153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
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/* Definitions of target machine for GNU compiler.
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For ARM with ELF obj format.
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Copyright (C) 1995-2021 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 GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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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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SUBSUBTARGET_EXTRA_SPECS
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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}"
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#endif
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#undef SUBSUBTARGET_EXTRA_SPECS
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#define SUBSUBTARGET_EXTRA_SPECS
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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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%(asm_cpu_spec) \
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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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%{mfloat-abi=*} %{!mfpu=auto: %{mfpu=*}} \
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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 arm_asm_declare_function_name
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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_OUTPUT_FN_UNWIND (FILE, FALSE); \
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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 and Thumb-2 jump tables in the text section, because it makes
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the code more efficient, but for Thumb-1 it's better to put them out of
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band unless we are generating compressed tables. */
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#define JUMP_TABLES_IN_TEXT_SECTION \
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((TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) \
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&& !target_pure_code)
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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_DEFAULT
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#define TARGET_DEFAULT (MASK_APCS_FRAME)
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#endif
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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/* Output an element in the static constructor array. */
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#undef TARGET_ASM_CONSTRUCTOR
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#define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor
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#undef TARGET_ASM_DESTRUCTOR
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#define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor
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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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/* 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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/* Horrible hack: We want to prevent some libgcc routines being included
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for some multilibs. The condition should match the one in
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libgcc/config/arm/lib1funcs.S and libgcc/config/arm/t-elf. */
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#if __ARM_ARCH_ISA_ARM || __ARM_ARCH_ISA_THUMB != 1
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#undef L_fixdfsi
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#undef L_fixunsdfsi
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#undef L_truncdfsf2
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#undef L_fixsfsi
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#undef L_fixunssfsi
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#undef L_floatdidf
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#undef L_floatdisf
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#undef L_floatundidf
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#undef L_floatundisf
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#endif
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