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| author | Max Filippov <jcmvbkbc@gmail.com> | 2020-04-19 19:04:41 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2020-04-22 18:46:45 -0700 |
| commit | 30ce8e47fad9b057b6d7af9e1d43061126d34d20 (patch) | |
| tree | f1c9ab86407f5a80c78bdf436f2178d2aacc96dd /bfd/reloc.c | |
| parent | e44f65e3c5c9473d0dd98efa8c142d361b1273d7 (diff) | |
| download | gdb-30ce8e47fad9b057b6d7af9e1d43061126d34d20.zip gdb-30ce8e47fad9b057b6d7af9e1d43061126d34d20.tar.gz gdb-30ce8e47fad9b057b6d7af9e1d43061126d34d20.tar.bz2 | |
xtensa: fix PR ld/25861
Introduce new relaxations XTENSA_PDIFF{8,16,32} for positive differences
(subtracted symbol precedes diminished symbol) and XTENSA_NDIFF{8,16,32}
for negative differences (subtracted symbol follows diminished symbol).
Don't generate XTENSA_DIFF relocations in the assembler, generate
XTENSA_PDIFF or XTENSA_NDIFF based on relative symbol position.
Handle XTENSA_DIFF in BFD for compatibility with old object files.
Handle XTENSA_PDIFF and XTENSA_NDIFF in BFD, treating difference value
as unsigned.
2020-04-22 Max Filippov <jcmvbkbc@gmail.com>
bfd/
* bfd-in2.h: Regenerated.
* elf32-xtensa.c (elf_howto_table): New entries for
R_XTENSA_PDIFF{8,16,32} and R_XTENSA_NDIFF{8,16,32}.
(elf_xtensa_reloc_type_lookup, elf_xtensa_do_reloc)
(relax_section): Add cases for R_XTENSA_PDIFF{8,16,32} and
R_XTENSA_NDIFF{8,16,32}.
* libbfd.h (bfd_reloc_code_real_names): Add names for
BFD_RELOC_XTENSA_PDIFF{8,16,32} and
BFD_RELOC_XTENSA_NDIFF{8,16,32}.
* reloc.c: Add documentation for BFD_RELOC_XTENSA_PDIFF{8,16,32}
and BFD_RELOC_XTENSA_NDIFF{8,16,32}.
binutils/
* readelf.c (is_none_reloc): Recognize
BFD_RELOC_XTENSA_PDIFF{8,16,32} and
BFD_RELOC_XTENSA_NDIFF{8,16,32}.
gas/
* config/tc-xtensa.c (md_apply_fix): Replace
BFD_RELOC_XTENSA_DIFF{8,16,32} generation with
BFD_RELOC_XTENSA_PDIFF{8,16,32} and
BFD_RELOC_XTENSA_NDIFF{8,16,32} generation.
* testsuite/gas/xtensa/loc.d: Replace BFD_RELOC_XTENSA_DIFF16
with BFD_RELOC_XTENSA_PDIFF16 in the expected output.
include/
* elf/xtensa.h (elf_xtensa_reloc_type): New entries for
R_XTENSA_PDIFF{8,16,32} and R_XTENSA_NDIFF{8,16,32}.
ld/
* testsuite/ld-xtensa/relax-loc.d: New test definition.
* testsuite/ld-xtensa/relax-loc.s: New test source.
* testsuite/ld-xtensa/xtensa.exp (relax-loc): New test.
Diffstat (limited to 'bfd/reloc.c')
| -rw-r--r-- | bfd/reloc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/bfd/reloc.c b/bfd/reloc.c index c4dec86..f5df8e2 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -6556,6 +6556,8 @@ ENUMX ENUMX BFD_RELOC_XTENSA_DIFF32 ENUMDOC + Xtensa relocations for backward compatibility. These have been replaced + by BFD_RELOC_XTENSA_PDIFF and BFD_RELOC_XTENSA_NDIFF. Xtensa relocations to mark the difference of two local symbols. These are only needed to support linker relaxation and can be ignored when not relaxing. The field is set to the value of the difference @@ -6668,6 +6670,28 @@ ENUMX BFD_RELOC_XTENSA_TLS_CALL ENUMDOC Xtensa TLS relocations. +ENUM + BFD_RELOC_XTENSA_PDIFF8 +ENUMX + BFD_RELOC_XTENSA_PDIFF16 +ENUMX + BFD_RELOC_XTENSA_PDIFF32 +ENUMX + BFD_RELOC_XTENSA_NDIFF8 +ENUMX + BFD_RELOC_XTENSA_NDIFF16 +ENUMX + BFD_RELOC_XTENSA_NDIFF32 +ENUMDOC + Xtensa relocations to mark the difference of two local symbols. + These are only needed to support linker relaxation and can be ignored + when not relaxing. The field is set to the value of the difference + assuming no relaxation. The relocation encodes the position of the + subtracted symbol so the linker can determine whether to adjust the field + value. PDIFF relocations are used for positive differences, NDIFF + relocations are used for negative differences. The difference value + is treated as unsigned with these relocation types, giving full + 8/16 value ranges. ENUM BFD_RELOC_Z80_DISP8 |