1 #ifndef _PPC64_PTRACE_H 2 #define _PPC64_PTRACE_H 3 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 19 * the PT_* values below. This simplifies arch/ppc64/kernel/ptrace.c. 20 * 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 #define INIT_TASK_SIZE 4*PAGE_SIZE 28 29 #ifndef __ASSEMBLY__ 30 #define PPC_REG unsigned long 31 struct pt_regs { 32 PPC_REG gpr[32]; 33 PPC_REG nip; 34 PPC_REG msr; 35 PPC_REG orig_gpr3; /* Used for restarting system calls */ 36 PPC_REG ctr; 37 PPC_REG link; 38 PPC_REG xer; 39 PPC_REG ccr; 40 PPC_REG softe; /* Soft enabled/disabled */ 41 PPC_REG trap; /* Reason for being here */ 42 PPC_REG dar; /* Fault registers */ 43 PPC_REG dsisr; 44 PPC_REG result; /* Result of a system call */ 45 }; 46 47 #define PPC_REG_32 unsigned int 48 struct pt_regs32 { 49 PPC_REG_32 gpr[32]; 50 PPC_REG_32 nip; 51 PPC_REG_32 msr; 52 PPC_REG_32 orig_gpr3; /* Used for restarting system calls */ 53 PPC_REG_32 ctr; 54 PPC_REG_32 link; 55 PPC_REG_32 xer; 56 PPC_REG_32 ccr; 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 */ 61 PPC_REG_32 dsisr; 62 PPC_REG_32 result; /* Result of a system call */ 63 }; 64 65 #endif 66 67 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ 68 69 /* 70 * Size of dummy stack frame allocated when calling signal handler. 71 * These *MUST* be multiples of 16 since the ABI requires stack frames 72 * be quadword aligned. 73 */ 74 #define __SIGNAL_FRAMESIZE 128 75 #define __SIGNAL_FRAMESIZE32 64 76 77 #define instruction_pointer(regs) ((regs)->nip) 78 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) 79 80 /* 81 * Offsets used by 'ptrace' system call interface. 82 */ 83 #define PT_R0 0 84 #define PT_R1 1 85 #define PT_R2 2 86 #define PT_R3 3 87 #define PT_R4 4 88 #define PT_R5 5 89 #define PT_R6 6 90 #define PT_R7 7 91 #define PT_R8 8 92 #define PT_R9 9 93 #define PT_R10 10 94 #define PT_R11 11 95 #define PT_R12 12 96 #define PT_R13 13 97 #define PT_R14 14 98 #define PT_R15 15 99 #define PT_R16 16 100 #define PT_R17 17 101 #define PT_R18 18 102 #define PT_R19 19 103 #define PT_R20 20 104 #define PT_R21 21 105 #define PT_R22 22 106 #define PT_R23 23 107 #define PT_R24 24 108 #define PT_R25 25 109 #define PT_R26 26 110 #define PT_R27 27 111 #define PT_R28 28 112 #define PT_R29 29 113 #define PT_R30 30 114 #define PT_R31 31 115 116 #define PT_NIP 32 117 #define PT_MSR 33 118 #ifdef __KERNEL__ 119 #define PT_ORIG_R3 34 120 #endif 121 #define PT_CTR 35 122 #define PT_LNK 36 123 #define PT_XER 37 124 #define PT_CCR 38 125 #define PT_SOFTE 39 126 #define PT_RESULT 43 127 128 #define PT_FPR0 48 129 130 /* Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will have 131 * visibility to the asm-ppc/ptrace.h header instead of this one. 132 */ 133 #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ 134 135 #ifdef __KERNEL__ 136 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ 137 #endif 138 139 /* Additional PTRACE requests implemented on PowerPC. */ 140 #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ 141 #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ 142 #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ 143 #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ 144 #define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ 145 #define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ 146 #define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ 147 #define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ 148 #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. */ 149 #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. */ 150 151 /* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go */ 152 #define PTRACE_GETVRREGS 18 153 #define PTRACE_SETVRREGS 19 154 155 #endif /* _PPC64_PTRACE_H */ 156