/* 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"
+#undef PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
-/* 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}}"
-
-/* 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
specified using the `__attribute__ ((aligned (N)))' construct. If
not defined, the default value is `BIGGEST_ALIGNMENT'. */
+#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)
-
-/* 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 if (! strcmp (NAME, ".bss")) \
- fprintf (F, "\t.section %s,\"aw\",@nobits\n", (NAME)); \
- else \
- fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME)); \
+/* 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
#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)
#define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE) \
do { \
} 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[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. */
-#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. */
-#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