The inline plt code emitted by gcc is incompatible with the
linker/ld.so --tls-get-addr-optimize scheme. This is the runtime
optimisation where the first call to __tls_get_addr results in
__tls_get_addr updating the tls_index pair, then the special linker
stub using that to short-circuit second and subsequent calls for a
given tls symbol. Enabled by default when the linker sees
__tls_get_addr_opt is preseent, and enabled in ld.so when DT_PPC64_OPT
has PPC64_OPT_TLS set. Note that this is distinct from link-time tls
optimisation.
PR 32387
* elf64-ppc.c (ppc64_elf_check_relocs): Disable tls_get_addr_opt
on detecting inline plt calls to __tls_get_addr.
(cherry picked from commit 1686dc7079f1c03bdaffd2f779b92aa2b7ad97b5)
If we generate an object file using an assembler with the new
relocations added, and then linking those files with an older
linker, the link will still complete and the linked file will
be generated.
In this case we should report an error instead of continuing
the linking process.
(cherry picked from commit 5966e2eb3fed61ebe5c091a074b368b9238a68c1)
When scanning relocations and determining whether TLS type transition is
possible, it will try to obtain the symbol got type. If the symbol got
type record has not yet been allocated space and initialized, it will
cause ld to crash. So when uninitialized, the symbol is set to GOT_UNKNOWN.
(cherry picked from commit b221bff7c7ca20d961a7e6b663a545384054a5be)
Commit d125f9675372b1ae01ceb1893c06ccb27bc7bf22 introduced a bug
in handling relocations for data. The R_PARISC_DIR32 relocation
operates on 32-bit data and not instructions. The HOWTO table
needs to be used to determine the format of relocations that apply
to data. The R_PARISC_SEGBASE relocation is another special case
as it only changes segment base.
This was noticed in Debian cmor package build.
2024-07-14 John David Anglin <danglin@gcc.gnu.org>
bfd/ChangeLog:
* elf32-hppa.c (final_link_relocate): Use HOWTO table to
determine reload format for relocations that apply to data.
There is no need to add a needed glibc version if the glibc base version
includes the needed glibc version.
PR ld/31966
* elflink.c (elf_link_add_glibc_verneed): Add glibc_minor_base.
Skip if the glibc base version includes the needed glibc version.
(_bfd_elf_link_add_glibc_version_dependency): Initialize
glibc_minor_base to INT_MAX and pass it to
elf_link_add_glibc_verneed.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
(cherry picked from commit 7757f66fdbe2a9fa4b51aa7792532fddda4b295c)
