| 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 */ |