/* Definitions of target machine for GNU compiler. MIPS R4000 version with
GOFAST floating point library.
- Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2002
+ Free Software Foundation, Inc.
This file is part of GNU CC.
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#undef OBJECT_FORMAT_COFF
+#undef EXTENDED_COFF
#define OBJECT_FORMAT_ELF
-/* Default to -mips3. */
-#define TARGET_DEFAULT MASK_FLOAT64|MASK_64BIT
-#define MIPS_ISA_DEFAULT 3
+#undef SDB_DEBUGGING_INFO
+#define DBX_DEBUGGING_INFO 1
+#define DWARF2_DEBUGGING_INFO 1
-/* 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
-
-/* US Software GOFAST library support. */
-#include "gofast.h"
-#define INIT_SUBTARGET_OPTABS INIT_GOFAST_OPTABS
-
-#include "mips/mips.h"
-
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dmips -DMIPSEB -DR4000 -D_mips -D_MIPSEB -D_R4000"
-
-/* I would rather put this in CPP_PREDEFINES, but the gcc driver
- doesn't handle -U options in CPP_PREDEFINES. */
-#undef SUBTARGET_CPP_SPEC
-#define SUBTARGET_CPP_SPEC "\
-%{!mips1:%{!mips2:-U__mips -D__mips=3 -D__mips64}}"
+#undef PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
-/* Use memcpy, et. al., rather than bcopy. */
-#define TARGET_MEM_FUNCTIONS
+#undef SUBTARGET_ASM_DEBUGGING_SPEC
+#define SUBTARGET_ASM_DEBUGGING_SPEC "-g0"
/* Biggest alignment supported by the object file format of this
machine. Use this macro to limit the alignment which can be
#undef MAX_OFILE_ALIGNMENT
#define MAX_OFILE_ALIGNMENT (32768*8)
-/* 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)
-
/* Switch into a generic section. */
#undef TARGET_ASM_NAMED_SECTION
#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
+/* Given that Irix has it's own headers, not having TARGET_GAS here
+ seems a mistake. If we actually need to be prepared for file
+ switching, then we need a custom TARGET_ASM_NAMED_SECTION too. */
+
+#undef TEXT_SECTION
+#define TEXT_SECTION() \
+do { \
+ if (TARGET_FILE_SWITCHING) \
+ abort (); \
+ fputs (TEXT_SECTION_ASM_OP, asm_out_file); \
+ fputc ('\n', asm_out_file); \
+} 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
#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
do { \
- fprintf (FILE, "%s", TYPE_ASM_OP); \
- assemble_name (FILE, NAME); \
- putc (',', FILE); \
- fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
- putc ('\n', FILE); \
+ HOST_WIDE_INT size; \
+ ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
size_directive_output = 0; \
if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
{ \
size_directive_output = 1; \
- fprintf (FILE, "%s", SIZE_ASM_OP); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
+ size = int_size_in_bytes (TREE_TYPE (DECL)); \
+ ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \
} \
mips_declare_object (FILE, NAME, "", ":\n", 0); \
} while (0)
#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
do { \
const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
+ HOST_WIDE_INT size; \
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, "%s", SIZE_ASM_OP); \
- assemble_name (FILE, name); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
+ size = int_size_in_bytes (TREE_TYPE (DECL)); \
+ ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
} \
} while (0)
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. */
+ should serve. */
#undef ASM_WEAKEN_LABEL
#define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)
} while (0)
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
-#undef UNIQUE_SECTION
-#define UNIQUE_SECTION(DECL,RELOC) \
-do { \
- int len, size, sec; \
- char *name, *string, *prefix; \
- static char *prefixes[4][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 = 2; \
- 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 names of and 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_NAME ".ctors"
-#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"aw\""
-#define DTORS_SECTION_NAME ".dtors"
-#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"aw\""
-
-/* There's no point providing a default definition of __CTOR_LIST__
- since people are expected either to use crtbegin.o, or an equivalent,
- or provide their own definition. */
-#define CTOR_LISTS_DEFINED_EXTERNALLY
+#define TARGET_ASM_UNIQUE_SECTION mips_unique_section
/* A list of other sections which the compiler might be "in" at any
given time. */
#undef EXTRA_SECTIONS
-#define EXTRA_SECTIONS in_sdata, in_rdata, in_ctors, in_dtors
-
-#define INVOKE__main
+#define EXTRA_SECTIONS in_sdata
#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS \
- SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_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)
+ SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP)
#define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \
void FN () \
} \
}
+/* On elf, 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.
+ The definitions say how to change sections to the .init and .fini
+ sections. This is the same for all known elf assemblers. */
-/* A C statement (sans semicolon) to output an element in the table of
- global constructors. */
-#undef ASM_OUTPUT_CONSTRUCTOR
-#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
- do { \
- ctors_section (); \
- fprintf (FILE, "\t%s\t", (Pmode == SImode) ? ".word" : ".dword"); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, "\n"); \
- } while (0)
-
-
-/* A C statement (sans semicolon) to output an element in the table of
- global destructors. */
-#undef ASM_OUTPUT_DESTRUCTOR
-#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
- do { \
- dtors_section (); \
- fprintf (FILE, "\t%s\t", (Pmode == SImode) ? ".word" : ".dword"); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, "\n"); \
- } while (0)
-
-#define CTOR_LIST_BEGIN \
-func_ptr __CTOR_LIST__ __attribute__((section(CTORS_SECTION_NAME))) = \
- (func_ptr) (-1)
-
-#define CTOR_LIST_END \
-func_ptr __CTOR_END__ __attribute__((section(CTORS_SECTION_NAME))) = \
- (func_ptr) 0
-
-#define DTOR_LIST_BEGIN \
-func_ptr __DTOR_LIST__ __attribute__((section(DTORS_SECTION_NAME))) = \
- (func_ptr) (-1)
-
-#define DTOR_LIST_END \
-func_ptr __DTOR_END__ __attribute__((section(DTORS_SECTION_NAME))) = \
- (func_ptr) 0
+#undef INIT_SECTION_ASM_OP
+#define INIT_SECTION_ASM_OP "\t.section\t.init"
+#undef FINI_SECTION_ASM_OP
+#define FINI_SECTION_ASM_OP "\t.section\t.fini"
/* Don't set the target flags, this is done by the linker script */
#undef LIB_SPEC
#define LIB_SPEC ""
#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "crtbegin%O%s %{!mno-crt0:crt0%O%s}"
+#if defined(HAVE_MIPS_LIBGLOSS_STARTUP_DIRECTIVES) \
+ || (MIPS_ABI_DEFAULT == ABI_MEABI)
+#define STARTFILE_SPEC "crti%O%s crtbegin%O%s"
+#else
+#define STARTFILE_SPEC "crti%O%s crtbegin%O%s %{!mno-crt0:crt0%O%s}"
+#endif
#undef ENDFILE_SPEC
-#define ENDFILE_SPEC "crtend%O%s"
+#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
git://gcc.gnu.org / gcc.git / blobdiff