From d6b99a80716d2f0e21baae97a8653204dd354ad3 Mon Sep 17 00:00:00 2001 From: Tsukasa OI Date: Sat, 10 Sep 2022 06:49:43 +0000 Subject: [PATCH] RISC-V: Add privileged extensions without instructions/CSRs Currently, GNU Binutils does not support following privileged extensions: - 'Smepmp' - 'Svnapot' - 'Svpbmt' as they do not provide new CSRs or new instructions ('Smepmp' extends the privileged architecture CSRs but does not define the CSR itself). However, adding them might be useful as we no longer have to "filter" ISA strings just for toolchains (if full ISA string is given by a vendor, we can straightly use it). And there's a fact that supports this theory: there's already an (unprivileged) extension which does not provide CSRs or instructions (but only an architectural guarantee): 'Zkt' (constant timing guarantee for certain subset of RISC-V instructions). This simple commit simply adds three privileged extensions listed above. bfd/ChangeLog: * elfxx-riscv.c (riscv_supported_std_s_ext): Add 'Smepmp', 'Svnapot' and 'Svpbmt' extensions. --- bfd/elfxx-riscv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c index fa393c7c427..c67d4167232 100644 --- a/bfd/elfxx-riscv.c +++ b/bfd/elfxx-riscv.c @@ -1211,10 +1211,13 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] = static struct riscv_supported_ext riscv_supported_std_s_ext[] = { + {"smepmp", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"smstateen", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"sscofpmf", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"sstc", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"svinval", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, + {"svnapot", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, + {"svpbmt", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {NULL, 0, 0, 0, 0} }; -- 2.30.2