include/asm-ppc/ptrace.h

Name: Public Git Hosting - davej-history.git/blob - include/asm-ppc/ptrace.h
Rating: 4.6 (2237 reviews)
 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 #include <linux/config.h>
 21
 22 #ifndef __ASSEMBLY__
 23 #ifdef CONFIG_PPC64
 24 #define PPC_REG unsigned long/*long*/
 25 #else
 26 #define PPC_REG unsigned long
 27 #endif
 28 struct pt_regs {
 29  PPC_REG gpr[32];
 30  PPC_REG nip;
 31  PPC_REG msr;
 32  PPC_REG orig_gpr3;/* Used for restarting system calls */
 33  PPC_REG ctr;
 34  PPC_REG link;
 35  PPC_REG xer;
 36  PPC_REG ccr;
 37  PPC_REG mq;/* 601 only (not used at present) */
 38 /* Used on APUS to hold IPL value. */
 39  PPC_REG trap;/* Reason for being here */
 40  PPC_REG dar;/* Fault registers */
 41  PPC_REG dsisr;
 42  PPC_REG result;/* Result of a system call */
 43 };
 44 #endif
 45
 46 #define STACK_FRAME_OVERHEAD 16/* size of minimum stack frame */
 47
 48 /* Size of stack frame allocated when calling signal handler. */
 49 #define __SIGNAL_FRAMESIZE 64
 50
 51 #define instruction_pointer(regs) ((regs)->nip)
 52 #define user_mode(regs) ((regs)->msr & 0x4000)
 53
 54 /*
 55  * Offsets used by 'ptrace' system call interface.
 56  * These can't be changed without breaking binary compatibility
 57  * with MkLinux, etc.
 58  */
 59 #define PT_R0 0
 60 #define PT_R1 1
 61 #define PT_R2 2
 62 #define PT_R3 3
 63 #define PT_R4 4
 64 #define PT_R5 5
 65 #define PT_R6 6
 66 #define PT_R7 7
 67 #define PT_R8 8
 68 #define PT_R9 9
 69 #define PT_R10 10
 70 #define PT_R11 11
 71 #define PT_R12 12
 72 #define PT_R13 13
 73 #define PT_R14 14
 74 #define PT_R15 15
 75 #define PT_R16 16
 76 #define PT_R17 17
 77 #define PT_R18 18
 78 #define PT_R19 19
 79 #define PT_R20 20
 80 #define PT_R21 21
 81 #define PT_R22 22
 82 #define PT_R23 23
 83 #define PT_R24 24
 84 #define PT_R25 25
 85 #define PT_R26 26
 86 #define PT_R27 27
 87 #define PT_R28 28
 88 #define PT_R29 29
 89 #define PT_R30 30
 90 #define PT_R31 31
 91
 92 #define PT_NIP 32
 93 #define PT_MSR 33
 94 #ifdef __KERNEL__
 95 #define PT_ORIG_R3 34
 96 #endif
 97 #define PT_CTR 35
 98 #define PT_LNK 36
 99 #define PT_XER 37
 100 #define PT_CCR 38
 101 #define PT_MQ 39
 102
 103 #define PT_FPR0 48/* each FP reg occupies 2 slots in this space */
 104 #define PT_FPR31 (PT_FPR0 + 2*31)
 105 #define PT_FPSCR (PT_FPR0 + 2*32 + 1)
 106
 107 #endif
 108