1 files changed, 107 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h
new file mode 100644
index 0000000000..cf09edf156
--- /dev/null
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -0,0 +1,107 @@
+#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/powerpc/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