blob: 65cf3e28e2f42df7a032f59e35744818df27d059 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
#ifndef _ASMAXP_PTRACE_H
#define _ASMAXP_PTRACE_H
/*
* This struct defines the way the registers are stored on the
* kernel stack during a system call or other kernel entry
*
* NOTE! I want to minimize the overhead of system calls, so this
* struct has as little information as possible. I does not have
*
* - floating point regs: the kernel doesn't change those
* - r9-15: saved by the C compiler
*
* This makes "fork()" and "exec()" a bit more complex, but should
* give us low system call latency.
*/
struct pt_regs {
unsigned long r0;
unsigned long r1;
unsigned long r2;
unsigned long r3;
unsigned long r4;
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r19;
unsigned long r20;
unsigned long r21;
unsigned long r22;
unsigned long r23;
unsigned long r24;
unsigned long r25;
unsigned long r26;
unsigned long r27;
unsigned long r28;
unsigned long hae;
/* JRP - These are the values provided to a0-a2 by PALcode */
unsigned long trap_a0;
unsigned long trap_a1;
unsigned long trap_a2;
/* These are saved by PAL-code: */
unsigned long ps;
unsigned long pc;
unsigned long gp;
unsigned long r16;
unsigned long r17;
unsigned long r18;
};
/*
* This is the extended stack used by signal handlers and the context
* switcher: it's pushed after the normal "struct pt_regs".
*/
struct switch_stack {
unsigned long r9;
unsigned long r10;
unsigned long r11;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long r15;
unsigned long r26;
unsigned long fp[32]; /* fp[31] is fpcr */
};
#ifdef __KERNEL__
#define arch_has_single_step() (1)
#define user_mode(regs) (((regs)->ps & 8) != 0)
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs *);
#define task_pt_regs(task) \
((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
#define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
#endif
#endif
|
