Apparently, commit 2f02e81510 that removed
$(EXEEXT) suffix from shared libraries was incomplete: it missed the
fact that some libraries were included into noinst_PROGRAMS, resulting
to the following automake warnings:
libasm/Makefile.am:66: warning: deprecated feature: target 'libasm.so' overrides 'libasm.so$(EXEEXT)'
libdw/Makefile.am:114: warning: deprecated feature: target 'libdw.so' overrides 'libdw.so$(EXEEXT)'
libelf/Makefile.am:116: warning: deprecated feature: target 'libelf.so' overrides 'libelf.so$(EXEEXT)'
Fix this by renaming noinst_PROGRAMS to noinst_DATA and removing no
longer needed lib{asm,dw,elf}_so_SOURCES variables and add lib{asm,dw,elf).so
to CLEANFILES.
Fixes: 2f02e81510 ("Drop $(EXEEXT) suffix from shared libraries")
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Mark Wielaard <mark@klomp.org>
We explicitly test (with system-elf-libelf) that our include headers
work with the system elf.h header. But it might be helpful to install
the elf.h file for a private install. Our elf.h header really is just
a copy of the latest glibc elf.h. But it might be newer and include
more constants than the system installed elf.h.
Add a new configure option --enable-install-elfh to install elf.h.
But warn when it is enabled for the default /usr or /usr/local prefix
because it might clash with the glibc/system elf.h header in that case.
Signed-off-by: Mark Wielaard <mark@klomp.org>
Those flags are not available on all platforms, and omitting them when
not available will not cause any harm. In particular:
-z,defs disallows undefined symbols in object files. This option is
unsupported if the target binary format enforces the same condition
already. Furthermore it is only a compile time sanity check. When it is
omitted, the same binary is produced.
-z,relro instructs the loader to mark sections read-only after loading
the library, where possible. This is a hardening mechanism. If it is
unavailable, the functionality of the code is not affected in any way.
-fPIC instructs the compiler to produce position independent code. While
this is preferable to relocatable code, relocatable code also works and
may even be faster. Relocatable code might just be loaded into memory
multiple times for different processes.
-fPIE is the same thing as -fPIC for executables rather than shared
libraries.
Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
Link them all with -z,defs,-z,relro,--no-undefined, provide complete
dependencies for the link steps, and add libeu.a to each one. libeu.a
contains useful library functionality that each of them might use. The
linker will strip unneeded symbols, so linking it in won't hurt even if
none of the functions are used.
Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
Elf_Data of a compressed section has type ELF_T_CHDR. This type can be
xlated to the file or memory representation. This will make sure the Chdr
is in the correct endianess. The compressed data following the Chdr isn't
translated.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Note, elfutils does not explicitly enable AM_SILENT_RULES. It's only
available starting from automake 1.11, but starting from automake 1.13
silent rules are always generated, defaulting to verbose. $(AM_V_foo)
additions should be no-ops on systems that don't support silent rules.
To be silent, use "./configure --enable-silent-rules" or "make V=0".
Signed-off-by: Josh Stone <jistone@redhat.com>
This avoids relocation overflows in sparc/sparc64 targets while
linking, where the reachable data using -fpic is only 4kb.
Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
The commands to check for invalid text relocations in the generated DSOs
shouldn't be displayed. They contain an echo which prints the text.
This patch suppresses the commands from being printed.
Using american fuzzy lop has found a lot of issues. It would be nice to
make using it a bit easier. Our build files make sure that no shared
library uses text relocations, but afl-gcc will insert some on i686.
http://www.akkadia.org/drepper/textrelocs.html
Now CC=afl-gcc ./configure --disable-textrelcheck will allow them so
that afl can instrument the libraries.
Don't try to use or install them except with afl-fuzz. When selinux is
enabled it might prevent loading the libraries with DT_TEXTREL set.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
The --enable-mudflap configure build has been broken for 2 years without
anybody apparently noticing. GCC 4.9 removed mudflap support. Before
release we now run make distcheck with valgrind support. Removal of the
mudflap configure option simplifies the build a little.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Sometimes with cross-compile toolchains, the tools are prefixed with the
target arch. Using AC_CHECK_TOOL looks for tools named like this.
Signed-off-by: Michael Forney <mforney@mforney.org>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
* 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 <rfontana@redhat.com>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Sun in their implementation messed up the semantics of these functions.
To get back to source code compatibility they asked for a solution.
We simply add aliases for the two affected functions, named
elf_getshdrnum and elf_getshdrstrndx. The semantics remains the
same. Users of the old interfaces receive a warning for now. In
future we might make it impossible to link programs which request
the old interfaces (binary compatibility will of course be maintained).
2007-10-04 Roland McGrath <roland@redhat.com>
* readelf.c (print_archive_index): New variable.
(options, parse_opt): Accept -c/--archive-index to set it.
(dump_archive_index): New function.
(process_file): Take new arg WILL_PRINT_ARCHIVE_INDEX.
Call dump_archive_index on archives if set.
(main): Update caller.
(any_control_option): Give it file scope, moved out of ...
(parse_opt): ... here.
tests/
2007-10-04 Roland McGrath <roland@redhat.com>
* run-readelf-test4.sh: New file.
* Makefile.am (TESTS, EXTRA_DIST): Add it.
- check whether dynamic section matches PT_DYNAMIC program header entry
- make sure text relocation flag is used correctly
libelf needed one extension for this.
lizhenlin