projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 36591ba1 SL |
1 | /* Definitions for Altera Nios II assembler. |
| 2 | Copyright (C) 2012, 2013 Free Software Foundation, Inc. | |
| 3 | Contributed by Nigel Gray (ngray@altera.com). | |
| 4 | Contributed by Mentor Graphics, Inc. | |
| 5 | ||
| 6 | This file is part of GAS, the GNU Assembler. | |
| 7 | ||
| 8 | GAS is free software; you can redistribute it and/or modify | |
| 9 | it under the terms of the GNU General Public License as published by | |
| 10 | the Free Software Foundation; either version 3, or (at your option) | |
| 11 | any later version. | |
| 12 | ||
| 13 | GAS is distributed in the hope that it will be useful, | |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | GNU General Public License for more details. | |
| 17 | ||
| 18 | You should have received a copy of the GNU General Public License | |
| 19 | along with GAS; see the file COPYING. If not, write to the Free | |
| 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
| 21 | 02110-1301, USA. */ | |
| 22 | ||
| 23 | #ifndef TC_NIOS2 | |
| 24 | #define TC_NIOS2 | |
| 25 | ||
| 26 | /* If unspecified, default to little endian. We can explicitly specify | |
| 27 | * a big-endian default by configuring with --target=nios2eb-elf. We | |
| 28 | * can override the default with the -EB and -EL options. */ | |
| 29 | #ifndef TARGET_BYTES_BIG_ENDIAN | |
| 30 | #define TARGET_BYTES_BIG_ENDIAN 0 | |
| 31 | #endif | |
| 32 | ||
| 33 | /* Words are big enough to hold addresses. */ | |
| 34 | #define WORKING_DOT_WORD 1 | |
| 35 | ||
| 36 | #ifdef OBJ_ELF | |
| 37 | extern const char *nios2_target_format (void); | |
| 38 | #define TARGET_FORMAT nios2_target_format () | |
| 39 | #define TARGET_ARCH bfd_arch_nios2 | |
| 40 | #endif | |
| 41 | ||
| 42 | /* A NIOS2 instruction consists of tokens and separator characters | |
| 43 | the tokens are things like the instruction name (add, or jmp etc), | |
| 44 | the register indices ($5, $7 etc), and constant expressions. The | |
| 45 | separator characters are commas, brackets and space. | |
| 46 | The instruction name is always separated from other tokens by a space | |
| 47 | The maximum number of tokens in an instruction is 5 (the instruction name, | |
| 48 | 3 arguments, and a 4th string representing the expected instructin opcode | |
| 49 | after assembly. The latter is only used when the assemble is running in | |
| 50 | self test mode, otherwise its presence will generate an error. */ | |
| 51 | #define NIOS2_MAX_INSN_TOKENS 6 | |
| 52 | ||
| 53 | /* There are no machine-specific operands so we #define this to nothing. */ | |
| 54 | #define md_operand(x) | |
| 55 | ||
| 56 | /* Function prototypes exported to rest of GAS. */ | |
| 57 | extern void md_assemble (char *op_str); | |
| 58 | extern void md_end (void); | |
| 59 | extern void md_begin (void); | |
| 60 | ||
| 61 | #define TC_FORCE_RELOCATION(fixp) nios2_force_relocation (fixp) | |
| 62 | extern int nios2_force_relocation (struct fix *); | |
| 63 | ||
| 64 | #define tc_fix_adjustable(fixp) nios2_fix_adjustable (fixp) | |
| 65 | extern int nios2_fix_adjustable (struct fix *); | |
| 66 | ||
| 67 | #define tc_frob_label(lab) nios2_frob_label (lab) | |
| 68 | extern void nios2_frob_label (symbolS *); | |
| 69 | ||
| 70 | #define tc_frob_symbol(symp, punt) punt = nios2_frob_symbol (symp) ? 1 : punt | |
| 71 | extern int nios2_frob_symbol (symbolS * symp); | |
| 72 | ||
| 73 | #define md_cons_align(nbytes) nios2_cons_align (nbytes) | |
| 74 | extern void nios2_cons_align (int); | |
| 75 | ||
| 76 | extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP); | |
| 77 | ||
| 78 | /* When relaxing, we need to generate relocations for alignment | |
| 79 | directives. */ | |
| 80 | #define HANDLE_ALIGN(frag) nios2_handle_align (frag) | |
| 81 | extern void nios2_handle_align (fragS *); | |
| 82 | ||
| 83 | #define md_relax_frag nios2_relax_frag | |
| 84 | extern long nios2_relax_frag (segT segment, fragS * fragP, long stretch); | |
| 85 | ||
| 86 | #ifdef OBJ_ELF | |
| 87 | #define ELF_TC_SPECIAL_SECTIONS \ | |
| 88 | { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \ | |
| 89 | { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \ | |
| 90 | { ".lit4", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, \ | |
| 91 | { ".lit8", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, | |
| 92 | ||
| 93 | /* Processor-specific section directives. */ | |
| 94 | #define md_elf_section_letter nios2_elf_section_letter | |
| 95 | extern int nios2_elf_section_letter (int, char **); | |
| 96 | #define md_elf_section_flags nios2_elf_section_flags | |
| 97 | extern flagword nios2_elf_section_flags (flagword, int, int); | |
| 98 | #endif | |
| 99 | ||
| 100 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" | |
| 101 | ||
| 102 | #define DIFF_EXPR_OK | |
| 103 | ||
| 104 | /* Nios2 ABI doesn't have 32-bit PCREL relocation, and, as relocations for | |
| 105 | CFI information will be in section other than .text, we can't use PC-biased | |
| 106 | relocs. */ | |
| 107 | #define CFI_DIFF_EXPR_OK 0 | |
| 108 | ||
| 109 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) nios2_cons (EXP, NBYTES) | |
| 110 | extern void nios2_cons (expressionS *exp, int size); | |
| 111 | ||
| 112 | #define TC_CONS_FIX_NEW nios2_cons_fix_new | |
| 113 | extern void nios2_cons_fix_new (struct frag *frag, int where, | |
| 114 | unsigned int nbytes, struct expressionS *exp); | |
| 115 | ||
| 116 | /* We want .cfi_* pseudo-ops for generating unwind info. */ | |
| 117 | #define TARGET_USE_CFIPOP 1 | |
| 118 | #define DWARF2_DEFAULT_RETURN_COLUMN 31 | |
| 119 | #define DWARF2_CIE_DATA_ALIGNMENT (-4) | |
| 120 | #define tc_regname_to_dw2regnum nios2_regname_to_dw2regnum | |
| 121 | extern int nios2_regname_to_dw2regnum (char *regname); | |
| 122 | #define tc_cfi_frame_initial_instructions nios2_frame_initial_instructions | |
| 123 | extern void nios2_frame_initial_instructions (void); | |
| 124 | ||
| 125 | #endif /* TC_NIOS2 */ |