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 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \ 14 PSW_MASK_EA | PSW_MASK_BA) 15 #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \ 16 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \ 17 PSW_MASK_PSTATE | PSW_ASC_PRIMARY) 18 19 /* 20 * The pt_regs struct defines the way the registers are stored on 21 * the stack during a system call. 22 */ 23 struct pt_regs 24 { 25 unsigned long args[1]; 26 psw_t psw; 27 unsigned long gprs[NUM_GPRS]; 28 unsigned long orig_gpr2; 29 unsigned int int_code; 30 unsigned int int_parm; 31 unsigned long int_parm_long; 32 }; 33 34 /* 35 * Program event recording (PER) register set. 36 */ 37 struct per_regs { 38 unsigned long control; /* PER control bits */ 39 unsigned long start; /* PER starting address */ 40 unsigned long end; /* PER ending address */ 41 }; 42 43 /* 44 * PER event contains information about the cause of the last PER exception. 45 */ 46 struct per_event { 47 unsigned short cause; /* PER code, ATMID and AI */ 48 unsigned long address; /* PER address */ 49 unsigned char paid; /* PER access identification */ 50 }; 51 52 /* 53 * Simplified per_info structure used to decode the ptrace user space ABI. 54 */ 55 struct per_struct_kernel { 56 unsigned long cr9; /* PER control bits */ 57 unsigned long cr10; /* PER starting address */ 58 unsigned long cr11; /* PER ending address */ 59 unsigned long bits; /* Obsolete software bits */ 60 unsigned long starting_addr; /* User specified start address */ 61 unsigned long ending_addr; /* User specified end address */ 62 unsigned short perc_atmid; /* PER trap ATMID */ 63 unsigned long address; /* PER trap instruction address */ 64 unsigned char access_id; /* PER trap access identification */ 65 }; 66 67 #define PER_EVENT_MASK 0xEB000000UL 68 69 #define PER_EVENT_BRANCH 0x80000000UL 70 #define PER_EVENT_IFETCH 0x40000000UL 71 #define PER_EVENT_STORE 0x20000000UL 72 #define PER_EVENT_STORE_REAL 0x08000000UL 73 #define PER_EVENT_TRANSACTION_END 0x02000000UL 74 #define PER_EVENT_NULLIFICATION 0x01000000UL 75 76 #define PER_CONTROL_MASK 0x00e00000UL 77 78 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL 79 #define PER_CONTROL_SUSPENSION 0x00400000UL 80 #define PER_CONTROL_ALTERATION 0x00200000UL 81 82 /* 83 * These are defined as per linux/ptrace.h, which see. 84 */ 85 #define arch_has_single_step() (1) 86 #define arch_has_block_step() (1) 87 88 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0) 89 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN) 90 #define user_stack_pointer(regs)((regs)->gprs[15]) 91 #define profile_pc(regs) instruction_pointer(regs) 92 93 static inline long regs_return_value(struct pt_regs *regs) 94 { 95 return regs->gprs[2]; 96 } 97 98 int regs_query_register_offset(const char *name); 99 const char *regs_query_register_name(unsigned int offset); 100 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset); 101 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); 102 103 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) 104 { 105 return regs->gprs[15] & PSW_ADDR_INSN; 106 } 107 108 #endif /* __ASSEMBLY__ */ 109 #endif /* _S390_PTRACE_H */ 110