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| author | Kuan-Lin Chen <rufus@andestech.com> | 2019-11-14 14:24:22 +0800 |
|---|---|---|
| committer | Nelson Chu <nelson@rivosinc.com> | 2023-05-19 16:24:10 +0800 |
| commit | f1cd8b94e7c941c2a9107c1112ab2339916b8efd (patch) | |
| tree | 158d8ac0400a52e839bd8fabfec6bd15a8a1bdfe /include/elf | |
| parent | 26e91972538544a237897baa5c806a008d36a88c (diff) | |
| download | gdb-f1cd8b94e7c941c2a9107c1112ab2339916b8efd.zip gdb-f1cd8b94e7c941c2a9107c1112ab2339916b8efd.tar.gz gdb-f1cd8b94e7c941c2a9107c1112ab2339916b8efd.tar.bz2 | |
RISC-V: Support subtraction of .uleb128.
https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/96d6e190e9fc04a8517f9ff7fb9aed3e9876cbd6
There are some known limitations for now,
* Do not shrink the length of the uleb128 value, even if the value is reduced
after relaxations. Also reports error if the length grows up.
* The R_RISCV_SET_ULEB128 needs to be paired with and be placed before the
R_RISCV_SUB_ULEB128.
bfd/
* bfd-in2.h: Regenerated.
* elfnn-riscv.c (perform_relocation): Perform R_RISCV_SUB_ULEB128 and
R_RISCV_SET_ULEB128 relocations. Do not shrink the length of the
uleb128 value, and report error if the length grows up. Called the
generic functions, _bfd_read_unsigned_leb128 and _bfd_write_unsigned_leb128,
to encode the uleb128 into the section contents.
(riscv_elf_relocate_section): Make sure that the R_RISCV_SET_ULEB128
must be paired with and be placed before the R_RISCV_SUB_ULEB128.
* elfxx-riscv.c (howto_table): Added R_RISCV_SUB_ULEB128 and
R_RISCV_SET_ULEB128.
(riscv_reloc_map): Likewise.
(riscv_elf_ignore_reloc): New function.
* libbfd.h: Regenerated.
* reloc.c (BFD_RELOC_RISCV_SET_ULEB128, BFD_RELOC_RISCV_SUB_ULEB128):
New relocations to support .uleb128 subtraction.
gas/
* config/tc-riscv.c (md_apply_fix): Added BFD_RELOC_RISCV_SET_ULEB128
and BFD_RELOC_RISCV_SUB_ULEB128.
(s_riscv_leb128): Updated to allow uleb128 subtraction.
(riscv_insert_uleb128_fixes): New function, scan uleb128 subtraction
expressions and insert fixups for them.
(riscv_md_finish): Called riscv_insert_uleb128_fixes for all sections.
include/
* elf/riscv.h ((R_RISCV_SET_ULEB128, (R_RISCV_SUB_ULEB128): Defined.
ld/
* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Updated.
* testsuite/ld-riscv-elf/uleb128*: New testcase for uleb128 subtraction.
binutils/
* testsuite/binutils-all/nm.exp: Updated since RISCV supports .uleb128.
Diffstat (limited to 'include/elf')
| -rw-r--r-- | include/elf/riscv.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/elf/riscv.h b/include/elf/riscv.h index aabc71c..0aa8b33 100644 --- a/include/elf/riscv.h +++ b/include/elf/riscv.h @@ -87,6 +87,9 @@ START_RELOC_NUMBERS (elf_riscv_reloc_type) RELOC_NUMBER (R_RISCV_SET32, 56) RELOC_NUMBER (R_RISCV_32_PCREL, 57) RELOC_NUMBER (R_RISCV_IRELATIVE, 58) + /* Reserved 59 for R_RISCV_PLT32. */ + RELOC_NUMBER (R_RISCV_SET_ULEB128, 60) + RELOC_NUMBER (R_RISCV_SUB_ULEB128, 61) END_RELOC_NUMBERS (R_RISCV_max) /* Processor specific flags for the ELF header e_flags field. */ |