sh: First support code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/include/asm-sh/ptrace.h b/include/asm-sh/ptrace.h
new file mode 100644
index 0000000..14cc1ac
--- /dev/null
+++ b/include/asm-sh/ptrace.h
@@ -0,0 +1,112 @@
+#ifndef __ASM_SH_PTRACE_H
+#define __ASM_SH_PTRACE_H
+
+/*
+ * Copyright (C) 1999, 2000  Niibe Yutaka
+ * from linux kernel code.
+ */
+
+/*
+ * GCC defines register number like this:
+ * -----------------------------
+ *	 0 - 15 are integer registers
+ *	17 - 22 are control/special registers
+ *	24 - 39 fp registers
+ *	40 - 47 xd registers
+ *	48 -    fpscr register
+ * -----------------------------
+ *
+ * We follows above, except:
+ *	16 --- program counter (PC)
+ *	22 --- syscall #
+ *	23 --- floating point communication register
+ */
+#define REG_REG0	 0
+#define REG_REG15	15
+
+#define REG_PC		16
+
+#define REG_PR		17
+#define REG_SR		18
+#define REG_GBR      	19
+#define REG_MACH	20
+#define REG_MACL	21
+
+#define REG_SYSCALL	22
+
+#define REG_FPREG0	23
+#define REG_FPREG15	38
+#define REG_XFREG0	39
+#define REG_XFREG15	54
+
+#define REG_FPSCR	55
+#define REG_FPUL	56
+
+/* options set using PTRACE_SETOPTIONS */
+#define PTRACE_O_TRACESYSGOOD     0x00000001
+
+/*
+ * This struct defines the way the registers are stored on the
+ * kernel stack during a system call or other kernel entry.
+ */
+struct pt_regs {
+	unsigned long regs[16];
+	unsigned long pc;
+	unsigned long pr;
+	unsigned long sr;
+	unsigned long gbr;
+	unsigned long mach;
+	unsigned long macl;
+	long tra;
+};
+
+/*
+ * This struct defines the way the DSP registers are stored on the
+ * kernel stack during a system call or other kernel entry.
+ */
+struct pt_dspregs {
+	unsigned long	a1;
+	unsigned long	a0g;
+	unsigned long	a1g;
+	unsigned long	m0;
+	unsigned long	m1;
+	unsigned long	a0;
+	unsigned long	x0;
+	unsigned long	x1;
+	unsigned long	y0;
+	unsigned long	y1;
+	unsigned long	dsr;
+	unsigned long	rs;
+	unsigned long	re;
+	unsigned long	mod;
+};
+
+#define	PTRACE_GETDSPREGS	55
+#define	PTRACE_SETDSPREGS	56
+
+#ifdef __KERNEL__
+#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
+#define instruction_pointer(regs) ((regs)->pc)
+extern void show_regs(struct pt_regs *);
+
+#ifdef CONFIG_SH_DSP
+#define task_pt_regs(task) \
+	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
+		 - sizeof(struct pt_dspregs) - sizeof(unsigned long)) - 1)
+#else
+#define task_pt_regs(task) \
+	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
+		 - sizeof(unsigned long)) - 1)
+#endif
+
+static inline unsigned long profile_pc(struct pt_regs *regs)
+{
+	unsigned long pc = instruction_pointer(regs);
+
+	if (pc >= 0xa0000000UL && pc < 0xc0000000UL)
+		pc -= 0x20000000;
+	return pc;
+}
+#endif
+
+#endif /* __ASM_SH_PTRACE_H */