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