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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [config/] [sol2.c] - Rev 848
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/* General Solaris system support. Copyright (C) 2004, 2005 , 2007, 2010, 2011 Free Software Foundation, Inc. Contributed by CodeSourcery, LLC. This file is part of GCC. GCC 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 3, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tree.h" #include "output.h" #include "tm.h" #include "rtl.h" #include "target.h" #include "tm_p.h" #include "diagnostic-core.h" #include "ggc.h" #include "hashtab.h" tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis; /* Attach any pending attributes for DECL to the list in *ATTRIBUTES. Pending attributes come from #pragma or _Pragma, so this code is only useful in the C family front ends, but it is included in all languages to avoid changing the target machine initializer depending on the language. */ void solaris_insert_attributes (tree decl, tree *attributes) { tree *x, next; if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL) for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x)) { tree name = TREE_PURPOSE (*x); tree value = TREE_VALUE (*x); if (DECL_NAME (decl) == name) { if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl)) || lookup_attribute ("aligned", *attributes)) warning (0, "ignoring %<#pragma align%> for explicitly " "aligned %q+D", decl); else *attributes = tree_cons (get_identifier ("aligned"), value, *attributes); next = TREE_CHAIN (*x); ggc_free (*x); *x = next; break; } } if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL) for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x)) { tree name = TREE_PURPOSE (*x); if (DECL_NAME (decl) == name) { *attributes = tree_cons (get_identifier ("init"), NULL, *attributes); TREE_USED (decl) = 1; DECL_PRESERVE_P (decl) = 1; next = TREE_CHAIN (*x); ggc_free (*x); *x = next; break; } } if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL) for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x)) { tree name = TREE_PURPOSE (*x); if (DECL_NAME (decl) == name) { *attributes = tree_cons (get_identifier ("fini"), NULL, *attributes); TREE_USED (decl) = 1; DECL_PRESERVE_P (decl) = 1; next = TREE_CHAIN (*x); ggc_free (*x); *x = next; break; } } } /* Output initializer or finalizer entries for DECL to FILE. */ void solaris_output_init_fini (FILE *file, tree decl) { if (lookup_attribute ("init", DECL_ATTRIBUTES (decl))) { 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" SECTION_NAME_FORMAT "\n", ".fini"); ASM_OUTPUT_CALL (file, decl); fprintf (file, "\t.popsection\n"); } } /* Emit an assembler directive to set symbol for DECL visibility to the visibility type VIS, which must not be VISIBILITY_DEFAULT. */ void 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. There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED, STV_SINGLETON, and STV_ELIMINATE. See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining Additional Symbols, and Ch. 7, Object-File Format, Symbol Table Section. */ static const char * const visibility_types[] = { NULL, "symbolic", "hidden", "hidden" }; const char *name, *type; name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); type = visibility_types[vis]; fprintf (asm_out_file, "\t.%s\t", type); assemble_name (asm_out_file, name); fprintf (asm_out_file, "\n"); #else warning (OPT_Wattributes, "visibility attribute not supported " "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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