1 /* 2 * Created by: Jason Wessel <jason.wessel@windriver.com> 3 * 4 * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved. 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #ifndef _DEBUG_CORE_H_ 12 #define _DEBUG_CORE_H_ 13 /* 14 * These are the private implementation headers between the kernel 15 * debugger core and the debugger front end code. 16 */ 17 18 /* kernel debug core data structures */ 19 struct kgdb_state { 20 int ex_vector; 21 int signo; 22 int err_code; 23 int cpu; 24 int pass_exception; 25 unsigned long thr_query; 26 unsigned long threadid; 27 long kgdb_usethreadid; 28 struct pt_regs *linux_regs; 29 }; 30 31 /* Exception state values */ 32 #define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */ 33 #define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */ 34 #define DCPU_IS_SLAVE 0x4 /* Slave cpu enter exception */ 35 #define DCPU_SSTEP 0x8 /* CPU is single stepping */ 36 37 struct debuggerinfo_struct { 38 void *debuggerinfo; 39 struct task_struct *task; 40 int exception_state; 41 int ret_state; 42 int irq_depth; 43 }; 44 45 extern struct debuggerinfo_struct kgdb_info[]; 46 47 /* kernel debug core break point routines */ 48 extern int dbg_remove_all_break(void); 49 extern int dbg_set_sw_break(unsigned long addr); 50 extern int dbg_remove_sw_break(unsigned long addr); 51 extern int dbg_activate_sw_breakpoints(void); 52 extern int dbg_deactivate_sw_breakpoints(void); 53 54 /* polled character access to i/o module */ 55 extern int dbg_io_get_char(void); 56 57 /* stub return value for switching between the gdbstub and kdb */ 58 #define DBG_PASS_EVENT -12345 59 /* Switch from one cpu to another */ 60 #define DBG_SWITCH_CPU_EVENT -123456 61 extern int dbg_switch_cpu; 62 63 /* gdbstub interface functions */ 64 extern int gdb_serial_stub(struct kgdb_state *ks); 65 extern void gdbstub_msg_write(const char *s, int len); 66 67 /* gdbstub functions used for kdb <-> gdbstub transition */ 68 extern int gdbstub_state(struct kgdb_state *ks, char *cmd); 69 extern int dbg_kdb_mode; 70 71 #ifdef CONFIG_KGDB_KDB 72 extern int kdb_stub(struct kgdb_state *ks); 73 extern int kdb_parse(const char *cmdstr); 74 #else /* ! CONFIG_KGDB_KDB */ 75 static inline int kdb_stub(struct kgdb_state *ks) 76 { 77 return DBG_PASS_EVENT; 78 } 79 #endif /* CONFIG_KGDB_KDB */ 80 81 #endif /* _DEBUG_CORE_H_ */ 82