4defa401d3
Aside from a straightforward rebase, this contains an out-of-tree patch from MaskRay which adds the `-Bsymbolic-non-weak-functions` flag to ld. |
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| 0001-Add-support-for-SerenityOS.patch | ||
| 0002-ld-Add-Bsymbolic-non-weak-functions.patch | ||
| ReadMe.md | ||
Patches for binutils on SerenityOS
0001-Add-support-for-SerenityOS.patch
Add support for SerenityOS
Teaches the assembler, BFD, and the linker about the SerenityOS target triple.
We set '/' to not start a comment in GAS, as the QEMU port uses it for division in constant expressions in assembly files (cf. as --divide).
/usr/lib/Loader.so is set as the default ELF interpreter.
On AArch64, we set COMMONPAGESIZE to enable RELRO support.
0002-ld-Add-Bsymbolic-non-weak-functions.patch
ld: Add -Bsymbolic-non-weak-functions
This option is a subset of -Bsymbolic-functions: only STB_GLOBAL are considered. Vague linkage functions are STB_WEAK. A vague linkage function may have different addresses in a -Bsymbolic-functions linked shared object and outside the shared object. -Bsymbolic-non-weak-functions can keep pointer equality while providing most benefits: (a) fewer JUMP_SLOT (symbol lookups) (b) avoid PLT entries for default visibility defined functions.
PR 27871
include/ * bfdlink.h (struct bfd_link_info): Add dynamic_weak_functions. ld/ * ldlex.h (enum option_values): Add OPTION_SYMBOLIC_NON_WEAK_FUNCTIONS. * lexsup.c (struct ld_options): Add -Bsymbolic-non-weak-functions. (enum symbolic_enum): Add symbolic_non_weak_functions. (parse_args): Handle -Bsymbolic-non-weak-functions. * ld.texi: Document -Bsymbolic-non-weak-functions. * NEWS: Mention -Bsymbolic-non-weak-functions. * testsuite/ld-elf/shared.exp: Add tests. * testsuite/ld-elf/symbolic-non-weak-func.s: New file. * testsuite/ld-elf/symbolic-non-weak-func-a.rd: Likewise. * testsuite/ld-elf/symbolic-non-weak-func-b.rd: Likewise.