[PATCH v11 0/5] elf: Allow RPATH/RUNPATH for static-pie
Adhemerval Zanella Netto
adhemerval.zanella@linaro.org
Thu Aug 20 17:26:15 GMT 2026
Ping.
On 28/07/26 18:13, Adhemerval Zanella wrote:
> Although static binaries do not support rpath (since they lack dynamic
> sections), adding static-pie support only affects the dlopen function.
> It is one less unexpected behavior (where dynamic and static binaries
> support and behave differently), and if/when static dlopen support is
> removed, this will become a no-op.
>
> The testcase from BZ 33326 triggered a deep issue with an assert in
> startup code, which required changes to multiple ABIs to properly fix
> (even though the assert itself was removed in the last patch). There
> are still other assert usage, although most, if not all, are for
> ill-formatted ELF files.
>
> Changes from v10:
> * s390: only redirect __strchrnul when the ifunc is built (fixes
> --disable-multi-arch build).
> * _dl_mmap now issues the syscall directly, since setting errno on
> failure also requires the thread pointer.
> * Turn stack protection off for mempcpy as well, which is called by
> __libc_message_impl on targets without an assembly implementation.
> * Dropped the duplicated memcpy (aarch64) and strlen (x86_64)
> redirections.
> * elf/tst-pie-rpath-static is now a container test.
> * Fixed the __tunables_init prototype in the new startup test, plus
> assorted Makefile and comment cleanups.
>
> Changes from v9:
> * Rebased against master.
> * Added review from previous version.
>
> Changes from v8:
> * Rebased against master.
> * Added review from previous version.
>
> Changes from v7:
> * Also raise SIGABRT on assert for ld.so. The hurd __raise_direct
> is no-op that requires a proper implementation (so current semantic
> is kept).
>
> Changes from v6:
> * Improve comments.
> * Remove unused files.
>
> Changes from v5:
> * Move _dl_writev and _dl_mmap to their own TU for i386 to avoid
> I386_USE_SYSENTER redefinition.
> * Fixed generic __raise_direct and add a TODO for Hurd.
>
> Changes from 4:
> * Rename __raise_nocancel to __raise_direct and remove default
> implementation.
> * Simplify _dl_writev.
>
> Changes from v3:
> * Added Wilco's suggestion on fallback implementation for ctz/clz.
> * Rebased against master.
> * Fixed another riscv issues.
>
> Changes from v2:
> * Fixed a build for x86_64-linux-gnu-v3.
> * Adjust the elf/tst-pie-rpath-static to run correctly when
> --enable-hardcoded-path-in-tests is not used
>
> Changes from v1:
> * Change the ctz/clz fallback to simpler algorithms and use a different
> header/macro with a better explanation of its intend.
> * Rename __pthread_kill_self to __raise_nostatus.
> * Fixed assert also for powerpc-power4 and riscv.
>
> Adhemerval Zanella (5):
> nptl: Add __raise_direct
> Use _dl_writev on __libc_message_impl
> Fix assert during static startup (BZ 33326)
> elf: Allow RPATH/RUNPATH for static-pie (BZ 33326)
> elf: Remove __chk_fail from dl-minimal.c
>
> assert/Makefile | 5 +++
> elf/Makefile | 27 ++++++++++++
> elf/dl-load.c | 2 +-
> elf/dl-minimal.c | 8 ----
> elf/dl-reloc-static-pie.c | 2 +-
> elf/get-dynamic-info.h | 7 +--
> elf/rtld.c | 4 +-
> elf/setup-vdso.h | 2 +-
> elf/tst-assert-startup-static.c | 43 +++++++++++++++++++
> elf/tst-pie-rpath-mod.c | 19 ++++++++
> elf/tst-pie-rpath-static.c | 38 ++++++++++++++++
> .../tst-pie-rpath-static.script | 2 +
> include/signal.h | 3 ++
> include/sys/cdefs.h | 1 -
> libio/Makefile | 5 +++
> nptl/pthread_kill.c | 21 +++------
> stdlib/Makefile | 5 +++
> stdlib/abort.c | 2 +-
> string/Makefile | 22 +++++++---
> .../aarch64/multiarch/dl-symbol-redir-ifunc.h | 2 +-
> sysdeps/aarch64/multiarch/memcpy_generic.S | 4 ++
> sysdeps/generic/dl-mmap.h | 37 ++++++++++++++++
> {elf => sysdeps/generic}/dl-writev.h | 18 ++++----
> sysdeps/htl/raise.c | 2 +
> .../lp64/multiarch/dl-symbol-redir-ifunc.h | 1 +
> sysdeps/posix/libc_fatal.c | 27 +++++++-----
> sysdeps/posix/raise.c | 2 +-
> .../powerpc32/power4/multiarch/Makefile | 5 +++
> .../be/multiarch/dl-symbol-redir-ifunc.h | 27 ++++++++++++
> .../le/multiarch/dl-symbol-redir-ifunc.h | 1 +
> sysdeps/powerpc/powerpc64/multiarch/Makefile | 5 ++-
> sysdeps/s390/Makefile | 5 +++
> .../s390/multiarch/dl-symbol-redir-ifunc.h | 5 +++
> sysdeps/s390/string-bitops.h | 28 ++++++++++++
> sysdeps/unix/sysv/linux/Makefile | 16 +++++++
> sysdeps/unix/sysv/linux/dl-mmap.h | 40 +++++++++++++++++
> sysdeps/unix/sysv/linux/dl-writev.h | 12 ++----
> sysdeps/unix/sysv/linux/i386/Makefile | 14 ++++++
> sysdeps/unix/sysv/linux/i386/dl-mmap.c | 38 ++++++++++++++++
> sysdeps/unix/sysv/linux/i386/dl-mmap.h | 27 ++++++++++++
> .../linux/{libc_fatal.c => i386/dl-writev.c} | 28 ++++++------
> sysdeps/unix/sysv/linux/i386/dl-writev.h | 15 ++++---
> sysdeps/unix/sysv/linux/i386/raise_direct.c | 26 +++++++++++
> sysdeps/unix/sysv/linux/raise_direct.c | 31 +++++++++++++
> .../unix/sysv/linux/riscv/multiarch/Makefile | 12 ++++--
> .../x86_64/multiarch/dl-symbol-redir-ifunc.h | 18 ++++++--
> 46 files changed, 564 insertions(+), 100 deletions(-)
> create mode 100644 elf/tst-assert-startup-static.c
> create mode 100644 elf/tst-pie-rpath-mod.c
> create mode 100644 elf/tst-pie-rpath-static.c
> create mode 100644 elf/tst-pie-rpath-static.root/tst-pie-rpath-static.script
> create mode 100644 sysdeps/generic/dl-mmap.h
> rename {elf => sysdeps/generic}/dl-writev.h (80%)
> create mode 100644 sysdeps/powerpc/powerpc64/be/multiarch/dl-symbol-redir-ifunc.h
> create mode 100644 sysdeps/s390/string-bitops.h
> create mode 100644 sysdeps/unix/sysv/linux/dl-mmap.h
> create mode 100644 sysdeps/unix/sysv/linux/i386/dl-mmap.c
> create mode 100644 sysdeps/unix/sysv/linux/i386/dl-mmap.h
> rename sysdeps/unix/sysv/linux/{libc_fatal.c => i386/dl-writev.c} (58%)
> create mode 100644 sysdeps/unix/sysv/linux/i386/raise_direct.c
> create mode 100644 sysdeps/unix/sysv/linux/raise_direct.c
>
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