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#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 NUM_GPRS 16 96#define NUM_FPRS 16 97#define NUM_CRS 16 98#define NUM_ACRS 16 99#define GPR_SIZE 4 100#define FPR_SIZE 8 101#define FPC_SIZE 4 102#define FPC_PAD_SIZE 4 /* gcc insists on aligning the fpregs */ 103#define CR_SIZE 4 104#define ACR_SIZE 4 105 106#define STACK_FRAME_OVERHEAD 96 /* size of minimum stack frame */ 107 108#ifndef __ASSEMBLY__ 109#include <linux/config.h> 110#include <linux/stddef.h> 111#include <linux/types.h> 112 113#include <asm/current.h> 114#include <asm/setup.h> 115 116/* this typedef defines how a Program Status Word looks like */ 117typedef struct 118{ 119 __u32 mask; 120 __u32 addr; 121} __attribute__ ((aligned(8))) psw_t; 122 123#ifdef __KERNEL__ 124#define FIX_PSW(addr) ((unsigned long)(addr)|0x80000000UL) 125#define ADDR_BITS_REMOVE(addr) ((addr)&0x7fffffff) 126#endif 127 128typedef union 129{ 130 float f; 131 double d; 132 __u64 ui; 133 struct 134 { 135 __u32 hi; 136 __u32 lo; 137 } fp; 138} freg_t; 139 140typedef struct 141{ 142 __u32 fpc; 143 freg_t fprs[NUM_FPRS]; 144} s390_fp_regs; 145 146#define FPC_EXCEPTION_MASK 0xF8000000 147#define FPC_FLAGS_MASK 0x00F80000 148#define FPC_DXC_MASK 0x0000FF00 149#define FPC_RM_MASK 0x00000003 150#define FPC_VALID_MASK 0xF8F8FF03 151 152/* 153 * The first entries in pt_regs and user_regs_struct 154 * are common for the two structures. The s390_regs structure 155 * covers the common parts. It simplifies copying the common part 156 * between the three structures. 157 */ 158typedef struct 159{ 160 psw_t psw; 161 __u32 gprs[NUM_GPRS]; 162 __u32 acrs[NUM_ACRS]; 163 __u32 orig_gpr2; 164} s390_regs; 165 166/* 167 * The pt_regs struct defines the way the registers are stored on 168 * the stack during a system call. 169 */ 170struct pt_regs 171{ 172 psw_t psw; 173 __u32 gprs[NUM_GPRS]; 174 __u32 acrs[NUM_ACRS]; 175 __u32 orig_gpr2; 176 __u32 trap; 177}; 178 179/* 180 * Now for the program event recording (trace) definitions. 181 */ 182typedef struct 183{ 184 __u32 cr[3]; 185} per_cr_words; 186 187#define PER_EM_MASK 0xE8000000 188 189typedef struct 190{ 191 unsigned em_branching : 1; 192 unsigned em_instruction_fetch : 1; 193 /* 194 * Switching on storage alteration automatically fixes 195 * the storage alteration event bit in the users std. 196 */ 197 unsigned em_storage_alteration : 1; 198 unsigned em_gpr_alt_unused : 1; 199 unsigned em_store_real_address : 1; 200 unsigned : 3; 201 unsigned branch_addr_ctl : 1; 202 unsigned : 1; 203 unsigned storage_alt_space_ctl : 1; 204 unsigned : 21; 205 addr_t starting_addr; 206 addr_t ending_addr; 207} per_cr_bits; 208 209typedef struct 210{ 211 __u16 perc_atmid; /* 0x096 */ 212 __u32 address; /* 0x098 */ 213 __u8 access_id; /* 0x0a1 */ 214} per_lowcore_words; 215 216typedef struct 217{ 218 unsigned perc_branching : 1; /* 0x096 */ 219 unsigned perc_instruction_fetch : 1; 220 unsigned perc_storage_alteration : 1; 221 unsigned perc_gpr_alt_unused : 1; 222 unsigned perc_store_real_address : 1; 223 unsigned : 4; 224 unsigned atmid_validity_bit : 1; 225 unsigned atmid_psw_bit_32 : 1; 226 unsigned atmid_psw_bit_5 : 1; 227 unsigned atmid_psw_bit_16 : 1; 228 unsigned atmid_psw_bit_17 : 1; 229 unsigned si : 2; 230 addr_t address; /* 0x098 */ 231 unsigned : 4; /* 0x0a1 */ 232 unsigned access_id : 4; 233} per_lowcore_bits; 234 235typedef struct 236{ 237 union { 238 per_cr_words words; 239 per_cr_bits bits; 240 } control_regs; 241 /* 242 * Use these flags instead of setting em_instruction_fetch 243 * directly they are used so that single stepping can be 244 * switched on & off while not affecting other tracing 245 */ 246 unsigned single_step : 1; 247 unsigned instruction_fetch : 1; 248 unsigned : 30; 249 /* 250 * These addresses are copied into cr10 & cr11 if single 251 * stepping is switched off 252 */ 253 __u32 starting_addr; 254 __u32 ending_addr; 255 union { 256 per_lowcore_words words; 257 per_lowcore_bits bits; 258 } lowcore; 259} per_struct; 260 261typedef struct 262{ 263 __u32 len; 264 addr_t kernel_addr; 265 addr_t process_addr; 266} ptrace_area; 267 268/* 269 * S/390 specific non posix ptrace requests. I chose unusual values so 270 * they are unlikely to clash with future ptrace definitions. 271 */ 272#define PTRACE_PEEKUSR_AREA 0x5000 273#define PTRACE_POKEUSR_AREA 0x5001 274#define PTRACE_PEEKTEXT_AREA 0x5002 275#define PTRACE_PEEKDATA_AREA 0x5003 276#define PTRACE_POKETEXT_AREA 0x5004 277#define PTRACE_POKEDATA_AREA 0x5005 278/* 279 * PT_PROT definition is loosely based on hppa bsd definition in 280 * gdb/hppab-nat.c 281 */ 282#define PTRACE_PROT 21 283 284typedef enum 285{ 286 ptprot_set_access_watchpoint, 287 ptprot_set_write_watchpoint, 288 ptprot_disable_watchpoint 289} ptprot_flags; 290 291typedef struct 292{ 293 addr_t lowaddr; 294 addr_t hiaddr; 295 ptprot_flags prot; 296} ptprot_area; 297 298/* Sequence of bytes for breakpoint illegal instruction. */ 299#define S390_BREAKPOINT {0x0,0x1} 300#define S390_BREAKPOINT_U16 ((__u16)0x0001) 301#define S390_SYSCALL_OPCODE ((__u16)0x0a00) 302#define S390_SYSCALL_SIZE 2 303 304/* 305 * The user_regs_struct defines the way the user registers are 306 * store on the stack for signal handling. 307 */ 308struct user_regs_struct 309{ 310 psw_t psw; 311 __u32 gprs[NUM_GPRS]; 312 __u32 acrs[NUM_ACRS]; 313 __u32 orig_gpr2; 314 s390_fp_regs fp_regs; 315 /* 316 * These per registers are in here so that gdb can modify them 317 * itself as there is no "official" ptrace interface for hardware 318 * watchpoints. This is the way intel does it. 319 */ 320 per_struct per_info; 321 addr_t ieee_instruction_pointer; 322 /* Used to give failing instruction back to user for ieee exceptions */ 323}; 324 325#ifdef __KERNEL__ 326#define user_mode(regs) (((regs)->psw.mask & PSW_PROBLEM_STATE) != 0) 327#define instruction_pointer(regs) ((regs)->psw.addr) 328extern void show_regs(struct pt_regs * regs); 329extern char *task_show_regs(struct task_struct *task, char *buffer); 330#endif 331 332#endif /* __ASSEMBLY__ */ 333 334#endif /* _S390_PTRACE_H */ 335