1 /* 2 * include/asm-s390/ptrace.h 3 * 4 * S390 version 5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation 6 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 7 */ 8 9 #ifndef _S390_PTRACE_H 10 #define _S390_PTRACE_H 11 12 /* 13 * Offsets in the user_regs_struct. They are used for the ptrace 14 * system call and in entry.S 15 */ 16 #ifndef __s390x__ 17 18 #define PT_PSWMASK 0x00 19 #define PT_PSWADDR 0x04 20 #define PT_GPR0 0x08 21 #define PT_GPR1 0x0C 22 #define PT_GPR2 0x10 23 #define PT_GPR3 0x14 24 #define PT_GPR4 0x18 25 #define PT_GPR5 0x1C 26 #define PT_GPR6 0x20 27 #define PT_GPR7 0x24 28 #define PT_GPR8 0x28 29 #define PT_GPR9 0x2C 30 #define PT_GPR10 0x30 31 #define PT_GPR11 0x34 32 #define PT_GPR12 0x38 33 #define PT_GPR13 0x3C 34 #define PT_GPR14 0x40 35 #define PT_GPR15 0x44 36 #define PT_ACR0 0x48 37 #define PT_ACR1 0x4C 38 #define PT_ACR2 0x50 39 #define PT_ACR3 0x54 40 #define PT_ACR4 0x58 41 #define PT_ACR5 0x5C 42 #define PT_ACR6 0x60 43 #define PT_ACR7 0x64 44 #define PT_ACR8 0x68 45 #define PT_ACR9 0x6C 46 #define PT_ACR10 0x70 47 #define PT_ACR11 0x74 48 #define PT_ACR12 0x78 49 #define PT_ACR13 0x7C 50 #define PT_ACR14 0x80 51 #define PT_ACR15 0x84 52 #define PT_ORIGGPR2 0x88 53 #define PT_FPC 0x90 54 /* 55 * A nasty fact of life that the ptrace api 56 * only supports passing of longs. 57 */ 58 #define PT_FPR0_HI 0x98 59 #define PT_FPR0_LO 0x9C 60 #define PT_FPR1_HI 0xA0 61 #define PT_FPR1_LO 0xA4 62 #define PT_FPR2_HI 0xA8 63 #define PT_FPR2_LO 0xAC 64 #define PT_FPR3_HI 0xB0 65 #define PT_FPR3_LO 0xB4 66 #define PT_FPR4_HI 0xB8 67 #define PT_FPR4_LO 0xBC 68 #define PT_FPR5_HI 0xC0 69 #define PT_FPR5_LO 0xC4 70 #define PT_FPR6_HI 0xC8 71 #define PT_FPR6_LO 0xCC 72 #define PT_FPR7_HI 0xD0 73 #define PT_FPR7_LO 0xD4 74 #define PT_FPR8_HI 0xD8 75 #define PT_FPR8_LO 0XDC 76 #define PT_FPR9_HI 0xE0 77 #define PT_FPR9_LO 0xE4 78 #define PT_FPR10_HI 0xE8 79 #define PT_FPR10_LO 0xEC 80 #define PT_FPR11_HI 0xF0 81 #define PT_FPR11_LO 0xF4 82 #define PT_FPR12_HI 0xF8 83 #define PT_FPR12_LO 0xFC 84 #define PT_FPR13_HI 0x100 85 #define PT_FPR13_LO 0x104 86 #define PT_FPR14_HI 0x108 87 #define PT_FPR14_LO 0x10C 88 #define PT_FPR15_HI 0x110 89 #define PT_FPR15_LO 0x114 90 #define PT_CR_9 0x118 91 #define PT_CR_10 0x11C 92 #define PT_CR_11 0x120 93 #define PT_IEEE_IP 0x13C 94 #define PT_LASTOFF PT_IEEE_IP 95 #define PT_ENDREGS 0x140-1 96 97 #define GPR_SIZE 4 98 #define CR_SIZE 4 99 100 #define STACK_FRAME_OVERHEAD 96 /* size of minimum stack frame */ 101 102 #else /* __s390x__ */ 103 104 #define PT_PSWMASK 0x00 105 #define PT_PSWADDR 0x08 106 #define PT_GPR0 0x10 107 #define PT_GPR1 0x18 108 #define PT_GPR2 0x20 109 #define PT_GPR3 0x28 110 #define PT_GPR4 0x30 111 #define PT_GPR5 0x38 112 #define PT_GPR6 0x40 113 #define PT_GPR7 0x48 114 #define PT_GPR8 0x50 115 #define PT_GPR9 0x58 116 #define PT_GPR10 0x60 117 #define PT_GPR11 0x68 118 #define PT_GPR12 0x70 119 #define PT_GPR13 0x78 120 #define PT_GPR14 0x80 121 #define PT_GPR15 0x88 122 #define PT_ACR0 0x90 123 #define PT_ACR1 0x94 124 #define PT_ACR2 0x98 125 #define PT_ACR3 0x9C 126 #define PT_ACR4 0xA0 127 #define PT_ACR5 0xA4 128 #define PT_ACR6 0xA8 129 #define PT_ACR7 0xAC 130 #define PT_ACR8 0xB0 131 #define PT_ACR9 0xB4 132 #define PT_ACR10 0xB8 133 #define PT_ACR11 0xBC 134 #define PT_ACR12 0xC0 135 #define PT_ACR13 0xC4 136 #define PT_ACR14 0xC8 137 #define PT_ACR15 0xCC 138 #define PT_ORIGGPR2 0xD0 139 #define PT_FPC 0xD8 140 #define PT_FPR0 0xE0 141 #define PT_FPR1 0xE8 142 #define PT_FPR2 0xF0 143 #define PT_FPR3 0xF8 144 #define PT_FPR4 0x100 145 #define PT_FPR5 0x108 146 #define PT_FPR6 0x110 147 #define PT_FPR7 0x118 148 #define PT_FPR8 0x120 149 #define PT_FPR9 0x128 150 #define PT_FPR10 0x130 151 #define PT_FPR11 0x138 152 #define PT_FPR12 0x140 153 #define PT_FPR13 0x148 154 #define PT_FPR14 0x150 155 #define PT_FPR15 0x158 156 #define PT_CR_9 0x160 157 #define PT_CR_10 0x168 158 #define PT_CR_11 0x170 159 #define PT_IEEE_IP 0x1A8 160 #define PT_LASTOFF PT_IEEE_IP 161 #define PT_ENDREGS 0x1B0-1 162 163 #define GPR_SIZE 8 164 #define CR_SIZE 8 165 166 #define STACK_FRAME_OVERHEAD 160 /* size of minimum stack frame */ 167 168 #endif /* __s390x__ */ 169 170 #define NUM_GPRS 16 171 #define NUM_FPRS 16 172 #define NUM_CRS 16 173 #define NUM_ACRS 16 174 175 #define NUM_CR_WORDS 3 176 177 #define FPR_SIZE 8 178 #define FPC_SIZE 4 179 #define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */ 180 #define ACR_SIZE 4 181 182 183 #define PTRACE_OLDSETOPTIONS 21 184 185 #ifndef __ASSEMBLY__ 186 #include <linux/stddef.h> 187 #include <linux/types.h> 188 189 typedef union 190 { 191 float f; 192 double d; 193 __u64 ui; 194 struct 195 { 196 __u32 hi; 197 __u32 lo; 198 } fp; 199 } freg_t; 200 201 typedef struct 202 { 203 __u32 fpc; 204 freg_t fprs[NUM_FPRS]; 205 } s390_fp_regs; 206 207 #define FPC_EXCEPTION_MASK 0xF8000000 208 #define FPC_FLAGS_MASK 0x00F80000 209 #define FPC_DXC_MASK 0x0000FF00 210 #define FPC_RM_MASK 0x00000003 211 #define FPC_VALID_MASK 0xF8F8FF03 212 213 /* this typedef defines how a Program Status Word looks like */ 214 typedef struct 215 { 216 unsigned long mask; 217 unsigned long addr; 218 } __attribute__ ((aligned(8))) psw_t; 219 220 typedef struct 221 { 222 __u32 mask; 223 __u32 addr; 224 } __attribute__ ((aligned(8))) psw_compat_t; 225 226 #ifndef __s390x__ 227 228 #define PSW_MASK_PER 0x40000000UL 229 #define PSW_MASK_DAT 0x04000000UL 230 #define PSW_MASK_IO 0x02000000UL 231 #define PSW_MASK_EXT 0x01000000UL 232 #define PSW_MASK_KEY 0x00F00000UL 233 #define PSW_MASK_BASE 0x00080000UL /* always one */ 234 #define PSW_MASK_MCHECK 0x00040000UL 235 #define PSW_MASK_WAIT 0x00020000UL 236 #define PSW_MASK_PSTATE 0x00010000UL 237 #define PSW_MASK_ASC 0x0000C000UL 238 #define PSW_MASK_CC 0x00003000UL 239 #define PSW_MASK_PM 0x00000F00UL 240 #define PSW_MASK_EA 0x00000000UL 241 #define PSW_MASK_BA 0x00000000UL 242 243 #define PSW_MASK_USER 0x00003F00UL 244 245 #define PSW_ADDR_AMODE 0x80000000UL 246 #define PSW_ADDR_INSN 0x7FFFFFFFUL 247 248 #define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 20) 249 250 #define PSW_ASC_PRIMARY 0x00000000UL 251 #define PSW_ASC_ACCREG 0x00004000UL 252 #define PSW_ASC_SECONDARY 0x00008000UL 253 #define PSW_ASC_HOME 0x0000C000UL 254 255 #else /* __s390x__ */ 256 257 #define PSW_MASK_PER 0x4000000000000000UL 258 #define PSW_MASK_DAT 0x0400000000000000UL 259 #define PSW_MASK_IO 0x0200000000000000UL 260 #define PSW_MASK_EXT 0x0100000000000000UL 261 #define PSW_MASK_BASE 0x0000000000000000UL 262 #define PSW_MASK_KEY 0x00F0000000000000UL 263 #define PSW_MASK_MCHECK 0x0004000000000000UL 264 #define PSW_MASK_WAIT 0x0002000000000000UL 265 #define PSW_MASK_PSTATE 0x0001000000000000UL 266 #define PSW_MASK_ASC 0x0000C00000000000UL 267 #define PSW_MASK_CC 0x0000300000000000UL 268 #define PSW_MASK_PM 0x00000F0000000000UL 269 #define PSW_MASK_EA 0x0000000100000000UL 270 #define PSW_MASK_BA 0x0000000080000000UL 271 272 #define PSW_MASK_USER 0x00003F0180000000UL 273 274 #define PSW_ADDR_AMODE 0x0000000000000000UL 275 #define PSW_ADDR_INSN 0xFFFFFFFFFFFFFFFFUL 276 277 #define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 52) 278 279 #define PSW_ASC_PRIMARY 0x0000000000000000UL 280 #define PSW_ASC_ACCREG 0x0000400000000000UL 281 #define PSW_ASC_SECONDARY 0x0000800000000000UL 282 #define PSW_ASC_HOME 0x0000C00000000000UL 283 284 #endif /* __s390x__ */ 285 286 #ifdef __KERNEL__ 287 extern long psw_kernel_bits; 288 extern long psw_user_bits; 289 #endif 290 291 /* 292 * The s390_regs structure is used to define the elf_gregset_t. 293 */ 294 typedef struct 295 { 296 psw_t psw; 297 unsigned long gprs[NUM_GPRS]; 298 unsigned int acrs[NUM_ACRS]; 299 unsigned long orig_gpr2; 300 } s390_regs; 301 302 typedef struct 303 { 304 psw_compat_t psw; 305 __u32 gprs[NUM_GPRS]; 306 __u32 acrs[NUM_ACRS]; 307 __u32 orig_gpr2; 308 } s390_compat_regs; 309 310 typedef struct 311 { 312 __u32 gprs_high[NUM_GPRS]; 313 } s390_compat_regs_high; 314 315 #ifdef __KERNEL__ 316 317 /* 318 * The pt_regs struct defines the way the registers are stored on 319 * the stack during a system call. 320 */ 321 struct pt_regs 322 { 323 unsigned long args[1]; 324 psw_t psw; 325 unsigned long gprs[NUM_GPRS]; 326 unsigned long orig_gpr2; 327 unsigned int svc_code; 328 }; 329 330 /* 331 * Program event recording (PER) register set. 332 */ 333 struct per_regs { 334 unsigned long control; /* PER control bits */ 335 unsigned long start; /* PER starting address */ 336 unsigned long end; /* PER ending address */ 337 }; 338 339 /* 340 * PER event contains information about the cause of the last PER exception. 341 */ 342 struct per_event { 343 unsigned short cause; /* PER code, ATMID and AI */ 344 unsigned long address; /* PER address */ 345 unsigned char paid; /* PER access identification */ 346 }; 347 348 /* 349 * Simplified per_info structure used to decode the ptrace user space ABI. 350 */ 351 struct per_struct_kernel { 352 unsigned long cr9; /* PER control bits */ 353 unsigned long cr10; /* PER starting address */ 354 unsigned long cr11; /* PER ending address */ 355 unsigned long bits; /* Obsolete software bits */ 356 unsigned long starting_addr; /* User specified start address */ 357 unsigned long ending_addr; /* User specified end address */ 358 unsigned short perc_atmid; /* PER trap ATMID */ 359 unsigned long address; /* PER trap instruction address */ 360 unsigned char access_id; /* PER trap access identification */ 361 }; 362 363 #define PER_EVENT_MASK 0xE9000000UL 364 365 #define PER_EVENT_BRANCH 0x80000000UL 366 #define PER_EVENT_IFETCH 0x40000000UL 367 #define PER_EVENT_STORE 0x20000000UL 368 #define PER_EVENT_STORE_REAL 0x08000000UL 369 #define PER_EVENT_NULLIFICATION 0x01000000UL 370 371 #define PER_CONTROL_MASK 0x00a00000UL 372 373 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL 374 #define PER_CONTROL_ALTERATION 0x00200000UL 375 376 #endif 377 378 /* 379 * Now for the user space program event recording (trace) definitions. 380 * The following structures are used only for the ptrace interface, don't 381 * touch or even look at it if you don't want to modify the user-space 382 * ptrace interface. In particular stay away from it for in-kernel PER. 383 */ 384 typedef struct 385 { 386 unsigned long cr[NUM_CR_WORDS]; 387 } per_cr_words; 388 389 #define PER_EM_MASK 0xE8000000UL 390 391 typedef struct 392 { 393 #ifdef __s390x__ 394 unsigned : 32; 395 #endif /* __s390x__ */ 396 unsigned em_branching : 1; 397 unsigned em_instruction_fetch : 1; 398 /* 399 * Switching on storage alteration automatically fixes 400 * the storage alteration event bit in the users std. 401 */ 402 unsigned em_storage_alteration : 1; 403 unsigned em_gpr_alt_unused : 1; 404 unsigned em_store_real_address : 1; 405 unsigned : 3; 406 unsigned branch_addr_ctl : 1; 407 unsigned : 1; 408 unsigned storage_alt_space_ctl : 1; 409 unsigned : 21; 410 unsigned long starting_addr; 411 unsigned long ending_addr; 412 } per_cr_bits; 413 414 typedef struct 415 { 416 unsigned short perc_atmid; 417 unsigned long address; 418 unsigned char access_id; 419 } per_lowcore_words; 420 421 typedef struct 422 { 423 unsigned perc_branching : 1; 424 unsigned perc_instruction_fetch : 1; 425 unsigned perc_storage_alteration : 1; 426 unsigned perc_gpr_alt_unused : 1; 427 unsigned perc_store_real_address : 1; 428 unsigned : 3; 429 unsigned atmid_psw_bit_31 : 1; 430 unsigned atmid_validity_bit : 1; 431 unsigned atmid_psw_bit_32 : 1; 432 unsigned atmid_psw_bit_5 : 1; 433 unsigned atmid_psw_bit_16 : 1; 434 unsigned atmid_psw_bit_17 : 1; 435 unsigned si : 2; 436 unsigned long address; 437 unsigned : 4; 438 unsigned access_id : 4; 439 } per_lowcore_bits; 440 441 typedef struct 442 { 443 union { 444 per_cr_words words; 445 per_cr_bits bits; 446 } control_regs; 447 /* 448 * Use these flags instead of setting em_instruction_fetch 449 * directly they are used so that single stepping can be 450 * switched on & off while not affecting other tracing 451 */ 452 unsigned single_step : 1; 453 unsigned instruction_fetch : 1; 454 unsigned : 30; 455 /* 456 * These addresses are copied into cr10 & cr11 if single 457 * stepping is switched off 458 */ 459 unsigned long starting_addr; 460 unsigned long ending_addr; 461 union { 462 per_lowcore_words words; 463 per_lowcore_bits bits; 464 } lowcore; 465 } per_struct; 466 467 typedef struct 468 { 469 unsigned int len; 470 unsigned long kernel_addr; 471 unsigned long process_addr; 472 } ptrace_area; 473 474 /* 475 * S/390 specific non posix ptrace requests. I chose unusual values so 476 * they are unlikely to clash with future ptrace definitions. 477 */ 478 #define PTRACE_PEEKUSR_AREA 0x5000 479 #define PTRACE_POKEUSR_AREA 0x5001 480 #define PTRACE_PEEKTEXT_AREA 0x5002 481 #define PTRACE_PEEKDATA_AREA 0x5003 482 #define PTRACE_POKETEXT_AREA 0x5004 483 #define PTRACE_POKEDATA_AREA 0x5005 484 #define PTRACE_GET_LAST_BREAK 0x5006 485 #define PTRACE_PEEK_SYSTEM_CALL 0x5007 486 #define PTRACE_POKE_SYSTEM_CALL 0x5008 487 488 /* 489 * PT_PROT definition is loosely based on hppa bsd definition in 490 * gdb/hppab-nat.c 491 */ 492 #define PTRACE_PROT 21 493 494 typedef enum 495 { 496 ptprot_set_access_watchpoint, 497 ptprot_set_write_watchpoint, 498 ptprot_disable_watchpoint 499 } ptprot_flags; 500 501 typedef struct 502 { 503 unsigned long lowaddr; 504 unsigned long hiaddr; 505 ptprot_flags prot; 506 } ptprot_area; 507 508 /* Sequence of bytes for breakpoint illegal instruction. */ 509 #define S390_BREAKPOINT {0x0,0x1} 510 #define S390_BREAKPOINT_U16 ((__u16)0x0001) 511 #define S390_SYSCALL_OPCODE ((__u16)0x0a00) 512 #define S390_SYSCALL_SIZE 2 513 514 /* 515 * The user_regs_struct defines the way the user registers are 516 * store on the stack for signal handling. 517 */ 518 struct user_regs_struct 519 { 520 psw_t psw; 521 unsigned long gprs[NUM_GPRS]; 522 unsigned int acrs[NUM_ACRS]; 523 unsigned long orig_gpr2; 524 s390_fp_regs fp_regs; 525 /* 526 * These per registers are in here so that gdb can modify them 527 * itself as there is no "official" ptrace interface for hardware 528 * watchpoints. This is the way intel does it. 529 */ 530 per_struct per_info; 531 unsigned long ieee_instruction_pointer; /* obsolete, always 0 */ 532 }; 533 534 #ifdef __KERNEL__ 535 /* 536 * These are defined as per linux/ptrace.h, which see. 537 */ 538 #define arch_has_single_step() (1) 539 540 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) 541 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN) 542 #define user_stack_pointer(regs)((regs)->gprs[15]) 543 #define regs_return_value(regs)((regs)->gprs[2]) 544 #define profile_pc(regs) instruction_pointer(regs) 545 546 int regs_query_register_offset(const char *name); 547 const char *regs_query_register_name(unsigned int offset); 548 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset); 549 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); 550 551 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 552 { 553 return regs->gprs[15] & PSW_ADDR_INSN; 554 } 555 556 #endif /* __KERNEL__ */ 557 #endif /* __ASSEMBLY__ */ 558 559 #endif /* _S390_PTRACE_H */ 560