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Mon, 05 Feb 2024 02:14:47 -0800 (PST) From: YunQiang Su To: nickc@redhat.com Cc: binutils@sourceware.org, macro@orcam.me.uk, xry111@xry111.site Subject: [PATCH] MIPS/Gas: Support .L/$ as the mark of local symbol Date: Mon, 5 Feb 2024 18:14:27 +0800 Message-Id: <20240205101427.2862503-1-syq@gcc.gnu.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-Spam-Status: No, score=-11.0 required=5.0 tests=BAYES_00, FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM, GIT_PATCH_0, HEADER_FROM_DIFFERENT_DOMAINS, KAM_DMARC_STATUS, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE 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: binutils@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: binutils-bounces+ouuuleilei=gmail.com@sourceware.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790053556964389420 X-GMAIL-MSGID: 1790053556964389420 In as.texi, there are lines: A local symbol is any symbol beginning with certain local label prefixes. By default, the local label prefix is @samp{.L} for ELF systems or @samp{L} for traditional a.out systems, but each target may have its own set of local label prefixes. Let's support it for MIPS: 1) For OldABI, GCC uses "$" to mark local symbols, and for NewABI, ".L" is used. So let's support both for OldABI, and ".L" only for NewABI. 2) Emit an fatal error, if a local symbol is used, while not defined, just like LLVM does. --- gas/config/tc-mips.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c index 43c12de2c8a..a84b13e1815 100644 --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -17725,6 +17725,16 @@ pic_need_relax (symbolS *sym) if (symbol_section_p (sym)) return true; + if (strstr (S_GET_NAME (sym), ".L") == S_GET_NAME (sym) + || ((mips_abi == O64_ABI || mips_abi == O32_ABI) + && strstr (S_GET_NAME (sym), "$") == S_GET_NAME (sym))) + { + if (!S_IS_DEFINED (sym)) + as_fatal (_("undefined temporary symbol: %s"), + S_GET_NAME (sym)); + return true; + } + symsec = S_GET_SEGMENT (sym); /* This must duplicate the test in adjust_reloc_syms. */