diff options
author | Matt Fleming <matt.fleming@linux.intel.com> | 2011-05-25 08:39:47 +0100 |
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committer | Matt Fleming <matt.fleming@linux.intel.com> | 2011-05-25 08:44:48 +0100 |
commit | 565952b9d86d769471d500caab5ebba9bc36c363 (patch) | |
tree | 46ca624afd1d6997d4ebfb91345613b42deb5e70 /com32/elflink/ldlinux/advwrite.c | |
parent | eecc876ef99deb4cf753db5b31d5eb1f83600b6c (diff) | |
download | syslinux-565952b9d86d769471d500caab5ebba9bc36c363.tar.gz syslinux-565952b9d86d769471d500caab5ebba9bc36c363.tar.xz syslinux-565952b9d86d769471d500caab5ebba9bc36c363.zip |
ldlinux: Add support for Auxillary Data Vector
Move all the code for the ADV into ldlinux so that it doesn't have any
dependencies on other modules.
We also need a way to initialize the ADV from ldlinux, so add another
vector to the comboot API.
Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com>
Diffstat (limited to 'com32/elflink/ldlinux/advwrite.c')
-rw-r--r-- | com32/elflink/ldlinux/advwrite.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/com32/elflink/ldlinux/advwrite.c b/com32/elflink/ldlinux/advwrite.c new file mode 100644 index 00000000..4152eea5 --- /dev/null +++ b/com32/elflink/ldlinux/advwrite.c @@ -0,0 +1,45 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2007-2008 H. Peter Anvin - All Rights Reserved + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom + * the Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall + * be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * ----------------------------------------------------------------------- */ + +/* + * syslinux/advwrite.c + * + * Write back the ADV + */ + +#include <syslinux/adv.h> +#include <klibc/compiler.h> +#include <com32.h> + +int syslinux_adv_write(void) +{ + static com32sys_t reg; + + reg.eax.w[0] = 0x001d; + __intcall(0x22, ®, ®); + return (reg.eflags.l & EFLAGS_CF) ? -1 : 0; +} |