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Wed, 18 Jun 2025 01:43:16 -0700 (PDT) Received: from sw03.internal.sifive.com ([4.53.31.132]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2365e0d0bc4sm94079215ad.243.2025.06.18.01.43.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jun 2025 01:43:15 -0700 (PDT) From: Jesse Huang To: libc-alpha@sourceware.org Cc: andrew@sifive.com, darius@bluespec.com, debug@rivosinc.com, jlaw@ventanamicro.com, kito.cheng@sifive.com, palmer@dabbelt.com, Jesse Huang Subject: [PATCH 01/12] riscv: Add --enable-cfi option for controlling cfi features Date: Wed, 18 Jun 2025 01:42:47 -0700 Message-Id: <20250618084258.2728346-2-jesse.huang@sifive.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250618084258.2728346-1-jesse.huang@sifive.com> References: <20250618084258.2728346-1-jesse.huang@sifive.com> MIME-Version: 1.0 X-Spam-Status: No, score=-12.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces~patchwork=sourceware.org@sourceware.org --- configure | 12 ++++++++++++ configure.ac | 6 ++++++ 2 files changed, 18 insertions(+) diff --git a/configure b/configure index 7cda641fce..5a996c8f25 100755 --- a/configure +++ b/configure @@ -818,6 +818,7 @@ enable_nscd enable_pt_chown enable_mathvec enable_cet +enable_cfi enable_scv enable_fortify_source with_cpu @@ -1499,6 +1500,7 @@ Optional Features: depends on architecture] --enable-cet enable Intel Control-flow Enforcement Technology (CET), x86 only + --enable-cfi enable Control Flow Integrity (CFI), RISC-V only --disable-scv syscalls will not use scv instruction, even if the kernel supports it, powerpc only --enable-fortify-source[=1|2|3] @@ -4853,6 +4855,16 @@ esac fi +# Check whether --enable-cfi was given. +if test ${enable_cfi+y} +then : + enableval=$enable_cfi; enable_cfi=$enableval +else case e in #( + e) enable_cfi=no ;; +esac +fi + + # Check whether --enable-scv was given. if test ${enable_scv+y} then : diff --git a/configure.ac b/configure.ac index 0b0d8875cc..9bda3d1520 100644 --- a/configure.ac +++ b/configure.ac @@ -421,6 +421,12 @@ AC_ARG_ENABLE([cet], [enable_cet=$enableval], [enable_cet=$libc_cv_compiler_default_cet]) +AC_ARG_ENABLE([cfi], + AS_HELP_STRING([--enable-cfi], + [enable Control Flow Integrity (CFI), RISC-V only]), + [enable_cfi=$enableval], + [enable_cfi=no]) + AC_ARG_ENABLE([scv], AS_HELP_STRING([--disable-scv], [syscalls will not use scv instruction, even if the kernel supports it, powerpc only]),