From patchwork Fri Dec 31 06:44:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: caiyinyu X-Patchwork-Id: 49422 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 0579B3858008 for ; Fri, 31 Dec 2021 06:47:31 +0000 (GMT) X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 4FAA7385843E for ; Fri, 31 Dec 2021 06:45:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 4FAA7385843E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=loongson.cn Received: from 5.5.5 (unknown [10.2.5.5]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxn9Pops5hVAMAAA--.150S7; Fri, 31 Dec 2021 14:45:02 +0800 (CST) From: caiyinyu To: libc-alpha@sourceware.org Subject: [PATCH v2 05/14] LoongArch: Thread-Local Storage Support Date: Fri, 31 Dec 2021 14:44:46 +0800 Message-Id: <20211231064455.1030051-6-caiyinyu@loongson.cn> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211231064455.1030051-1-caiyinyu@loongson.cn> References: <20211231064455.1030051-1-caiyinyu@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxn9Pops5hVAMAAA--.150S7 X-Coremail-Antispam: 1UD129KBjvJXoW3uw1kuFWDCw4kCF1xtr1kKrg_yoWDKry5pr Z8CFy5Gr48GF4xC34xW3W7ZF1rJan3uF1jkry3Wr4UAFsxK34rXrsF9F95WFWxCr4kC34Y vrZIvay7uan7JaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBS14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr 1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVCm-wCF04k20x vY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I 3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIx AIcVC0I7IYx2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF 0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87 Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfU0oGHUUUUU X-CM-SenderInfo: 5fdl5xhq1xqz5rrqw2lrqou0/ X-Spam-Status: No, score=-13.4 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, KAM_SHORT, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xuchenghua@loongson.cn, joseph_myers@mentor.com, caiyinyu@loongson.cn Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" This patch implements TLS support for LoongArch. We support all four standard TLS addressing modes (LE, IE, LD, and GD) when running on Linux via NPTL. --- sysdeps/loongarch/dl-tls.h | 46 +++++++++ sysdeps/loongarch/libc-tls.c | 32 ++++++ sysdeps/loongarch/nptl/tcb-offsets.sym | 6 ++ sysdeps/loongarch/nptl/tls.h | 138 +++++++++++++++++++++++++ sysdeps/loongarch/stackinfo.h | 33 ++++++ 5 files changed, 255 insertions(+) create mode 100644 sysdeps/loongarch/dl-tls.h create mode 100644 sysdeps/loongarch/libc-tls.c create mode 100644 sysdeps/loongarch/nptl/tcb-offsets.sym create mode 100644 sysdeps/loongarch/nptl/tls.h create mode 100644 sysdeps/loongarch/stackinfo.h diff --git a/sysdeps/loongarch/dl-tls.h b/sysdeps/loongarch/dl-tls.h new file mode 100644 index 0000000000..ee7d78a3e9 --- /dev/null +++ b/sysdeps/loongarch/dl-tls.h @@ -0,0 +1,46 @@ +/* Thread-local storage handling in the ELF dynamic linker. + Copyright (C) 2021 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 + . */ + +/* Type used for the representation of TLS information in the GOT. */ +typedef struct +{ + unsigned long int ti_module; + unsigned long int ti_offset; +} tls_index; + +/* The thread pointer points to the first static TLS block. */ +#define TLS_TP_OFFSET 0 + +/* Dynamic thread vector pointers point to the start of each + TLS block. */ +#define TLS_DTV_OFFSET 0 + +/* Compute the value for a GOTTPREL reloc. */ +#define TLS_TPREL_VALUE(sym_map, sym) \ + ((sym_map)->l_tls_offset + (sym)->st_value - TLS_TP_OFFSET) + +/* 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) diff --git a/sysdeps/loongarch/libc-tls.c b/sysdeps/loongarch/libc-tls.c new file mode 100644 index 0000000000..32e303ecd3 --- /dev/null +++ b/sysdeps/loongarch/libc-tls.c @@ -0,0 +1,32 @@ +/* Thread-local storage handling in the ELF dynamic linker. + Copyright (C) 2021 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 + +/* On LoongArch, linker optimizations are not required, so __tls_get_addr + can be called even in statically linked binaries. In this case module + must be always 1 and PT_TLS segment exist in the binary, otherwise it + would not link. */ + +void * +__tls_get_addr (tls_index *ti) +{ + dtv_t *dtv = THREAD_DTV (); + return (char *) dtv[1].pointer.val + GET_ADDR_OFFSET; +} diff --git a/sysdeps/loongarch/nptl/tcb-offsets.sym b/sysdeps/loongarch/nptl/tcb-offsets.sym new file mode 100644 index 0000000000..7d0c7596e8 --- /dev/null +++ b/sysdeps/loongarch/nptl/tcb-offsets.sym @@ -0,0 +1,6 @@ +#include +#include + +#define thread_offsetof(mem) (long)(offsetof (struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) + +MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) diff --git a/sysdeps/loongarch/nptl/tls.h b/sysdeps/loongarch/nptl/tls.h new file mode 100644 index 0000000000..3b17e0b7f5 --- /dev/null +++ b/sysdeps/loongarch/nptl/tls.h @@ -0,0 +1,138 @@ +/* Definition for thread-local data handling. + Copyright (C) 2021 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 _LOONGARCH_TLS_H +#define _LOONGARCH_TLS_H 1 + +#include + +#ifndef __ASSEMBLER__ +#include +#include +#include +#include + +register void *__thread_self asm("$tp"); /* FIXME */ +#define READ_THREAD_POINTER() ({ __thread_self; }) + +/* Get system call information. */ +#include + +/* The TP points to the start of the thread blocks. */ +#define TLS_DTV_AT_TP 1 +#define TLS_TCB_AT_TP 0 + +/* Get the thread descriptor definition. */ +#include + +typedef struct +{ + dtv_t *dtv; + void *private; +} tcbhead_t; + +/* This is the size of the initial TCB. Because our TCB is before the thread + pointer, we don't need this. */ +#define TLS_INIT_TCB_SIZE 0 + +/* Alignment requirements for the initial TCB. */ +#define TLS_INIT_TCB_ALIGN __alignof__(struct pthread) + +/* This is the size of the TCB. Because our TCB is before the thread + pointer, we don't need this. */ +#define TLS_TCB_SIZE 0 + +/* Alignment requirements for the TCB. */ +#define TLS_TCB_ALIGN __alignof__(struct pthread) + +/* This is the size we need before TCB - actually, it includes the TCB. */ +#define TLS_PRE_TCB_SIZE \ + (sizeof (struct pthread) \ + + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1))) + +/* The thread pointer tp points to the end of the TCB. + The pthread_descr structure is immediately in front of the TCB. */ +#define TLS_TCB_OFFSET 0 + +/* Install the dtv pointer. The pointer passed is to the element with + index -1 which contain the length. */ +#define INSTALL_DTV(tcbp, dtvp) (((tcbhead_t *) (tcbp))[-1].dtv = (dtvp) + 1) + +/* Install new dtv for current thread. */ +#define INSTALL_NEW_DTV(dtv) (THREAD_DTV () = (dtv)) + +/* Return dtv of given thread descriptor. */ +#define GET_DTV(tcbp) (((tcbhead_t *) (tcbp))[-1].dtv) + +/* Code to initially initialize the thread pointer. */ +#define TLS_INIT_TP(tcbp) \ + ({ \ + __thread_self = (char *) tcbp + TLS_TCB_OFFSET; \ + NULL; \ + }) + +/* Return the address of the dtv for the current thread. */ +#define THREAD_DTV() \ + (((tcbhead_t *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET))[-1].dtv) + +/* Return the thread descriptor for the current thread. */ +#define THREAD_SELF \ + ((struct pthread *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET \ + - TLS_PRE_TCB_SIZE)) + +/* Value passed to 'clone' for initialization of the thread register. */ +#define TLS_DEFINE_INIT_TP(tp, pd) \ + void *tp = (void *) (pd) + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE + +/* Informs libthread_db that the thread pointer is register 2, which is used + * to know how to do THREAD_SELF. */ +#define DB_THREAD_SELF \ + REGISTER (64, 64, 2 * 8, -TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) + +/* Access to data in the thread descriptor is easy. */ +# include + +/* l_tls_offset == 0 is perfectly valid, so we have to use some different + value to mean unset l_tls_offset. */ +#define NO_TLS_OFFSET -1 + +/* Get and set the global scope generation counter in struct pthread. */ +#define THREAD_GSCOPE_IN_TCB 1 +#define THREAD_GSCOPE_FLAG_UNUSED 0 +#define THREAD_GSCOPE_FLAG_USED 1 +#define THREAD_GSCOPE_FLAG_WAIT 2 +#define THREAD_GSCOPE_RESET_FLAG() \ + do \ + { \ + int __res = atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \ + THREAD_GSCOPE_FLAG_UNUSED); \ + if (__res == THREAD_GSCOPE_FLAG_WAIT) \ + lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \ + } \ + while (0) +#define THREAD_GSCOPE_SET_FLAG() \ + do \ + { \ + THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \ + atomic_write_barrier (); \ + } \ + while (0) + +#endif /* __ASSEMBLER__ */ + +#endif /* tls.h */ diff --git a/sysdeps/loongarch/stackinfo.h b/sysdeps/loongarch/stackinfo.h new file mode 100644 index 0000000000..a990a471f4 --- /dev/null +++ b/sysdeps/loongarch/stackinfo.h @@ -0,0 +1,33 @@ +/* Stack environment definitions for LoongArch. + Copyright (C) 2021 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 + . */ + +/* This file contains a bit of information about the stack allocation + of the processor. */ + +#ifndef _STACKINFO_H +#define _STACKINFO_H 1 + +#include + +/* On LoongArch the stack grows down. */ +#define _STACK_GROWS_DOWN 1 + +/* Default to a non-executable stack. */ +#define DEFAULT_STACK_PERMS (PF_R | PF_W) + +#endif /* stackinfo.h */