-/* Definitions of target machine for GNU compiler. MIPS R3000 version with
- GOFAST floating point library.
- Copyright (C) 1994, 1997, 1999 Free Software Foundation, Inc.
+/* Target macros for mips*-elf targets.
+ Copyright (C) 1994, 1997, 1999, 2000, 2002, 2003, 2004, 2007
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+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 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* Use ELF. */
-#define OBJECT_FORMAT_ELF
-
-/* Until we figure out what MIPS ELF targets normally use, just do
- stabs in ELF. */
-#ifndef PREFERRED_DEBUGGING_TYPE
-#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
-#endif
-
-/* Mostly like ECOFF. */
-#include "gofast.h"
-#include "mips/ecoff.h"
-
-/* We need to use .esize and .etype instead of .size and .type to
- avoid conflicting with ELF directives. */
-#undef PUT_SDB_SIZE
-#define PUT_SDB_SIZE(a) \
-do { \
- extern FILE *asm_out_text_file; \
- fprintf (asm_out_text_file, "\t.esize\t%d;", (a)); \
-} while (0)
-
-#undef PUT_SDB_TYPE
-#define PUT_SDB_TYPE(a) \
-do { \
- extern FILE *asm_out_text_file; \
- fprintf (asm_out_text_file, "\t.etype\t0x%x;", (a)); \
-} while (0)
-
-/* Biggest alignment supported by the object file format of this
- machine. Use this macro to limit the alignment which can be
- specified using the `__attribute__ ((aligned (N)))' construct. If
- not defined, the default value is `BIGGEST_ALIGNMENT'. */
-
-#define MAX_OFILE_ALIGNMENT (32768*8)
-
-/* A C statement to output something to the assembler file to switch to section
- NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
- NULL_TREE. Some target formats do not support arbitrary sections. Do not
- define this macro in such cases. */
-
-#define ASM_OUTPUT_SECTION_NAME(F, DECL, NAME, RELOC) \
-do { \
- extern FILE *asm_out_text_file; \
- if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
- fprintf (asm_out_text_file, "\t.section %s,\"ax\",@progbits\n", (NAME)); \
- else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
- fprintf (F, "\t.section %s,\"a\",@progbits\n", (NAME)); \
- else \
- fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME)); \
-} while (0)
-
-/* The following macro defines the format used to output the second
- operand of the .type assembler directive. Different svr4 assemblers
- expect various different forms for this operand. The one given here
- is just a default. You may need to override it in your machine-
- specific tm.h file (depending upon the particulars of your assembler). */
-
-#define TYPE_OPERAND_FMT "@%s"
-
-/* Define the strings used for the special svr4 .type and .size directives.
- These strings generally do not vary from one system running svr4 to
- another, but if a given system (e.g. m88k running svr) needs to use
- different pseudo-op names for these, they may be overridden in the
- file which includes this one. */
-
-#undef TYPE_ASM_OP
-#undef SIZE_ASM_OP
-#define TYPE_ASM_OP ".type"
-#define SIZE_ASM_OP ".size"
-
-/* If defined, a C expression whose value is a string containing the
- assembler operation to identify the following data as
- uninitialized global data. If not defined, and neither
- `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
- uninitialized global data will be output in the data section if
- `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
- used. */
-#ifndef BSS_SECTION_ASM_OP
-#define BSS_SECTION_ASM_OP ".section\t.bss"
-#endif
-
-#define SBSS_SECTION_ASM_OP "\t.section .sbss"
-
-/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
- separate, explicit argument. If you define this macro, it is used
- in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
- handling the required alignment of the variable. The alignment is
- specified as the number of bits.
-
- Try to use function `asm_output_aligned_bss' defined in file
- `varasm.c' when defining this macro. */
-#ifndef ASM_OUTPUT_ALIGNED_BSS
-#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
-do { \
- ASM_GLOBALIZE_LABEL (FILE, NAME); \
- if (SIZE > 0 && SIZE <= mips_section_threshold) \
- sbss_section (); \
- else \
- bss_section (); \
- ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \
- last_assemble_variable_decl = DECL; \
- ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \
- ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1); \
-} while (0)
-#endif
-
-/* These macros generate the special .type and .size directives which
- are used to set the corresponding fields of the linker symbol table
- entries in an ELF object file under SVR4. These macros also output
- the starting labels for the relevant functions/objects. */
-
-/* Write the extra assembler code needed to declare an object properly. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+/* MIPS assemblers don't have the usual .set foo,bar construct;
+ .set is used for assembler options instead. */
+#undef SET_ASM_OP
+#define ASM_OUTPUT_DEF(FILE, LABEL1, LABEL2) \
+ do \
+ { \
+ fputc ('\t', FILE); \
+ assemble_name (FILE, LABEL1); \
+ fputs (" = ", FILE); \
+ assemble_name (FILE, LABEL2); \
+ fputc ('\n', FILE); \
+ } \
+ while (0)
#undef ASM_DECLARE_OBJECT_NAME
-#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
- do { \
- fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
- assemble_name (FILE, NAME); \
- putc (',', FILE); \
- fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
- putc ('\n', FILE); \
- size_directive_output = 0; \
- if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
- { \
- size_directive_output = 1; \
- fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
- } \
- mips_declare_object (FILE, NAME, "", ":\n", 0); \
- } while (0)
-
-/* Output the size directive for a decl in rest_of_decl_compilation
- in the case where we did not do so before the initializer.
- Once we find the error_mark_node, we know that the value of
- size_directive_output was set
- by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
+#define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
#undef ASM_FINISH_DECLARE_OBJECT
-#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
-do { \
- char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
- if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
- && ! AT_END && TOP_LEVEL \
- && DECL_INITIAL (DECL) == error_mark_node \
- && !size_directive_output) \
- { \
- size_directive_output = 1; \
- fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
- assemble_name (FILE, name); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
- } \
- } while (0)
-
-#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
- do { fputc ( '\t', FILE); \
- assemble_name (FILE, LABEL1); \
- fputs ( " = ", FILE); \
- assemble_name (FILE, LABEL2); \
- fputc ( '\n', FILE); \
- } while (0)
-
-/* Note about .weak vs. .weakext
- The mips native assemblers support .weakext, but not .weak.
- mips-elf gas supports .weak, but not .weakext.
- mips-elf gas has been changed to support both .weak and .weakext,
- but until that support is generally available, the 'if' below
- should serve. */
-
-#define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)
-#define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE) \
- do { \
- if (TARGET_GAS) \
- fputs ("\t.weak\t", FILE); \
- else \
- fputs ("\t.weakext\t", FILE); \
- assemble_name (FILE, NAME); \
- if (VALUE) \
- { \
- fputc (' ', FILE); \
- assemble_name (FILE, VALUE); \
- } \
- fputc ('\n', FILE); \
- } while (0)
-
-#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
-#undef UNIQUE_SECTION_P
-#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
-#define UNIQUE_SECTION(DECL,RELOC) \
-do { \
- int len, size, sec; \
- char *name, *string, *prefix; \
- static char *prefixes[5][2] = { \
- { ".text.", ".gnu.linkonce.t." }, \
- { ".rodata.", ".gnu.linkonce.r." }, \
- { ".data.", ".gnu.linkonce.d." }, \
- { ".sdata.", ".gnu.linkonce.s." }, \
- { "", "" } \
- }; \
- \
- name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
- size = int_size_in_bytes (TREE_TYPE (decl)); \
- \
- /* Determine the base section we are interested in: \
- 0=text, 1=rodata, 2=data, 3=sdata, [4=bss]. */ \
- if (TREE_CODE (DECL) == FUNCTION_DECL) \
- sec = 0; \
- else if (DECL_INITIAL (DECL) == 0 \
- || DECL_INITIAL (DECL) == error_mark_node) \
- sec = 4; \
- else if ((TARGET_EMBEDDED_PIC || TARGET_MIPS16) \
- && TREE_CODE (decl) == STRING_CST \
- && !flag_writable_strings) \
- { \
- /* For embedded position independent code, put constant strings \
- in the text section, because the data section is limited to \
- 64K in size. For mips16 code, put strings in the text \
- section so that a PC relative load instruction can be used to \
- get their address. */ \
- sec = 0; \
- } \
- else if (TARGET_EMBEDDED_DATA) \
- { \
- /* For embedded applications, always put an object in read-only data \
- if possible, in order to reduce RAM usage. */ \
- \
- if (DECL_READONLY_SECTION (DECL, RELOC)) \
- sec = 1; \
- else if (size > 0 && size <= mips_section_threshold) \
- sec = 3; \
- else \
- sec = 2; \
- } \
- else \
- { \
- /* For hosted applications, always put an object in small data if \
- possible, as this gives the best performance. */ \
- \
- if (size > 0 && size <= mips_section_threshold) \
- sec = 3; \
- else if (DECL_READONLY_SECTION (DECL, RELOC)) \
- sec = 1; \
- else \
- sec = 2; \
- } \
- \
- prefix = prefixes[sec][DECL_ONE_ONLY (DECL)]; \
- len = strlen (name) + strlen (prefix); \
- string = alloca (len + 1); \
- sprintf (string, "%s%s", prefix, name); \
- \
- DECL_SECTION_NAME (DECL) = build_string (len, string); \
-} while (0)
-
-/* Support the ctors/dtors and other sections. */
-
-/* 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\""
-
-/* A list of other sections which the compiler might be "in" at any
- given time. */
-#undef EXTRA_SECTIONS
-#define EXTRA_SECTIONS in_sdata, in_sbss, in_rdata, in_ctors, in_dtors
-
-#define INVOKE__main
-
-#undef EXTRA_SECTION_FUNCTIONS
-#define EXTRA_SECTION_FUNCTIONS \
- SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP) \
- SECTION_FUNCTION_TEMPLATE(sbss_section, in_sbss, SBSS_SECTION_ASM_OP) \
- SECTION_FUNCTION_TEMPLATE(rdata_section, in_rdata, RDATA_SECTION_ASM_OP) \
- SECTION_FUNCTION_TEMPLATE(ctors_section, in_ctors, CTORS_SECTION_ASM_OP) \
- SECTION_FUNCTION_TEMPLATE(dtors_section, in_dtors, DTORS_SECTION_ASM_OP)
+#define ASM_FINISH_DECLARE_OBJECT mips_finish_declare_object
-#define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \
-void FN () \
-{ \
- if (in_section != ENUM) \
- { \
- fprintf (asm_out_file, "%s\n", OP); \
- in_section = ENUM; \
- } \
-}
-
-
-/* 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, "\t%s\t", TARGET_LONG64 ? ".dword" : ".word"); \
- 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, "\t%s\t", TARGET_LONG64 ? ".dword" : ".word"); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, "\n"); \
- } while (0)
-
-#define CTOR_LIST_BEGIN \
-asm (CTORS_SECTION_ASM_OP); \
-func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) }
-
-#define CTOR_LIST_END \
-asm (CTORS_SECTION_ASM_OP); \
-func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
-
-#define DTOR_LIST_BEGIN \
-asm (DTORS_SECTION_ASM_OP); \
-func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) }
-
-#define DTOR_LIST_END \
-asm (DTORS_SECTION_ASM_OP); \
-func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
-
-/* Don't set the target flags, this is done by the linker script */
-#undef LIB_SPEC
+/* Leave the linker script to choose the appropriate libraries. */
+#undef LIB_SPEC
#define LIB_SPEC ""
#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "crtbegin%O%s %{!mno-crt0:crt0%O%s}"
+#define STARTFILE_SPEC "crti%O%s crtbegin%O%s"
#undef ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend%O%s"
+#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
+
+#define NO_IMPLICIT_EXTERN_C 1
+
+#define HANDLE_PRAGMA_PACK_PUSH_POP 1
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