- /*
- * BK Id: SCCS/s.ptrace.h 1.5 05/17/01 18:14:25 cort
- */
- #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.
- */
- #ifndef __ASSEMBLY__
- struct pt_regs {
- unsigned long gpr[32];
- unsigned long nip;
- unsigned long msr;
- unsigned long orig_gpr3; /* Used for restarting system calls */
- unsigned long ctr;
- unsigned long link;
- unsigned long xer;
- unsigned long ccr;
- unsigned long mq; /* 601 only (not used at present) */
- /* Used on APUS to hold IPL value. */
- unsigned long trap; /* Reason for being here */
- unsigned long dar; /* Fault registers */
- unsigned long dsisr;
- unsigned long result; /* Result of a system call */
- };
- #endif
- #ifdef __KERNEL__
- #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)
- #endif /* __KERNEL__ */
- /*
- * 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