1 /* Definitions for TI C6X assembler. 2 Copyright (C) 2010-2016 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, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public 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 #define TC_TIC6X 1 22 #define TARGET_BYTES_BIG_ENDIAN 0 23 #define WORKING_DOT_WORD 24 #define DOUBLEBAR_PARALLEL 25 #define DWARF2_LINE_MIN_INSN_LENGTH 2 26 #define MD_APPLY_SYM_VALUE(FIX) 0 27 #define TC_PREDICATE_START_CHAR '[' 28 #define TC_PREDICATE_END_CHAR ']' 29 /* For TI C6X, we keep spaces in what the preprocessor considers 30 operands as they may separate functional unit specifiers from 31 operands. */ 32 #define TC_KEEP_OPERAND_SPACES 1 33 34 #define TARGET_ARCH bfd_arch_tic6x 35 #define TARGET_FORMAT (target_big_endian \ 36 ? "elf32-tic6x-be" \ 37 : "elf32-tic6x-le") 38 39 typedef struct tic6x_label_list 40 { 41 struct tic6x_label_list *next; 42 symbolS *label; 43 } tic6x_label_list; 44 45 /* Must be consistent with the enum in tc-tic6x.c. */ 46 #define TIC6X_NUM_UNWIND_REGS 13 47 48 /* Unwinding information state. */ 49 typedef struct tic6x_unwind_info { 50 int personality_index; 51 symbolS *personality_routine; 52 symbolS *function_start; 53 segT saved_seg; 54 subsegT saved_subseg; 55 /* NULL if table entry is inline. */ 56 symbolS *table_entry; 57 char *frag_start; 58 valueT data; 59 /* 0 before .cfi_startproc 60 -1 between .cfi_startproc and .handlerdata 61 >0 between .handlerdata and .endp */ 62 int data_bytes; 63 64 offsetT reg_offset[TIC6X_NUM_UNWIND_REGS]; 65 bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS]; 66 int cfa_reg; 67 int return_reg; 68 unsigned safe_mask; 69 unsigned compact_mask; 70 unsigned reg_saved_mask; 71 offsetT cfa_offset; 72 bfd_boolean pop_rts; 73 /* Only valid for UNWIND_OP_POP_REG */ 74 int saved_reg_count; 75 } tic6x_unwind_info; 76 77 typedef struct 78 { 79 /* Any labels seen since the last instruction or data. If not NULL, 80 a following instruction may not have parallel bars, but must 81 start a new execute packet. */ 82 tic6x_label_list *label_list; 83 84 /* Whether compact instructions are forbidden here. */ 85 bfd_boolean nocmp; 86 87 /* If there is a current execute packet, the frag being used for 88 that execute packet. */ 89 fragS *execute_packet_frag; 90 91 /* If there is a current execute packet, a pointer to the 92 least-significant byte of the last instruction in it (for setting 93 the p-bit). */ 94 char *last_insn_lsb; 95 96 /* If there has been an SPMASK instruction in the current execute 97 packet, a pointer to the first byte in it (for processing 98 ||^); otherwise NULL. */ 99 char *spmask_addr; 100 101 /* The functional units used in the current execute packet, recorded 102 by setting the same bits as would be set in the 32-bit SPMASK 103 instruction. */ 104 unsigned int func_units_used; 105 106 /* If an SPLOOP-family instruction has been seen, and a following 107 SPKERNEL-family instruction has not yet been seen, the ii value 108 from the SPLOOP instruction (in the range 1 to 14); otherwise 109 0. */ 110 int sploop_ii; 111 112 /* Bit N indicates that an R_C6000_NONE relocation has been output for 113 __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be 114 emitted only once per section, to save unnecessary bloat. */ 115 unsigned int marked_pr_dependency; 116 117 tic6x_unwind_info *unwind; 118 tic6x_unwind_info *text_unwind; 119 } tic6x_segment_info_type; 120 #define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type 121 122 typedef struct 123 { 124 /* Whether this machine-dependent frag is used for instructions (as 125 opposed to code alignment). */ 126 bfd_boolean is_insns; 127 128 /* For a frag used for instructions, whether it is may cross a fetch 129 packet boundary (subject to alignment requirements). */ 130 bfd_boolean can_cross_fp_boundary; 131 } tic6x_frag_info; 132 #define TC_FRAG_TYPE tic6x_frag_info 133 #define TC_FRAG_INIT(fragP) tic6x_frag_init (fragP) 134 extern void tic6x_frag_init (fragS *fragp); 135 136 typedef struct 137 { 138 /* Whether this fix was for an ADDA instruction. If so, a constant 139 resulting from resolving the fix should be implicitly shifted 140 left (it represents a value to be encoded literally in the 141 instruction, whereas a non-constant represents a DP-relative 142 value counting in the appropriate units). */ 143 bfd_boolean fix_adda; 144 /* The symbol to be subtracted in case of a PCR_H16 or PCR_L16 145 reloc. */ 146 symbolS *fix_subsy; 147 } tic6x_fix_info; 148 #define TC_FIX_TYPE tic6x_fix_info 149 #define TC_INIT_FIX_DATA(fixP) tic6x_init_fix_data (fixP) 150 struct fix; 151 extern void tic6x_init_fix_data (struct fix *fixP); 152 153 #define md_after_parse_args() tic6x_after_parse_args () 154 extern void tic6x_after_parse_args (void); 155 156 #define md_cleanup() tic6x_cleanup () 157 extern void tic6x_cleanup (void); 158 159 #define md_cons_align(n) tic6x_cons_align (n) 160 extern void tic6x_cons_align (int n); 161 162 #define md_do_align(n, fill, len, max, label) \ 163 do { \ 164 if (tic6x_do_align (n, fill, len, max)) \ 165 goto label; \ 166 } while (0) 167 extern bfd_boolean tic6x_do_align (int n, char *fill, int len, int max); 168 169 #define CONVERT_SYMBOLIC_ATTRIBUTE(name) \ 170 tic6x_convert_symbolic_attribute (name) 171 extern int tic6x_convert_symbolic_attribute (const char *); 172 173 #define md_end() tic6x_end (); 174 extern void tic6x_end (void); 175 176 #define md_parse_name(name, exprP, mode, nextcharP) \ 177 tic6x_parse_name (name, exprP, mode, nextcharP) 178 extern int tic6x_parse_name (const char *name, expressionS *exprP, 179 enum expr_mode mode, char *nextchar); 180 181 #define MD_PCREL_FROM_SECTION(FIX, SEC) tic6x_pcrel_from_section (FIX, SEC) 182 extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec); 183 184 #define md_start_line_hook() tic6x_start_line_hook () 185 extern void tic6x_start_line_hook (void); 186 187 #define TC_CONS_FIX_NEW(frag, where, size, exp, reloc) \ 188 tic6x_cons_fix_new (frag, where, size, exp, reloc) 189 extern void tic6x_cons_fix_new (fragS *, int, int, expressionS *, 190 bfd_reloc_code_real_type); 191 192 #define tc_fix_adjustable(FIX) tic6x_fix_adjustable (FIX) 193 extern bfd_boolean tic6x_fix_adjustable (struct fix *); 194 195 #define tc_frob_label(sym) tic6x_frob_label (sym) 196 extern void tic6x_frob_label (symbolS *sym); 197 198 #define tc_init_after_args() tic6x_init_after_args () 199 extern void tic6x_init_after_args (void); 200 201 #define tc_unrecognized_line(c) tic6x_unrecognized_line (c) 202 extern int tic6x_unrecognized_line (int c); 203 204 /* We want .cfi_* pseudo-ops for generating unwind info. */ 205 #define TARGET_USE_CFIPOP 1 206 207 /* CFI hooks. */ 208 #define tc_regname_to_dw2regnum tic6x_regname_to_dw2regnum 209 int tic6x_regname_to_dw2regnum (char *regname); 210 211 #define tc_cfi_frame_initial_instructions tic6x_frame_initial_instructions 212 void tic6x_frame_initial_instructions (void); 213 214 /* The return register is B3. */ 215 #define DWARF2_DEFAULT_RETURN_COLUMN (16 + 3) 216 217 /* Registers are generally saved at negative offsets to the CFA. */ 218 #define DWARF2_CIE_DATA_ALIGNMENT (-4) 219 220 #define tc_cfi_startproc tic6x_cfi_startproc 221 void tic6x_cfi_startproc (void); 222 223 #define tc_cfi_endproc tic6x_cfi_endproc 224 struct fde_entry; 225 void tic6x_cfi_endproc (struct fde_entry *fde); 226 227 #define tc_cfi_section_name ".c6xabi.exidx" 228
