1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * S390 version 4 * Copyright IBM Corp. 1999, 2000 5 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 6 */ 7 #ifndef _S390_PTRACE_H 8 #define _S390_PTRACE_H 9 10 #include <linux/const.h> 11 #include <uapi/asm/ptrace.h> 12 13 #define PIF_SYSCALL 0 /* inside a system call */ 14 #define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */ 15 #define PIF_SYSCALL_RESTART 2 /* restart the current system call */ 16 #define PIF_GUEST_FAULT 3 /* indicates program check in sie64a */ 17 18 #define _PIF_SYSCALL _BITUL(PIF_SYSCALL) 19 #define _PIF_PER_TRAP _BITUL(PIF_PER_TRAP) 20 #define _PIF_SYSCALL_RESTART _BITUL(PIF_SYSCALL_RESTART) 21 #define _PIF_GUEST_FAULT _BITUL(PIF_GUEST_FAULT) 22 23 #ifndef __ASSEMBLY__ 24 25 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \ 26 PSW_MASK_EA | PSW_MASK_BA) 27 #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \ 28 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \ 29 PSW_MASK_PSTATE | PSW_ASC_PRIMARY) 30 31 struct psw_bits { 32 unsigned long : 1; 33 unsigned long per : 1; /* PER-Mask */ 34 unsigned long : 3; 35 unsigned long dat : 1; /* DAT Mode */ 36 unsigned long io : 1; /* Input/Output Mask */ 37 unsigned long ext : 1; /* External Mask */ 38 unsigned long key : 4; /* PSW Key */ 39 unsigned long : 1; 40 unsigned long mcheck : 1; /* Machine-Check Mask */ 41 unsigned long wait : 1; /* Wait State */ 42 unsigned long pstate : 1; /* Problem State */ 43 unsigned long as : 2; /* Address Space Control */ 44 unsigned long cc : 2; /* Condition Code */ 45 unsigned long pm : 4; /* Program Mask */ 46 unsigned long ri : 1; /* Runtime Instrumentation */ 47 unsigned long : 6; 48 unsigned long eaba : 2; /* Addressing Mode */ 49 unsigned long : 31; 50 unsigned long ia : 64; /* Instruction Address */ 51 }; 52 53 enum { 54 PSW_BITS_AMODE_24BIT = 0, 55 PSW_BITS_AMODE_31BIT = 1, 56 PSW_BITS_AMODE_64BIT = 3 57 }; 58 59 enum { 60 PSW_BITS_AS_PRIMARY = 0, 61 PSW_BITS_AS_ACCREG = 1, 62 PSW_BITS_AS_SECONDARY = 2, 63 PSW_BITS_AS_HOME = 3 64 }; 65 66 #define psw_bits(__psw) (*({ \ 67 typecheck(psw_t, __psw); \ 68 &(*(struct psw_bits *)(&(__psw))); \ 69 })) 70 71 /* 72 * The pt_regs struct defines the way the registers are stored on 73 * the stack during a system call. 74 */ 75 struct pt_regs 76 { 77 union { 78 user_pt_regs user_regs; 79 struct { 80 unsigned long args[1]; 81 psw_t psw; 82 unsigned long gprs[NUM_GPRS]; 83 }; 84 }; 85 unsigned long orig_gpr2; 86 unsigned int int_code; 87 unsigned int int_parm; 88 unsigned long int_parm_long; 89 unsigned long flags; 90 }; 91 92 /* 93 * Program event recording (PER) register set. 94 */ 95 struct per_regs { 96 unsigned long control; /* PER control bits */ 97 unsigned long start; /* PER starting address */ 98 unsigned long end; /* PER ending address */ 99 }; 100 101 /* 102 * PER event contains information about the cause of the last PER exception. 103 */ 104 struct per_event { 105 unsigned short cause; /* PER code, ATMID and AI */ 106 unsigned long address; /* PER address */ 107 unsigned char paid; /* PER access identification */ 108 }; 109 110 /* 111 * Simplified per_info structure used to decode the ptrace user space ABI. 112 */ 113 struct per_struct_kernel { 114 unsigned long cr9; /* PER control bits */ 115 unsigned long cr10; /* PER starting address */ 116 unsigned long cr11; /* PER ending address */ 117 unsigned long bits; /* Obsolete software bits */ 118 unsigned long starting_addr; /* User specified start address */ 119 unsigned long ending_addr; /* User specified end address */ 120 unsigned short perc_atmid; /* PER trap ATMID */ 121 unsigned long address; /* PER trap instruction address */ 122 unsigned char access_id; /* PER trap access identification */ 123 }; 124 125 #define PER_EVENT_MASK 0xEB000000UL 126 127 #define PER_EVENT_BRANCH 0x80000000UL 128 #define PER_EVENT_IFETCH 0x40000000UL 129 #define PER_EVENT_STORE 0x20000000UL 130 #define PER_EVENT_STORE_REAL 0x08000000UL 131 #define PER_EVENT_TRANSACTION_END 0x02000000UL 132 #define PER_EVENT_NULLIFICATION 0x01000000UL 133 134 #define PER_CONTROL_MASK 0x00e00000UL 135 136 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL 137 #define PER_CONTROL_SUSPENSION 0x00400000UL 138 #define PER_CONTROL_ALTERATION 0x00200000UL 139 140 static inline void set_pt_regs_flag(struct pt_regs *regs, int flag) 141 { 142 regs->flags |= (1UL << flag); 143 } 144 145 static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag) 146 { 147 regs->flags &= ~(1UL << flag); 148 } 149 150 static inline int test_pt_regs_flag(struct pt_regs *regs, int flag) 151 { 152 return !!(regs->flags & (1UL << flag)); 153 } 154 155 /* 156 * These are defined as per linux/ptrace.h, which see. 157 */ 158 #define arch_has_single_step() (1) 159 #define arch_has_block_step() (1) 160 161 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) 162 #define instruction_pointer(regs) ((regs)->psw.addr) 163 #define user_stack_pointer(regs)((regs)->gprs[15]) 164 #define profile_pc(regs) instruction_pointer(regs) 165 166 static inline long regs_return_value(struct pt_regs *regs) 167 { 168 return regs->gprs[2]; 169 } 170 171 static inline void instruction_pointer_set(struct pt_regs *regs, 172 unsigned long val) 173 { 174 regs->psw.addr = val; 175 } 176 177 int regs_query_register_offset(const char *name); 178 const char *regs_query_register_name(unsigned int offset); 179 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset); 180 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); 181 182 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 183 { 184 return regs->gprs[15]; 185 } 186 187 #endif /* __ASSEMBLY__ */ 188 #endif /* _S390_PTRACE_H */ 189