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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6588 | serge | 1 | #ifndef _DYNAMIC_DEBUG_H |
| 2 | #define _DYNAMIC_DEBUG_H |
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| 3 | |||
| 4 | /* |
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| 5 | * An instance of this structure is created in a special |
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| 6 | * ELF section at every dynamic debug callsite. At runtime, |
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| 7 | * the special section is treated as an array of these. |
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| 8 | */ |
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| 9 | struct _ddebug { |
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| 10 | /* |
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| 11 | * These fields are used to drive the user interface |
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| 12 | * for selecting and displaying debug callsites. |
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| 13 | */ |
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| 14 | const char *modname; |
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| 15 | const char *function; |
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| 16 | const char *filename; |
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| 17 | const char *format; |
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| 18 | unsigned int lineno:18; |
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| 19 | /* |
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| 20 | * The flags field controls the behaviour at the callsite. |
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| 21 | * The bits here are changed dynamically when the user |
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| 22 | * writes commands to |
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| 23 | */ |
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| 24 | #define _DPRINTK_FLAGS_NONE 0 |
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| 25 | #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ |
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| 26 | #define _DPRINTK_FLAGS_INCL_MODNAME (1<<1) |
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| 27 | #define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2) |
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| 28 | #define _DPRINTK_FLAGS_INCL_LINENO (1<<3) |
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| 29 | #define _DPRINTK_FLAGS_INCL_TID (1<<4) |
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| 30 | #if defined DEBUG |
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| 31 | #define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT |
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| 32 | #else |
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| 33 | #define _DPRINTK_FLAGS_DEFAULT 0 |
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| 34 | #endif |
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| 35 | unsigned int flags:8; |
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| 36 | } __attribute__((aligned(8))); |
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| 37 | |||
| 38 | |||
| 39 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, |
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| 40 | const char *modname); |
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| 41 | |||
| 42 | #if defined(CONFIG_DYNAMIC_DEBUG) |
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| 43 | extern int ddebug_remove_module(const char *mod_name); |
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| 44 | extern __printf(2, 3) |
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| 45 | void __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...); |
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| 46 | |||
| 47 | extern int ddebug_dyndbg_module_param_cb(char *param, char *val, |
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| 48 | const char *modname); |
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| 49 | |||
| 50 | struct device; |
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| 51 | |||
| 52 | extern __printf(3, 4) |
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| 53 | void __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev, |
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| 54 | const char *fmt, ...); |
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| 55 | |||
| 56 | struct net_device; |
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| 57 | |||
| 58 | extern __printf(3, 4) |
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| 59 | void __dynamic_netdev_dbg(struct _ddebug *descriptor, |
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| 60 | const struct net_device *dev, |
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| 61 | const char *fmt, ...); |
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| 62 | |||
| 63 | #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ |
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| 64 | static struct _ddebug __aligned(8) \ |
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| 65 | __attribute__((section("__verbose"))) name = { \ |
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| 66 | .modname = KBUILD_MODNAME, \ |
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| 67 | .function = __func__, \ |
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| 68 | .filename = __FILE__, \ |
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| 69 | .format = (fmt), \ |
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| 70 | .lineno = __LINE__, \ |
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| 71 | .flags = _DPRINTK_FLAGS_DEFAULT, \ |
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| 72 | } |
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| 73 | |||
| 74 | #define dynamic_pr_debug(fmt, ...) \ |
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| 75 | do { \ |
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| 76 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
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| 77 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
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| 78 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ |
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| 79 | ##__VA_ARGS__); \ |
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| 80 | } while (0) |
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| 81 | |||
| 82 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
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| 83 | do { \ |
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| 84 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
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| 85 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
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| 86 | __dynamic_dev_dbg(&descriptor, dev, fmt, \ |
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| 87 | ##__VA_ARGS__); \ |
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| 88 | } while (0) |
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| 89 | |||
| 90 | #define dynamic_netdev_dbg(dev, fmt, ...) \ |
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| 91 | do { \ |
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| 92 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
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| 93 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
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| 94 | __dynamic_netdev_dbg(&descriptor, dev, fmt, \ |
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| 95 | ##__VA_ARGS__); \ |
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| 96 | } while (0) |
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| 97 | |||
| 98 | #define dynamic_hex_dump(prefix_str, prefix_type, rowsize, \ |
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| 99 | groupsize, buf, len, ascii) \ |
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| 100 | do { \ |
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| 101 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, \ |
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| 102 | __builtin_constant_p(prefix_str) ? prefix_str : "hexdump");\ |
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| 103 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
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| 104 | print_hex_dump(KERN_DEBUG, prefix_str, \ |
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| 105 | prefix_type, rowsize, groupsize, \ |
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| 106 | buf, len, ascii); \ |
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| 107 | } while (0) |
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| 108 | |||
| 109 | #else |
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| 110 | |||
| 111 | #include |
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| 112 | #include |
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| 113 | |||
| 114 | static inline int ddebug_remove_module(const char *mod) |
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| 115 | { |
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| 116 | return 0; |
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| 117 | } |
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| 118 | |||
| 119 | static inline int ddebug_dyndbg_module_param_cb(char *param, char *val, |
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| 120 | const char *modname) |
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| 121 | { |
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| 122 | if (strstr(param, "dyndbg")) { |
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| 123 | /* avoid pr_warn(), which wants pr_fmt() fully defined */ |
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| 124 | printk(KERN_WARNING "dyndbg param is supported only in " |
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| 125 | "CONFIG_DYNAMIC_DEBUG builds\n"); |
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| 126 | return 0; /* allow and ignore */ |
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| 127 | } |
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| 128 | return -EINVAL; |
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| 129 | } |
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| 130 | |||
| 131 | #define dynamic_pr_debug(fmt, ...) \ |
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| 132 | do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) |
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| 133 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
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| 134 | do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) |
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| 135 | #endif |
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| 136 | |||
| 137 | #endif |