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The Git repository of the Libabigail Project
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Control-Flow-Integrity (CFI) when enabled in clang built binaries introduces an indirection when looking up ELF symbols. For DSO, the symbol table (.dynsym) will still contain the symbols, but additional symbols with suffix .cfi will be added to the full .symtab. Unfortunately, the DWARF debug information refers to CFI symbols by address to the .cfi suffixed variants as they point to the actual implementation. When the dwarf reader is determining whether to suppress variable or function declarations, it does so by identifying if there is an associated ELF symbol at the given address read from DWARF. Unless we know about the alternative address, this will fail and the type information will be suppressed. Hence add the .cfi symbol values to the lookup map to associate their address with the corresponding publicly exported symbol. * src/abg-symtab-reader.cc (symtab::load_): use new add_alternative_address_lookups method. (add_alternative_address_lookups): New method. * src/abg-symtab-reader.h (add_alternative_address_lookups): new function declaration. * tests/data/test-read-dwarf/test-libaaudio.so: New test data. * tests/data/test-read-dwarf/test-libaaudio.so.abi: New test data. * tests/data/Makefile.am: Add the two new tests input to source distribution. * tests/test-read-dwarf.cc: New test case. Reported-by: Dan Albert <danalbert@google.com> Reviewed-by: Giuliano Procida <gprocida@google.com> Signed-off-by: Matthias Maennich <maennich@google.com> Signed-off-by: Dodji Seketeli <dodji@redhat.com> |
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| autoconf-archive | ||
| bash-completion | ||
| doc | ||
| include | ||
| m4 | ||
| relicensing-scripts | ||
| scripts | ||
| src | ||
| tests | ||
| tools | ||
| .clang-format | ||
| .gitignore | ||
| abigail.m4 | ||
| AUTHORS | ||
| ChangeLog | ||
| COMMIT-LOG-GUIDELINES | ||
| COMPILING | ||
| configure.ac | ||
| CONTRIBUTING | ||
| default.abignore | ||
| gen-changelog.py | ||
| install-sh | ||
| libabigail.pc.in | ||
| license-change-2020.txt | ||
| LICENSE.txt | ||
| ltmain.sh | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
| release-text-template.txt | ||
| update-copyright.sh | ||
| VISIBILITY | ||
This is the Application Binary Interface Generic Analysis and Instrumentation Library. It aims at constructing, manipulating, serializing and de-serializing ABI-relevant artifacts. The set of artifacts that we are intersted is made of quantities like types, variable, fonctions and declarations of a given library or program. For a given library or program this set of quantities is called an ABI corpus. This library aims at (among other things) providing a way to compare two ABI Corpora (apparently the plural of corpus is copora, heh, that's cool), provide detailed information about their differences, and help build tools to infer interesting conclusions about these differences. You are welcome to contribute to this project after reading the files CONTRIBUTING and COMMIT-LOG-GUIDELINES files in the source tree. Communicating with the maintainers of this project -- including sending patches to be include to the source code -- happens via email at libabigail@sourceware.org.