* target.h (gcc_target): Add asm_out.named_section,

	section_type_flags, have_named_sections.
	* target-def.h (TARGET_ASM_NAMED_SECTION): New.
	(TARGET_HAVE_NAMED_SECTIONS): New.
	(TARGET_SECTION_TYPE_FLAGS): New.

	* Makefile.in (toplev.o): Depend on TARGET_H.
	(varasm.o, dbxout.o): Likewise.
	* c-common.c (decl_attributes): Check targetm.have_named_sections
	instead of ifdef ASM_OUTPUT_SECTION_NAME.
	* dbxout.c (dbxout_function_decl): Likewise.
	(dbxout_function_end): Likewise.
	* toplev.c (compile_file): Likewise.
	* varasm.c (exception_section): Likewise.
	* cp/decl2.c (finish_objects): Likewise.

	* defaults.h (EH_FRAME_SECTION): Remove.
	(EH_FRAME_SECTION_ASM_OP): Remove.
	(EH_FRAME_SECTION_NAME): New.
	(UNIQUE_SECTION): Don't depend on ASM_OUTPUT_SECTION_NAME.
	(UNIQUE_SECTION_P): Remove.
	* dwarf2out.c (SECTION_FORMAT): Remove.
	(ASM_OUTPUT_SECTION): Remove.
	(output_call_frame_info): Use named_section_flags.
	(output_comp_unit, dwarf2out_start_source_file): Likewise.
	(dwarf2out_end_source_file, dwarf2out_define): Likewise.
	(dwarf2out_undef, dwarf2out_init, dwarf2out_finish): Likewise.
	* varasm.c (in_eh_frame, eh_frame_section): Remove.
	(named_section_flags): New.
	(named_section): Use it and targetm.section_type_flags.
	(resolve_unique_section): New.
	(assemble_start_function): Use it.
	(asm_emit_uninitialised, assemble_variable): Likewise.
	(default_section_type_flags): New.
	(default_no_named_section, default_elf_asm_named_section): New.
	(default_coff_asm_named_section, default_pe_asm_named_section): New.
	* output.h: Update varasm.c decls.
	(SECTION_*): New flags.

	* crtstuff.c: Check EH_FRAME_SECTION_NAME not EH_FRAME_SECTION_ASM_OP.
	(__EH_FRAME_BEGIN__, __FRAME_END__): Use attribute section.

	* config/elfos.h (UNIQUE_SECTION_P): Remove.
	* config/alpha/elf.h, config/arm/linux-elf.h: Likewise.
	* config/arm/pe.h, config/arm/unknown-elf.h: Likewise.
	* config/i386/cygwin.h, config/i386/djgpp.h: Likewise.
	* config/i386/i386-interix.h, config/i386/win32.h: Likewise.
	* config/ia64/sysv4.h, config/mcore/mcore-pe.h: Likewise.
	* config/mips/elf.h, config/mips/elf64.h: Likewise.
	* config/mips/iris6gld.h, config/mips/mips.h: Likewise.
	* config/pa/pa64-hpux.h,

	* config/elfos.h (ASM_OUTPUT_SECTION_NAME): Remove.
	(TARGET_ASM_NAMED_SECTION): New.
	* config/psos.h, config/a29k/a29k.h, config/alpha/elf.h: Likewise.
	* config/alpha/vms.h, config/arm/coff.h: Likewise.
	* config/arm/conix-elf.h, config/arm/elf.h: Likewise.
	* config/arm/linux-elf.h, config/arm/pe.h: Likewise.
	* config/arm/unknown-elf.h, config/avr/avr.h: Likewise.
	* config/c4x/c4x.h, config/h8300/h8300.h: Likewise.
	* config/i386/cygwin.h, config/i386/djgpp.h: Likewise.
	* config/i386/i386-interix.h, config/i386/i386elf.h : Likewise.
	* config/i386/sco5.h, config/i386/win32.h: Likewise.
	* config/m68k/coff.h, config/mcore/mcore-pe.h: Likewise.
	* config/mcore/mcore.h, config/mips/elf.h: Likewise.
	* config/mips/elf64.h, config/mips/iris6.h: Likewise.
	* config/mips/netbsd.h, config/mips/openbsd.h: Likewise.
	* config/pa/pa64-hpux.h, config/rs6000/sysv4.h: Likewise.
	* config/rs6000/xcoff.h, config/sh/sh.h: Likewise.
	* config/sparc/sysv4.h: Likewise.

	* config/nextstep.h: Error until named sections implemented.

	* config/a29k/a29k.c (a29k_asm_named_section): New.
	* config/alpha/alpha.c (SECTION_VMS_OVERLAY): New.
	(vms_section_type_flags, vms_asm_named_section): New.
	* config/arm/arm.c (arm_elf_asm_named_section): New.
	* config/avr/avr.c (asm_output_section_name): Remove.
	* config/avr/avr-protos.h: Update.
	* config/c4x/c4x.c (c4x_asm_named_section): New.
	* config/h8300/h8300.c (h8300_asm_named_section): New.
	* config/i386/i386.c (sco_asm_named_section): New.
	* config/i386/winnt.c (SECTION_PE_SHARED): New.
	(i386_pe_section_type_flags): New.
	(i386_pe_asm_named_section): New.
	* config/i386/i386-protos.h: Update.
	* config/m68k/m68k.c (m68k_coff_asm_named_section): New.
	* config/mcore/mcore.c (mcore_asm_named_section): New.
	* config/mips/mips.c (iris6_asm_named_section): New.
	* config/mips/mips.h (ENCODE_SECTION_INFO): Use DECL_ONE_ONLY
	instead of UNIQUE_SECTION_P.
	* config/rs6000/rs6000.c (rs6000_elf_section_type_flags): New.
	(xcoff_asm_named_section): New.
	* config/sh/sh.c (sh_asm_named_section): New.
	* config/sparc/sparc.c (sparc_elf_asm_named_section): New.

	* config/i386/djgpp.h (EH_FRAME_SECTION_ASM_OP): Remove.
	* config/i386/sco5.h (EH_FRAME_SECTION_ASM_OP*): Remove.
	(EH_FRAME_SECTION_NAME): New.
	(EXCEPTION_SECTION): New.
	* config/ia64/ia64.h (EH_FRAME_SECTION_ASM_OP): Remove.
	(DEBUG_*_SECTION): Remove.
	* config/m68k/rtemself.h (EH_FRAME_SECTION_ASM_OP): Remove.
	* config/mips/iris6.h (DEBUG_*_SECTION): Remove.
	(EH_FRAME_SECTION_ASM_OP): Remove.

	* doc/tm.texi (UNIQUE_SECTION_P): Remove.
	(ASM_OUTPUT_SECTION_NAME): Remove.
	(TARGET_ASM_NAMED_SECTION): New.
	(TARGET_HAVE_NAMED_SECTIONS): New.
	(TARGET_SECTION_TYPE_FLAGS): New.
	(EH_FRAME_SECTION_ASM_OP): Remove.
	(EH_FRAME_SECTION_NAME): New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@44623 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 95 insertions, 1 deletions

diff --git a/gcc/config/i386/winnt.c b/gcc/config/i386/winnt.c
index 2d85b66930e..ff13c3863b7 100644
--- a/gcc/config/i386/winnt.c
+++ b/gcc/config/i386/winnt.c
@@ -29,6 +29,7 @@ Boston, MA 02111-1307, USA.  */
 #include "flags.h"
 #include "tm_p.h"
 #include "toplev.h"
+#include "hashtab.h"
 
 /* i386/PE specific attribute support.
 
@@ -55,7 +56,7 @@ void i386_pe_mark_dllimport PARAMS ((tree));
 int
 i386_pe_valid_decl_attribute_p (decl, attributes, attr, args)
      tree decl;
-     tree attributes;
+     tree attributes ATTRIBUTE_UNUSED;
      tree attr;
      tree args;
 {
@@ -455,6 +456,99 @@ i386_pe_unique_section (decl, reloc)
 
   DECL_SECTION_NAME (decl) = build_string (len, string);
 }
+
+/* Select a set of attributes for section NAME based on the properties
+   of DECL and whether or not RELOC indicates that DECL's initializer
+   might contain runtime relocations.
+
+   We make the section read-only and executable for a function decl,
+   read-only for a const data decl, and writable for a non-const data decl.
+
+   If the section has already been defined, to not allow it to have
+   different attributes, as (1) this is ambiguous since we're not seeing
+   all the declarations up front and (2) some assemblers (e.g. SVR4)
+   do not recoginize section redefinitions.  */
+/* ??? This differs from the "standard" PE implementation in that we
+   handle the SHARED variable attribute.  Should this be done for all
+   PE targets?  */
+
+#define SECTION_PE_SHARED	SECTION_MACH_DEP
+
+unsigned int
+i386_pe_section_type_flags (decl, name, reloc)
+     tree decl;
+     const char *name;
+     int reloc;
+{
+  static htab_t htab;
+  unsigned int flags;
+  unsigned int **slot;
+
+  /* The names we put in the hashtable will always be the unique
+     versions gived to us by the stringtable, so we can just use
+     their addresses as the keys.  */
+  if (!htab)
+    htab = htab_create (31, htab_hash_pointer, htab_eq_pointer, NULL);
+
+  if (decl && TREE_CODE (decl) == FUNCTION_DECL)
+    flags = SECTION_CODE;
+  else if (decl && DECL_READONLY_SECTION (decl, reloc))
+    flags = 0;
+  else
+    {
+      flags = SECTION_WRITE;
+
+      if (decl && TREE_CODE (decl) == VAR_DECL
+	  && lookup_attribute ("shared", DECL_MACHINE_ATTRIBUTES (decl)))
+	flags |= SECTION_PE_SHARED;
+    }
+
+  if (decl && DECL_ONE_ONLY (decl))
+    flags |= SECTION_LINKONCE;
+
+  /* See if we already have an entry for this section.  */
+  slot = (unsigned int **) htab_find_slot (htab, name, INSERT);
+  if (!*slot)
+    {
+      *slot = (unsigned int *) xmalloc (sizeof (unsigned int));
+      **slot = flags;
+    }
+  else
+    {
+      if (decl && **slot != flags)
+	error_with_decl (decl, "%s causes a section type conflict");
+    }
+
+  return flags;
+}
+
+void
+i386_pe_asm_named_section (name, flags, align)
+     const char *name;
+     unsigned int flags;
+     unsigned int align ATTRIBUTE_UNUSED;
+{
+  char flagchars[8], *f = flagchars;
+
+  if (flags & SECTION_CODE)
+    *f++ = 'x';
+  if (flags & SECTION_WRITE)
+    *f++ = 'w';
+  if (flags & SECTION_PE_SHARED)
+    *f++ = 's';
+  *f = '\0';
+
+  fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars);
+
+  if (flags & SECTION_LINKONCE)
+    {
+      /* Functions may have been compiled at various levels of
+         optimization so we can't use `same_size' here.
+         Instead, have the linker pick one.  */
+      fprintf (asm_out_file, "\t.linkonce %s\n",
+	       (flags & SECTION_CODE ? "discard" : "same_size"));
+    }
+}
 
 /* The Microsoft linker requires that every function be marked as
    DT_FCN.  When using gas on cygwin, we must emit appropriate .type