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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 <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
* Amit S. Kale <akale@veritas.com>
*
* Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
* Henry Bell <henry.bell@st.com>
*
* Header file for low-level support for remote debug using GDB.
*
*/
#ifndef __KGDB_H
#define __KGDB_H
#include <asm/ptrace.h>
struct console;
/* 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_done_init;
extern int kgdb_enabled;
extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
extern int kgdb_halt; /* Execute initial breakpoint at startup */
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;
extern int kgdb_console_setup(struct console *, char *);
/* Init and interface stuff */
extern int kgdb_init(void);
extern int (*kgdb_serial_setup)(void);
extern int (*kgdb_getchar)(void);
extern void (*kgdb_putchar)(int);
struct kgdb_sermap {
char *name;
int namelen;
int (*setup_fn)(struct console *, char *);
struct kgdb_sermap *next;
};
extern void kgdb_register_sermap(struct kgdb_sermap *map);
extern struct kgdb_sermap *kgdb_porttype;
/* 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;
extern void breakpoint(void);
/* Console */
struct console;
void kgdb_console_write(struct console *co, const char *s, unsigned count);
void kgdb_console_init(void);
/* 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);
/* Variadic macro to print our own message to the console */
#define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__)
/* Forced breakpoint */
#define BREAKPOINT() do { \
if (kgdb_enabled) { \
asm volatile("trapa #0xff"); \
} \
} while (0)
/* KGDB should be able to flush all kernel text space */
#if defined(CONFIG_CPU_SH4)
#define kgdb_flush_icache_range(start, end) \
{ \
extern void __flush_purge_region(void *, int); \
__flush_purge_region((void*)(start), (int)(end) - (int)(start));\
flush_icache_range((start), (end)); \
}
#else
#define kgdb_flush_icache_range(start, end) do { } while (0)
#endif
/* Kernel assert macros */
#ifdef CONFIG_KGDB_KERNEL_ASSERTS
/* Predefined conditions */
#define KA_VALID_ERRNO(errno) ((errno) > 0 && (errno) <= EMEDIUMTYPE)
#define KA_VALID_PTR_ERR(ptr) KA_VALID_ERRNO(-PTR_ERR(ptr))
#define KA_VALID_KPTR(ptr) (!(ptr) || \
((void *)(ptr) >= (void *)PAGE_OFFSET && \
(void *)(ptr) < ERR_PTR(-EMEDIUMTYPE)))
#define KA_VALID_PTRORERR(errptr) \
(KA_VALID_KPTR(errptr) || KA_VALID_PTR_ERR(errptr))
#define KA_HELD_GKL() (current->lock_depth >= 0)
/* The actual assert */
#define KGDB_ASSERT(condition, message) do { \
if (!(condition) && (kgdb_enabled)) { \
KGDB_PRINTK("Assertion failed at %s:%d: %s\n", \
__FILE__, __LINE__, message);\
BREAKPOINT(); \
} \
} while (0)
#else
#define KGDB_ASSERT(condition, message)
#endif
/* 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];
}
#endif
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