1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 */
9 #ifndef _ASM_PTRACE_H
10 #define _ASM_PTRACE_H
11
12 /* 0 - 31 are integer registers, 32 - 63 are fp registers. */
13 #define FPR_BASE 32
14 #define PC 64
15 #define CAUSE 65
16 #define BADVADDR 66
17 #define MMHI 67
18 #define MMLO 68
19 #define FPC_CSR 69
20 #define FPC_EIR 70
21 #define DSP_BASE 71 /* 3 more hi / lo register pairs */
22 #define DSP_CONTROL 77
23 #define ACX 78
24
25 /*
26 * This struct defines the way the registers are stored on the stack during a
27 * system call/exception. As usual the registers k0/k1 aren't being saved.
28 */
29 struct pt_regs {
30 #ifdef CONFIG_32BIT
31 /* Pad bytes for argument save space on the stack. */
32 unsigned long pad0[6];
33 #endif
34
35 /* Saved main processor registers. */
36 unsigned long regs[32];
37
38 /* Saved special registers. */
39 unsigned long cp0_status;
40 unsigned long hi;
41 unsigned long lo;
42 #ifdef CONFIG_CPU_HAS_SMARTMIPS
43 unsigned long acx;
44 #endif
45 unsigned long cp0_badvaddr;
46 unsigned long cp0_cause;
47 unsigned long cp0_epc;
48 #ifdef CONFIG_MIPS_MT_SMTC
49 unsigned long cp0_tcstatus;
50 #endif /* CONFIG_MIPS_MT_SMTC */
51 #ifdef CONFIG_CPU_CAVIUM_OCTEON
52 unsigned long long mpl[3]; /* MTM{0,1,2} */
53 unsigned long long mtp[3]; /* MTP{0,1,2} */
54 #endif
55 } __attribute__ ((aligned (8)));
56
57 /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
58 #define PTRACE_GETREGS 12
59 #define PTRACE_SETREGS 13
60 #define PTRACE_GETFPREGS 14
61 #define PTRACE_SETFPREGS 15
62 /* #define PTRACE_GETFPXREGS 18 */
63 /* #define PTRACE_SETFPXREGS 19 */
64
65 #define PTRACE_OLDSETOPTIONS 21
66
67 #define PTRACE_GET_THREAD_AREA 25
68 #define PTRACE_SET_THREAD_AREA 26
69
70 /* Calls to trace a 64bit program from a 32bit program. */
71 #define PTRACE_PEEKTEXT_3264 0xc0
72 #define PTRACE_PEEKDATA_3264 0xc1
73 #define PTRACE_POKETEXT_3264 0xc2
74 #define PTRACE_POKEDATA_3264 0xc3
75 #define PTRACE_GET_THREAD_AREA_3264 0xc4
76
77 /* Read and write watchpoint registers. */
78 enum pt_watch_style {
79 pt_watch_style_mips32,
80 pt_watch_style_mips64
81 };
82 struct mips32_watch_regs {
83 unsigned int watchlo[8];
84 /* Lower 16 bits of watchhi. */
85 unsigned short watchhi[8];
86 /* Valid mask and I R W bits.
87 * bit 0 -- 1 if W bit is usable.
88 * bit 1 -- 1 if R bit is usable.
89 * bit 2 -- 1 if I bit is usable.
90 * bits 3 - 11 -- Valid watchhi mask bits.
91 */
92 unsigned short watch_masks[8];
93 /* The number of valid watch register pairs. */
94 unsigned int num_valid;
95 } __attribute__((aligned(8)));
96
97 struct mips64_watch_regs {
98 unsigned long long watchlo[8];
99 unsigned short watchhi[8];
100 unsigned short watch_masks[8];
101 unsigned int num_valid;
102 } __attribute__((aligned(8)));
103
104 struct pt_watch_regs {
105 enum pt_watch_style style;
106 union {
107 struct mips32_watch_regs mips32;
108 struct mips64_watch_regs mips64;
109 };
110 };
111
112 #define PTRACE_GET_WATCH_REGS 0xd0
113 #define PTRACE_SET_WATCH_REGS 0xd1
114
115 #ifdef __KERNEL__
116
117 #include <linux/compiler.h>
118 #include <linux/linkage.h>
119 #include <linux/types.h>
120 #include <asm/isadep.h>
121
122 struct task_struct;
123
124 extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
125 extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
126
127 extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
128 extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
129
130 extern int ptrace_get_watch_regs(struct task_struct *child,
131 struct pt_watch_regs __user *addr);
132 extern int ptrace_set_watch_regs(struct task_struct *child,
133 struct pt_watch_regs __user *addr);
134
135 /*
136 * Does the process account for user or for system time?
137 */
138 #define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
139
140 #define instruction_pointer(regs) ((regs)->cp0_epc)
141 #define profile_pc(regs) instruction_pointer(regs)
142
143 extern asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit);
144
145 extern NORET_TYPE void die(const char *, const struct pt_regs *) ATTRIB_NORET;
146
die_if_kernel(const char * str,const struct pt_regs * regs)147 static inline void die_if_kernel(const char *str, const struct pt_regs *regs)
148 {
149 if (unlikely(!user_mode(regs)))
150 die(str, regs);
151 }
152
153 #endif
154
155 #endif /* _ASM_PTRACE_H */
156