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 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
  14                          PSW_MASK_EA | PSW_MASK_BA)
  15 #define PSW_USER_BITS   (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
  16                          PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
  17                          PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
  18
  19 /*
  20  * The pt_regs struct defines the way the registers are stored on
  21  * the stack during a system call.
  22  */
  23 struct pt_regs
  24 {
  25         unsigned long args[1];
  26         psw_t psw;
  27         unsigned long gprs[NUM_GPRS];
  28         unsigned long orig_gpr2;
  29         unsigned int int_code;
  30         unsigned int int_parm;
  31         unsigned long int_parm_long;
  32 };
  33
  34 /*
  35  * Program event recording (PER) register set.
  36  */
  37 struct per_regs {
  38         unsigned long control;          /* PER control bits */
  39         unsigned long start;            /* PER starting address */
  40         unsigned long end;              /* PER ending address */
  41 };
  42
  43 /*
  44  * PER event contains information about the cause of the last PER exception.
  45  */
  46 struct per_event {
  47         unsigned short cause;           /* PER code, ATMID and AI */
  48         unsigned long address;          /* PER address */
  49         unsigned char paid;             /* PER access identification */
  50 };
  51
  52 /*
  53  * Simplified per_info structure used to decode the ptrace user space ABI.
  54  */
  55 struct per_struct_kernel {
  56         unsigned long cr9;              /* PER control bits */
  57         unsigned long cr10;             /* PER starting address */
  58         unsigned long cr11;             /* PER ending address */
  59         unsigned long bits;             /* Obsolete software bits */
  60         unsigned long starting_addr;    /* User specified start address */
  61         unsigned long ending_addr;      /* User specified end address */
  62         unsigned short perc_atmid;      /* PER trap ATMID */
  63         unsigned long address;          /* PER trap instruction address */
  64         unsigned char access_id;        /* PER trap access identification */
  65 };
  66
  67 #define PER_EVENT_MASK                  0xEB000000UL
  68
  69 #define PER_EVENT_BRANCH                0x80000000UL
  70 #define PER_EVENT_IFETCH                0x40000000UL
  71 #define PER_EVENT_STORE                 0x20000000UL
  72 #define PER_EVENT_STORE_REAL            0x08000000UL
  73 #define PER_EVENT_TRANSACTION_END       0x02000000UL
  74 #define PER_EVENT_NULLIFICATION         0x01000000UL
  75
  76 #define PER_CONTROL_MASK                0x00e00000UL
  77
  78 #define PER_CONTROL_BRANCH_ADDRESS      0x00800000UL
  79 #define PER_CONTROL_SUSPENSION          0x00400000UL
  80 #define PER_CONTROL_ALTERATION          0x00200000UL
  81
  82 /*
  83  * These are defined as per linux/ptrace.h, which see.
  84  */
  85 #define arch_has_single_step()  (1)
  86
  87 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
  88 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
  89 #define user_stack_pointer(regs)((regs)->gprs[15])
  90 #define profile_pc(regs) instruction_pointer(regs)
  91
  92 static inline long regs_return_value(struct pt_regs *regs)
  93 {
  94         return regs->gprs[2];
  95 }
  96
  97 int regs_query_register_offset(const char *name);
  98 const char *regs_query_register_name(unsigned int offset);
  99 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
 100 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
 101
 102 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
 103 {
 104         return regs->gprs[15] & PSW_ADDR_INSN;
 105 }
 106
 107 #endif /* __ASSEMBLY__ */
 108 #endif /* _S390_PTRACE_H */