diff options
| -rw-r--r-- | sysdeps/loongarch/dl-tls.h | 46 | ||||
| -rw-r--r-- | sysdeps/loongarch/libc-tls.c | 32 | ||||
| -rw-r--r-- | sysdeps/loongarch/nptl/tls.h | 138 | ||||
| -rw-r--r-- | sysdeps/loongarch/stackinfo.h | 33 |
4 files changed, 249 insertions, 0 deletions
diff --git a/sysdeps/loongarch/dl-tls.h b/sysdeps/loongarch/dl-tls.h new file mode 100644 index 0000000000..f82edcae76 --- /dev/null +++ b/sysdeps/loongarch/dl-tls.h @@ -0,0 +1,46 @@ +/* Thread-local storage handling in the ELF dynamic linker. + Copyright (C) 2022 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; + +/* 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..9285d11a7b --- /dev/null +++ b/sysdeps/loongarch/libc-tls.c @@ -0,0 +1,32 @@ +/* Thread-local storage handling in the ELF dynamic linker. + Copyright (C) 2022 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> + +/* 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/tls.h b/sysdeps/loongarch/nptl/tls.h new file mode 100644 index 0000000000..3b271c4b60 --- /dev/null +++ b/sysdeps/loongarch/nptl/tls.h @@ -0,0 +1,138 @@ +/* Definition for thread-local data handling. + Copyright (C) 2022 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 _LOONGARCH_TLS_H +#define _LOONGARCH_TLS_H 1 + +#include <dl-sysdep.h> + +#ifndef __ASSEMBLER__ +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> +#include <dl-dtv.h> + +register void *__thread_self asm ("$tp"); +#define READ_THREAD_POINTER() ({ __thread_self; }) + +/* Get system call information. */ +#include <sysdep.h> + +/* 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 <nptl/descr.h> + +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 <tcb-access.h> + +/* 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..ff8b9b7bf2 --- /dev/null +++ b/sysdeps/loongarch/stackinfo.h @@ -0,0 +1,33 @@ +/* Stack environment definitions for LoongArch. + Copyright (C) 2022 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 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 */ |