The following additional commits should be backported to the RHEL-10 assembler and linker in order to improve support for part 1 of Intel's APX extensions:
X86 supports APX list:
1 Support APX GPR32 with rex2 prefix
commit 80d61d8d614d68a0b1932ed3a86d4cda01e5633e
2 Created an empty EVEX_MAP4_ sub-table for EVEX instructions.
commit 2b1d6655c5c62673547b9676d811ef58ce3f0d1e
3 Support APX GPR32 with extend evex prefix
commit 6177c84d5edc2cb6b197f00bd06380b7b24a719f
4 Add tests for APX GPR32 with extend evex prefix
commit ce9cddf5dd2a614815b1d9affa67c9419599ff63
5 Support APX NDD
commit 3083f376435662c747ab946bb84e6e6698985610
6 Support APX Push2/Pop2
commit 08a98d4c1331cc726c8c76c14d9db34d6f0aadd6
7 Support APX pushp/popp
commit ac32c879b26af580e29ecaa152e3d9d999f34caa
8 Support APX NDD optimized encoding.
commit 6967f19dcd3d2794976b2a193a0c30b626c92c3b
9 Support APX JMPABS for disassemble
commit cca90632f83d47bc7f913e098c4531e52327d272
10 gas: Mention initial support for Intel APX in NEWS
commit 5e2f0c9a5f3d467a341a0c3d579d9c6ee6daa4d1
11 x86: Don't use .insn with '/'
commit 2eda6e3ecdd0ea93586a532d9464e430f708334a
12 x86: Append "#pass" to APX tests
commit 302a296de0e83d6c320cc0f0d5dd1a1d73182009
13 i386: Use .insn describe jmpabs's testcases.
commit a0c9f938521a36b34a27740e5008e35f0ddd2b3f
14 i386: Correct adcx suffix in disassembler
commit f322084c7c842fbfd8c3291ff3f8d114173b4674
15 x86: add missing APX logic to cpu_flags_match()
commit 7c3df3c680c2bee0b17e60bfbadc751c67e05ed0

Ld supports APX list:
1 x86-64: Add R_X86_64_CODE_4_GOTPCRELX
3d5a60de52556f6a53d71d7e607c6696450ae3e4
2 gold: Handle R_X86_64_CODE_4_GOTPCRELX
4a54cb06585f568031dfd291d0fe45979ad75e98
3 x86-64: Add R_X86_64_CODE_4_GOTTPOFF/R_X86_64_CODE_4_GOTPC32_TLSDESC
a533c8df598b5ef99c54a13e2b137c98b34b043c
4 Gold: Handle R_X86_64_CODE_4_GOTPC32_TLSDESC/R_X86_64_CODE_4_GOTTPOFF
00a17c6ad068c95019e1f37cfc2d1b8aaebd6ecb
5 ld: Mention support for Intel APX relocations in NEWS
a6d0019eb7fcd634e12b7bcc535d5181c47fc82a
6 Fix x86-64: Add R_X86_64_CODE_4_GOTPCRELX
eed38d8a02b277825a682d8d1daeb0bcc4508b04