This includes all 4 TLS addressing models --- sysdeps/arc/dl-tls.h | 30 +++++++ sysdeps/arc/libc-tls.c | 27 ++++++ sysdeps/arc/nptl/tcb-offsets.sym | 11 +++ sysdeps/arc/nptl/tls.h | 148 +++++++++++++++++++++++++++++++ sysdeps/arc/stackinfo.h | 33 +++++++ 5 files changed, 249 insertions(+) create mode 100644 sysdeps/arc/dl-tls.h create mode 100644 sysdeps/arc/libc-tls.c create mode 100644 sysdeps/arc/nptl/tcb-offsets.sym create mode 100644 sysdeps/arc/nptl/tls.h create mode 100644 sysdeps/arc/stackinfo.h diff --git a/sysdeps/arc/dl-tls.h b/sysdeps/arc/dl-tls.h new file mode 100644 index 000000000000..0f3626d197c9 --- /dev/null +++ b/sysdeps/arc/dl-tls.h @@ -0,0 +1,30 @@ +/* Thread-local storage handling in the ELF dynamic linker. ARC version. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + + +/* 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; + +extern void *__tls_get_addr (tls_index *ti); + +/* Value used for dtv entries for which the allocation is delayed. */ +#define TLS_DTV_UNALLOCATED ((void *) -1l) diff --git a/sysdeps/arc/libc-tls.c b/sysdeps/arc/libc-tls.c new file mode 100644 index 000000000000..234932c29512 --- /dev/null +++ b/sysdeps/arc/libc-tls.c @@ -0,0 +1,27 @@ +/* Thread-local storage handling in the ELF dynamic linker. ARC version. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <csu/libc-tls.c> +#include <dl-tls.h> + +void * +__tls_get_addr (tls_index *ti) +{ + dtv_t *dtv = THREAD_DTV (); + return (char *) dtv[1].pointer.val + ti->ti_offset; +} diff --git a/sysdeps/arc/nptl/tcb-offsets.sym b/sysdeps/arc/nptl/tcb-offsets.sym new file mode 100644 index 000000000000..64c432c22e76 --- /dev/null +++ b/sysdeps/arc/nptl/tcb-offsets.sym @@ -0,0 +1,11 @@ +#include <sysdep.h> +#include <tls.h> + +-- Derive offsets relative to the thread register. +#define thread_offsetof(mem) (long)(offsetof (struct pthread, mem) - sizeof (struct pthread)) + +MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) +TLS_PRE_TCB_SIZE sizeof (struct pthread) +TLS_TCB_SIZE sizeof (tcbhead_t) + +PTHREAD_TID offsetof (struct pthread, tid) diff --git a/sysdeps/arc/nptl/tls.h b/sysdeps/arc/nptl/tls.h new file mode 100644 index 000000000000..881221e27c1a --- /dev/null +++ b/sysdeps/arc/nptl/tls.h @@ -0,0 +1,148 @@ +/* Definition for thread-local data handling. NPTL/ARC version. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _ARC_NPTL_TLS_H +#define _ARC_NPTL_TLS_H 1 + +#include <dl-sysdep.h> + +#ifndef __ASSEMBLER__ +# include <stdbool.h> +# include <stddef.h> +# include <stdint.h> + +#include <dl-dtv.h> + +/* Get system call information. */ +# include <sysdep.h> + +/* The TLS blocks start right after the TCB. */ +# define TLS_DTV_AT_TP 1 +# define TLS_TCB_AT_TP 0 + +/* Get the thread descriptor definition. */ +# include <nptl/descr.h> + +typedef struct +{ + dtv_t *dtv; + uintptr_t pointer_guard; +} tcbhead_t; + +/* This is the size of the initial TCB. */ +# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) + +/* Alignment requirements for the initial TCB. */ +# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread) + +/* This is the size of the TCB. */ +#ifndef TLS_TCB_SIZE +# define TLS_TCB_SIZE sizeof (tcbhead_t) +#endif + +/* Alignment requirements for the TCB. */ +# define TLS_TCB_ALIGN __alignof__ (struct pthread) + +/* This is the size we need before TCB. */ +# define TLS_PRE_TCB_SIZE sizeof (struct pthread) + +/* 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))->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))->dtv) + +/* Code to initially initialize the thread pointer. */ +# define TLS_INIT_TP(tcbp) \ + ({ \ + long result_var; \ + __builtin_set_thread_pointer (tcbp); \ + result_var = INTERNAL_SYSCALL (arc_settls, 1, (tcbp)); \ + INTERNAL_SYSCALL_ERROR_P (result_var) \ + ? "settls syscall error" : NULL; \ + }) + +/* Value passed to 'clone' for initialization of the thread register. */ +# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1 + +/* Return the address of the dtv for the current thread. */ +# define THREAD_DTV() \ + (((tcbhead_t *) __builtin_thread_pointer ())->dtv) + +/* Return the thread descriptor for the current thread. */ +# define THREAD_SELF \ + ((struct pthread *)__builtin_thread_pointer () - 1) + +/* Magic for libthread_db to know how to do THREAD_SELF. */ +# define DB_THREAD_SELF \ + CONST_THREAD_AREA (32, sizeof (struct pthread)) + +/* Access to data in the thread descriptor is easy. */ +# define THREAD_GETMEM(descr, member) \ + descr->member +# define THREAD_GETMEM_NC(descr, member, idx) \ + descr->member[idx] +# define THREAD_SETMEM(descr, member, value) \ + descr->member = (value) +# define THREAD_SETMEM_NC(descr, member, idx, value) \ + descr->member[idx] = (value) + +/* 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) +#define THREAD_GSCOPE_WAIT() \ + GL(dl_wait_lookup_done) () + +#else + +# include <tcb-offsets.h> + +# r25 is dedicated TLS register for ARC +.macro THREAD_SELF reg + # struct pthread is just ahead of TCB + sub \reg, r25, TLS_PRE_TCB_SIZE +.endm + +#endif /* __ASSEMBLER__ */ + +#endif /* tls.h */ diff --git a/sysdeps/arc/stackinfo.h b/sysdeps/arc/stackinfo.h new file mode 100644 index 000000000000..02ae1cd8c425 --- /dev/null +++ b/sysdeps/arc/stackinfo.h @@ -0,0 +1,33 @@ +/* Stack environment definitions for ARC. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +/* This file contains a bit of information about the stack allocation + of the processor. */ + +#ifndef _STACKINFO_H +#define _STACKINFO_H 1 + +#include <elf.h> + +/* On ARC 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 */ -- 2.20.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-snps-arc
