File: /usr/src/linux/include/asm-ppc/ptrace.h
1 /*
2 * BK Id: SCCS/s.ptrace.h 1.5 05/17/01 18:14:25 cort
3 */
4 #ifndef _PPC_PTRACE_H
5 #define _PPC_PTRACE_H
6
7 /*
8 * This struct defines the way the registers are stored on the
9 * kernel stack during a system call or other kernel entry.
10 *
11 * this should only contain volatile regs
12 * since we can keep non-volatile in the thread_struct
13 * should set this up when only volatiles are saved
14 * by intr code.
15 *
16 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
17 * that the overall structure is a multiple of 16 bytes in length.
18 *
19 * Note that the offsets of the fields in this struct correspond with
20 * the PT_* values below. This simplifies arch/ppc/kernel/ptrace.c.
21 */
22
23 #ifndef __ASSEMBLY__
24 struct pt_regs {
25 unsigned long gpr[32];
26 unsigned long nip;
27 unsigned long msr;
28 unsigned long orig_gpr3; /* Used for restarting system calls */
29 unsigned long ctr;
30 unsigned long link;
31 unsigned long xer;
32 unsigned long ccr;
33 unsigned long mq; /* 601 only (not used at present) */
34 /* Used on APUS to hold IPL value. */
35 unsigned long trap; /* Reason for being here */
36 unsigned long dar; /* Fault registers */
37 unsigned long dsisr;
38 unsigned long result; /* Result of a system call */
39 };
40 #endif
41
42 #ifdef __KERNEL__
43 #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
44
45 /* Size of stack frame allocated when calling signal handler. */
46 #define __SIGNAL_FRAMESIZE 64
47
48 #define instruction_pointer(regs) ((regs)->nip)
49 #define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
50
51 #endif /* __KERNEL__ */
52
53 /*
54 * Offsets used by 'ptrace' system call interface.
55 * These can't be changed without breaking binary compatibility
56 * with MkLinux, etc.
57 */
58 #define PT_R0 0
59 #define PT_R1 1
60 #define PT_R2 2
61 #define PT_R3 3
62 #define PT_R4 4
63 #define PT_R5 5
64 #define PT_R6 6
65 #define PT_R7 7
66 #define PT_R8 8
67 #define PT_R9 9
68 #define PT_R10 10
69 #define PT_R11 11
70 #define PT_R12 12
71 #define PT_R13 13
72 #define PT_R14 14
73 #define PT_R15 15
74 #define PT_R16 16
75 #define PT_R17 17
76 #define PT_R18 18
77 #define PT_R19 19
78 #define PT_R20 20
79 #define PT_R21 21
80 #define PT_R22 22
81 #define PT_R23 23
82 #define PT_R24 24
83 #define PT_R25 25
84 #define PT_R26 26
85 #define PT_R27 27
86 #define PT_R28 28
87 #define PT_R29 29
88 #define PT_R30 30
89 #define PT_R31 31
90
91 #define PT_NIP 32
92 #define PT_MSR 33
93 #ifdef __KERNEL__
94 #define PT_ORIG_R3 34
95 #endif
96 #define PT_CTR 35
97 #define PT_LNK 36
98 #define PT_XER 37
99 #define PT_CCR 38
100 #define PT_MQ 39
101
102 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */
103 #define PT_FPR31 (PT_FPR0 + 2*31)
104 #define PT_FPSCR (PT_FPR0 + 2*32 + 1)
105
106 #endif
107
108