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9a8fd558 CZ |
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 | ||
11 | #ifndef _XTENSA_PTRACE_H | |
12 | #define _XTENSA_PTRACE_H | |
13 | ||
9a8fd558 CZ |
14 | /* |
15 | * Kernel stack | |
16 | * | |
17 | * +-----------------------+ -------- STACK_SIZE | |
18 | * | register file | | | |
19 | * +-----------------------+ | | |
20 | * | struct pt_regs | | | |
21 | * +-----------------------+ | ------ PT_REGS_OFFSET | |
22 | * double : 16 bytes spill area : | ^ | |
23 | * excetion :- - - - - - - - - - - -: | | | |
24 | * frame : struct pt_regs : | | | |
25 | * :- - - - - - - - - - - -: | | | |
26 | * | | | | | |
27 | * | memory stack | | | | |
28 | * | | | | | |
29 | * ~ ~ ~ ~ | |
30 | * ~ ~ ~ ~ | |
31 | * | | | | | |
32 | * | | | | | |
33 | * +-----------------------+ | | --- STACK_BIAS | |
34 | * | struct task_struct | | | ^ | |
35 | * current --> +-----------------------+ | | | | |
36 | * | struct thread_info | | | | | |
37 | * +-----------------------+ -------- | |
38 | */ | |
39 | ||
40 | #define KERNEL_STACK_SIZE (2 * PAGE_SIZE) | |
41 | ||
42 | /* Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */ | |
43 | ||
44 | #define EXC_TABLE_KSTK 0x004 /* Kernel Stack */ | |
45 | #define EXC_TABLE_DOUBLE_SAVE 0x008 /* Double exception save area for a0 */ | |
46 | #define EXC_TABLE_FIXUP 0x00c /* Fixup handler */ | |
47 | #define EXC_TABLE_PARAM 0x010 /* For passing a parameter to fixup */ | |
48 | #define EXC_TABLE_SYSCALL_SAVE 0x014 /* For fast syscall handler */ | |
49 | #define EXC_TABLE_FAST_USER 0x100 /* Fast user exception handler */ | |
50 | #define EXC_TABLE_FAST_KERNEL 0x200 /* Fast kernel exception handler */ | |
51 | #define EXC_TABLE_DEFAULT 0x300 /* Default C-Handler */ | |
52 | #define EXC_TABLE_SIZE 0x400 | |
53 | ||
54 | /* Registers used by strace */ | |
55 | ||
c658eac6 CZ |
56 | #define REG_A_BASE 0x0000 |
57 | #define REG_AR_BASE 0x0100 | |
58 | #define REG_PC 0x0020 | |
59 | #define REG_PS 0x02e6 | |
60 | #define REG_WB 0x0248 | |
61 | #define REG_WS 0x0249 | |
62 | #define REG_LBEG 0x0200 | |
63 | #define REG_LEND 0x0201 | |
64 | #define REG_LCOUNT 0x0202 | |
65 | #define REG_SAR 0x0203 | |
66 | ||
67 | #define SYSCALL_NR 0x00ff | |
9a8fd558 CZ |
68 | |
69 | /* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */ | |
70 | ||
c658eac6 CZ |
71 | #define PTRACE_GETREGS 12 |
72 | #define PTRACE_SETREGS 13 | |
73 | #define PTRACE_GETXTREGS 18 | |
74 | #define PTRACE_SETXTREGS 19 | |
9a8fd558 | 75 | |
c658eac6 CZ |
76 | #ifdef __KERNEL__ |
77 | ||
f22ab814 AB |
78 | #ifndef __ASSEMBLY__ |
79 | ||
9a8fd558 CZ |
80 | /* |
81 | * This struct defines the way the registers are stored on the | |
82 | * kernel stack during a system call or other kernel entry. | |
83 | */ | |
84 | struct pt_regs { | |
85 | unsigned long pc; /* 4 */ | |
86 | unsigned long ps; /* 8 */ | |
87 | unsigned long depc; /* 12 */ | |
88 | unsigned long exccause; /* 16 */ | |
89 | unsigned long excvaddr; /* 20 */ | |
90 | unsigned long debugcause; /* 24 */ | |
91 | unsigned long wmask; /* 28 */ | |
92 | unsigned long lbeg; /* 32 */ | |
93 | unsigned long lend; /* 36 */ | |
94 | unsigned long lcount; /* 40 */ | |
95 | unsigned long sar; /* 44 */ | |
96 | unsigned long windowbase; /* 48 */ | |
97 | unsigned long windowstart; /* 52 */ | |
98 | unsigned long syscall; /* 56 */ | |
29c4dfd9 CZ |
99 | unsigned long icountlevel; /* 60 */ |
100 | int reserved[1]; /* 64 */ | |
9a8fd558 | 101 | |
c658eac6 CZ |
102 | /* Additional configurable registers that are used by the compiler. */ |
103 | xtregs_opt_t xtregs_opt; | |
104 | ||
9a8fd558 CZ |
105 | /* Make sure the areg field is 16 bytes aligned. */ |
106 | int align[0] __attribute__ ((aligned(16))); | |
107 | ||
108 | /* current register frame. | |
109 | * Note: The ESF for kernel exceptions ends after 16 registers! | |
110 | */ | |
111 | unsigned long areg[16]; /* 128 (64) */ | |
112 | }; | |
113 | ||
de4f6e5b CZ |
114 | #include <asm/variant/core.h> |
115 | ||
04fe6faf AV |
116 | # define task_pt_regs(tsk) ((struct pt_regs*) \ |
117 | (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1) | |
9a8fd558 CZ |
118 | # define user_mode(regs) (((regs)->ps & 0x00000020)!=0) |
119 | # define instruction_pointer(regs) ((regs)->pc) | |
120 | extern void show_regs(struct pt_regs *); | |
121 | ||
122 | # ifndef CONFIG_SMP | |
123 | # define profile_pc(regs) instruction_pointer(regs) | |
124 | # endif | |
9a8fd558 CZ |
125 | |
126 | #else /* __ASSEMBLY__ */ | |
127 | ||
0013a854 | 128 | # include <asm/asm-offsets.h> |
9a8fd558 | 129 | #define PT_REGS_OFFSET (KERNEL_STACK_SIZE - PT_USER_SIZE) |
9a8fd558 CZ |
130 | |
131 | #endif /* !__ASSEMBLY__ */ | |
f22ab814 AB |
132 | |
133 | #endif /* __KERNEL__ */ | |
134 | ||
9a8fd558 | 135 | #endif /* _XTENSA_PTRACE_H */ |