| /* Definitions of target machine for GNU compiler. MIPS R3000 version with |
| GOFAST floating point library. |
| Copyright (C) 1994, 1997, 1999, 2000 Free Software Foundation, Inc. |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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) |
| any later version. |
| |
| GNU CC 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"); \ |
| fprintf (asm_out_text_file, HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT) (a)); \ |
| fprintf (asm_out_text_file, ";"); \ |
| } 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'. */ |
| |
| #undef MAX_OFILE_ALIGNMENT |
| #define MAX_OFILE_ALIGNMENT (32768*8) |
| |
| /* 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 |
| 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 "\t.type\t" |
| #define SIZE_ASM_OP "\t.size\t" |
| |
| /* 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 "\t.section\t.bss" |
| #endif |
| |
| #undef SBSS_SECTION_ASM_OP |
| #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. */ |
| |
| #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); \ |
| 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, ","); \ |
| fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ |
| int_size_in_bytes (TREE_TYPE (DECL))); \ |
| fprintf (FILE, "\n"); \ |
| } \ |
| 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. */ |
| |
| #undef ASM_FINISH_DECLARE_OBJECT |
| #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ |
| do { \ |
| const 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, "%s", SIZE_ASM_OP); \ |
| assemble_name (FILE, name); \ |
| fprintf (FILE, ","); \ |
| fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ |
| int_size_in_bytes (TREE_TYPE (DECL))); \ |
| fprintf (FILE, "\n"); \ |
| } \ |
| } 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. */ |
| |
| #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 { \ |
| 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 |
| #define UNIQUE_SECTION(DECL,RELOC) \ |
| mips_unique_section ((DECL), (RELOC)) |
| |
| /* 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 |
| |
| #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) |
| |
| #define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \ |
| void FN () \ |
| { \ |
| if (in_section != ENUM) \ |
| { \ |
| fprintf (asm_out_file, "%s\n", OP); \ |
| in_section = ENUM; \ |
| } \ |
| } |
| |
| /* 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. */ |
| |
| #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 "crti%O%s crtbegin%O%s %{!mno-crt0:crt0%O%s}" |
| |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC "crtend%O%s crtn%O%s" |
