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 #ifndef _S390_PTRACE_H
   7 #define _S390_PTRACE_H
   8
   9 #include <uapi/asm/ptrace.h>
  10
  11 #define PIF_SYSCALL             0       /* inside a system call */
  12 #define PIF_PER_TRAP            1       /* deliver sigtrap on return to user */
  13
  14 #define _PIF_SYSCALL            (1<<PIF_SYSCALL)
  15 #define _PIF_PER_TRAP           (1<<PIF_PER_TRAP)
  16
  17 #ifndef __ASSEMBLY__
  18
  19 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
  20                          PSW_MASK_EA | PSW_MASK_BA)
  21 #define PSW_USER_BITS   (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
  22                          PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
  23                          PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
  24
  25 struct psw_bits {
  26         unsigned long long      : 1;
  27         unsigned long long r    : 1; /* PER-Mask */
  28         unsigned long long      : 3;
  29         unsigned long long t    : 1; /* DAT Mode */
  30         unsigned long long i    : 1; /* Input/Output Mask */
  31         unsigned long long e    : 1; /* External Mask */
  32         unsigned long long key  : 4; /* PSW Key */
  33         unsigned long long      : 1;
  34         unsigned long long m    : 1; /* Machine-Check Mask */
  35         unsigned long long w    : 1; /* Wait State */
  36         unsigned long long p    : 1; /* Problem State */
  37         unsigned long long as   : 2; /* Address Space Control */
  38         unsigned long long cc   : 2; /* Condition Code */
  39         unsigned long long pm   : 4; /* Program Mask */
  40         unsigned long long ri   : 1; /* Runtime Instrumentation */
  41         unsigned long long      : 6;
  42         unsigned long long eaba : 2; /* Addressing Mode */
  43 #ifdef CONFIG_64BIT
  44         unsigned long long      : 31;
  45         unsigned long long ia   : 64;/* Instruction Address */
  46 #else
  47         unsigned long long ia   : 31;/* Instruction Address */
  48 #endif
  49 };
  50
  51 enum {
  52         PSW_AMODE_24BIT = 0,
  53         PSW_AMODE_31BIT = 1,
  54         PSW_AMODE_64BIT = 3
  55 };
  56
  57 enum {
  58         PSW_AS_PRIMARY   = 0,
  59         PSW_AS_ACCREG    = 1,
  60         PSW_AS_SECONDARY = 2,
  61         PSW_AS_HOME      = 3
  62 };
  63
  64 #define psw_bits(__psw) (*({                    \
  65         typecheck(psw_t, __psw);                \
  66         &(*(struct psw_bits *)(&(__psw)));      \
  67 }))
  68
  69 /*
  70  * The pt_regs struct defines the way the registers are stored on
  71  * the stack during a system call.
  72  */
  73 struct pt_regs
  74 {
  75         unsigned long args[1];
  76         psw_t psw;
  77         unsigned long gprs[NUM_GPRS];
  78         unsigned long orig_gpr2;
  79         unsigned int int_code;
  80         unsigned int int_parm;
  81         unsigned long int_parm_long;
  82         unsigned long flags;
  83 };
  84
  85 /*
  86  * Program event recording (PER) register set.
  87  */
  88 struct per_regs {
  89         unsigned long control;          /* PER control bits */
  90         unsigned long start;            /* PER starting address */
  91         unsigned long end;              /* PER ending address */
  92 };
  93
  94 /*
  95  * PER event contains information about the cause of the last PER exception.
  96  */
  97 struct per_event {
  98         unsigned short cause;           /* PER code, ATMID and AI */
  99         unsigned long address;          /* PER address */
 100         unsigned char paid;             /* PER access identification */
 101 };
 102
 103 /*
 104  * Simplified per_info structure used to decode the ptrace user space ABI.
 105  */
 106 struct per_struct_kernel {
 107         unsigned long cr9;              /* PER control bits */
 108         unsigned long cr10;             /* PER starting address */
 109         unsigned long cr11;             /* PER ending address */
 110         unsigned long bits;             /* Obsolete software bits */
 111         unsigned long starting_addr;    /* User specified start address */
 112         unsigned long ending_addr;      /* User specified end address */
 113         unsigned short perc_atmid;      /* PER trap ATMID */
 114         unsigned long address;          /* PER trap instruction address */
 115         unsigned char access_id;        /* PER trap access identification */
 116 };
 117
 118 #define PER_EVENT_MASK                  0xEB000000UL
 119
 120 #define PER_EVENT_BRANCH                0x80000000UL
 121 #define PER_EVENT_IFETCH                0x40000000UL
 122 #define PER_EVENT_STORE                 0x20000000UL
 123 #define PER_EVENT_STORE_REAL            0x08000000UL
 124 #define PER_EVENT_TRANSACTION_END       0x02000000UL
 125 #define PER_EVENT_NULLIFICATION         0x01000000UL
 126
 127 #define PER_CONTROL_MASK                0x00e00000UL
 128
 129 #define PER_CONTROL_BRANCH_ADDRESS      0x00800000UL
 130 #define PER_CONTROL_SUSPENSION          0x00400000UL
 131 #define PER_CONTROL_ALTERATION          0x00200000UL
 132
 133 static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
 134 {
 135         regs->flags |= (1U << flag);
 136 }
 137
 138 static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
 139 {
 140         regs->flags &= ~(1U << flag);
 141 }
 142
 143 static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
 144 {
 145         return !!(regs->flags & (1U << flag));
 146 }
 147
 148 /*
 149  * These are defined as per linux/ptrace.h, which see.
 150  */
 151 #define arch_has_single_step()  (1)
 152 #define arch_has_block_step()   (1)
 153
 154 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 155 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
 156 #define user_stack_pointer(regs)((regs)->gprs[15])
 157 #define profile_pc(regs) instruction_pointer(regs)
 158
 159 static inline long regs_return_value(struct pt_regs *regs)
 160 {
 161         return regs->gprs[2];
 162 }
 163
 164 static inline void instruction_pointer_set(struct pt_regs *regs,
 165                                            unsigned long val)
 166 {
 167         regs->psw.addr = val | PSW_ADDR_AMODE;
 168 }
 169
 170 int regs_query_register_offset(const char *name);
 171 const char *regs_query_register_name(unsigned int offset);
 172 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
 173 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
 174
 175 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 176 {
 177         return regs->gprs[15] & PSW_ADDR_INSN;
 178 }
 179
 180 #endif /* __ASSEMBLY__ */
 181 #endif /* _S390_PTRACE_H */