summaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h15
-rw-r--r--include/linux/device.h2
-rw-r--r--include/linux/dynamic_debug.h88
-rw-r--r--include/linux/dynamic_printk.h93
-rw-r--r--include/linux/kernel.h4
5 files changed, 97 insertions, 105 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index c61fab1..aca40b9 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -80,6 +80,11 @@
VMLINUX_SYMBOL(__start___tracepoints) = .; \
*(__tracepoints) \
VMLINUX_SYMBOL(__stop___tracepoints) = .; \
+ /* implement dynamic printk debug */ \
+ . = ALIGN(8); \
+ VMLINUX_SYMBOL(__start___verbose) = .; \
+ *(__verbose) \
+ VMLINUX_SYMBOL(__stop___verbose) = .; \
LIKELY_PROFILE() \
BRANCH_PROFILE()
@@ -309,15 +314,7 @@
CPU_DISCARD(init.data) \
CPU_DISCARD(init.rodata) \
MEM_DISCARD(init.data) \
- MEM_DISCARD(init.rodata) \
- /* implement dynamic printk debug */ \
- VMLINUX_SYMBOL(__start___verbose_strings) = .; \
- *(__verbose_strings) \
- VMLINUX_SYMBOL(__stop___verbose_strings) = .; \
- . = ALIGN(8); \
- VMLINUX_SYMBOL(__start___verbose) = .; \
- *(__verbose) \
- VMLINUX_SYMBOL(__stop___verbose) = .;
+ MEM_DISCARD(init.rodata)
#define INIT_TEXT \
*(.init.text) \
diff --git a/include/linux/device.h b/include/linux/device.h
index f98d0cf..2918c0e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -582,7 +582,7 @@ extern const char *dev_driver_string(const struct device *dev);
#if defined(DEBUG)
#define dev_dbg(dev, format, arg...) \
dev_printk(KERN_DEBUG , dev , format , ## arg)
-#elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
+#elif defined(CONFIG_DYNAMIC_DEBUG)
#define dev_dbg(dev, format, ...) do { \
dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
} while (0)
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
new file mode 100644
index 0000000..07781aa
--- /dev/null
+++ b/include/linux/dynamic_debug.h
@@ -0,0 +1,88 @@
+#ifndef _DYNAMIC_DEBUG_H
+#define _DYNAMIC_DEBUG_H
+
+/* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
+ * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
+ * use independent hash functions, to reduce the chance of false positives.
+ */
+extern long long dynamic_debug_enabled;
+extern long long dynamic_debug_enabled2;
+
+/*
+ * An instance of this structure is created in a special
+ * ELF section at every dynamic debug callsite. At runtime,
+ * the special section is treated as an array of these.
+ */
+struct _ddebug {
+ /*
+ * These fields are used to drive the user interface
+ * for selecting and displaying debug callsites.
+ */
+ const char *modname;
+ const char *function;
+ const char *filename;
+ const char *format;
+ char primary_hash;
+ char secondary_hash;
+ unsigned int lineno:24;
+ /*
+ * The flags field controls the behaviour at the callsite.
+ * The bits here are changed dynamically when the user
+ * writes commands to <debugfs>/dynamic_debug/ddebug
+ */
+#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
+#define _DPRINTK_FLAGS_DEFAULT 0
+ unsigned int flags:8;
+} __attribute__((aligned(8)));
+
+
+int ddebug_add_module(struct _ddebug *tab, unsigned int n,
+ const char *modname);
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+extern int ddebug_remove_module(char *mod_name);
+
+#define __dynamic_dbg_enabled(dd) ({ \
+ int __ret = 0; \
+ if (unlikely((dynamic_debug_enabled & (1LL << DEBUG_HASH)) && \
+ (dynamic_debug_enabled2 & (1LL << DEBUG_HASH2)))) \
+ if (unlikely(dd.flags)) \
+ __ret = 1; \
+ __ret; })
+
+#define dynamic_pr_debug(fmt, ...) do { \
+ static struct _ddebug descriptor \
+ __used \
+ __attribute__((section("__verbose"), aligned(8))) = \
+ { KBUILD_MODNAME, __func__, __FILE__, fmt, DEBUG_HASH, \
+ DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT }; \
+ if (__dynamic_dbg_enabled(descriptor)) \
+ printk(KERN_DEBUG KBUILD_MODNAME ":" fmt, \
+ ##__VA_ARGS__); \
+ } while (0)
+
+
+#define dynamic_dev_dbg(dev, fmt, ...) do { \
+ static struct _ddebug descriptor \
+ __used \
+ __attribute__((section("__verbose"), aligned(8))) = \
+ { KBUILD_MODNAME, __func__, __FILE__, fmt, DEBUG_HASH, \
+ DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT }; \
+ if (__dynamic_dbg_enabled(descriptor)) \
+ dev_printk(KERN_DEBUG, dev, \
+ KBUILD_MODNAME ": " fmt, \
+ ##__VA_ARGS__); \
+ } while (0)
+
+#else
+
+static inline int ddebug_remove_module(char *mod)
+{
+ return 0;
+}
+
+#define dynamic_pr_debug(fmt, ...) do { } while (0)
+#define dynamic_dev_dbg(dev, format, ...) do { } while (0)
+#endif
+
+#endif
diff --git a/include/linux/dynamic_printk.h b/include/linux/dynamic_printk.h
deleted file mode 100644
index 2d528d0..0000000
--- a/include/linux/dynamic_printk.h
+++ /dev/null
@@ -1,93 +0,0 @@
-#ifndef _DYNAMIC_PRINTK_H
-#define _DYNAMIC_PRINTK_H
-
-#define DYNAMIC_DEBUG_HASH_BITS 6
-#define DEBUG_HASH_TABLE_SIZE (1 << DYNAMIC_DEBUG_HASH_BITS)
-
-#define TYPE_BOOLEAN 1
-
-#define DYNAMIC_ENABLED_ALL 0
-#define DYNAMIC_ENABLED_NONE 1
-#define DYNAMIC_ENABLED_SOME 2
-
-extern int dynamic_enabled;
-
-/* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
- * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
- * use independent hash functions, to reduce the chance of false positives.
- */
-extern long long dynamic_printk_enabled;
-extern long long dynamic_printk_enabled2;
-
-struct mod_debug {
- char *modname;
- char *logical_modname;
- char *flag_names;
- int type;
- int hash;
- int hash2;
-} __attribute__((aligned(8)));
-
-int register_dynamic_debug_module(char *mod_name, int type, char *share_name,
- char *flags, int hash, int hash2);
-
-#if defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
-extern int unregister_dynamic_debug_module(char *mod_name);
-extern int __dynamic_dbg_enabled_helper(char *modname, int type,
- int value, int hash);
-
-#define __dynamic_dbg_enabled(module, type, value, level, hash) ({ \
- int __ret = 0; \
- if (unlikely((dynamic_printk_enabled & (1LL << DEBUG_HASH)) && \
- (dynamic_printk_enabled2 & (1LL << DEBUG_HASH2)))) \
- __ret = __dynamic_dbg_enabled_helper(module, type, \
- value, hash);\
- __ret; })
-
-#define dynamic_pr_debug(fmt, ...) do { \
- static char mod_name[] \
- __attribute__((section("__verbose_strings"))) \
- = KBUILD_MODNAME; \
- static struct mod_debug descriptor \
- __used \
- __attribute__((section("__verbose"), aligned(8))) = \
- { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\
- if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \
- 0, 0, DEBUG_HASH)) \
- printk(KERN_DEBUG KBUILD_MODNAME ":" fmt, \
- ##__VA_ARGS__); \
- } while (0)
-
-#define dynamic_dev_dbg(dev, format, ...) do { \
- static char mod_name[] \
- __attribute__((section("__verbose_strings"))) \
- = KBUILD_MODNAME; \
- static struct mod_debug descriptor \
- __used \
- __attribute__((section("__verbose"), aligned(8))) = \
- { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\
- if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \
- 0, 0, DEBUG_HASH)) \
- dev_printk(KERN_DEBUG, dev, \
- KBUILD_MODNAME ": " format, \
- ##__VA_ARGS__); \
- } while (0)
-
-#else
-
-static inline int unregister_dynamic_debug_module(const char *mod_name)
-{
- return 0;
-}
-static inline int __dynamic_dbg_enabled_helper(char *modname, int type,
- int value, int hash)
-{
- return 0;
-}
-
-#define __dynamic_dbg_enabled(module, type, value, level, hash) ({ 0; })
-#define dynamic_pr_debug(fmt, ...) do { } while (0)
-#define dynamic_dev_dbg(dev, format, ...) do { } while (0)
-#endif
-
-#endif
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 7fa3718..b5496ec 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -16,7 +16,7 @@
#include <linux/log2.h>
#include <linux/typecheck.h>
#include <linux/ratelimit.h>
-#include <linux/dynamic_printk.h>
+#include <linux/dynamic_debug.h>
#include <asm/byteorder.h>
#include <asm/bug.h>
@@ -358,7 +358,7 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
#if defined(DEBUG)
#define pr_debug(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
-#elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
+#elif defined(CONFIG_DYNAMIC_DEBUG)
#define pr_debug(fmt, ...) do { \
dynamic_pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)
OpenPOWER on IntegriCloud