| 1 | /* tc-nds32.h -- Header file for tc-nds32.c.
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| 2 | Copyright (C) 2012-2016 Free Software Foundation, Inc.
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| 3 | Contributed by Andes Technology Corporation.
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| 4 |
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| 5 | This file is part of GAS.
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| 6 |
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| 7 | GAS is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 3, or (at your option)
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| 10 | any later version.
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| 11 |
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| 12 | GAS is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with GAS; see the file COPYING. If not, write to the Free
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| 19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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| 20 | 02110-1301, USA. */
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| 21 |
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| 22 | #ifndef TC_NDS32
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| 23 | #define TC_NDS32
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| 24 |
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| 25 | #include "bfd_stdint.h"
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| 26 |
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| 27 | #define LISTING_HEADER \
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| 28 | (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian")
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| 29 |
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| 30 | /* The target BFD architecture. */
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| 31 | #define TARGET_ARCH bfd_arch_nds32
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| 32 |
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| 33 | /* mapping to mach_table[5] */
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| 34 | #define ISA_V1 bfd_mach_n1h
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| 35 | #define ISA_V2 bfd_mach_n1h_v2
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| 36 | #define ISA_V3 bfd_mach_n1h_v3
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| 37 | #define ISA_V3M bfd_mach_n1h_v3m
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| 38 |
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| 39 | /* Default to big endian. Please note that for Andes architecture,
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| 40 | instructions are always in big-endian format. */
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| 41 | #ifndef TARGET_BYTES_BIG_ENDIAN
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| 42 | #define TARGET_BYTES_BIG_ENDIAN 1
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| 43 | #endif
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| 44 |
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| 45 | /* as.c. */
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| 46 | /* Extend GAS command line option handling capability. */
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| 47 | extern int nds32_parse_option (int, const char *);
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| 48 | extern void nds32_after_parse_args (void);
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| 49 | /* The endianness of the target format may change based on command
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| 50 | line arguments. */
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| 51 | extern const char * nds32_target_format (void);
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| 52 |
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| 53 | #define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg)
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| 54 | #define md_after_parse_args() nds32_after_parse_args ()
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| 55 | #define TARGET_FORMAT nds32_target_format()
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| 56 |
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| 57 | /* expr.c */
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| 58 | extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *);
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| 59 | extern bfd_boolean nds32_allow_local_subtract (expressionS *, expressionS *, segT);
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| 60 | #define md_parse_name(name, exprP, mode, nextcharP) \
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| 61 | nds32_parse_name (name, exprP, mode, nextcharP)
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| 62 | #define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect)
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| 63 |
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| 64 | /* dwarf2dbg.c. */
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| 65 | #define DWARF2_USE_FIXED_ADVANCE_PC 1
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| 66 |
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| 67 | /* write.c. */
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| 68 | extern long nds32_pcrel_from_section (struct fix *, segT);
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| 69 | extern bfd_boolean nds32_fix_adjustable (struct fix *);
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| 70 | extern void nds32_frob_file (void);
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| 71 | extern void nds32_post_relax_hook (void);
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| 72 | extern void nds32_frob_file_before_fix (void);
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| 73 | extern void elf_nds32_final_processing (void);
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| 74 | extern int nds32_validate_fix_sub (struct fix *, segT);
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| 75 | extern int nds32_force_relocation (struct fix *);
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| 76 | extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int);
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| 77 |
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| 78 | /* Fill in rs_align_code fragments. TODO: Review this. */
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| 79 | extern void nds32_handle_align (fragS *);
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| 80 | extern int nds32_relax_frag (segT, fragS *, long);
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| 81 | extern int tc_nds32_regname_to_dw2regnum (char *);
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| 82 | extern void tc_nds32_frame_initial_instructions (void);
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| 83 |
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| 84 | #define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect)
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| 85 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0
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| 86 | #define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX)
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| 87 | #define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg)
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| 88 | #define md_post_relax_hook nds32_post_relax_hook ()
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| 89 | #define tc_frob_file_before_fix() nds32_frob_file_before_fix ()
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| 90 | #define elf_tc_final_processing() elf_nds32_final_processing ()
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| 91 | /* For DIFF relocations. The default behavior is inconsistent with the
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| 92 | asm internal document. */
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| 93 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
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| 94 | (! SEG_NORMAL (SEC) || TC_FORCE_RELOCATION (FIX))
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| 95 | #define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix)
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| 96 | #define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG)
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| 97 | #define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n)
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| 98 | /* Values passed to md_apply_fix don't include the symbol value. */
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| 99 | #define MD_APPLY_SYM_VALUE(FIX) 0
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| 100 | #define HANDLE_ALIGN(f) nds32_handle_align (f)
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| 101 | #undef DIFF_EXPR_OK /* They should be fixed in linker. */
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| 102 | #define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch)
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| 103 | #define WORKING_DOT_WORD /* We don't need to handle .word strangely. */
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| 104 | /* Using to chain fixup with previous fixup. */
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| 105 | #define TC_FIX_TYPE struct fix *
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| 106 | #define TC_INIT_FIX_DATA(fixP) \
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| 107 | do \
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| 108 | { \
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| 109 | fixP->tc_fix_data = NULL; \
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| 110 | } \
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| 111 | while (0)
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| 112 |
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| 113 | /* read.c. */
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| 114 | /* Extend GAS macro handling capability. */
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| 115 | extern void nds32_macro_start (void);
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| 116 | extern void nds32_macro_end (void);
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| 117 | extern void nds32_macro_info (void *);
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| 118 | extern void nds32_start_line_hook (void);
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| 119 | extern void nds32_elf_section_change_hook (void);
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| 120 | extern void md_begin (void);
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| 121 | extern void md_end (void);
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| 122 | extern int nds32_start_label (int, int);
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| 123 | extern void nds32_cleanup (void);
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| 124 | extern void nds32_flush_pending_output (void);
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| 125 | extern void nds32_cons_align (int);
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| 126 | extern void nds32_check_label (symbolS *);
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| 127 | extern void nds32_frob_label (symbolS *);
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| 128 | extern void nds32_pre_do_align (int, char *, int, int);
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| 129 | extern void nds32_do_align (int);
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| 130 |
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| 131 | #define md_macro_start() nds32_macro_start ()
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| 132 | #define md_macro_end() nds32_macro_end ()
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| 133 | #define md_macro_info(args) nds32_macro_info (args)
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| 134 | #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \
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| 135 | (NEXT_CHAR == ':' && nds32_start_label (0, 0))
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| 136 | #define tc_check_label(label) nds32_check_label (label)
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| 137 | #define tc_frob_label(label) nds32_frob_label (label)
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| 138 | #define md_end md_end
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| 139 | #define md_start_line_hook() nds32_start_line_hook ()
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| 140 | #define md_cons_align(n) nds32_cons_align (n)
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| 141 | /* COLE: TODO: Review md_do_align. */
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| 142 | #define md_do_align(N, FILL, LEN, MAX, LABEL) \
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| 143 | nds32_pre_do_align (N, FILL, LEN, MAX); \
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| 144 | if ((N) > 1 && (subseg_text_p (now_seg) \
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| 145 | || strncmp (now_seg->name, ".gcc_except_table", sizeof(".gcc_except_table") - 1) == 0)) \
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| 146 | nds32_do_align (N); \
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| 147 | goto LABEL;
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| 148 | #define md_elf_section_change_hook() nds32_elf_section_change_hook ()
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| 149 | #define md_flush_pending_output() nds32_flush_pending_output ()
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| 150 | #define md_cleanup() nds32_cleanup ()
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| 151 | #define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */
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| 152 |
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| 153 | /* frags.c. */
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| 154 |
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| 155 | enum FRAG_ATTR
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| 156 | {
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| 157 | NDS32_FRAG_RELAXABLE = 0x1,
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| 158 | NDS32_FRAG_RELAXED = 0x2,
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| 159 | NDS32_FRAG_BRANCH = 0x4,
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| 160 | NDS32_FRAG_LABEL = 0x8,
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| 161 | NDS32_FRAG_FINAL = 0x10,
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| 162 | NDS32_FRAG_RELAXABLE_BRANCH = 0x20,
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| 163 | NDS32_FRAG_ALIGN = 0x40
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| 164 | };
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| 165 |
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| 166 | struct nds32_frag_type
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| 167 | {
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| 168 | relax_substateT flag;
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| 169 | struct nds32_opcode *opcode;
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| 170 | uint32_t insn;
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| 171 | /* To Save previos label fixup if existence. */
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| 172 | struct fix *fixup;
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| 173 | };
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| 174 |
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| 175 | extern void nds32_frag_init (fragS *);
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| 176 |
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| 177 | #define TC_FRAG_TYPE struct nds32_frag_type
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| 178 | #define TC_FRAG_INIT(fragP) nds32_frag_init (fragP)
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| 179 |
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| 180 | /* CFI directive. */
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| 181 | extern void nds32_elf_frame_initial_instructions (void);
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| 182 | extern int tc_nds32_regname_to_dw2regnum (char *);
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| 183 |
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| 184 | #define TARGET_USE_CFIPOP 1
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| 185 | #define DWARF2_DEFAULT_RETURN_COLUMN 30
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| 186 | #define DWARF2_CIE_DATA_ALIGNMENT -4
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| 187 | #define DWARF2_LINE_MIN_INSN_LENGTH 2
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| 188 |
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| 189 | #define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum
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| 190 | #define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions
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| 191 |
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| 192 | /* COLE: TODO: Review These. They seem to be obsoleted. */
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| 193 | #if 1
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| 194 | #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
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| 195 | ((FIX)->fx_addsy == NULL \
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| 196 | || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
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| 197 | && ! S_IS_WEAK ((FIX)->fx_addsy) \
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| 198 | && S_IS_DEFINED ((FIX)->fx_addsy) \
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| 199 | && ! S_IS_COMMON ((FIX)->fx_addsy)))
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| 200 | #define TC_HANDLES_FX_DONE
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| 201 | /* This arranges for gas/write.c to not apply a relocation if
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| 202 | obj_fix_adjustable() says it is not adjustable. */
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| 203 | #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
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| 204 | #endif
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| 205 |
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| 206 | /* Because linker may relax the code, assemble-time expression
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| 207 | optimization is not allowed. */
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| 208 | #define md_allow_eh_opt 0
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| 209 |
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| 210 | /* For nds32 relax. */
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| 211 | enum nds32_br_range
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| 212 | {
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| 213 | BR_RANGE_S256 = 0,
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| 214 | BR_RANGE_S16K,
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| 215 | BR_RANGE_S64K,
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| 216 | BR_RANGE_S16M,
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| 217 | BR_RANGE_U4G,
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| 218 | BR_RANGE_NUM
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| 219 | };
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| 220 |
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| 221 | enum nds32_ramp
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| 222 | {
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| 223 | NDS32_CREATE_LABEL = 1,
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| 224 | NDS32_RELAX = (1 << 1), /* Obsolete in the future. */
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| 225 | NDS32_ORIGIN = (1 << 2),
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| 226 | NDS32_INSN16 = (1 << 3),
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| 227 | NDS32_PTR = (1 << 4),
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| 228 | NDS32_ABS = (1 << 5),
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| 229 | NDS32_HINT = (1 << 6),
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| 230 | NDS32_FIX = (1 << 7),
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| 231 | NDS32_ADDEND = (1 << 8),
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| 232 | NDS32_SYM = (1 << 9),
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| 233 | NDS32_PCREL = (1 << 10)
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| 234 | };
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| 235 |
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| 236 | typedef struct nds32_relax_fixup_info
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| 237 | {
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| 238 | int offset;
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| 239 | int size;
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| 240 | /* Reverse branch has to jump to the end of instruction pattern. */
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| 241 | int ramp;
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| 242 | enum bfd_reloc_code_real r_type;
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| 243 | } nds32_relax_fixup_info_t;
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| 244 |
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| 245 | typedef struct nds32_cond_field
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| 246 | {
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| 247 | int offset;
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| 248 | int bitpos; /* Register position. */
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| 249 | int bitmask; /* Number of register bits. */
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| 250 | bfd_boolean signed_extend;
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| 251 | } nds32_cond_field_t;
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| 252 |
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| 253 | /* The max relaxation pattern is 20-bytes including the nop. */
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| 254 | #define NDS32_MAXCHAR 20
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| 255 | /* In current, the max entend number of instruction for one pseudo instruction
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| 256 | is 4, but its number of relocation may be 12. */
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| 257 | #define MAX_RELAX_NUM 4
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| 258 | #define MAX_RELAX_FIX 12
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| 259 |
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| 260 | typedef struct nds32_relax_info
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| 261 | {
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| 262 | /* Opcode for the instruction. */
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| 263 | const char *opcode;
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| 264 | enum nds32_br_range br_range;
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| 265 | nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field? */
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| 266 | /* Code sequences for different branch range. */
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| 267 | uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM];
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| 268 | nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM];
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| 269 | unsigned int relax_code_size[BR_RANGE_NUM];
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| 270 | int relax_branch_isize[BR_RANGE_NUM];
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| 271 | nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_FIX];
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| 272 | } relax_info_t;
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| 273 |
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| 274 | enum nds32_relax_hint_type
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| 275 | {
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| 276 | NDS32_RELAX_HINT_NONE = 0,
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| 277 | NDS32_RELAX_HINT_LA,
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| 278 | NDS32_RELAX_HINT_LS
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| 279 | };
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| 280 |
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| 281 | struct nds32_relax_hint_table
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| 282 | {
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| 283 | enum nds32_relax_hint_type main_type;
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| 284 | unsigned int relax_code_size;
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| 285 | uint32_t relax_code_seq[MAX_RELAX_NUM];
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| 286 | nds32_relax_fixup_info_t relax_fixup[MAX_RELAX_FIX];
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| 287 | };
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| 288 |
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| 289 | #endif /* TC_NDS32 */
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