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There are two places, dwfl_segment_report_module and elf_from_remote_memory
in libdwfl where we use the Ehdr e_shnum directly. Document why this is fine.
Getting the shdrs in those two places is really just a nice bonus and if there
are more than 0xff00 then it is unlikely we will get them all anyway.
Signed-off-by: Mark Wielaard <[email protected]>
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Some compilers implicitly cast the result of uint_fast16_t *
uint_fast16_t to something signed and then complain about the
comparison to (unsigned) size_t.
Casting phnum to size_t is a good idea anyway as 16bit multiplication
can easily overflow and we are not checking for this.
Signed-off-by: Ulf Hermann <[email protected]>
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Signed-off-by: Mark Wielaard <[email protected]>
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Prepare to compile with clang.
A union like
{ T32 a32[n]; T64 a64[n]; } u;
is expanded to
size_t nbytes = n * MAX(sizeof(T32), sizeof(T64));
void *data = malloc(nbytes);
T32 (*a32)[n] = data;
T64 (*a64)[n] = data;
Signed-off-by: Chih-Hung Hsieh <[email protected]>
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Signed-off-by: Mark Wielaard <[email protected]>
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In commit f15bcd "elf_from_remote_memory should use pagesize, not p_align"
we already relaxed the p_align sanity check to allow alignment of the
segment against the pagesize since that is what the glibc dynamic linker
actually does. But on some architectures the kernel inserts a vdso with
a completely bogus p_align for some PT_LOAD segments. So just drop the
whole sanity check and allow anything since we won't use p_align, but
always already use pagesize anyway.
Signed-off-by: Mark Wielaard <[email protected]>
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If the last PT_LOAD segment that contains the whole shdrs also extends
the segment in memory beyond the end of file the program might be reusing
the memory space that we expect the shdrs to be in. Don't trust the shdrs
are valid in that case.
Signed-off-by: Mark Wielaard <[email protected]>
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elf_from_remote_memory would use the actual p_align of the PT_LOAD segments
to calculate the loadbase, end and start of a segment. But the dynamic
loader aligns the segments using the pagesize and only sanity checks the
p_align values. So we should do the same to get accurate segment addresses.
Also fixes a small memory leak in case the ELF image appears to be bad.
Signed-off-by: Mark Wielaard <[email protected]>
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There was a type in the case of parsing ELFCLASS64 phdrs. Check against
p64 p_type, not the p32 p_type which at a different location in the union.
Signed-off-by: Mark Wielaard <[email protected]>
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* Change name from "Red Hat elfutils" to "elfutils".
* Update license of standalone tools and test from GPLv2 to GPLv3+.
* Change license of libraries from GPLv2+exception to GPLv2/LGPLv3+.
* Add Developer Certificate of Origin based contributor policy.
top-level:
- COPYING: Upgraded from GPLv2 to GPLv3.
- CONTRIBUTING, COPYING-GPLv2, COPYING-LGPLv3: New files.
- NEWS: Added note about new contribution and license policy.
- Makefile.am: Updated to GPLv3, added new files to EXTRA_DIST.
- configure.ac: Update to GPLv3, changed AC_INIT name to 'elfutils'.
backends, lib, libasm, libcpu, libdw, libdwfl, libebl, libelf:
- All files updated to GPLv2/LGPLv3+. Except some very small files
(<5 lines) which didn't have any headers at all before, the linker
.maps files and the libcpu/defs files which only contain data and
libelf/elf.h which comes from glibc and is under LGPLv2+.
config:
- elfutils.spec.in: Add new License: headers and new %doc files.
- Update all license headers to GPLv2/LGPLv3+ for files used by libs.
src, tests:
- All files updated to GPLv3+. Except for the test bz2 data files, the
linker maps and script files and some very small files (<5 lines)
that don't have any headers.
Signed-off-by: Richard Fontana <[email protected]>
Signed-off-by: Mark Wielaard <[email protected]>
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e0c7abd450c9e49093cfae30af8a22782a74a403)
to branch 'com.redhat.elfutils' (head 2c784d50eee72e33972c333138a3a28df304da63)
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and c4704f02db5f42d7bcdb2feafc6199d7ac132da3
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* elf-from-memory.c (elf_from_remote_memory): Fix 32/64 typo.
Use __libdwfl_seterrno for elf_memory failure.
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4f8fc821345feef58624f0aa5b470d4827577d8c)
to branch 'com.redhat.elfutils' (head 76e26cb54695fd3b21ee8fb5be3036bd68200633)
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