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Diffstat (limited to 'sysdeps/x86_64/nptl/tls.h')
| -rw-r--r-- | sysdeps/x86_64/nptl/tls.h | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/sysdeps/x86_64/nptl/tls.h b/sysdeps/x86_64/nptl/tls.h deleted file mode 100644 index 9b8ad82550..0000000000 --- a/sysdeps/x86_64/nptl/tls.h +++ /dev/null @@ -1,367 +0,0 @@ -/* Definition for thread-local data handling. nptl/x86_64 version. - Copyright (C) 2002-2017 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 - <http://www.gnu.org/licenses/>. */ - -#ifndef _TLS_H -#define _TLS_H 1 - -#ifndef __ASSEMBLER__ -# include <asm/prctl.h> /* For ARCH_SET_FS. */ -# include <stdbool.h> -# include <stddef.h> -# include <stdint.h> -# include <stdlib.h> -# include <sysdep.h> -# include <libc-pointer-arith.h> /* For cast_to_integer. */ -# include <kernel-features.h> -# include <dl-dtv.h> - -/* Replacement type for __m128 since this file is included by ld.so, - which is compiled with -mno-sse. It must not change the alignment - of rtld_savespace_sse. */ -typedef struct -{ - int i[4]; -} __128bits; - - -typedef struct -{ - void *tcb; /* Pointer to the TCB. Not necessarily the - thread descriptor used by libpthread. */ - dtv_t *dtv; - void *self; /* Pointer to the thread descriptor. */ - int multiple_threads; - int gscope_flag; - uintptr_t sysinfo; - uintptr_t stack_guard; - uintptr_t pointer_guard; - unsigned long int vgetcpu_cache[2]; -# ifndef __ASSUME_PRIVATE_FUTEX - int private_futex; -# else - int __glibc_reserved1; -# endif - int __glibc_unused1; - /* Reservation of some values for the TM ABI. */ - void *__private_tm[4]; - /* GCC split stack support. */ - void *__private_ss; - long int __glibc_reserved2; - /* Must be kept even if it is no longer used by glibc since programs, - like AddressSanitizer, depend on the size of tcbhead_t. */ - __128bits __glibc_unused2[8][4] __attribute__ ((aligned (32))); - - void *__padding[8]; -} tcbhead_t; - -#else /* __ASSEMBLER__ */ -# include <tcb-offsets.h> -#endif - - -/* Alignment requirement for the stack. */ -#define STACK_ALIGN 16 - - -#ifndef __ASSEMBLER__ -/* Get system call information. */ -# include <sysdep.h> - -#ifndef LOCK_PREFIX -# ifdef UP -# define LOCK_PREFIX /* nothing */ -# else -# define LOCK_PREFIX "lock;" -# endif -#endif - -/* This is the size of the initial TCB. Can't be just sizeof (tcbhead_t), - because NPTL getpid, __libc_alloca_cutoff etc. need (almost) the whole - struct pthread even when not linked with -lpthread. */ -# define TLS_INIT_TCB_SIZE sizeof (struct pthread) - -/* Alignment requirements for the initial TCB. */ -# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread) - -/* This is the size of the TCB. */ -# define TLS_TCB_SIZE sizeof (struct pthread) - -/* Alignment requirements for the TCB. */ -# define TLS_TCB_ALIGN __alignof__ (struct pthread) - -/* The TCB can have any size and the memory following the address the - thread pointer points to is unspecified. Allocate the TCB there. */ -# define TLS_TCB_AT_TP 1 -# define TLS_DTV_AT_TP 0 - -/* Get the thread descriptor definition. */ -# include <nptl/descr.h> - - -/* Install the dtv pointer. The pointer passed is to the element with - index -1 which contain the length. */ -# define INSTALL_DTV(descr, dtvp) \ - ((tcbhead_t *) (descr))->dtv = (dtvp) + 1 - -/* Install new dtv for current thread. */ -# define INSTALL_NEW_DTV(dtvp) \ - ({ struct pthread *__pd; \ - THREAD_SETMEM (__pd, header.dtv, (dtvp)); }) - -/* Return dtv of given thread descriptor. */ -# define GET_DTV(descr) \ - (((tcbhead_t *) (descr))->dtv) - - -/* Code to initially initialize the thread pointer. This might need - special attention since 'errno' is not yet available and if the - operation can cause a failure 'errno' must not be touched. - - We have to make the syscall for both uses of the macro since the - address might be (and probably is) different. */ -# define TLS_INIT_TP(thrdescr) \ - ({ void *_thrdescr = (thrdescr); \ - tcbhead_t *_head = _thrdescr; \ - int _result; \ - \ - _head->tcb = _thrdescr; \ - /* For now the thread descriptor is at the same address. */ \ - _head->self = _thrdescr; \ - \ - /* It is a simple syscall to set the %fs value for the thread. */ \ - asm volatile ("syscall" \ - : "=a" (_result) \ - : "0" ((unsigned long int) __NR_arch_prctl), \ - "D" ((unsigned long int) ARCH_SET_FS), \ - "S" (_thrdescr) \ - : "memory", "cc", "r11", "cx"); \ - \ - _result ? "cannot set %fs base address for thread-local storage" : 0; \ - }) - -# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) - - -/* Return the address of the dtv for the current thread. */ -# define THREAD_DTV() \ - ({ struct pthread *__pd; \ - THREAD_GETMEM (__pd, header.dtv); }) - - -/* Return the thread descriptor for the current thread. - - The contained asm must *not* be marked volatile since otherwise - assignments like - pthread_descr self = thread_self(); - do not get optimized away. */ -# define THREAD_SELF \ - ({ struct pthread *__self; \ - asm ("mov %%fs:%c1,%0" : "=r" (__self) \ - : "i" (offsetof (struct pthread, header.self))); \ - __self;}) - -/* Magic for libthread_db to know how to do THREAD_SELF. */ -# define DB_THREAD_SELF_INCLUDE <sys/reg.h> /* For the FS constant. */ -# define DB_THREAD_SELF CONST_THREAD_AREA (64, FS) - -/* Read member of the thread descriptor directly. */ -# define THREAD_GETMEM(descr, member) \ - ({ __typeof (descr->member) __value; \ - if (sizeof (__value) == 1) \ - asm volatile ("movb %%fs:%P2,%b0" \ - : "=q" (__value) \ - : "0" (0), "i" (offsetof (struct pthread, member))); \ - else if (sizeof (__value) == 4) \ - asm volatile ("movl %%fs:%P1,%0" \ - : "=r" (__value) \ - : "i" (offsetof (struct pthread, member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, \ - 4 or 8. */ \ - abort (); \ - \ - asm volatile ("movq %%fs:%P1,%q0" \ - : "=r" (__value) \ - : "i" (offsetof (struct pthread, member))); \ - } \ - __value; }) - - -/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ -# define THREAD_GETMEM_NC(descr, member, idx) \ - ({ __typeof (descr->member[0]) __value; \ - if (sizeof (__value) == 1) \ - asm volatile ("movb %%fs:%P2(%q3),%b0" \ - : "=q" (__value) \ - : "0" (0), "i" (offsetof (struct pthread, member[0])), \ - "r" (idx)); \ - else if (sizeof (__value) == 4) \ - asm volatile ("movl %%fs:%P1(,%q2,4),%0" \ - : "=r" (__value) \ - : "i" (offsetof (struct pthread, member[0])), "r" (idx));\ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, \ - 4 or 8. */ \ - abort (); \ - \ - asm volatile ("movq %%fs:%P1(,%q2,8),%q0" \ - : "=r" (__value) \ - : "i" (offsetof (struct pthread, member[0])), \ - "r" (idx)); \ - } \ - __value; }) - - -/* Loading addresses of objects on x86-64 needs to be treated special - when generating PIC code. */ -#ifdef __pic__ -# define IMM_MODE "nr" -#else -# define IMM_MODE "ir" -#endif - - -/* Set member of the thread descriptor directly. */ -# define THREAD_SETMEM(descr, member, value) \ - ({ if (sizeof (descr->member) == 1) \ - asm volatile ("movb %b0,%%fs:%P1" : \ - : "iq" (value), \ - "i" (offsetof (struct pthread, member))); \ - else if (sizeof (descr->member) == 4) \ - asm volatile ("movl %0,%%fs:%P1" : \ - : IMM_MODE (value), \ - "i" (offsetof (struct pthread, member))); \ - else \ - { \ - if (sizeof (descr->member) != 8) \ - /* There should not be any value with a size other than 1, \ - 4 or 8. */ \ - abort (); \ - \ - asm volatile ("movq %q0,%%fs:%P1" : \ - : IMM_MODE ((uint64_t) cast_to_integer (value)), \ - "i" (offsetof (struct pthread, member))); \ - }}) - - -/* Same as THREAD_SETMEM, but the member offset can be non-constant. */ -# define THREAD_SETMEM_NC(descr, member, idx, value) \ - ({ if (sizeof (descr->member[0]) == 1) \ - asm volatile ("movb %b0,%%fs:%P1(%q2)" : \ - : "iq" (value), \ - "i" (offsetof (struct pthread, member[0])), \ - "r" (idx)); \ - else if (sizeof (descr->member[0]) == 4) \ - asm volatile ("movl %0,%%fs:%P1(,%q2,4)" : \ - : IMM_MODE (value), \ - "i" (offsetof (struct pthread, member[0])), \ - "r" (idx)); \ - else \ - { \ - if (sizeof (descr->member[0]) != 8) \ - /* There should not be any value with a size other than 1, \ - 4 or 8. */ \ - abort (); \ - \ - asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \ - : IMM_MODE ((uint64_t) cast_to_integer (value)), \ - "i" (offsetof (struct pthread, member[0])), \ - "r" (idx)); \ - }}) - - -/* Atomic compare and exchange on TLS, returning old value. */ -# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, newval, oldval) \ - ({ __typeof (descr->member) __ret; \ - __typeof (oldval) __old = (oldval); \ - if (sizeof (descr->member) == 4) \ - asm volatile (LOCK_PREFIX "cmpxchgl %2, %%fs:%P3" \ - : "=a" (__ret) \ - : "0" (__old), "r" (newval), \ - "i" (offsetof (struct pthread, member))); \ - else \ - /* Not necessary for other sizes in the moment. */ \ - abort (); \ - __ret; }) - - -/* Atomic logical and. */ -# define THREAD_ATOMIC_AND(descr, member, val) \ - (void) ({ if (sizeof ((descr)->member) == 4) \ - asm volatile (LOCK_PREFIX "andl %1, %%fs:%P0" \ - :: "i" (offsetof (struct pthread, member)), \ - "ir" (val)); \ - else \ - /* Not necessary for other sizes in the moment. */ \ - abort (); }) - - -/* Atomic set bit. */ -# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \ - (void) ({ if (sizeof ((descr)->member) == 4) \ - asm volatile (LOCK_PREFIX "orl %1, %%fs:%P0" \ - :: "i" (offsetof (struct pthread, member)), \ - "ir" (1 << (bit))); \ - else \ - /* Not necessary for other sizes in the moment. */ \ - abort (); }) - - -/* Set the stack guard field in TCB head. */ -# define THREAD_SET_STACK_GUARD(value) \ - THREAD_SETMEM (THREAD_SELF, header.stack_guard, value) -# define THREAD_COPY_STACK_GUARD(descr) \ - ((descr)->header.stack_guard \ - = THREAD_GETMEM (THREAD_SELF, header.stack_guard)) - - -/* Set the pointer guard field in the TCB head. */ -# define THREAD_SET_POINTER_GUARD(value) \ - THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value) -# define THREAD_COPY_POINTER_GUARD(descr) \ - ((descr)->header.pointer_guard \ - = THREAD_GETMEM (THREAD_SELF, header.pointer_guard)) - - -/* Get and set the global scope generation counter in the TCB head. */ -# 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; \ - asm volatile ("xchgl %0, %%fs:%P1" \ - : "=r" (__res) \ - : "i" (offsetof (struct pthread, header.gscope_flag)), \ - "0" (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() \ - THREAD_SETMEM (THREAD_SELF, header.gscope_flag, THREAD_GSCOPE_FLAG_USED) -# define THREAD_GSCOPE_WAIT() \ - GL(dl_wait_lookup_done) () - -#endif /* __ASSEMBLER__ */ - -#endif /* tls.h */ |