3 * Copyright IBM Corp. 1999, 2000
4 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
9 #include <linux/const.h>
10 #include <uapi/asm/ptrace.h>
12 #define PIF_SYSCALL 0 /* inside a system call */
13 #define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */
14 #define PIF_SYSCALL_RESTART 2 /* restart the current system call */
16 #define _PIF_SYSCALL _BITUL(PIF_SYSCALL)
17 #define _PIF_PER_TRAP _BITUL(PIF_PER_TRAP)
18 #define _PIF_SYSCALL_RESTART _BITUL(PIF_SYSCALL_RESTART)
22 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
23 PSW_MASK_EA | PSW_MASK_BA)
24 #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
25 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
26 PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
30 unsigned long per : 1; /* PER-Mask */
32 unsigned long dat : 1; /* DAT Mode */
33 unsigned long io : 1; /* Input/Output Mask */
34 unsigned long ext : 1; /* External Mask */
35 unsigned long key : 4; /* PSW Key */
37 unsigned long mcheck : 1; /* Machine-Check Mask */
38 unsigned long wait : 1; /* Wait State */
39 unsigned long pstate : 1; /* Problem State */
40 unsigned long as : 2; /* Address Space Control */
41 unsigned long cc : 2; /* Condition Code */
42 unsigned long pm : 4; /* Program Mask */
43 unsigned long ri : 1; /* Runtime Instrumentation */
45 unsigned long eaba : 2; /* Addressing Mode */
47 unsigned long ia : 64; /* Instruction Address */
51 PSW_BITS_AMODE_24BIT = 0,
52 PSW_BITS_AMODE_31BIT = 1,
53 PSW_BITS_AMODE_64BIT = 3
57 PSW_BITS_AS_PRIMARY = 0,
58 PSW_BITS_AS_ACCREG = 1,
59 PSW_BITS_AS_SECONDARY = 2,
63 #define psw_bits(__psw) (*({ \
64 typecheck(psw_t, __psw); \
65 &(*(struct psw_bits *)(&(__psw))); \
69 * The pt_regs struct defines the way the registers are stored on
70 * the stack during a system call.
74 unsigned long args[1];
76 unsigned long gprs[NUM_GPRS];
77 unsigned long orig_gpr2;
78 unsigned int int_code;
79 unsigned int int_parm;
80 unsigned long int_parm_long;
85 * Program event recording (PER) register set.
88 unsigned long control; /* PER control bits */
89 unsigned long start; /* PER starting address */
90 unsigned long end; /* PER ending address */
94 * PER event contains information about the cause of the last PER exception.
97 unsigned short cause; /* PER code, ATMID and AI */
98 unsigned long address; /* PER address */
99 unsigned char paid; /* PER access identification */
103 * Simplified per_info structure used to decode the ptrace user space ABI.
105 struct per_struct_kernel {
106 unsigned long cr9; /* PER control bits */
107 unsigned long cr10; /* PER starting address */
108 unsigned long cr11; /* PER ending address */
109 unsigned long bits; /* Obsolete software bits */
110 unsigned long starting_addr; /* User specified start address */
111 unsigned long ending_addr; /* User specified end address */
112 unsigned short perc_atmid; /* PER trap ATMID */
113 unsigned long address; /* PER trap instruction address */
114 unsigned char access_id; /* PER trap access identification */
117 #define PER_EVENT_MASK 0xEB000000UL
119 #define PER_EVENT_BRANCH 0x80000000UL
120 #define PER_EVENT_IFETCH 0x40000000UL
121 #define PER_EVENT_STORE 0x20000000UL
122 #define PER_EVENT_STORE_REAL 0x08000000UL
123 #define PER_EVENT_TRANSACTION_END 0x02000000UL
124 #define PER_EVENT_NULLIFICATION 0x01000000UL
126 #define PER_CONTROL_MASK 0x00e00000UL
128 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
129 #define PER_CONTROL_SUSPENSION 0x00400000UL
130 #define PER_CONTROL_ALTERATION 0x00200000UL
132 static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
134 regs->flags |= (1UL << flag);
137 static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
139 regs->flags &= ~(1UL << flag);
142 static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
144 return !!(regs->flags & (1UL << flag));
148 * These are defined as per linux/ptrace.h, which see.
150 #define arch_has_single_step() (1)
151 #define arch_has_block_step() (1)
153 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
154 #define instruction_pointer(regs) ((regs)->psw.addr)
155 #define user_stack_pointer(regs)((regs)->gprs[15])
156 #define profile_pc(regs) instruction_pointer(regs)
158 static inline long regs_return_value(struct pt_regs *regs)
160 return regs->gprs[2];
163 static inline void instruction_pointer_set(struct pt_regs *regs,
166 regs->psw.addr = val;
169 int regs_query_register_offset(const char *name);
170 const char *regs_query_register_name(unsigned int offset);
171 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
172 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
174 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
176 return regs->gprs[15];
179 #endif /* __ASSEMBLY__ */
180 #endif /* _S390_PTRACE_H */