1 #ifndef __ASM_SH_PTRACE_H
2 #define __ASM_SH_PTRACE_H
5 * Copyright (C) 1999, 2000 Niibe Yutaka
8 #define PTRACE_GETREGS 12 /* General registers */
9 #define PTRACE_SETREGS 13
11 #define PTRACE_GETFPREGS 14 /* FPU registers */
12 #define PTRACE_SETFPREGS 15
14 #define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
16 #define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
17 #define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
19 #define PTRACE_GETDSPREGS 55 /* DSP registers */
20 #define PTRACE_SETDSPREGS 56
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
27 #if defined(__SH5__) || defined(CONFIG_CPU_SH5)
28 #include "ptrace_64.h"
30 #include "ptrace_32.h"
35 #include <linux/stringify.h>
36 #include <linux/stddef.h>
37 #include <linux/thread_info.h>
38 #include <asm/addrspace.h>
40 #include <asm/system.h>
42 #define user_mode(regs) (((regs)->sr & 0x40000000)==0)
43 #define user_stack_pointer(regs) ((unsigned long)(regs)->regs[15])
44 #define kernel_stack_pointer(regs) ((unsigned long)(regs)->regs[15])
45 #define instruction_pointer(regs) ((unsigned long)(regs)->pc)
47 extern void show_regs(struct pt_regs *);
49 #define arch_has_single_step() (1)
52 * kprobe-based event tracer support
54 struct pt_regs_offset {
59 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
60 #define REGS_OFFSET_NAME(num) \
61 {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
62 #define TREGS_OFFSET_NAME(num) \
63 {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
64 #define REG_OFFSET_END {.name = NULL, .offset = 0}
66 /* Query offset/name of register from its name/offset */
67 extern int regs_query_register_offset(const char *name);
68 extern const char *regs_query_register_name(unsigned int offset);
70 extern const struct pt_regs_offset regoffset_table[];
73 * regs_get_register() - get register value from its offset
74 * @regs: pt_regs from which register value is gotten.
75 * @offset: offset number of the register.
77 * regs_get_register returns the value of a register. The @offset is the
78 * offset of the register in struct pt_regs address which specified by @regs.
79 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
81 static inline unsigned long regs_get_register(struct pt_regs *regs,
84 if (unlikely(offset > MAX_REG_OFFSET))
86 return *(unsigned long *)((unsigned long)regs + offset);
90 * regs_within_kernel_stack() - check the address in the stack
91 * @regs: pt_regs which contains kernel stack pointer.
92 * @addr: address which is checked.
94 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
95 * If @addr is within the kernel stack, it returns true. If not, returns false.
97 static inline int regs_within_kernel_stack(struct pt_regs *regs,
100 return ((addr & ~(THREAD_SIZE - 1)) ==
101 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
105 * regs_get_kernel_stack_nth() - get Nth entry of the stack
106 * @regs: pt_regs which contains kernel stack pointer.
107 * @n: stack entry number.
109 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
110 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
113 static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
116 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
118 if (regs_within_kernel_stack(regs, (unsigned long)addr))
125 struct perf_sample_data;
127 extern void ptrace_triggered(struct perf_event *bp, int nmi,
128 struct perf_sample_data *data, struct pt_regs *regs);
130 #define task_pt_regs(task) \
131 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
133 static inline unsigned long profile_pc(struct pt_regs *regs)
135 unsigned long pc = instruction_pointer(regs);
137 if (virt_addr_uncached(pc))
142 #endif /* __KERNEL__ */
144 #endif /* __ASM_SH_PTRACE_H */