gas/config/tc-kvx.h

   1 /* tc-kvx.h -- Header file for tc-kvx.c
   2
   3    Copyright (C) 2009-2024 Free Software Foundation, Inc.
   4    Contributed by Kalray SA.
   5
   6    This file is part of GAS.
   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 of the license, or
  11    (at your option) 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 this program; see the file COPYING3. If not,
  20    see <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef TC_KVX
  23 #define TC_KVX
  24
  25 #include "as.h"
  26 #include "include/hashtab.h"
  27 #include "opcode/kvx.h"
  28
  29 #ifdef OBJ_ELF
  30 #include "elf/kvx.h"
  31 #endif
  32
  33 #include <stdlib.h>
  34
  35 #define TARGET_ARCH bfd_arch_kvx
  36
  37 #define KVX_RA_REGNO (67)
  38 #define KVX_SP_REGNO (12)
  39
  40 #define O_pseudo_fixup O_md1
  41
  42 #define TOKEN_NAME(tok) \
  43   ((tok) <= 0 ? "unknown token" : env.tokens_names[(tok) - 1])
  44
  45 struct token_s {
  46   char *insn;
  47   int begin, end;
  48   int category;
  49   int64_t class_id;
  50   uint64_t val;
  51 };
  52
  53 struct token_list
  54 {
  55   char *tok;
  56   uint64_t val;
  57   int64_t class_id;
  58   int category;
  59   int loc;
  60   struct token_list *next;
  61   int len;
  62 };
  63
  64
  65 struct token_class {
  66   const char ** class_values;
  67   int64_t class_id;
  68   int sz;
  69 };
  70
  71 enum token_category {
  72   CAT_INSTRUCTION,
  73   CAT_MODIFIER,
  74   CAT_IMMEDIATE,
  75   CAT_SEPARATOR,
  76   CAT_REGISTER,
  77   CAT_INVALID
  78 };
  79
  80 struct token_classes {
  81   struct token_class *reg_classes;
  82   struct token_class *mod_classes;
  83   struct token_class *imm_classes;
  84   struct token_class *insn_classes;
  85   struct token_class *sep_classes;
  86 };
  87
  88 struct steering_rule {
  89   int steering;
  90   int jump_target;
  91   int stack_it;
  92 };
  93
  94 struct rule {
  95   struct steering_rule *rules;
  96 };
  97
  98 /* Default kvx_registers array. */
  99 extern const struct kvx_Register *kvx_registers;
 100 /* Default kvx_modifiers array. */
 101 extern const char ***kvx_modifiers;
 102 /* Default kvx_regfiles array. */
 103 extern const int *kvx_regfiles;
 104 /* Default values used if no assume directive is given */
 105 extern const struct kvx_core_info *kvx_core_info;
 106
 107 struct kvx_as_options {
 108   /* Arch string passed as argument with -march option.  */
 109   char *march;
 110   /* Resource usage checking.  */
 111   int check_resource_usage;
 112   /* Generate illegal code: only use for debugging !*/
 113   int generate_illegal_code;
 114   /* Dump asm tables: for debugging */
 115   int dump_table;
 116   /* Dump instructions: for documentation */
 117   int dump_insn;
 118   /* Enable multiline diagnostics */
 119   int diagnostics;
 120   /* Enable more helpful error messages */
 121   int more;
 122   /* Used for HW validation: allows all SFR in GET/SET/WFX */
 123   int allow_all_sfr;
 124 };
 125
 126 extern struct kvx_as_options kvx_options;
 127
 128 struct kvx_as_params {
 129   /* The target's ABI */
 130   int abi;
 131   /* The target's OS/ABI */
 132   int osabi;
 133   /* The target core (0: KV3-1, 1: KV3-2, 2: KV4-1) */
 134   int core;
 135   /* Guard to check if KVX_CORE has been set */
 136   int core_set;
 137   /* Guard to check if KVX_ABI has been set */
 138   int abi_set;
 139   /* Guard to check if KVX_OSABI has been set */
 140   int osabi_set;
 141   /* Flags controlling Position-Independent Code.  */
 142   flagword pic_flags;
 143   /* Either 32 or 64.  */
 144   int arch_size;
 145 };
 146
 147 extern struct kvx_as_params kvx_params;
 148
 149 struct kvx_as_env {
 150   const char ** tokens_names;
 151   int fst_reg, sys_reg, fst_mod;
 152   int (*promote_immediate) (int);
 153   struct rule *rules;
 154   struct token_classes *token_classes;
 155   struct node_s *insns;
 156   /* Records enabled options.  */
 157   struct kvx_as_options opts;
 158   /* Record the parameters of the target architecture.  */
 159   struct kvx_as_params params;
 160   /* The hash table of instruction opcodes.  */
 161   htab_t opcode_hash;
 162   /* The hash table of register symbols.  */
 163   htab_t reg_hash;
 164   /* The hash table of relocations for immediates.  */
 165   htab_t reloc_hash;
 166 };
 167
 168 extern struct kvx_as_env env;
 169
 170 struct token_list* parse (struct token_s tok);
 171 void print_token_list (struct token_list *lst);
 172 void free_token_list (struct token_list* tok_list);
 173 void setup (int version);
 174 void cleanup (void);
 175
 176 \f
 177 /* Hooks configuration.  */
 178
 179 extern const char * kvx_target_format (void);
 180 #undef TARGET_FORMAT
 181 #define TARGET_FORMAT kvx_target_format ()
 182
 183 /* default little endian */
 184 #define TARGET_BYTES_BIG_ENDIAN 0
 185 #define md_number_to_chars number_to_chars_littleendian
 186
 187 /* for now we have no BFD target */
 188
 189 /* lexing macros */
 190 /* Allow `$' in names.  */
 191 #define LEX_DOLLAR (LEX_BEGIN_NAME | LEX_NAME)
 192 /* Disable legacy `broken words' processing.  */
 193 #define WORKING_DOT_WORD
 194
 195 extern void kvx_end (void);
 196 #undef md_finish
 197 #define md_finish kvx_end
 198
 199 #define TC_FIX_TYPE struct _symbol_struct *
 200 #define TC_SYMFILED_TYPE struct list_info_struct *
 201 #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL)
 202 #define REPEAT_CONS_EXPRESSIONS
 203
 204 #define tc_frob_label(sym) kvx_frob_label(sym)
 205 #define tc_check_label(sym) kvx_check_label(sym)
 206 extern void kvx_frob_label (struct symbol *);
 207 extern void kvx_check_label (struct symbol *);
 208
 209 \f
 210 /* GAS listings (enabled by `-a') */
 211
 212 #define LISTING_HEADER "KVX GAS LISTING"
 213 #define LISTING_LHS_CONT_LINES 100
 214
 215
 216 #define md_start_line_hook kvx_md_start_line_hook
 217 extern void kvx_md_start_line_hook (void);
 218 #define md_emit_single_noop kvx_emit_single_noop()
 219 extern void kvx_emit_single_noop (void);
 220
 221 /* Values passed to md_apply_fix don't include the symbol value.  */
 222 #define MD_APPLY_SYM_VALUE(FIX) 0
 223
 224 /* Allow O_subtract in expressionS.  */
 225 #define DIFF_EXPR_OK 1
 226
 227 /* Controls the emission of relocations even when the symbol may be resolved
 228    directly by the assembler.  */
 229 extern int kvx_force_reloc (struct fix *);
 230 #undef TC_FORCE_RELOCATION
 231 #define TC_FORCE_RELOCATION(fixP) kvx_force_reloc(fixP)
 232
 233 /* Force a relocation for global symbols.  */
 234 #define EXTERN_FORCE_RELOC 1
 235
 236 /* Controls the resolution of fixup expressions involving the difference of two
 237    symbols.  */
 238 extern int kvx_force_reloc_sub_same (struct fix *, segT);
 239 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)                                 \
 240   (! SEG_NORMAL (S_GET_SEGMENT((FIX)->fx_addsy))                               \
 241    || kvx_force_reloc_sub_same(FIX, SEC))
 242
 243 /* This expression evaluates to true if the relocation is for a local object
 244    for which we still want to do the relocation at runtime.  False if we are
 245    willing to perform this relocation while building the .o file.
 246
 247    We can't resolve references to the GOT or the PLT when creating the object
 248    file, since these tables are only created by the linker.  Also, if the symbol
 249    is global, weak, common or not defined, the assembler can't compute the
 250    appropriate reloc, since its location can only be determined at link time.
 251    */
 252
 253 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
 254   (!(FIX)->fx_pcrel || TC_FORCE_RELOCATION (FIX))
 255
 256 /* This expression evaluates to false if the relocation is for a local object
 257    for which we still want to do the relocation at runtime.  True if we are
 258    willing to perform this relocation while building the .o file. This is only
 259    used for pcrel relocations. Use this to ensure that a branch to a preemptible
 260    symbol is not resolved by the assembler. */
 261
 262 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                                          \
 263   ((FIX)->fx_r_type != BFD_RELOC_KVX_23_PCREL                                  \
 264    || (FIX)->fx_addsy == NULL                                                  \
 265    || (! S_IS_EXTERNAL ((FIX)->fx_addsy)                                       \
 266        && ! S_IS_WEAK ((FIX)->fx_addsy)                                        \
 267        && S_IS_DEFINED ((FIX)->fx_addsy)                                       \
 268        && ! S_IS_COMMON ((FIX)->fx_addsy)))
 269
 270 /* Local symbols will be adjusted against the section symbol.  */
 271 #define tc_fix_adjustable(fixP) 1
 272
 273 /* This arranges for gas/write.c to not apply a relocation if
 274    tc_fix_adjustable says it is not adjustable.  The "! symbol_used_in_reloc_p"
 275    test is there specifically to cover the case of non-global symbols in
 276    linkonce sections.  It's the generally correct thing to do though;  If a
 277    reloc is going to be emitted against a symbol then we don't want to adjust
 278    the fixup by applying the reloc during assembly.  The reloc will be applied
 279    by the linker during final link.  */
 280 #define TC_FIX_ADJUSTABLE(fixP) \
 281   (! symbol_used_in_reloc_p ((fixP)->fx_addsy) && tc_fix_adjustable (fixP))
 282
 283 /* Force this to avoid -g to fail because of dwarf2 expression .L0 - .L0 */
 284 extern int kvx_validate_sub_fix (struct fix *fix);
 285 #define TC_VALIDATE_FIX_SUB(FIX, SEG)                                          \
 286   (((FIX)->fx_r_type == BFD_RELOC_32 || (FIX)->fx_r_type == BFD_RELOC_16)      \
 287    && kvx_validate_sub_fix((FIX)))
 288
 289 /* Generate a fix for a data allocation pseudo-op*/
 290 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP,RELOC) kvx_cons_fix_new(FRAG,OFF,LEN,EXP,RELOC)
 291 extern void kvx_cons_fix_new (fragS *f, int where, int nbytes,
 292                               expressionS *exp, bfd_reloc_code_real_type);
 293
 294 /* No post-alignment of sections */
 295 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 296
 297 /* Enable special handling for the alignment directive.  */
 298 extern void kvx_handle_align (fragS *);
 299 #undef HANDLE_ALIGN
 300 #define HANDLE_ALIGN kvx_handle_align
 301
 302 #ifdef OBJ_ELF
 303
 304 /* Enable CFI support.  */
 305 #define TARGET_USE_CFIPOP 1
 306
 307 extern void kvx_cfi_frame_initial_instructions (void);
 308 #undef tc_cfi_frame_initial_instructions
 309 #define tc_cfi_frame_initial_instructions kvx_cfi_frame_initial_instructions
 310
 311 extern int kvx_regname_to_dw2regnum (const char *regname);
 312 #undef tc_regname_to_dw2regnum
 313 #define tc_regname_to_dw2regnum kvx_regname_to_dw2regnum
 314
 315 /* All KVX instructions are multiples of 32 bits.  */
 316 #define DWARF2_LINE_MIN_INSN_LENGTH 1
 317 #define DWARF2_DEFAULT_RETURN_COLUMN (KVX_RA_REGNO)
 318 #define DWARF2_CIE_DATA_ALIGNMENT -4
 319 #endif
 320 #endif