Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Internal definitions for libasm. |
Ulrich Drepper | a38998e | 2005-08-03 02:05:39 +0000 | [diff] [blame] | 2 | Copyright (C) 2002, 2004, 2005 Red Hat, Inc. |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame^] | 3 | This file is part of elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame^] | 5 | This file is free software; you can redistribute it and/or modify |
| 6 | it under the terms of either |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 7 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame^] | 8 | * the GNU Lesser General Public License as published by the Free |
| 9 | Software Foundation; either version 3 of the License, or (at |
| 10 | your option) any later version |
| 11 | |
| 12 | or |
| 13 | |
| 14 | * the GNU General Public License as published by the Free |
| 15 | Software Foundation; either version 2 of the License, or (at |
| 16 | your option) any later version |
| 17 | |
| 18 | or both in parallel, as here. |
| 19 | |
| 20 | elfutils is distributed in the hope that it will be useful, but |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame^] | 25 | You should have received copies of the GNU General Public License and |
| 26 | the GNU Lesser General Public License along with this program. If |
| 27 | not, see <http://www.gnu.org/licenses/>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 28 | |
| 29 | #ifndef _LIBASMP_H |
| 30 | #define _LIBASMP_H 1 |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | |
| 34 | #include <libasm.h> |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 35 | |
| 36 | /* gettext helper macros. */ |
| 37 | #define _(Str) dgettext ("elfutils", Str) |
| 38 | |
| 39 | |
| 40 | /* Known error codes. */ |
| 41 | enum |
| 42 | { |
| 43 | ASM_E_NOERROR, |
| 44 | ASM_E_NOMEM, /* No more memory. */ |
| 45 | ASM_E_CANNOT_CREATE, /* Output file cannot be created. */ |
| 46 | ASM_E_INVALID, /* Invalid parameters. */ |
| 47 | ASM_E_CANNOT_CHMOD, /* Cannot change mode of output file. */ |
| 48 | ASM_E_CANNOT_RENAME, /* Cannot rename output file. */ |
| 49 | ASM_E_DUPLSYM, /* Duplicate symbol definition. */ |
| 50 | ASM_E_LIBELF, /* Refer to error in libelf. */ |
| 51 | ASM_E_TYPE, /* Invalid section type for operation. */ |
Ulrich Drepper | a38998e | 2005-08-03 02:05:39 +0000 | [diff] [blame] | 52 | ASM_E_IOERROR, /* Error during output of data. */ |
Ulrich Drepper | 3cbdd38 | 2008-01-02 17:44:39 +0000 | [diff] [blame] | 53 | ASM_E_ENOSUP, /* No backend support. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 54 | ASM_E_NUM /* Keep this entry as the last. */ |
| 55 | }; |
| 56 | |
| 57 | |
| 58 | /* Special sections. */ |
| 59 | #define ASM_ABS_SCN ((Elf_Scn *) 1) |
| 60 | #define ASM_COM_SCN ((Elf_Scn *) 2) |
| 61 | |
| 62 | |
| 63 | /* And the hash table for symbols. */ |
| 64 | #include <symbolhash.h> |
| 65 | |
| 66 | |
| 67 | /* Descriptor for a section. */ |
| 68 | struct AsmScn |
| 69 | { |
| 70 | /* The underlying assembler context. */ |
| 71 | AsmCtx_t *ctx; |
| 72 | |
| 73 | /* Subsection ID. */ |
| 74 | unsigned int subsection_id; |
| 75 | |
| 76 | /* Section type. */ |
| 77 | GElf_Word type; |
| 78 | |
| 79 | union |
| 80 | { |
| 81 | /* Data only stored in the record for subsection zero. */ |
| 82 | struct |
| 83 | { |
| 84 | /* The ELF section. */ |
| 85 | Elf_Scn *scn; |
| 86 | |
| 87 | /* Entry in the section header string table. */ |
| 88 | struct Ebl_Strent *strent; |
| 89 | |
| 90 | /* Next member of group. */ |
| 91 | struct AsmScn *next_in_group; |
| 92 | } main; |
| 93 | |
| 94 | /* Pointer to the record for subsection zero. */ |
| 95 | AsmScn_t *up; |
| 96 | } data; |
| 97 | |
| 98 | /* Current offset in the (sub)section. */ |
| 99 | GElf_Off offset; |
| 100 | /* Maximum alignment of the section so far. */ |
| 101 | GElf_Word max_align; |
| 102 | |
| 103 | /* Section content. */ |
| 104 | struct AsmData |
| 105 | { |
| 106 | /* Currently used number of bytes in the block. */ |
| 107 | size_t len; |
| 108 | |
| 109 | /* Number of bytes allocated. */ |
| 110 | size_t maxlen; |
| 111 | |
| 112 | /* Pointer to the next block. */ |
| 113 | struct AsmData *next; |
| 114 | |
| 115 | /* The actual data. */ |
| 116 | char data[flexarr_size]; |
| 117 | } *content; |
| 118 | |
| 119 | /* Fill pattern. */ |
| 120 | struct FillPattern |
| 121 | { |
| 122 | size_t len; |
| 123 | char bytes[flexarr_size]; |
| 124 | } *pattern; |
| 125 | |
| 126 | /* Next subsection. */ |
| 127 | AsmScn_t *subnext; |
| 128 | |
| 129 | /* List of all allocated sections. */ |
| 130 | AsmScn_t *allnext; |
| 131 | |
| 132 | /* Name of the section. */ |
| 133 | char name[flexarr_size]; |
| 134 | }; |
| 135 | |
| 136 | |
| 137 | /* Descriptor used for the assembling session. */ |
| 138 | struct AsmCtx |
| 139 | { |
| 140 | /* File descriptor of the temporary file. */ |
| 141 | int fd; |
| 142 | |
| 143 | /* True if text output is wanted. */ |
| 144 | bool textp; |
| 145 | |
| 146 | /* Output file handle. */ |
| 147 | union |
| 148 | { |
| 149 | /* ELF descriptor of the temporary file. */ |
| 150 | Elf *elf; |
| 151 | /* I/O stream for text output. */ |
| 152 | FILE *file; |
| 153 | } out; |
| 154 | |
| 155 | |
| 156 | /* List with defined sections. */ |
| 157 | AsmScn_t *section_list; |
| 158 | /* Section header string table. */ |
| 159 | struct Ebl_Strtab *section_strtab; |
| 160 | |
| 161 | /* Table with defined symbols. */ |
| 162 | asm_symbol_tab symbol_tab; |
| 163 | /* Number of symbols in the table. */ |
| 164 | unsigned int nsymbol_tab; |
| 165 | /* Symbol string table. */ |
| 166 | struct Ebl_Strtab *symbol_strtab; |
| 167 | |
| 168 | /* List of section groups. */ |
| 169 | struct AsmScnGrp *groups; |
| 170 | /* Number of section groups. */ |
| 171 | size_t ngroups; |
| 172 | |
| 173 | /* Current required alignment for common symbols. */ |
| 174 | GElf_Word common_align; |
| 175 | |
| 176 | /* Lock to handle multithreaded programs. */ |
| 177 | rwlock_define (,lock); |
| 178 | |
| 179 | /* Counter for temporary symbols. */ |
| 180 | unsigned int tempsym_count; |
| 181 | |
| 182 | /* Name of the output file. */ |
| 183 | char *fname; |
| 184 | /* The name of the temporary file. */ |
| 185 | char tmp_fname[flexarr_size]; |
| 186 | }; |
| 187 | |
| 188 | |
| 189 | /* Descriptor for a symbol. */ |
| 190 | struct AsmSym |
| 191 | { |
| 192 | /* Reference to the section which contains the symbol. */ |
| 193 | AsmScn_t *scn; |
| 194 | |
| 195 | /* Type of the symbol. */ |
| 196 | int8_t type; |
| 197 | /* Binding of the symbol. */ |
| 198 | int8_t binding; |
| 199 | |
| 200 | /* Size of the symbol. */ |
| 201 | GElf_Xword size; |
| 202 | |
| 203 | /* Offset in the section. */ |
| 204 | GElf_Off offset; |
| 205 | |
| 206 | /* Symbol table index of the symbol in the symbol table. */ |
| 207 | size_t symidx; |
| 208 | |
| 209 | /* Reference to name of the symbol. */ |
| 210 | struct Ebl_Strent *strent; |
| 211 | }; |
| 212 | |
| 213 | |
| 214 | /* Descriptor for section group. */ |
| 215 | struct AsmScnGrp |
| 216 | { |
| 217 | /* Entry in the section header string table. */ |
| 218 | struct Ebl_Strent *strent; |
| 219 | |
| 220 | /* The ELF section. */ |
| 221 | Elf_Scn *scn; |
| 222 | |
| 223 | /* The signature. */ |
| 224 | struct AsmSym *signature; |
| 225 | |
| 226 | /* First member. */ |
| 227 | struct AsmScn *members; |
| 228 | /* Number of members. */ |
| 229 | size_t nmembers; |
| 230 | |
| 231 | /* Flags. */ |
| 232 | Elf32_Word flags; |
| 233 | |
| 234 | /* Next group. */ |
| 235 | struct AsmScnGrp *next; |
| 236 | |
| 237 | /* Name of the section group. */ |
| 238 | char name[flexarr_size]; |
| 239 | }; |
| 240 | |
| 241 | |
Ulrich Drepper | 3cbdd38 | 2008-01-02 17:44:39 +0000 | [diff] [blame] | 242 | /* Descriptor for disassembler. */ |
| 243 | struct DisasmCtx |
| 244 | { |
| 245 | /* Handle for the backend library with the disassembler routine. */ |
| 246 | Ebl *ebl; |
| 247 | |
| 248 | /* ELF file containing all the data passed to the function. This |
| 249 | allows to look up symbols. */ |
| 250 | Elf *elf; |
| 251 | |
| 252 | /* Callback function to determine symbol names. */ |
| 253 | DisasmGetSymCB_t symcb; |
| 254 | }; |
| 255 | |
| 256 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 257 | /* The default fill pattern: one zero byte. */ |
| 258 | extern const struct FillPattern *__libasm_default_pattern |
| 259 | attribute_hidden; |
| 260 | |
| 261 | |
| 262 | /* Ensure there are at least LEN bytes available in the output buffer |
| 263 | for ASMSCN. */ |
| 264 | extern int __libasm_ensure_section_space (AsmScn_t *asmscn, size_t len) |
| 265 | internal_function; |
| 266 | |
| 267 | /* Free all resources associated with the assembler context. */ |
| 268 | extern void __libasm_finictx (AsmCtx_t *ctx) internal_function; |
| 269 | |
| 270 | /* Set error code. */ |
| 271 | extern void __libasm_seterrno (int err) internal_function; |
| 272 | |
| 273 | /* Return handle for the named section. If it was not used before |
| 274 | create it. */ |
| 275 | extern AsmScn_t *__asm_newscn_internal (AsmCtx_t *ctx, const char *scnname, |
| 276 | GElf_Word type, GElf_Xword flags) |
| 277 | attribute_hidden; |
| 278 | |
| 279 | |
| 280 | /* Internal aliases of the asm_addintXX functions. */ |
| 281 | extern int __asm_addint8_internal (AsmScn_t *asmscn, int8_t num) |
| 282 | attribute_hidden; |
| 283 | extern int __asm_addint16_internal (AsmScn_t *asmscn, int16_t num) |
| 284 | attribute_hidden; |
| 285 | extern int __asm_addint32_internal (AsmScn_t *asmscn, int32_t num) |
| 286 | attribute_hidden; |
| 287 | extern int __asm_addint64_internal (AsmScn_t *asmscn, int64_t num) |
| 288 | attribute_hidden; |
| 289 | |
| 290 | |
Ulrich Drepper | 3cbdd38 | 2008-01-02 17:44:39 +0000 | [diff] [blame] | 291 | /* Produce disassembly output for given memory and output it using the |
| 292 | given callback functions. */ |
| 293 | extern int __disasm_cb_internal (DisasmCtx_t *ctx, const uint8_t **startp, |
| 294 | const uint8_t *end, GElf_Addr addr, |
| 295 | const char *fmt, DisasmOutputCB_t outcb, |
| 296 | void *outcbarp, void *symcbarg) |
| 297 | attribute_hidden; |
| 298 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 299 | |
| 300 | /* Test whether given symbol is an internal symbol and if yes, whether |
| 301 | we should nevertheless emit it in the symbol table. */ |
| 302 | // XXX The second part should probably be controlled by an option which |
| 303 | // isn't implemented yet |
| 304 | // XXX Also, the format will change with the backend. |
| 305 | #define asm_emit_symbol_p(name) (strncmp (name, ".L", 2) != 0) |
| 306 | |
| 307 | #endif /* libasmP.h */ |