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.
28 #define PPC_REG unsigned long
33 PPC_REG orig_gpr3; /* Used for restarting system calls */
38 PPC_REG softe; /* Soft enabled/disabled */
39 PPC_REG trap; /* Reason for being here */
40 PPC_REG dar; /* Fault registers */
42 PPC_REG result; /* Result of a system call */
45 #define PPC_REG_32 unsigned int
50 PPC_REG_32 orig_gpr3; /* Used for restarting system calls */
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 */
60 PPC_REG_32 result; /* Result of a system call */
65 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
67 /* Size of dummy stack frame allocated when calling signal handler. */
68 #define __SIGNAL_FRAMESIZE 128
69 #define __SIGNAL_FRAMESIZE32 64
71 #define instruction_pointer(regs) ((regs)->nip)
72 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
75 * Offsets used by 'ptrace' system call interface.
113 #define PT_ORIG_R3 34
124 /* Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will have
125 * visibility to the asm-ppc/ptrace.h header instead of this one.
127 #define PT_FPSCR (PT_FPR0 + 32 + 1) /* each FP reg occupies 1 slot in 64-bit space */
130 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
133 #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
134 #define PT_VSCR (PT_VR0 + 32*2 + 1)
135 #define PT_VRSAVE (PT_VR0 + 33*2)
138 #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
139 #define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
140 #define PT_VRSAVE_32 (PT_VR0 + 33*4)
144 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
145 * The transfer totals 34 quadword. Quadwords 0-31 contain the
146 * corresponding vector registers. Quadword 32 contains the vscr as the
147 * last word (offset 12) within that quadword. Quadword 33 contains the
148 * vrsave as the first word (offset 0) within the quadword.
150 * This definition of the VMX state is compatible with the current PPC32
151 * ptrace interface. This allows signal handling and ptrace to use the same
152 * structures. This also simplifies the implementation of a bi-arch
153 * (combined (32- and 64-bit) gdb.
155 #define PTRACE_GETVRREGS 18
156 #define PTRACE_SETVRREGS 19
158 /* Additional PTRACE requests implemented on PowerPC. */
159 #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
160 #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
161 #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
162 #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
163 #define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
164 #define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
165 #define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
166 #define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
167 #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. */
168 #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. */
171 #endif /* _PPC64_PTRACE_H */