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