1 /* tc-frv.h -- Header file for tc-frv.c. 2 Copyright 2002, 2004, 2005 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 2, 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 PARAMS ((void)); 46 #define md_cleanup frv_tomcat_workaround 47 48 #define md_number_to_chars frv_md_number_to_chars 49 50 extern long frv_relax_frag PARAMS ((fragS *, long)); 51 #define md_relax_frag(segment, fragP, stretch) frv_relax_frag(fragP, stretch) 52 53 #define tc_fix_adjustable(FIX) frv_fix_adjustable (FIX) 54 struct fix; 55 extern bfd_boolean frv_fix_adjustable PARAMS ((struct fix *)); 56 57 /* When relaxing, we need to emit various relocs we otherwise wouldn't. */ 58 #define TC_FORCE_RELOCATION(fix) frv_force_relocation (fix) 59 extern int frv_force_relocation PARAMS ((struct fix *)); 60 61 /* If we simplify subtractions that aren't SUB_SAME or SUB_ABS, we end 62 up with PCrel fixups, but since we don't have any PCrel relocs, we 63 crash. Preventing simplification gets us a good, early error. */ 64 #define TC_FORCE_RELOCATION_SUB_LOCAL(fixP) 1 65 66 #undef GAS_CGEN_MAX_FIXUPS 67 #define GAS_CGEN_MAX_FIXUPS 1 68 69 void frv_frob_label PARAMS ((symbolS *)); 70 #define tc_frob_label(sym) frv_frob_label(sym) 71 72 #define tc_gen_reloc gas_cgen_tc_gen_reloc 73 74 #define md_cgen_record_fixup_exp frv_cgen_record_fixup_exp 75 76 /* Call md_pcrel_from_section(), not md_pcrel_from(). */ 77 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) 78 extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); 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 PARAMS ((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) 125