target-def.h (TARGET_HAVE_SRODATA_SECTION): New macro.

        * target-def.h (TARGET_HAVE_SRODATA_SECTION): New macro.
        * target.h (gcc_target): Add have_srodata_section member.
        * varasm.c (section_category): Add SECCAT_SRODATA.
        (categorize_decl_for_section): Return SECCAT_SRODATA for sdata if
        READONLY_SDATA_SECTION defined.
        (decl_readonly_section_1): True for SECCAT_SRODATA also.
        (default_elf_select_section_1): Map SECCAT_SRODATA to .sdata2.
        (default_unique_section_1): Likewise.

From-SVN: r56806

gcc/ChangeLog

+2002-09-04  David Edelsohn  <edelsohn@gnu.org>
+
+	* target-def.h (TARGET_HAVE_SRODATA_SECTION): New macro.
+	* target.h (gcc_target): Add have_srodata_section member.
+	* varasm.c (section_category): Add SECCAT_SRODATA.
+	(categorize_decl_for_section): Return SECCAT_SRODATA for sdata if
+	READONLY_SDATA_SECTION defined.
+	(decl_readonly_section_1): True for SECCAT_SRODATA also.
+	(default_elf_select_section_1): Map SECCAT_SRODATA to .sdata2.
+	(default_unique_section_1): Likewise.
+
 2002-09-04  John David Anglin  <dave@hiauly1.hia.nrc.ca>
 
 	* expr.c (emit_group_load): Revise to allow splitting TCmode source

gcc/target-def.h

@@ -118,6 +118,10 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 #define TARGET_HAVE_TLS false
 #endif
 
+#ifndef TARGET_HAVE_SRODATA_SECTION
+#define TARGET_HAVE_SRODATA_SECTION false
+#endif
+
 #ifndef TARGET_ASM_EXCEPTION_SECTION
 #define TARGET_ASM_EXCEPTION_SECTION default_exception_section
 #endif
@@ -224,7 +228,10 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 /* In hook.c.  */
 #define TARGET_CANNOT_MODIFY_JUMPS_P hook_void_bool_false
+
+#ifndef TARGET_IN_SMALL_DATA_P
 #define TARGET_IN_SMALL_DATA_P hook_tree_bool_false
+#endif
 
 #ifndef TARGET_ENCODE_SECTION_INFO
 #define TARGET_ENCODE_SECTION_INFO hook_tree_int_void
@@ -253,7 +260,8 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   TARGET_STRIP_NAME_ENCODING,			\
   TARGET_HAVE_NAMED_SECTIONS,			\
   TARGET_HAVE_CTORS_DTORS,			\
-  TARGET_HAVE_TLS				\
+  TARGET_HAVE_TLS,				\
+  TARGET_HAVE_SRODATA_SECTION			\
 }
 
 #include "hooks.h"

gcc/target.h

@@ -262,6 +262,9 @@ struct gcc_target
 
   /* True if thread-local storage is supported.  */
   bool have_tls;
+
+  /* True if a small readonly data section is supported.  */
+  bool have_srodata_section;
 };
 
 extern struct gcc_target targetm;

gcc/varasm.c

@@ -4898,6 +4898,7 @@ enum section_category
   SECCAT_RODATA_MERGE_STR,
   SECCAT_RODATA_MERGE_STR_INIT,
   SECCAT_RODATA_MERGE_CONST,
+  SECCAT_SRODATA,
 
   SECCAT_DATA,
 
@@ -4999,6 +5000,8 @@ categorize_decl_for_section (decl, reloc, shlib)
     {
       if (ret == SECCAT_BSS)
 	ret = SECCAT_SBSS;
+      else if (targetm.have_srodata_section && ret == SECCAT_RODATA)
+	ret = SECCAT_SRODATA;
       else
 	ret = SECCAT_SDATA;
     }
@@ -5026,6 +5029,7 @@ decl_readonly_section_1 (decl, reloc, shlib)
     case SECCAT_RODATA_MERGE_STR:
     case SECCAT_RODATA_MERGE_STR_INIT:
     case SECCAT_RODATA_MERGE_CONST:
+    case SECCAT_SRODATA:
       return true;
       break;
     default:
@@ -5069,6 +5073,9 @@ default_elf_select_section_1 (decl, reloc, align, shlib)
     case SECCAT_RODATA_MERGE_CONST:
       mergeable_constant_section (DECL_MODE (decl), align, 0);
       break;
+    case SECCAT_SRODATA:
+      named_section (NULL_TREE, ".sdata2", reloc);
+      break;
     case SECCAT_DATA:
       data_section ();
       break;
@@ -5141,6 +5148,9 @@ default_unique_section_1 (decl, reloc, shlib)
     case SECCAT_RODATA_MERGE_CONST:
       prefix = one_only ? ".gnu.linkonce.r." : ".rodata.";
       break;
+    case SECCAT_SRODATA:
+      prefix = one_only ? ".gnu.linkonce.s2." : ".sdata2.";
+      break;
     case SECCAT_DATA:
     case SECCAT_DATA_REL:
     case SECCAT_DATA_REL_LOCAL: