1 /* GAS cgen support. 2 Copyright 1998, 1999, 2000, 2001, 2002, 2003 3 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 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 2, 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, 59 Temple Place - Suite 330, Boston, MA 20 02111-1307, USA. */ 21 22 #ifndef GAS_CGEN_H 23 #define GAS_CGEN_H 24 25 /* Opcode table handle. */ 26 extern CGEN_CPU_DESC gas_cgen_cpu_desc; 27 28 /* Maximum number of fixups in an insn. 29 If you need to change this, allow target to override and do so there. */ 30 #ifndef GAS_CGEN_MAX_FIXUPS 31 #define GAS_CGEN_MAX_FIXUPS 3 32 #endif 33 34 /* Struct defining result of gas_cgen_finish_insn. */ 35 typedef struct { 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 /* md_apply_fix3 handler */ 84 extern void gas_cgen_md_apply_fix3 (fixS *, valueT *, segT); 85 86 /* tc_gen_reloc handler */ 87 extern arelent *gas_cgen_tc_gen_reloc (asection *, fixS *); 88 89 /* Target supplied routine to lookup a reloc. */ 90 extern bfd_reloc_code_real_type 91 md_cgen_lookup_reloc (const CGEN_INSN *, const CGEN_OPERAND *, fixS *); 92 93 /* Optional target supplied routine to record a fixup for an expression. */ 94 extern fixS * 95 md_cgen_record_fixup_exp (fragS *, int, const CGEN_INSN *, int, 96 const CGEN_OPERAND *, int, expressionS *); 97 98 extern void gas_cgen_md_operand (expressionS *); 99 100 /* Perform any cgen specific initialisation for gas. */ 101 extern void gas_cgen_begin (void); 102 103 #endif /* GAS_CGEN_H */ 104