#define MAX_OFILE_ALIGNMENT (32768 * 8)
#endif
-#undef ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend.o%s"
-
-#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "%{!shared: \
- %{!symbolic: \
- %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
- crtbegin.o%s"
-
/* Use periods rather than dollar signs in special g++ assembler names. */
#define NO_DOLLAR_IN_LABEL
#define DWARF2_DEBUGGING_INFO 1
#endif
-/* Also allow them to support STABS debugging. */
-
-#include "dbxelf.h"
-
-/* The GNU tools operate better with stabs. Since we don't have
- any native tools to be compatible with, default to stabs. */
+/* The GNU tools operate better with dwarf2, and it is required by some
+ psABI's. Since we don't have any native tools to be compatible with,
+ default to dwarf2. */
#ifndef PREFERRED_DEBUGGING_TYPE
-#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
#endif
/* All SVR4 targets use the ELF object file format. */
#define IDENT_ASM_OP "\t.ident\t"
-#undef ASM_BYTE_OP
-#define ASM_BYTE_OP "\t.byte\t"
-
#undef SET_ASM_OP
#define SET_ASM_OP "\t.set\t"
with a period is not put into the linker symbol table by the assembler. */
#undef ASM_OUTPUT_INTERNAL_LABEL
-#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
- do \
- { \
- fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
- } \
+#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
+ do \
+ { \
+ fprintf (FILE, ".%s%u:\n", PREFIX, (unsigned) (NUM)); \
+ } \
while (0)
/* This is how to store into the string LABEL
make sure that the location counter for the .rodata section gets pro-
perly re-aligned prior to the actual beginning of the jump table. */
+#undef ALIGN_ASM_OP
#define ALIGN_ASM_OP "\t.align\t"
#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
} \
while (0)
-/* This is the pseudo-op used to generate a reference to a specific
- symbol in some section. It is only used in machine-specific
- configuration files, typically only in ASM_OUTPUT_CONSTRUCTOR and
- ASM_OUTPUT_DESTRUCTOR. This is the same for all known svr4
- assemblers, except those in targets that don't use 32-bit pointers.
- Those should override INT_ASM_OP. Yes, the name of the macro is
- misleading. */
-
-#ifndef INT_ASM_OP
-#define INT_ASM_OP "\t.long\t"
-#endif
-
/* This is the pseudo-op used to generate a contiguous sequence of byte
values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
#define CONST_SECTION_ASM_OP "\t.section\t.rodata"
-/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
-
- Note that we want to give these sections the SHF_WRITE attribute
- because these sections will actually contain data (i.e. tables of
- addresses of functions in the current root executable or shared library
- file) and, in the case of a shared library, the relocatable addresses
- will have to be properly resolved/relocated (and then written into) by
- the dynamic linker when it actually attaches the given shared library
- to the executing process. (Note that on SVR4, you may wish to use the
- `-z text' option to the ELF linker, when building a shared library, as
- an additional check that you are doing everything right. But if you do
- use the `-z text' option when building a shared library, you will get
- errors unless the .ctors and .dtors sections are marked as writable
- via the SHF_WRITE attribute.) */
-
-#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"aw\""
-#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"aw\""
-
/* On svr4, we *do* have support for the .init and .fini sections, and we
can put stuff in there to be executed before and after `main'. We let
crtstuff.c and other files know this by defining the following symbols.
#define INIT_SECTION_ASM_OP "\t.section\t.init"
#define FINI_SECTION_ASM_OP "\t.section\t.fini"
+#ifdef HAVE_GAS_SUBSECTION_ORDERING
+
+#define ASM_SECTION_START_OP "\t.subsection\t-1"
+
+/* Output assembly directive to move to the beginning of current section. */
+#define ASM_OUTPUT_SECTION_START(FILE) \
+ fprintf ((FILE), "%s\n", ASM_SECTION_START_OP)
+
+#endif
+
/* A default list of other sections which we might be "in" at any given
time. For targets that use additional sections (e.g. .tdesc) you
should override this definition in the target-specific file which
includes this file. */
#undef EXTRA_SECTIONS
-#define EXTRA_SECTIONS in_const, in_ctors, in_dtors
+#define EXTRA_SECTIONS in_const
/* A default list of extra section function definitions. For targets
that use additional sections (e.g. .tdesc) you should override this
#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS \
- CONST_SECTION_FUNCTION \
- CTORS_SECTION_FUNCTION \
- DTORS_SECTION_FUNCTION
+ CONST_SECTION_FUNCTION
#define READONLY_DATA_SECTION() const_section ()
} \
}
-#define CTORS_SECTION_FUNCTION \
-void \
-ctors_section () \
-{ \
- if (in_section != in_ctors) \
- { \
- fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
- in_section = in_ctors; \
- } \
-}
-
-#define DTORS_SECTION_FUNCTION \
-void \
-dtors_section () \
-{ \
- if (in_section != in_dtors) \
- { \
- fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
- in_section = in_dtors; \
- } \
-}
-
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
-#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
-
#define UNIQUE_SECTION(DECL, RELOC) \
do \
{ \
const char *name; \
char *string; \
const char *prefix; \
- static const char *prefixes[4][2] = \
+ static const char *const prefixes[4][2] = \
{ \
{ ".text.", ".gnu.linkonce.t." }, \
{ ".rodata.", ".gnu.linkonce.r." }, \
} \
while (0)
-/* A C statement (sans semicolon) to output an
- element in the table of global constructors. */
-#define ASM_OUTPUT_CONSTRUCTOR(FILE, NAME) \
- do \
- { \
- ctors_section (); \
- fprintf (FILE, "%s", INT_ASM_OP); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, "\n"); \
- } \
- while (0)
-
-/* A C statement (sans semicolon) to output an
- element in the table of global destructors. */
-#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
- do \
- { \
- dtors_section (); \
- fprintf (FILE, "%s", INT_ASM_OP); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, "\n"); \
- } \
- while (0)
-
-/* Switch into a generic section.
-
- 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, we must not
- emit the attributes here. The SVR4 assembler does not
- recognize section redefinitions.
- If DECL is NULL, no attributes are emitted. */
-
-#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
- do \
- { \
- static htab_t htab; \
- \
- struct section_info \
- { \
- enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
- }; \
- \
- struct section_info *s; \
- const char *mode; \
- enum sect_enum type; \
- PTR* 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) \
- type = SECT_EXEC, mode = "ax"; \
- else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
- type = SECT_RO, mode = "a"; \
- else \
- type = SECT_RW, mode = "aw"; \
- \
- \
- /* See if we already have an entry for this section. */ \
- slot = htab_find_slot (htab, NAME, INSERT); \
- if (!*slot) \
- { \
- s = (struct section_info *) xmalloc (sizeof (* s)); \
- s->type = type; \
- *slot = s; \
- fprintf (FILE, "\t.section\t%s,\"%s\",@progbits\n", \
- NAME, mode); \
- } \
- else \
- { \
- s = (struct section_info *) *slot; \
- if (DECL && s->type != type) \
- error_with_decl (DECL, \
- "%s causes a section type conflict"); \
- \
- fprintf (FILE, "\t.section\t%s\n", NAME); \
- } \
- } \
- while (0)
+/* Switch into a generic section. */
+#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
/* A C statement or statements to switch to the appropriate
section for output of RTX in mode MODE. RTX is some kind
of constant in RTL. The argument MODE is redundant except
- in the case of a `const_int' rtx. Currently, these always
- go into the const section. */
+ in the case of a `const_int' rtx.
+ If assembler supports SHF_MERGE sections, put it into
+ a .rodata.cstN section where N is size of the constant,
+ otherwise into const section. */
#undef SELECT_RTX_SECTION
-#define SELECT_RTX_SECTION(MODE, RTX) const_section ()
+#define SELECT_RTX_SECTION(MODE, RTX, ALIGN) \
+ mergeable_constant_section ((MODE), (ALIGN), 0)
/* A C statement or statements to switch to the appropriate
section for output of DECL. DECL is either a `VAR_DECL' node
or a constant of some sort. RELOC indicates whether forming
- the initial value of DECL requires link-time relocations. */
+ the initial value of DECL requires link-time relocations.
+
+ To optimize loading of shared programs, define following subsections
+ of data section by attaching:
+
+ .rel
+ Section with this string in name contains data that do have
+ relocations, so they get grouped together and dynamic linker
+ will visit fewer pages in memory.
+ .ro
+ Marks data read only otherwise. This is useful with prelinking
+ as most of relocations won't be dynamically linked and thus
+ stay read only.
+ .local
+ Marks data containing relocations only to local objects. These
+ relocation will get fully resolved by prelinking.
+ */
#undef SELECT_SECTION
-#define SELECT_SECTION(DECL, RELOC) \
+#define SELECT_SECTION(DECL, RELOC, ALIGN) \
{ \
if (TREE_CODE (DECL) == STRING_CST) \
{ \
if (! flag_writable_strings) \
- const_section (); \
+ mergeable_string_section ((DECL), (ALIGN), 0); \
else \
data_section (); \
} \
else if (TREE_CODE (DECL) == VAR_DECL) \
{ \
- if ((flag_pic && RELOC) \
- || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
+ if (!TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
|| !DECL_INITIAL (DECL) \
|| (DECL_INITIAL (DECL) != error_mark_node \
&& !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
- data_section (); \
- else \
+ { \
+ if (flag_pic && ((RELOC) & 2)) \
+ named_section (NULL_TREE, ".data.rel", RELOC); \
+ else if (flag_pic && (RELOC)) \
+ named_section (NULL_TREE, ".data.rel.local", RELOC);\
+ else \
+ data_section (); \
+ } \
+ else if (flag_pic && ((RELOC) & 2)) \
+ named_section (NULL_TREE, ".data.rel.ro", RELOC); \
+ else if (flag_pic && (RELOC)) \
+ named_section (NULL_TREE, ".data.rel.ro.local", RELOC); \
+ else if (flag_merge_constants < 2) \
+ /* C and C++ don't allow different variables to share \
+ the same location. -fmerge-all-constants allows \
+ even that (at the expense of not conforming). */ \
const_section (); \
+ else if (TREE_CODE (DECL_INITIAL (DECL)) == STRING_CST) \
+ mergeable_string_section (DECL_INITIAL (DECL), (ALIGN), \
+ 0); \
+ else \
+ mergeable_constant_section (DECL_MODE (DECL), (ALIGN), \
+ 0); \
} \
else if (TREE_CODE (DECL) == CONSTRUCTOR) \
{ \
if ((flag_pic && RELOC) \
- || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
+ || TREE_SIDE_EFFECTS (DECL) \
|| ! TREE_CONSTANT (DECL)) \
data_section (); \
else \
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