cvs commit: src/sys/compat/ndis pe_var.h subr_pe.c
wpaul at FreeBSD.org
Wed Oct 26 11:46:28 PDT 2005
wpaul 2005-10-26 18:46:27 UTC
FreeBSD src repository
sys/compat/ndis pe_var.h subr_pe.c
Clean up and apply the fix for PR 83477. The calculation for locating
the start of the section headers has to take into account the fact
that the image_nt_header is really variable sized. It happens that
the existing calculation is correct for _most_ production binaries
produced by the Windows DDK, but if we get a binary with oddball
offsets, the PE loader could crash.
Changes from the supplied patch are:
- We don't really need to use the IMAGE_SIZEOF_NT_HEADER() macro when
computing how much of the header to return to callers of
pe_get_optional_header(). While it's important to take the variable
size of the header into account in other calculations, we never
actually look at anything outside the non-variable portion of the
header. This saves callers from having to allocate a variable sized
buffer off the heap (I purposely tried to avoid using malloc()
in subr_pe.c to make it easier to compile in both the -D_KERNEL and
!-D_KERNEL case), and since we're copying into a buffer on the
stack, we always have to copy the same amount of data or else
we'll trash the stack something fierce.
- We need <stddef.h> to get offsetof() in the !-D_KERNEL case.
- ndiscvt.c needs the IMAGE_FIRST_SECTION() macro too, since it does
a little bit of section pre-processing.
Revision Changes Path
1.14 +9 -0 src/sys/compat/ndis/pe_var.h
1.12 +13 -7 src/sys/compat/ndis/subr_pe.c
1.12 +2 -2 src/usr.sbin/ndiscvt/ndiscvt.c
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