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This adds support for ADD and SUB relocations as seen on RISC-V.
Signed-off-by: Andreas Schwab <[email protected]>
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The check_special_symbol backend functions used the Ehdr e_shstrndx
field to get at the name of sections. This is not correct if there
are more than SHN_LORESERVE sections. Always use elf_getshdrstrndx
to get the shstrtab section. And drop the Ehdr argument that isn't
necessary anymore.
Signed-off-by: Mark Wielaard <[email protected]>
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ARM data marker symbols "$d" indicate the start of a sequence of data
items in a section. For data only sections no data marker symbol is
necessary, but may be put pointing to the start of the section.
binutils however has a bug which places a data marker symbol somewhere
inside the section (at least for .debug_frame).
https://sourceware.org/bugzilla/show_bug.cgi?id=21809
When strip finds a symbol pointing to a debug section that would be
put into the .debug file then it will copy over the whole symbol table.
This isn't necessary because the symbol is redundant.
Add an ebl hook to recognize data marker symbols with implementations
for arm and aarch64. Use it in strip to strip such symbols from the
symbol table if they point to a debug section.
Signed-off-by: Mark Wielaard <[email protected]>
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When building with relro aarch64 splits .got in a writable and read-only
part. _GLOBAL_OFFSET_TABLE_ points to the first writable symbol, not the
start of .got.
https://bugzilla.redhat.com/show_bug.cgi?id=1201778
Signed-off-by: Mark Wielaard <[email protected]>
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Signed-off-by: Mark Wielaard <[email protected]>
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Like some other architectures aarch64 has a special rule for the
_GLOBAL_OFFSET_TABLE_ symbol. Even if there is a .plt.got section the symbol
value still points to the start of the .got section. This is also what the
dynamic linker expects.
See https://sourceware.org/ml/libc-ports/2013-06/msg00057.html
Signed-off-by: Mark Wielaard <[email protected]>
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Signed-off-by: Petr Machata <[email protected]>
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