arch/s390/include/asm/ptrace.h

   1 /*
   2  *  S390 version
   3  *    Copyright IBM Corp. 1999, 2000
   4  *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
   5  */
   6
   7 #ifndef _S390_PTRACE_H
   8 #define _S390_PTRACE_H
   9
  10 /*
  11  * Offsets in the user_regs_struct. They are used for the ptrace
  12  * system call and in entry.S
  13  */
  14 #ifndef __s390x__
  15
  16 #define PT_PSWMASK  0x00
  17 #define PT_PSWADDR  0x04
  18 #define PT_GPR0     0x08
  19 #define PT_GPR1     0x0C
  20 #define PT_GPR2     0x10
  21 #define PT_GPR3     0x14
  22 #define PT_GPR4     0x18
  23 #define PT_GPR5     0x1C
  24 #define PT_GPR6     0x20
  25 #define PT_GPR7     0x24
  26 #define PT_GPR8     0x28
  27 #define PT_GPR9     0x2C
  28 #define PT_GPR10    0x30
  29 #define PT_GPR11    0x34
  30 #define PT_GPR12    0x38
  31 #define PT_GPR13    0x3C
  32 #define PT_GPR14    0x40
  33 #define PT_GPR15    0x44
  34 #define PT_ACR0     0x48
  35 #define PT_ACR1     0x4C
  36 #define PT_ACR2     0x50
  37 #define PT_ACR3     0x54
  38 #define PT_ACR4     0x58
  39 #define PT_ACR5     0x5C
  40 #define PT_ACR6     0x60
  41 #define PT_ACR7     0x64
  42 #define PT_ACR8     0x68
  43 #define PT_ACR9     0x6C
  44 #define PT_ACR10    0x70
  45 #define PT_ACR11    0x74
  46 #define PT_ACR12    0x78
  47 #define PT_ACR13    0x7C
  48 #define PT_ACR14    0x80
  49 #define PT_ACR15    0x84
  50 #define PT_ORIGGPR2 0x88
  51 #define PT_FPC      0x90
  52 /*
  53  * A nasty fact of life that the ptrace api
  54  * only supports passing of longs.
  55  */
  56 #define PT_FPR0_HI  0x98
  57 #define PT_FPR0_LO  0x9C
  58 #define PT_FPR1_HI  0xA0
  59 #define PT_FPR1_LO  0xA4
  60 #define PT_FPR2_HI  0xA8
  61 #define PT_FPR2_LO  0xAC
  62 #define PT_FPR3_HI  0xB0
  63 #define PT_FPR3_LO  0xB4
  64 #define PT_FPR4_HI  0xB8
  65 #define PT_FPR4_LO  0xBC
  66 #define PT_FPR5_HI  0xC0
  67 #define PT_FPR5_LO  0xC4
  68 #define PT_FPR6_HI  0xC8
  69 #define PT_FPR6_LO  0xCC
  70 #define PT_FPR7_HI  0xD0
  71 #define PT_FPR7_LO  0xD4
  72 #define PT_FPR8_HI  0xD8
  73 #define PT_FPR8_LO  0XDC
  74 #define PT_FPR9_HI  0xE0
  75 #define PT_FPR9_LO  0xE4
  76 #define PT_FPR10_HI 0xE8
  77 #define PT_FPR10_LO 0xEC
  78 #define PT_FPR11_HI 0xF0
  79 #define PT_FPR11_LO 0xF4
  80 #define PT_FPR12_HI 0xF8
  81 #define PT_FPR12_LO 0xFC
  82 #define PT_FPR13_HI 0x100
  83 #define PT_FPR13_LO 0x104
  84 #define PT_FPR14_HI 0x108
  85 #define PT_FPR14_LO 0x10C
  86 #define PT_FPR15_HI 0x110
  87 #define PT_FPR15_LO 0x114
  88 #define PT_CR_9     0x118
  89 #define PT_CR_10    0x11C
  90 #define PT_CR_11    0x120
  91 #define PT_IEEE_IP  0x13C
  92 #define PT_LASTOFF  PT_IEEE_IP
  93 #define PT_ENDREGS  0x140-1
  94
  95 #define GPR_SIZE        4
  96 #define CR_SIZE         4
  97
  98 #define STACK_FRAME_OVERHEAD    96      /* size of minimum stack frame */
  99
 100 #else /* __s390x__ */
 101
 102 #define PT_PSWMASK  0x00
 103 #define PT_PSWADDR  0x08
 104 #define PT_GPR0     0x10
 105 #define PT_GPR1     0x18
 106 #define PT_GPR2     0x20
 107 #define PT_GPR3     0x28
 108 #define PT_GPR4     0x30
 109 #define PT_GPR5     0x38
 110 #define PT_GPR6     0x40
 111 #define PT_GPR7     0x48
 112 #define PT_GPR8     0x50
 113 #define PT_GPR9     0x58
 114 #define PT_GPR10    0x60
 115 #define PT_GPR11    0x68
 116 #define PT_GPR12    0x70
 117 #define PT_GPR13    0x78
 118 #define PT_GPR14    0x80
 119 #define PT_GPR15    0x88
 120 #define PT_ACR0     0x90
 121 #define PT_ACR1     0x94
 122 #define PT_ACR2     0x98
 123 #define PT_ACR3     0x9C
 124 #define PT_ACR4     0xA0
 125 #define PT_ACR5     0xA4
 126 #define PT_ACR6     0xA8
 127 #define PT_ACR7     0xAC
 128 #define PT_ACR8     0xB0
 129 #define PT_ACR9     0xB4
 130 #define PT_ACR10    0xB8
 131 #define PT_ACR11    0xBC
 132 #define PT_ACR12    0xC0
 133 #define PT_ACR13    0xC4
 134 #define PT_ACR14    0xC8
 135 #define PT_ACR15    0xCC
 136 #define PT_ORIGGPR2 0xD0
 137 #define PT_FPC      0xD8
 138 #define PT_FPR0     0xE0
 139 #define PT_FPR1     0xE8
 140 #define PT_FPR2     0xF0
 141 #define PT_FPR3     0xF8
 142 #define PT_FPR4     0x100
 143 #define PT_FPR5     0x108
 144 #define PT_FPR6     0x110
 145 #define PT_FPR7     0x118
 146 #define PT_FPR8     0x120
 147 #define PT_FPR9     0x128
 148 #define PT_FPR10    0x130
 149 #define PT_FPR11    0x138
 150 #define PT_FPR12    0x140
 151 #define PT_FPR13    0x148
 152 #define PT_FPR14    0x150
 153 #define PT_FPR15    0x158
 154 #define PT_CR_9     0x160
 155 #define PT_CR_10    0x168
 156 #define PT_CR_11    0x170
 157 #define PT_IEEE_IP  0x1A8
 158 #define PT_LASTOFF  PT_IEEE_IP
 159 #define PT_ENDREGS  0x1B0-1
 160
 161 #define GPR_SIZE        8
 162 #define CR_SIZE         8
 163
 164 #define STACK_FRAME_OVERHEAD    160      /* size of minimum stack frame */
 165
 166 #endif /* __s390x__ */
 167
 168 #define NUM_GPRS        16
 169 #define NUM_FPRS        16
 170 #define NUM_CRS         16
 171 #define NUM_ACRS        16
 172
 173 #define NUM_CR_WORDS    3
 174
 175 #define FPR_SIZE        8
 176 #define FPC_SIZE        4
 177 #define FPC_PAD_SIZE    4 /* gcc insists on aligning the fpregs */
 178 #define ACR_SIZE        4
 179
 180
 181 #define PTRACE_OLDSETOPTIONS         21
 182
 183 #ifndef __ASSEMBLY__
 184 #include <linux/stddef.h>
 185 #include <linux/types.h>
 186
 187 typedef union
 188 {
 189         float   f;
 190         double  d;
 191         __u64   ui;
 192         struct
 193         {
 194                 __u32 hi;
 195                 __u32 lo;
 196         } fp;
 197 } freg_t;
 198
 199 typedef struct
 200 {
 201         __u32   fpc;
 202         freg_t  fprs[NUM_FPRS];
 203 } s390_fp_regs;
 204
 205 #define FPC_EXCEPTION_MASK      0xF8000000
 206 #define FPC_FLAGS_MASK          0x00F80000
 207 #define FPC_DXC_MASK            0x0000FF00
 208 #define FPC_RM_MASK             0x00000003
 209 #define FPC_VALID_MASK          0xF8F8FF03
 210
 211 /* this typedef defines how a Program Status Word looks like */
 212 typedef struct
 213 {
 214         unsigned long mask;
 215         unsigned long addr;
 216 } __attribute__ ((aligned(8))) psw_t;
 217
 218 typedef struct
 219 {
 220         __u32   mask;
 221         __u32   addr;
 222 } __attribute__ ((aligned(8))) psw_compat_t;
 223
 224 #ifndef __s390x__
 225
 226 #define PSW_MASK_PER            0x40000000UL
 227 #define PSW_MASK_DAT            0x04000000UL
 228 #define PSW_MASK_IO             0x02000000UL
 229 #define PSW_MASK_EXT            0x01000000UL
 230 #define PSW_MASK_KEY            0x00F00000UL
 231 #define PSW_MASK_BASE           0x00080000UL    /* always one */
 232 #define PSW_MASK_MCHECK         0x00040000UL
 233 #define PSW_MASK_WAIT           0x00020000UL
 234 #define PSW_MASK_PSTATE         0x00010000UL
 235 #define PSW_MASK_ASC            0x0000C000UL
 236 #define PSW_MASK_CC             0x00003000UL
 237 #define PSW_MASK_PM             0x00000F00UL
 238 #define PSW_MASK_EA             0x00000000UL
 239 #define PSW_MASK_BA             0x00000000UL
 240
 241 #define PSW_MASK_USER           0x00003F00UL
 242
 243 #define PSW_ADDR_AMODE          0x80000000UL
 244 #define PSW_ADDR_INSN           0x7FFFFFFFUL
 245
 246 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 20)
 247
 248 #define PSW_ASC_PRIMARY         0x00000000UL
 249 #define PSW_ASC_ACCREG          0x00004000UL
 250 #define PSW_ASC_SECONDARY       0x00008000UL
 251 #define PSW_ASC_HOME            0x0000C000UL
 252
 253 #else /* __s390x__ */
 254
 255 #define PSW_MASK_PER            0x4000000000000000UL
 256 #define PSW_MASK_DAT            0x0400000000000000UL
 257 #define PSW_MASK_IO             0x0200000000000000UL
 258 #define PSW_MASK_EXT            0x0100000000000000UL
 259 #define PSW_MASK_BASE           0x0000000000000000UL
 260 #define PSW_MASK_KEY            0x00F0000000000000UL
 261 #define PSW_MASK_MCHECK         0x0004000000000000UL
 262 #define PSW_MASK_WAIT           0x0002000000000000UL
 263 #define PSW_MASK_PSTATE         0x0001000000000000UL
 264 #define PSW_MASK_ASC            0x0000C00000000000UL
 265 #define PSW_MASK_CC             0x0000300000000000UL
 266 #define PSW_MASK_PM             0x00000F0000000000UL
 267 #define PSW_MASK_EA             0x0000000100000000UL
 268 #define PSW_MASK_BA             0x0000000080000000UL
 269
 270 #define PSW_MASK_USER           0x00003F0180000000UL
 271
 272 #define PSW_ADDR_AMODE          0x0000000000000000UL
 273 #define PSW_ADDR_INSN           0xFFFFFFFFFFFFFFFFUL
 274
 275 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 52)
 276
 277 #define PSW_ASC_PRIMARY         0x0000000000000000UL
 278 #define PSW_ASC_ACCREG          0x0000400000000000UL
 279 #define PSW_ASC_SECONDARY       0x0000800000000000UL
 280 #define PSW_ASC_HOME            0x0000C00000000000UL
 281
 282 #endif /* __s390x__ */
 283
 284 #ifdef __KERNEL__
 285 extern long psw_kernel_bits;
 286 extern long psw_user_bits;
 287 #endif
 288
 289 /*
 290  * The s390_regs structure is used to define the elf_gregset_t.
 291  */
 292 typedef struct
 293 {
 294         psw_t psw;
 295         unsigned long gprs[NUM_GPRS];
 296         unsigned int  acrs[NUM_ACRS];
 297         unsigned long orig_gpr2;
 298 } s390_regs;
 299
 300 typedef struct
 301 {
 302         psw_compat_t    psw;
 303         __u32           gprs[NUM_GPRS];
 304         __u32           acrs[NUM_ACRS];
 305         __u32           orig_gpr2;
 306 } s390_compat_regs;
 307
 308 typedef struct
 309 {
 310         __u32           gprs_high[NUM_GPRS];
 311 } s390_compat_regs_high;
 312
 313 #ifdef __KERNEL__
 314
 315 /*
 316  * The pt_regs struct defines the way the registers are stored on
 317  * the stack during a system call.
 318  */
 319 struct pt_regs
 320 {
 321         unsigned long args[1];
 322         psw_t psw;
 323         unsigned long gprs[NUM_GPRS];
 324         unsigned long orig_gpr2;
 325         unsigned int int_code;
 326         unsigned long int_parm_long;
 327 };
 328
 329 /*
 330  * Program event recording (PER) register set.
 331  */
 332 struct per_regs {
 333         unsigned long control;          /* PER control bits */
 334         unsigned long start;            /* PER starting address */
 335         unsigned long end;              /* PER ending address */
 336 };
 337
 338 /*
 339  * PER event contains information about the cause of the last PER exception.
 340  */
 341 struct per_event {
 342         unsigned short cause;           /* PER code, ATMID and AI */
 343         unsigned long address;          /* PER address */
 344         unsigned char paid;             /* PER access identification */
 345 };
 346
 347 /*
 348  * Simplified per_info structure used to decode the ptrace user space ABI.
 349  */
 350 struct per_struct_kernel {
 351         unsigned long cr9;              /* PER control bits */
 352         unsigned long cr10;             /* PER starting address */
 353         unsigned long cr11;             /* PER ending address */
 354         unsigned long bits;             /* Obsolete software bits */
 355         unsigned long starting_addr;    /* User specified start address */
 356         unsigned long ending_addr;      /* User specified end address */
 357         unsigned short perc_atmid;      /* PER trap ATMID */
 358         unsigned long address;          /* PER trap instruction address */
 359         unsigned char access_id;        /* PER trap access identification */
 360 };
 361
 362 #define PER_EVENT_MASK                  0xE9000000UL
 363
 364 #define PER_EVENT_BRANCH                0x80000000UL
 365 #define PER_EVENT_IFETCH                0x40000000UL
 366 #define PER_EVENT_STORE                 0x20000000UL
 367 #define PER_EVENT_STORE_REAL            0x08000000UL
 368 #define PER_EVENT_NULLIFICATION         0x01000000UL
 369
 370 #define PER_CONTROL_MASK                0x00a00000UL
 371
 372 #define PER_CONTROL_BRANCH_ADDRESS      0x00800000UL
 373 #define PER_CONTROL_ALTERATION          0x00200000UL
 374
 375 #endif
 376
 377 /*
 378  * Now for the user space program event recording (trace) definitions.
 379  * The following structures are used only for the ptrace interface, don't
 380  * touch or even look at it if you don't want to modify the user-space
 381  * ptrace interface. In particular stay away from it for in-kernel PER.
 382  */
 383 typedef struct
 384 {
 385         unsigned long cr[NUM_CR_WORDS];
 386 } per_cr_words;
 387
 388 #define PER_EM_MASK 0xE8000000UL
 389
 390 typedef struct
 391 {
 392 #ifdef __s390x__
 393         unsigned                       : 32;
 394 #endif /* __s390x__ */
 395         unsigned em_branching          : 1;
 396         unsigned em_instruction_fetch  : 1;
 397         /*
 398          * Switching on storage alteration automatically fixes
 399          * the storage alteration event bit in the users std.
 400          */
 401         unsigned em_storage_alteration : 1;
 402         unsigned em_gpr_alt_unused     : 1;
 403         unsigned em_store_real_address : 1;
 404         unsigned                       : 3;
 405         unsigned branch_addr_ctl       : 1;
 406         unsigned                       : 1;
 407         unsigned storage_alt_space_ctl : 1;
 408         unsigned                       : 21;
 409         unsigned long starting_addr;
 410         unsigned long ending_addr;
 411 } per_cr_bits;
 412
 413 typedef struct
 414 {
 415         unsigned short perc_atmid;
 416         unsigned long address;
 417         unsigned char access_id;
 418 } per_lowcore_words;
 419
 420 typedef struct
 421 {
 422         unsigned perc_branching          : 1;
 423         unsigned perc_instruction_fetch  : 1;
 424         unsigned perc_storage_alteration : 1;
 425         unsigned perc_gpr_alt_unused     : 1;
 426         unsigned perc_store_real_address : 1;
 427         unsigned                         : 3;
 428         unsigned atmid_psw_bit_31        : 1;
 429         unsigned atmid_validity_bit      : 1;
 430         unsigned atmid_psw_bit_32        : 1;
 431         unsigned atmid_psw_bit_5         : 1;
 432         unsigned atmid_psw_bit_16        : 1;
 433         unsigned atmid_psw_bit_17        : 1;
 434         unsigned si                      : 2;
 435         unsigned long address;
 436         unsigned                         : 4;
 437         unsigned access_id               : 4;
 438 } per_lowcore_bits;
 439
 440 typedef struct
 441 {
 442         union {
 443                 per_cr_words   words;
 444                 per_cr_bits    bits;
 445         } control_regs;
 446         /*
 447          * Use these flags instead of setting em_instruction_fetch
 448          * directly they are used so that single stepping can be
 449          * switched on & off while not affecting other tracing
 450          */
 451         unsigned  single_step       : 1;
 452         unsigned  instruction_fetch : 1;
 453         unsigned                    : 30;
 454         /*
 455          * These addresses are copied into cr10 & cr11 if single
 456          * stepping is switched off
 457          */
 458         unsigned long starting_addr;
 459         unsigned long ending_addr;
 460         union {
 461                 per_lowcore_words words;
 462                 per_lowcore_bits  bits;
 463         } lowcore;
 464 } per_struct;
 465
 466 typedef struct
 467 {
 468         unsigned int  len;
 469         unsigned long kernel_addr;
 470         unsigned long process_addr;
 471 } ptrace_area;
 472
 473 /*
 474  * S/390 specific non posix ptrace requests. I chose unusual values so
 475  * they are unlikely to clash with future ptrace definitions.
 476  */
 477 #define PTRACE_PEEKUSR_AREA           0x5000
 478 #define PTRACE_POKEUSR_AREA           0x5001
 479 #define PTRACE_PEEKTEXT_AREA          0x5002
 480 #define PTRACE_PEEKDATA_AREA          0x5003
 481 #define PTRACE_POKETEXT_AREA          0x5004
 482 #define PTRACE_POKEDATA_AREA          0x5005
 483 #define PTRACE_GET_LAST_BREAK         0x5006
 484 #define PTRACE_PEEK_SYSTEM_CALL       0x5007
 485 #define PTRACE_POKE_SYSTEM_CALL       0x5008
 486
 487 /*
 488  * PT_PROT definition is loosely based on hppa bsd definition in
 489  * gdb/hppab-nat.c
 490  */
 491 #define PTRACE_PROT                       21
 492
 493 typedef enum
 494 {
 495         ptprot_set_access_watchpoint,
 496         ptprot_set_write_watchpoint,
 497         ptprot_disable_watchpoint
 498 } ptprot_flags;
 499
 500 typedef struct
 501 {
 502         unsigned long lowaddr;
 503         unsigned long hiaddr;
 504         ptprot_flags prot;
 505 } ptprot_area;
 506
 507 /* Sequence of bytes for breakpoint illegal instruction.  */
 508 #define S390_BREAKPOINT     {0x0,0x1}
 509 #define S390_BREAKPOINT_U16 ((__u16)0x0001)
 510 #define S390_SYSCALL_OPCODE ((__u16)0x0a00)
 511 #define S390_SYSCALL_SIZE   2
 512
 513 /*
 514  * The user_regs_struct defines the way the user registers are
 515  * store on the stack for signal handling.
 516  */
 517 struct user_regs_struct
 518 {
 519         psw_t psw;
 520         unsigned long gprs[NUM_GPRS];
 521         unsigned int  acrs[NUM_ACRS];
 522         unsigned long orig_gpr2;
 523         s390_fp_regs fp_regs;
 524         /*
 525          * These per registers are in here so that gdb can modify them
 526          * itself as there is no "official" ptrace interface for hardware
 527          * watchpoints. This is the way intel does it.
 528          */
 529         per_struct per_info;
 530         unsigned long ieee_instruction_pointer; /* obsolete, always 0 */
 531 };
 532
 533 #ifdef __KERNEL__
 534 /*
 535  * These are defined as per linux/ptrace.h, which see.
 536  */
 537 #define arch_has_single_step()  (1)
 538
 539 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 540 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
 541 #define user_stack_pointer(regs)((regs)->gprs[15])
 542 #define profile_pc(regs) instruction_pointer(regs)
 543
 544 static inline long regs_return_value(struct pt_regs *regs)
 545 {
 546         return regs->gprs[2];
 547 }
 548
 549 int regs_query_register_offset(const char *name);
 550 const char *regs_query_register_name(unsigned int offset);
 551 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
 552 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
 553
 554 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 555 {
 556         return regs->gprs[15] & PSW_ADDR_INSN;
 557 }
 558
 559 #endif /* __KERNEL__ */
 560 #endif /* __ASSEMBLY__ */
 561
 562 #endif /* _S390_PTRACE_H */