/* General Solaris system support.
- Copyright (C) 2004, 2005 , 2007, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005 , 2007, 2010, 2011 Free Software Foundation, Inc.
Contributed by CodeSourcery, LLC.
This file is part of GCC.
#include "output.h"
#include "tm.h"
#include "rtl.h"
+#include "target.h"
#include "tm_p.h"
-#include "toplev.h"
+#include "diagnostic-core.h"
#include "ggc.h"
+#include "hashtab.h"
tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis;
{
if (lookup_attribute ("init", DECL_ATTRIBUTES (decl)))
{
- fprintf (file, "\t.pushsection\t\".init\"\n");
+ fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".init");
ASM_OUTPUT_CALL (file, decl);
fprintf (file, "\t.popsection\n");
}
if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl)))
{
- fprintf (file, "\t.pushsection\t\".fini\"\n");
+ fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".fini");
ASM_OUTPUT_CALL (file, decl);
fprintf (file, "\t.popsection\n");
}
the visibility type VIS, which must not be VISIBILITY_DEFAULT. */
void
-solaris_assemble_visibility (tree decl, int vis)
+solaris_assemble_visibility (tree decl ATTRIBUTE_UNUSED,
+ int vis ATTRIBUTE_UNUSED)
{
+#ifdef HAVE_GAS_HIDDEN
/* Sun as uses .symbolic for STV_PROTECTED. STV_INTERNAL is marked as
`currently reserved', but the linker treats it like STV_HIDDEN. Sun
Studio 12.1 cc emits .hidden instead.
STV_SINGLETON, and STV_ELIMINATE.
See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining
- Additional Symbols with a mapfile,
- http://docs.sun.com/app/docs/doc/819-0690/gdzmc?a=view
- and Ch. 7, Object-File Format, Symbol Table Section,
- http://docs.sun.com/app/docs/doc/819-0690/chapter6-79797?a=view */
+ Additional Symbols, and Ch. 7, Object-File Format, Symbol Table
+ Section. */
static const char * const visibility_types[] = {
NULL, "symbolic", "hidden", "hidden"
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
type = visibility_types[vis];
- /* .hidden dates back before Solaris 2.5, but .symbolic was only added in
- Solaris 9 12/02. */
-#ifdef HAVE_GAS_HIDDEN
fprintf (asm_out_file, "\t.%s\t", type);
assemble_name (asm_out_file, name);
fprintf (asm_out_file, "\n");
"in this configuration; ignored");
#endif
}
+
+/* Hash table of group signature symbols. */
+
+static htab_t solaris_comdat_htab;
+
+/* Group section information entry stored in solaris_comdat_htab. */
+
+typedef struct comdat_entry
+{
+ const char *name;
+ unsigned int flags;
+ tree decl;
+ const char *sig;
+} comdat_entry;
+
+/* Helper routines for maintaining solaris_comdat_htab. */
+
+static hashval_t
+comdat_hash (const void *p)
+{
+ const comdat_entry *entry = (const comdat_entry *) p;
+
+ return htab_hash_string (entry->sig);
+}
+
+static int
+comdat_eq (const void *p1, const void *p2)
+{
+ const comdat_entry *entry1 = (const comdat_entry *) p1;
+ const comdat_entry *entry2 = (const comdat_entry *) p2;
+
+ return strcmp (entry1->sig, entry2->sig) == 0;
+}
+
+/* Output assembly to switch to COMDAT group section NAME with attributes
+ FLAGS and group signature symbol DECL, using Sun as syntax. */
+
+void
+solaris_elf_asm_comdat_section (const char *name, unsigned int flags, tree decl)
+{
+ const char *signature;
+ char *section;
+ comdat_entry entry, **slot;
+
+ if (TREE_CODE (decl) == IDENTIFIER_NODE)
+ signature = IDENTIFIER_POINTER (decl);
+ else
+ signature = IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl));
+
+ /* Sun as requires group sections to be fragmented, i.e. to have names of
+ the form <section>%<fragment>. Strictly speaking this is only
+ necessary to support cc -xF, but is enforced globally in violation of
+ the ELF gABI. We keep the section names generated by GCC (generally
+ of the form .text.<signature>) and append %<signature> to pacify as,
+ despite the redundancy. */
+ section = concat (name, "%", signature, NULL);
+
+ /* Clear SECTION_LINKONCE flag so targetm.asm_out.named_section only
+ emits this as a regular section. Emit section before .group
+ directive since Sun as treats undeclared sections as @progbits,
+ which conflicts with .bss* sections which are @nobits. */
+ targetm.asm_out.named_section (section, flags & ~SECTION_LINKONCE, decl);
+
+ /* Sun as separates declaration of a group section and of the group
+ itself, using the .group directive and the #comdat flag. */
+ fprintf (asm_out_file, "\t.group\t%s," SECTION_NAME_FORMAT ",#comdat\n",
+ signature, section);
+
+ /* Unlike GNU as, group signature symbols need to be defined explicitly
+ for Sun as. With a few exceptions, this is already the case. To
+ identify the missing ones without changing the affected frontents,
+ remember the signature symbols and emit those not marked
+ TREE_SYMBOL_REFERENCED in solaris_file_end. */
+ if (solaris_comdat_htab == NULL)
+ solaris_comdat_htab = htab_create_alloc (37, comdat_hash, comdat_eq, NULL,
+ xcalloc, free);
+
+ entry.sig = signature;
+ slot = (comdat_entry **) htab_find_slot (solaris_comdat_htab, &entry, INSERT);
+
+ if (*slot == NULL)
+ {
+ *slot = XCNEW (comdat_entry);
+ /* Remember fragmented section name. */
+ (*slot)->name = section;
+ /* Emit as regular section, .group declaration has already been done. */
+ (*slot)->flags = flags & ~SECTION_LINKONCE;
+ (*slot)->decl = decl;
+ (*slot)->sig = signature;
+ }
+}
+
+/* Define unreferenced COMDAT group signature symbol corresponding to SLOT. */
+
+static int
+solaris_define_comdat_signature (void **slot, void *aux ATTRIBUTE_UNUSED)
+{
+ comdat_entry *entry = *(comdat_entry **) slot;
+ tree decl = entry->decl;
+
+ if (TREE_CODE (decl) != IDENTIFIER_NODE)
+ decl = DECL_COMDAT_GROUP (decl);
+
+ if (!TREE_SYMBOL_REFERENCED (decl))
+ {
+ /* Switch to group section, otherwise Sun as complains
+ `Group Id symbol defined outside of group'. */
+ switch_to_section (get_section (entry->name, entry->flags, entry->decl));
+
+ ASM_OUTPUT_LABEL (asm_out_file, entry->sig);
+ }
+
+ /* Continue with scan. */
+ return 1;
+}
+
+/* Emit unreferenced COMDAT group signature symbols for Sun as. */
+
+void
+solaris_file_end (void)
+{
+ if (solaris_comdat_htab == NULL)
+ return;
+
+ htab_traverse (solaris_comdat_htab, solaris_define_comdat_signature, NULL);
+}
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