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 */ 179