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/* Definitions for Altera Nios II assembler.
Copyright (C) 2012, 2013 Free Software Foundation, Inc.
Contributed by Nigel Gray (ngray@altera.com).
Contributed by Mentor Graphics, Inc.
This file is part of GAS, the GNU Assembler.
GAS 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 3, or (at your option)
any later version.
GAS 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 GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef TC_NIOS2
#define TC_NIOS2
/* If unspecified, default to little endian. We can explicitly specify
* a big-endian default by configuring with --target=nios2eb-elf. We
* can override the default with the -EB and -EL options. */
#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 0
#endif
/* Words are big enough to hold addresses. */
#define WORKING_DOT_WORD 1
#ifdef OBJ_ELF
extern const char *nios2_target_format (void);
#define TARGET_FORMAT nios2_target_format ()
#define TARGET_ARCH bfd_arch_nios2
#endif
/* A NIOS2 instruction consists of tokens and separator characters
the tokens are things like the instruction name (add, or jmp etc),
the register indices ($5, $7 etc), and constant expressions. The
separator characters are commas, brackets and space.
The instruction name is always separated from other tokens by a space
The maximum number of tokens in an instruction is 5 (the instruction name,
3 arguments, and a 4th string representing the expected instructin opcode
after assembly. The latter is only used when the assemble is running in
self test mode, otherwise its presence will generate an error. */
#define NIOS2_MAX_INSN_TOKENS 6
/* There are no machine-specific operands so we #define this to nothing. */
#define md_operand(x)
/* Function prototypes exported to rest of GAS. */
extern void md_assemble (char *op_str);
extern void md_end (void);
extern void md_begin (void);
#define TC_FORCE_RELOCATION(fixp) nios2_force_relocation (fixp)
extern int nios2_force_relocation (struct fix *);
#define tc_fix_adjustable(fixp) nios2_fix_adjustable (fixp)
extern int nios2_fix_adjustable (struct fix *);
#define tc_frob_label(lab) nios2_frob_label (lab)
extern void nios2_frob_label (symbolS *);
#define tc_frob_symbol(symp, punt) punt = nios2_frob_symbol (symp) ? 1 : punt
extern int nios2_frob_symbol (symbolS * symp);
#define md_cons_align(nbytes) nios2_cons_align (nbytes)
extern void nios2_cons_align (int);
extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
/* When relaxing, we need to generate relocations for alignment
directives. */
#define HANDLE_ALIGN(frag) nios2_handle_align (frag)
extern void nios2_handle_align (fragS *);
#define md_relax_frag nios2_relax_frag
extern long nios2_relax_frag (segT segment, fragS * fragP, long stretch);
#ifdef OBJ_ELF
#define ELF_TC_SPECIAL_SECTIONS \
{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
{ ".lit4", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \
{ ".lit8", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
/* Processor-specific section directives. */
#define md_elf_section_letter nios2_elf_section_letter
extern int nios2_elf_section_letter (int, char **);
#define md_elf_section_flags nios2_elf_section_flags
extern flagword nios2_elf_section_flags (flagword, int, int);
#endif
#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
#define DIFF_EXPR_OK
/* Nios2 ABI doesn't have 32-bit PCREL relocation, and, as relocations for
CFI information will be in section other than .text, we can't use PC-biased
relocs. */
#define CFI_DIFF_EXPR_OK 0
#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) nios2_cons (EXP, NBYTES)
extern void nios2_cons (expressionS *exp, int size);
#define TC_CONS_FIX_NEW nios2_cons_fix_new
extern void nios2_cons_fix_new (struct frag *frag, int where,
unsigned int nbytes, struct expressionS *exp);
/* We want .cfi_* pseudo-ops for generating unwind info. */
#define TARGET_USE_CFIPOP 1
#define DWARF2_DEFAULT_RETURN_COLUMN 31
#define DWARF2_CIE_DATA_ALIGNMENT (-4)
#define tc_regname_to_dw2regnum nios2_regname_to_dw2regnum
extern int nios2_regname_to_dw2regnum (char *regname);
#define tc_cfi_frame_initial_instructions nios2_frame_initial_instructions
extern void nios2_frame_initial_instructions (void);
#endif /* TC_NIOS2 */
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