diff options
Diffstat (limited to 'src/lib/cbmem_console.c')
| -rw-r--r-- | src/lib/cbmem_console.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/src/lib/cbmem_console.c b/src/lib/cbmem_console.c index dd883008bf..ac1d8bbd7e 100644 --- a/src/lib/cbmem_console.c +++ b/src/lib/cbmem_console.c @@ -113,27 +113,39 @@ void cbmemc_tx_byte(unsigned char data) */ static void copy_console_buffer(struct cbmem_console *new_cons_p) { - u32 copy_size; + u32 copy_size, dropped_chars; u32 cursor = new_cons_p->buffer_cursor; struct cbmem_console *old_cons_p; - int overflow; old_cons_p = current_console(); - overflow = old_cons_p->buffer_cursor > old_cons_p->buffer_size; + if (old_cons_p->buffer_cursor < old_cons_p->buffer_size) + copy_size = old_cons_p->buffer_cursor; + else + copy_size = old_cons_p->buffer_size; - copy_size = overflow ? - old_cons_p->buffer_size : old_cons_p->buffer_cursor; + if (cursor > new_cons_p->buffer_size) + copy_size = 0; + else if (cursor + copy_size > new_cons_p->buffer_size) + copy_size = new_cons_p->buffer_size - cursor; + + dropped_chars = old_cons_p->buffer_cursor - copy_size; + if (dropped_chars) { + /* Reserve 80 chars to report overflow, if possible. */ + if (copy_size < 80) + return; + copy_size -= 80; + dropped_chars += 80; + } memcpy(new_cons_p->buffer_body + cursor, old_cons_p->buffer_body, copy_size); cursor += copy_size; - if (overflow) { + if (dropped_chars) { const char loss_str1[] = "\n\n*** Log truncated, "; const char loss_str2[] = " characters dropped. ***\n\n"; - u32 dropped_chars = old_cons_p->buffer_cursor - copy_size; /* * When running from ROM sprintf is not available, a simple |