1 #ifndef __ASM_SH_PTRACE_H
2 #define __ASM_SH_PTRACE_H
3
4 /*
5 * Copyright (C) 1999, 2000 Niibe Yutaka
6 */
7
8 #define PTRACE_GETREGS 12 /* General registers */
9 #define PTRACE_SETREGS 13
10
11 #define PTRACE_GETFPREGS 14 /* FPU registers */
12 #define PTRACE_SETFPREGS 15
13
14 #define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
15
16 #define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
17 #define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
18
19 #define PTRACE_GETDSPREGS 55 /* DSP registers */
20 #define PTRACE_SETDSPREGS 56
21
22 #define PT_TEXT_END_ADDR 240
23 #define PT_TEXT_ADDR 244 /* &(struct user)->start_code */
24 #define PT_DATA_ADDR 248 /* &(struct user)->start_data */
25 #define PT_TEXT_LEN 252
26
27 #if defined(__SH5__) || defined(CONFIG_CPU_SH5)
28 #include "ptrace_64.h"
29 #else
30 #include "ptrace_32.h"
31 #endif
32
33 #ifdef __KERNEL__
34
35 #include <linux/stringify.h>
36 #include <linux/stddef.h>
37 #include <linux/thread_info.h>
38 #include <asm/addrspace.h>
39 #include <asm/page.h>
40 #include <asm/system.h>
41
42 #define user_mode(regs) (((regs)->sr & 0x40000000)==0)
43 #define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
44
45 #define GET_FP(regs) ((regs)->regs[14])
46 #define GET_USP(regs) ((regs)->regs[15])
47
48 #define arch_has_single_step() (1)
49
50 /*
51 * kprobe-based event tracer support
52 */
53 struct pt_regs_offset {
54 const char *name;
55 int offset;
56 };
57
58 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
59 #define REGS_OFFSET_NAME(num) \
60 {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
61 #define TREGS_OFFSET_NAME(num) \
62 {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
63 #define REG_OFFSET_END {.name = NULL, .offset = 0}
64
65 /* Query offset/name of register from its name/offset */
66 extern int regs_query_register_offset(const char *name);
67 extern const char *regs_query_register_name(unsigned int offset);
68
69 extern const struct pt_regs_offset regoffset_table[];
70
71 /**
72 * regs_get_register() - get register value from its offset
73 * @regs: pt_regs from which register value is gotten.
74 * @offset: offset number of the register.
75 *
76 * regs_get_register returns the value of a register. The @offset is the
77 * offset of the register in struct pt_regs address which specified by @regs.
78 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
79 */
regs_get_register(struct pt_regs * regs,unsigned int offset)80 static inline unsigned long regs_get_register(struct pt_regs *regs,
81 unsigned int offset)
82 {
83 if (unlikely(offset > MAX_REG_OFFSET))
84 return 0;
85 return *(unsigned long *)((unsigned long)regs + offset);
86 }
87
88 /**
89 * regs_within_kernel_stack() - check the address in the stack
90 * @regs: pt_regs which contains kernel stack pointer.
91 * @addr: address which is checked.
92 *
93 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
94 * If @addr is within the kernel stack, it returns true. If not, returns false.
95 */
regs_within_kernel_stack(struct pt_regs * regs,unsigned long addr)96 static inline int regs_within_kernel_stack(struct pt_regs *regs,
97 unsigned long addr)
98 {
99 return ((addr & ~(THREAD_SIZE - 1)) ==
100 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
101 }
102
103 /**
104 * regs_get_kernel_stack_nth() - get Nth entry of the stack
105 * @regs: pt_regs which contains kernel stack pointer.
106 * @n: stack entry number.
107 *
108 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
109 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
110 * this returns 0.
111 */
regs_get_kernel_stack_nth(struct pt_regs * regs,unsigned int n)112 static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
113 unsigned int n)
114 {
115 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
116 addr += n;
117 if (regs_within_kernel_stack(regs, (unsigned long)addr))
118 return *addr;
119 else
120 return 0;
121 }
122
123 struct perf_event;
124 struct perf_sample_data;
125
126 extern void ptrace_triggered(struct perf_event *bp,
127 struct perf_sample_data *data, struct pt_regs *regs);
128
129 #define task_pt_regs(task) \
130 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
131
profile_pc(struct pt_regs * regs)132 static inline unsigned long profile_pc(struct pt_regs *regs)
133 {
134 unsigned long pc = regs->pc;
135
136 if (virt_addr_uncached(pc))
137 return CAC_ADDR(pc);
138
139 return pc;
140 }
141 #define profile_pc profile_pc
142
143 #include <asm-generic/ptrace.h>
144 #endif /* __KERNEL__ */
145
146 #endif /* __ASM_SH_PTRACE_H */
147