1 /* GAS cgen support. 2 Copyright (C) 1998-2016 Free Software Foundation, Inc. 3 4 This file is part of GAS, the GNU Assembler. 5 6 GAS is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GAS is distributed in the hope that it will be useful, but WITHOUT 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 14 License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GAS; see the file COPYING. If not, write to the Free 18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 19 02110-1301, USA. */ 20 21 #ifndef GAS_CGEN_H 22 #define GAS_CGEN_H 23 24 /* Opcode table handle. */ 25 extern CGEN_CPU_DESC gas_cgen_cpu_desc; 26 27 /* Maximum number of fixups in an insn. 28 If you need to change this, allow target to override and do so there. */ 29 #ifndef GAS_CGEN_MAX_FIXUPS 30 #define GAS_CGEN_MAX_FIXUPS 3 31 #endif 32 33 /* Struct defining result of gas_cgen_finish_insn. */ 34 typedef struct 35 { 36 /* Frag containing the insn */ 37 fragS * frag; 38 /* Address of insn in frag. */ 39 char * addr; 40 /* Number of fixups this insn has. */ 41 int num_fixups; 42 /* Array of fixups. */ 43 fixS * fixups[GAS_CGEN_MAX_FIXUPS]; 44 } finished_insnS; 45 46 /* Callback for operand parsing. 47 The result is an error message or NULL for success. 48 The parsed value is stored in the bfd_vma *. */ 49 extern const char * gas_cgen_parse_operand 50 (CGEN_CPU_DESC, enum cgen_parse_operand_type, 51 const char **, int, int, enum cgen_parse_operand_result *, 52 bfd_vma *); 53 54 /* Call this from md_assemble to initialize the assembler callback. */ 55 extern void gas_cgen_init_parse (void); 56 57 /* Routines and macros for saving fixup chains. */ 58 extern void gas_cgen_save_fixups (int); 59 extern void gas_cgen_restore_fixups (int); 60 extern void gas_cgen_swap_fixups (int); 61 extern void gas_cgen_initialize_saved_fixups_array (void); 62 #define MAX_SAVED_FIXUP_CHAINS 50 63 64 /* Add a register to the assembler's hash table. 65 This makes lets GAS parse registers for us. 66 ??? This isn't currently used, but it could be in the future. */ 67 extern void cgen_asm_record_register (char *, int); 68 69 /* After CGEN_SYM (assemble_insn) is done, this is called to 70 output the insn and record any fixups. */ 71 extern void gas_cgen_finish_insn (const CGEN_INSN *, 72 CGEN_INSN_BYTES_PTR, unsigned int, 73 int, finished_insnS *); 74 75 /* Record a fixup. */ 76 extern fixS * gas_cgen_record_fixup (fragS *, int, const CGEN_INSN *, 77 int, const CGEN_OPERAND *, int, 78 symbolS *, offsetT); 79 extern fixS * gas_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, 80 int, const CGEN_OPERAND *, int, 81 expressionS *); 82 83 extern bfd_reloc_code_real_type gas_cgen_pcrel_r_type (bfd_reloc_code_real_type); 84 85 /* md_apply_fix handler. */ 86 extern void gas_cgen_md_apply_fix (fixS *, valueT *, segT); 87 88 /* tc_gen_reloc handler. */ 89 extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *); 90 91 /* Target supplied routine to lookup a reloc. */ 92 extern bfd_reloc_code_real_type 93 md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *); 94 95 /* Optional target supplied routine to record a fixup for an expression. */ 96 extern fixS * 97 md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int, 98 const CGEN_OPERAND *, int, expressionS *); 99 100 extern void gas_cgen_md_operand (expressionS *); 101 102 /* Perform any cgen specific initialisation for gas. */ 103 extern void gas_cgen_begin (void); 104 105 #endif /* GAS_CGEN_H */ 106
