From patchwork Fri Mar 8 07:43:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: mengqinggang X-Patchwork-Id: 86952 X-Patchwork-Delegate: azanella@linux.vnet.ibm.com Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 094023858415 for ; Fri, 8 Mar 2024 07:44:31 +0000 (GMT) X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 1CAE33858D35 for ; Fri, 8 Mar 2024 07:44:02 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 1CAE33858D35 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 1CAE33858D35 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=1709883848; cv=none; b=xIxWQa7Ma6fEqXI5zh/8WqwjVSnBN6jz3CdgkCrGAhPNTQx51B+6Zfe7ZHMHG5uZc5YIxoxfD4W4zr9Cl86CrxQKVar1gEPfq8i5U3Pssu1p5H8WzbhodxRm5FisgocZQWtohFFlRVkgDDVZXp6HvKZ/ZEQcWPi5ucsMGSPiH+0= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1709883848; c=relaxed/simple; bh=AlXPRaK9jXZyQeaBpXGHHYzxl1RYEdBhmdl+O2UgYZc=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=Jml/JQiR//GTUL+YeK0NAcjPtEr8WeQC+4oPKb2IgSwdjgd8WG4s86/f3bxB41CIKwNuN8/KBDq9dr6nQmER8jAG3ja9egNryHsGiwPJvvTSTRkxsTW0g5Cq5mMWWFIBFsQzdsRjVlSSrbprIRc5wU6srD8UiwA3xOqp9gqbVA0= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from loongson.cn (unknown [10.2.6.5]) by gateway (Coremail) with SMTP id _____8Bxiei+weplmDYWAA--.35599S3; Fri, 08 Mar 2024 15:43:58 +0800 (CST) Received: from 5.5.5 (unknown [10.2.6.5]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxZMy6weplwRhRAA--.24717S2; Fri, 08 Mar 2024 15:43:54 +0800 (CST) From: mengqinggang To: libc-alpha@sourceware.org Cc: adhemerval.zanella@linaro.org, xuchenghua@loongson.cn, caiyinyu@loongson.cn, chenglulu@loongson.cn, cailulu@loongson.cn, xry111@xry111.site, i.swmail@xen0n.name, maskray@google.com, luweining@loongson.cn, wanglei@loongson.cn, hejinyang@loongson.cn, mengqinggang@loongson.cn, hjl.tools@gmail.com Subject: [PATCH v3] LoongArch: Add support for TLS Descriptors Date: Fri, 8 Mar 2024 15:43:53 +0800 Message-Id: <20240308074353.3627489-1-mengqinggang@loongson.cn> X-Mailer: git-send-email 2.39.3 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxZMy6weplwRhRAA--.24717S2 X-CM-SenderInfo: 5phqw15lqjwttqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBj9fXoWfArWktFyrZrWkur4ktr48Zrc_yoW8Kry3Jo WrCF9xKw18CayxGrZ8twnFvFZFgFWI9F12ya4fZr17CF15AayUGryfC3WrJrZrGrn7GFsx Gry5tFWkZay7Xr1Dl-sFpf9Il3svdjkaLaAFLSUrUUUU1b8apTn2vfkv8UJUUUU8wcxFpf 9Il3svdxBIdaVrn0xqx4xG64xvF2IEw4CE5I8CrVC2j2Jv73VFW2AGmfu7bjvjm3AaLaJ3 UjIYCTnIWjp_UUUYy7kC6x804xWl14x267AKxVWUJVW8JwAFc2x0x2IEx4CE42xK8VAvwI 8IcIk0rVWrJVCq3wAFIxvE14AKwVWUXVWUAwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xG Y2AK021l84ACjcxK6xIIjxv20xvE14v26r1I6r4UM28EF7xvwVC0I7IYx2IY6xkF7I0E14 v26r1j6r4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAF wI0_Gr1j6F4UJwAaw2AFwI0_Jrv_JF1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2 xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_ Jrv_JF1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x 0EwIxGrwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07C267AK xVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67 AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI 42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMI IF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVF xhVjvjDU0xZFpf9x07jepB-UUUUU= X-Spam-Status: No, score=-12.7 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, KAM_SHORT, 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: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org This is mostly based on AArch64 and RISC-V implementation. Add R_LARCH_TLS_DESC32 and R_LARCH_TLS_DESC64 relocations. For _dl_tlsdesc_dynamic function slow path, temporarily save and restore all vector registers. --- Changes v2 -> v3: - Remove _dl_tlsdesc_return_lasx, _dl_tlsdesc_return_lsx. Provide only one _dl_tlsdesc_dynamic implementation and check the required save/restore of vector register based on hwcap value. - Other details mentained by Adhemerval Zanella Netto, H.J. Lu and caiyinyu. Changes v1 -> v2: - Fix vr24-vr31, xr24-xr31 typo. - Save and restore max length float or vector registors in _dl_tlsdesc_dynamic. - Save and restore fcsr0 in _dl_tlsdesc_dynamic. v2 link: https://sourceware.org/pipermail/libc-alpha/2024-February/155068.html v1 link: https://sourceware.org/pipermail/libc-alpha/2023-December/153052.html elf/elf.h | 2 + sysdeps/loongarch/Makefile | 6 + sysdeps/loongarch/dl-machine.h | 52 ++- sysdeps/loongarch/dl-tls.h | 9 +- sysdeps/loongarch/dl-tlsdesc.S | 417 ++++++++++++++++++ sysdeps/loongarch/dl-tlsdesc.h | 49 ++ sysdeps/loongarch/linkmap.h | 3 +- sysdeps/loongarch/sys/asm.h | 1 + sysdeps/loongarch/sys/regdef.h | 1 + sysdeps/loongarch/tlsdesc.c | 39 ++ sysdeps/loongarch/tlsdesc.sym | 28 ++ .../unix/sysv/linux/loongarch/localplt.data | 2 + 12 files changed, 605 insertions(+), 4 deletions(-) create mode 100644 sysdeps/loongarch/dl-tlsdesc.S create mode 100644 sysdeps/loongarch/dl-tlsdesc.h create mode 100644 sysdeps/loongarch/tlsdesc.c create mode 100644 sysdeps/loongarch/tlsdesc.sym diff --git a/elf/elf.h b/elf/elf.h index f2206e5c06..eec24ea049 100644 --- a/elf/elf.h +++ b/elf/elf.h @@ -4237,6 +4237,8 @@ enum #define R_LARCH_TLS_TPREL32 10 #define R_LARCH_TLS_TPREL64 11 #define R_LARCH_IRELATIVE 12 +#define R_LARCH_TLS_DESC32 13 +#define R_LARCH_TLS_DESC64 14 /* Reserved for future relocs that the dynamic linker must understand. */ diff --git a/sysdeps/loongarch/Makefile b/sysdeps/loongarch/Makefile index 43d2f583cd..181389e787 100644 --- a/sysdeps/loongarch/Makefile +++ b/sysdeps/loongarch/Makefile @@ -3,9 +3,15 @@ sysdep_headers += sys/asm.h endif ifeq ($(subdir),elf) +sysdep-dl-routines += tlsdesc dl-tlsdesc gen-as-const-headers += dl-link.sym endif +ifeq ($(subdir),csu) +gen-as-const-headers += tlsdesc.sym +endif + + # LoongArch's assembler also needs to know about PIC as it changes the # definition of some assembler macros. ASFLAGS-.os += $(pic-ccflag) diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h index ab81b82d95..0e22337183 100644 --- a/sysdeps/loongarch/dl-machine.h +++ b/sysdeps/loongarch/dl-machine.h @@ -25,7 +25,7 @@ #include #include #include -#include +#include #include #include @@ -187,6 +187,36 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend; break; + case __WORDSIZE == 64 ? R_LARCH_TLS_DESC64 : R_LARCH_TLS_DESC32: + { + struct tlsdesc volatile *td = (struct tlsdesc volatile *)addr_field; + if (sym == NULL) + { + td->arg = (void*)reloc->r_addend; + td->entry = _dl_tlsdesc_undefweak; + } + else + { +# ifndef SHARED + CHECK_STATIC_TLS (map, sym_map); +# else + if (!TRY_STATIC_TLS (map, sym_map)) + { + td->arg = _dl_make_tlsdesc_dynamic (sym_map, + sym->st_value + reloc->r_addend); + td->entry = _dl_tlsdesc_dynamic; + } + else +# endif + { + td->arg = (void *)(TLS_TPREL_VALUE (sym_map, sym) + + reloc->r_addend); + td->entry = _dl_tlsdesc_return; + } + } + break; + } + case R_LARCH_COPY: { if (sym == NULL) @@ -255,6 +285,26 @@ elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], else *reloc_addr = map->l_mach.plt; } + else if (__glibc_likely (r_type == R_LARCH_TLS_DESC64) + || __glibc_likely (r_type == R_LARCH_TLS_DESC32)) + { + const Elf_Symndx symndx = ELFW (R_SYM) (reloc->r_info); + const ElfW (Sym) *symtab = (const void *)D_PTR (map, l_info[DT_SYMTAB]); + const ElfW (Sym) *sym = &symtab[symndx]; + const struct r_found_version *version = NULL; + + if (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL) + { + const ElfW (Half) *vernum = (const void *)D_PTR (map, + l_info[VERSYMIDX (DT_VERSYM)]); + version = &map->l_versions[vernum[symndx] & 0x7fff]; + } + + /* Always initialize TLS descriptors completely, because lazy + initialization requires synchronization at every TLS access. */ + elf_machine_rela (map, scope, reloc, sym, version, reloc_addr, + skip_ifunc); + } else _dl_reloc_bad_type (map, r_type, 1); } diff --git a/sysdeps/loongarch/dl-tls.h b/sysdeps/loongarch/dl-tls.h index 29924b866d..de593c002d 100644 --- a/sysdeps/loongarch/dl-tls.h +++ b/sysdeps/loongarch/dl-tls.h @@ -16,6 +16,9 @@ License along with the GNU C Library. If not, see . */ +#ifndef _DL_TLS_H +#define _DL_TLS_H + /* Type used for the representation of TLS information in the GOT. */ typedef struct { @@ -23,6 +26,8 @@ typedef struct unsigned long int ti_offset; } tls_index; +extern void *__tls_get_addr (tls_index *ti); + /* The thread pointer points to the first static TLS block. */ #define TLS_TP_OFFSET 0 @@ -37,10 +42,10 @@ typedef struct /* Compute the value for a DTPREL reloc. */ #define TLS_DTPREL_VALUE(sym) ((sym)->st_value - TLS_DTV_OFFSET) -extern void *__tls_get_addr (tls_index *ti); - #define GET_ADDR_OFFSET (ti->ti_offset + TLS_DTV_OFFSET) #define __TLS_GET_ADDR(__ti) (__tls_get_addr (__ti) - TLS_DTV_OFFSET) /* Value used for dtv entries for which the allocation is delayed. */ #define TLS_DTV_UNALLOCATED ((void *) -1l) + +#endif diff --git a/sysdeps/loongarch/dl-tlsdesc.S b/sysdeps/loongarch/dl-tlsdesc.S new file mode 100644 index 0000000000..34028e988b --- /dev/null +++ b/sysdeps/loongarch/dl-tlsdesc.S @@ -0,0 +1,417 @@ +/* Thread-local storage handling in the ELF dynamic linker. + LoongArch version. + Copyright (C) 2011-2024 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include "tlsdesc.h" + + .text + + /* Compute the thread pointer offset for symbols in the static + TLS block. The offset is the same for all threads. + Prototype: + _dl_tlsdesc_return (tlsdesc *); */ + .hidden _dl_tlsdesc_return + .global _dl_tlsdesc_return + .type _dl_tlsdesc_return,%function + cfi_startproc + .align 2 +_dl_tlsdesc_return: + REG_L a0, a0, 8 + RET + cfi_endproc + .size _dl_tlsdesc_return, .-_dl_tlsdesc_return + + /* Handler for undefined weak TLS symbols. + Prototype: + _dl_tlsdesc_undefweak (tlsdesc *); + + The second word of the descriptor contains the addend. + Return the addend minus the thread pointer. This ensures + that when the caller adds on the thread pointer it gets back + the addend. */ + .hidden _dl_tlsdesc_undefweak + .global _dl_tlsdesc_undefweak + .type _dl_tlsdesc_undefweak,%function + cfi_startproc + .align 2 +_dl_tlsdesc_undefweak: + REG_L a0, a0, 8 + sub.d a0, a0, tp + RET + cfi_endproc + .size _dl_tlsdesc_undefweak, .-_dl_tlsdesc_undefweak + + +#ifdef SHARED + +#define FRAME_SIZE (-((-13 * SZREG) & ALMASK)) +#define FRAME_SIZE_LSX (-((-32 * SZVREG) & ALMASK)) +#define FRAME_SIZE_LASX (-((-32 * SZXREG) & ALMASK)) +#define FRAME_SIZE_FLOAT (-((-24 * SZFREG) & ALMASK)) + + /* Handler for dynamic TLS symbols. + Prototype: + _dl_tlsdesc_dynamic (tlsdesc *) ; + + The second word of the descriptor points to a + tlsdesc_dynamic_arg structure. + + Returns the offset between the thread pointer and the + object referenced by the argument. + + ptrdiff_t + _dl_tlsdesc_dynamic (struct tlsdesc *tdp) + { + struct tlsdesc_dynamic_arg *td = tdp->arg; + dtv_t *dtv = *(dtv_t **)((char *)__thread_pointer + TCBHEAD_DTV); + if (__glibc_likely (td->gen_count <= dtv[0].counter + && (dtv[td->tlsinfo.ti_module].pointer.val + != TLS_DTV_UNALLOCATED), + 1)) + return dtv[td->tlsinfo.ti_module].pointer.val + + td->tlsinfo.ti_offset + - __thread_pointer; + + return ___tls_get_addr (&td->tlsinfo) - __thread_pointer; + } */ + .hidden _dl_tlsdesc_dynamic + .global _dl_tlsdesc_dynamic + .type _dl_tlsdesc_dynamic,%function + cfi_startproc + .align 2 +_dl_tlsdesc_dynamic: + /* Save just enough registers to support fast path, if we fall + into slow path we will save additional registers. */ + ADDI sp, sp,-24 + REG_S t0, sp, 0 + REG_S t1, sp, 8 + REG_S t2, sp, 16 + + REG_L t0, tp, -SIZE_OF_DTV /* dtv(t0) = tp + TCBHEAD_DTV dtv start */ + REG_L a0, a0, TLSDESC_ARG /* td(a0) = tdp->arg */ + REG_L t1, a0, TLSDESC_GEN_COUNT /* t1 = td->gen_count */ + REG_L t2, t0, DTV_COUNTER /* t2 = dtv[0].counter */ + bltu t2, t1, .Lslow + + REG_L t1, a0, TLSDESC_MODID /* t1 = td->tlsinfo.ti_module */ + slli.d t1, t1, 3 + 1 /* sizeof(dtv_t) == sizeof(void*) * 2 */ + add.d t1, t1, t0 /* t1 = dtv + ti_module * sizeof(dtv_t) */ + REG_L t1, t1, 0 /* t1 = dtv[td->tlsinfo.ti_module].pointer.val */ + li.d t2, TLS_DTV_UNALLOCATED + beq t1, t2, .Lslow + REG_L t2, a0, TLSDESC_MODOFF /* t2 = td->tlsinfo.ti_offset */ + /* dtv[td->tlsinfo.ti_module].pointer.val + td->tlsinfo.ti_offset */ + add.d a0, t1, t2 +.Lret: + sub.d a0, a0, tp + REG_L t0, sp, 0 + REG_L t1, sp, 8 + REG_L t2, sp, 16 + ADDI sp, sp, 24 + RET + +.Lslow: + /* This is the slow path. We need to call __tls_get_addr() which + means we need to save and restore all the register that the + callee will trash. */ + + /* Save the remaining registers that we must treat as caller save. */ + ADDI sp, sp, -FRAME_SIZE + REG_S ra, sp, 0 * SZREG + REG_S a1, sp, 1 * SZREG + REG_S a2, sp, 2 * SZREG + REG_S a3, sp, 3 * SZREG + REG_S a4, sp, 4 * SZREG + REG_S a5, sp, 5 * SZREG + REG_S a6, sp, 6 * SZREG + REG_S a7, sp, 7 * SZREG + REG_S t4, sp, 8 * SZREG + REG_S t5, sp, 9 * SZREG + REG_S t6, sp, 10 * SZREG + REG_S t7, sp, 11 * SZREG + REG_S t8, sp, 12 * SZREG + +#ifndef __loongarch_soft_float + + /* Save fcsr0 register. + Only one physical fcsr0 register, fcsr1-fcsr3 are aliases + of some fields in fcsr0. */ + ADDI sp, sp, -SZFCSREG + movfcsr2gr t0, fcsr0 + st.w t0, sp, 0 + + /* Whether support LASX. */ + la.global t0, _rtld_global_ro + REG_L t0, t0, GLRO_DL_HWCAP_OFFSET + andi t0, t0, HWCAP_LOONGARCH_LASX + beqz t0, .Llsx + + /* Save 256-bit vector registers. + FIXME: Without vector ABI, save all vector registers. */ + ADDI sp, sp, -FRAME_SIZE_LASX + xvst xr0, sp, 0*SZXREG + xvst xr1, sp, 1*SZXREG + xvst xr2, sp, 2*SZXREG + xvst xr3, sp, 3*SZXREG + xvst xr4, sp, 4*SZXREG + xvst xr5, sp, 5*SZXREG + xvst xr6, sp, 6*SZXREG + xvst xr7, sp, 7*SZXREG + xvst xr8, sp, 8*SZXREG + xvst xr9, sp, 9*SZXREG + xvst xr10, sp, 10*SZXREG + xvst xr11, sp, 11*SZXREG + xvst xr12, sp, 12*SZXREG + xvst xr13, sp, 13*SZXREG + xvst xr14, sp, 14*SZXREG + xvst xr15, sp, 15*SZXREG + xvst xr16, sp, 16*SZXREG + xvst xr17, sp, 17*SZXREG + xvst xr18, sp, 18*SZXREG + xvst xr19, sp, 19*SZXREG + xvst xr20, sp, 20*SZXREG + xvst xr21, sp, 21*SZXREG + xvst xr22, sp, 22*SZXREG + xvst xr23, sp, 23*SZXREG + xvst xr24, sp, 24*SZXREG + xvst xr25, sp, 25*SZXREG + xvst xr26, sp, 26*SZXREG + xvst xr27, sp, 27*SZXREG + xvst xr28, sp, 28*SZXREG + xvst xr29, sp, 29*SZXREG + xvst xr30, sp, 30*SZXREG + xvst xr31, sp, 31*SZXREG + b .Ltga + +.Llsx: + /* Whether support LSX. */ + andi t0, t0, HWCAP_LOONGARCH_LSX + beqz t0, .Lfloat + + /* Save 128-bit vector registers. */ + ADDI sp, sp, -FRAME_SIZE_LSX + vst vr0, sp, 0*SZVREG + vst vr1, sp, 1*SZVREG + vst vr2, sp, 2*SZVREG + vst vr3, sp, 3*SZVREG + vst vr4, sp, 4*SZVREG + vst vr5, sp, 5*SZVREG + vst vr6, sp, 6*SZVREG + vst vr7, sp, 7*SZVREG + vst vr8, sp, 8*SZVREG + vst vr9, sp, 9*SZVREG + vst vr10, sp, 10*SZVREG + vst vr11, sp, 11*SZVREG + vst vr12, sp, 12*SZVREG + vst vr13, sp, 13*SZVREG + vst vr14, sp, 14*SZVREG + vst vr15, sp, 15*SZVREG + vst vr16, sp, 16*SZVREG + vst vr17, sp, 17*SZVREG + vst vr18, sp, 18*SZVREG + vst vr19, sp, 19*SZVREG + vst vr20, sp, 20*SZVREG + vst vr21, sp, 21*SZVREG + vst vr22, sp, 22*SZVREG + vst vr23, sp, 23*SZVREG + vst vr24, sp, 24*SZVREG + vst vr25, sp, 25*SZVREG + vst vr26, sp, 26*SZVREG + vst vr27, sp, 27*SZVREG + vst vr28, sp, 28*SZVREG + vst vr29, sp, 29*SZVREG + vst vr30, sp, 30*SZVREG + vst vr31, sp, 31*SZVREG + b .Ltga + +.Lfloat: + /* Save float registers. */ + ADDI sp, sp, -FRAME_SIZE_FLOAT + FREG_S fa0, sp, 0*SZFREG + FREG_S fa1, sp, 1*SZFREG + FREG_S fa2, sp, 2*SZFREG + FREG_S fa3, sp, 3*SZFREG + FREG_S fa4, sp, 4*SZFREG + FREG_S fa5, sp, 5*SZFREG + FREG_S fa6, sp, 6*SZFREG + FREG_S fa7, sp, 7*SZFREG + FREG_S ft0, sp, 8*SZFREG + FREG_S ft1, sp, 9*SZFREG + FREG_S ft2, sp, 10*SZFREG + FREG_S ft3, sp, 11*SZFREG + FREG_S ft4, sp, 12*SZFREG + FREG_S ft5, sp, 13*SZFREG + FREG_S ft6, sp, 14*SZFREG + FREG_S ft7, sp, 15*SZFREG + FREG_S ft8, sp, 16*SZFREG + FREG_S ft9, sp, 17*SZFREG + FREG_S ft10, sp, 18*SZFREG + FREG_S ft11, sp, 19*SZFREG + FREG_S ft12, sp, 20*SZFREG + FREG_S ft13, sp, 21*SZFREG + FREG_S ft14, sp, 22*SZFREG + FREG_S ft15, sp, 23*SZFREG + +#endif /* #ifndef __loongarch_soft_float */ + +.Ltga: + bl __tls_get_addr + ADDI a0, a0, -TLS_DTV_OFFSET + +#ifndef __loongarch_soft_float + + la.global t0, _rtld_global_ro + REG_L t0, t0, GLRO_DL_HWCAP_OFFSET + andi t0, t0, HWCAP_LOONGARCH_LASX + beqz t0, .Llsx1 + + /* Restore 256-bit vector registers. */ + xvld xr0, sp, 0*SZXREG + xvld xr1, sp, 1*SZXREG + xvld xr2, sp, 2*SZXREG + xvld xr3, sp, 3*SZXREG + xvld xr4, sp, 4*SZXREG + xvld xr5, sp, 5*SZXREG + xvld xr6, sp, 6*SZXREG + xvld xr7, sp, 7*SZXREG + xvld xr8, sp, 8*SZXREG + xvld xr9, sp, 9*SZXREG + xvld xr10, sp, 10*SZXREG + xvld xr11, sp, 11*SZXREG + xvld xr12, sp, 12*SZXREG + xvld xr13, sp, 13*SZXREG + xvld xr14, sp, 14*SZXREG + xvld xr15, sp, 15*SZXREG + xvld xr16, sp, 16*SZXREG + xvld xr17, sp, 17*SZXREG + xvld xr18, sp, 18*SZXREG + xvld xr19, sp, 19*SZXREG + xvld xr20, sp, 20*SZXREG + xvld xr21, sp, 21*SZXREG + xvld xr22, sp, 22*SZXREG + xvld xr23, sp, 23*SZXREG + xvld xr24, sp, 24*SZXREG + xvld xr25, sp, 25*SZXREG + xvld xr26, sp, 26*SZXREG + xvld xr27, sp, 27*SZXREG + xvld xr28, sp, 28*SZXREG + xvld xr29, sp, 29*SZXREG + xvld xr30, sp, 30*SZXREG + xvld xr31, sp, 31*SZXREG + ADDI sp, sp, FRAME_SIZE_LASX + b .Lfcsr + +.Llsx1: + andi t0, s0, HWCAP_LOONGARCH_LSX + beqz t0, .Lfloat1 + + /* Restore 128-bit vector registers. */ + vld vr0, sp, 0*SZVREG + vld vr1, sp, 1*SZVREG + vld vr2, sp, 2*SZVREG + vld vr3, sp, 3*SZVREG + vld vr4, sp, 4*SZVREG + vld vr5, sp, 5*SZVREG + vld vr6, sp, 6*SZVREG + vld vr7, sp, 7*SZVREG + vld vr8, sp, 8*SZVREG + vld vr9, sp, 9*SZVREG + vld vr10, sp, 10*SZVREG + vld vr11, sp, 11*SZVREG + vld vr12, sp, 12*SZVREG + vld vr13, sp, 13*SZVREG + vld vr14, sp, 14*SZVREG + vld vr15, sp, 15*SZVREG + vld vr16, sp, 16*SZVREG + vld vr17, sp, 17*SZVREG + vld vr18, sp, 18*SZVREG + vld vr19, sp, 19*SZVREG + vld vr20, sp, 20*SZVREG + vld vr21, sp, 21*SZVREG + vld vr22, sp, 22*SZVREG + vld vr23, sp, 23*SZVREG + vld vr24, sp, 24*SZVREG + vld vr25, sp, 25*SZVREG + vld vr26, sp, 26*SZVREG + vld vr27, sp, 27*SZVREG + vld vr28, sp, 28*SZVREG + vld vr29, sp, 29*SZVREG + vld vr30, sp, 30*SZVREG + vld vr31, sp, 31*SZVREG + ADDI sp, sp, FRAME_SIZE_LSX + b .Lfcsr + +.Lfloat1: + /* Restore float registers. */ + FREG_L fa0, sp, 0*SZFREG + FREG_L fa1, sp, 1*SZFREG + FREG_L fa2, sp, 2*SZFREG + FREG_L fa3, sp, 3*SZFREG + FREG_L fa4, sp, 4*SZFREG + FREG_L fa5, sp, 5*SZFREG + FREG_L fa6, sp, 6*SZFREG + FREG_L fa7, sp, 7*SZFREG + FREG_L ft0, sp, 8*SZFREG + FREG_L ft1, sp, 9*SZFREG + FREG_L ft2, sp, 10*SZFREG + FREG_L ft3, sp, 11*SZFREG + FREG_L ft4, sp, 12*SZFREG + FREG_L ft5, sp, 13*SZFREG + FREG_L ft6, sp, 14*SZFREG + FREG_L ft7, sp, 15*SZFREG + FREG_L ft8, sp, 16*SZFREG + FREG_L ft9, sp, 17*SZFREG + FREG_L ft10, sp, 18*SZFREG + FREG_L ft11, sp, 19*SZFREG + FREG_L ft12, sp, 20*SZFREG + FREG_L ft13, sp, 21*SZFREG + FREG_L ft14, sp, 22*SZFREG + FREG_L ft15, sp, 23*SZFREG + ADDI sp, sp, FRAME_SIZE_FLOAT + +.Lfcsr: + /* Restore fcsr0 register. */ + ld.w t0, sp, 0 + movgr2fcsr fcsr0, t0 + ADDI sp, sp, SZFCSREG + +#endif /* #ifndef __loongarch_soft_float */ + + REG_L ra, sp, 0 + REG_L a1, sp, 1 * 8 + REG_L a2, sp, 2 * 8 + REG_L a3, sp, 3 * 8 + REG_L a4, sp, 4 * 8 + REG_L a5, sp, 5 * 8 + REG_L a6, sp, 6 * 8 + REG_L a7, sp, 7 * 8 + REG_L t4, sp, 8 * 8 + REG_L t5, sp, 9 * 8 + REG_L t6, sp, 10 * 8 + REG_L t7, sp, 11 * 8 + REG_L t8, sp, 12 * 8 + ADDI sp, sp, FRAME_SIZE + + b .Lret + cfi_endproc + .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic + +#endif /* #ifdef SHARED */ diff --git a/sysdeps/loongarch/dl-tlsdesc.h b/sysdeps/loongarch/dl-tlsdesc.h new file mode 100644 index 0000000000..7444dac520 --- /dev/null +++ b/sysdeps/loongarch/dl-tlsdesc.h @@ -0,0 +1,49 @@ +/* Thread-local storage descriptor handling in the ELF dynamic linker. + LoongArch version. + Copyright (C) 2011-2023 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _DL_TLSDESC_H +#define _DL_TLSDESC_H + +#include + +/* Type used to represent a TLS descriptor in the GOT. */ +struct tlsdesc +{ + ptrdiff_t (*entry) (struct tlsdesc *); + void *arg; +}; + +/* Type used as the argument in a TLS descriptor for a symbol that + needs dynamic TLS offsets. */ +struct tlsdesc_dynamic_arg +{ + tls_index tlsinfo; + size_t gen_count; +}; + +extern ptrdiff_t attribute_hidden _dl_tlsdesc_return (struct tlsdesc *); +extern ptrdiff_t attribute_hidden _dl_tlsdesc_undefweak (struct tlsdesc *); + +#ifdef SHARED +extern void *_dl_make_tlsdesc_dynamic (struct link_map *, size_t); +extern ptrdiff_t attribute_hidden _dl_tlsdesc_dynamic (struct tlsdesc *); +#endif + +#endif diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h index 4d8737ee7f..833dc9eb82 100644 --- a/sysdeps/loongarch/linkmap.h +++ b/sysdeps/loongarch/linkmap.h @@ -18,5 +18,6 @@ struct link_map_machine { - ElfW (Addr) plt; /* Address of .plt. */ + ElfW (Addr) plt; /* Address of .plt. */ + void *tlsdesc_table; /* Address of TLS descriptor hash table. */ }; diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h index 51521a7eb4..23c1d12914 100644 --- a/sysdeps/loongarch/sys/asm.h +++ b/sysdeps/loongarch/sys/asm.h @@ -25,6 +25,7 @@ /* Macros to handle different pointer/register sizes for 32/64-bit code. */ #define SZREG 8 #define SZFREG 8 +#define SZFCSREG 4 #define SZVREG 16 #define SZXREG 32 #define REG_L ld.d diff --git a/sysdeps/loongarch/sys/regdef.h b/sysdeps/loongarch/sys/regdef.h index f61ee25b25..80ce3e9c00 100644 --- a/sysdeps/loongarch/sys/regdef.h +++ b/sysdeps/loongarch/sys/regdef.h @@ -97,6 +97,7 @@ #define fcc5 $fcc5 #define fcc6 $fcc6 #define fcc7 $fcc7 +#define fcsr0 $fcsr0 #define vr0 $vr0 #define vr1 $vr1 diff --git a/sysdeps/loongarch/tlsdesc.c b/sysdeps/loongarch/tlsdesc.c new file mode 100644 index 0000000000..4a3d5d22ef --- /dev/null +++ b/sysdeps/loongarch/tlsdesc.c @@ -0,0 +1,39 @@ +/* Manage TLS descriptors. LoongArch64 version. + + Copyright (C) 2011-2024 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#include + +/* Unmap the dynamic object, but also release its TLS descriptor table + if there is one. */ + +void +_dl_unmap (struct link_map *map) +{ + _dl_unmap_segments (map); + +#ifdef SHARED + if (map->l_mach.tlsdesc_table) + htab_delete (map->l_mach.tlsdesc_table); +#endif +} diff --git a/sysdeps/loongarch/tlsdesc.sym b/sysdeps/loongarch/tlsdesc.sym new file mode 100644 index 0000000000..a0b945e449 --- /dev/null +++ b/sysdeps/loongarch/tlsdesc.sym @@ -0,0 +1,28 @@ +#include +#include +#include +#include +#include + +#define SHARED 1 + +#include + +#define GLRO_offsetof(name) offsetof (struct rtld_global_ro, _##name) + +-- + +-- Abuse tls.h macros to derive offsets relative to the thread register. + +TLSDESC_ARG offsetof(struct tlsdesc, arg) +TLSDESC_GEN_COUNT offsetof(struct tlsdesc_dynamic_arg, gen_count) +TLSDESC_MODID offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_module) +TLSDESC_MODOFF offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_offset) +TCBHEAD_DTV offsetof(tcbhead_t, dtv) +DTV_COUNTER offsetof(dtv_t, counter) +TLS_DTV_UNALLOCATED TLS_DTV_UNALLOCATED +TLS_DTV_OFFSET TLS_DTV_OFFSET +SIZE_OF_DTV sizeof(tcbhead_t) +GLRO_DL_HWCAP_OFFSET GLRO_offsetof (dl_hwcap) +HWCAP_LOONGARCH_LSX HWCAP_LOONGARCH_LSX +HWCAP_LOONGARCH_LASX HWCAP_LOONGARCH_LASX diff --git a/sysdeps/unix/sysv/linux/loongarch/localplt.data b/sysdeps/unix/sysv/linux/loongarch/localplt.data index 547b1c1b7f..ec32e6d13f 100644 --- a/sysdeps/unix/sysv/linux/loongarch/localplt.data +++ b/sysdeps/unix/sysv/linux/loongarch/localplt.data @@ -5,3 +5,5 @@ libc.so: calloc libc.so: free libc.so: malloc libc.so: realloc +# The dynamic loader needs __tls_get_addr for TLS. +ld.so: __tls_get_addr