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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-21 11:08:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-21 11:08:05 -0700
commit90b9a32d8f441369b2f97a765d2d957b531eb653 (patch)
tree3146d251a983ba12226e75c121613de6f051af8b /include
parent8b108c609adefd98577c35f0a41497a610041a6c (diff)
parent4402c153cb9c549cd21d6007ef0dfac50c8d148d (diff)
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Merge branch 'kdb-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'kdb-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: (25 commits) kdb,debug_core: Allow the debug core to receive a panic notification MAINTAINERS: update kgdb, kdb, and debug_core info debug_core,kdb: Allow the debug core to process a recursive debug entry printk,kdb: capture printk() when in kdb shell kgdboc,kdb: Allow kdb to work on a non open console port kgdb: Add the ability to schedule a breakpoint via a tasklet mips,kgdb: kdb low level trap catch and stack trace powerpc,kgdb: Introduce low level trap catching x86,kgdb: Add low level debug hook kgdb: remove post_primary_code references kgdb,docs: Update the kgdb docs to include kdb kgdboc,keyboard: Keyboard driver for kdb with kgdb kgdb: gdb "monitor" -> kdb passthrough sparc,sunzilog: Add console polling support for sunzilog serial driver sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code kgdb,8250,pl011: Return immediately from console poll kgdb: core changes to support kdb kdb: core for kgdb back end (2 of 2) kdb: core for kgdb back end (1 of 2) kgdb,blackfin: Add in kgdb_arch_set_pc for blackfin ...
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/kmap_types.h3
-rw-r--r--include/linux/kdb.h117
-rw-r--r--include/linux/kgdb.h41
-rw-r--r--include/linux/serial_core.h1
4 files changed, 145 insertions, 17 deletions
diff --git a/include/asm-generic/kmap_types.h b/include/asm-generic/kmap_types.h
index e5f234a..97e807c 100644
--- a/include/asm-generic/kmap_types.h
+++ b/include/asm-generic/kmap_types.h
@@ -28,7 +28,8 @@ KMAP_D(15) KM_UML_USERCOPY,
KMAP_D(16) KM_IRQ_PTE,
KMAP_D(17) KM_NMI,
KMAP_D(18) KM_NMI_PTE,
-KMAP_D(19) KM_TYPE_NR
+KMAP_D(19) KM_KDB,
+KMAP_D(20) KM_TYPE_NR
};
#undef KMAP_D
diff --git a/include/linux/kdb.h b/include/linux/kdb.h
new file mode 100644
index 0000000..ccb2b3e
--- /dev/null
+++ b/include/linux/kdb.h
@@ -0,0 +1,117 @@
+#ifndef _KDB_H
+#define _KDB_H
+
+/*
+ * Kernel Debugger Architecture Independent Global Headers
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (C) 2000 Stephane Eranian <eranian@hpl.hp.com>
+ * Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com>
+ */
+
+#ifdef CONFIG_KGDB_KDB
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <asm/atomic.h>
+
+#define KDB_POLL_FUNC_MAX 5
+extern int kdb_poll_idx;
+
+/*
+ * kdb_initial_cpu is initialized to -1, and is set to the cpu
+ * number whenever the kernel debugger is entered.
+ */
+extern int kdb_initial_cpu;
+extern atomic_t kdb_event;
+
+/*
+ * kdb_diemsg
+ *
+ * Contains a pointer to the last string supplied to the
+ * kernel 'die' panic function.
+ */
+extern const char *kdb_diemsg;
+
+#define KDB_FLAG_EARLYKDB (1 << 0) /* set from boot parameter kdb=early */
+#define KDB_FLAG_CATASTROPHIC (1 << 1) /* A catastrophic event has occurred */
+#define KDB_FLAG_CMD_INTERRUPT (1 << 2) /* Previous command was interrupted */
+#define KDB_FLAG_NOIPI (1 << 3) /* Do not send IPIs */
+#define KDB_FLAG_ONLY_DO_DUMP (1 << 4) /* Only do a dump, used when
+ * kdb is off */
+#define KDB_FLAG_NO_CONSOLE (1 << 5) /* No console is available,
+ * kdb is disabled */
+#define KDB_FLAG_NO_VT_CONSOLE (1 << 6) /* No VT console is available, do
+ * not use keyboard */
+#define KDB_FLAG_NO_I8042 (1 << 7) /* No i8042 chip is available, do
+ * not use keyboard */
+
+extern int kdb_flags; /* Global flags, see kdb_state for per cpu state */
+
+extern void kdb_save_flags(void);
+extern void kdb_restore_flags(void);
+
+#define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_##flag)
+#define KDB_FLAG_SET(flag) ((void)(kdb_flags |= KDB_FLAG_##flag))
+#define KDB_FLAG_CLEAR(flag) ((void)(kdb_flags &= ~KDB_FLAG_##flag))
+
+/*
+ * External entry point for the kernel debugger. The pt_regs
+ * at the time of entry are supplied along with the reason for
+ * entry to the kernel debugger.
+ */
+
+typedef enum {
+ KDB_REASON_ENTER = 1, /* KDB_ENTER() trap/fault - regs valid */
+ KDB_REASON_ENTER_SLAVE, /* KDB_ENTER_SLAVE() trap/fault - regs valid */
+ KDB_REASON_BREAK, /* Breakpoint inst. - regs valid */
+ KDB_REASON_DEBUG, /* Debug Fault - regs valid */
+ KDB_REASON_OOPS, /* Kernel Oops - regs valid */
+ KDB_REASON_SWITCH, /* CPU switch - regs valid*/
+ KDB_REASON_KEYBOARD, /* Keyboard entry - regs valid */
+ KDB_REASON_NMI, /* Non-maskable interrupt; regs valid */
+ KDB_REASON_RECURSE, /* Recursive entry to kdb;
+ * regs probably valid */
+ KDB_REASON_SSTEP, /* Single Step trap. - regs valid */
+} kdb_reason_t;
+
+extern int kdb_trap_printk;
+extern int vkdb_printf(const char *fmt, va_list args)
+ __attribute__ ((format (printf, 1, 0)));
+extern int kdb_printf(const char *, ...)
+ __attribute__ ((format (printf, 1, 2)));
+typedef int (*kdb_printf_t)(const char *, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+extern void kdb_init(int level);
+
+/* Access to kdb specific polling devices */
+typedef int (*get_char_func)(void);
+extern get_char_func kdb_poll_funcs[];
+extern int kdb_get_kbd_char(void);
+
+static inline
+int kdb_process_cpu(const struct task_struct *p)
+{
+ unsigned int cpu = task_thread_info(p)->cpu;
+ if (cpu > num_possible_cpus())
+ cpu = 0;
+ return cpu;
+}
+
+/* kdb access to register set for stack dumping */
+extern struct pt_regs *kdb_current_regs;
+
+#else /* ! CONFIG_KGDB_KDB */
+#define kdb_printf(...)
+#define kdb_init(x)
+#endif /* CONFIG_KGDB_KDB */
+enum {
+ KDB_NOT_INITIALIZED,
+ KDB_INIT_EARLY,
+ KDB_INIT_FULL,
+};
+#endif /* !_KDB_H */
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 19ec41a..6c784ab 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -16,10 +16,12 @@
#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;
/**
@@ -34,20 +36,6 @@ struct pt_regs;
extern int kgdb_skipexception(int exception, struct pt_regs *regs);
/**
- * kgdb_post_primary_code - (optional) Save error vector/code numbers.
- * @regs: Original pt_regs.
- * @e_vector: Original error vector.
- * @err_code: Original error code.
- *
- * This is usually 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 - (optional) Disable hardware debugging hook
* @regs: Current &struct pt_regs.
*
@@ -72,6 +60,7 @@ struct uart_port;
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;
@@ -202,6 +191,17 @@ kgdb_arch_handle_exception(int vector, int signo, int err_code,
*/
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);
@@ -247,6 +247,8 @@ struct kgdb_arch {
* 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;
@@ -256,6 +258,7 @@ struct kgdb_io {
int (*init) (void);
void (*pre_exception) (void);
void (*post_exception) (void);
+ int is_console;
};
extern struct kgdb_arch arch_kgdb_ops;
@@ -264,12 +267,14 @@ 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, 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,
@@ -278,5 +283,9 @@ extern int kgdb_nmicallback(int cpu, void *regs);
extern int kgdb_single_step;
extern atomic_t kgdb_active;
-
+#define in_dbg_master() \
+ (raw_smp_processor_id() == atomic_read(&kgdb_active))
+#else /* ! CONFIG_KGDB */
+#define in_dbg_master() (0)
+#endif /* ! CONFIG_KGDB */
#endif /* _KGDB_H_ */
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 09d0d2d..f10db6e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -250,6 +250,7 @@ struct uart_ops {
#endif
};
+#define NO_POLL_CHAR 0x00ff0000
#define UART_CONFIG_TYPE (1 << 0)
#define UART_CONFIG_IRQ (1 << 1)