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 #ifndef __ASSEMBLY__
  12
  13 extern long psw_kernel_bits;
  14 extern long psw_user_bits;
  15
  16 /*
  17  * The pt_regs struct defines the way the registers are stored on
  18  * the stack during a system call.
  19  */
  20 struct pt_regs
  21 {
  22         unsigned long args[1];
  23         psw_t psw;
  24         unsigned long gprs[NUM_GPRS];
  25         unsigned long orig_gpr2;
  26         unsigned int int_code;
  27         unsigned int int_parm;
  28         unsigned long int_parm_long;
  29 };
  30
  31 /*
  32  * Program event recording (PER) register set.
  33  */
  34 struct per_regs {
  35         unsigned long control;          /* PER control bits */
  36         unsigned long start;            /* PER starting address */
  37         unsigned long end;              /* PER ending address */
  38 };
  39
  40 /*
  41  * PER event contains information about the cause of the last PER exception.
  42  */
  43 struct per_event {
  44         unsigned short cause;           /* PER code, ATMID and AI */
  45         unsigned long address;          /* PER address */
  46         unsigned char paid;             /* PER access identification */
  47 };
  48
  49 /*
  50  * Simplified per_info structure used to decode the ptrace user space ABI.
  51  */
  52 struct per_struct_kernel {
  53         unsigned long cr9;              /* PER control bits */
  54         unsigned long cr10;             /* PER starting address */
  55         unsigned long cr11;             /* PER ending address */
  56         unsigned long bits;             /* Obsolete software bits */
  57         unsigned long starting_addr;    /* User specified start address */
  58         unsigned long ending_addr;      /* User specified end address */
  59         unsigned short perc_atmid;      /* PER trap ATMID */
  60         unsigned long address;          /* PER trap instruction address */
  61         unsigned char access_id;        /* PER trap access identification */
  62 };
  63
  64 #define PER_EVENT_MASK                  0xEB000000UL
  65
  66 #define PER_EVENT_BRANCH                0x80000000UL
  67 #define PER_EVENT_IFETCH                0x40000000UL
  68 #define PER_EVENT_STORE                 0x20000000UL
  69 #define PER_EVENT_STORE_REAL            0x08000000UL
  70 #define PER_EVENT_TRANSACTION_END       0x02000000UL
  71 #define PER_EVENT_NULLIFICATION         0x01000000UL
  72
  73 #define PER_CONTROL_MASK                0x00e00000UL
  74
  75 #define PER_CONTROL_BRANCH_ADDRESS      0x00800000UL
  76 #define PER_CONTROL_SUSPENSION          0x00400000UL
  77 #define PER_CONTROL_ALTERATION          0x00200000UL
  78
  79 /*
  80  * These are defined as per linux/ptrace.h, which see.
  81  */
  82 #define arch_has_single_step()  (1)
  83
  84 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
  85 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
  86 #define user_stack_pointer(regs)((regs)->gprs[15])
  87 #define profile_pc(regs) instruction_pointer(regs)
  88
  89 static inline long regs_return_value(struct pt_regs *regs)
  90 {
  91         return regs->gprs[2];
  92 }
  93
  94 int regs_query_register_offset(const char *name);
  95 const char *regs_query_register_name(unsigned int offset);
  96 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
  97 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
  98
  99 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 100 {
 101         return regs->gprs[15] & PSW_ADDR_INSN;
 102 }
 103
 104 #endif /* __ASSEMBLY__ */
 105 #endif /* _S390_PTRACE_H */