147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* Based on original code by Glenn Engel, Jim Kingdon,
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* David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
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* Amit S. Kale <akale@veritas.com>
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*
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* Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
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* Henry Bell <henry.bell@st.com>
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*
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* Header file for low-level support for remote debug using GDB.
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*
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*/
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#ifndef __KGDB_H
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#define __KGDB_H
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#include <asm/ptrace.h>
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struct console;
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/* Same as pt_regs but has vbr in place of syscall_nr */
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struct kgdb_regs {
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unsigned long regs[16];
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unsigned long pc;
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unsigned long pr;
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unsigned long sr;
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unsigned long gbr;
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unsigned long mach;
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unsigned long macl;
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unsigned long vbr;
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};
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/* State info */
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extern char kgdb_in_gdb_mode;
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extern int kgdb_done_init;
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extern int kgdb_enabled;
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extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
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extern int kgdb_halt; /* Execute initial breakpoint at startup */
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extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
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/* SCI */
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extern int kgdb_portnum;
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extern int kgdb_baud;
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extern char kgdb_parity;
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extern char kgdb_bits;
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extern int kgdb_console_setup(struct console *, char *);
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/* Init and interface stuff */
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extern int kgdb_init(void);
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extern int (*kgdb_serial_setup)(void);
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extern int (*kgdb_getchar)(void);
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extern void (*kgdb_putchar)(int);
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struct kgdb_sermap {
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char *name;
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int namelen;
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int (*setup_fn)(struct console *, char *);
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struct kgdb_sermap *next;
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};
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extern void kgdb_register_sermap(struct kgdb_sermap *map);
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extern struct kgdb_sermap *kgdb_porttype;
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/* Trap functions */
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typedef void (kgdb_debug_hook_t)(struct pt_regs *regs);
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typedef void (kgdb_bus_error_hook_t)(void);
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extern kgdb_debug_hook_t *kgdb_debug_hook;
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extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
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extern void breakpoint(void);
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/* Console */
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struct console;
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void kgdb_console_write(struct console *co, const char *s, unsigned count);
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void kgdb_console_init(void);
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/* Prototypes for jmp fns */
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#define _JBLEN 9
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typedef int jmp_buf[_JBLEN];
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extern void longjmp(jmp_buf __jmpb, int __retval);
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extern int setjmp(jmp_buf __jmpb);
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/* Variadic macro to print our own message to the console */
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#define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__)
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/* Forced breakpoint */
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#define BREAKPOINT() do { \
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if (kgdb_enabled) { \
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asm volatile("trapa #0xff"); \
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} \
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} while (0)
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/* KGDB should be able to flush all kernel text space */
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#if defined(CONFIG_CPU_SH4)
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#define kgdb_flush_icache_range(start, end) \
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{ \
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extern void __flush_purge_region(void *, int); \
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__flush_purge_region((void*)(start), (int)(end) - (int)(start));\
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flush_icache_range((start), (end)); \
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}
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#else
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#define kgdb_flush_icache_range(start, end) do { } while (0)
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#endif
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/* Kernel assert macros */
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#ifdef CONFIG_KGDB_KERNEL_ASSERTS
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/* Predefined conditions */
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#define KA_VALID_ERRNO(errno) ((errno) > 0 && (errno) <= EMEDIUMTYPE)
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#define KA_VALID_PTR_ERR(ptr) KA_VALID_ERRNO(-PTR_ERR(ptr))
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#define KA_VALID_KPTR(ptr) (!(ptr) || \
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((void *)(ptr) >= (void *)PAGE_OFFSET && \
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(void *)(ptr) < ERR_PTR(-EMEDIUMTYPE)))
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#define KA_VALID_PTRORERR(errptr) \
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(KA_VALID_KPTR(errptr) || KA_VALID_PTR_ERR(errptr))
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#define KA_HELD_GKL() (current->lock_depth >= 0)
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/* The actual assert */
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#define KGDB_ASSERT(condition, message) do { \
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if (!(condition) && (kgdb_enabled)) { \
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KGDB_PRINTK("Assertion failed at %s:%d: %s\n", \
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__FILE__, __LINE__, message);\
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BREAKPOINT(); \
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} \
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} while (0)
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#else
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#define KGDB_ASSERT(condition, message)
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#endif
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/* Taken from sh-stub.c of GDB 4.18 */
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static const char hexchars[] = "0123456789abcdef";
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/* Get high hex bits */
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static inline char highhex(const int x)
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{
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return hexchars[(x >> 4) & 0xf];
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}
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/* Get low hex bits */
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static inline char lowhex(const int x)
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{
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return hexchars[x & 0xf];
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}
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#endif
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