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1da177e4 LT |
1 | /* |
2 | * May be copied or modified under the terms of the GNU General Public | |
3 | * License. See linux/COPYING for more information. | |
4 | * | |
5 | * Based on original code by Glenn Engel, Jim Kingdon, | |
6 | * David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and | |
7 | * Amit S. Kale <akale@veritas.com> | |
8 | * | |
9 | * Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by | |
10 | * Henry Bell <henry.bell@st.com> | |
11 | * | |
12 | * Header file for low-level support for remote debug using GDB. | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef __KGDB_H | |
17 | #define __KGDB_H | |
18 | ||
19 | #include <asm/ptrace.h> | |
20 | ||
21 | struct console; | |
22 | ||
23 | /* Same as pt_regs but has vbr in place of syscall_nr */ | |
24 | struct kgdb_regs { | |
25 | unsigned long regs[16]; | |
26 | unsigned long pc; | |
27 | unsigned long pr; | |
28 | unsigned long sr; | |
29 | unsigned long gbr; | |
30 | unsigned long mach; | |
31 | unsigned long macl; | |
32 | unsigned long vbr; | |
33 | }; | |
34 | ||
35 | /* State info */ | |
36 | extern char kgdb_in_gdb_mode; | |
37 | extern int kgdb_done_init; | |
38 | extern int kgdb_enabled; | |
39 | extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */ | |
40 | extern int kgdb_halt; /* Execute initial breakpoint at startup */ | |
41 | extern char in_nmi; /* Debounce flag to prevent NMI reentry*/ | |
42 | ||
43 | /* SCI */ | |
44 | extern int kgdb_portnum; | |
45 | extern int kgdb_baud; | |
46 | extern char kgdb_parity; | |
47 | extern char kgdb_bits; | |
48 | extern int kgdb_console_setup(struct console *, char *); | |
49 | ||
50 | /* Init and interface stuff */ | |
51 | extern int kgdb_init(void); | |
52 | extern int (*kgdb_serial_setup)(void); | |
53 | extern int (*kgdb_getchar)(void); | |
54 | extern void (*kgdb_putchar)(int); | |
55 | ||
56 | struct kgdb_sermap { | |
57 | char *name; | |
58 | int namelen; | |
59 | int (*setup_fn)(struct console *, char *); | |
60 | struct kgdb_sermap *next; | |
61 | }; | |
62 | extern void kgdb_register_sermap(struct kgdb_sermap *map); | |
63 | extern struct kgdb_sermap *kgdb_porttype; | |
64 | ||
65 | /* Trap functions */ | |
66 | typedef void (kgdb_debug_hook_t)(struct pt_regs *regs); | |
67 | typedef void (kgdb_bus_error_hook_t)(void); | |
68 | extern kgdb_debug_hook_t *kgdb_debug_hook; | |
69 | extern kgdb_bus_error_hook_t *kgdb_bus_err_hook; | |
70 | ||
71 | extern void breakpoint(void); | |
72 | ||
73 | /* Console */ | |
74 | struct console; | |
75 | void kgdb_console_write(struct console *co, const char *s, unsigned count); | |
76 | void kgdb_console_init(void); | |
77 | ||
78 | /* Prototypes for jmp fns */ | |
79 | #define _JBLEN 9 | |
80 | typedef int jmp_buf[_JBLEN]; | |
81 | extern void longjmp(jmp_buf __jmpb, int __retval); | |
82 | extern int setjmp(jmp_buf __jmpb); | |
83 | ||
84 | /* Variadic macro to print our own message to the console */ | |
85 | #define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__) | |
86 | ||
87 | /* Forced breakpoint */ | |
88 | #define BREAKPOINT() do { \ | |
89 | if (kgdb_enabled) { \ | |
90 | asm volatile("trapa #0xff"); \ | |
91 | } \ | |
92 | } while (0) | |
93 | ||
94 | /* KGDB should be able to flush all kernel text space */ | |
95 | #if defined(CONFIG_CPU_SH4) | |
96 | #define kgdb_flush_icache_range(start, end) \ | |
97 | { \ | |
98 | extern void __flush_purge_region(void *, int); \ | |
99 | __flush_purge_region((void*)(start), (int)(end) - (int)(start));\ | |
100 | flush_icache_range((start), (end)); \ | |
101 | } | |
102 | #else | |
103 | #define kgdb_flush_icache_range(start, end) do { } while (0) | |
104 | #endif | |
105 | ||
106 | /* Kernel assert macros */ | |
107 | #ifdef CONFIG_KGDB_KERNEL_ASSERTS | |
108 | ||
109 | /* Predefined conditions */ | |
110 | #define KA_VALID_ERRNO(errno) ((errno) > 0 && (errno) <= EMEDIUMTYPE) | |
111 | #define KA_VALID_PTR_ERR(ptr) KA_VALID_ERRNO(-PTR_ERR(ptr)) | |
112 | #define KA_VALID_KPTR(ptr) (!(ptr) || \ | |
113 | ((void *)(ptr) >= (void *)PAGE_OFFSET && \ | |
114 | (void *)(ptr) < ERR_PTR(-EMEDIUMTYPE))) | |
115 | #define KA_VALID_PTRORERR(errptr) \ | |
116 | (KA_VALID_KPTR(errptr) || KA_VALID_PTR_ERR(errptr)) | |
117 | #define KA_HELD_GKL() (current->lock_depth >= 0) | |
118 | ||
119 | /* The actual assert */ | |
120 | #define KGDB_ASSERT(condition, message) do { \ | |
121 | if (!(condition) && (kgdb_enabled)) { \ | |
122 | KGDB_PRINTK("Assertion failed at %s:%d: %s\n", \ | |
123 | __FILE__, __LINE__, message);\ | |
124 | BREAKPOINT(); \ | |
125 | } \ | |
126 | } while (0) | |
127 | #else | |
128 | #define KGDB_ASSERT(condition, message) | |
129 | #endif | |
130 | ||
131 | #endif |