2 * May be copied or modified under the terms of the GNU General Public
3 * License. See linux/COPYING for more information.
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>
9 * Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
10 * Henry Bell <henry.bell@st.com>
12 * Header file for low-level support for remote debug using GDB.
19 #include <asm/ptrace.h>
23 /* Same as pt_regs but has vbr in place of syscall_nr */
25 unsigned long regs[16];
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*/
44 extern int kgdb_portnum;
46 extern char kgdb_parity;
47 extern char kgdb_bits;
48 extern int kgdb_console_setup(struct console *, char *);
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);
59 int (*setup_fn)(struct console *, char *);
60 struct kgdb_sermap *next;
62 extern void kgdb_register_sermap(struct kgdb_sermap *map);
63 extern struct kgdb_sermap *kgdb_porttype;
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;
71 extern void breakpoint(void);
75 void kgdb_console_write(struct console *co, const char *s, unsigned count);
76 void kgdb_console_init(void);
78 /* Prototypes for jmp fns */
80 typedef int jmp_buf[_JBLEN];
81 extern void longjmp(jmp_buf __jmpb, int __retval);
82 extern int setjmp(jmp_buf __jmpb);
84 /* Variadic macro to print our own message to the console */
85 #define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__)
87 /* Forced breakpoint */
88 #define BREAKPOINT() \
91 __asm__ __volatile__("trapa #0x3c"); \
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) \
98 extern void __flush_purge_region(void *, int); \
99 __flush_purge_region((void*)(start), (int)(end) - (int)(start));\
100 flush_icache_range((start), (end)); \
103 #define kgdb_flush_icache_range(start, end) do { } while (0)
106 /* Kernel assert macros */
107 #ifdef CONFIG_KGDB_KERNEL_ASSERTS
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)
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);\
128 #define KGDB_ASSERT(condition, message)
131 /* Taken from sh-stub.c of GDB 4.18 */
132 static const char hexchars[] = "0123456789abcdef";
134 /* Get high hex bits */
135 static inline char highhex(const int x)
137 return hexchars[(x >> 4) & 0xf];
140 /* Get low hex bits */
141 static inline char lowhex(const int x)
143 return hexchars[x & 0xf];