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1#ifndef _PPC64_PTRACE_H
2#define _PPC64_PTRACE_H
3
4/*
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
6 *
7 * This struct defines the way the registers are stored on the
8 * kernel stack during a system call or other kernel entry.
9 *
10 * this should only contain volatile regs
11 * since we can keep non-volatile in the thread_struct
12 * should set this up when only volatiles are saved
13 * by intr code.
14 *
15 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
16 * that the overall structure is a multiple of 16 bytes in length.
17 *
18 * Note that the offsets of the fields in this struct correspond with
19 * the PT_* values below. This simplifies arch/ppc64/kernel/ptrace.c.
20 *
21 * This program is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU General Public License
23 * as published by the Free Software Foundation; either version
24 * 2 of the License, or (at your option) any later version.
25 */
26
27#ifndef __ASSEMBLY__
28
29struct pt_regs {
30 unsigned long gpr[32];
31 unsigned long nip;
32 unsigned long msr;
33 unsigned long orig_gpr3; /* Used for restarting system calls */
34 unsigned long ctr;
35 unsigned long link;
36 unsigned long xer;
37 unsigned long ccr;
38 unsigned long softe; /* Soft enabled/disabled */
39 unsigned long trap; /* Reason for being here */
40 unsigned long dar; /* Fault registers */
41 unsigned long dsisr;
42 unsigned long result; /* Result of a system call */
43};
44
45struct pt_regs32 {
46 unsigned int gpr[32];
47 unsigned int nip;
48 unsigned int msr;
49 unsigned int orig_gpr3; /* Used for restarting system calls */
50 unsigned int ctr;
51 unsigned int link;
52 unsigned int xer;
53 unsigned int ccr;
54 unsigned int mq; /* 601 only (not used at present) */
55 unsigned int trap; /* Reason for being here */
56 unsigned int dar; /* Fault registers */
57 unsigned int dsisr;
58 unsigned int result; /* Result of a system call */
59};
60
61#ifdef __KERNEL__
62
63#define instruction_pointer(regs) ((regs)->nip)
64
65#ifdef CONFIG_SMP
66extern unsigned long profile_pc(struct pt_regs *regs);
67#else
68#define profile_pc(regs) instruction_pointer(regs)
69#endif
70
71#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
72
73#define force_successful_syscall_return() \
74 (current_thread_info()->syscall_noerror = 1)
75
76/*
77 * We use the least-significant bit of the trap field to indicate
78 * whether we have saved the full set of registers, or only a
79 * partial set. A 1 there means the partial set.
80 */
81#define FULL_REGS(regs) (((regs)->trap & 1) == 0)
82#define TRAP(regs) ((regs)->trap & ~0xF)
83#define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1)
84
85#endif /* __KERNEL__ */
86
87#endif /* __ASSEMBLY__ */
88
89#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
90
91/* Size of dummy stack frame allocated when calling signal handler. */
92#define __SIGNAL_FRAMESIZE 128
93#define __SIGNAL_FRAMESIZE32 64
94
95/*
96 * Offsets used by 'ptrace' system call interface.
97 */
98#define PT_R0 0
99#define PT_R1 1
100#define PT_R2 2
101#define PT_R3 3
102#define PT_R4 4
103#define PT_R5 5
104#define PT_R6 6
105#define PT_R7 7
106#define PT_R8 8
107#define PT_R9 9
108#define PT_R10 10
109#define PT_R11 11
110#define PT_R12 12
111#define PT_R13 13
112#define PT_R14 14
113#define PT_R15 15
114#define PT_R16 16
115#define PT_R17 17
116#define PT_R18 18
117#define PT_R19 19
118#define PT_R20 20
119#define PT_R21 21
120#define PT_R22 22
121#define PT_R23 23
122#define PT_R24 24
123#define PT_R25 25
124#define PT_R26 26
125#define PT_R27 27
126#define PT_R28 28
127#define PT_R29 29
128#define PT_R30 30
129#define PT_R31 31
130
131#define PT_NIP 32
132#define PT_MSR 33
133#ifdef __KERNEL__
134#define PT_ORIG_R3 34
135#endif
136#define PT_CTR 35
137#define PT_LNK 36
138#define PT_XER 37
139#define PT_CCR 38
140#define PT_SOFTE 39
141#define PT_TRAP 40
142#define PT_DAR 41
143#define PT_DSISR 42
144#define PT_RESULT 43
145
146#define PT_FPR0 48
147
148/*
149 * Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will
150 * have visibility to the asm-ppc/ptrace.h header instead of this one.
151 */
152#define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
153
154#ifdef __KERNEL__
155#define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
156#endif
157
158#define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
159#define PT_VSCR (PT_VR0 + 32*2 + 1)
160#define PT_VRSAVE (PT_VR0 + 33*2)
161
162#ifdef __KERNEL__
163#define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
164#define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
165#define PT_VRSAVE_32 (PT_VR0 + 33*4)
166#endif
167
168/*
169 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
170 * The transfer totals 34 quadword. Quadwords 0-31 contain the
171 * corresponding vector registers. Quadword 32 contains the vscr as the
172 * last word (offset 12) within that quadword. Quadword 33 contains the
173 * vrsave as the first word (offset 0) within the quadword.
174 *
175 * This definition of the VMX state is compatible with the current PPC32
176 * ptrace interface. This allows signal handling and ptrace to use the same
177 * structures. This also simplifies the implementation of a bi-arch
178 * (combined (32- and 64-bit) gdb.
179 */
180#define PTRACE_GETVRREGS 18
181#define PTRACE_SETVRREGS 19
182
183/*
184 * While we dont have 64bit book E processors, we need to reserve the
185 * relevant ptrace calls for 32bit compatibility.
186 */
187#if 0
188#define PTRACE_GETEVRREGS 20
189#define PTRACE_SETEVRREGS 21
190#endif
191
192/*
193 * Get or set a debug register. The first 16 are DABR registers and the
194 * second 16 are IABR registers.
195 */
196#define PTRACE_GET_DEBUGREG 25
197#define PTRACE_SET_DEBUGREG 26
198
199/* Additional PTRACE requests implemented on PowerPC. */
200#define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
201#define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
202#define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
203#define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
204
205/* Calls to trace a 64bit program from a 32bit program */
206#define PPC_PTRACE_PEEKTEXT_3264 0x95
207#define PPC_PTRACE_PEEKDATA_3264 0x94
208#define PPC_PTRACE_POKETEXT_3264 0x93
209#define PPC_PTRACE_POKEDATA_3264 0x92
210#define PPC_PTRACE_PEEKUSR_3264 0x91
211#define PPC_PTRACE_POKEUSR_3264 0x90
212
213#endif /* _PPC64_PTRACE_H */