| 1 | /* SuperH SH64-specific support for 32-bit ELF |
| 2 | Copyright (C) 2000-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program 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 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program 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 this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #define SH64_ELF |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include "bfd.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/sh.h" |
| 28 | #include "elf32-sh64.h" |
| 29 | #include "../opcodes/sh64-opc.h" |
| 30 | |
| 31 | static bfd_boolean sh64_address_in_cranges |
| 32 | (asection *cranges, bfd_vma, sh64_elf_crange *); |
| 33 | |
| 34 | /* Ordering functions of a crange, for the qsort and bsearch calls and for |
| 35 | different endianness. */ |
| 36 | |
| 37 | int |
| 38 | _bfd_sh64_crange_qsort_cmpb (const void *p1, const void *p2) |
| 39 | { |
| 40 | bfd_vma a1 = bfd_getb32 (p1); |
| 41 | bfd_vma a2 = bfd_getb32 (p2); |
| 42 | |
| 43 | /* Preserve order if there's ambiguous contents. */ |
| 44 | if (a1 == a2) |
| 45 | return (char *) p1 - (char *) p2; |
| 46 | |
| 47 | return a1 - a2; |
| 48 | } |
| 49 | |
| 50 | int |
| 51 | _bfd_sh64_crange_qsort_cmpl (const void *p1, const void *p2) |
| 52 | { |
| 53 | bfd_vma a1 = (bfd_vma) bfd_getl32 (p1); |
| 54 | bfd_vma a2 = (bfd_vma) bfd_getl32 (p2); |
| 55 | |
| 56 | /* Preserve order if there's ambiguous contents. */ |
| 57 | if (a1 == a2) |
| 58 | return (char *) p1 - (char *) p2; |
| 59 | |
| 60 | return a1 - a2; |
| 61 | } |
| 62 | |
| 63 | int |
| 64 | _bfd_sh64_crange_bsearch_cmpb (const void *p1, const void *p2) |
| 65 | { |
| 66 | bfd_vma a1 = *(bfd_vma *) p1; |
| 67 | bfd_vma a2 = (bfd_vma) bfd_getb32 (p2); |
| 68 | bfd_size_type size |
| 69 | = (bfd_size_type) bfd_getb32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2); |
| 70 | |
| 71 | if (a1 >= a2 + size) |
| 72 | return 1; |
| 73 | if (a1 < a2) |
| 74 | return -1; |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | int |
| 79 | _bfd_sh64_crange_bsearch_cmpl (const void *p1, const void *p2) |
| 80 | { |
| 81 | bfd_vma a1 = *(bfd_vma *) p1; |
| 82 | bfd_vma a2 = (bfd_vma) bfd_getl32 (p2); |
| 83 | bfd_size_type size |
| 84 | = (bfd_size_type) bfd_getl32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2); |
| 85 | |
| 86 | if (a1 >= a2 + size) |
| 87 | return 1; |
| 88 | if (a1 < a2) |
| 89 | return -1; |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | /* Check whether a specific address is specified within a .cranges |
| 94 | section. Return FALSE if not found, and TRUE if found, and the region |
| 95 | filled into RANGEP if non-NULL. */ |
| 96 | |
| 97 | static bfd_boolean |
| 98 | sh64_address_in_cranges (asection *cranges, bfd_vma addr, |
| 99 | sh64_elf_crange *rangep) |
| 100 | { |
| 101 | bfd_byte *cranges_contents; |
| 102 | bfd_byte *found_rangep; |
| 103 | bfd_size_type cranges_size = cranges->size; |
| 104 | |
| 105 | /* If the size is not a multiple of the cranges entry size, then |
| 106 | something is badly wrong. */ |
| 107 | if ((cranges_size % SH64_CRANGE_SIZE) != 0) |
| 108 | return FALSE; |
| 109 | |
| 110 | /* If this section has relocations, then we can't do anything sane. */ |
| 111 | if (bfd_get_section_flags (cranges->owner, cranges) & SEC_RELOC) |
| 112 | return FALSE; |
| 113 | |
| 114 | /* Has some kind soul (or previous call) left processed, sorted contents |
| 115 | for us? */ |
| 116 | if ((bfd_get_section_flags (cranges->owner, cranges) & SEC_IN_MEMORY) |
| 117 | && elf_section_data (cranges)->this_hdr.sh_type == SHT_SH5_CR_SORTED) |
| 118 | cranges_contents = cranges->contents; |
| 119 | else |
| 120 | { |
| 121 | if (!bfd_malloc_and_get_section (cranges->owner, cranges, |
| 122 | &cranges_contents)) |
| 123 | goto error_return; |
| 124 | |
| 125 | /* Is it sorted? */ |
| 126 | if (elf_section_data (cranges)->this_hdr.sh_type |
| 127 | != SHT_SH5_CR_SORTED) |
| 128 | /* Nope. Lets sort it. */ |
| 129 | qsort (cranges_contents, cranges_size / SH64_CRANGE_SIZE, |
| 130 | SH64_CRANGE_SIZE, |
| 131 | bfd_big_endian (cranges->owner) |
| 132 | ? _bfd_sh64_crange_qsort_cmpb : _bfd_sh64_crange_qsort_cmpl); |
| 133 | |
| 134 | /* Let's keep it around. */ |
| 135 | cranges->contents = cranges_contents; |
| 136 | bfd_set_section_flags (cranges->owner, cranges, |
| 137 | bfd_get_section_flags (cranges->owner, cranges) |
| 138 | | SEC_IN_MEMORY); |
| 139 | |
| 140 | /* It's sorted now. */ |
| 141 | elf_section_data (cranges)->this_hdr.sh_type = SHT_SH5_CR_SORTED; |
| 142 | } |
| 143 | |
| 144 | /* Try and find a matching range. */ |
| 145 | found_rangep |
| 146 | = bsearch (&addr, cranges_contents, cranges_size / SH64_CRANGE_SIZE, |
| 147 | SH64_CRANGE_SIZE, |
| 148 | bfd_big_endian (cranges->owner) |
| 149 | ? _bfd_sh64_crange_bsearch_cmpb |
| 150 | : _bfd_sh64_crange_bsearch_cmpl); |
| 151 | |
| 152 | /* Fill in a few return values if we found a matching range. */ |
| 153 | if (found_rangep) |
| 154 | { |
| 155 | enum sh64_elf_cr_type cr_type |
| 156 | = bfd_get_16 (cranges->owner, |
| 157 | SH64_CRANGE_CR_TYPE_OFFSET + found_rangep); |
| 158 | bfd_vma cr_addr |
| 159 | = bfd_get_32 (cranges->owner, |
| 160 | SH64_CRANGE_CR_ADDR_OFFSET |
| 161 | + (char *) found_rangep); |
| 162 | bfd_size_type cr_size |
| 163 | = bfd_get_32 (cranges->owner, |
| 164 | SH64_CRANGE_CR_SIZE_OFFSET |
| 165 | + (char *) found_rangep); |
| 166 | |
| 167 | rangep->cr_addr = cr_addr; |
| 168 | rangep->cr_size = cr_size; |
| 169 | rangep->cr_type = cr_type; |
| 170 | |
| 171 | return TRUE; |
| 172 | } |
| 173 | |
| 174 | /* There is a .cranges section, but it does not have a descriptor |
| 175 | matching this address. */ |
| 176 | return FALSE; |
| 177 | |
| 178 | error_return: |
| 179 | if (cranges_contents != NULL) |
| 180 | free (cranges_contents); |
| 181 | return FALSE; |
| 182 | } |
| 183 | |
| 184 | /* Determine what ADDR points to in SEC, and fill in a range descriptor in |
| 185 | *RANGEP if it's non-NULL. */ |
| 186 | |
| 187 | enum sh64_elf_cr_type |
| 188 | sh64_get_contents_type (asection *sec, bfd_vma addr, sh64_elf_crange *rangep) |
| 189 | { |
| 190 | asection *cranges; |
| 191 | |
| 192 | /* Fill in the range with the boundaries of the section as a default. */ |
| 193 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
| 194 | && elf_elfheader (sec->owner)->e_type == ET_EXEC) |
| 195 | { |
| 196 | rangep->cr_addr = bfd_get_section_vma (sec->owner, sec); |
| 197 | rangep->cr_size = sec->size; |
| 198 | rangep->cr_type = CRT_NONE; |
| 199 | } |
| 200 | else |
| 201 | return FALSE; |
| 202 | |
| 203 | /* If none of the pertinent bits are set, then it's a SHcompact (or at |
| 204 | least not SHmedia). */ |
| 205 | if ((elf_section_data (sec)->this_hdr.sh_flags |
| 206 | & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == 0) |
| 207 | { |
| 208 | enum sh64_elf_cr_type cr_type |
| 209 | = ((bfd_get_section_flags (sec->owner, sec) & SEC_CODE) != 0 |
| 210 | ? CRT_SH5_ISA16 : CRT_DATA); |
| 211 | rangep->cr_type = cr_type; |
| 212 | return cr_type; |
| 213 | } |
| 214 | |
| 215 | /* If only the SHF_SH5_ISA32 bit is set, then we have SHmedia. */ |
| 216 | if ((elf_section_data (sec)->this_hdr.sh_flags |
| 217 | & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == SHF_SH5_ISA32) |
| 218 | { |
| 219 | rangep->cr_type = CRT_SH5_ISA32; |
| 220 | return CRT_SH5_ISA32; |
| 221 | } |
| 222 | |
| 223 | /* Otherwise, we have to look up the .cranges section. */ |
| 224 | cranges = bfd_get_section_by_name (sec->owner, SH64_CRANGES_SECTION_NAME); |
| 225 | |
| 226 | if (cranges == NULL) |
| 227 | /* A mixed section but there's no .cranges section. This is probably |
| 228 | bad input; it does not comply to specs. */ |
| 229 | return CRT_NONE; |
| 230 | |
| 231 | /* If this call fails, we will still have CRT_NONE in rangep->cr_type |
| 232 | and that will be suitable to return. */ |
| 233 | sh64_address_in_cranges (cranges, addr, rangep); |
| 234 | |
| 235 | return rangep->cr_type; |
| 236 | } |
| 237 | |
| 238 | /* This is a simpler exported interface for the benefit of gdb et al. */ |
| 239 | |
| 240 | bfd_boolean |
| 241 | sh64_address_is_shmedia (asection *sec, bfd_vma addr) |
| 242 | { |
| 243 | sh64_elf_crange dummy; |
| 244 | return sh64_get_contents_type (sec, addr, &dummy) == CRT_SH5_ISA32; |
| 245 | } |