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