gdb/ChangeLog:

2004-07-20  Jim Blandy  <jimb@redhat.com>

	Use a fixed register numbering when communicating with the PowerPC
	simulator.
	* ppc-tdep.h (struct gdbarch_tdep): New member: 'sim_regno'.
	* rs6000-tdep.c: #include "sim-regno.h" and "gdb/sim-ppc.h".
	(set_sim_regno, init_sim_regno_table, rs6000_register_sim_regno):
	New functions.
	(rs6000_gdbarch_init): Register rs6000_register_sim_regno.  Call
	init_sim_regno_table.
	* Makefile.in (gdb_sim_ppc_h): New variable.
	(rs6000-tdep.o): Update dependencies.

include/gdb/ChangeLog:
2004-07-20  Jim Blandy  <jimb@redhat.com>

	* sim-ppc.h: New file.

sim/ppc/ChangeLog:
2004-07-20  Jim Blandy  <jimb@redhat.com>

	Use a fixed register numbering when communicating with the PowerPC
	simulator.
	* sim_calls.c: #include "registers.h" and "gdb/sim-ppc.h"; do not
	include GDB's "defs.h".
	(gdb_register_name_table): New variable.
	(gdb_register_name_table_size): New enum constant.
	(gdb_register_name): New function.
	(sim_fetch_register, sim_store_register): Use gdb_register_name,
	instead of calling gdbarch_register_name.
	* Makefile.in (GDB_SIM_PPC_H): New variable.
	(DEFS_H): Delete variable.
	(sim_calls.o): Update dependencies.

4 files changed, 126 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 11b07ea6539..08bd11cde5d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,16 @@
+2004-08-04  Jim Blandy  <jimb@redhat.com>
+
+	Use a fixed register numbering when communicating with the PowerPC
+	simulator.
+	* ppc-tdep.h (struct gdbarch_tdep): New member: 'sim_regno'.
+	* rs6000-tdep.c: #include "sim-regno.h" and "gdb/sim-ppc.h".
+	(set_sim_regno, init_sim_regno_table, rs6000_register_sim_regno): 
+	New functions.
+	(rs6000_gdbarch_init): Register rs6000_register_sim_regno.  Call
+	init_sim_regno_table.
+	* Makefile.in (gdb_sim_ppc_h): New variable.
+	(rs6000-tdep.o): Update dependencies.
+
 2004-08-02  Andrew Cagney  <cagney@gnu.org>
 
 	* cris-tdep.c (cris_register_size): Restore function, still used
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 56d9ef6225d..27ca01af5af 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -593,6 +593,7 @@ gdb_callback_h = $(INCLUDE_DIR)/gdb/callback.h
 gdb_sim_arm_h =	$(INCLUDE_DIR)/gdb/sim-arm.h
 gdb_sim_d10v_h = $(INCLUDE_DIR)/gdb/sim-d10v.h
 gdb_sim_frv_h = $(INCLUDE_DIR)/gdb/sim-frv.h
+gdb_sim_ppc_h =	$(INCLUDE_DIR)/gdb/sim-ppc.h
 gdb_sim_sh_h =	$(INCLUDE_DIR)/gdb/sim-sh.h
 splay_tree_h =  $(INCLUDE_DIR)/splay-tree.h
 hashtab_h =	$(INCLUDE_DIR)/hashtab.h
@@ -2400,7 +2401,8 @@ rs6000-tdep.o: rs6000-tdep.c $(defs_h) $(frame_h) $(inferior_h) $(symtab_h) \
 	$(osabi_h) $(libbfd_h) $(coff_internal_h) $(libcoff_h) \
 	$(coff_xcoff_h) $(libxcoff_h) $(elf_bfd_h) $(solib_svr4_h) \
 	$(ppc_tdep_h) $(gdb_assert_h) $(dis_asm_h) $(trad_frame_h) \
-	$(frame_unwind_h) $(frame_base_h) $(infcall_h)
+	$(frame_unwind_h) $(frame_base_h) $(infcall_h) $(sim_regno_h) \
+	$(gdb_sim_ppc_h)
 s390-nat.o: s390-nat.c $(defs_h) $(tm_h) $(regcache_h) $(inferior_h) \
 	$(s390_tdep_h)
 s390-tdep.o: s390-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) $(inferior_h) \
diff --git a/gdb/ppc-tdep.h b/gdb/ppc-tdep.h
index 7f8b2b146e7..357c553be34 100644
--- a/gdb/ppc-tdep.h
+++ b/gdb/ppc-tdep.h
@@ -171,6 +171,11 @@ struct gdbarch_tdep
     int ppc_spefscr_regnum;     /* SPE 'spefscr' register */
     int lr_frame_offset;	/* Offset to ABI specific location where
                                    link register is saved.  */
+
+    /* An array of integers, such that sim_regno[I] is the simulator
+       register number for GDB register number I, or -1 if the
+       simulator does not implement that register.  */
+    int *sim_regno;
 };
 
 
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 42a1bcdd0f2..d6f5184cfac 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -37,6 +37,8 @@
 #include "parser-defs.h"
 #include "osabi.h"
 #include "infcall.h"
+#include "sim-regno.h"
+#include "gdb/sim-ppc.h"
 
 #include "libbfd.h"		/* for bfd_default_set_arch_mach */
 #include "coff/internal.h"	/* for libcoff.h */
@@ -182,6 +184,106 @@ ppc_floating_point_unit_p (struct gdbarch *gdbarch)
   return (tdep->ppc_fp0_regnum >= 0
           && tdep->ppc_fpscr_regnum >= 0);
 }
+
+static void
+set_sim_regno (int *table, int gdb_regno, int sim_regno)
+{
+  /* Make sure we don't try to assign any given GDB register a sim
+     register number more than once.  */
+  gdb_assert (table[gdb_regno] == -1);
+  table[gdb_regno] = sim_regno;
+}
+
+static void
+init_sim_regno_table (struct gdbarch *arch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
+  int total_regs = gdbarch_num_regs (arch) + gdbarch_num_pseudo_regs (arch);
+  const struct reg *regs = tdep->regs;
+  int *sim_regno = GDBARCH_OBSTACK_CALLOC (arch, total_regs, int);
+  int i;
+
+  /* Presume that all registers not explicitly mentioned below are
+     unavailable from the sim.  */
+  for (i = 0; i < total_regs; i++)
+    sim_regno[i] = -1;
+
+  /* General-purpose registers.  */
+  for (i = 0; i < ppc_num_gprs; i++)
+    set_sim_regno (sim_regno, tdep->ppc_gp0_regnum + i, sim_ppc_r0_regnum + i);
+  
+  /* Floating-point registers.  */
+  if (tdep->ppc_fp0_regnum >= 0)
+    for (i = 0; i < ppc_num_fprs; i++)
+      set_sim_regno (sim_regno,
+                     tdep->ppc_fp0_regnum + i,
+                     sim_ppc_f0_regnum + i);
+  if (tdep->ppc_fpscr_regnum >= 0)
+    set_sim_regno (sim_regno, tdep->ppc_fpscr_regnum, sim_ppc_fpscr_regnum);
+
+  set_sim_regno (sim_regno, gdbarch_pc_regnum (arch), sim_ppc_pc_regnum);
+  set_sim_regno (sim_regno, tdep->ppc_ps_regnum, sim_ppc_ps_regnum);
+  set_sim_regno (sim_regno, tdep->ppc_cr_regnum, sim_ppc_cr_regnum);
+
+  /* Segment registers.  */
+  if (tdep->ppc_sr0_regnum >= 0)
+    for (i = 0; i < ppc_num_srs; i++)
+      set_sim_regno (sim_regno,
+                     tdep->ppc_sr0_regnum + i,
+                     sim_ppc_sr0_regnum + i);
+
+  /* Altivec registers.  */
+  if (tdep->ppc_vr0_regnum >= 0)
+    {
+      for (i = 0; i < ppc_num_vrs; i++)
+        set_sim_regno (sim_regno,
+                       tdep->ppc_vr0_regnum + i,
+                       sim_ppc_vr0_regnum + i);
+
+      /* FIXME: jimb/2004-07-15: when we have tdep->ppc_vscr_regnum,
+         we can treat this more like the other cases.  */
+      set_sim_regno (sim_regno,
+                     tdep->ppc_vr0_regnum + ppc_num_vrs,
+                     sim_ppc_vscr_regnum);
+    }
+  /* vsave is a special-purpose register, so the code below handles it.  */
+
+  /* SPE APU (E500) registers.  */
+  if (tdep->ppc_ev0_regnum >= 0)
+    for (i = 0; i < ppc_num_gprs; i++)
+      set_sim_regno (sim_regno,
+                     tdep->ppc_ev0_regnum + i,
+                     sim_ppc_ev0_regnum + i);
+  if (tdep->ppc_acc_regnum >= 0)
+    set_sim_regno (sim_regno, tdep->ppc_acc_regnum, sim_ppc_acc_regnum);
+  /* spefscr is a special-purpose register, so the code below handles it.  */
+
+  /* Now handle all special-purpose registers.  Verify that they
+     haven't mistakenly been assigned numbers by any of the above
+     code).  */
+  for (i = 0; i < total_regs; i++)
+    if (regs[i].spr_num >= 0)
+      set_sim_regno (sim_regno, i, regs[i].spr_num + sim_ppc_spr0_regnum);
+
+  /* Drop the initialized array into place.  */
+  tdep->sim_regno = sim_regno;
+}
+
+static int
+rs6000_register_sim_regno (int reg)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  int sim_regno;
+
+  gdb_assert (0 <= reg && reg <= NUM_REGS + NUM_PSEUDO_REGS);
+  sim_regno = tdep->sim_regno[reg];
+
+  if (sim_regno >= 0)
+    return sim_regno;
+  else
+    return LEGACY_SIM_REGNO_IGNORE;
+}
+
 
 
 /* Register set support functions.  */
@@ -2911,6 +3013,7 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_pc_regnum (gdbarch, 64);
   set_gdbarch_sp_regnum (gdbarch, 1);
   set_gdbarch_deprecated_fp_regnum (gdbarch, 1);
+  set_gdbarch_register_sim_regno (gdbarch, rs6000_register_sim_regno);
   if (sysv_abi && wordsize == 8)
     set_gdbarch_return_value (gdbarch, ppc64_sysv_abi_return_value);
   else if (sysv_abi && wordsize == 4)
@@ -3106,6 +3209,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
        set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step);
     }
 
+  init_sim_regno_table (gdbarch);
+
   return gdbarch;
 }