29 #include <string.h>
44     uint32_t magic;  member
54     uint32_t magic;  member
71     DEBUG_ASSERT(klog_buf->magic == KLOG_BUFFER_HEADER_MAGIC);  in find_nth_log()
72     DEBUG_ASSERT(log < klog_buf->log_count);  in find_nth_log()
76         DEBUG_ASSERT(k->magic == KLOG_HEADER_MAGIC);  in find_nth_log()
78         uint8_t *ptr = (uint8_t *)k->data;  in find_nth_log()
79         ptr += k->size;  in find_nth_log()
82         log--;  in find_nth_log()
91     DEBUG_ASSERT(kb->magic == KLOG_BUFFER_HEADER_MAGIC);  in get_checksum_klog_buffer_header()
93     return crc32(0, (const void *)(&kb->header_crc32 + 1), sizeof(*kb) - 8);  in get_checksum_klog_buffer_header()
99     DEBUG_ASSERT(k->magic == KLOG_HEADER_MAGIC);  in get_checksum_klog_data()
102     for (uint i = 0; i < k->size; i++) {  in get_checksum_klog_data()
103         sum += k->data[i];  in get_checksum_klog_data()
112     DEBUG_ASSERT(kb->magic == KLOG_BUFFER_HEADER_MAGIC);  in checksum_klog_buffer_header()
114     kb->header_crc32 = get_checksum_klog_buffer_header(kb);  in checksum_klog_buffer_header()
120     DEBUG_ASSERT(k->magic == KLOG_HEADER_MAGIC);  in checksum_klog_data()
122     k->data_checksum = get_checksum_klog_data(k);  in checksum_klog_data()
146     klog_buf->magic = KLOG_BUFFER_HEADER_MAGIC;  in klog_create()
147     klog_buf->log_count = count;  in klog_create()
148     klog_buf->current_log = 0;  in klog_create()
149     klog_buf->total_size = len;  in klog_create()
154     uint bufsize = len - sizeof(struct klog_buffer_header) - sizeof(struct klog_header) * count;  in klog_create()
159         klog->magic = KLOG_HEADER_MAGIC;  in klog_create()
160         klog->size = bufsize;  in klog_create()
161         klog->head = 0;  in klog_create()
162         klog->tail = 0;  in klog_create()
163         klog->data_checksum = 0;  in klog_create()
167         count--;  in klog_create()
188     if (kbuf->magic != KLOG_BUFFER_HEADER_MAGIC)  in klog_recover()
191     if (crc != kbuf->header_crc32)  in klog_recover()
195     if (kbuf->total_size > MAX_KLOG_SIZE)  in klog_recover()
197     if (kbuf->current_log >= kbuf->log_count)  in klog_recover()
202     for (uint i = 0; i < kbuf->log_count; i++) {  in klog_recover()
206         if (k->magic != KLOG_HEADER_MAGIC)  in klog_recover()
210         if ((k->size > 0) && (k->size & 3))  in klog_recover()
212         if (k->size > MAX_KLOG_SIZE)  in klog_recover()
214         if (k->head >= k->size)  in klog_recover()
216         if (k->tail >= k->size)  in klog_recover()
220         if (k->data_checksum) {  in klog_recover()
222             if (crc != k->data_checksum)  in klog_recover()
226         ptr += sizeof(struct klog_header) + k->size;  in klog_recover()
231     klog_set_current_buffer(klog_buf->current_log);  in klog_recover()
234             klog_buf, klog_buf->current_log, klog, klog->head, klog->tail, klog->size);  in klog_recover()
245     DEBUG_ASSERT(klog_buf->magic == KLOG_BUFFER_HEADER_MAGIC);  in klog_buffer_count()
247     return klog_buf->log_count;  in klog_buffer_count()
256     DEBUG_ASSERT(klog_buf->magic == KLOG_BUFFER_HEADER_MAGIC);  in klog_current_buffer()
258     return klog_buf->current_log;  in klog_current_buffer()
267     DEBUG_ASSERT(klog_buf->magic == KLOG_BUFFER_HEADER_MAGIC);  in klog_set_current_buffer()
269     if (buffer >= klog_buf->log_count)  in klog_set_current_buffer()
276     if (buffer != klog_buf->current_log) {  in klog_set_current_buffer()
277         klog_buf->current_log = buffer;  in klog_set_current_buffer()
294     DEBUG_ASSERT(klog->magic == KLOG_HEADER_MAGIC);  in klog_read()
307     len -= tmp_len;  in klog_read()
316     klog->tail += offset;  in klog_read()
317     if (klog->tail >= klog->size)  in klog_read()
318         klog->tail -= klog->size;  in klog_read()
333     return klog_getc(-1);  in klog_getchar()
341     return (klog->head != klog->tail);  in klog_has_data()
349     DEBUG_ASSERT(klog->magic == KLOG_HEADER_MAGIC);  in klog_puts_len()
351     LTRACEF("before write head %u tail %u size %u\n", klog->head, klog->tail, klog->size);  in klog_puts_len()
356         deltasum += *str - klog->data[klog->head];  in klog_puts_len()
359         klog->data[klog->head] = *str;  in klog_puts_len()
362         uint newhead = klog->head + 1;  in klog_puts_len()
363         if (newhead >= klog->size)  in klog_puts_len()
364             newhead -= klog->size;  in klog_puts_len()
365         DEBUG_ASSERT(newhead < klog->size);  in klog_puts_len()
368         if (klog->tail == newhead) {  in klog_puts_len()
369             uint newtail = klog->tail + 1;  in klog_puts_len()
370             if (newtail >= klog->size)  in klog_puts_len()
371                 newtail -= klog->size;  in klog_puts_len()
372             DEBUG_ASSERT(newtail < klog->size);  in klog_puts_len()
373             klog->tail = newtail;  in klog_puts_len()
377         klog->head = newhead;  in klog_puts_len()
382     LTRACEF("after write head %u tail %u\n", klog->head, klog->tail);  in klog_puts_len()
384     klog->data_checksum += deltasum;  in klog_puts_len()
434     if (buffer >= 0 && (uint)buffer >= klog_buf->log_count)  in klog_get_buffer()
444     DEBUG_ASSERT(k->magic == KLOG_HEADER_MAGIC);  in klog_get_buffer()
446     vec[0].iov_base = &k->data[k->tail];  in klog_get_buffer()
447     if (k->head == k->tail) {  in klog_get_buffer()
449     } else if (k->head > k->tail) {  in klog_get_buffer()
451         vec[0].iov_len = k->head - k->tail;  in klog_get_buffer()
455         vec[0].iov_len = k->size - k->tail;  in klog_get_buffer()
458         vec[1].iov_base = &k->data[0];  in klog_get_buffer()
459         vec[1].iov_len = k->head;  in klog_get_buffer()
509         printf("usage: %s puts <string>\n", argv[0].str);  in cmd_klog()
514         return -1;  in cmd_klog()
526             return -1;  in cmd_klog()
563             return -1;  in cmd_klog()
581         klog_printf("a plain string\n");  in cmd_klog()
583         klog_printf("strings: '%s' '%s'\n", "a little string", "another one");  in cmd_klog()
585         int buffer = -1;  in cmd_klog()
592         int buffer = -1;  in cmd_klog()