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 int_code; 328 unsigned long int_parm_long; 329 }; 330 331 /* 332 * Program event recording (PER) register set. 333 */ 334 struct per_regs { 335 unsigned long control; /* PER control bits */ 336 unsigned long start; /* PER starting address */ 337 unsigned long end; /* PER ending address */ 338 }; 339 340 /* 341 * PER event contains information about the cause of the last PER exception. 342 */ 343 struct per_event { 344 unsigned short cause; /* PER code, ATMID and AI */ 345 unsigned long address; /* PER address */ 346 unsigned char paid; /* PER access identification */ 347 }; 348 349 /* 350 * Simplified per_info structure used to decode the ptrace user space ABI. 351 */ 352 struct per_struct_kernel { 353 unsigned long cr9; /* PER control bits */ 354 unsigned long cr10; /* PER starting address */ 355 unsigned long cr11; /* PER ending address */ 356 unsigned long bits; /* Obsolete software bits */ 357 unsigned long starting_addr; /* User specified start address */ 358 unsigned long ending_addr; /* User specified end address */ 359 unsigned short perc_atmid; /* PER trap ATMID */ 360 unsigned long address; /* PER trap instruction address */ 361 unsigned char access_id; /* PER trap access identification */ 362 }; 363 364 #define PER_EVENT_MASK 0xE9000000UL 365 366 #define PER_EVENT_BRANCH 0x80000000UL 367 #define PER_EVENT_IFETCH 0x40000000UL 368 #define PER_EVENT_STORE 0x20000000UL 369 #define PER_EVENT_STORE_REAL 0x08000000UL 370 #define PER_EVENT_NULLIFICATION 0x01000000UL 371 372 #define PER_CONTROL_MASK 0x00a00000UL 373 374 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL 375 #define PER_CONTROL_ALTERATION 0x00200000UL 376 377 #endif 378 379 /* 380 * Now for the user space program event recording (trace) definitions. 381 * The following structures are used only for the ptrace interface, don't 382 * touch or even look at it if you don't want to modify the user-space 383 * ptrace interface. In particular stay away from it for in-kernel PER. 384 */ 385 typedef struct 386 { 387 unsigned long cr[NUM_CR_WORDS]; 388 } per_cr_words; 389 390 #define PER_EM_MASK 0xE8000000UL 391 392 typedef struct 393 { 394 #ifdef __s390x__ 395 unsigned : 32; 396 #endif /* __s390x__ */ 397 unsigned em_branching : 1; 398 unsigned em_instruction_fetch : 1; 399 /* 400 * Switching on storage alteration automatically fixes 401 * the storage alteration event bit in the users std. 402 */ 403 unsigned em_storage_alteration : 1; 404 unsigned em_gpr_alt_unused : 1; 405 unsigned em_store_real_address : 1; 406 unsigned : 3; 407 unsigned branch_addr_ctl : 1; 408 unsigned : 1; 409 unsigned storage_alt_space_ctl : 1; 410 unsigned : 21; 411 unsigned long starting_addr; 412 unsigned long ending_addr; 413 } per_cr_bits; 414 415 typedef struct 416 { 417 unsigned short perc_atmid; 418 unsigned long address; 419 unsigned char access_id; 420 } per_lowcore_words; 421 422 typedef struct 423 { 424 unsigned perc_branching : 1; 425 unsigned perc_instruction_fetch : 1; 426 unsigned perc_storage_alteration : 1; 427 unsigned perc_gpr_alt_unused : 1; 428 unsigned perc_store_real_address : 1; 429 unsigned : 3; 430 unsigned atmid_psw_bit_31 : 1; 431 unsigned atmid_validity_bit : 1; 432 unsigned atmid_psw_bit_32 : 1; 433 unsigned atmid_psw_bit_5 : 1; 434 unsigned atmid_psw_bit_16 : 1; 435 unsigned atmid_psw_bit_17 : 1; 436 unsigned si : 2; 437 unsigned long address; 438 unsigned : 4; 439 unsigned access_id : 4; 440 } per_lowcore_bits; 441 442 typedef struct 443 { 444 union { 445 per_cr_words words; 446 per_cr_bits bits; 447 } control_regs; 448 /* 449 * Use these flags instead of setting em_instruction_fetch 450 * directly they are used so that single stepping can be 451 * switched on & off while not affecting other tracing 452 */ 453 unsigned single_step : 1; 454 unsigned instruction_fetch : 1; 455 unsigned : 30; 456 /* 457 * These addresses are copied into cr10 & cr11 if single 458 * stepping is switched off 459 */ 460 unsigned long starting_addr; 461 unsigned long ending_addr; 462 union { 463 per_lowcore_words words; 464 per_lowcore_bits bits; 465 } lowcore; 466 } per_struct; 467 468 typedef struct 469 { 470 unsigned int len; 471 unsigned long kernel_addr; 472 unsigned long process_addr; 473 } ptrace_area; 474 475 /* 476 * S/390 specific non posix ptrace requests. I chose unusual values so 477 * they are unlikely to clash with future ptrace definitions. 478 */ 479 #define PTRACE_PEEKUSR_AREA 0x5000 480 #define PTRACE_POKEUSR_AREA 0x5001 481 #define PTRACE_PEEKTEXT_AREA 0x5002 482 #define PTRACE_PEEKDATA_AREA 0x5003 483 #define PTRACE_POKETEXT_AREA 0x5004 484 #define PTRACE_POKEDATA_AREA 0x5005 485 #define PTRACE_GET_LAST_BREAK 0x5006 486 #define PTRACE_PEEK_SYSTEM_CALL 0x5007 487 #define PTRACE_POKE_SYSTEM_CALL 0x5008 488 489 /* 490 * PT_PROT definition is loosely based on hppa bsd definition in 491 * gdb/hppab-nat.c 492 */ 493 #define PTRACE_PROT 21 494 495 typedef enum 496 { 497 ptprot_set_access_watchpoint, 498 ptprot_set_write_watchpoint, 499 ptprot_disable_watchpoint 500 } ptprot_flags; 501 502 typedef struct 503 { 504 unsigned long lowaddr; 505 unsigned long hiaddr; 506 ptprot_flags prot; 507 } ptprot_area; 508 509 /* Sequence of bytes for breakpoint illegal instruction. */ 510 #define S390_BREAKPOINT {0x0,0x1} 511 #define S390_BREAKPOINT_U16 ((__u16)0x0001) 512 #define S390_SYSCALL_OPCODE ((__u16)0x0a00) 513 #define S390_SYSCALL_SIZE 2 514 515 /* 516 * The user_regs_struct defines the way the user registers are 517 * store on the stack for signal handling. 518 */ 519 struct user_regs_struct 520 { 521 psw_t psw; 522 unsigned long gprs[NUM_GPRS]; 523 unsigned int acrs[NUM_ACRS]; 524 unsigned long orig_gpr2; 525 s390_fp_regs fp_regs; 526 /* 527 * These per registers are in here so that gdb can modify them 528 * itself as there is no "official" ptrace interface for hardware 529 * watchpoints. This is the way intel does it. 530 */ 531 per_struct per_info; 532 unsigned long ieee_instruction_pointer; /* obsolete, always 0 */ 533 }; 534 535 #ifdef __KERNEL__ 536 /* 537 * These are defined as per linux/ptrace.h, which see. 538 */ 539 #define arch_has_single_step() (1) 540 541 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) 542 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN) 543 #define user_stack_pointer(regs)((regs)->gprs[15]) 544 #define profile_pc(regs) instruction_pointer(regs) 545 546 static inline long regs_return_value(struct pt_regs *regs) 547 { 548 return regs->gprs[2]; 549 } 550 551 int regs_query_register_offset(const char *name); 552 const char *regs_query_register_name(unsigned int offset); 553 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset); 554 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); 555 556 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 557 { 558 return regs->gprs[15] & PSW_ADDR_INSN; 559 } 560 561 #endif /* __KERNEL__ */ 562 #endif /* __ASSEMBLY__ */ 563 564 #endif /* _S390_PTRACE_H */ 565