* cipher/asm-common-amd64.h (ret_spec_stop): New.
* cipher/arcfour-amd64.S: Use 'ret_spec_stop' for 'ret' instruction.
* cipher/blake2b-amd64-avx2.S: Likewise.
* cipher/blake2s-amd64-avx.S: Likewise.
* cipher/blowfish-amd64.S: Likewise.
* cipher/camellia-aesni-avx-amd64.S: Likewise.
* cipher/camellia-aesni-avx2-amd64.h: Likewise.
* cipher/cast5-amd64.S: Likewise.
* cipher/chacha20-amd64-avx2.S: Likewise.
* cipher/chacha20-amd64-ssse3.S: Likewise.
* cipher/des-amd64.S: Likewise.
* cipher/rijndael-aarch64.S: Likewise.
* cipher/rijndael-amd64.S: Likewise.
* cipher/rijndael-ssse3-amd64-asm.S: Likewise.
* cipher/rijndael-vaes-avx2-amd64.S: Likewise.
* cipher/salsa20-amd64.S: Likewise.
* cipher/serpent-avx2-amd64.S: Likewise.
* cipher/serpent-sse2-amd64.S: Likewise.
* cipher/sha1-avx-amd64.S: Likewise.
* cipher/sha1-avx-bmi2-amd64.S: Likewise.
* cipher/sha1-avx2-bmi2-amd64.S: Likewise.
* cipher/sha1-ssse3-amd64.S: Likewise.
* cipher/sha256-avx-amd64.S: Likewise.
* cipher/sha256-avx2-bmi2-amd64.S: Likewise.
* cipher/sha256-ssse3-amd64.S: Likewise.
* cipher/sha512-avx-amd64.S: Likewise.
* cipher/sha512-avx2-bmi2-amd64.S: Likewise.
* cipher/sha512-ssse3-amd64.S: Likewise.
* cipher/sm3-avx-bmi2-amd64.S: Likewise.
* cipher/sm4-aesni-avx-amd64.S: Likewise.
* cipher/sm4-aesni-avx2-amd64.S: Likewise.
* cipher/twofish-amd64.S: Likewise.
* cipher/twofish-avx2-amd64.S: Likewise.
* cipher/whirlpool-sse2-amd64.S: Likewise.
* mpi/amd64/func_abi.h (CFI_*): Remove, include from "asm-common-amd64.h"
instead.
(FUNC_EXIT): Use 'ret_spec_stop' for 'ret' instruction.
* mpi/asm-common-amd64.h: New.
* mpi/i386/mpih-add1.S: Use 'ret_spec_stop' for 'ret' instruction.
* mpi/i386/mpih-lshift.S: Likewise.
* mpi/i386/mpih-mul1.S: Likewise.
* mpi/i386/mpih-mul2.S: Likewise.
* mpi/i386/mpih-mul3.S: Likewise.
* mpi/i386/mpih-rshift.S: Likewise.
* mpi/i386/mpih-sub1.S: Likewise.
* mpi/i386/syntax.h (ret_spec_stop): New.