1 #ifndef _PPC_PTRACE_H 2 #define _PPC_PTRACE_H 3 4 /* 5 * This struct defines the way the registers are stored on the 6 * kernel stack during a system call or other kernel entry. 7 * 8 * this should only contain volatile regs 9 * since we can keep non-volatile in the thread_struct 10 * should set this up when only volatiles are saved 11 * by intr code. 12 * 13 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure 14 * that the overall structure is a multiple of 16 bytes in length. 15 * 16 * Note that the offsets of the fields in this struct correspond with 17 * the PT_* values below. This simplifies arch/ppc/kernel/ptrace.c. 18 */ 19 20 #ifndef __ASSEMBLY__ 21 struct pt_regs { 22 unsigned long gpr[32]; 23 unsigned long nip; 24 unsigned long msr; 25 unsigned long orig_gpr3; /* Used for restarting system calls */ 26 unsigned long ctr; 27 unsigned long link; 28 unsigned long xer; 29 unsigned long ccr; 30 unsigned long mq; /* 601 only (not used at present) */ 31 /* Used on APUS to hold IPL value. */ 32 unsigned long trap; /* Reason for being here */ 33 unsigned long dar; /* Fault registers */ 34 unsigned long dsisr; /* used for ESR on 4xx/Book-E */ 35 unsigned long result; /* Result of a system call */ 36 }; 37 #endif 38 39 #ifdef __KERNEL__ 40 #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ 41 42 /* Size of stack frame allocated when calling signal handler. */ 43 #define __SIGNAL_FRAMESIZE 64 44 45 #define instruction_pointer(regs) ((regs)->nip) 46 #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) 47 48 #endif /* __KERNEL__ */ 49 50 /* 51 * Offsets used by 'ptrace' system call interface. 52 * These can't be changed without breaking binary compatibility 53 * with MkLinux, etc. 54 */ 55 #define PT_R0 0 56 #define PT_R1 1 57 #define PT_R2 2 58 #define PT_R3 3 59 #define PT_R4 4 60 #define PT_R5 5 61 #define PT_R6 6 62 #define PT_R7 7 63 #define PT_R8 8 64 #define PT_R9 9 65 #define PT_R10 10 66 #define PT_R11 11 67 #define PT_R12 12 68 #define PT_R13 13 69 #define PT_R14 14 70 #define PT_R15 15 71 #define PT_R16 16 72 #define PT_R17 17 73 #define PT_R18 18 74 #define PT_R19 19 75 #define PT_R20 20 76 #define PT_R21 21 77 #define PT_R22 22 78 #define PT_R23 23 79 #define PT_R24 24 80 #define PT_R25 25 81 #define PT_R26 26 82 #define PT_R27 27 83 #define PT_R28 28 84 #define PT_R29 29 85 #define PT_R30 30 86 #define PT_R31 31 87 88 #define PT_NIP 32 89 #define PT_MSR 33 90 #ifdef __KERNEL__ 91 #define PT_ORIG_R3 34 92 #endif 93 #define PT_CTR 35 94 #define PT_LNK 36 95 #define PT_XER 37 96 #define PT_CCR 38 97 #define PT_MQ 39 98 99 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ 100 #define PT_FPR31 (PT_FPR0 + 2*31) 101 #define PT_FPSCR (PT_FPR0 + 2*32 + 1) 102 103 /* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go */ 104 #define PTRACE_GETVRREGS 18 105 #define PTRACE_SETVRREGS 19 106 107 #endif 108