tree d00887dd57bbb95ce330ba0f3bddc20fcf3d1191
parent 294ed38a4b8516e9592b3af29874abcd66b274d8
author Peter Collingbourne <pcc@google.com> 1711484646 -0700
committer Peter Collingbourne <pcc@google.com> 1711589908 -0700

Disable Android relocation packing in linker.

Newer versions of lld write ifunc relocations for PLT entries
to .rela.dyn instead of .rela.plt. This causes a problem because
.rela.dyn is subject to Android relocation packing and we don't
support relocation packing when calling the linker's own ifunc
resolvers. Resolve the problem by passing --pack-dyn-relocs=relr
which disables Android relocation packing but keeps RELR packing
enabled which covers most of the relocations in the linker.

With the current toolchain there are only two entries in the linker's
.rela.dyn (and these entries look like a bug anyway) so there should
be no substantial change to binary size as a result of this change.

Relocation section '.rela.dyn' at offset 0x8e8 contains 2 entries:
    Offset             Info             Type               Symbol's Value  Symbol's Name + Addend
00000000001691d8  0000000100000401 R_AARCH64_GLOB_DAT     0000000000000000 ZSTD_trace_decompress_begin + 0
00000000001691e0  0000000200000401 R_AARCH64_GLOB_DAT     0000000000000000 ZSTD_trace_decompress_end + 0

Bug: 331450960
Change-Id: Idf403e775d134cbe208d6b1635a84a2a3e70b74b