1 files changed, 117 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
new file mode 100644
index 000000000..b109416dc
--- /dev/null
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -0,0 +1,117 @@
+/*
+ * include/asm-xtensa/ptrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+#ifndef _XTENSA_PTRACE_H
+#define _XTENSA_PTRACE_H
+
+#include <asm/kmem_layout.h>
+#include <uapi/asm/ptrace.h>
+
+/*
+ * Kernel stack
+ *
+ *		+-----------------------+  -------- STACK_SIZE
+ *		|     register file     |  |
+ *		+-----------------------+  |
+ *		|    struct pt_regs     |  |
+ *		+-----------------------+  | ------ PT_REGS_OFFSET
+ * double	:  16 bytes spill area  :  |  ^
+ * excetion	:- - - - - - - - - - - -:  |  |
+ * frame	:    struct pt_regs     :  |  |
+ *		:- - - - - - - - - - - -:  |  |
+ *		|                       |  |  |
+ *		|     memory stack      |  |  |
+ *		|                       |  |  |
+ *		~                       ~  ~  ~
+ *		~                       ~  ~  ~
+ *		|                       |  |  |
+ *		|                       |  |  |
+ *		+-----------------------+  |  | --- STACK_BIAS
+ *		|  struct task_struct   |  |  |  ^
+ *  current --> +-----------------------+  |  |  |
+ *		|  struct thread_info   |  |  |  |
+ *		+-----------------------+ --------
+ */
+
+#define NO_SYSCALL (-1)
+
+#ifndef __ASSEMBLY__
+
+#include <asm/coprocessor.h>
+
+/*
+ * 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 pc;		/*   4 */
+	unsigned long ps;		/*   8 */
+	unsigned long depc;		/*  12 */
+	unsigned long exccause;		/*  16 */
+	unsigned long excvaddr;		/*  20 */
+	unsigned long debugcause;	/*  24 */
+	unsigned long wmask;		/*  28 */
+	unsigned long lbeg;		/*  32 */
+	unsigned long lend;		/*  36 */
+	unsigned long lcount;		/*  40 */
+	unsigned long sar;		/*  44 */
+	unsigned long windowbase;	/*  48 */
+	unsigned long windowstart;	/*  52 */
+	unsigned long syscall;		/*  56 */
+	unsigned long icountlevel;	/*  60 */
+	unsigned long scompare1;	/*  64 */
+	unsigned long threadptr;	/*  68 */
+
+	/* Additional configurable registers that are used by the compiler. */
+	xtregs_opt_t xtregs_opt;
+
+	/* Make sure the areg field is 16 bytes aligned. */
+	int align[0] __attribute__ ((aligned(16)));
+
+	/* current register frame.
+	 * Note: The ESF for kernel exceptions ends after 16 registers!
+	 */
+	unsigned long areg[16];
+};
+
+#include <asm/core.h>
+
+# define arch_has_single_step()	(1)
+# define task_pt_regs(tsk) ((struct pt_regs*) \
+	(task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
+# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
+# define instruction_pointer(regs) ((regs)->pc)
+# define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
+					       (regs)->areg[1]))
+
+# ifndef CONFIG_SMP
+#  define profile_pc(regs) instruction_pointer(regs)
+# else
+#  define profile_pc(regs)						\
+	({								\
+		in_lock_functions(instruction_pointer(regs)) ?		\
+		return_pointer(regs) : instruction_pointer(regs);	\
+	})
+# endif
+
+#define user_stack_pointer(regs) ((regs)->areg[1])
+
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+	return regs->areg[2];
+}
+
+#else	/* __ASSEMBLY__ */
+
+# include <asm/asm-offsets.h>
+#define PT_REGS_OFFSET	  (KERNEL_STACK_SIZE - PT_USER_SIZE)
+
+#endif	/* !__ASSEMBLY__ */
+
+#endif	/* _XTENSA_PTRACE_H */