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-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 c61fab1dd2f..aca40b93bd2 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -80,6 +80,11 @@
80 VMLINUX_SYMBOL(__start___tracepoints) = .; \ 80 VMLINUX_SYMBOL(__start___tracepoints) = .; \
81 *(__tracepoints) \ 81 *(__tracepoints) \
82 VMLINUX_SYMBOL(__stop___tracepoints) = .; \ 82 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
83 /* implement dynamic printk debug */ \
84 . = ALIGN(8); \
85 VMLINUX_SYMBOL(__start___verbose) = .; \
86 *(__verbose) \
87 VMLINUX_SYMBOL(__stop___verbose) = .; \
83 LIKELY_PROFILE() \ 88 LIKELY_PROFILE() \
84 BRANCH_PROFILE() 89 BRANCH_PROFILE()
85 90
@@ -309,15 +314,7 @@
309 CPU_DISCARD(init.data) \ 314 CPU_DISCARD(init.data) \
310 CPU_DISCARD(init.rodata) \ 315 CPU_DISCARD(init.rodata) \
311 MEM_DISCARD(init.data) \ 316 MEM_DISCARD(init.data) \
312 MEM_DISCARD(init.rodata) \ 317 MEM_DISCARD(init.rodata)
313 /* implement dynamic printk debug */ \
314 VMLINUX_SYMBOL(__start___verbose_strings) = .; \
315 *(__verbose_strings) \
316 VMLINUX_SYMBOL(__stop___verbose_strings) = .; \
317 . = ALIGN(8); \
318 VMLINUX_SYMBOL(__start___verbose) = .; \
319 *(__verbose) \
320 VMLINUX_SYMBOL(__stop___verbose) = .;
321 318
322#define INIT_TEXT \ 319#define INIT_TEXT \
323 *(.init.text) \ 320 *(.init.text) \
diff --git a/include/linux/device.h b/include/linux/device.h
index f98d0cfb4f8..2918c0e8fdf 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);
582#if defined(DEBUG) 582#if defined(DEBUG)
583#define dev_dbg(dev, format, arg...) \ 583#define dev_dbg(dev, format, arg...) \
584 dev_printk(KERN_DEBUG , dev , format , ## arg) 584 dev_printk(KERN_DEBUG , dev , format , ## arg)
585#elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG) 585#elif defined(CONFIG_DYNAMIC_DEBUG)
586#define dev_dbg(dev, format, ...) do { \ 586#define dev_dbg(dev, format, ...) do { \
587 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \ 587 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
588 } while (0) 588 } while (0)
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
new file mode 100644
index 00000000000..07781aaa116
--- /dev/null
+++ b/include/linux/dynamic_debug.h
@@ -0,0 +1,88 @@
1#ifndef _DYNAMIC_DEBUG_H
2#define _DYNAMIC_DEBUG_H
3
4/* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
5 * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
6 * use independent hash functions, to reduce the chance of false positives.
7 */
8extern long long dynamic_debug_enabled;
9extern long long dynamic_debug_enabled2;
10
11/*
12 * An instance of this structure is created in a special
13 * ELF section at every dynamic debug callsite. At runtime,
14 * the special section is treated as an array of these.
15 */
16struct _ddebug {
17 /*
18 * These fields are used to drive the user interface
19 * for selecting and displaying debug callsites.
20 */
21 const char *modname;
22 const char *function;
23 const char *filename;
24 const char *format;
25 char primary_hash;
26 char secondary_hash;
27 unsigned int lineno:24;
28 /*
29 * The flags field controls the behaviour at the callsite.
30 * The bits here are changed dynamically when the user
31 * writes commands to <debugfs>/dynamic_debug/ddebug
32 */
33#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
34#define _DPRINTK_FLAGS_DEFAULT 0
35 unsigned int flags:8;
36} __attribute__((aligned(8)));
37
38
39int ddebug_add_module(struct _ddebug *tab, unsigned int n,
40 const char *modname);
41
42#if defined(CONFIG_DYNAMIC_DEBUG)
43extern int ddebug_remove_module(char *mod_name);
44
45#define __dynamic_dbg_enabled(dd) ({ \
46 int __ret = 0; \
47 if (unlikely((dynamic_debug_enabled & (1LL << DEBUG_HASH)) && \
48 (dynamic_debug_enabled2 & (1LL << DEBUG_HASH2)))) \
49 if (unlikely(dd.flags)) \
50 __ret = 1; \
51 __ret; })
52
53#define dynamic_pr_debug(fmt, ...) do { \
54 static struct _ddebug descriptor \
55 __used \
56 __attribute__((section("__verbose"), aligned(8))) = \
57 { KBUILD_MODNAME, __func__, __FILE__, fmt, DEBUG_HASH, \
58 DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT }; \
59 if (__dynamic_dbg_enabled(descriptor)) \
60 printk(KERN_DEBUG KBUILD_MODNAME ":" fmt, \
61 ##__VA_ARGS__); \
62 } while (0)
63
64
65#define dynamic_dev_dbg(dev, fmt, ...) do { \
66 static struct _ddebug descriptor \
67 __used \
68 __attribute__((section("__verbose"), aligned(8))) = \
69 { KBUILD_MODNAME, __func__, __FILE__, fmt, DEBUG_HASH, \
70 DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT }; \
71 if (__dynamic_dbg_enabled(descriptor)) \
72 dev_printk(KERN_DEBUG, dev, \
73 KBUILD_MODNAME ": " fmt, \
74 ##__VA_ARGS__); \
75 } while (0)
76
77#else
78
79static inline int ddebug_remove_module(char *mod)
80{
81 return 0;
82}
83
84#define dynamic_pr_debug(fmt, ...) do { } while (0)
85#define dynamic_dev_dbg(dev, format, ...) do { } while (0)
86#endif
87
88#endif
diff --git a/include/linux/dynamic_printk.h b/include/linux/dynamic_printk.h
deleted file mode 100644
index 2d528d00907..00000000000
--- a/include/linux/dynamic_printk.h
+++ /dev/null
@@ -1,93 +0,0 @@
1#ifndef _DYNAMIC_PRINTK_H
2#define _DYNAMIC_PRINTK_H
3
4#define DYNAMIC_DEBUG_HASH_BITS 6
5#define DEBUG_HASH_TABLE_SIZE (1 << DYNAMIC_DEBUG_HASH_BITS)
6
7#define TYPE_BOOLEAN 1
8
9#define DYNAMIC_ENABLED_ALL 0
10#define DYNAMIC_ENABLED_NONE 1
11#define DYNAMIC_ENABLED_SOME 2
12
13extern int dynamic_enabled;
14
15/* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
16 * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
17 * use independent hash functions, to reduce the chance of false positives.
18 */
19extern long long dynamic_printk_enabled;
20extern long long dynamic_printk_enabled2;
21
22struct mod_debug {
23 char *modname;
24 char *logical_modname;
25 char *flag_names;
26 int type;
27 int hash;
28 int hash2;
29} __attribute__((aligned(8)));
30
31int register_dynamic_debug_module(char *mod_name, int type, char *share_name,
32 char *flags, int hash, int hash2);
33
34#if defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
35extern int unregister_dynamic_debug_module(char *mod_name);
36extern int __dynamic_dbg_enabled_helper(char *modname, int type,
37 int value, int hash);
38
39#define __dynamic_dbg_enabled(module, type, value, level, hash) ({ \
40 int __ret = 0; \
41 if (unlikely((dynamic_printk_enabled & (1LL << DEBUG_HASH)) && \
42 (dynamic_printk_enabled2 & (1LL << DEBUG_HASH2)))) \
43 __ret = __dynamic_dbg_enabled_helper(module, type, \
44 value, hash);\
45 __ret; })
46
47#define dynamic_pr_debug(fmt, ...) do { \
48 static char mod_name[] \
49 __attribute__((section("__verbose_strings"))) \
50 = KBUILD_MODNAME; \
51 static struct mod_debug descriptor \
52 __used \
53 __attribute__((section("__verbose"), aligned(8))) = \
54 { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\
55 if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \
56 0, 0, DEBUG_HASH)) \
57 printk(KERN_DEBUG KBUILD_MODNAME ":" fmt, \
58 ##__VA_ARGS__); \
59 } while (0)
60
61#define dynamic_dev_dbg(dev, format, ...) do { \
62 static char mod_name[] \
63 __attribute__((section("__verbose_strings"))) \
64 = KBUILD_MODNAME; \
65 static struct mod_debug descriptor \
66 __used \
67 __attribute__((section("__verbose"), aligned(8))) = \
68 { mod_name, mod_name, NULL, TYPE_BOOLEAN, DEBUG_HASH, DEBUG_HASH2 };\
69 if (__dynamic_dbg_enabled(KBUILD_MODNAME, TYPE_BOOLEAN, \
70 0, 0, DEBUG_HASH)) \
71 dev_printk(KERN_DEBUG, dev, \
72 KBUILD_MODNAME ": " format, \
73 ##__VA_ARGS__); \
74 } while (0)
75
76#else
77
78static inline int unregister_dynamic_debug_module(const char *mod_name)
79{
80 return 0;
81}
82static inline int __dynamic_dbg_enabled_helper(char *modname, int type,
83 int value, int hash)
84{
85 return 0;
86}
87
88#define __dynamic_dbg_enabled(module, type, value, level, hash) ({ 0; })
89#define dynamic_pr_debug(fmt, ...) do { } while (0)
90#define dynamic_dev_dbg(dev, format, ...) do { } while (0)
91#endif
92
93#endif
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 7fa371898e3..b5496ecbec7 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -16,7 +16,7 @@
16#include <linux/log2.h> 16#include <linux/log2.h>
17#include <linux/typecheck.h> 17#include <linux/typecheck.h>
18#include <linux/ratelimit.h> 18#include <linux/ratelimit.h>
19#include <linux/dynamic_printk.h> 19#include <linux/dynamic_debug.h>
20#include <asm/byteorder.h> 20#include <asm/byteorder.h>
21#include <asm/bug.h> 21#include <asm/bug.h>
22 22
@@ -358,7 +358,7 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
358#if defined(DEBUG) 358#if defined(DEBUG)
359#define pr_debug(fmt, ...) \ 359#define pr_debug(fmt, ...) \
360 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 360 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
361#elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG) 361#elif defined(CONFIG_DYNAMIC_DEBUG)
362#define pr_debug(fmt, ...) do { \ 362#define pr_debug(fmt, ...) do { \
363 dynamic_pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \ 363 dynamic_pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
364 } while (0) 364 } while (0)
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-21 03:30:40 -0400