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 */ 181