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| author | Michael Brown | 2012-01-18 01:02:16 +0100 |
|---|---|---|
| committer | Michael Brown | 2012-01-18 01:02:16 +0100 |
| commit | f5bbe7ec4a4b31ad197947b025c54a8e87402436 (patch) | |
| tree | b3d902ef93ee3e72210c50d4ca7f682ba14ba6a9 /src/arch/i386/core/runtime.c | |
| parent | [test] Add self-tests for SHA-1 algorithm (diff) | |
| download | ipxe-f5bbe7ec4a4b31ad197947b025c54a8e87402436.tar.gz ipxe-f5bbe7ec4a4b31ad197947b025c54a8e87402436.tar.xz ipxe-f5bbe7ec4a4b31ad197947b025c54a8e87402436.zip | |
[lkrnprefix] Copy command line before installing iPXE
The command line may be situated in an area of base memory that will
be overwritten by iPXE's real-mode segments, causing the command line
to be corrupted before it can be used.
Fix by creating a copy of the command line on the prefix stack (below
0x7c00) before installing the real-mode segments.
Reported-by: Dave Hansen <dave@sr71.net>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/arch/i386/core/runtime.c')
| -rw-r--r-- | src/arch/i386/core/runtime.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/arch/i386/core/runtime.c b/src/arch/i386/core/runtime.c index 09ba6256..2ad8c20a 100644 --- a/src/arch/i386/core/runtime.c +++ b/src/arch/i386/core/runtime.c @@ -132,7 +132,8 @@ static int cmdline_init ( void ) { } cmdline = cmdline_copy; copy_from_user ( cmdline, cmdline_user, 0, len ); - DBGC ( colour, "RUNTIME found command line \"%s\"\n", cmdline ); + DBGC ( colour, "RUNTIME found command line \"%s\" at %08x\n", + cmdline, cmdline_phys ); /* Strip unwanted cruft from the command line */ cmdline_strip ( cmdline, "BOOT_IMAGE=" ); |