From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-m6030.netease.com (mail-m6030.netease.com [210.79.60.30]) by sourceware.org (Postfix) with ESMTPS id 7FEAE3858D32 for ; Thu, 28 Dec 2023 03:40:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 7FEAE3858D32 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=stu.xupt.edu.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=stu.xupt.edu.cn ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 7FEAE3858D32 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=210.79.60.30 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1703734817; cv=none; b=EJJo69O4DTHcArErSaVnTpUFdFR4kQfYEE67BOGHDclitoFo+lFQoxXDC0VD6rckuOUNHi8WqQ7cBr4C5VDBeToDs18H9trVAGmaaI+PYYPtV1bXhdpCzZsCby4MQjLdVAFtSGodGpybqgy8oMN78Iz2CMdciYNkOoa0crvsMs0= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1703734817; c=relaxed/simple; bh=Y3HbNwP039RSMz6fFktWensQVCQMRh5TZy/DR4MIWYY=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=fuvW+YtqZlW1F7I65gzNKVh2RTs1oY8cA5KAAWaMDsciL0klgnnE3+pZ8B9Y5yhbOZPXN9Wg8V6bu4AMM61B723VohpnsC/xBIKNGWq0asgybHLF7OcDsnHdYrtXIxbR8IvjS1/sl9aiufwQ9FA/1I4a7BlRlXQ/E8paVBWEyyQ= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from ubuntu.localdomain (unknown [111.18.37.154]) by mail-m121144.qiye.163.com (Hmail) with ESMTPA id 7A3B1AC0095; Thu, 28 Dec 2023 11:40:01 +0800 (CST) From: changjiachen To: binutils@sourceware.org Cc: xuchenghua@loongson.cn, chenglulu@loongson.cn, liuzhensong@loongson.cn, xry111@xry111.site, i.swmail@xen0n.name, maskray@google.com, cailulu@loongson.cn, luweining@loongson.cn, wanglei@loongson.cn, hejinyang@loongson.cn, Lazy_Linux@126.com, mengqinggang@loongson.cn, changjiachen Subject: [PATCH v5 1/5] LoongArch: bfd: Add support for tls le relax. Date: Thu, 28 Dec 2023 11:39:53 +0800 Message-Id: <20231228033957.108449-2-changjiachen@stu.xupt.edu.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231228033957.108449-1-changjiachen@stu.xupt.edu.cn> References: <20231228033957.108449-1-changjiachen@stu.xupt.edu.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWS1ZQUlXWQ8JGhUIEh9ZQVkaSUtPVhoeQk5LTUtLHR4YH1UTARMWGhIXJBQOD1 lXWRgSC1lBWUpKSlVKQ1VITFVKTk9ZV1kWGg8SFR0UWUFZT0tIVUpNQ0xDS1VKS0tVSkJLS1kG X-HM-Tid: 0a8cae81f667b039kuuu7a3b1ac0095 X-HM-MType: 10 X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6PU06Kww4PDwwLw9RDTgoAkJL STZPCR5VSlVKTEtITEhPQ0tJQ09MVTMWGhIXVRgTGhUcERIaGBMeFTsIDw5VAw4LD1UeHw5VGBVF WVdZEgtZQVlKSkpVSkNVSExVSk5PWVdZCAFZQUpJSUhCNwY+ X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00,GIT_PATCH_0,KAM_DMARC_STATUS,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 List-Id: Add tls le relax support and related relocs in bfd. New relocation related explanation can refer to the following url: https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc This support does two main things: 1. Implement support for three new relocation items in bfd. The three new relocation items are shown below: R_LARCH_TLS_LE_ADD_R R_LARCH_TLS_LE_HI20_R R_LARCH_TLS_LE_LO12_R 2. ADD a new macro RELOCATE_TLS_TP32_HI20 Handle problems caused by symbol extensions in TLS LE, The processing is similar to the macro RELOCATE_CALC_PC32_HI20 method. 3. Implement the tls le relax function. bfd/ChangeLog: * bfd-in2.h: Add relocs related to tls le relax. * elfnn-loongarch.c: (loongarch_relax_tls_le): New function. (RELOCATE_TLS_TP32_HI20): New macro. (loongarch_elf_check_relocs): Add new reloc support. (perform_relocation): Likewise. (loongarch_elf_relocate_section): Handle new relocs related to relax. (loongarch_elf_relax_section): Likewise. * elfxx-loongarch.c: (LOONGARCH_HOWTO (R_LARCH_TLS_LE_ADD_R)): New reloc how to type. (LOONGARCH_HOWTO (R_LARCH_TLS_LE_HI20_R)): Likewise. (LOONGARCH_HOWTO (R_LARCH_TLS_LE_LO12_R)): Likewise. * libbfd.h: Add relocs related to tls le relax. * reloc.c: Likewise. --- bfd/bfd-in2.h | 4 +++ bfd/elfnn-loongarch.c | 75 +++++++++++++++++++++++++++++++++++++++++++ bfd/elfxx-loongarch.c | 55 ++++++++++++++++++++++++++++--- bfd/libbfd.h | 3 ++ bfd/reloc.c | 7 ++++ 5 files changed, 139 insertions(+), 5 deletions(-) diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h index 782845926ea..c522fef5641 100644 --- a/bfd/bfd-in2.h +++ b/bfd/bfd-in2.h @@ -7473,11 +7473,15 @@ enum bfd_reloc_code_real BFD_RELOC_LARCH_TLS_DESC64_HI12, BFD_RELOC_LARCH_TLS_DESC_LD, BFD_RELOC_LARCH_TLS_DESC_CALL, + BFD_RELOC_LARCH_TLS_LE_HI20_R, + BFD_RELOC_LARCH_TLS_LE_ADD_R, + BFD_RELOC_LARCH_TLS_LE_LO12_R, BFD_RELOC_LARCH_TLS_LD_PCREL20_S2, BFD_RELOC_LARCH_TLS_GD_PCREL20_S2, BFD_RELOC_LARCH_TLS_DESC_PCREL20_S2, BFD_RELOC_UNUSED }; + typedef enum bfd_reloc_code_real bfd_reloc_code_real_type; reloc_howto_type *bfd_reloc_type_lookup diff --git a/bfd/elfnn-loongarch.c b/bfd/elfnn-loongarch.c index bd448cda453..9a0bcb011ac 100644 --- a/bfd/elfnn-loongarch.c +++ b/bfd/elfnn-loongarch.c @@ -858,6 +858,7 @@ loongarch_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, break; case R_LARCH_TLS_LE_HI20: + case R_LARCH_TLS_LE_HI20_R: case R_LARCH_SOP_PUSH_TLS_TPREL: if (!bfd_link_executable (info)) return false; @@ -2261,6 +2262,8 @@ perform_relocation (const Elf_Internal_Rela *rel, asection *input_section, case R_LARCH_GOT64_HI12: case R_LARCH_TLS_LE_HI20: case R_LARCH_TLS_LE_LO12: + case R_LARCH_TLS_LE_HI20_R: + case R_LARCH_TLS_LE_LO12_R: case R_LARCH_TLS_LE64_LO20: case R_LARCH_TLS_LE64_HI12: case R_LARCH_TLS_IE_PC_HI20: @@ -2303,6 +2306,7 @@ perform_relocation (const Elf_Internal_Rela *rel, asection *input_section, break; case R_LARCH_RELAX: + case R_LARCH_TLS_LE_ADD_R: break; default: @@ -2483,6 +2487,16 @@ loongarch_reloc_is_fatal (struct bfd_link_info *info, relocation += 0x1000; \ }) +/* Handle problems caused by symbol extensions in TLS LE, The processing + is similar to the macro RELOCATE_CALC_PC32_HI20 method. */ +#define RELOCATE_TLS_TP32_HI20(relocation) \ + ({ \ + bfd_vma __lo = (relocation) & ((bfd_vma)0xfff); \ + if (__lo > 0x7ff) \ + relocation += 0x800; \ + relocation = relocation & ~(bfd_vma)0xfff; \ + }) + /* For example: pc is 0x11000010000100, symbol is 0x1812348ffff812 offset = (0x1812348ffff812 & ~0xfff) - (0x11000010000100 & ~0xfff) = 0x712347ffff000 @@ -3481,6 +3495,13 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, break; + case R_LARCH_TLS_LE_HI20_R: + relocation -= elf_hash_table (info)->tls_sec->vma; + + RELOCATE_TLS_TP32_HI20 (relocation); + + break; + case R_LARCH_PCALA_LO12: /* Not support if sym_addr in 2k page edge. pcalau12i pc_hi20 (sym_addr) @@ -3651,6 +3672,7 @@ loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, case R_LARCH_TLS_LE_HI20: case R_LARCH_TLS_LE_LO12: + case R_LARCH_TLS_LE_LO12_R: case R_LARCH_TLS_LE64_LO20: case R_LARCH_TLS_LE64_HI12: BFD_ASSERT (resolved_local && elf_hash_table (info)->tls_sec); @@ -4089,6 +4111,52 @@ loongarch_relax_delete_bytes (bfd *abfd, return true; } +/* Relax tls le, mainly relax the process of getting TLS le symbolic addresses. + +before relax: after relax: + +lu12i.w $r12,%le_hi20_r (sym) ==> (instruction deleted). +add.d $r12,$r12,$r2,%le_add_r (sym) ==> (instruction deleted). +st/addi/ld.w $r13,$r12,%le_lo12_r (sym) ==> st/addi/ld.w $r13,$r2,%le_lo12_r (sym). */ +static bool +loongarch_relax_tls_le (bfd *abfd, asection *sec, + Elf_Internal_Rela *rel, + struct bfd_link_info *link_info, + bfd_vma symval) +{ + bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; + uint32_t insn = bfd_get (32, abfd, contents + rel->r_offset); + static uint32_t insn_rj,insn_rd; + symval = symval - elf_hash_table (link_info)->tls_sec->vma; + /* Whether the symbol offset is in the interval (offset < 0x800). */ + if (ELFNN_R_TYPE ((rel + 1)->r_info == R_LARCH_RELAX) && (symval < 0x800)) + { + switch (ELFNN_R_TYPE (rel->r_info)) + { + case R_LARCH_TLS_LE_HI20_R: + case R_LARCH_TLS_LE_ADD_R: + /* delete insn. */ + rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); + loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, 4, link_info); + break; + case R_LARCH_TLS_LE_LO12_R: + /* Change rj to $tp. */ + insn_rj = 0x2 << 5; + /* Get rd register. */ + insn_rd = insn & 0x1f; + /* Write symbol offset. */ + symval <<= 10; + /* Writes the modified instruction. */ + insn = insn & 0xffc00000; + insn = insn | symval | insn_rj | insn_rd; + bfd_put (32, abfd, insn, contents + rel->r_offset); + break; + default: + break; + } + } + return true; +} /* Relax pcalau12i,addi.d => pcaddi. */ static bool @@ -4518,6 +4586,13 @@ loongarch_elf_relax_section (bfd *abfd, asection *sec, rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); } break; + case R_LARCH_TLS_LE_HI20_R: + case R_LARCH_TLS_LE_LO12_R: + case R_LARCH_TLS_LE_ADD_R: + if (0 == info->relax_pass && (i + 2) <= sec->reloc_count) + loongarch_relax_tls_le (abfd, sec, rel, info, symval); + break; + case R_LARCH_PCALA_HI20: if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, diff --git a/bfd/elfxx-loongarch.c b/bfd/elfxx-loongarch.c index 4fe8cbff14c..2c40fb02872 100644 --- a/bfd/elfxx-loongarch.c +++ b/bfd/elfxx-loongarch.c @@ -1776,9 +1776,56 @@ static loongarch_reloc_howto_type loongarch_howto_table[] = NULL, /* adjust_reloc_bits. */ "desc_call"), /* larch_reloc_type_name. */ - LOONGARCH_EMPTY_HOWTO (121), - LOONGARCH_EMPTY_HOWTO (122), - LOONGARCH_EMPTY_HOWTO (123), + LOONGARCH_HOWTO (R_LARCH_TLS_LE_HI20_R, /* type (121). */ + 12, /* rightshift. */ + 4, /* size. */ + 20, /* bitsize. */ + false, /* pc_relative. */ + 5, /* bitpos. */ + complain_overflow_signed, /* complain_on_overflow. */ + bfd_elf_generic_reloc, /* special_function. */ + "R_LARCH_TLS_LE_HI20_R", /* name. */ + false, /* partial_inplace. */ + 0, /* src_mask. */ + 0x1ffffe0, /* dst_mask. */ + false, /* pcrel_offset. */ + BFD_RELOC_LARCH_TLS_LE_HI20_R, /* bfd_reloc_code_real_type. */ + reloc_bits, /* adjust_reloc_bits. */ + "le_hi20_r"), /* larch_reloc_type_name. */ + + LOONGARCH_HOWTO (R_LARCH_TLS_LE_ADD_R, /* type (122). */ + 0, /* rightshift. */ + 0, /* size. */ + 0, /* bitsize. */ + false, /* pc_relative. */ + 0, /* bitpos. */ + complain_overflow_dont, /* complain_on_overflow. */ + bfd_elf_generic_reloc, /* special_function. */ + "R_LARCH_TLS_LE_ADD_R", /* name. */ + false, /* partial_inplace. */ + 0, /* src_mask. */ + 0, /* dst_mask. */ + false, /* pcrel_offset. */ + BFD_RELOC_LARCH_TLS_LE_ADD_R, /* bfd_reloc_code_real_type. */ + NULL, /* adjust_reloc_bits. */ + "le_add_r"), /* larch_reloc_type_name. */ + + LOONGARCH_HOWTO (R_LARCH_TLS_LE_LO12_R, /* type (123). */ + 0, /* rightshift. */ + 4, /* size. */ + 12, /* bitsize. */ + false, /* pc_relative. */ + 10, /* bitpos. */ + complain_overflow_signed, /* complain_on_overflow. */ + bfd_elf_generic_reloc, /* special_function. */ + "R_LARCH_TLS_LE_LO12_R", /* name. */ + false, /* partial_inplace. */ + 0, /* src_mask. */ + 0x3ffc00, /* dst_mask. */ + false, /* pcrel_offset. */ + BFD_RELOC_LARCH_TLS_LE_LO12_R, /* bfd_reloc_code_real_type. */ + reloc_bits, /* adjust_reloc_bits. */ + "le_lo12_r"), /* larch_reloc_type_name. */ /* For pcaddi, ld_pc_hi20 + ld_pc_lo12 can relax to ld_pcrel20_s2. */ LOONGARCH_HOWTO (R_LARCH_TLS_LD_PCREL20_S2, /* type (124). */ @@ -1870,9 +1917,7 @@ reloc_howto_type * loongarch_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) { - /* BFD_ASSERT (ARRAY_SIZE (loongarch_howto_table) == R_LARCH_count); - */ /* Fast search for new reloc types. */ if (BFD_RELOC_LARCH_B16 <= code && code < BFD_RELOC_LARCH_RELAX) diff --git a/bfd/libbfd.h b/bfd/libbfd.h index 8dab44110a6..82ffd773513 100644 --- a/bfd/libbfd.h +++ b/bfd/libbfd.h @@ -3612,6 +3612,9 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@", "BFD_RELOC_LARCH_TLS_DESC64_HI12", "BFD_RELOC_LARCH_TLS_DESC_LD", "BFD_RELOC_LARCH_TLS_DESC_CALL", + "BFD_RELOC_LARCH_TLS_LE_HI20_R", + "BFD_RELOC_LARCH_TLS_LE_ADD_R", + "BFD_RELOC_LARCH_TLS_LE_LO12_R", "BFD_RELOC_LARCH_TLS_LD_PCREL20_S2", "BFD_RELOC_LARCH_TLS_GD_PCREL20_S2", "BFD_RELOC_LARCH_TLS_DESC_PCREL20_S2", diff --git a/bfd/reloc.c b/bfd/reloc.c index 6fd0f1fb547..1030bc37647 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -8324,6 +8324,13 @@ ENUMX ENUMX BFD_RELOC_LARCH_TLS_DESC_CALL +ENUMX + BFD_RELOC_LARCH_TLS_LE_HI20_R +ENUMX + BFD_RELOC_LARCH_TLS_LE_ADD_R +ENUMX + BFD_RELOC_LARCH_TLS_LE_LO12_R + ENUMX BFD_RELOC_LARCH_TLS_LD_PCREL20_S2 ENUMX -- 2.40.0