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/ppc/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.
27 #define INIT_TASK_SIZE 4*PAGE_SIZE
30 #define PPC_REG unsigned long
35 PPC_REG orig_gpr3; /* Used for restarting system calls */
40 PPC_REG softe; /* Soft enabled/disabled */
41 PPC_REG trap; /* Reason for being here */
42 PPC_REG dar; /* Fault registers */
44 PPC_REG result; /* Result of a system call */
47 #define PPC_REG_32 unsigned int
52 PPC_REG_32 orig_gpr3; /* Used for restarting system calls */
57 PPC_REG_32 mq; /* 601 only (not used at present) */
58 /* Used on APUS to hold IPL value. */
59 PPC_REG_32 trap; /* Reason for being here */
60 PPC_REG_32 dar; /* Fault registers */
62 PPC_REG_32 result; /* Result of a system call */
67 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
69 /* Size of dummy stack frame allocated when calling signal handler. */
70 #define __SIGNAL_FRAMESIZE 128
71 #define __SIGNAL_FRAMESIZE32 64
73 #define instruction_pointer(regs) ((regs)->nip)
74 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
77 * Offsets used by 'ptrace' system call interface.
115 #define PT_ORIG_R3 34
126 #define PT_FPSCR (PT_FPR0 + 32 + 1) /* each FP reg occupies 1 slot in this space */
127 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* To the 32-bit user - each FP reg occupies 2 slots in this space */
129 #define PT_FPSCR (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 slots in this space -- Fix when 64-bit apps. */
132 /* Additional PTRACE requests implemented on PowerPC. */
133 #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
134 #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
135 #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
136 #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
137 #define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
138 #define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
139 #define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
140 #define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
141 #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. */
142 #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. */
145 #endif /* _PPC64_PTRACE_H */