forked from luck/tmp_suning_uos_patched
5dd11d5d47
The only way the debugger can handle a trap in inside rcu_lock, notify_die, or atomic_notifier_call_chain without a recursive fault is to have a low level "first opportunity handler" do_trap_or_bp() handler. Generally this will be something the vast majority of folks will not need, but for those who need it, it is added as a kernel .config option called KGDB_LOW_LEVEL_TRAP. Also added was a die notification for oops such that kdb can catch an oops for analysis. There appeared to be no obvious way to pass the struct pt_regs from the original exception back to the stack back tracer, so a special case was added to show_stack() for when kdb is active because you generally desire to generally look at the back trace of the original exception. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Ralf Baechle <ralf@linux-mips.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#ifndef __ASM_KGDB_H_
|
|
#define __ASM_KGDB_H_
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/sgidefs.h>
|
|
|
|
#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
|
|
(_MIPS_ISA == _MIPS_ISA_MIPS32)
|
|
|
|
#define KGDB_GDB_REG_SIZE 32
|
|
|
|
#elif (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
|
|
(_MIPS_ISA == _MIPS_ISA_MIPS64)
|
|
|
|
#ifdef CONFIG_32BIT
|
|
#define KGDB_GDB_REG_SIZE 32
|
|
#else /* CONFIG_CPU_32BIT */
|
|
#define KGDB_GDB_REG_SIZE 64
|
|
#endif
|
|
#else
|
|
#error "Need to set KGDB_GDB_REG_SIZE for MIPS ISA"
|
|
#endif /* _MIPS_ISA */
|
|
|
|
#define BUFMAX 2048
|
|
#if (KGDB_GDB_REG_SIZE == 32)
|
|
#define NUMREGBYTES (90*sizeof(u32))
|
|
#define NUMCRITREGBYTES (12*sizeof(u32))
|
|
#else
|
|
#define NUMREGBYTES (90*sizeof(u64))
|
|
#define NUMCRITREGBYTES (12*sizeof(u64))
|
|
#endif
|
|
#define BREAK_INSTR_SIZE 4
|
|
#define CACHE_FLUSH_IS_SAFE 0
|
|
|
|
extern void arch_kgdb_breakpoint(void);
|
|
extern int kgdb_early_setup;
|
|
extern void *saved_vectors[32];
|
|
extern void handle_exception(struct pt_regs *regs);
|
|
extern void breakinst(void);
|
|
extern int kgdb_ll_trap(int cmd, const char *str,
|
|
struct pt_regs *regs, long err, int trap, int sig);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_KGDB_H_ */
|