arch/s390/include/asm/ptrace.h

   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 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_MCHECK         0x00040000UL
 232 #define PSW_MASK_WAIT           0x00020000UL
 233 #define PSW_MASK_PSTATE         0x00010000UL
 234 #define PSW_MASK_ASC            0x0000C000UL
 235 #define PSW_MASK_CC             0x00003000UL
 236 #define PSW_MASK_PM             0x00000F00UL
 237
 238 #define PSW_ADDR_AMODE          0x80000000UL
 239 #define PSW_ADDR_INSN           0x7FFFFFFFUL
 240
 241 #define PSW_BASE_BITS           0x00080000UL
 242 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 20)
 243
 244 #define PSW_ASC_PRIMARY         0x00000000UL
 245 #define PSW_ASC_ACCREG          0x00004000UL
 246 #define PSW_ASC_SECONDARY       0x00008000UL
 247 #define PSW_ASC_HOME            0x0000C000UL
 248
 249 #else /* __s390x__ */
 250
 251 #define PSW_MASK_PER            0x4000000000000000UL
 252 #define PSW_MASK_DAT            0x0400000000000000UL
 253 #define PSW_MASK_IO             0x0200000000000000UL
 254 #define PSW_MASK_EXT            0x0100000000000000UL
 255 #define PSW_MASK_KEY            0x00F0000000000000UL
 256 #define PSW_MASK_MCHECK         0x0004000000000000UL
 257 #define PSW_MASK_WAIT           0x0002000000000000UL
 258 #define PSW_MASK_PSTATE         0x0001000000000000UL
 259 #define PSW_MASK_ASC            0x0000C00000000000UL
 260 #define PSW_MASK_CC             0x0000300000000000UL
 261 #define PSW_MASK_PM             0x00000F0000000000UL
 262
 263 #define PSW_ADDR_AMODE          0x0000000000000000UL
 264 #define PSW_ADDR_INSN           0xFFFFFFFFFFFFFFFFUL
 265
 266 #define PSW_BASE_BITS           0x0000000180000000UL
 267 #define PSW_BASE32_BITS         0x0000000080000000UL
 268 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 52)
 269
 270 #define PSW_ASC_PRIMARY         0x0000000000000000UL
 271 #define PSW_ASC_ACCREG          0x0000400000000000UL
 272 #define PSW_ASC_SECONDARY       0x0000800000000000UL
 273 #define PSW_ASC_HOME            0x0000C00000000000UL
 274
 275 extern long psw_user32_bits;
 276
 277 #endif /* __s390x__ */
 278
 279 extern long psw_kernel_bits;
 280 extern long psw_user_bits;
 281
 282 /* This macro merges a NEW PSW mask specified by the user into
 283    the currently active PSW mask CURRENT, modifying only those
 284    bits in CURRENT that the user may be allowed to change: this
 285    is the condition code and the program mask bits.  */
 286 #define PSW_MASK_MERGE(CURRENT,NEW) \
 287         (((CURRENT) & ~(PSW_MASK_CC|PSW_MASK_PM)) | \
 288          ((NEW) & (PSW_MASK_CC|PSW_MASK_PM)))
 289
 290 /*
 291  * The s390_regs structure is used to define the elf_gregset_t.
 292  */
 293 typedef struct
 294 {
 295         psw_t psw;
 296         unsigned long gprs[NUM_GPRS];
 297         unsigned int  acrs[NUM_ACRS];
 298         unsigned long orig_gpr2;
 299 } s390_regs;
 300
 301 typedef struct
 302 {
 303         psw_compat_t    psw;
 304         __u32           gprs[NUM_GPRS];
 305         __u32           acrs[NUM_ACRS];
 306         __u32           orig_gpr2;
 307 } s390_compat_regs;
 308
 309
 310 #ifdef __KERNEL__
 311 #include <asm/setup.h>
 312 #include <asm/page.h>
 313
 314 /*
 315  * The pt_regs struct defines the way the registers are stored on
 316  * the stack during a system call.
 317  */
 318 struct pt_regs
 319 {
 320         unsigned long args[1];
 321         psw_t psw;
 322         unsigned long gprs[NUM_GPRS];
 323         unsigned long orig_gpr2;
 324         unsigned short ilc;
 325         unsigned short trap;
 326 };
 327 #endif
 328
 329 /*
 330  * Now for the program event recording (trace) definitions.
 331  */
 332 typedef struct
 333 {
 334         unsigned long cr[3];
 335 } per_cr_words;
 336
 337 #define PER_EM_MASK 0xE8000000UL
 338
 339 typedef struct
 340 {
 341 #ifdef __s390x__
 342         unsigned                       : 32;
 343 #endif /* __s390x__ */
 344         unsigned em_branching          : 1;
 345         unsigned em_instruction_fetch  : 1;
 346         /*
 347          * Switching on storage alteration automatically fixes
 348          * the storage alteration event bit in the users std.
 349          */
 350         unsigned em_storage_alteration : 1;
 351         unsigned em_gpr_alt_unused     : 1;
 352         unsigned em_store_real_address : 1;
 353         unsigned                       : 3;
 354         unsigned branch_addr_ctl       : 1;
 355         unsigned                       : 1;
 356         unsigned storage_alt_space_ctl : 1;
 357         unsigned                       : 21;
 358         unsigned long starting_addr;
 359         unsigned long ending_addr;
 360 } per_cr_bits;
 361
 362 typedef struct
 363 {
 364         unsigned short perc_atmid;
 365         unsigned long address;
 366         unsigned char access_id;
 367 } per_lowcore_words;
 368
 369 typedef struct
 370 {
 371         unsigned perc_branching          : 1;
 372         unsigned perc_instruction_fetch  : 1;
 373         unsigned perc_storage_alteration : 1;
 374         unsigned perc_gpr_alt_unused     : 1;
 375         unsigned perc_store_real_address : 1;
 376         unsigned                         : 3;
 377         unsigned atmid_psw_bit_31        : 1;
 378         unsigned atmid_validity_bit      : 1;
 379         unsigned atmid_psw_bit_32        : 1;
 380         unsigned atmid_psw_bit_5         : 1;
 381         unsigned atmid_psw_bit_16        : 1;
 382         unsigned atmid_psw_bit_17        : 1;
 383         unsigned si                      : 2;
 384         unsigned long address;
 385         unsigned                         : 4;
 386         unsigned access_id               : 4;
 387 } per_lowcore_bits;
 388
 389 typedef struct
 390 {
 391         union {
 392                 per_cr_words   words;
 393                 per_cr_bits    bits;
 394         } control_regs;
 395         /*
 396          * Use these flags instead of setting em_instruction_fetch
 397          * directly they are used so that single stepping can be
 398          * switched on & off while not affecting other tracing
 399          */
 400         unsigned  single_step       : 1;
 401         unsigned  instruction_fetch : 1;
 402         unsigned                    : 30;
 403         /*
 404          * These addresses are copied into cr10 & cr11 if single
 405          * stepping is switched off
 406          */
 407         unsigned long starting_addr;
 408         unsigned long ending_addr;
 409         union {
 410                 per_lowcore_words words;
 411                 per_lowcore_bits  bits;
 412         } lowcore;
 413 } per_struct;
 414
 415 typedef struct
 416 {
 417         unsigned int  len;
 418         unsigned long kernel_addr;
 419         unsigned long process_addr;
 420 } ptrace_area;
 421
 422 /*
 423  * S/390 specific non posix ptrace requests. I chose unusual values so
 424  * they are unlikely to clash with future ptrace definitions.
 425  */
 426 #define PTRACE_PEEKUSR_AREA           0x5000
 427 #define PTRACE_POKEUSR_AREA           0x5001
 428 #define PTRACE_PEEKTEXT_AREA          0x5002
 429 #define PTRACE_PEEKDATA_AREA          0x5003
 430 #define PTRACE_POKETEXT_AREA          0x5004
 431 #define PTRACE_POKEDATA_AREA          0x5005
 432
 433 /*
 434  * PT_PROT definition is loosely based on hppa bsd definition in
 435  * gdb/hppab-nat.c
 436  */
 437 #define PTRACE_PROT                       21
 438
 439 typedef enum
 440 {
 441         ptprot_set_access_watchpoint,
 442         ptprot_set_write_watchpoint,
 443         ptprot_disable_watchpoint
 444 } ptprot_flags;
 445
 446 typedef struct
 447 {
 448         unsigned long lowaddr;
 449         unsigned long hiaddr;
 450         ptprot_flags prot;
 451 } ptprot_area;
 452
 453 /* Sequence of bytes for breakpoint illegal instruction.  */
 454 #define S390_BREAKPOINT     {0x0,0x1}
 455 #define S390_BREAKPOINT_U16 ((__u16)0x0001)
 456 #define S390_SYSCALL_OPCODE ((__u16)0x0a00)
 457 #define S390_SYSCALL_SIZE   2
 458
 459 /*
 460  * The user_regs_struct defines the way the user registers are
 461  * store on the stack for signal handling.
 462  */
 463 struct user_regs_struct
 464 {
 465         psw_t psw;
 466         unsigned long gprs[NUM_GPRS];
 467         unsigned int  acrs[NUM_ACRS];
 468         unsigned long orig_gpr2;
 469         s390_fp_regs fp_regs;
 470         /*
 471          * These per registers are in here so that gdb can modify them
 472          * itself as there is no "official" ptrace interface for hardware
 473          * watchpoints. This is the way intel does it.
 474          */
 475         per_struct per_info;
 476         unsigned long ieee_instruction_pointer;
 477         /* Used to give failing instruction back to user for ieee exceptions */
 478 };
 479
 480 #ifdef __KERNEL__
 481 /*
 482  * These are defined as per linux/ptrace.h, which see.
 483  */
 484 #define arch_has_single_step()  (1)
 485 struct task_struct;
 486 extern void user_enable_single_step(struct task_struct *);
 487 extern void user_disable_single_step(struct task_struct *);
 488
 489 #define __ARCH_WANT_COMPAT_SYS_PTRACE
 490
 491 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 492 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
 493 #define regs_return_value(regs)((regs)->gprs[2])
 494 #define profile_pc(regs) instruction_pointer(regs)
 495 extern void show_regs(struct pt_regs * regs);
 496 #endif /* __KERNEL__ */
 497 #endif /* __ASSEMBLY__ */
 498
 499 #endif /* _S390_PTRACE_H */