1 #ifndef _PPC64_PTRACE_H
2 #define _PPC64_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/ppc64/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 */
38 unsigned long softe
; /* Soft enabled/disabled */
39 unsigned long trap
; /* Reason for being here */
40 unsigned long dar
; /* Fault registers */
42 unsigned long result
; /* Result of a system call */
49 unsigned int orig_gpr3
; /* Used for restarting system calls */
54 unsigned int mq
; /* 601 only (not used at present) */
55 unsigned int trap
; /* Reason for being here */
56 unsigned int dar
; /* Fault registers */
58 unsigned int result
; /* Result of a system call */
63 #define instruction_pointer(regs) ((regs)->nip)
66 extern unsigned long profile_pc(struct pt_regs
*regs
);
68 #define profile_pc(regs) instruction_pointer(regs)
71 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
73 #define force_successful_syscall_return() \
74 (current_thread_info()->syscall_noerror = 1)
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.
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)
85 #endif /* __KERNEL__ */
87 #endif /* __ASSEMBLY__ */
89 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
91 /* Size of dummy stack frame allocated when calling signal handler. */
92 #define __SIGNAL_FRAMESIZE 128
93 #define __SIGNAL_FRAMESIZE32 64
96 * Offsets used by 'ptrace' system call interface.
134 #define PT_ORIG_R3 34
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.
152 #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
155 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
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)
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)
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.
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.
180 #define PTRACE_GETVRREGS 18
181 #define PTRACE_SETVRREGS 19
184 * While we dont have 64bit book E processors, we need to reserve the
185 * relevant ptrace calls for 32bit compatibility.
188 #define PTRACE_GETEVRREGS 20
189 #define PTRACE_SETEVRREGS 21
193 * Get or set a debug register. The first 16 are DABR registers and the
194 * second 16 are IABR registers.
196 #define PTRACE_GET_DEBUGREG 25
197 #define PTRACE_SET_DEBUGREG 26
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 */
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
213 #endif /* _PPC64_PTRACE_H */