210 lines
6.7 KiB
C
210 lines
6.7 KiB
C
/* Definitions of target machine for GNU compiler,
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for ARM with COFF obj format.
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Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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Contributed by Doug Evans (dje@cygnus.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "arm/semi.h"
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/* Run-time Target Specification. */
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#undef TARGET_VERSION
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#define TARGET_VERSION fputs (" (ARM/coff)", stderr)
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/* ??? Maybe use --with{enable?}-fpu or some such to make hardware floating
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point the default. NOT --nfp! --with{enable?} is supposed to replace it
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(right?), so let's stop using it. */
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT /*+ TARGET_CPU_DEFAULT*/)
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/* ??? Is a big-endian default intended to be supported? */
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#if 0 /*TARGET_CPU_DEFAULT & ARM_FLAG_BIG_END*/
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#define MULTILIB_DEFAULTS { "mbig-endian" }
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#else
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#define MULTILIB_DEFAULTS { "mlittle-endian" }
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#endif
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/* ??? Does arm.h really need to set this to 32? */
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#undef STRUCTURE_SIZE_BOUNDARY
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#define STRUCTURE_SIZE_BOUNDARY 8
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/* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
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is a valid machine specific attribute for DECL.
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The attributes in ATTRIBUTES have previously been assigned to DECL. */
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extern int arm_valid_machine_decl_attribute ();
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#define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
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arm_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
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/* This is COFF, but prefer stabs. */
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#define SDB_DEBUGGING_INFO
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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#include "dbxcoff.h"
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#undef LOCAL_LABEL_PREFIX
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#define LOCAL_LABEL_PREFIX "."
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#undef USER_LABEL_PREFIX
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#define USER_LABEL_PREFIX ""
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/* A C statement to output assembler commands which will identify the
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object file as having been compiled with GNU CC (or another GNU
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compiler). */
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/* Define this to NULL so we don't get anything.
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We have ASM_IDENTIFY_LANGUAGE.
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Also, when using stabs, gcc2_compiled must be a stabs entry, not an
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ordinary symbol, or gdb won't see it. The stabs entry must be
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before the N_SO in order for gdb to find it. */
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#define ASM_IDENTIFY_GCC(STREAM)
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/* This outputs a lot of .req's to define alias for various registers.
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Let's try to avoid this. */
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#undef ASM_FILE_START
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#define ASM_FILE_START(STREAM) \
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do { \
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extern char *version_string; \
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fprintf (STREAM, "%s Generated by gcc %s for ARM/coff\n", \
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ASM_COMMENT_START, version_string); \
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} while (0)
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/* A C statement to output something to the assembler file to switch to section
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NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
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NULL_TREE. Some target formats do not support arbitrary sections. Do not
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define this macro in such cases. */
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#define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
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do { \
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if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \
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fprintf (STREAM, "\t.section %s,\"x\"\n", (NAME)); \
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else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \
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fprintf (STREAM, "\t.section %s,\"\"\n", (NAME)); \
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else \
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fprintf (STREAM, "\t.section %s,\"w\"\n", (NAME)); \
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} while (0)
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/* Support the ctors/dtors and other sections. */
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#undef INIT_SECTION_ASM_OP
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/* Define this macro if jump tables (for `tablejump' insns) should be
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output in the text section, along with the assembler instructions.
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Otherwise, the readonly data section is used. */
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#define JUMP_TABLES_IN_TEXT_SECTION
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#undef READONLY_DATA_SECTION
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#define READONLY_DATA_SECTION rdata_section
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#undef RDATA_SECTION_ASM_OP
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#define RDATA_SECTION_ASM_OP "\t.section .rdata"
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#undef CTORS_SECTION_ASM_OP
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#define CTORS_SECTION_ASM_OP "\t.section .ctors,\"x\""
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#undef DTORS_SECTION_ASM_OP
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#define DTORS_SECTION_ASM_OP "\t.section .dtors,\"x\""
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/* A list of other sections which the compiler might be "in" at any
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given time. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_rdata, in_ctors, in_dtors
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#define SUBTARGET_EXTRA_SECTIONS
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/* A list of extra section function definitions. */
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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RDATA_SECTION_FUNCTION \
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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION \
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SUBTARGET_EXTRA_SECTION_FUNCTIONS
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#define SUBTARGET_EXTRA_SECTION_FUNCTIONS
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#define RDATA_SECTION_FUNCTION \
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void \
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rdata_section () \
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{ \
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if (in_section != in_rdata) \
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{ \
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fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP); \
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in_section = in_rdata; \
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} \
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}
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#define CTORS_SECTION_FUNCTION \
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void \
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ctors_section () \
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{ \
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if (in_section != in_ctors) \
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{ \
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fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
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in_section = in_ctors; \
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} \
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}
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#define DTORS_SECTION_FUNCTION \
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void \
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dtors_section () \
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{ \
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if (in_section != in_dtors) \
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{ \
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fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
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in_section = in_dtors; \
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} \
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}
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/* Support the ctors/dtors sections for g++. */
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#define INT_ASM_OP ".word"
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/* A C statement (sans semicolon) to output an element in the table of
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global constructors. */
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#undef ASM_OUTPUT_CONSTRUCTOR
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#define ASM_OUTPUT_CONSTRUCTOR(STREAM,NAME) \
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do { \
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ctors_section (); \
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fprintf (STREAM, "\t%s\t ", INT_ASM_OP); \
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assemble_name (STREAM, NAME); \
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fprintf (STREAM, "\n"); \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. */
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#undef ASM_OUTPUT_DESTRUCTOR
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#define ASM_OUTPUT_DESTRUCTOR(STREAM,NAME) \
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do { \
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dtors_section (); \
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fprintf (STREAM, "\t%s\t ", INT_ASM_OP); \
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assemble_name (STREAM, NAME); \
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fprintf (STREAM, "\n"); \
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} while (0)
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/* __CTOR_LIST__ and __DTOR_LIST__ must be defined by the linker script. */
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#define CTOR_LISTS_DEFINED_EXTERNALLY
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#undef DO_GLOBAL_CTORS_BODY
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#undef DO_GLOBAL_DTORS_BODY
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/* The ARM development system has atexit and doesn't have _exit,
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so define this for now. */
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#define HAVE_ATEXIT
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/* The ARM development system defines __main. */
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#define NAME__MAIN "__gccmain"
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#define SYMBOL__MAIN __gccmain
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