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Linux kernel mirror (for testing)
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linux
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 */