc);
+  else if (regno == mips_regnum (gdbarch)->dspctl)
+    regaddr = DSP_CONTROL;
   else if (mips_linux_restart_reg_p (gdbarch) && regno == MIPS_RESTART_REGNUM)
     regaddr = 0;
   else
@@ -201,10 +215,13 @@ fill_fpregset (const struct regcache *regcache,
    using PTRACE_GETREGS et al.  */
 
 static void
-mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno)
+mips64_linux_regsets_fetch_registers (struct target_ops *ops,
+				      struct regcache *regcache, int regno)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  int is_fp;
+  int is_fp, is_dsp;
+  int have_dsp;
+  int regi;
   int tid;
 
   if (regno >= mips_regnum (gdbarch)->fp0
@@ -217,11 +234,23 @@ mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno)
   else
     is_fp = 0;
 
+  /* DSP registers are optional and not a part of any set.  */
+  have_dsp = mips_regnum (gdbarch)->dspctl != -1;
+  if (!have_dsp)
+    is_dsp = 0;
+  else if (regno >= mips_regnum (gdbarch)->dspacc
+      && regno < mips_regnum (gdbarch)->dspacc + 6)
+    is_dsp = 1;
+  else if (regno == mips_regnum (gdbarch)->dspctl)
+    is_dsp = 1;
+  else
+    is_dsp = 0;
+
   tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
     tid = ptid_get_pid (inferior_ptid);
 
-  if (regno == -1 || !is_fp)
+  if (regno == -1 || (!is_fp && !is_dsp))
     {
       mips64_elf_gregset_t regs;
 
@@ -257,17 +286,30 @@ mips64_linux_regsets_fetch_registers (struct regcache *regcache, int regno)
       mips64_supply_fpregset (regcache,
 			      (const mips64_elf_fpregset_t *) &fp_regs);
     }
+
+  if (is_dsp)
+    super_fetch_registers (ops, regcache, regno);
+  else if (regno == -1 && have_dsp)
+    {
+      for (regi = mips_regnum (gdbarch)->dspacc;
+	   regi < mips_regnum (gdbarch)->dspacc + 6;
+	   regi++)
+	super_fetch_registers (ops, regcache, regi);
+      super_fetch_registers (ops, regcache, mips_regnum (gdbarch)->dspctl);
+    }
 }
 
 /* Store REGNO (or all registers if REGNO == -1) to the target
    using PTRACE_SETREGS et al.  */
 
 static void
-mips64_linux_regsets_store_registers (const struct regcache *regcache,
-				      int regno)
+mips64_linux_regsets_store_registers (struct target_ops *ops,
+				      struct regcache *regcache, int regno)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  int is_fp;
+  int is_fp, is_dsp;
+  int have_dsp;
+  int regi;
   int tid;
 
   if (regno >= mips_regnum (gdbarch)->fp0
@@ -280,11 +322,23 @@ mips64_linux_regsets_store_registers (const struct regcache *regcache,
   else
     is_fp = 0;
 
+  /* DSP registers are optional and not a part of any set.  */
+  have_dsp = mips_regnum (gdbarch)->dspctl != -1;
+  if (!have_dsp)
+    is_dsp = 0;
+  if (regno >= mips_regnum (gdbarch)->dspacc
+      && regno < mips_regnum (gdbarch)->dspacc + 6)
+    is_dsp = 1;
+  else if (regno == mips_regnum (gdbarch)->dspctl)
+    is_dsp = 1;
+  else
+    is_dsp = 0;
+
   tid = ptid_get_lwp (inferior_ptid);
   if (tid == 0)
     tid = ptid_get_pid (inferior_ptid);
 
-  if (regno == -1 || !is_fp)
+  if (regno == -1 || (!is_fp && !is_dsp))
     {
       mips64_elf_gregset_t regs;
 
@@ -311,6 +365,17 @@ mips64_linux_regsets_store_registers (const struct regcache *regcache,
 		  (PTRACE_TYPE_ARG3) &fp_regs) == -1)
 	perror_with_name (_("Couldn't set FP registers"));
     }
+
+  if (is_dsp)
+    super_store_registers (ops, regcache, regno);
+  else if (regno == -1 && have_dsp)
+    {
+      for (regi = mips_regnum (gdbarch)->dspacc;
+	   regi < mips_regnum (gdbarch)->dspacc + 6;
+	   regi++)
+	super_store_registers (ops, regcache, regi);
+      super_store_registers (ops, regcache, mips_regnum (gdbarch)->dspctl);
+    }
 }
 
 /* Fetch REGNO (or all registers if REGNO == -1) from the target
@@ -322,7 +387,7 @@ mips64_linux_fetch_registers (struct target_ops *ops,
 {
   /* Unless we already know that PTRACE_GETREGS does not work, try it.  */
   if (have_ptrace_regsets)
-    mips64_linux_regsets_fetch_registers (regcache, regnum);
+    mips64_linux_regsets_fetch_registers (ops, regcache, regnum);
 
   /* If we know, or just found out, that PTRACE_GETREGS does not work, fall
      back to PTRACE_PEEKUSER.  */
@@ -339,7 +404,7 @@ mips64_linux_store_registers (struct target_ops *ops,
 {
   /* Unless we already know that PTRACE_GETREGS does not work, try it.  */
   if (have_ptrace_regsets)
-    mips64_linux_regsets_store_registers (regcache, regnum);
+    mips64_linux_regsets_store_registers (ops, regcache, regnum);
 
   /* If we know, or just found out, that PTRACE_GETREGS does not work, fall
      back to PTRACE_PEEKUSER.  */
@@ -362,12 +427,37 @@ mips_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)
 static const struct target_desc *
 mips_linux_read_description (struct target_ops *ops)
 {
+  static int have_dsp = -1;
+
+  if (have_dsp < 0)
+    {
+      int tid;
+
+      tid = ptid_get_lwp (inferior_ptid);
+      if (tid == 0)
+	tid = ptid_get_pid (inferior_ptid);
+
+      ptrace (PTRACE_PEEKUSER, tid, DSP_CONTROL, 0);
+      switch (errno)
+	{
+	case 0:
+	  have_dsp = 1;
+	  break;
+	case EIO:
+	  have_dsp = 0;
+	  break;
+	default:
+	  perror_with_name ("ptrace");
+	  break;
+	}
+    }
+
   /* Report that target registers are a size we know for sure
      that we can get from ptrace.  */
   if (_MIPS_SIM == _ABIO32)
-    return tdesc_mips_linux;
+    return have_dsp ? tdesc_mips_dsp_linux : tdesc_mips_linux;
   else
-    return tdesc_mips64_linux;
+    return have_dsp ? tdesc_mips64_dsp_linux : tdesc_mips64_linux;
 }
 
 #ifndef PTRACE_GET_WATCH_REGS
@@ -1088,5 +1178,7 @@ triggers a breakpoint or watchpoint."),
 
   /* Initialize the standard target descriptions.  */
   initialize_tdesc_mips_linux ();
+  initialize_tdesc_mips_dsp_linux ();
   initialize_tdesc_mips64_linux ();
+  initialize_tdesc_mips64_dsp_linux ();
 }