#include <linux/serial_8250.h>
#include <linux/linkage.h>
#include <linux/init.h>
-
#include <asm/atomic.h>
+#ifdef CONFIG_HAVE_ARCH_KGDB
#include <asm/kgdb.h>
+#endif
+#ifdef CONFIG_KGDB
struct pt_regs;
-/*
- * kgdb_skipexception - Bail out of KGDB when we've been triggered.
+/**
+ * kgdb_skipexception - (optional) exit kgdb_handle_exception early
* @exception: Exception vector number
* @regs: Current &struct pt_regs.
*
- * On some architectures we need to skip a breakpoint exception when
- * it occurs after a breakpoint has been removed.
+ * On some architectures it is required to skip a breakpoint
+ * exception when it occurs after a breakpoint has been removed.
+ * This can be implemented in the architecture specific portion of kgdb.
*/
extern int kgdb_skipexception(int exception, struct pt_regs *regs);
-/*
- * kgdb_post_primary_code - Save error vector/code numbers.
- * @regs: Original pt_regs.
- * @e_vector: Original error vector.
- * @err_code: Original error code.
- *
- * This is needed on architectures which support SMP and KGDB.
- * This function is called after all the secondary cpus have been put
- * to a know spin state and the primary CPU has control over KGDB.
- */
-extern void kgdb_post_primary_code(struct pt_regs *regs, int e_vector,
- int err_code);
-
-/*
- * kgdb_disable_hw_debug - Disable hardware debugging while we in kgdb.
+/**
+ * kgdb_disable_hw_debug - (optional) Disable hardware debugging hook
* @regs: Current &struct pt_regs.
*
* This function will be called if the particular architecture must
struct task_struct;
struct uart_port;
-/* To enter the debugger explicitly. */
+/**
+ * kgdb_breakpoint - compiled in breakpoint
+ *
+ * This will be implemented as a static inline per architecture. This
+ * function is called by the kgdb core to execute an architecture
+ * specific trap to cause kgdb to enter the exception processing.
+ *
+ */
void kgdb_breakpoint(void);
extern int kgdb_connected;
+extern int kgdb_io_module_registered;
extern atomic_t kgdb_setting_breakpoint;
extern atomic_t kgdb_cpu_doing_single_step;
* Functions each KGDB-supporting architecture must provide:
*/
-/*
+/**
* kgdb_arch_init - Perform any architecture specific initalization.
*
* This function will handle the initalization of any architecture
*/
extern int kgdb_arch_init(void);
-/*
+/**
* kgdb_arch_exit - Perform any architecture specific uninitalization.
*
* This function will handle the uninitalization of any architecture
*/
extern void kgdb_arch_exit(void);
-/*
+/**
* pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
* @gdb_regs: A pointer to hold the registers in the order GDB wants.
* @regs: The &struct pt_regs of the current process.
*/
extern void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs);
-/*
+/**
* sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
* @gdb_regs: A pointer to hold the registers in the order GDB wants.
* @p: The &struct task_struct of the desired process.
extern void
sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p);
-/*
+/**
* gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
* @gdb_regs: A pointer to hold the registers we've received from GDB.
* @regs: A pointer to a &struct pt_regs to hold these values in.
*/
extern void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs);
-/*
+/**
* kgdb_arch_handle_exception - Handle architecture specific GDB packets.
* @vector: The error vector of the exception that happened.
* @signo: The signal number of the exception that happened.
char *remcom_out_buffer,
struct pt_regs *regs);
-/*
+/**
* kgdb_roundup_cpus - Get other CPUs into a holding pattern
* @flags: Current IRQ state
*
* On SMP systems, we need to get the attention of the other CPUs
- * and get them be in a known state. This should do what is needed
+ * and get them into a known state. This should do what is needed
* to get the other CPUs to call kgdb_wait(). Note that on some arches,
* the NMI approach is not used for rounding up all the CPUs. For example,
* in case of MIPS, smp_call_function() is used to roundup CPUs. In
*/
extern void kgdb_roundup_cpus(unsigned long flags);
+/**
+ * kgdb_arch_set_pc - Generic call back to the program counter
+ * @regs: Current &struct pt_regs.
+ * @pc: The new value for the program counter
+ *
+ * This function handles updating the program counter and requires an
+ * architecture specific implementation.
+ */
+extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);
+
+
/* Optional functions. */
extern int kgdb_validate_break_address(unsigned long addr);
extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);
-/*
+/**
+ * kgdb_arch_late - Perform any architecture specific initalization.
+ *
+ * This function will handle the late initalization of any
+ * architecture specific callbacks. This is an optional function for
+ * handling things like late initialization of hw breakpoints. The
+ * default implementation does nothing.
+ */
+extern void kgdb_arch_late(void);
+
+
+/**
* struct kgdb_arch - Describe architecture specific values.
* @gdb_bpt_instr: The instruction to trigger a breakpoint.
* @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
void (*correct_hw_break)(void);
};
-/*
+/**
* struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
* @name: Name of the I/O driver.
* @read_char: Pointer to a function that will return one char.
* the I/O driver.
* @post_exception: Pointer to a function that will do any cleanup work
* for the I/O driver.
+ * @is_console: 1 if the end device is a console 0 if the I/O device is
+ * not a console
*/
struct kgdb_io {
const char *name;
int (*init) (void);
void (*pre_exception) (void);
void (*post_exception) (void);
+ int is_console;
};
extern struct kgdb_arch arch_kgdb_ops;
+extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs);
+
extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
+extern struct kgdb_io *dbg_io_ops;
-extern int kgdb_hex2long(char **ptr, long *long_val);
+extern int kgdb_hex2long(char **ptr, unsigned long *long_val);
extern int kgdb_mem2hex(char *mem, char *buf, int count);
extern int kgdb_hex2mem(char *buf, char *mem, int count);
extern int kgdb_isremovedbreak(unsigned long addr);
+extern void kgdb_schedule_breakpoint(void);
extern int
kgdb_handle_exception(int ex_vector, int signo, int err_code,
extern int kgdb_single_step;
extern atomic_t kgdb_active;
-
+#define in_dbg_master() \
+ (raw_smp_processor_id() == atomic_read(&kgdb_active))
+extern bool dbg_is_early;
+extern void __init dbg_late_init(void);
+#else /* ! CONFIG_KGDB */
+#define in_dbg_master() (0)
+#define dbg_late_init()
+#endif /* ! CONFIG_KGDB */
#endif /* _KGDB_H_ */
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