| 1 | /* tc-frv.h -- Header file for tc-frv.c. |
| 2 | Copyright (C) 2002-2020 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 |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 19 | Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #define TC_FRV |
| 22 | |
| 23 | #define LISTING_HEADER "FRV GAS " |
| 24 | |
| 25 | /* The target BFD architecture. */ |
| 26 | #define TARGET_ARCH bfd_arch_frv |
| 27 | |
| 28 | #define TARGET_FORMAT (frv_md_fdpic_enabled () \ |
| 29 | ? "elf32-frvfdpic" : "elf32-frv") |
| 30 | extern bfd_boolean frv_md_fdpic_enabled (void); |
| 31 | |
| 32 | #define TARGET_BYTES_BIG_ENDIAN 1 |
| 33 | |
| 34 | /* Permit temporary numeric labels. */ |
| 35 | #define LOCAL_LABELS_FB 1 |
| 36 | |
| 37 | #define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */ |
| 38 | |
| 39 | /* We don't need to handle .word strangely. */ |
| 40 | #define WORKING_DOT_WORD |
| 41 | |
| 42 | /* Values passed to md_apply_fix don't include the symbol value. */ |
| 43 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 44 | |
| 45 | extern void frv_tomcat_workaround (void); |
| 46 | #define md_cleanup frv_tomcat_workaround |
| 47 | |
| 48 | #define md_number_to_chars frv_md_number_to_chars |
| 49 | extern void frv_md_number_to_chars (char *, valueT, int); |
| 50 | |
| 51 | extern long frv_relax_frag (fragS *, long); |
| 52 | #define md_relax_frag(segment, fragP, stretch) frv_relax_frag(fragP, stretch) |
| 53 | |
| 54 | #define tc_fix_adjustable(FIX) frv_fix_adjustable (FIX) |
| 55 | struct fix; |
| 56 | extern bfd_boolean frv_fix_adjustable (struct fix *); |
| 57 | |
| 58 | /* When relaxing, we need to emit various relocs we otherwise wouldn't. */ |
| 59 | #define TC_FORCE_RELOCATION(fix) frv_force_relocation (fix) |
| 60 | extern int frv_force_relocation (struct fix *); |
| 61 | |
| 62 | /* If we simplify subtractions that aren't SUB_SAME or SUB_ABS, we end |
| 63 | up with PCrel fixups, but since we don't have any PCrel relocs, we |
| 64 | crash. Preventing simplification gets us a good, early error. */ |
| 65 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1 |
| 66 | |
| 67 | #undef GAS_CGEN_MAX_FIXUPS |
| 68 | #define GAS_CGEN_MAX_FIXUPS 1 |
| 69 | |
| 70 | void frv_frob_label (symbolS *); |
| 71 | #define tc_frob_label(sym) frv_frob_label(sym) |
| 72 | |
| 73 | #define tc_gen_reloc gas_cgen_tc_gen_reloc |
| 74 | |
| 75 | #define md_cgen_record_fixup_exp frv_cgen_record_fixup_exp |
| 76 | |
| 77 | /* Call md_pcrel_from_section(), not md_pcrel_from(). */ |
| 78 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) |
| 79 | |
| 80 | /* After all of the symbols have been adjusted, go over the file looking |
| 81 | for any relocations that pic won't support. */ |
| 82 | #define tc_frob_file() frv_frob_file () |
| 83 | extern void frv_frob_file (void); |
| 84 | |
| 85 | /* We don't want 0x00 for code alignment because this generates `add.p |
| 86 | gr0, gr0, gr0' patterns. Although it's fine as a nop instruction, |
| 87 | it has the VLIW packing bit set, which means if you have a bunch of |
| 88 | them in a row and attempt to execute them, you'll exceed the VLIW |
| 89 | capacity and fail. This also gets GDB confused sometimes, because |
| 90 | it won't set breakpoints in instructions other than the first of a |
| 91 | VLIW pack, so you used to be unable to set a breakpoint in the |
| 92 | initial instruction of a function that followed such |
| 93 | alignment-introduced instructions. |
| 94 | |
| 95 | We could have arranged to emit `nop' instructions (0x80880000), |
| 96 | maybe even VLIW-pack sequences of nop instructions as much as |
| 97 | possible for the selected machine type, just in case the alignment |
| 98 | code actually happens to run, but this is probably too much effort |
| 99 | for little gain. This code is not meant to be run anyway, so just |
| 100 | emit nops. */ |
| 101 | #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4) |
| 102 | #define HANDLE_ALIGN(FRAGP) do \ |
| 103 | if ((FRAGP)->fr_type == rs_align_code) \ |
| 104 | { \ |
| 105 | valueT count = ((FRAGP)->fr_next->fr_address \ |
| 106 | - ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \ |
| 107 | char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \ |
| 108 | if ((count & 3) != 0) \ |
| 109 | { \ |
| 110 | memset (dest, 0, (count & 3)); \ |
| 111 | (FRAGP)->fr_fix += (count & 3); \ |
| 112 | dest += (count & 3); \ |
| 113 | count -= (count & 3); \ |
| 114 | } \ |
| 115 | if (count) \ |
| 116 | { \ |
| 117 | (FRAGP)->fr_var = 4; \ |
| 118 | *dest++ = 0x80; \ |
| 119 | *dest++ = 0x88; \ |
| 120 | *dest++ = 0x00; \ |
| 121 | *dest++ = 0x00; \ |
| 122 | } \ |
| 123 | } \ |
| 124 | while (0) |