189 lines
5.9 KiB
C
189 lines
5.9 KiB
C
/* Definitions of target machine for GNU compiler.
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For ARM with ELF obj format.
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Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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Contributed by Philip Blundell <philb@gnu.org> and
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Catherine Moore <clm@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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#ifndef OBJECT_FORMAT_ELF
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#error elf.h included before elfos.h
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#endif
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#ifndef LOCAL_LABEL_PREFIX
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#define LOCAL_LABEL_PREFIX "."
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#endif
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#ifndef SUBTARGET_CPP_SPEC
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#define SUBTARGET_CPP_SPEC "-D__ELF__"
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#endif
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#ifndef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS \
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{ "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \
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{ "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC },
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#endif
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#ifndef SUBTARGET_EXTRA_ASM_SPEC
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#define SUBTARGET_EXTRA_ASM_SPEC ""
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#endif
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#ifndef SUBTARGET_ASM_FLOAT_SPEC
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#define SUBTARGET_ASM_FLOAT_SPEC "\
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%{mapcs-float:-mfloat} %{msoft-float:-mno-fpu}"
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#endif
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#ifndef ASM_SPEC
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#define ASM_SPEC "\
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%{mbig-endian:-EB} \
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%{mlittle-endian:-EL} \
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%{mcpu=*:-mcpu=%*} \
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%{march=*:-march=%*} \
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%{mapcs-*:-mapcs-%*} \
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%(subtarget_asm_float_spec) \
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%{mthumb-interwork:-mthumb-interwork} \
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%(subtarget_extra_asm_spec)"
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#endif
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/* The ARM uses @ are a comment character so we need to redefine
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TYPE_OPERAND_FMT. */
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#undef TYPE_OPERAND_FMT
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#define TYPE_OPERAND_FMT "%%%s"
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/* We might need a ARM specific header to function declarations. */
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do \
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{ \
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ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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ASM_OUTPUT_LABEL(FILE, NAME); \
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} \
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while (0)
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/* We might need an ARM specific trailer for function declarations. */
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#undef ASM_DECLARE_FUNCTION_SIZE
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#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
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do \
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{ \
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ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \
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if (!flag_inhibit_size_directive) \
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ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
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} \
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while (0)
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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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/* We put ARM jump tables in the text section, because it makes the code
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more efficient, but for Thumb it's better to put them out of band. */
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#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_ARM)
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#ifndef LINK_SPEC
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#define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X"
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#endif
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/* Run-time Target Specification. */
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#ifndef TARGET_VERSION
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#define TARGET_VERSION fputs (" (ARM/elf)", stderr)
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#endif
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#ifndef TARGET_DEFAULT
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#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
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#endif
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#ifndef MULTILIB_DEFAULTS
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#define MULTILIB_DEFAULTS \
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{ "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
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#endif
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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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#ifndef ASM_FILE_START
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#define ASM_FILE_START(STREAM) \
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do \
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{ \
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fprintf (STREAM, "%s Generated by gcc %s for ARM/elf\n", \
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ASM_COMMENT_START, version_string); \
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output_file_directive (STREAM, main_input_filename); \
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fprintf (STREAM, ASM_APP_OFF); \
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} \
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while (0)
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#endif
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/* Output an internal label definition. */
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#undef ASM_OUTPUT_INTERNAL_LABEL
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#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
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do \
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{ \
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char * s = (char *) alloca (40 + strlen (PREFIX)); \
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extern int arm_target_label, arm_ccfsm_state; \
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extern rtx arm_target_insn; \
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\
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if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \
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&& !strcmp (PREFIX, "L")) \
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{ \
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arm_ccfsm_state = 0; \
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arm_target_insn = NULL; \
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} \
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ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \
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ASM_OUTPUT_LABEL (STREAM, s); \
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} \
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while (0)
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#undef TARGET_ASM_NAMED_SECTION
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#define TARGET_ASM_NAMED_SECTION arm_elf_asm_named_section
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGN) \
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do \
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{ \
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fprintf (STREAM, "\t.comm\t"); \
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assemble_name (STREAM, NAME); \
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fprintf (STREAM, ", %d, %d\n", SIZE, ALIGN); \
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} \
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while (0)
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/* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */
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#define NEED_PLT_RELOC flag_pic
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#define NEED_GOT_RELOC flag_pic
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/* The ELF assembler handles GOT addressing differently to NetBSD. */
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#define GOT_PCREL 0
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/* Biggest alignment supported by the object file format of this
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machine. Use this macro to limit the alignment which can be
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specified using the `__attribute__ ((aligned (N)))' construct. If
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not defined, the default value is `BIGGEST_ALIGNMENT'. */
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#define MAX_OFILE_ALIGNMENT (32768 * 8)
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/* Align output to a power of two. Note ".align 0" is redundant,
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and also GAS will treat it as ".align 2" which we do not want. */
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#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
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do \
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{ \
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if ((POWER) > 0) \
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fprintf (STREAM, "\t.align\t%d\n", POWER); \
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} \
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while (0)
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#define SUPPORTS_INIT_PRIORITY 1
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