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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id j14-20020a05620a288e00b0077dc416a858si2914743qkp.105.2023.12.01.01.04.40 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 01:04:41 -0800 (PST) Received-SPF: pass (google.com: domain of binutils-bounces+ouuuleilei=gmail.com@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; arc=pass (i=1); spf=pass (google.com: domain of binutils-bounces+ouuuleilei=gmail.com@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="binutils-bounces+ouuuleilei=gmail.com@sourceware.org" Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id C6296386188E for ; Fri, 1 Dec 2023 09:04:40 +0000 (GMT) X-Original-To: binutils@sourceware.org Delivered-To: binutils@sourceware.org Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 18276385C413 for ; Fri, 1 Dec 2023 09:04:30 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 18276385C413 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=loongson.cn ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 18276385C413 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1701421473; cv=none; b=hpwLFcFcx3QLxOqREmgV4PEqUuo17bcn6cJfeJR9JTqJGHZmcCPa8Uas1uCmYrOtxsyNsvrDeA9JGMuczuQyLVG5fHlF+NyZ+Vd9JWf+i0jx9DQPNlUzSnjjOe7IdAwZRbqaEMHZz7kOsiXlVmuygJSNFJfg2fJDNood45Gg6/0= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1701421473; c=relaxed/simple; bh=hKulfmY05zend1NXwEtCXtQN+mgRfEMi9bp8WBqoqgc=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=yDFe1eV4lmNsY90h93TqHG+IFNRliCs2m+Dn5OQz0ytkp76zvH+MHXmthZD1Qy2h8mkoyQmNNywi9Wk0+0chWYfB4Ql+T4KE0C0q0XB2cuJWVqLENlUulwD+rhSonDXNq8aHtSdPpqmv1XICJ2FnwS66Ak72cNLNsmZGRNczjrk= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from loongson.cn (unknown [10.2.6.5]) by gateway (Coremail) with SMTP id _____8Cx5_GboWll4Sg+AA--.58118S3; Fri, 01 Dec 2023 17:04:27 +0800 (CST) Received: from 5.5.5 (unknown [10.2.6.5]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxS9yaoWll53hRAA--.48257S4; Fri, 01 Dec 2023 17:04:26 +0800 (CST) From: Lulu Cai To: binutils@sourceware.org Cc: xuchenghua@loongson.cn, chenglulu@loongson.cn, liuzhensong@loongson.cn, mengqinggang@loongson.cn, xry111@xry111.site, i.swmail@xen0n.name, maskray@google.com, luweining@loongson.cn, wanglei@loongson.cn, hejinyang@loongson.cn, Lulu Cai Subject: [PATCH v1 0/4] LoongArch: Add support for TLS Descriptors (TLSDESC) Date: Fri, 1 Dec 2023 17:04:20 +0800 Message-Id: <20231201090424.854662-1-cailulu@loongson.cn> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxS9yaoWll53hRAA--.48257S4 X-CM-SenderInfo: xfdlz3tox6z05rqj20fqof0/1tbiAQAMB2VpQqsHYwAJsC X-Coremail-Antispam: 1Uk129KBj93XoWxCFWDXFW8JF4rtw4fCr47Jrc_yoWrJrW8p3 y3ZFnYka18CFZrXF95W345XFn5XayxGrWaga4ftF1akwsaqry0vwn7trZxXay5JayDt34F vw109w13WF1UtFbCm3ZEXasCq-sJn29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkFb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r126r1DMcIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07UMpBfUUUUU= X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, 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: 1784069731273791552 X-GMAIL-MSGID: 1784069731273791552 The LoongArch TLS Descriptors implementation contains several points: 1. The instruction sequences is: pcalau12i $a0,%desc_pc_hi20(var) #R_LARCH_TLS_DESC_PC_HI20 ld.d $a1,$a0,%desc_ld_pc_lo12(var) #R_LARCH_TLS_DESC_LD_PC_LO12 addi.d $a0,$a0,%desc_add_pc_lo12(var) #R_LARCH_TLS_DESC_ADD_PC_LO12 jirl $ra,$a1,%desc_call(var) #R_LARCH_TLS_DESC_CALL The linker for each DESC generates a R_LARCH_TLS_DESC64 dynamic relocation, which relocation is placed at .rela.dyn. TLSDESC always allocates two GOT slots and one dynamic relocation space to TLSDESC. 2. When using multiple ways to access the same TLS variable, a maximum of 5 GOT slots are used. For example, using GD, TLSDESC, and IE to access the same TLS variable,GD always uses the first two of the five GOT, TLSDESC uses the third and fourth, and IE uses the last. 3. TLSDESC always requires dynamic relocation because of LoongArch does not yet have a tls type transition. Howerer statically linked programs cannot resolve TLSDESC's dynamic relocation, so we did a type transition for this case. DESC -> LE: pcalau12i $a0,%desc_pc_hi20(var) => lu12i.w $a0,%le_hi20(var) ld.d $a1,$a0,%desc_ld_pc_lo12(var) => ori $a0,$a0,%le_lo12(var) addi.d $a0,$a0,%desc_add_pc_lo12(var) => NOP jirl $ra,$a1,%desc_call(var) => NOP 4. The current code passes the tests of gas ld and glibc. Lulu Cai (4): LoongArch: Add new relocs and macro for TLSDESC. LoongArch: Add support for TLSDESC in ld. LoongArch: Add transition support for DESC to LE. LoongArch: Add testsuits for TLSDESC in gas and ld. bfd/bfd-in2.h | 12 + bfd/elfnn-loongarch.c | 276 ++++++++++++++++-- bfd/elfxx-loongarch.c | 209 ++++++++++++- bfd/libbfd.h | 12 + bfd/reloc.c | 29 ++ gas/config/tc-loongarch.c | 14 +- gas/testsuite/gas/loongarch/tlsdesc_32.d | 26 ++ gas/testsuite/gas/loongarch/tlsdesc_32.s | 12 + gas/testsuite/gas/loongarch/tlsdesc_64.d | 26 ++ gas/testsuite/gas/loongarch/tlsdesc_64.s | 12 + .../gas/loongarch/tlsdesc_large_abs.d | 21 ++ .../gas/loongarch/tlsdesc_large_abs.s | 9 + .../gas/loongarch/tlsdesc_large_pc.d | 34 +++ .../gas/loongarch/tlsdesc_large_pc.s | 16 + include/elf/loongarch.h | 22 +- include/opcode/loongarch.h | 3 + .../ld-loongarch-elf/ld-loongarch-elf.exp | 16 + ld/testsuite/ld-loongarch-elf/tls-desc.dd | 74 +++++ ld/testsuite/ld-loongarch-elf/tls-desc.rd | 79 +++++ ld/testsuite/ld-loongarch-elf/tls-desc.s | 102 +++++++ .../ld-loongarch-elf/tls-relax-desc-le.d | 15 + .../ld-loongarch-elf/tls-relax-desc-le.s | 8 + opcodes/loongarch-opc.c | 54 ++++ 23 files changed, 1054 insertions(+), 27 deletions(-) create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_32.d create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_32.s create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_64.d create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_64.s create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_large_abs.d create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_large_abs.s create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_large_pc.d create mode 100644 gas/testsuite/gas/loongarch/tlsdesc_large_pc.s create mode 100644 ld/testsuite/ld-loongarch-elf/tls-desc.dd create mode 100644 ld/testsuite/ld-loongarch-elf/tls-desc.rd create mode 100644 ld/testsuite/ld-loongarch-elf/tls-desc.s create mode 100644 ld/testsuite/ld-loongarch-elf/tls-relax-desc-le.d create mode 100644 ld/testsuite/ld-loongarch-elf/tls-relax-desc-le.s