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133 lines
5.2 KiB
C
133 lines
5.2 KiB
C
/* Definitions for Altera Nios II assembler.
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Copyright (C) 2012-2021 Free Software Foundation, Inc.
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Contributed by Nigel Gray (ngray@altera.com).
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Contributed by Mentor Graphics, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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 3, or (at your option)
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any later version.
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GAS 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 GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef TC_NIOS2
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#define TC_NIOS2
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/* If unspecified, default to little endian. We can explicitly specify
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* a big-endian default by configuring with --target=nios2eb-elf. We
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* can override the default with the -EB and -EL options. */
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#ifndef TARGET_BYTES_BIG_ENDIAN
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#define TARGET_BYTES_BIG_ENDIAN 0
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#endif
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/* Words are big enough to hold addresses. */
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#define WORKING_DOT_WORD 1
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#ifdef OBJ_ELF
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extern const char *nios2_target_format (void);
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#define TARGET_FORMAT nios2_target_format ()
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#define TARGET_ARCH bfd_arch_nios2
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#endif
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/* A NIOS2 instruction consists of tokens and separator characters
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the tokens are things like the instruction name (add, or jmp etc),
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the register indices ($5, $7 etc), and constant expressions. The
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separator characters are commas, brackets and space.
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The instruction name is always separated from other tokens by a space
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The maximum number of tokens in an instruction is 5 (the instruction name,
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3 arguments, and a 4th string representing the expected instruct in opcode
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after assembly. The latter is only used when the assemble is running in
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self test mode, otherwise its presence will generate an error. */
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#define NIOS2_MAX_INSN_TOKENS 6
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/* There are no machine-specific operands so we #define this to nothing. */
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#define md_operand(x)
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/* Function prototypes exported to rest of GAS. */
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extern void md_assemble (char *op_str);
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extern void md_end (void);
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extern void md_begin (void);
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#define TC_FORCE_RELOCATION(fixp) nios2_force_relocation (fixp)
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extern int nios2_force_relocation (struct fix *);
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#define tc_fix_adjustable(fixp) nios2_fix_adjustable (fixp)
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extern int nios2_fix_adjustable (struct fix *);
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#define tc_frob_label(lab) nios2_frob_label (lab)
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extern void nios2_frob_label (symbolS *);
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#define tc_frob_symbol(symp, punt) punt = nios2_frob_symbol (symp) ? 1 : punt
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extern int nios2_frob_symbol (symbolS * symp);
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#define md_cons_align(nbytes) nios2_cons_align (nbytes)
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extern void nios2_cons_align (int);
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extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
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/* When relaxing, we need to generate relocations for alignment
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directives. */
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#define HANDLE_ALIGN(frag) nios2_handle_align (frag)
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extern void nios2_handle_align (fragS *);
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#define md_relax_frag nios2_relax_frag
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extern long nios2_relax_frag (segT segment, fragS * fragP, long stretch);
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#ifdef OBJ_ELF
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#define ELF_TC_SPECIAL_SECTIONS \
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{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".lit4", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
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{ ".lit8", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
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/* Processor-specific section directives. */
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#define md_elf_section_letter nios2_elf_section_letter
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extern int nios2_elf_section_letter (int, const char **);
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#define md_elf_section_flags nios2_elf_section_flags
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extern flagword nios2_elf_section_flags (flagword, int, int);
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#endif
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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#define DIFF_EXPR_OK
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/* Don't allow the generic code to convert fixups involving the
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subtraction of a label in the current section to pc-relative if we
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don't have the necessary pc-relative relocation. */
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
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(!((FIX)->fx_r_type == BFD_RELOC_16 \
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|| (FIX)->fx_r_type == BFD_RELOC_NIOS2_LO16 \
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|| (FIX)->fx_r_type == BFD_RELOC_NIOS2_HIADJ16))
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/* Nios2 ABI doesn't have 32-bit PCREL relocation, and, as relocations for
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CFI information will be in section other than .text, we can't use PC-biased
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relocs. */
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#define CFI_DIFF_EXPR_OK 0
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) nios2_cons (EXP, NBYTES)
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extern bfd_reloc_code_real_type nios2_cons (expressionS *exp, int size);
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/* We want .cfi_* pseudo-ops for generating unwind info. */
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#define TARGET_USE_CFIPOP 1
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#define DWARF2_DEFAULT_RETURN_COLUMN 31
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#define DWARF2_CIE_DATA_ALIGNMENT (-4)
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#define tc_regname_to_dw2regnum nios2_regname_to_dw2regnum
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extern int nios2_regname_to_dw2regnum (char *regname);
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#define tc_cfi_frame_initial_instructions nios2_frame_initial_instructions
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extern void nios2_frame_initial_instructions (void);
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#define elf_tc_final_processing nios2_elf_final_processing
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extern void nios2_elf_final_processing (void);
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#endif /* TC_NIOS2 */
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