include/asm-s390/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/config.h>
 185 #include <linux/stddef.h>
 186 #include <linux/types.h>
 187 #include <asm/setup.h>
 188 #include <asm/page.h>
 189
 190 typedef union
 191 {
 192         float   f;
 193         double  d;
 194         __u64   ui;
 195         struct
 196         {
 197                 __u32 hi;
 198                 __u32 lo;
 199         } fp;
 200 } freg_t;
 201
 202 typedef struct
 203 {
 204         __u32   fpc;
 205         freg_t  fprs[NUM_FPRS];
 206 } s390_fp_regs;
 207
 208 #define FPC_EXCEPTION_MASK      0xF8000000
 209 #define FPC_FLAGS_MASK          0x00F80000
 210 #define FPC_DXC_MASK            0x0000FF00
 211 #define FPC_RM_MASK             0x00000003
 212 #define FPC_VALID_MASK          0xF8F8FF03
 213
 214 /* this typedef defines how a Program Status Word looks like */
 215 typedef struct
 216 {
 217         unsigned long mask;
 218         unsigned long addr;
 219 } __attribute__ ((aligned(8))) psw_t;
 220
 221 #ifndef __s390x__
 222
 223 #define PSW_MASK_PER            0x40000000UL
 224 #define PSW_MASK_DAT            0x04000000UL
 225 #define PSW_MASK_IO             0x02000000UL
 226 #define PSW_MASK_EXT            0x01000000UL
 227 #define PSW_MASK_KEY            0x00F00000UL
 228 #define PSW_MASK_MCHECK         0x00040000UL
 229 #define PSW_MASK_WAIT           0x00020000UL
 230 #define PSW_MASK_PSTATE         0x00010000UL
 231 #define PSW_MASK_ASC            0x0000C000UL
 232 #define PSW_MASK_CC             0x00003000UL
 233 #define PSW_MASK_PM             0x00000F00UL
 234
 235 #define PSW_ADDR_AMODE          0x80000000UL
 236 #define PSW_ADDR_INSN           0x7FFFFFFFUL
 237
 238 #define PSW_BASE_BITS           0x00080000UL
 239 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 20)
 240
 241 #define PSW_ASC_PRIMARY         0x00000000UL
 242 #define PSW_ASC_ACCREG          0x00004000UL
 243 #define PSW_ASC_SECONDARY       0x00008000UL
 244 #define PSW_ASC_HOME            0x0000C000UL
 245
 246 #else /* __s390x__ */
 247
 248 #define PSW_MASK_PER            0x4000000000000000UL
 249 #define PSW_MASK_DAT            0x0400000000000000UL
 250 #define PSW_MASK_IO             0x0200000000000000UL
 251 #define PSW_MASK_EXT            0x0100000000000000UL
 252 #define PSW_MASK_KEY            0x00F0000000000000UL
 253 #define PSW_MASK_MCHECK         0x0004000000000000UL
 254 #define PSW_MASK_WAIT           0x0002000000000000UL
 255 #define PSW_MASK_PSTATE         0x0001000000000000UL
 256 #define PSW_MASK_ASC            0x0000C00000000000UL
 257 #define PSW_MASK_CC             0x0000300000000000UL
 258 #define PSW_MASK_PM             0x00000F0000000000UL
 259
 260 #define PSW_ADDR_AMODE          0x0000000000000000UL
 261 #define PSW_ADDR_INSN           0xFFFFFFFFFFFFFFFFUL
 262
 263 #define PSW_BASE_BITS           0x0000000180000000UL
 264 #define PSW_BASE32_BITS         0x0000000080000000UL
 265 #define PSW_DEFAULT_KEY         (((unsigned long) PAGE_DEFAULT_ACC) << 52)
 266
 267 #define PSW_ASC_PRIMARY         0x0000000000000000UL
 268 #define PSW_ASC_ACCREG          0x0000400000000000UL
 269 #define PSW_ASC_SECONDARY       0x0000800000000000UL
 270 #define PSW_ASC_HOME            0x0000C00000000000UL
 271
 272 #define PSW_USER32_BITS (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
 273                          PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
 274                          PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
 275
 276 #endif /* __s390x__ */
 277
 278 #define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
 279                          PSW_MASK_MCHECK | PSW_DEFAULT_KEY)
 280 #define PSW_USER_BITS   (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
 281                          PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
 282                          PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
 283
 284 /* This macro merges a NEW PSW mask specified by the user into
 285    the currently active PSW mask CURRENT, modifying only those
 286    bits in CURRENT that the user may be allowed to change: this
 287    is the condition code and the program mask bits.  */
 288 #define PSW_MASK_MERGE(CURRENT,NEW) \
 289         (((CURRENT) & ~(PSW_MASK_CC|PSW_MASK_PM)) | \
 290          ((NEW) & (PSW_MASK_CC|PSW_MASK_PM)))
 291
 292 /*
 293  * The s390_regs structure is used to define the elf_gregset_t.
 294  */
 295 typedef struct
 296 {
 297         psw_t psw;
 298         unsigned long gprs[NUM_GPRS];
 299         unsigned int  acrs[NUM_ACRS];
 300         unsigned long orig_gpr2;
 301 } s390_regs;
 302
 303 #ifdef __KERNEL__
 304 /*
 305  * The pt_regs struct defines the way the registers are stored on
 306  * the stack during a system call.
 307  */
 308 struct pt_regs
 309 {
 310         unsigned long args[1];
 311         psw_t psw;
 312         unsigned long gprs[NUM_GPRS];
 313         unsigned long orig_gpr2;
 314         unsigned short ilc;
 315         unsigned short trap;
 316 };
 317 #endif
 318
 319 /*
 320  * Now for the program event recording (trace) definitions.
 321  */
 322 typedef struct
 323 {
 324         unsigned long cr[3];
 325 } per_cr_words;
 326
 327 #define PER_EM_MASK 0xE8000000UL
 328
 329 typedef struct
 330 {
 331 #ifdef __s390x__
 332         unsigned                       : 32;
 333 #endif /* __s390x__ */
 334         unsigned em_branching          : 1;
 335         unsigned em_instruction_fetch  : 1;
 336         /*
 337          * Switching on storage alteration automatically fixes
 338          * the storage alteration event bit in the users std.
 339          */
 340         unsigned em_storage_alteration : 1;
 341         unsigned em_gpr_alt_unused     : 1;
 342         unsigned em_store_real_address : 1;
 343         unsigned                       : 3;
 344         unsigned branch_addr_ctl       : 1;
 345         unsigned                       : 1;
 346         unsigned storage_alt_space_ctl : 1;
 347         unsigned                       : 21;
 348         unsigned long starting_addr;
 349         unsigned long ending_addr;
 350 } per_cr_bits;
 351
 352 typedef struct
 353 {
 354         unsigned short perc_atmid;
 355         unsigned long address;
 356         unsigned char access_id;
 357 } per_lowcore_words;
 358
 359 typedef struct
 360 {
 361         unsigned perc_branching          : 1;
 362         unsigned perc_instruction_fetch  : 1;
 363         unsigned perc_storage_alteration : 1;
 364         unsigned perc_gpr_alt_unused     : 1;
 365         unsigned perc_store_real_address : 1;
 366         unsigned                         : 3;
 367         unsigned atmid_psw_bit_31        : 1;
 368         unsigned atmid_validity_bit      : 1;
 369         unsigned atmid_psw_bit_32        : 1;
 370         unsigned atmid_psw_bit_5         : 1;
 371         unsigned atmid_psw_bit_16        : 1;
 372         unsigned atmid_psw_bit_17        : 1;
 373         unsigned si                      : 2;
 374         unsigned long address;
 375         unsigned                         : 4;
 376         unsigned access_id               : 4;
 377 } per_lowcore_bits;
 378
 379 typedef struct
 380 {
 381         union {
 382                 per_cr_words   words;
 383                 per_cr_bits    bits;
 384         } control_regs;
 385         /*
 386          * Use these flags instead of setting em_instruction_fetch
 387          * directly they are used so that single stepping can be
 388          * switched on & off while not affecting other tracing
 389          */
 390         unsigned  single_step       : 1;
 391         unsigned  instruction_fetch : 1;
 392         unsigned                    : 30;
 393         /*
 394          * These addresses are copied into cr10 & cr11 if single
 395          * stepping is switched off
 396          */
 397         unsigned long starting_addr;
 398         unsigned long ending_addr;
 399         union {
 400                 per_lowcore_words words;
 401                 per_lowcore_bits  bits;
 402         } lowcore;
 403 } per_struct;
 404
 405 typedef struct
 406 {
 407         unsigned int  len;
 408         unsigned long kernel_addr;
 409         unsigned long process_addr;
 410 } ptrace_area;
 411
 412 /*
 413  * S/390 specific non posix ptrace requests. I chose unusual values so
 414  * they are unlikely to clash with future ptrace definitions.
 415  */
 416 #define PTRACE_PEEKUSR_AREA           0x5000
 417 #define PTRACE_POKEUSR_AREA           0x5001
 418 #define PTRACE_PEEKTEXT_AREA          0x5002
 419 #define PTRACE_PEEKDATA_AREA          0x5003
 420 #define PTRACE_POKETEXT_AREA          0x5004
 421 #define PTRACE_POKEDATA_AREA          0x5005
 422
 423 /*
 424  * PT_PROT definition is loosely based on hppa bsd definition in
 425  * gdb/hppab-nat.c
 426  */
 427 #define PTRACE_PROT                       21
 428
 429 typedef enum
 430 {
 431         ptprot_set_access_watchpoint,
 432         ptprot_set_write_watchpoint,
 433         ptprot_disable_watchpoint
 434 } ptprot_flags;
 435
 436 typedef struct
 437 {
 438         unsigned long lowaddr;
 439         unsigned long hiaddr;
 440         ptprot_flags prot;
 441 } ptprot_area;
 442
 443 /* Sequence of bytes for breakpoint illegal instruction.  */
 444 #define S390_BREAKPOINT     {0x0,0x1}
 445 #define S390_BREAKPOINT_U16 ((__u16)0x0001)
 446 #define S390_SYSCALL_OPCODE ((__u16)0x0a00)
 447 #define S390_SYSCALL_SIZE   2
 448
 449 /*
 450  * The user_regs_struct defines the way the user registers are
 451  * store on the stack for signal handling.
 452  */
 453 struct user_regs_struct
 454 {
 455         psw_t psw;
 456         unsigned long gprs[NUM_GPRS];
 457         unsigned int  acrs[NUM_ACRS];
 458         unsigned long orig_gpr2;
 459         s390_fp_regs fp_regs;
 460         /*
 461          * These per registers are in here so that gdb can modify them
 462          * itself as there is no "official" ptrace interface for hardware
 463          * watchpoints. This is the way intel does it.
 464          */
 465         per_struct per_info;
 466         unsigned long ieee_instruction_pointer;
 467         /* Used to give failing instruction back to user for ieee exceptions */
 468 };
 469
 470 #ifdef __KERNEL__
 471 #define __ARCH_SYS_PTRACE       1
 472
 473 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 474 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
 475 #define profile_pc(regs) instruction_pointer(regs)
 476 extern void show_regs(struct pt_regs * regs);
 477 #endif
 478
 479 static inline void
 480 psw_set_key(unsigned int key)
 481 {
 482         asm volatile ( "spka 0(%0)" : : "d" (key) );
 483 }
 484
 485 #endif /* __ASSEMBLY__ */
 486
 487 #endif /* _S390_PTRACE_H */