1/*
2 * include/asm-xtensa/ptrace.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
10#ifndef _XTENSA_PTRACE_H
11#define _XTENSA_PTRACE_H
12
13#include <uapi/asm/ptrace.h>
14
15
16#ifndef __ASSEMBLY__
17
18#include <asm/coprocessor.h>
19
20/*
21 * This struct defines the way the registers are stored on the
22 * kernel stack during a system call or other kernel entry.
23 */
24struct pt_regs {
25	unsigned long pc;		/*   4 */
26	unsigned long ps;		/*   8 */
27	unsigned long depc;		/*  12 */
28	unsigned long exccause;		/*  16 */
29	unsigned long excvaddr;		/*  20 */
30	unsigned long debugcause;	/*  24 */
31	unsigned long wmask;		/*  28 */
32	unsigned long lbeg;		/*  32 */
33	unsigned long lend;		/*  36 */
34	unsigned long lcount;		/*  40 */
35	unsigned long sar;		/*  44 */
36	unsigned long windowbase;	/*  48 */
37	unsigned long windowstart;	/*  52 */
38	unsigned long syscall;		/*  56 */
39	unsigned long icountlevel;	/*  60 */
40	unsigned long scompare1;	/*  64 */
41	unsigned long threadptr;	/*  68 */
42
43	/* Additional configurable registers that are used by the compiler. */
44	xtregs_opt_t xtregs_opt;
45
46	/* Make sure the areg field is 16 bytes aligned. */
47	int align[0] __attribute__ ((aligned(16)));
48
49	/* current register frame.
50	 * Note: The ESF for kernel exceptions ends after 16 registers!
51	 */
52	unsigned long areg[16];
53};
54
55#include <variant/core.h>
56
57# define arch_has_single_step()	(1)
58# define task_pt_regs(tsk) ((struct pt_regs*) \
59	(task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
60# define user_mode(regs) (((regs)->ps & 0x00000020)!=0)
61# define instruction_pointer(regs) ((regs)->pc)
62# define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \
63					       (regs)->areg[1]))
64
65# ifndef CONFIG_SMP
66#  define profile_pc(regs) instruction_pointer(regs)
67# else
68#  define profile_pc(regs)						\
69	({								\
70		in_lock_functions(instruction_pointer(regs)) ?		\
71		return_pointer(regs) : instruction_pointer(regs);	\
72	})
73# endif
74
75#define user_stack_pointer(regs) ((regs)->areg[1])
76
77#else	/* __ASSEMBLY__ */
78
79# include <asm/asm-offsets.h>
80#define PT_REGS_OFFSET	  (KERNEL_STACK_SIZE - PT_USER_SIZE)
81
82#endif	/* !__ASSEMBLY__ */
83
84#endif	/* _XTENSA_PTRACE_H */
85