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 #define PPC_REG unsigned long 22 23 struct pt_regs { 24 PPC_REG gpr[32]; 25 PPC_REG nip; 26 PPC_REG msr; 27 PPC_REG orig_gpr3; /* Used for restarting system calls */ 28 PPC_REG ctr; 29 PPC_REG link; 30 PPC_REG xer; 31 PPC_REG ccr; 32 PPC_REG mq; /* 601 only (not used at present) */ 33 /* Used on APUS to hold IPL value. */ 34 PPC_REG trap; /* Reason for being here */ 35 PPC_REG dar; /* Fault registers */ 36 PPC_REG dsisr; 37 PPC_REG result; /* Result of a system call */ 38 }__attribute__((packed)) CELL_STACK_FRAME_t; 39 #endif 40 41 #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ 42 43 /* Size of stack frame allocated when calling signal handler. */ 44 #define __SIGNAL_FRAMESIZE 64 45 46 #define instruction_pointer(regs) ((regs)->nip) 47 #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) 48 49 /* 50 * Offsets used by 'ptrace' system call interface. 51 * These can't be changed without breaking binary compatibility 52 * with MkLinux, etc. 53 */ 54 #define PT_R0 0 55 #define PT_R1 1 56 #define PT_R2 2 57 #define PT_R3 3 58 #define PT_R4 4 59 #define PT_R5 5 60 #define PT_R6 6 61 #define PT_R7 7 62 #define PT_R8 8 63 #define PT_R9 9 64 #define PT_R10 10 65 #define PT_R11 11 66 #define PT_R12 12 67 #define PT_R13 13 68 #define PT_R14 14 69 #define PT_R15 15 70 #define PT_R16 16 71 #define PT_R17 17 72 #define PT_R18 18 73 #define PT_R19 19 74 #define PT_R20 20 75 #define PT_R21 21 76 #define PT_R22 22 77 #define PT_R23 23 78 #define PT_R24 24 79 #define PT_R25 25 80 #define PT_R26 26 81 #define PT_R27 27 82 #define PT_R28 28 83 #define PT_R29 29 84 #define PT_R30 30 85 #define PT_R31 31 86 87 #define PT_NIP 32 88 #define PT_MSR 33 89 #define PT_ORIG_R3 34 90 #define PT_CTR 35 91 #define PT_LNK 36 92 #define PT_XER 37 93 #define PT_CCR 38 94 #define PT_MQ 39 95 96 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ 97 #define PT_FPR31 (PT_FPR0 + 2*31) 98 #define PT_FPSCR (PT_FPR0 + 2*32 + 1) 99 100 #endif 101