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* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
* Based on original code by Glenn Engel, Jim Kingdon,
* David Grothe <>, Tigran Aivazian, <> and
* Amit S. Kale <>
* Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
* Henry Bell <>
* Header file for low-level support for remote debug using GDB.
#ifndef __KGDB_H
#define __KGDB_H
#include <asm/ptrace.h>
/* Same as pt_regs but has vbr in place of syscall_nr */
struct kgdb_regs {
unsigned long regs[16];
unsigned long pc;
unsigned long pr;
unsigned long sr;
unsigned long gbr;
unsigned long mach;
unsigned long macl;
unsigned long vbr;
/* State info */
extern char kgdb_in_gdb_mode;
extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
/* SCI */
extern int kgdb_portnum;
extern int kgdb_baud;
extern char kgdb_parity;
extern char kgdb_bits;
/* Init and interface stuff */
extern int kgdb_init(void);
extern int (*kgdb_getchar)(void);
extern void (*kgdb_putchar)(int);
/* Trap functions */
typedef void (kgdb_debug_hook_t)(struct pt_regs *regs);
typedef void (kgdb_bus_error_hook_t)(void);
extern kgdb_debug_hook_t *kgdb_debug_hook;
extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
/* Console */
struct console;
void kgdb_console_write(struct console *co, const char *s, unsigned count);
extern int kgdb_console_setup(struct console *, char *);
/* Prototypes for jmp fns */
#define _JBLEN 9
typedef int jmp_buf[_JBLEN];
extern void longjmp(jmp_buf __jmpb, int __retval);
extern int setjmp(jmp_buf __jmpb);
/* Forced breakpoint */
#define breakpoint() __asm__ __volatile__("trapa #0x3c")
/* Taken from sh-stub.c of GDB 4.18 */
static const char hexchars[] = "0123456789abcdef";
/* Get high hex bits */
static inline char highhex(const int x)
return hexchars[(x >> 4) & 0xf];
/* Get low hex bits */
static inline char lowhex(const int x)
return hexchars[x & 0xf];