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[75.166.130.93]) by smtp.gmail.com with ESMTPSA id f13-20020a056e0204cd00b003179d4bd50asm3953273ils.75.2023.03.07.10.59.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Mar 2023 10:59:16 -0800 (PST) To: Ulrich Weigand via Gdb-patches Cc: "tdevries@suse.de" , "cel@us.ibm.com" , Ulrich Weigand , "will_schmidt@vnet.ibm.com" Subject: Re: [PATCH] PowerPC, fix gdb.base/retval-large-struct.exp References: <71926c391f43cee2051ea0c9b449ec0aecc847ec.camel@us.ibm.com> X-Attribution: Tom Date: Tue, 07 Mar 2023 11:59:15 -0700 In-Reply-To: (Ulrich Weigand via Gdb-patches's message of "Fri, 18 Nov 2022 16:04:53 +0000") Message-ID: <87cz5ks7zw.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Tom Tromey via Gdb-patches Reply-To: Tom Tromey Errors-To: gdb-patches-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb-patches" >>>>> "Ulrich" == Ulrich Weigand via Gdb-patches writes: Ulrich> No, it's not really powerpc specific - the same mechanism can be Ulrich> used on many other platforms with an ABI that uses a return buffer Ulrich> address that is not preserved. (E.g. we're currently looking into Ulrich> enabling it on s390x.) I am curious if it makes sense to enable for 32-bit PPC. That is, the appended seems to help with a "large struct return" test case we have internally, but I don't know the PPC ABI well enough to know if it's really correct, or if it's just working by accident. Tom diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index 261ce77345e..218fb35efed 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -8249,7 +8249,11 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) ppc64_sysv_get_return_buf_addr); } else - set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value); + { + set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value); + set_gdbarch_get_return_buf_addr (gdbarch, + ppc64_sysv_get_return_buf_addr); + } /* Set lr_frame_offset. */ if (wordsize == 8)