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ptrace.h
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1 #ifndef _CRIS_ARCH_PTRACE_H
2 #define _CRIS_ARCH_PTRACE_H
3 
4 /* Register numbers in the ptrace system call interface */
5 
6 #define PT_ORIG_R10 0
7 #define PT_R0 1
8 #define PT_R1 2
9 #define PT_R2 3
10 #define PT_R3 4
11 #define PT_R4 5
12 #define PT_R5 6
13 #define PT_R6 7
14 #define PT_R7 8
15 #define PT_R8 9
16 #define PT_R9 10
17 #define PT_R10 11
18 #define PT_R11 12
19 #define PT_R12 13
20 #define PT_R13 14
21 #define PT_ACR 15
22 #define PT_SRS 16
23 #define PT_MOF 17
24 #define PT_SPC 18
25 #define PT_CCS 19
26 #define PT_SRP 20
27 #define PT_ERP 21 /* This is actually the debugged process' PC */
28 #define PT_EXS 22
29 #define PT_EDA 23
30 #define PT_USP 24 /* special case - USP is not in the pt_regs */
31 #define PT_PPC 25 /* special case - pseudo PC */
32 #define PT_BP 26 /* Base number for BP registers. */
33 #define PT_BP_CTRL 26 /* BP control register. */
34 #define PT_MAX 40
35 
36 /* Condition code bit numbers. */
37 #define C_CCS_BITNR 0
38 #define V_CCS_BITNR 1
39 #define Z_CCS_BITNR 2
40 #define N_CCS_BITNR 3
41 #define X_CCS_BITNR 4
42 #define I_CCS_BITNR 5
43 #define U_CCS_BITNR 6
44 #define P_CCS_BITNR 7
45 #define R_CCS_BITNR 8
46 #define S_CCS_BITNR 9
47 #define M_CCS_BITNR 30
48 #define Q_CCS_BITNR 31
49 #define CCS_SHIFT 10 /* Shift count for each level in CCS */
50 
51 /* pt_regs not only specifices the format in the user-struct during
52  * ptrace but is also the frame format used in the kernel prologue/epilogues
53  * themselves
54  */
55 
56 struct pt_regs {
57  unsigned long orig_r10;
58  /* pushed by movem r13, [sp] in SAVE_ALL. */
59  unsigned long r0;
60  unsigned long r1;
61  unsigned long r2;
62  unsigned long r3;
63  unsigned long r4;
64  unsigned long r5;
65  unsigned long r6;
66  unsigned long r7;
67  unsigned long r8;
68  unsigned long r9;
69  unsigned long r10;
70  unsigned long r11;
71  unsigned long r12;
72  unsigned long r13;
73  unsigned long acr;
74  unsigned long srs;
75  unsigned long mof;
76  unsigned long spc;
77  unsigned long ccs;
78  unsigned long srp;
79  unsigned long erp; /* This is actually the debugged process' PC */
80  /* For debugging purposes; saved only when needed. */
81  unsigned long exs;
82  unsigned long eda;
83 };
84 
85 /* switch_stack is the extra stuff pushed onto the stack in _resume (entry.S)
86  * when doing a context-switch. it is used (apart from in resume) when a new
87  * thread is made and we need to make _resume (which is starting it for the
88  * first time) realise what is going on.
89  *
90  * Actually, the use is very close to the thread struct (TSS) in that both the
91  * switch_stack and the TSS are used to keep thread stuff when switching in
92  * _resume.
93  */
94 
95 struct switch_stack {
96  unsigned long r0;
97  unsigned long r1;
98  unsigned long r2;
99  unsigned long r3;
100  unsigned long r4;
101  unsigned long r5;
102  unsigned long r6;
103  unsigned long r7;
104  unsigned long r8;
105  unsigned long r9;
106  unsigned long return_ip; /* ip that _resume will return to */
107 };
108 
109 #ifdef __KERNEL__
110 
111 #define arch_has_single_step() (1)
112 #define user_mode(regs) (((regs)->ccs & (1 << (U_CCS_BITNR + CCS_SHIFT))) != 0)
113 #define instruction_pointer(regs) ((regs)->erp)
114 #define profile_pc(regs) instruction_pointer(regs)
115 
116 #endif /* __KERNEL__ */
117 
118 #endif
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