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Kuan-Lin Chen f1cd8b94e7 RISC-V: Support subtraction of .uleb128.
96d6e190e9

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.
2023-05-19 16:24:10 +08:00
bfd RISC-V: Support subtraction of .uleb128. 2023-05-19 16:24:10 +08:00
binutils RISC-V: Support subtraction of .uleb128. 2023-05-19 16:24:10 +08:00
config
contrib
cpu
elfcpp
etc
gas RISC-V: Support subtraction of .uleb128. 2023-05-19 16:24:10 +08:00
gdb Use lower-case in @sc in the documentation 2023-05-18 13:28:47 -06:00
gdbserver gdbserver: Clear upper ZMM registers in the right location. 2023-05-08 10:39:52 -07:00
gdbsupport gdb: Fix building with latest libc++ 2023-04-29 00:35:11 -07:00
gnulib
gold
gprof
gprofng gprofng: include a new function in the right place 2023-05-16 12:04:51 -07:00
include RISC-V: Support subtraction of .uleb128. 2023-05-19 16:24:10 +08:00
intl
ld RISC-V: Support subtraction of .uleb128. 2023-05-19 16:24:10 +08:00
libbacktrace
libctf
libdecnumber
libiberty
libsframe libsframe: testsuite: add tests for sframe_get_funcdesc_with_addr API 2023-05-17 23:14:52 -07:00
opcodes RISC-V: Minor improvements for dis-assembler. 2023-05-19 16:24:05 +08:00
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