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