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Shrink the pre-partition-table part of boot.img by eight bytes.

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* boot/i386/pc/boot.S (ERR): New macro.
(chs_mode): Use ERR.
(geometry_error): Likewise.
(hd_probe_error): Remove.  This is only used once, so we wrwite
it inline instead.
(read_error): Instead of printing read_error_string, just set up
%si and fall through to ...
(error_message): ... this new function, also used by ERR.

	Also-By: Colin Watson <cjwatson@ubuntu.com>
This commit is contained in:
Colin King 2010-03-14 15:47:05 +00:00 committed by Colin Watson
commit 463ac55fac
2 changed files with 20 additions and 12 deletions
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14
ChangeLog
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@ -1,3 +1,17 @@
2010-03-14 Colin King <colin.king@ubuntu.com>
2010-03-14 Colin Watson <cjwatson@ubuntu.com>
Shrink the pre-partition-table part of boot.img by eight bytes.
* boot/i386/pc/boot.S (ERR): New macro.
(chs_mode): Use ERR.
(geometry_error): Likewise.
(hd_probe_error): Remove. This is only used once, so we wrwite
it inline instead.
(read_error): Instead of printing read_error_string, just set up
%si and fall through to ...
(error_message): ... this new function, also used by ERR.
2010-03-14 Colin Watson <cjwatson@ubuntu.com>
Speed up consecutive hostdisk operations on the same device.

18
boot/i386/pc/boot.S
View file

@ -27,6 +27,7 @@
/* Print message string */
#define MSG(x) movw $x, %si; call LOCAL(message)
#define ERR(x) movw $x, %si; jmp LOCAL(error_message)
.file "boot.S"
@ -233,7 +234,7 @@ LOCAL(chs_mode):
jz LOCAL(floppy_probe)
/* Nope, we definitely have a hard disk, and we're screwed. */
jmp LOCAL(hd_probe_error)
ERR(hd_probe_error_string)
LOCAL(final_init):
/* set the mode to zero */
@ -360,22 +361,15 @@ LOCAL(copy_buffer):
* BIOS Geometry translation error (past the end of the disk geometry!).
*/
LOCAL(geometry_error):
MSG(geometry_error_string)
jmp LOCAL(general_error)
/*
* Disk probe failure.
*/
LOCAL(hd_probe_error):
MSG(hd_probe_error_string)
jmp LOCAL(general_error)
ERR(geometry_error_string)
/*
* Read error on the disk.
*/
LOCAL(read_error):
MSG(read_error_string)
movw $read_error_string, %si
LOCAL(error_message):
call LOCAL(message)
LOCAL(general_error):
MSG(general_error_string)