1 #ifndef _ASM_POWERPC_PTRACE_H
2 #define _ASM_POWERPC_PTRACE_H
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This struct defines the way the registers are stored on the
8 * kernel stack during a system call or other kernel entry.
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
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.
18 * Note that the offsets of the fields in this struct correspond with
19 * the PT_* values below. This simplifies arch/powerpc/kernel/ptrace.c.
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.
30 unsigned long gpr[32];
33 unsigned long orig_gpr3; /* Used for restarting system calls */
39 unsigned long softe; /* Soft enabled/disabled */
41 unsigned long mq; /* 601 only (not used at present) */
42 /* Used on APUS to hold IPL value. */
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 */
52 #endif /* __ASSEMBLY__ */
58 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
59 #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
65 /* Size of dummy stack frame allocated when calling signal handler. */
66 #define __SIGNAL_FRAMESIZE 128
67 #define __SIGNAL_FRAMESIZE32 64
69 #else /* __powerpc64__ */
71 #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
72 #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
77 /* Size of stack frame allocated when calling signal handler. */
78 #define __SIGNAL_FRAMESIZE 64
80 #endif /* __powerpc64__ */
84 #define instruction_pointer(regs) ((regs)->nip)
85 #define user_stack_pointer(regs) ((regs)->gpr[1])
86 #define regs_return_value(regs) ((regs)->gpr[3])
89 extern unsigned long profile_pc(struct pt_regs *regs);
91 #define profile_pc(regs) instruction_pointer(regs)
95 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
97 #define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
100 #define force_successful_syscall_return() \
102 set_thread_flag(TIF_NOERROR); \
106 extern unsigned long ptrace_get_reg(struct task_struct *task, int regno);
107 extern int ptrace_put_reg(struct task_struct *task, int regno,
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).
117 #define FULL_REGS(regs) (((regs)->trap & 1) == 0)
118 #ifndef __powerpc64__
119 #define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0)
120 #define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0)
121 #define IS_DEBUG_EXC(regs) (((regs)->trap & 8) != 0)
122 #endif /* ! __powerpc64__ */
123 #define TRAP(regs) ((regs)->trap & ~0xF)
125 #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1)
127 #define CHECK_FULL_REGS(regs) \
129 if ((regs)->trap & 1) \
130 printk(KERN_CRIT "%s: partial register set\n", __func__); \
132 #endif /* __powerpc64__ */
135 * These are defined as per linux/ptrace.h, which see.
137 #define arch_has_single_step() (1)
138 extern void user_enable_single_step(struct task_struct *);
139 extern void user_disable_single_step(struct task_struct *);
141 #endif /* __ASSEMBLY__ */
143 #endif /* __KERNEL__ */
146 * Offsets used by 'ptrace' system call interface.
147 * These can't be changed without breaking binary compatibility
185 #define PT_ORIG_R3 34
190 #ifndef __powerpc64__
199 #define PT_REGS_COUNT 44
201 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */
203 #ifndef __powerpc64__
205 #define PT_FPR31 (PT_FPR0 + 2*31)
206 #define PT_FPSCR (PT_FPR0 + 2*32 + 1)
208 #else /* __powerpc64__ */
210 #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
213 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
216 #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
217 #define PT_VSCR (PT_VR0 + 32*2 + 1)
218 #define PT_VRSAVE (PT_VR0 + 33*2)
221 #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
222 #define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
223 #define PT_VRSAVE_32 (PT_VR0 + 33*4)
227 * Only store first 32 VSRs here. The second 32 VSRs in VR0-31
229 #define PT_VSR0 150 /* each VSR reg occupies 2 slots in 64-bit */
230 #define PT_VSR31 (PT_VSR0 + 2*31)
232 #define PT_VSR0_32 300 /* each VSR reg occupies 4 slots in 32-bit */
234 #endif /* __powerpc64__ */
237 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
238 * The transfer totals 34 quadword. Quadwords 0-31 contain the
239 * corresponding vector registers. Quadword 32 contains the vscr as the
240 * last word (offset 12) within that quadword. Quadword 33 contains the
241 * vrsave as the first word (offset 0) within the quadword.
243 * This definition of the VMX state is compatible with the current PPC32
244 * ptrace interface. This allows signal handling and ptrace to use the same
245 * structures. This also simplifies the implementation of a bi-arch
246 * (combined (32- and 64-bit) gdb.
248 #define PTRACE_GETVRREGS 18
249 #define PTRACE_SETVRREGS 19
251 /* Get/set all the upper 32-bits of the SPE registers, accumulator, and
252 * spefscr, in one go */
253 #define PTRACE_GETEVRREGS 20
254 #define PTRACE_SETEVRREGS 21
256 /* Get the first 32 128bit VSX registers */
257 #define PTRACE_GETVSRREGS 27
258 #define PTRACE_SETVSRREGS 28
261 * Get or set a debug register. The first 16 are DABR registers and the
262 * second 16 are IABR registers.
264 #define PTRACE_GET_DEBUGREG 25
265 #define PTRACE_SET_DEBUGREG 26
267 /* (new) PTRACE requests using the same numbers as x86 and the same
268 * argument ordering. Additionally, they support more registers too
270 #define PTRACE_GETREGS 12
271 #define PTRACE_SETREGS 13
272 #define PTRACE_GETFPREGS 14
273 #define PTRACE_SETFPREGS 15
274 #define PTRACE_GETREGS64 22
275 #define PTRACE_SETREGS64 23
277 /* (old) PTRACE requests with inverted arguments */
278 #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
279 #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
280 #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
281 #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
283 /* Calls to trace a 64bit program from a 32bit program */
284 #define PPC_PTRACE_PEEKTEXT_3264 0x95
285 #define PPC_PTRACE_PEEKDATA_3264 0x94
286 #define PPC_PTRACE_POKETEXT_3264 0x93
287 #define PPC_PTRACE_POKEDATA_3264 0x92
288 #define PPC_PTRACE_PEEKUSR_3264 0x91
289 #define PPC_PTRACE_POKEUSR_3264 0x90
291 #endif /* _ASM_POWERPC_PTRACE_H */