| 63f93c7e | 28-Dec-2020 |
Ryan Libby <[email protected]> |
rtld-elf: link libcompiler_rt on all architectures
Statically link rtld-elf with libcompiler_rt on all architectures so
that we don't need to try to pick and choose the bits we need from it
for each
rtld-elf: link libcompiler_rt on all architectures
Statically link rtld-elf with libcompiler_rt on all architectures so
that we don't need to try to pick and choose the bits we need from it
for each architecture (we now leave that to the linker). Compilers may
emit calls to support functions in this library, but because of the use
of the linker flag -nostdlib for rtld's special needs, the library is
not linked as normal.
Previously we had two different solutions. On some architectures, we
were able to extract reimplementations of the necessary builtin
functions from our special build of libc. On ARM, we just linked
libcompiler_rt.
This is motivated by the same issue as D26199 and D27665, but should be
a simpler solution that will apply to all architectures.
Reviewed by: arichardson, kib
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D27736
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| bce2cff0 | 19-Dec-2020 |
Ryan Libby <[email protected]> |
rtld-elf: link udivmoddi4 from compiler_rt
This fixes the gcc9 build of rtld-elf32 on amd64, which needed an
implementation of udivmoddi4.
rtld-elf uses certain functions normally found in libc, an
rtld-elf: link udivmoddi4 from compiler_rt
This fixes the gcc9 build of rtld-elf32 on amd64, which needed an
implementation of udivmoddi4.
rtld-elf uses certain functions normally found in libc, and so it
includes certain files from libc in its own build. It has two
mechanisms to include files from libc: one that rebuilds source files in
the rtld-elf environment, and one that extracts object files from a
purpose-built no-SSP PIC archive.
In addition to libc functions, rtld-elf may need to link functions
normally found in libcompiler_rt (formerly libgcc). Now, add an ability
to rebuild libcompiler_rt source files in the rtld-elf environment. We
don't yet have a need for an object file extraction mechanism.
libcompiler_rt could also supply udivdi3 and umoddi3, but leave them
alone for now.
Reviewed by: arichardson, kib
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D27665
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