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| author | H. Peter Anvin <hpa@zytor.com> | 2009-04-04 15:55:26 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-04-04 15:55:26 -0700 |
| commit | 248011cda22da250b4e506ed72270a292fa7efde (patch) | |
| tree | c3af733e113c1087a967d2ffe71d7685b7609ca9 | |
| parent | 5ec84eb68a72803ca7d7b459f49fbd8df58007f6 (diff) | |
| download | syslinux.git-248011cda22da250b4e506ed72270a292fa7efde.tar.gz syslinux.git-248011cda22da250b4e506ed72270a292fa7efde.tar.xz syslinux.git-248011cda22da250b4e506ed72270a292fa7efde.zip | |
memscan: protect 0-0x7c00 until the new shuffler is merged
Mark the memory range 0-0x7c00 unavailable until the new shuffler code
is ready, at which point we can go for a tighter bound.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | com32/lib/syslinux/memscan.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/com32/lib/syslinux/memscan.c b/com32/lib/syslinux/memscan.c index 69f8a189..d7541284 100644 --- a/com32/lib/syslinux/memscan.c +++ b/com32/lib/syslinux/memscan.c @@ -59,9 +59,9 @@ int syslinux_scan_memory(scan_memory_callback_t callback, void *data) /* Use INT 12h to get DOS memory above 0x7c00 */ __intcall(0x12, &zireg, &oreg); - if (oreg.eax.w[0] > 2 && oreg.eax.w[0] <= 640) { - addr_t dosmem = (oreg.eax.w[0] << 10) - 0x504; - rv = callback(data, 0x504, dosmem, true); + if (oreg.eax.w[0] >= 32 && oreg.eax.w[0] <= 640) { + addr_t dosmem = (oreg.eax.w[0] << 10) - 0x7c00; + rv = callback(data, 0x7c00, dosmem, true); if (rv) return rv; } |