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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 | #define PPC_REG unsigned long | |
29 | struct pt_regs { | |
30 | PPC_REG gpr[32]; | |
31 | PPC_REG nip; | |
32 | PPC_REG msr; | |
33 | PPC_REG orig_gpr3; /* Used for restarting system calls */ | |
34 | PPC_REG ctr; | |
35 | PPC_REG link; | |
36 | PPC_REG xer; | |
37 | PPC_REG ccr; | |
38 | PPC_REG softe; /* Soft enabled/disabled */ | |
39 | PPC_REG trap; /* Reason for being here */ | |
40 | PPC_REG dar; /* Fault registers */ | |
41 | PPC_REG dsisr; | |
42 | PPC_REG result; /* Result of a system call */ | |
43 | }; | |
44 | ||
45 | #define PPC_REG_32 unsigned int | |
46 | struct pt_regs32 { | |
47 | PPC_REG_32 gpr[32]; | |
48 | PPC_REG_32 nip; | |
49 | PPC_REG_32 msr; | |
50 | PPC_REG_32 orig_gpr3; /* Used for restarting system calls */ | |
51 | PPC_REG_32 ctr; | |
52 | PPC_REG_32 link; | |
53 | PPC_REG_32 xer; | |
54 | PPC_REG_32 ccr; | |
55 | PPC_REG_32 mq; /* 601 only (not used at present) */ | |
56 | /* Used on APUS to hold IPL value. */ | |
57 | PPC_REG_32 trap; /* Reason for being here */ | |
58 | PPC_REG_32 dar; /* Fault registers */ | |
59 | PPC_REG_32 dsisr; | |
60 | PPC_REG_32 result; /* Result of a system call */ | |
61 | }; | |
62 | ||
63 | #define instruction_pointer(regs) ((regs)->nip) | |
64 | #ifdef CONFIG_SMP | |
65 | extern unsigned long profile_pc(struct pt_regs *regs); | |
66 | #else | |
67 | #define profile_pc(regs) instruction_pointer(regs) | |
68 | #endif | |
69 | ||
70 | #endif /* __ASSEMBLY__ */ | |
71 | ||
72 | #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ | |
73 | ||
74 | /* Size of dummy stack frame allocated when calling signal handler. */ | |
75 | #define __SIGNAL_FRAMESIZE 128 | |
76 | #define __SIGNAL_FRAMESIZE32 64 | |
77 | ||
78 | #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) | |
79 | ||
80 | #define force_successful_syscall_return() \ | |
81 | (current_thread_info()->syscall_noerror = 1) | |
82 | ||
83 | /* | |
84 | * We use the least-significant bit of the trap field to indicate | |
85 | * whether we have saved the full set of registers, or only a | |
86 | * partial set. A 1 there means the partial set. | |
87 | */ | |
88 | #define FULL_REGS(regs) (((regs)->trap & 1) == 0) | |
89 | #define TRAP(regs) ((regs)->trap & ~0xF) | |
90 | #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1) | |
91 | ||
92 | /* | |
93 | * Offsets used by 'ptrace' system call interface. | |
94 | */ | |
95 | #define PT_R0 0 | |
96 | #define PT_R1 1 | |
97 | #define PT_R2 2 | |
98 | #define PT_R3 3 | |
99 | #define PT_R4 4 | |
100 | #define PT_R5 5 | |
101 | #define PT_R6 6 | |
102 | #define PT_R7 7 | |
103 | #define PT_R8 8 | |
104 | #define PT_R9 9 | |
105 | #define PT_R10 10 | |
106 | #define PT_R11 11 | |
107 | #define PT_R12 12 | |
108 | #define PT_R13 13 | |
109 | #define PT_R14 14 | |
110 | #define PT_R15 15 | |
111 | #define PT_R16 16 | |
112 | #define PT_R17 17 | |
113 | #define PT_R18 18 | |
114 | #define PT_R19 19 | |
115 | #define PT_R20 20 | |
116 | #define PT_R21 21 | |
117 | #define PT_R22 22 | |
118 | #define PT_R23 23 | |
119 | #define PT_R24 24 | |
120 | #define PT_R25 25 | |
121 | #define PT_R26 26 | |
122 | #define PT_R27 27 | |
123 | #define PT_R28 28 | |
124 | #define PT_R29 29 | |
125 | #define PT_R30 30 | |
126 | #define PT_R31 31 | |
127 | ||
128 | #define PT_NIP 32 | |
129 | #define PT_MSR 33 | |
130 | #ifdef __KERNEL__ | |
131 | #define PT_ORIG_R3 34 | |
132 | #endif | |
133 | #define PT_CTR 35 | |
134 | #define PT_LNK 36 | |
135 | #define PT_XER 37 | |
136 | #define PT_CCR 38 | |
137 | #define PT_SOFTE 39 | |
138 | #define PT_RESULT 43 | |
139 | ||
140 | #define PT_FPR0 48 | |
141 | ||
142 | /* Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will have | |
143 | * visibility to the asm-ppc/ptrace.h header instead of this one. | |
144 | */ | |
145 | #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ | |
146 | ||
147 | #ifdef __KERNEL__ | |
148 | #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ | |
149 | #endif | |
150 | ||
151 | #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */ | |
152 | #define PT_VSCR (PT_VR0 + 32*2 + 1) | |
153 | #define PT_VRSAVE (PT_VR0 + 33*2) | |
154 | ||
155 | #ifdef __KERNEL__ | |
156 | #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */ | |
157 | #define PT_VSCR_32 (PT_VR0 + 32*4 + 3) | |
158 | #define PT_VRSAVE_32 (PT_VR0 + 33*4) | |
159 | #endif | |
160 | ||
161 | /* | |
162 | * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. | |
163 | * The transfer totals 34 quadword. Quadwords 0-31 contain the | |
164 | * corresponding vector registers. Quadword 32 contains the vscr as the | |
165 | * last word (offset 12) within that quadword. Quadword 33 contains the | |
166 | * vrsave as the first word (offset 0) within the quadword. | |
167 | * | |
168 | * This definition of the VMX state is compatible with the current PPC32 | |
169 | * ptrace interface. This allows signal handling and ptrace to use the same | |
170 | * structures. This also simplifies the implementation of a bi-arch | |
171 | * (combined (32- and 64-bit) gdb. | |
172 | */ | |
173 | #define PTRACE_GETVRREGS 18 | |
174 | #define PTRACE_SETVRREGS 19 | |
175 | ||
176 | /* Additional PTRACE requests implemented on PowerPC. */ | |
177 | #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ | |
178 | #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ | |
179 | #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ | |
180 | #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ | |
181 | #define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ | |
182 | #define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ | |
183 | #define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ | |
184 | #define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ | |
185 | #define PPC_PTRACE_PEEKUSR_3264 0x91 /* Read a register (specified by ADDR) out of the "user area" on a 64-bit process from a 32-bit process. */ | |
186 | #define PPC_PTRACE_POKEUSR_3264 0x90 /* Write DATA into location ADDR within the "user area" on a 64-bit process from a 32-bit process. */ | |
187 | ||
188 | ||
189 | #endif /* _PPC64_PTRACE_H */ |