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 #ifndef __s390x__ 13 #else /* __s390x__ */ 14 #endif /* __s390x__ */ 15 extern long psw_kernel_bits; 16 extern long psw_user_bits; 17 18 /* 19 * The pt_regs struct defines the way the registers are stored on 20 * the stack during a system call. 21 */ 22 struct pt_regs 23 { 24 unsigned long args[1]; 25 psw_t psw; 26 unsigned long gprs[NUM_GPRS]; 27 unsigned long orig_gpr2; 28 unsigned int int_code; 29 unsigned long int_parm_long; 30 }; 31 32 /* 33 * Program event recording (PER) register set. 34 */ 35 struct per_regs { 36 unsigned long control; /* PER control bits */ 37 unsigned long start; /* PER starting address */ 38 unsigned long end; /* PER ending address */ 39 }; 40 41 /* 42 * PER event contains information about the cause of the last PER exception. 43 */ 44 struct per_event { 45 unsigned short cause; /* PER code, ATMID and AI */ 46 unsigned long address; /* PER address */ 47 unsigned char paid; /* PER access identification */ 48 }; 49 50 /* 51 * Simplified per_info structure used to decode the ptrace user space ABI. 52 */ 53 struct per_struct_kernel { 54 unsigned long cr9; /* PER control bits */ 55 unsigned long cr10; /* PER starting address */ 56 unsigned long cr11; /* PER ending address */ 57 unsigned long bits; /* Obsolete software bits */ 58 unsigned long starting_addr; /* User specified start address */ 59 unsigned long ending_addr; /* User specified end address */ 60 unsigned short perc_atmid; /* PER trap ATMID */ 61 unsigned long address; /* PER trap instruction address */ 62 unsigned char access_id; /* PER trap access identification */ 63 }; 64 65 #define PER_EVENT_MASK 0xEB000000UL 66 67 #define PER_EVENT_BRANCH 0x80000000UL 68 #define PER_EVENT_IFETCH 0x40000000UL 69 #define PER_EVENT_STORE 0x20000000UL 70 #define PER_EVENT_STORE_REAL 0x08000000UL 71 #define PER_EVENT_TRANSACTION_END 0x02000000UL 72 #define PER_EVENT_NULLIFICATION 0x01000000UL 73 74 #define PER_CONTROL_MASK 0x00e00000UL 75 76 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL 77 #define PER_CONTROL_SUSPENSION 0x00400000UL 78 #define PER_CONTROL_ALTERATION 0x00200000UL 79 80 #ifdef __s390x__ 81 #endif /* __s390x__ */ 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 */ 109