| 1 | /* Definitions for TI C6X assembler. |
| 2 | Copyright 2010 |
| 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 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 | #define TC_TIC6X 1 |
| 23 | #define TARGET_BYTES_BIG_ENDIAN 0 |
| 24 | #define WORKING_DOT_WORD |
| 25 | #define DOUBLEBAR_PARALLEL |
| 26 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 |
| 27 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 28 | #define TC_PREDICATE_START_CHAR '[' |
| 29 | #define TC_PREDICATE_END_CHAR ']' |
| 30 | /* For TI C6X, we keep spaces in what the preprocessor considers |
| 31 | operands as they may separate functional unit specifiers from |
| 32 | operands. */ |
| 33 | #define TC_KEEP_OPERAND_SPACES 1 |
| 34 | |
| 35 | #define TARGET_ARCH bfd_arch_tic6x |
| 36 | #define TARGET_FORMAT (target_big_endian \ |
| 37 | ? "elf32-tic6x-be" \ |
| 38 | : "elf32-tic6x-le") |
| 39 | |
| 40 | typedef struct tic6x_label_list |
| 41 | { |
| 42 | struct tic6x_label_list *next; |
| 43 | symbolS *label; |
| 44 | } tic6x_label_list; |
| 45 | |
| 46 | /* Must be consistent with the enum in tc-tic6x.c. */ |
| 47 | #define TIC6X_NUM_UNWIND_REGS 13 |
| 48 | |
| 49 | /* Unwinding information state. */ |
| 50 | typedef struct tic6x_unwind_info { |
| 51 | int personality_index; |
| 52 | symbolS *personality_routine; |
| 53 | symbolS *function_start; |
| 54 | segT saved_seg; |
| 55 | subsegT saved_subseg; |
| 56 | /* NULL if table entry is inline. */ |
| 57 | symbolS *table_entry; |
| 58 | char *frag_start; |
| 59 | valueT data; |
| 60 | /* 0 before .cfi_startproc |
| 61 | -1 between .cfi_startproc and .handlerdata |
| 62 | >0 between .handlerdata and .endp */ |
| 63 | int data_bytes; |
| 64 | |
| 65 | offsetT reg_offset[TIC6X_NUM_UNWIND_REGS]; |
| 66 | bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS]; |
| 67 | int cfa_reg; |
| 68 | int return_reg; |
| 69 | unsigned safe_mask; |
| 70 | unsigned compact_mask; |
| 71 | unsigned reg_saved_mask; |
| 72 | offsetT cfa_offset; |
| 73 | bfd_boolean pop_rts; |
| 74 | /* Only valid for UNWIND_OP_POP_REG */ |
| 75 | int saved_reg_count; |
| 76 | } tic6x_unwind_info; |
| 77 | |
| 78 | typedef struct |
| 79 | { |
| 80 | /* Any labels seen since the last instruction or data. If not NULL, |
| 81 | a following instruction may not have parallel bars, but must |
| 82 | start a new execute packet. */ |
| 83 | tic6x_label_list *label_list; |
| 84 | |
| 85 | /* Whether compact instructions are forbidden here. */ |
| 86 | bfd_boolean nocmp; |
| 87 | |
| 88 | /* If there is a current execute packet, the frag being used for |
| 89 | that execute packet. */ |
| 90 | fragS *execute_packet_frag; |
| 91 | |
| 92 | /* If there is a current execute packet, a pointer to the |
| 93 | least-significant byte of the last instruction in it (for setting |
| 94 | the p-bit). */ |
| 95 | char *last_insn_lsb; |
| 96 | |
| 97 | /* If there has been an SPMASK instruction in the current execute |
| 98 | packet, a pointer to the first byte in it (for processing |
| 99 | ||^); otherwise NULL. */ |
| 100 | char *spmask_addr; |
| 101 | |
| 102 | /* The functional units used in the current execute packet, recorded |
| 103 | by setting the same bits as would be set in the 32-bit SPMASK |
| 104 | instruction. */ |
| 105 | unsigned int func_units_used; |
| 106 | |
| 107 | /* If an SPLOOP-family instruction has been seen, and a following |
| 108 | SPKERNEL-family instruction has not yet been seen, the ii value |
| 109 | from the SPLOOP instruction (in the range 1 to 14); otherwise |
| 110 | 0. */ |
| 111 | int sploop_ii; |
| 112 | |
| 113 | /* Bit N indicates that an R_C6000_NONE relocation has been output for |
| 114 | __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be |
| 115 | emitted only once per section, to save unnecessary bloat. */ |
| 116 | unsigned int marked_pr_dependency; |
| 117 | |
| 118 | tic6x_unwind_info *unwind; |
| 119 | tic6x_unwind_info *text_unwind; |
| 120 | } tic6x_segment_info_type; |
| 121 | #define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type |
| 122 | |
| 123 | typedef struct |
| 124 | { |
| 125 | /* Whether this machine-dependent frag is used for instructions (as |
| 126 | opposed to code alignment). */ |
| 127 | bfd_boolean is_insns; |
| 128 | |
| 129 | /* For a frag used for instructions, whether it is may cross a fetch |
| 130 | packet boundary (subject to alignment requirements). */ |
| 131 | bfd_boolean can_cross_fp_boundary; |
| 132 | } tic6x_frag_info; |
| 133 | #define TC_FRAG_TYPE tic6x_frag_info |
| 134 | #define TC_FRAG_INIT(fragP) tic6x_frag_init (fragP) |
| 135 | extern void tic6x_frag_init (fragS *fragp); |
| 136 | |
| 137 | typedef struct |
| 138 | { |
| 139 | /* Whether this fix was for an ADDA instruction. If so, a constant |
| 140 | resulting from resolving the fix should be implicitly shifted |
| 141 | left (it represents a value to be encoded literally in the |
| 142 | instruction, whereas a non-constant represents a DP-relative |
| 143 | value counting in the appropriate units). */ |
| 144 | bfd_boolean fix_adda; |
| 145 | /* The symbol to be subtracted in case of a PCR_H16 or PCR_L16 |
| 146 | reloc. */ |
| 147 | symbolS *fix_subsy; |
| 148 | } tic6x_fix_info; |
| 149 | #define TC_FIX_TYPE tic6x_fix_info |
| 150 | #define TC_INIT_FIX_DATA(fixP) tic6x_init_fix_data (fixP) |
| 151 | struct fix; |
| 152 | extern void tic6x_init_fix_data (struct fix *fixP); |
| 153 | |
| 154 | #define md_after_parse_args() tic6x_after_parse_args () |
| 155 | extern void tic6x_after_parse_args (void); |
| 156 | |
| 157 | #define md_cleanup() tic6x_cleanup () |
| 158 | extern void tic6x_cleanup (void); |
| 159 | |
| 160 | #define md_cons_align(n) tic6x_cons_align (n) |
| 161 | extern void tic6x_cons_align (int n); |
| 162 | |
| 163 | #define md_do_align(n, fill, len, max, label) \ |
| 164 | do { \ |
| 165 | if (tic6x_do_align (n, fill, len, max)) \ |
| 166 | goto label; \ |
| 167 | } while (0) |
| 168 | extern bfd_boolean tic6x_do_align (int n, char *fill, int len, int max); |
| 169 | |
| 170 | #define CONVERT_SYMBOLIC_ATTRIBUTE(name) \ |
| 171 | tic6x_convert_symbolic_attribute (name) |
| 172 | extern int tic6x_convert_symbolic_attribute (const char *); |
| 173 | |
| 174 | #define md_end() tic6x_end (); |
| 175 | extern void tic6x_end (void); |
| 176 | |
| 177 | #define md_parse_name(name, exprP, mode, nextcharP) \ |
| 178 | tic6x_parse_name (name, exprP, mode, nextcharP) |
| 179 | extern int tic6x_parse_name (const char *name, expressionS *exprP, |
| 180 | enum expr_mode mode, char *nextchar); |
| 181 | |
| 182 | #define MD_PCREL_FROM_SECTION(FIX, SEC) tic6x_pcrel_from_section (FIX, SEC) |
| 183 | extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec); |
| 184 | |
| 185 | #define md_start_line_hook() tic6x_start_line_hook () |
| 186 | extern void tic6x_start_line_hook (void); |
| 187 | |
| 188 | #define TC_CONS_FIX_NEW(frag, where, size, exp) \ |
| 189 | tic6x_cons_fix_new (frag, where, size, exp) |
| 190 | extern void tic6x_cons_fix_new (fragS *frag, int where, int size, |
| 191 | expressionS *exp); |
| 192 | |
| 193 | #define tc_fix_adjustable(FIX) tic6x_fix_adjustable (FIX) |
| 194 | extern bfd_boolean tic6x_fix_adjustable (struct fix *); |
| 195 | |
| 196 | #define tc_frob_label(sym) tic6x_frob_label (sym) |
| 197 | extern void tic6x_frob_label (symbolS *sym); |
| 198 | |
| 199 | #define tc_init_after_args() tic6x_init_after_args () |
| 200 | extern void tic6x_init_after_args (void); |
| 201 | |
| 202 | #define tc_unrecognized_line(c) tic6x_unrecognized_line (c) |
| 203 | extern int tic6x_unrecognized_line (int c); |
| 204 | |
| 205 | /* We want .cfi_* pseudo-ops for generating unwind info. */ |
| 206 | #define TARGET_USE_CFIPOP 1 |
| 207 | |
| 208 | /* CFI hooks. */ |
| 209 | #define tc_regname_to_dw2regnum tic6x_regname_to_dw2regnum |
| 210 | int tic6x_regname_to_dw2regnum (char *regname); |
| 211 | |
| 212 | #define tc_cfi_frame_initial_instructions tic6x_frame_initial_instructions |
| 213 | void tic6x_frame_initial_instructions (void); |
| 214 | |
| 215 | /* The return register is B3. */ |
| 216 | #define DWARF2_DEFAULT_RETURN_COLUMN (16 + 3) |
| 217 | |
| 218 | /* Registers are generally saved at negative offsets to the CFA. */ |
| 219 | #define DWARF2_CIE_DATA_ALIGNMENT (-4) |
| 220 | |
| 221 | #define tc_cfi_startproc tic6x_cfi_startproc |
| 222 | void tic6x_cfi_startproc (void); |
| 223 | |
| 224 | #define tc_cfi_endproc tic6x_cfi_endproc |
| 225 | struct fde_entry; |
| 226 | void tic6x_cfi_endproc (struct fde_entry *fde); |
| 227 | |
| 228 | #define tc_cfi_section_name ".c6xabi.exidx" |