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