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We already require -std=gnu99 and old-style function definitions might
hide some compiler warnings.
Signed-off-by: Mark Wielaard <[email protected]>
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dwarf_formudata can return an error for bad DWARF. Don't ignore it.
Signed-off-by: Mark Wielaard <[email protected]>
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In theory user defined debug macros can have an arbitrary number of
arguments. Don't allocate them all on stack. If there are more than
8 (arbitrary number, but no sane macro should have more arguments),
then dynamically allocate and free the attributes.
Found by gcc -fsanitize=undefined. Which pointed out the nforms could
be zero, creating an empty vla (which could cause undefined behavior).
Signed-off-by: Mark Wielaard <[email protected]>
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Both get_uleb128 and get_sleb128 now take an end pointer to prevent
reading too much data. Adjust all callers to provide the end pointer.
There are still two exceptions. "Raw" dwarf_getabbrevattr and
read_encoded_valued don't have a end pointer associated yet.
They will have to be provided in the future.
Signed-off-by: Mark Wielaard <[email protected]>
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All attributes now have a reference to a (fake) CU that has startp and
endp set to the data section where the form data comes from. Use that
for bounds checking in __libdw_form_val_len and dwarf_formblock to make
sure data read doesn't overflow any data section. Remove libdwP.h cu_data
and use cu startp and endp directly where appropriate.
Signed-off-by: Mark Wielaard <[email protected]>
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Pass endp as argument to __libdw_form_val_len and check we don't read
beyond the end of expected data and don't return lengths that would
overflow.
Signed-off-by: Mark Wielaard <[email protected]>
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We now require callers to pass DWARF_GETMACROS_START to start the
iteration. 0 is still accepted, but signals to libdw that the
iteration request comes from an old-style caller, and that opcode 0xff
should be rejected when iterating .debug_macro, to avoid confusion.
Signed-off-by: Petr Machata <[email protected]>
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- This code is based on the following proposal:
http://www.dwarfstd.org/ShowIssue.php?issue=110722.1
- dwarf_getmacros serves either of .debug_macinfo or .debug_macro
transparently, but if the latter uses opcode 0xff, it bails out with
an error. The reason is that in .debug_macro, 0xff is a custom code
that can mean anything, while in .debug_macinfo there's fixed
semantics associated with 0xff.
- dwarf_getmacros_off is a new interface used for requesting iteration
through transparently included units.
- dwarf_macro_getparamcnt and dwarf_macro_param are new interfaces
used for requesting number of parameters of an opcode and individual
parameters. dwarf_macro_getsrcfiles is a new interface used for
requesting a file part of .debug_line unit associated with macro
unit that the opcode comes from.
- The existing interfaces dwarf_macro_opcode, dwarf_macro_param1 and
dwarf_macro_param2 remain operational for old- as well as new-style
Dwarf macro sections, if applicable.
- dwarf_getsrclines was made into a light wrapper around a worker
function that loads line unit given its offset. The worker also
caches loaded units in an offset-keyed search tree, so that we don't
end up re-reading units even though they were read in a different
domain (e.g. a macro unit request can prime cache for later CU
lookup). dwarf_macro_getsrcfiles calls the worker function under
covers.
Signed-off-by: Petr Machata <[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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4f8fc821345feef58624f0aa5b470d4827577d8c)
to branch 'com.redhat.elfutils' (head 76e26cb54695fd3b21ee8fb5be3036bd68200633)
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