/* * 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 #endif