#ifndef _PPC_PTRACE_H #define _PPC_PTRACE_H /* * This struct defines the way the registers are stored on the * kernel stack during a system call or other kernel entry. * * this should only contain volatile regs * since we can keep non-volatile in the thread_struct * should set this up when only volatiles are saved * by intr code. * * Since this is going on the stack, *CARE MUST BE TAKEN* to insure * that the overall structure is a multiple of 16 bytes in length. * * Note that the offsets of the fields in this struct correspond with * the PT_* values below. This simplifies arch/ppc/kernel/ptrace.c. */ #include <linux/config.h> #ifndef __ASSEMBLY__ #ifdef CONFIG_PPC64BRIDGE #define PPC_REG unsigned long /*long*/ #else #define PPC_REG unsigned long #endif struct pt_regs { PPC_REG gpr[32]; PPC_REG nip; PPC_REG msr; PPC_REG orig_gpr3; /* Used for restarting system calls */ PPC_REG ctr; PPC_REG link; PPC_REG xer; PPC_REG ccr; PPC_REG mq; /* 601 only (not used at present) */ /* Used on APUS to hold IPL value. */ PPC_REG trap; /* Reason for being here */ PPC_REG dar; /* Fault registers */ PPC_REG dsisr; PPC_REG result; /* Result of a system call */ }; #endif #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ /* Size of stack frame allocated when calling signal handler. */ #define __SIGNAL_FRAMESIZE 64 #define instruction_pointer(regs) ((regs)->nip) #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) /* * Offsets used by 'ptrace' system call interface. * These can't be changed without breaking binary compatibility * with MkLinux, etc. */ #define PT_R0 0 #define PT_R1 1 #define PT_R2 2 #define PT_R3 3 #define PT_R4 4 #define PT_R5 5 #define PT_R6 6 #define PT_R7 7 #define PT_R8 8 #define PT_R9 9 #define PT_R10 10 #define PT_R11 11 #define PT_R12 12 #define PT_R13 13 #define PT_R14 14 #define PT_R15 15 #define PT_R16 16 #define PT_R17 17 #define PT_R18 18 #define PT_R19 19 #define PT_R20 20 #define PT_R21 21 #define PT_R22 22 #define PT_R23 23 #define PT_R24 24 #define PT_R25 25 #define PT_R26 26 #define PT_R27 27 #define PT_R28 28 #define PT_R29 29 #define PT_R30 30 #define PT_R31 31 #define PT_NIP 32 #define PT_MSR 33 #ifdef __KERNEL__ #define PT_ORIG_R3 34 #endif #define PT_CTR 35 #define PT_LNK 36 #define PT_XER 37 #define PT_CCR 38 #define PT_MQ 39 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ #define PT_FPR31 (PT_FPR0 + 2*31) #define PT_FPSCR (PT_FPR0 + 2*32 + 1) #endif