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Sat, 25 Apr 2026 01:12:03 -0700 (PDT) Received: from localhost ([2804:14d:7e39:8083:f04c:42e3:5943:38f6]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2e53d2cfef3sm34495714eec.24.2026.04.25.01.12.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Apr 2026 01:12:02 -0700 (PDT) From: Thiago Jung Bauermann To: Cc: , Subject: Re: [PATCH 3/4] gdb/aarch64: record/replay support for RPRFM and PRFM (reg) In-Reply-To: <20260420215232.68675-4-Ezra.Sitorus@arm.com> (Ezra Sitorus's message of "Mon, 20 Apr 2026 22:52:31 +0100") References: <20260420215232.68675-1-Ezra.Sitorus@arm.com> <20260420215232.68675-4-Ezra.Sitorus@arm.com> User-Agent: mu4e 1.14.0; emacs 30.2 Date: Sat, 25 Apr 2026 05:12:00 -0300 Message-ID: <87se8ja27j.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain 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 writes: > From: Ezra Sitorus > > The PRFM (register) instruction variant was unsupported. This is added > along with RPRFM. > > No testcase has been added as these are hint instructions which don't > modify registers/memory. I'm happy to add them in if you think these are > required. > > The full testsuite was done on aarch64-none-linux-gnu without RPRFM. > The gdb.arch and gdb.reverse tests were run on Shrinkwrap with RPRFM > support. I've observed unrelated regressions that appear to be due to > Shrinkwrap rather than my patch. > --- > gdb/aarch64-tdep.c | 5 +++++ > 1 file changed, 5 insertions(+) Reviewed-by: Thiago Jung Bauermann This patch made me notice that 1. Arm has a PRFUM instruction and 2., it's not supported by aarch64_record_load_store either. Considering that there will be a v2, would you mind adding support for it as well, for completeness? I think that would complete support for the prefetch instructions. > diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c > index 81d4f160f8f..61c462979b3 100644 > --- a/gdb/aarch64-tdep.c > +++ b/gdb/aarch64-tdep.c > @@ -5914,6 +5914,11 @@ aarch64_record_load_store (aarch64_insn_decode_record *aarch64_insn_r) > else > if (size_bits != 0x03) > ld_flag = 0x01; > + else if (size_bits == 0x3 && vector_flag == 0x0 && opc == 0x2) > + { > + /* PRFM (register) or RPRFM */ > + return AARCH64_RECORD_SUCCESS; > + } > else > return AARCH64_RECORD_UNKNOWN; -- Thiago