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 #define PIF_SYSCALL_RESTART     2       /* restart the current system call */
  15
  16 #define _PIF_SYSCALL            _BITUL(PIF_SYSCALL)
  17 #define _PIF_PER_TRAP           _BITUL(PIF_PER_TRAP)
  18 #define _PIF_SYSCALL_RESTART    _BITUL(PIF_SYSCALL_RESTART)
  19
  20 #ifndef __ASSEMBLY__
  21
  22 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
  23                          PSW_MASK_EA | PSW_MASK_BA)
  24 #define PSW_USER_BITS   (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
  25                          PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
  26                          PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
  27
  28 struct psw_bits {
  29         unsigned long        :  1;
  30         unsigned long per    :  1; /* PER-Mask */
  31         unsigned long        :  3;
  32         unsigned long dat    :  1; /* DAT Mode */
  33         unsigned long io     :  1; /* Input/Output Mask */
  34         unsigned long ext    :  1; /* External Mask */
  35         unsigned long key    :  4; /* PSW Key */
  36         unsigned long        :  1;
  37         unsigned long mcheck :  1; /* Machine-Check Mask */
  38         unsigned long wait   :  1; /* Wait State */
  39         unsigned long pstate :  1; /* Problem State */
  40         unsigned long as     :  2; /* Address Space Control */
  41         unsigned long cc     :  2; /* Condition Code */
  42         unsigned long pm     :  4; /* Program Mask */
  43         unsigned long ri     :  1; /* Runtime Instrumentation */
  44         unsigned long        :  6;
  45         unsigned long eaba   :  2; /* Addressing Mode */
  46         unsigned long        : 31;
  47         unsigned long ia     : 64; /* Instruction Address */
  48 };
  49
  50 enum {
  51         PSW_BITS_AMODE_24BIT = 0,
  52         PSW_BITS_AMODE_31BIT = 1,
  53         PSW_BITS_AMODE_64BIT = 3
  54 };
  55
  56 enum {
  57         PSW_BITS_AS_PRIMARY     = 0,
  58         PSW_BITS_AS_ACCREG      = 1,
  59         PSW_BITS_AS_SECONDARY   = 2,
  60         PSW_BITS_AS_HOME        = 3
  61 };
  62
  63 #define psw_bits(__psw) (*({                    \
  64         typecheck(psw_t, __psw);                \
  65         &(*(struct psw_bits *)(&(__psw)));      \
  66 }))
  67
  68 /*
  69  * The pt_regs struct defines the way the registers are stored on
  70  * the stack during a system call.
  71  */
  72 struct pt_regs
  73 {
  74         unsigned long args[1];
  75         psw_t psw;
  76         unsigned long gprs[NUM_GPRS];
  77         unsigned long orig_gpr2;
  78         unsigned int int_code;
  79         unsigned int int_parm;
  80         unsigned long int_parm_long;
  81         unsigned long flags;
  82 };
  83
  84 /*
  85  * Program event recording (PER) register set.
  86  */
  87 struct per_regs {
  88         unsigned long control;          /* PER control bits */
  89         unsigned long start;            /* PER starting address */
  90         unsigned long end;              /* PER ending address */
  91 };
  92
  93 /*
  94  * PER event contains information about the cause of the last PER exception.
  95  */
  96 struct per_event {
  97         unsigned short cause;           /* PER code, ATMID and AI */
  98         unsigned long address;          /* PER address */
  99         unsigned char paid;             /* PER access identification */
 100 };
 101
 102 /*
 103  * Simplified per_info structure used to decode the ptrace user space ABI.
 104  */
 105 struct per_struct_kernel {
 106         unsigned long cr9;              /* PER control bits */
 107         unsigned long cr10;             /* PER starting address */
 108         unsigned long cr11;             /* PER ending address */
 109         unsigned long bits;             /* Obsolete software bits */
 110         unsigned long starting_addr;    /* User specified start address */
 111         unsigned long ending_addr;      /* User specified end address */
 112         unsigned short perc_atmid;      /* PER trap ATMID */
 113         unsigned long address;          /* PER trap instruction address */
 114         unsigned char access_id;        /* PER trap access identification */
 115 };
 116
 117 #define PER_EVENT_MASK                  0xEB000000UL
 118
 119 #define PER_EVENT_BRANCH                0x80000000UL
 120 #define PER_EVENT_IFETCH                0x40000000UL
 121 #define PER_EVENT_STORE                 0x20000000UL
 122 #define PER_EVENT_STORE_REAL            0x08000000UL
 123 #define PER_EVENT_TRANSACTION_END       0x02000000UL
 124 #define PER_EVENT_NULLIFICATION         0x01000000UL
 125
 126 #define PER_CONTROL_MASK                0x00e00000UL
 127
 128 #define PER_CONTROL_BRANCH_ADDRESS      0x00800000UL
 129 #define PER_CONTROL_SUSPENSION          0x00400000UL
 130 #define PER_CONTROL_ALTERATION          0x00200000UL
 131
 132 static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
 133 {
 134         regs->flags |= (1UL << flag);
 135 }
 136
 137 static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
 138 {
 139         regs->flags &= ~(1UL << flag);
 140 }
 141
 142 static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
 143 {
 144         return !!(regs->flags & (1UL << flag));
 145 }
 146
 147 /*
 148  * These are defined as per linux/ptrace.h, which see.
 149  */
 150 #define arch_has_single_step()  (1)
 151 #define arch_has_block_step()   (1)
 152
 153 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 154 #define instruction_pointer(regs) ((regs)->psw.addr)
 155 #define user_stack_pointer(regs)((regs)->gprs[15])
 156 #define profile_pc(regs) instruction_pointer(regs)
 157
 158 static inline long regs_return_value(struct pt_regs *regs)
 159 {
 160         return regs->gprs[2];
 161 }
 162
 163 static inline void instruction_pointer_set(struct pt_regs *regs,
 164                                            unsigned long val)
 165 {
 166         regs->psw.addr = val;
 167 }
 168
 169 int regs_query_register_offset(const char *name);
 170 const char *regs_query_register_name(unsigned int offset);
 171 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
 172 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
 173
 174 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 175 {
 176         return regs->gprs[15];
 177 }
 178
 179 #endif /* __ASSEMBLY__ */
 180 #endif /* _S390_PTRACE_H */