gas/config/tc-nds32.h

   1 /* tc-nds32.h -- Header file for tc-nds32.c.
   2    Copyright (C) 2012-2017 Free Software Foundation, Inc.
   3    Contributed by Andes Technology Corporation.
   4
   5    This file is part of GAS.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #ifndef TC_NDS32
  23 #define TC_NDS32
  24
  25 #include "bfd_stdint.h"
  26
  27 #define LISTING_HEADER \
  28   (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian")
  29
  30 /* The target BFD architecture.  */
  31 #define TARGET_ARCH             bfd_arch_nds32
  32
  33 /* mapping to mach_table[5] */
  34 #define ISA_V1      bfd_mach_n1h
  35 #define ISA_V2      bfd_mach_n1h_v2
  36 #define ISA_V3      bfd_mach_n1h_v3
  37 #define ISA_V3M     bfd_mach_n1h_v3m
  38
  39 /* Default to big endian. Please note that for Andes architecture,
  40    instructions are always in big-endian format.  */
  41 #ifndef TARGET_BYTES_BIG_ENDIAN
  42 #define TARGET_BYTES_BIG_ENDIAN 1
  43 #endif
  44
  45 /* as.c.  */
  46 /* Extend GAS command line option handling capability.  */
  47 extern int nds32_parse_option (int, const char *);
  48 extern void nds32_after_parse_args (void);
  49 /* The endianness of the target format may change based on command
  50    line arguments.  */
  51 extern const char * nds32_target_format (void);
  52
  53 #define md_parse_option(optc, optarg)   nds32_parse_option (optc, optarg)
  54 #define md_after_parse_args()           nds32_after_parse_args ()
  55 #define TARGET_FORMAT nds32_target_format()
  56
  57 /* expr.c */
  58 extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *);
  59 extern bfd_boolean nds32_allow_local_subtract (expressionS *, expressionS *, segT);
  60 #define md_parse_name(name, exprP, mode, nextcharP) \
  61         nds32_parse_name (name, exprP, mode, nextcharP)
  62 #define md_allow_local_subtract(lhs,rhs,sect)   nds32_allow_local_subtract (lhs, rhs, sect)
  63
  64 /* dwarf2dbg.c.  */
  65 #define DWARF2_USE_FIXED_ADVANCE_PC             1
  66
  67 /* write.c.  */
  68 extern long nds32_pcrel_from_section (struct fix *, segT);
  69 extern bfd_boolean nds32_fix_adjustable (struct fix *);
  70 extern void nds32_frob_file (void);
  71 extern void nds32_post_relax_hook (void);
  72 extern void nds32_frob_file_before_fix (void);
  73 extern void elf_nds32_final_processing (void);
  74 extern int nds32_validate_fix_sub (struct fix *, segT);
  75 extern int nds32_force_relocation (struct fix *);
  76 extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int);
  77
  78 /* Fill in rs_align_code fragments.  TODO: Review this.  */
  79 extern void nds32_handle_align (fragS *);
  80 extern int nds32_relax_frag (segT, fragS *, long);
  81 extern int tc_nds32_regname_to_dw2regnum (char *);
  82 extern void tc_nds32_frame_initial_instructions (void);
  83
  84 #define MD_PCREL_FROM_SECTION(fix, sect)        nds32_pcrel_from_section (fix, sect)
  85 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG        0
  86 #define tc_fix_adjustable(FIX)                  nds32_fix_adjustable (FIX)
  87 #define md_apply_fix(fixP, addn, seg)           nds32_apply_fix (fixP, addn, seg)
  88 #define md_post_relax_hook                      nds32_post_relax_hook ()
  89 #define tc_frob_file_before_fix()               nds32_frob_file_before_fix ()
  90 #define elf_tc_final_processing()               elf_nds32_final_processing ()
  91 /* For DIFF relocations.  The default behavior is inconsistent with the
  92    asm internal document.  */
  93 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)          \
  94   (! SEG_NORMAL (SEC) || TC_FORCE_RELOCATION (FIX))
  95 #define TC_FORCE_RELOCATION(fix)                nds32_force_relocation (fix)
  96 #define TC_VALIDATE_FIX_SUB(FIX,SEG)            nds32_validate_fix_sub (FIX,SEG)
  97 #define SET_SECTION_RELOCS(sec, relocs, n)      nds32_set_section_relocs (sec, relocs, n)
  98 /* Values passed to md_apply_fix don't include the symbol value.  */
  99 #define MD_APPLY_SYM_VALUE(FIX)                 0
 100 #define HANDLE_ALIGN(f)                         nds32_handle_align (f)
 101 #undef DIFF_EXPR_OK                             /* They should be fixed in linker.  */
 102 #define md_relax_frag(segment, fragP, stretch)  nds32_relax_frag (segment, fragP, stretch)
 103 #define WORKING_DOT_WORD                        /* We don't need to handle .word strangely.  */
 104 /* Using to chain fixup with previous fixup.  */
 105 #define TC_FIX_TYPE struct fix *
 106 #define TC_INIT_FIX_DATA(fixP)          \
 107   do                                    \
 108     {                                   \
 109       fixP->tc_fix_data = NULL;         \
 110     }                                   \
 111   while (0)
 112
 113 /* read.c.  */
 114 /* Extend GAS macro handling capability.  */
 115 extern void nds32_macro_start (void);
 116 extern void nds32_macro_end (void);
 117 extern void nds32_macro_info (void *);
 118 extern void nds32_start_line_hook (void);
 119 extern void nds32_elf_section_change_hook (void);
 120 extern void md_begin (void);
 121 extern void md_end (void);
 122 extern int nds32_start_label (int, int);
 123 extern void nds32_cleanup (void);
 124 extern void nds32_flush_pending_output (void);
 125 extern void nds32_cons_align (int);
 126 extern void nds32_check_label (symbolS *);
 127 extern void nds32_frob_label (symbolS *);
 128 extern void nds32_pre_do_align (int, char *, int, int);
 129 extern void nds32_do_align (int);
 130
 131 #define md_macro_start()                        nds32_macro_start ()
 132 #define md_macro_end()                          nds32_macro_end ()
 133 #define md_macro_info(args)                     nds32_macro_info (args)
 134 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR)        \
 135   (NEXT_CHAR == ':' && nds32_start_label (0, 0))
 136 #define tc_check_label(label)                   nds32_check_label (label)
 137 #define tc_frob_label(label)                    nds32_frob_label (label)
 138 #define md_end                                  md_end
 139 #define md_start_line_hook()                    nds32_start_line_hook ()
 140 #define md_cons_align(n)                        nds32_cons_align (n)
 141 /* COLE: TODO: Review md_do_align.  */
 142 #define md_do_align(N, FILL, LEN, MAX, LABEL)   \
 143   nds32_pre_do_align (N, FILL, LEN, MAX);       \
 144   if ((N) > 1 && (subseg_text_p (now_seg)       \
 145       || strncmp (now_seg->name, ".gcc_except_table", sizeof(".gcc_except_table") - 1) == 0)) \
 146     nds32_do_align (N);                         \
 147   goto LABEL;
 148 #define md_elf_section_change_hook()            nds32_elf_section_change_hook ()
 149 #define md_flush_pending_output()               nds32_flush_pending_output ()
 150 #define md_cleanup()                            nds32_cleanup ()
 151 #define LOCAL_LABELS_FB                         1 /* Permit temporary numeric labels.  */
 152
 153 /* frags.c.  */
 154
 155 enum FRAG_ATTR
 156 {
 157   NDS32_FRAG_RELAXABLE  = 0x1,
 158   NDS32_FRAG_RELAXED = 0x2,
 159   NDS32_FRAG_BRANCH = 0x4,
 160   NDS32_FRAG_LABEL = 0x8,
 161   NDS32_FRAG_FINAL = 0x10,
 162   NDS32_FRAG_RELAXABLE_BRANCH = 0x20,
 163   NDS32_FRAG_ALIGN = 0x40
 164 };
 165
 166 struct nds32_frag_type
 167 {
 168   relax_substateT flag;
 169   struct nds32_opcode *opcode;
 170   uint32_t insn;
 171   /* To Save previous label fixup if existence.  */
 172   struct fix *fixup;
 173 };
 174
 175 extern void nds32_frag_init (fragS *);
 176
 177 #define TC_FRAG_TYPE                            struct nds32_frag_type
 178 #define TC_FRAG_INIT(fragP)                     nds32_frag_init (fragP)
 179
 180 /* CFI directive.  */
 181 extern void nds32_elf_frame_initial_instructions (void);
 182 extern int tc_nds32_regname_to_dw2regnum (char *);
 183
 184 #define TARGET_USE_CFIPOP                       1
 185 #define DWARF2_DEFAULT_RETURN_COLUMN            30
 186 #define DWARF2_CIE_DATA_ALIGNMENT               -4
 187 #define DWARF2_LINE_MIN_INSN_LENGTH             2
 188
 189 #define tc_regname_to_dw2regnum                 tc_nds32_regname_to_dw2regnum
 190 #define tc_cfi_frame_initial_instructions       tc_nds32_frame_initial_instructions
 191
 192 /* COLE: TODO: Review These. They seem to be obsoleted.  */
 193 #if 1
 194 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                           \
 195    ((FIX)->fx_addsy == NULL                                     \
 196     || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                       \
 197         && ! S_IS_WEAK ((FIX)->fx_addsy)                        \
 198         && S_IS_DEFINED ((FIX)->fx_addsy)                       \
 199         && ! S_IS_COMMON ((FIX)->fx_addsy)))
 200 #define TC_HANDLES_FX_DONE
 201 /* This arranges for gas/write.c to not apply a relocation if
 202    obj_fix_adjustable() says it is not adjustable.  */
 203 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
 204 #endif
 205
 206 /* Because linker may relax the code, assemble-time expression
 207    optimization is not allowed.  */
 208 #define md_allow_eh_opt 0
 209
 210 /* For nds32 relax.  */
 211 enum nds32_br_range
 212 {
 213   BR_RANGE_S256 = 0,
 214   BR_RANGE_S16K,
 215   BR_RANGE_S64K,
 216   BR_RANGE_S16M,
 217   BR_RANGE_U4G,
 218   BR_RANGE_NUM
 219 };
 220
 221 enum nds32_ramp
 222 {
 223   NDS32_CREATE_LABEL = 1,
 224   NDS32_RELAX = (1 << 1), /* Obsolete in the future.  */
 225   NDS32_ORIGIN = (1 << 2),
 226   NDS32_INSN16 = (1 << 3),
 227   NDS32_PTR = (1 << 4),
 228   NDS32_ABS = (1 << 5),
 229   NDS32_HINT = (1 << 6),
 230   NDS32_FIX = (1 << 7),
 231   NDS32_ADDEND = (1 << 8),
 232   NDS32_SYM = (1 << 9),
 233   NDS32_PCREL = (1 << 10)
 234 };
 235
 236 typedef struct nds32_relax_fixup_info
 237 {
 238   int offset;
 239   int size;
 240   /* Reverse branch has to jump to the end of instruction pattern.  */
 241   int ramp;
 242   enum bfd_reloc_code_real r_type;
 243 } nds32_relax_fixup_info_t;
 244
 245 typedef struct nds32_cond_field
 246 {
 247   int offset;
 248   int bitpos; /* Register position.  */
 249   int bitmask; /* Number of register bits.  */
 250   bfd_boolean signed_extend;
 251 } nds32_cond_field_t;
 252
 253 /* The max relaxation pattern is 20-bytes including the nop.  */
 254 #define NDS32_MAXCHAR 20
 255 /* In current, the max extended number of instruction for one pseudo instruction
 256    is 4, but its number of relocation may be 12.  */
 257 #define MAX_RELAX_NUM 4
 258 #define MAX_RELAX_FIX 12
 259
 260 typedef struct nds32_relax_info
 261 {
 262   /* Opcode for the instruction.  */
 263   const char *opcode;
 264   enum nds32_br_range br_range;
 265   nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field?  */
 266   /* Code sequences for different branch range.  */
 267   uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM];
 268   nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM];
 269   unsigned int relax_code_size[BR_RANGE_NUM];
 270   int relax_branch_isize[BR_RANGE_NUM];
 271   nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_FIX];
 272 } relax_info_t;
 273
 274 enum nds32_relax_hint_type
 275 {
 276   NDS32_RELAX_HINT_NONE = 0,
 277   NDS32_RELAX_HINT_LA,
 278   NDS32_RELAX_HINT_LS
 279 };
 280
 281 struct nds32_relax_hint_table
 282 {
 283   enum nds32_relax_hint_type main_type;
 284   unsigned int relax_code_size;
 285   uint32_t relax_code_seq[MAX_RELAX_NUM];
 286   nds32_relax_fixup_info_t relax_fixup[MAX_RELAX_FIX];
 287 };
 288
 289 #endif /* TC_NDS32 */