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| 1 | /* SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | * |
| 3 | * Copyright (C) 2009 Matt Fleming <matt@console-pimps.org> |
| 4 | */ |
| 5 | #ifndef __ASM_SH_DWARF_H |
| 6 | #define __ASM_SH_DWARF_H |
| 7 | |
| 8 | #ifdef CONFIG_DWARF_UNWINDER |
| 9 | |
| 10 | /* |
| 11 | * DWARF expression operations |
| 12 | */ |
| 13 | #define DW_OP_addr 0x03 |
| 14 | #define DW_OP_deref 0x06 |
| 15 | #define DW_OP_const1u 0x08 |
| 16 | #define DW_OP_const1s 0x09 |
| 17 | #define DW_OP_const2u 0x0a |
| 18 | #define DW_OP_const2s 0x0b |
| 19 | #define DW_OP_const4u 0x0c |
| 20 | #define DW_OP_const4s 0x0d |
| 21 | #define DW_OP_const8u 0x0e |
| 22 | #define DW_OP_const8s 0x0f |
| 23 | #define DW_OP_constu 0x10 |
| 24 | #define DW_OP_consts 0x11 |
| 25 | #define DW_OP_dup 0x12 |
| 26 | #define DW_OP_drop 0x13 |
| 27 | #define DW_OP_over 0x14 |
| 28 | #define DW_OP_pick 0x15 |
| 29 | #define DW_OP_swap 0x16 |
| 30 | #define DW_OP_rot 0x17 |
| 31 | #define DW_OP_xderef 0x18 |
| 32 | #define DW_OP_abs 0x19 |
| 33 | #define DW_OP_and 0x1a |
| 34 | #define DW_OP_div 0x1b |
| 35 | #define DW_OP_minus 0x1c |
| 36 | #define DW_OP_mod 0x1d |
| 37 | #define DW_OP_mul 0x1e |
| 38 | #define DW_OP_neg 0x1f |
| 39 | #define DW_OP_not 0x20 |
| 40 | #define DW_OP_or 0x21 |
| 41 | #define DW_OP_plus 0x22 |
| 42 | #define DW_OP_plus_uconst 0x23 |
| 43 | #define DW_OP_shl 0x24 |
| 44 | #define DW_OP_shr 0x25 |
| 45 | #define DW_OP_shra 0x26 |
| 46 | #define DW_OP_xor 0x27 |
| 47 | #define DW_OP_skip 0x2f |
| 48 | #define DW_OP_bra 0x28 |
| 49 | #define DW_OP_eq 0x29 |
| 50 | #define DW_OP_ge 0x2a |
| 51 | #define DW_OP_gt 0x2b |
| 52 | #define DW_OP_le 0x2c |
| 53 | #define DW_OP_lt 0x2d |
| 54 | #define DW_OP_ne 0x2e |
| 55 | #define DW_OP_lit0 0x30 |
| 56 | #define DW_OP_lit1 0x31 |
| 57 | #define DW_OP_lit2 0x32 |
| 58 | #define DW_OP_lit3 0x33 |
| 59 | #define DW_OP_lit4 0x34 |
| 60 | #define DW_OP_lit5 0x35 |
| 61 | #define DW_OP_lit6 0x36 |
| 62 | #define DW_OP_lit7 0x37 |
| 63 | #define DW_OP_lit8 0x38 |
| 64 | #define DW_OP_lit9 0x39 |
| 65 | #define DW_OP_lit10 0x3a |
| 66 | #define DW_OP_lit11 0x3b |
| 67 | #define DW_OP_lit12 0x3c |
| 68 | #define DW_OP_lit13 0x3d |
| 69 | #define DW_OP_lit14 0x3e |
| 70 | #define DW_OP_lit15 0x3f |
| 71 | #define DW_OP_lit16 0x40 |
| 72 | #define DW_OP_lit17 0x41 |
| 73 | #define DW_OP_lit18 0x42 |
| 74 | #define DW_OP_lit19 0x43 |
| 75 | #define DW_OP_lit20 0x44 |
| 76 | #define DW_OP_lit21 0x45 |
| 77 | #define DW_OP_lit22 0x46 |
| 78 | #define DW_OP_lit23 0x47 |
| 79 | #define DW_OP_lit24 0x48 |
| 80 | #define DW_OP_lit25 0x49 |
| 81 | #define DW_OP_lit26 0x4a |
| 82 | #define DW_OP_lit27 0x4b |
| 83 | #define DW_OP_lit28 0x4c |
| 84 | #define DW_OP_lit29 0x4d |
| 85 | #define DW_OP_lit30 0x4e |
| 86 | #define DW_OP_lit31 0x4f |
| 87 | #define DW_OP_reg0 0x50 |
| 88 | #define DW_OP_reg1 0x51 |
| 89 | #define DW_OP_reg2 0x52 |
| 90 | #define DW_OP_reg3 0x53 |
| 91 | #define DW_OP_reg4 0x54 |
| 92 | #define DW_OP_reg5 0x55 |
| 93 | #define DW_OP_reg6 0x56 |
| 94 | #define DW_OP_reg7 0x57 |
| 95 | #define DW_OP_reg8 0x58 |
| 96 | #define DW_OP_reg9 0x59 |
| 97 | #define DW_OP_reg10 0x5a |
| 98 | #define DW_OP_reg11 0x5b |
| 99 | #define DW_OP_reg12 0x5c |
| 100 | #define DW_OP_reg13 0x5d |
| 101 | #define DW_OP_reg14 0x5e |
| 102 | #define DW_OP_reg15 0x5f |
| 103 | #define DW_OP_reg16 0x60 |
| 104 | #define DW_OP_reg17 0x61 |
| 105 | #define DW_OP_reg18 0x62 |
| 106 | #define DW_OP_reg19 0x63 |
| 107 | #define DW_OP_reg20 0x64 |
| 108 | #define DW_OP_reg21 0x65 |
| 109 | #define DW_OP_reg22 0x66 |
| 110 | #define DW_OP_reg23 0x67 |
| 111 | #define DW_OP_reg24 0x68 |
| 112 | #define DW_OP_reg25 0x69 |
| 113 | #define DW_OP_reg26 0x6a |
| 114 | #define DW_OP_reg27 0x6b |
| 115 | #define DW_OP_reg28 0x6c |
| 116 | #define DW_OP_reg29 0x6d |
| 117 | #define DW_OP_reg30 0x6e |
| 118 | #define DW_OP_reg31 0x6f |
| 119 | #define DW_OP_breg0 0x70 |
| 120 | #define DW_OP_breg1 0x71 |
| 121 | #define DW_OP_breg2 0x72 |
| 122 | #define DW_OP_breg3 0x73 |
| 123 | #define DW_OP_breg4 0x74 |
| 124 | #define DW_OP_breg5 0x75 |
| 125 | #define DW_OP_breg6 0x76 |
| 126 | #define DW_OP_breg7 0x77 |
| 127 | #define DW_OP_breg8 0x78 |
| 128 | #define DW_OP_breg9 0x79 |
| 129 | #define DW_OP_breg10 0x7a |
| 130 | #define DW_OP_breg11 0x7b |
| 131 | #define DW_OP_breg12 0x7c |
| 132 | #define DW_OP_breg13 0x7d |
| 133 | #define DW_OP_breg14 0x7e |
| 134 | #define DW_OP_breg15 0x7f |
| 135 | #define DW_OP_breg16 0x80 |
| 136 | #define DW_OP_breg17 0x81 |
| 137 | #define DW_OP_breg18 0x82 |
| 138 | #define DW_OP_breg19 0x83 |
| 139 | #define DW_OP_breg20 0x84 |
| 140 | #define DW_OP_breg21 0x85 |
| 141 | #define DW_OP_breg22 0x86 |
| 142 | #define DW_OP_breg23 0x87 |
| 143 | #define DW_OP_breg24 0x88 |
| 144 | #define DW_OP_breg25 0x89 |
| 145 | #define DW_OP_breg26 0x8a |
| 146 | #define DW_OP_breg27 0x8b |
| 147 | #define DW_OP_breg28 0x8c |
| 148 | #define DW_OP_breg29 0x8d |
| 149 | #define DW_OP_breg30 0x8e |
| 150 | #define DW_OP_breg31 0x8f |
| 151 | #define DW_OP_regx 0x90 |
| 152 | #define DW_OP_fbreg 0x91 |
| 153 | #define DW_OP_bregx 0x92 |
| 154 | #define DW_OP_piece 0x93 |
| 155 | #define DW_OP_deref_size 0x94 |
| 156 | #define DW_OP_xderef_size 0x95 |
| 157 | #define DW_OP_nop 0x96 |
| 158 | #define DW_OP_push_object_address 0x97 |
| 159 | #define DW_OP_call2 0x98 |
| 160 | #define DW_OP_call4 0x99 |
| 161 | #define DW_OP_call_ref 0x9a |
| 162 | #define DW_OP_form_tls_address 0x9b |
| 163 | #define DW_OP_call_frame_cfa 0x9c |
| 164 | #define DW_OP_bit_piece 0x9d |
| 165 | #define DW_OP_lo_user 0xe0 |
| 166 | #define DW_OP_hi_user 0xff |
| 167 | |
| 168 | /* |
| 169 | * Addresses used in FDE entries in the .eh_frame section may be encoded |
| 170 | * using one of the following encodings. |
| 171 | */ |
| 172 | #define DW_EH_PE_absptr 0x00 |
| 173 | #define DW_EH_PE_omit 0xff |
| 174 | #define DW_EH_PE_uleb128 0x01 |
| 175 | #define DW_EH_PE_udata2 0x02 |
| 176 | #define DW_EH_PE_udata4 0x03 |
| 177 | #define DW_EH_PE_udata8 0x04 |
| 178 | #define DW_EH_PE_sleb128 0x09 |
| 179 | #define DW_EH_PE_sdata2 0x0a |
| 180 | #define DW_EH_PE_sdata4 0x0b |
| 181 | #define DW_EH_PE_sdata8 0x0c |
| 182 | #define DW_EH_PE_signed 0x09 |
| 183 | |
| 184 | #define DW_EH_PE_pcrel 0x10 |
| 185 | |
| 186 | /* |
| 187 | * The architecture-specific register number that contains the return |
| 188 | * address in the .debug_frame table. |
| 189 | */ |
| 190 | #define DWARF_ARCH_RA_REG 17 |
| 191 | |
| 192 | #ifndef __ASSEMBLY__ |
| 193 | |
| 194 | #include <linux/compiler.h> |
| 195 | #include <linux/bug.h> |
| 196 | #include <linux/list.h> |
| 197 | #include <linux/module.h> |
| 198 | |
| 199 | /* |
| 200 | * Read either the frame pointer (r14) or the stack pointer (r15). |
| 201 | * NOTE: this MUST be inlined. |
| 202 | */ |
| 203 | static __always_inline unsigned long dwarf_read_arch_reg(unsigned int reg) |
| 204 | { |
| 205 | unsigned long value = 0; |
| 206 | |
| 207 | switch (reg) { |
| 208 | case 14: |
| 209 | __asm__ __volatile__("mov r14, %0\n" : "=r" (value)); |
| 210 | break; |
| 211 | case 15: |
| 212 | __asm__ __volatile__("mov r15, %0\n" : "=r" (value)); |
| 213 | break; |
| 214 | default: |
| 215 | BUG(); |
| 216 | } |
| 217 | |
| 218 | return value; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * dwarf_cie - Common Information Entry |
| 223 | */ |
| 224 | struct dwarf_cie { |
| 225 | unsigned long length; |
| 226 | unsigned long cie_id; |
| 227 | unsigned char version; |
| 228 | const char *augmentation; |
| 229 | unsigned int code_alignment_factor; |
| 230 | int data_alignment_factor; |
| 231 | |
| 232 | /* Which column in the rule table represents return addr of func. */ |
| 233 | unsigned int return_address_reg; |
| 234 | |
| 235 | unsigned char *initial_instructions; |
| 236 | unsigned char *instructions_end; |
| 237 | |
| 238 | unsigned char encoding; |
| 239 | |
| 240 | unsigned long cie_pointer; |
| 241 | |
| 242 | unsigned long flags; |
| 243 | #define DWARF_CIE_Z_AUGMENTATION (1 << 0) |
| 244 | |
| 245 | /* linked-list entry if this CIE is from a module */ |
| 246 | struct list_head link; |
| 247 | |
| 248 | struct rb_node node; |
| 249 | }; |
| 250 | |
| 251 | /** |
| 252 | * dwarf_fde - Frame Description Entry |
| 253 | */ |
| 254 | struct dwarf_fde { |
| 255 | unsigned long length; |
| 256 | unsigned long cie_pointer; |
| 257 | struct dwarf_cie *cie; |
| 258 | unsigned long initial_location; |
| 259 | unsigned long address_range; |
| 260 | unsigned char *instructions; |
| 261 | unsigned char *end; |
| 262 | |
| 263 | /* linked-list entry if this FDE is from a module */ |
| 264 | struct list_head link; |
| 265 | |
| 266 | struct rb_node node; |
| 267 | }; |
| 268 | |
| 269 | /** |
| 270 | * dwarf_frame - DWARF information for a frame in the call stack |
| 271 | */ |
| 272 | struct dwarf_frame { |
| 273 | struct dwarf_frame *prev, *next; |
| 274 | |
| 275 | unsigned long pc; |
| 276 | |
| 277 | struct list_head reg_list; |
| 278 | |
| 279 | unsigned long cfa; |
| 280 | |
| 281 | /* Valid when DW_FRAME_CFA_REG_OFFSET is set in flags */ |
| 282 | unsigned int cfa_register; |
| 283 | unsigned int cfa_offset; |
| 284 | |
| 285 | /* Valid when DW_FRAME_CFA_REG_EXP is set in flags */ |
| 286 | unsigned char *cfa_expr; |
| 287 | unsigned int cfa_expr_len; |
| 288 | |
| 289 | unsigned long flags; |
| 290 | #define DWARF_FRAME_CFA_REG_OFFSET (1 << 0) |
| 291 | #define DWARF_FRAME_CFA_REG_EXP (1 << 1) |
| 292 | |
| 293 | unsigned long return_addr; |
| 294 | }; |
| 295 | |
| 296 | /** |
| 297 | * dwarf_reg - DWARF register |
| 298 | * @flags: Describes how to calculate the value of this register |
| 299 | */ |
| 300 | struct dwarf_reg { |
| 301 | struct list_head link; |
| 302 | |
| 303 | unsigned int number; |
| 304 | |
| 305 | unsigned long addr; |
| 306 | unsigned long flags; |
| 307 | #define DWARF_REG_OFFSET (1 << 0) |
| 308 | #define DWARF_VAL_OFFSET (1 << 1) |
| 309 | #define DWARF_UNDEFINED (1 << 2) |
| 310 | }; |
| 311 | |
| 312 | /* |
| 313 | * Call Frame instruction opcodes. |
| 314 | */ |
| 315 | #define DW_CFA_advance_loc 0x40 |
| 316 | #define DW_CFA_offset 0x80 |
| 317 | #define DW_CFA_restore 0xc0 |
| 318 | #define DW_CFA_nop 0x00 |
| 319 | #define DW_CFA_set_loc 0x01 |
| 320 | #define DW_CFA_advance_loc1 0x02 |
| 321 | #define DW_CFA_advance_loc2 0x03 |
| 322 | #define DW_CFA_advance_loc4 0x04 |
| 323 | #define DW_CFA_offset_extended 0x05 |
| 324 | #define DW_CFA_restore_extended 0x06 |
| 325 | #define DW_CFA_undefined 0x07 |
| 326 | #define DW_CFA_same_value 0x08 |
| 327 | #define DW_CFA_register 0x09 |
| 328 | #define DW_CFA_remember_state 0x0a |
| 329 | #define DW_CFA_restore_state 0x0b |
| 330 | #define DW_CFA_def_cfa 0x0c |
| 331 | #define DW_CFA_def_cfa_register 0x0d |
| 332 | #define DW_CFA_def_cfa_offset 0x0e |
| 333 | #define DW_CFA_def_cfa_expression 0x0f |
| 334 | #define DW_CFA_expression 0x10 |
| 335 | #define DW_CFA_offset_extended_sf 0x11 |
| 336 | #define DW_CFA_def_cfa_sf 0x12 |
| 337 | #define DW_CFA_def_cfa_offset_sf 0x13 |
| 338 | #define DW_CFA_val_offset 0x14 |
| 339 | #define DW_CFA_val_offset_sf 0x15 |
| 340 | #define DW_CFA_val_expression 0x16 |
| 341 | #define DW_CFA_lo_user 0x1c |
| 342 | #define DW_CFA_hi_user 0x3f |
| 343 | |
| 344 | /* GNU extension opcodes */ |
| 345 | #define DW_CFA_GNU_args_size 0x2e |
| 346 | #define DW_CFA_GNU_negative_offset_extended 0x2f |
| 347 | |
| 348 | /* |
| 349 | * Some call frame instructions encode their operands in the opcode. We |
| 350 | * need some helper functions to extract both the opcode and operands |
| 351 | * from an instruction. |
| 352 | */ |
| 353 | static inline unsigned int DW_CFA_opcode(unsigned long insn) |
| 354 | { |
| 355 | return (insn & 0xc0); |
| 356 | } |
| 357 | |
| 358 | static inline unsigned int DW_CFA_operand(unsigned long insn) |
| 359 | { |
| 360 | return (insn & 0x3f); |
| 361 | } |
| 362 | |
| 363 | #define DW_EH_FRAME_CIE 0 /* .eh_frame CIE IDs are 0 */ |
| 364 | #define DW_CIE_ID 0xffffffff |
| 365 | #define DW64_CIE_ID 0xffffffffffffffffULL |
| 366 | |
| 367 | /* |
| 368 | * DWARF FDE/CIE length field values. |
| 369 | */ |
| 370 | #define DW_EXT_LO 0xfffffff0 |
| 371 | #define DW_EXT_HI 0xffffffff |
| 372 | #define DW_EXT_DWARF64 DW_EXT_HI |
| 373 | |
| 374 | extern struct dwarf_frame *dwarf_unwind_stack(unsigned long, |
| 375 | struct dwarf_frame *); |
| 376 | extern void dwarf_free_frame(struct dwarf_frame *); |
| 377 | |
| 378 | extern int module_dwarf_finalize(const Elf_Ehdr *, const Elf_Shdr *, |
| 379 | struct module *); |
| 380 | extern void module_dwarf_cleanup(struct module *); |
| 381 | |
| 382 | #endif /* !__ASSEMBLY__ */ |
| 383 | |
| 384 | #define CFI_STARTPROC .cfi_startproc |
| 385 | #define CFI_ENDPROC .cfi_endproc |
| 386 | #define CFI_DEF_CFA .cfi_def_cfa |
| 387 | #define CFI_REGISTER .cfi_register |
| 388 | #define CFI_REL_OFFSET .cfi_rel_offset |
| 389 | #define CFI_UNDEFINED .cfi_undefined |
| 390 | |
| 391 | #else |
| 392 | |
| 393 | /* |
| 394 | * Use the asm comment character to ignore the rest of the line. |
| 395 | */ |
| 396 | #define CFI_IGNORE ! |
| 397 | |
| 398 | #define CFI_STARTPROC CFI_IGNORE |
| 399 | #define CFI_ENDPROC CFI_IGNORE |
| 400 | #define CFI_DEF_CFA CFI_IGNORE |
| 401 | #define CFI_REGISTER CFI_IGNORE |
| 402 | #define CFI_REL_OFFSET CFI_IGNORE |
| 403 | #define CFI_UNDEFINED CFI_IGNORE |
| 404 | |
| 405 | #ifndef __ASSEMBLY__ |
| 406 | static inline void dwarf_unwinder_init(void) |
| 407 | { |
| 408 | } |
| 409 | |
| 410 | #define module_dwarf_finalize(hdr, sechdrs, me) (0) |
| 411 | #define module_dwarf_cleanup(mod) do { } while (0) |
| 412 | |
| 413 | #endif |
| 414 | |
| 415 | #endif /* CONFIG_DWARF_UNWINDER */ |
| 416 | |
| 417 | #endif /* __ASM_SH_DWARF_H */ |
| 418 |
Warning: This file is not a C or C++ file. It does not have highlighting.