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Tue, 15 Sep 2026 17:28:49 -0700 (PDT) Received: from ausc-rvsw-c-01-anton.tenstorrent.com ([38.104.49.66]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-6c7a6f8a92dsm1257244eaf.10.2026.09.15.17.28.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Sep 2026 17:28:48 -0700 (PDT) From: Anton Blanchard To: gdb-patches@sourceware.org Cc: Anton Blanchard Subject: [PATCH] RISC-V: Use hardware single step when available Date: Wed, 16 Sep 2026 00:28:31 +0000 Message-Id: <20260916002831.1775922-1-antonb@tenstorrent.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org If the target supports hardware single-stepping use it instead of inserting software breakpoints. We continue to use software breakpoints for stepping over LR/SC atomic sequences. --- gdb/riscv-tdep.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c index 100a44cddf3..0413d7b1a35 100644 --- a/gdb/riscv-tdep.c +++ b/gdb/riscv-tdep.c @@ -4707,6 +4707,11 @@ riscv_software_single_step (struct regcache *regcache) if (!next_pcs.empty ()) return next_pcs; + /* If the target supports hardware single-stepping, software + single-stepping is unnecessary. */ + if (target_can_do_single_step ()) + return {}; + next_pc = riscv_next_pc (regcache, cur_pc); return {next_pc}; -- 2.34.1