| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #undef TRACE_SYSTEM |
| 3 | #define TRACE_SYSTEM printk |
| 4 | |
| 5 | #if !defined(LTTNG_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ) |
| 6 | #define LTTNG_TRACE_PRINTK_H |
| 7 | |
| 8 | #include <probes/lttng-tracepoint-event.h> |
| 9 | #include <linux/version.h> |
| 10 | |
| 11 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)) |
| 12 | |
| 13 | LTTNG_TRACEPOINT_EVENT_MAP(console, |
| 14 | |
| 15 | printk_console, |
| 16 | |
| 17 | TP_PROTO(const char *text, size_t len), |
| 18 | |
| 19 | TP_ARGS(text, len), |
| 20 | |
| 21 | TP_FIELDS( |
| 22 | ctf_sequence_text(char, msg, text, size_t, len) |
| 23 | ) |
| 24 | ) |
| 25 | |
| 26 | #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0)) |
| 27 | |
| 28 | LTTNG_TRACEPOINT_EVENT_MAP(console, |
| 29 | |
| 30 | printk_console, |
| 31 | |
| 32 | TP_PROTO(const char *log_buf, unsigned start, unsigned end, |
| 33 | unsigned log_buf_len), |
| 34 | |
| 35 | TP_ARGS(log_buf, start, end, log_buf_len), |
| 36 | |
| 37 | TP_FIELDS( |
| 38 | ctf_sequence_text(char, msg, log_buf + start, |
| 39 | size_t, end - start) |
| 40 | ) |
| 41 | ) |
| 42 | |
| 43 | #else /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0)) */ |
| 44 | |
| 45 | LTTNG_TRACEPOINT_EVENT_MAP(console, |
| 46 | |
| 47 | printk_console, |
| 48 | |
| 49 | TP_PROTO(const char *log_buf, unsigned start, unsigned end, |
| 50 | unsigned log_buf_len), |
| 51 | |
| 52 | TP_ARGS(log_buf, start, end, log_buf_len), |
| 53 | |
| 54 | TP_FIELDS( |
| 55 | /* |
| 56 | * printk buffer is gathered from two segments on older kernels. |
| 57 | */ |
| 58 | ctf_sequence_text(char, msg1, |
| 59 | log_buf + (start & (log_buf_len - 1)), |
| 60 | size_t, (start & (log_buf_len - 1)) > (end & (log_buf_len - 1)) |
| 61 | ? log_buf_len - (start & (log_buf_len - 1)) |
| 62 | : end - start) |
| 63 | ctf_sequence_text(char, msg2, |
| 64 | log_buf, |
| 65 | size_t, (start & (log_buf_len - 1)) > (end & (log_buf_len - 1)) |
| 66 | ? end & (log_buf_len - 1) |
| 67 | : 0) |
| 68 | ) |
| 69 | ) |
| 70 | |
| 71 | #endif |
| 72 | |
| 73 | #endif /* LTTNG_TRACE_PRINTK_H */ |
| 74 | |
| 75 | /* This part must be outside protection */ |
| 76 | #include <probes/define_trace.h> |