diff options
| author | smiles@google.com <smiles@google.com@ca484b36-2546-0410-af21-7957cbf944c2> | 2009-11-13 00:21:26 +0000 |
|---|---|---|
| committer | smiles@google.com <smiles@google.com@ca484b36-2546-0410-af21-7957cbf944c2> | 2009-11-13 00:21:26 +0000 |
| commit | 8eb5346034c7dbd15694d59d7e1db2eec8a689f9 (patch) | |
| tree | 3bb381dfe914f85b155671ddf3328a3be712282f | |
| parent | 920f770ac1285d99d1fde703fd1f22355e8114a8 (diff) | |
| download | qemu-sgabios-8eb5346034c7dbd15694d59d7e1db2eec8a689f9.tar.gz | |
Merged the following bug fixes from the smiles branch...
* Fixed bug in write_string procedure which resulted in the DS register
being clobbered.
* Fixed bug in write_string which would result in 64kb of garbage being
written to the serial port if cx (number of characters to write) was 0.
git-svn-id: http://sgabios.googlecode.com/svn/trunk@7 ca484b36-2546-0410-af21-7957cbf944c2
| -rw-r--r-- | sgabios.S | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -1735,6 +1735,7 @@ write_char_tail: */ write_string: call set_cursor_position + pushw %ds pushw %es pushw %es popw %ds /* ds = es */ @@ -1742,7 +1743,10 @@ write_string: testb $2, %al jnz write_attr_string call send_attribute /* send attribute in %bl */ + test %cx, %cx + jz write_string_empty call send_string /* plaintext out */ +write_string_empty: jmp write_string_update_cursor write_attr_string: call send_attr_string /* text+attrib out */ @@ -1753,6 +1757,7 @@ write_string_update_cursor: call set_cursor_position write_string_tail: popw %es + popw %ds ret /* |