diff --git a/gdb/hppa-hpux-tdep.c b/gdb/hppa-hpux-tdep.c
index 688ac9a..ee59811 100644
--- a/gdb/hppa-hpux-tdep.c
+++ b/gdb/hppa-hpux-tdep.c
@@ -1371,15 +1371,14 @@ static const struct regset hppa_hpux_regset =
   hppa_hpux_supply_save_state
 };
 
-static const struct regset *
-hppa_hpux_regset_from_core_section (struct gdbarch *gdbarch,
-				    const char *sect_name, size_t sect_size)
+static void
+hppa_hpux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+					iterate_over_regset_sections_cb *cb,
+					void *cb_data,
+					const struct regcache *regcache)
 {
-  if (strcmp (sect_name, ".reg") == 0
-      && sect_size >= HPPA_HPUX_PA89_SAVE_STATE_SIZE + 8)
-    return &hppa_hpux_regset;
-
-  return NULL;
+  cb (".reg", HPPA_HPUX_PA89_SAVE_STATE_SIZE + 8, &hppa_hpux_regset,
+      NULL, cb_data);
 }
 
 
@@ -1495,8 +1494,8 @@ hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_skip_permanent_breakpoint
     (gdbarch, hppa_skip_permanent_breakpoint);
 
-  set_gdbarch_regset_from_core_section
-    (gdbarch, hppa_hpux_regset_from_core_section);
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, hppa_hpux_iterate_over_regset_sections);
 
   frame_unwind_append_unwinder (gdbarch, &hppa_hpux_sigtramp_frame_unwind);
 }
diff --git a/gdb/hppa-linux-tdep.c b/gdb/hppa-linux-tdep.c
index 6bc604b..52837ee 100644
--- a/gdb/hppa-linux-tdep.c
+++ b/gdb/hppa-linux-tdep.c
@@ -472,17 +472,17 @@ static const struct regset hppa_linux_fpregset =
   regcache_supply_regset, regcache_collect_regset
 };
 
-static const struct regset *
-hppa_linux_regset_from_core_section (struct gdbarch *gdbarch,
-				     const char *sect_name,
-				     size_t sect_size)
+static void
+hppa_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+					 iterate_over_regset_sections_cb *cb,
+					 void *cb_data,
+					 const struct regcache *regcache)
 {
-  if (strcmp (sect_name, ".reg") == 0)
-    return &hppa_linux_regset;
-  else if (strcmp (sect_name, ".reg2") == 0)
-    return &hppa_linux_fpregset;
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
-  return NULL;
+  cb (".reg", 80 * tdep->bytes_per_address, &hppa_linux_regset,
+      NULL, cb_data);
+  cb (".reg2", 64 * 4, &hppa_linux_fpregset, NULL, cb_data);
 }
 
 
@@ -520,8 +520,8 @@ hppa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
      more work in gcc and glibc first.  */
   set_gdbarch_long_double_bit (gdbarch, 64);
 
-  set_gdbarch_regset_from_core_section
-    (gdbarch, hppa_linux_regset_from_core_section);
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, hppa_linux_iterate_over_regset_sections);
 
   set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
 
diff --git a/gdb/hppanbsd-tdep.c b/gdb/hppanbsd-tdep.c
index b3f04c7..4587466 100644
--- a/gdb/hppanbsd-tdep.c
+++ b/gdb/hppanbsd-tdep.c
@@ -184,17 +184,15 @@ static const struct regset hppanbsd_gregset =
   hppanbsd_supply_gregset
 };
 
-/* Return the appropriate register set for the core section identified
-   by SECT_NAME and SECT_SIZE.  */
+/* Iterate over supported core file register note sections. */
 
-static const struct regset *
-hppanbsd_regset_from_core_section (struct gdbarch *gdbarch,
-				  const char *sect_name, size_t sect_size)
+static void
+hppanbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+				       iterate_over_regset_sections_cb *cb,
+				       void *cb_data,
+				       const struct regcache *regcache)
 {
-  if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPANBSD_SIZEOF_GREGS)
-    return &hppanbsd_gregset;
-
-  return NULL;
+  cb (".reg", HPPANBSD_SIZEOF_GREGS, &hppanbsd_gregset, NULL, cb_data);
 }
 
 static void
@@ -204,8 +202,8 @@ hppanbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   hppabsd_init_abi (info, gdbarch);
 
   /* Core file support.  */
-  set_gdbarch_regset_from_core_section
-    (gdbarch, hppanbsd_regset_from_core_section);
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, hppanbsd_iterate_over_regset_sections);
 
   tramp_frame_prepend_unwinder (gdbarch, &hppanbsd_sigtramp_si4);
 }
diff --git a/gdb/hppaobsd-tdep.c b/gdb/hppaobsd-tdep.c
index c521359..3d2f217 100644
--- a/gdb/hppaobsd-tdep.c
+++ b/gdb/hppaobsd-tdep.c
@@ -140,20 +140,16 @@ static const struct regset hppaobsd_fpregset =
   hppaobsd_supply_fpregset
 };
 
-/* Return the appropriate register set for the core section identified
-   by SECT_NAME and SECT_SIZE.  */
+/* Iterate over supported core file register note sections. */
 
-static const struct regset *
-hppaobsd_regset_from_core_section (struct gdbarch *gdbarch,
-				  const char *sect_name, size_t sect_size)
+static void
+hppaobsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+				       iterate_over_regset_sections_cb *cb,
+				       void *cb_data,
+				       const struct regcache *regcache)
 {
-  if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPAOBSD_SIZEOF_GREGS)
-    return &hppaobsd_gregset;
-
-  if (strcmp (sect_name, ".reg2") == 0 && sect_size >= HPPAOBSD_SIZEOF_FPREGS)
-    return &hppaobsd_fpregset;
-
-  return NULL;
+  cb (".reg", HPPAOBSD_SIZEOF_GREGS, &hppaobsd_gregset, NULL, cb_data);
+  cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, &hppaobsd_fpregset, NULL, cb_data);
 }
 
 
@@ -164,8 +160,8 @@ hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   hppabsd_init_abi (info, gdbarch);
 
   /* Core file support.  */
-  set_gdbarch_regset_from_core_section
-    (gdbarch, hppaobsd_regset_from_core_section);
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, hppaobsd_iterate_over_regset_sections);
 }
 
 
