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 <linux/const.h>
10 #include <uapi/asm/ptrace.h>
11
12 #define PIF_SYSCALL 0 /* inside a system call */
13 #define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */
14
15 #define _PIF_SYSCALL _BITUL(PIF_SYSCALL)
16 #define _PIF_PER_TRAP _BITUL(PIF_PER_TRAP)
17
18 #ifndef __ASSEMBLY__
19
20 #define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
21 PSW_MASK_EA | PSW_MASK_BA)
22 #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
23 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
24 PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
25
26 struct psw_bits {
27 unsigned long long : 1;
28 unsigned long long r : 1; /* PER-Mask */
29 unsigned long long : 3;
30 unsigned long long t : 1; /* DAT Mode */
31 unsigned long long i : 1; /* Input/Output Mask */
32 unsigned long long e : 1; /* External Mask */
33 unsigned long long key : 4; /* PSW Key */
34 unsigned long long : 1;
35 unsigned long long m : 1; /* Machine-Check Mask */
36 unsigned long long w : 1; /* Wait State */
37 unsigned long long p : 1; /* Problem State */
38 unsigned long long as : 2; /* Address Space Control */
39 unsigned long long cc : 2; /* Condition Code */
40 unsigned long long pm : 4; /* Program Mask */
41 unsigned long long ri : 1; /* Runtime Instrumentation */
42 unsigned long long : 6;
43 unsigned long long eaba : 2; /* Addressing Mode */
44 unsigned long long : 31;
45 unsigned long long ia : 64;/* Instruction Address */
46 };
47
48 enum {
49 PSW_AMODE_24BIT = 0,
50 PSW_AMODE_31BIT = 1,
51 PSW_AMODE_64BIT = 3
52 };
53
54 enum {
55 PSW_AS_PRIMARY = 0,
56 PSW_AS_ACCREG = 1,
57 PSW_AS_SECONDARY = 2,
58 PSW_AS_HOME = 3
59 };
60
61 #define psw_bits(__psw) (*({ \
62 typecheck(psw_t, __psw); \
63 &(*(struct psw_bits *)(&(__psw))); \
64 }))
65
66 /*
67 * The pt_regs struct defines the way the registers are stored on
68 * the stack during a system call.
69 */
70 struct pt_regs
71 {
72 unsigned long args[1];
73 psw_t psw;
74 unsigned long gprs[NUM_GPRS];
75 unsigned long orig_gpr2;
76 unsigned int int_code;
77 unsigned int int_parm;
78 unsigned long int_parm_long;
79 unsigned long flags;
80 };
81
82 /*
83 * Program event recording (PER) register set.
84 */
85 struct per_regs {
86 unsigned long control; /* PER control bits */
87 unsigned long start; /* PER starting address */
88 unsigned long end; /* PER ending address */
89 };
90
91 /*
92 * PER event contains information about the cause of the last PER exception.
93 */
94 struct per_event {
95 unsigned short cause; /* PER code, ATMID and AI */
96 unsigned long address; /* PER address */
97 unsigned char paid; /* PER access identification */
98 };
99
100 /*
101 * Simplified per_info structure used to decode the ptrace user space ABI.
102 */
103 struct per_struct_kernel {
104 unsigned long cr9; /* PER control bits */
105 unsigned long cr10; /* PER starting address */
106 unsigned long cr11; /* PER ending address */
107 unsigned long bits; /* Obsolete software bits */
108 unsigned long starting_addr; /* User specified start address */
109 unsigned long ending_addr; /* User specified end address */
110 unsigned short perc_atmid; /* PER trap ATMID */
111 unsigned long address; /* PER trap instruction address */
112 unsigned char access_id; /* PER trap access identification */
113 };
114
115 #define PER_EVENT_MASK 0xEB000000UL
116
117 #define PER_EVENT_BRANCH 0x80000000UL
118 #define PER_EVENT_IFETCH 0x40000000UL
119 #define PER_EVENT_STORE 0x20000000UL
120 #define PER_EVENT_STORE_REAL 0x08000000UL
121 #define PER_EVENT_TRANSACTION_END 0x02000000UL
122 #define PER_EVENT_NULLIFICATION 0x01000000UL
123
124 #define PER_CONTROL_MASK 0x00e00000UL
125
126 #define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
127 #define PER_CONTROL_SUSPENSION 0x00400000UL
128 #define PER_CONTROL_ALTERATION 0x00200000UL
129
set_pt_regs_flag(struct pt_regs * regs,int flag)130 static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
131 {
132 regs->flags |= (1UL << flag);
133 }
134
clear_pt_regs_flag(struct pt_regs * regs,int flag)135 static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
136 {
137 regs->flags &= ~(1UL << flag);
138 }
139
test_pt_regs_flag(struct pt_regs * regs,int flag)140 static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
141 {
142 return !!(regs->flags & (1UL << flag));
143 }
144
145 /*
146 * These are defined as per linux/ptrace.h, which see.
147 */
148 #define arch_has_single_step() (1)
149 #define arch_has_block_step() (1)
150
151 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
152 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
153 #define user_stack_pointer(regs)((regs)->gprs[15])
154 #define profile_pc(regs) instruction_pointer(regs)
155
regs_return_value(struct pt_regs * regs)156 static inline long regs_return_value(struct pt_regs *regs)
157 {
158 return regs->gprs[2];
159 }
160
instruction_pointer_set(struct pt_regs * regs,unsigned long val)161 static inline void instruction_pointer_set(struct pt_regs *regs,
162 unsigned long val)
163 {
164 regs->psw.addr = val | PSW_ADDR_AMODE;
165 }
166
167 int regs_query_register_offset(const char *name);
168 const char *regs_query_register_name(unsigned int offset);
169 unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
170 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
171
kernel_stack_pointer(struct pt_regs * regs)172 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
173 {
174 return regs->gprs[15] & PSW_ADDR_INSN;
175 }
176
177 #endif /* __ASSEMBLY__ */
178 #endif /* _S390_PTRACE_H */
179