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Stephen Rothwellda80d462005-11-03 15:14:36 +11001#ifndef _ASM_POWERPC_PTRACE_H
2#define _ASM_POWERPC_PTRACE_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
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
Stephen Rothwellda80d462005-11-03 15:14:36 +110019 * the PT_* values below. This simplifies arch/powerpc/kernel/ptrace.c.
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 *
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__
Anton Blancharda0987222005-09-10 16:01:08 +100028
Linus Torvalds1da177e2005-04-16 15:20:36 -070029struct pt_regs {
Anton Blancharda0987222005-09-10 16:01:08 +100030 unsigned long gpr[32];
31 unsigned long nip;
32 unsigned long msr;
Stephen Rothwellda80d462005-11-03 15:14:36 +110033 unsigned long orig_gpr3; /* Used for restarting system calls */
Anton Blancharda0987222005-09-10 16:01:08 +100034 unsigned long ctr;
35 unsigned long link;
36 unsigned long xer;
37 unsigned long ccr;
Stephen Rothwellda80d462005-11-03 15:14:36 +110038#ifdef __powerpc64__
39 unsigned long softe; /* Soft enabled/disabled */
40#else
41 unsigned long mq; /* 601 only (not used at present) */
42 /* Used on APUS to hold IPL value. */
43#endif
44 unsigned long trap; /* Reason for being here */
45 /* N.B. for critical exceptions on 4xx, the dar and dsisr
46 fields are overloaded to hold srr0 and srr1. */
47 unsigned long dar; /* Fault registers */
48 unsigned long dsisr; /* on 4xx/Book-E used for ESR */
49 unsigned long result; /* Result of a system call */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
51
Stephen Rothwellda80d462005-11-03 15:14:36 +110052#endif /* __ASSEMBLY__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Anton Blancharda0987222005-09-10 16:01:08 +100054#ifdef __KERNEL__
55
Stephen Rothwellda80d462005-11-03 15:14:36 +110056#ifdef __powerpc64__
Anton Blancharda0987222005-09-10 16:01:08 +100057
58#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
Benjamin Herrenschmidtec2b36b2008-04-17 14:34:59 +100059#define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */
60#define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265)
61#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \
62 STACK_FRAME_OVERHEAD + 288)
63#define STACK_FRAME_MARKER 12
Anton Blancharda0987222005-09-10 16:01:08 +100064
65/* Size of dummy stack frame allocated when calling signal handler. */
66#define __SIGNAL_FRAMESIZE 128
67#define __SIGNAL_FRAMESIZE32 64
68
Stephen Rothwellda80d462005-11-03 15:14:36 +110069#else /* __powerpc64__ */
70
71#define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
Benjamin Herrenschmidtec2b36b2008-04-17 14:34:59 +100072#define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */
73#define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773)
74#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
75#define STACK_FRAME_MARKER 2
Stephen Rothwellda80d462005-11-03 15:14:36 +110076
77/* Size of stack frame allocated when calling signal handler. */
78#define __SIGNAL_FRAMESIZE 64
79
80#endif /* __powerpc64__ */
81
82#ifndef __ASSEMBLY__
83
84#define instruction_pointer(regs) ((regs)->nip)
Roland McGrathf1ba1282008-07-27 16:51:35 +100085#define user_stack_pointer(regs) ((regs)->gpr[1])
Ananth N Mavinakayanahallib3f827c2006-10-02 02:17:31 -070086#define regs_return_value(regs) ((regs)->gpr[3])
87
Stephen Rothwellda80d462005-11-03 15:14:36 +110088#ifdef CONFIG_SMP
89extern unsigned long profile_pc(struct pt_regs *regs);
90#else
91#define profile_pc(regs) instruction_pointer(regs)
92#endif
93
94#ifdef __powerpc64__
95#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
96#else
97#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
98#endif
99
100#define force_successful_syscall_return() \
101 do { \
David Woodhouse401d1f02005-11-15 18:52:18 +0000102 set_thread_flag(TIF_NOERROR); \
Stephen Rothwellda80d462005-11-03 15:14:36 +1100103 } while(0)
104
Benjamin Herrenschmidt865418d2007-06-04 15:15:44 +1000105struct task_struct;
106extern unsigned long ptrace_get_reg(struct task_struct *task, int regno);
107extern int ptrace_put_reg(struct task_struct *task, int regno,
108 unsigned long data);
109
Stephen Rothwellda80d462005-11-03 15:14:36 +1100110/*
111 * We use the least-significant bit of the trap field to indicate
112 * whether we have saved the full set of registers, or only a
113 * partial set. A 1 there means the partial set.
114 * On 4xx we use the next bit to indicate whether the exception
115 * is a critical exception (1 means it is).
116 */
117#define FULL_REGS(regs) (((regs)->trap & 1) == 0)
118#ifndef __powerpc64__
Benjamin Herrenschmidt47c0bd12007-12-21 15:39:21 +1100119#define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0)
120#define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0)
Kumar Gala663276b2008-04-30 20:44:53 +1000121#define IS_DEBUG_EXC(regs) (((regs)->trap & 8) != 0)
Stephen Rothwellda80d462005-11-03 15:14:36 +1100122#endif /* ! __powerpc64__ */
123#define TRAP(regs) ((regs)->trap & ~0xF)
124#ifdef __powerpc64__
125#define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1)
126#else
127#define CHECK_FULL_REGS(regs) \
128do { \
129 if ((regs)->trap & 1) \
Harvey Harrison653c0312008-10-20 16:00:08 -0700130 printk(KERN_CRIT "%s: partial register set\n", __func__); \
Stephen Rothwellda80d462005-11-03 15:14:36 +1100131} while (0)
132#endif /* __powerpc64__ */
133
Roland McGrath2a84b0d2008-01-30 13:30:51 +0100134/*
135 * These are defined as per linux/ptrace.h, which see.
136 */
137#define arch_has_single_step() (1)
Roland McGrathec097c82009-05-28 21:26:38 +0000138#define arch_has_block_step() (!cpu_has_feature(CPU_FTR_601))
Roland McGrath2a84b0d2008-01-30 13:30:51 +0100139extern void user_enable_single_step(struct task_struct *);
Roland McGrathec097c82009-05-28 21:26:38 +0000140extern void user_enable_block_step(struct task_struct *);
Roland McGrath2a84b0d2008-01-30 13:30:51 +0100141extern void user_disable_single_step(struct task_struct *);
142
Oleg Nesterov25baa352009-12-15 16:47:18 -0800143#define ARCH_HAS_USER_SINGLE_STEP_INFO
144
Stephen Rothwellda80d462005-11-03 15:14:36 +1100145#endif /* __ASSEMBLY__ */
146
147#endif /* __KERNEL__ */
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149/*
150 * Offsets used by 'ptrace' system call interface.
Stephen Rothwellda80d462005-11-03 15:14:36 +1100151 * These can't be changed without breaking binary compatibility
152 * with MkLinux, etc.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 */
154#define PT_R0 0
155#define PT_R1 1
156#define PT_R2 2
157#define PT_R3 3
158#define PT_R4 4
159#define PT_R5 5
160#define PT_R6 6
161#define PT_R7 7
162#define PT_R8 8
163#define PT_R9 9
164#define PT_R10 10
165#define PT_R11 11
166#define PT_R12 12
167#define PT_R13 13
168#define PT_R14 14
169#define PT_R15 15
170#define PT_R16 16
171#define PT_R17 17
172#define PT_R18 18
173#define PT_R19 19
174#define PT_R20 20
175#define PT_R21 21
176#define PT_R22 22
177#define PT_R23 23
178#define PT_R24 24
179#define PT_R25 25
180#define PT_R26 26
181#define PT_R27 27
182#define PT_R28 28
183#define PT_R29 29
184#define PT_R30 30
185#define PT_R31 31
186
187#define PT_NIP 32
188#define PT_MSR 33
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189#define PT_ORIG_R3 34
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190#define PT_CTR 35
191#define PT_LNK 36
192#define PT_XER 37
193#define PT_CCR 38
Stephen Rothwellda80d462005-11-03 15:14:36 +1100194#ifndef __powerpc64__
195#define PT_MQ 39
196#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197#define PT_SOFTE 39
Benjamin Herrenschmidte17666b2007-06-04 15:15:43 +1000198#endif
Anton Blancharda0987222005-09-10 16:01:08 +1000199#define PT_TRAP 40
200#define PT_DAR 41
201#define PT_DSISR 42
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202#define PT_RESULT 43
Benjamin Herrenschmidte17666b2007-06-04 15:15:43 +1000203#define PT_REGS_COUNT 44
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Stephen Rothwellda80d462005-11-03 15:14:36 +1100205#define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Stephen Rothwellda80d462005-11-03 15:14:36 +1100207#ifndef __powerpc64__
208
209#define PT_FPR31 (PT_FPR0 + 2*31)
210#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
211
212#else /* __powerpc64__ */
213
Anton Blancharda0987222005-09-10 16:01:08 +1000214#define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216#ifdef __KERNEL__
Anton Blancharda0987222005-09-10 16:01:08 +1000217#define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218#endif
219
220#define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
221#define PT_VSCR (PT_VR0 + 32*2 + 1)
222#define PT_VRSAVE (PT_VR0 + 33*2)
223
224#ifdef __KERNEL__
225#define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
226#define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
227#define PT_VRSAVE_32 (PT_VR0 + 33*4)
228#endif
229
Michael Neulingce48b212008-06-25 14:07:18 +1000230/*
231 * Only store first 32 VSRs here. The second 32 VSRs in VR0-31
232 */
233#define PT_VSR0 150 /* each VSR reg occupies 2 slots in 64-bit */
234#define PT_VSR31 (PT_VSR0 + 2*31)
235#ifdef __KERNEL__
236#define PT_VSR0_32 300 /* each VSR reg occupies 4 slots in 32-bit */
237#endif
Stephen Rothwellda80d462005-11-03 15:14:36 +1100238#endif /* __powerpc64__ */
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240/*
Stephen Rothwellda80d462005-11-03 15:14:36 +1100241 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
242 * The transfer totals 34 quadword. Quadwords 0-31 contain the
243 * corresponding vector registers. Quadword 32 contains the vscr as the
244 * last word (offset 12) within that quadword. Quadword 33 contains the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 * vrsave as the first word (offset 0) within the quadword.
246 *
Stephen Rothwellda80d462005-11-03 15:14:36 +1100247 * This definition of the VMX state is compatible with the current PPC32
248 * ptrace interface. This allows signal handling and ptrace to use the same
249 * structures. This also simplifies the implementation of a bi-arch
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 * (combined (32- and 64-bit) gdb.
251 */
252#define PTRACE_GETVRREGS 18
253#define PTRACE_SETVRREGS 19
254
Stephen Rothwellda80d462005-11-03 15:14:36 +1100255/* Get/set all the upper 32-bits of the SPE registers, accumulator, and
256 * spefscr, in one go */
257#define PTRACE_GETEVRREGS 20
258#define PTRACE_SETEVRREGS 21
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Michael Neulingce48b212008-06-25 14:07:18 +1000260/* Get the first 32 128bit VSX registers */
261#define PTRACE_GETVSRREGS 27
262#define PTRACE_SETVSRREGS 28
263
Anton Blancharda94d3082005-09-10 16:01:10 +1000264/*
265 * Get or set a debug register. The first 16 are DABR registers and the
266 * second 16 are IABR registers.
267 */
268#define PTRACE_GET_DEBUGREG 25
269#define PTRACE_SET_DEBUGREG 26
270
Benjamin Herrenschmidte17666b2007-06-04 15:15:43 +1000271/* (new) PTRACE requests using the same numbers as x86 and the same
272 * argument ordering. Additionally, they support more registers too
273 */
274#define PTRACE_GETREGS 12
275#define PTRACE_SETREGS 13
276#define PTRACE_GETFPREGS 14
277#define PTRACE_SETFPREGS 15
278#define PTRACE_GETREGS64 22
279#define PTRACE_SETREGS64 23
280
281/* (old) PTRACE requests with inverted arguments */
Anton Blancharda0987222005-09-10 16:01:08 +1000282#define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
283#define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
284#define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
285#define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
286
287/* Calls to trace a 64bit program from a 32bit program */
288#define PPC_PTRACE_PEEKTEXT_3264 0x95
289#define PPC_PTRACE_PEEKDATA_3264 0x94
290#define PPC_PTRACE_POKETEXT_3264 0x93
291#define PPC_PTRACE_POKEDATA_3264 0x92
292#define PPC_PTRACE_PEEKUSR_3264 0x91
293#define PPC_PTRACE_POKEUSR_3264 0x90
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Roland McGrathec097c82009-05-28 21:26:38 +0000295#define PTRACE_SINGLEBLOCK 0x100 /* resume execution until next branch */
296
Stephen Rothwellda80d462005-11-03 15:14:36 +1100297#endif /* _ASM_POWERPC_PTRACE_H */