Use a constructor function to create regset structures.

* regset.h (supply_regset_ftype, collect_regset_ftype): New typedefs.
(struct regset): Use supply_regset_ftype.  Add new
'collect_regset' member.
(regset_xmalloc): New declaration.
* regset.c: New file.
* am64-tdep.c (amd64_regset_from_core_section): Use
regset_xmalloc to construct regset structures.
* amd64obsd-tdep.c (amd64obsd_regset_from_core_section): Same.
* i386-tdep.c (i386_regset_from_core_section): Same.
* i386nbsd-tdep.c (i386nbsd_aout_regset_from_core_section): Same.
* i386obsd-tdep.c (i386obsd_aout_regset_from_core_section): Same.
* sparc64fbsd-tdep.c (sparc64fbsd_init_abi): Same.
* sparc64nbsd-tdep.c (sparc64nbsd_init_abi): Same.
* sparc64obsd-tdep.c (sparc64obsd_init_abi): Same.
* sparcnbsd-tdep.c (sparc32nbsd_init_abi): Same.
* Makefile.in (COMMON_OBS): Add regset.o.
(regset.o): New rule.

13 files changed, 104 insertions, 59 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6de6b221531..f73a2d9a1fe 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,15 +1,29 @@
+2004-05-19  Jim Blandy  <jimb@redhat.com>
+
+	Use a constructor function to create regset structures.
+	* regset.h (supply_regset_ftype, collect_regset_ftype): New typedefs.
+	(struct regset): Use supply_regset_ftype.  Add new
+        'collect_regset' member.
+	(regset_xmalloc): New declaration.
+	* regset.c: New file.
+	* am64-tdep.c (amd64_regset_from_core_section): Use
+	regset_xmalloc to construct regset structures.
+	* amd64obsd-tdep.c (amd64obsd_regset_from_core_section): Same.
+	* i386-tdep.c (i386_regset_from_core_section): Same.
+	* i386nbsd-tdep.c (i386nbsd_aout_regset_from_core_section): Same.
+	* i386obsd-tdep.c (i386obsd_aout_regset_from_core_section): Same.
+	* sparc64fbsd-tdep.c (sparc64fbsd_init_abi): Same.
+	* sparc64nbsd-tdep.c (sparc64nbsd_init_abi): Same.
+	* sparc64obsd-tdep.c (sparc64obsd_init_abi): Same.
+	* sparcnbsd-tdep.c (sparc32nbsd_init_abi): Same.
+	* Makefile.in (COMMON_OBS): Add regset.o.
+	(regset.o): New rule.
+
 2004-05-19  Joel Brobecker  <brobecker@gnat.com>
 
 	* config/djgpp/fnchange.lst: Add entries for pthread_cond_wait.exp
 	and pthread_cond_wait.c.
 
-2004-05-18  Jim Blandy  <jimb@redhat.com>
-
-	* rs6000-tdep.c (rs6000_gdbarch_init): Initialize tdep fields
-	before the mach-specific switch, and then let the individual cases
-	override the defaults, rather than leaving them uninitialized
-	until the switch and then setting them in each case.
-
 2004-05-18  Randolph Chung  <tausq@debian.org>
 
 	* hppa-tdep.c (hppa_frame_cache): Check for validity of r31 for
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 8c0813fd749..effe5c1d6b6 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -910,7 +910,7 @@ COMMON_OBS = $(DEPFILES) $(YYOBJ) \
 	frame-base.o \
 	gnu-v2-abi.o gnu-v3-abi.o hpacc-abi.o cp-abi.o cp-support.o \
 	cp-namespace.o \
-	reggroups.o \
+	reggroups.o regset.o \
 	trad-frame.o \
 	tramp-frame.o
 
@@ -2197,6 +2197,7 @@ regcache.o: regcache.c $(defs_h) $(inferior_h) $(target_h) $(gdbarch_h) \
 	$(gdb_string_h) $(gdbcmd_h) $(observer_h)
 reggroups.o: reggroups.c $(defs_h) $(reggroups_h) $(gdbtypes_h) \
 	$(gdb_assert_h) $(regcache_h) $(command_h) $(gdbcmd_h)
+regset.o: regset.c $(defs_h) $(regset_h) $(gdb_assert_h)
 remote.o: remote.c $(defs_h) $(gdb_string_h) $(inferior_h) $(bfd_h) \
 	$(symfile_h) $(target_h) $(gdbcmd_h) $(objfiles_h) $(gdb_stabs_h) \
 	$(gdbthread_h) $(remote_h) $(regcache_h) $(value_h) $(gdb_assert_h) \
diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index 0a85a236e1e..a326811f11d 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -1074,11 +1074,7 @@ amd64_regset_from_core_section (struct gdbarch *gdbarch,
   if (strcmp (sect_name, ".reg2") == 0 && sect_size == tdep->sizeof_fpregset)
     {
       if (tdep->fpregset == NULL)
-	{
-	  tdep->fpregset = XMALLOC (struct regset);
-	  tdep->fpregset->descr = tdep;
-	  tdep->fpregset->supply_regset = amd64_supply_fpregset;
-	}
+        tdep->fpregset = regset_xmalloc (tdep, amd64_supply_fpregset, NULL);
 
       return tdep->fpregset;
     }
diff --git a/gdb/amd64obsd-tdep.c b/gdb/amd64obsd-tdep.c
index f9e0f69fe6e..5ded31d8a05 100644
--- a/gdb/amd64obsd-tdep.c
+++ b/gdb/amd64obsd-tdep.c
@@ -63,11 +63,7 @@ amd64obsd_regset_from_core_section (struct gdbarch *gdbarch,
       && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE)
     {
       if (tdep->gregset == NULL)
-	{
-	  tdep->gregset = XMALLOC (struct regset);
-	  tdep->gregset->descr = tdep;
-	  tdep->gregset->supply_regset = amd64obsd_supply_regset;
-	}
+        tdep->gregset = regset_xmalloc (tdep, amd64obsd_supply_regset, NULL);
       return tdep->gregset;
     }
 
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 5f3952931fe..99810598dbf 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -1662,11 +1662,7 @@ i386_regset_from_core_section (struct gdbarch *gdbarch,
   if (strcmp (sect_name, ".reg") == 0 && sect_size == tdep->sizeof_gregset)
     {
       if (tdep->gregset == NULL)
-	{
-	  tdep->gregset = XMALLOC (struct regset);
-	  tdep->gregset->descr = tdep;
-	  tdep->gregset->supply_regset = i386_supply_gregset;
-	}
+        tdep->gregset = regset_xmalloc (tdep, i386_supply_gregset, NULL);
       return tdep->gregset;
     }
 
@@ -1675,11 +1671,7 @@ i386_regset_from_core_section (struct gdbarch *gdbarch,
 	  && sect_size == I387_SIZEOF_FXSAVE))
     {
       if (tdep->fpregset == NULL)
-	{
-	  tdep->fpregset = XMALLOC (struct regset);
-	  tdep->fpregset->descr = tdep;
-	  tdep->fpregset->supply_regset = i386_supply_fpregset;
-	}
+        tdep->fpregset = regset_xmalloc (tdep, i386_supply_fpregset, NULL);
       return tdep->fpregset;
     }
 
diff --git a/gdb/i386nbsd-tdep.c b/gdb/i386nbsd-tdep.c
index 9fd98839db9..53dbe8af2ab 100644
--- a/gdb/i386nbsd-tdep.c
+++ b/gdb/i386nbsd-tdep.c
@@ -86,11 +86,8 @@ i386nbsd_aout_regset_from_core_section (struct gdbarch *gdbarch,
       && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE)
     {
       if (tdep->gregset == NULL)
-	{
-	  tdep->gregset = XMALLOC (struct regset);
-	  tdep->gregset->descr = tdep;
-	  tdep->gregset->supply_regset = i386nbsd_aout_supply_regset;
-	}
+        tdep->gregset
+          = regset_xmalloc (tdep, i386nbsd_aout_supply_regset, NULL);
       return tdep->gregset;
     }
 
diff --git a/gdb/i386obsd-tdep.c b/gdb/i386obsd-tdep.c
index 0fe066fa20d..a21faabab82 100644
--- a/gdb/i386obsd-tdep.c
+++ b/gdb/i386obsd-tdep.c
@@ -141,11 +141,8 @@ i386obsd_aout_regset_from_core_section (struct gdbarch *gdbarch,
       && sect_size >= tdep->sizeof_gregset + I387_SIZEOF_FSAVE)
     {
       if (tdep->gregset == NULL)
-	{
-	  tdep->gregset = XMALLOC (struct regset);
-	  tdep->gregset->descr = tdep;
-	  tdep->gregset->supply_regset = i386obsd_aout_supply_regset;
-	}
+        tdep->gregset
+          = regset_xmalloc (tdep, i386obsd_aout_supply_regset, NULL);
       return tdep->gregset;
     }
 
diff --git a/gdb/regset.c b/gdb/regset.c
new file mode 100644
index 00000000000..98fb6650c68
--- /dev/null
+++ b/gdb/regset.c
@@ -0,0 +1,39 @@
+/* Regset support functions, for GDB.
+
+   Copyright 2004 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 "defs.h"
+#include "regset.h"
+#include "gdb_assert.h"
+
+
+struct regset *
+regset_xmalloc (void *descr,
+                supply_regset_ftype *supply_regset,
+                collect_regset_ftype *collect_regset)
+{
+  struct regset *r = (struct regset *) xmalloc (sizeof (*r));
+
+  r->descr = descr;
+  r->supply_regset = supply_regset;
+  r->collect_regset = collect_regset;
+
+  return r;
+}
diff --git a/gdb/regset.h b/gdb/regset.h
index 6172f0fecfd..1d4355c5943 100644
--- a/gdb/regset.h
+++ b/gdb/regset.h
@@ -26,6 +26,11 @@ struct gdbarch;
 struct regcache;
 
 /* Data structure describing a register set.  */
+typedef void (supply_regset_ftype) (const struct regset *, struct regcache *,
+                                    int, const void *, size_t);
+typedef void (collect_regset_ftype) (const struct regset *, 
+                                     const struct regcache *,
+                                     int, const void *, size_t);
 
 struct regset
 {
@@ -33,9 +38,23 @@ struct regset
      providing some sort of description of the register set.  */
   const void *descr;
 
-  /* Function supplying a register set to a register cache.  */
-  void (*supply_regset) (const struct regset *, struct regcache *,
-			 int, const void *, size_t);
+  /* Function supplying values in a register set to a register cache.  */
+  supply_regset_ftype *supply_regset;
+
+  /* Function collecting values in a register set from a register cache.  */
+  collect_regset_ftype *collect_regset;
 };
 
+
+/* Allocate a fresh 'struct regset' whose descr is DESCR, whose
+   supply_regset function is SUPPLY_REGSET, and whose collect_regset
+   function is COLLECT_REGSET.  If the regset has no collect function,
+   pass NULL for COLLECT_REGSET.
+
+   The object returned is allocated using xmalloc.  */
+extern struct regset *regset_xmalloc (void *descr,
+                                      supply_regset_ftype *supply_regset,
+                                      collect_regset_ftype *collect_regset);
+
+
 #endif /* regset.h */
diff --git a/gdb/sparc64fbsd-tdep.c b/gdb/sparc64fbsd-tdep.c
index 6532a5f5df1..7864ffa0cce 100644
--- a/gdb/sparc64fbsd-tdep.c
+++ b/gdb/sparc64fbsd-tdep.c
@@ -199,13 +199,11 @@ sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
-  tdep->gregset = XMALLOC (struct regset);
-  tdep->gregset->descr = &sparc64fbsd_gregset;
-  tdep->gregset->supply_regset = sparc64fbsd_supply_gregset;
+  tdep->gregset
+    = regset_xmalloc (&sparc64fbsd_gregset, sparc64fbsd_supply_gregset, NULL);
   tdep->sizeof_gregset = 256;
 
-  tdep->fpregset = XMALLOC (struct regset);
-  tdep->fpregset->supply_regset = sparc64fbsd_supply_fpregset;
+  tdep->fpregset = regset_xmalloc (NULL, sparc64fbsd_supply_fpregset, NULL);
   tdep->sizeof_fpregset = 272;
 
   frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer);
diff --git a/gdb/sparc64nbsd-tdep.c b/gdb/sparc64nbsd-tdep.c
index 1c30a7a1563..25a0074298c 100644
--- a/gdb/sparc64nbsd-tdep.c
+++ b/gdb/sparc64nbsd-tdep.c
@@ -226,13 +226,11 @@ sparc64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
-  tdep->gregset = XMALLOC (struct regset);
-  tdep->gregset->descr = &sparc64nbsd_gregset;
-  tdep->gregset->supply_regset = sparc64nbsd_supply_gregset;
+  tdep->gregset
+    = regset_xmalloc (&sparc64nbsd_gregset, sparc64nbsd_supply_gregset, NULL);
   tdep->sizeof_gregset = 160;
 
-  tdep->fpregset = XMALLOC (struct regset);
-  tdep->fpregset->supply_regset = sparc64nbsd_supply_fpregset;
+  tdep->fpregset = regset_xmalloc (NULL, sparc64nbsd_supply_fpregset, NULL);
   tdep->sizeof_fpregset = 272;
 
   frame_unwind_append_sniffer (gdbarch, sparc64nbsd_sigtramp_frame_sniffer);
diff --git a/gdb/sparc64obsd-tdep.c b/gdb/sparc64obsd-tdep.c
index fa0ab4dc9bd..b6bd88c1e05 100644
--- a/gdb/sparc64obsd-tdep.c
+++ b/gdb/sparc64obsd-tdep.c
@@ -184,9 +184,9 @@ sparc64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
-  tdep->gregset = XMALLOC (struct regset);
-  tdep->gregset->descr = &sparc64obsd_core_gregset;
-  tdep->gregset->supply_regset = sparc64obsd_supply_gregset;
+  tdep->gregset = regset_xmalloc (&sparc64obsd_core_gregset, 
+                                  sparc64obsd_supply_gregset,
+                                  NULL);
   tdep->sizeof_gregset = 832;
 
   frame_unwind_append_sniffer (gdbarch, sparc64obsd_sigtramp_frame_sniffer);
diff --git a/gdb/sparcnbsd-tdep.c b/gdb/sparcnbsd-tdep.c
index 43a8e9de3d6..ab6003cbb0f 100644
--- a/gdb/sparcnbsd-tdep.c
+++ b/gdb/sparcnbsd-tdep.c
@@ -274,13 +274,11 @@ sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_long_double_bit (gdbarch, 64);
   set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
 
-  tdep->gregset = XMALLOC (struct regset);
-  tdep->gregset->descr = &sparc32nbsd_gregset;
-  tdep->gregset->supply_regset = sparc32nbsd_supply_gregset;
+  tdep->gregset
+    = regset_xmalloc (&sparc32nbsd_gregset, sparc32nbsd_supply_gregset, NULL);
   tdep->sizeof_gregset = 20 * 4;
 
-  tdep->fpregset = XMALLOC (struct regset);
-  tdep->fpregset->supply_regset = sparc32nbsd_supply_fpregset;
+  tdep->fpregset = regset_xmalloc (NULL, sparc32nbsd_supply_fpregset, NULL);
   tdep->sizeof_fpregset = 33 * 4;
 
   frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer);