9090848d06
posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar
to what was done with libc-diag.h, I have split the definitions of
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN
to a new header, libc-pointer-arith.h.
It then occurred to me that the remaining declarations in libc-internal.h
are mostly to do with early initialization, and probably most of the
files including it, even in the core code, don't need it anymore. Indeed,
only 19 files actually need what remains of libc-internal.h. 23 others
need libc-diag.h instead, and 12 need libc-pointer-arith.h instead.
No file needs more than one of them, and 16 don't need any of them!
So, with this patch, libc-internal.h stops including libc-diag.h as
well as losing the pointer arithmetic macros, and all including files
are adjusted.
* include/libc-pointer-arith.h: New file. Define
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and
PTR_ALIGN_DOWN here.
* include/libc-internal.h: Definitions of above macros
moved from here. Don't include libc-diag.h anymore either.
* posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h.
Don't include libc-internal.h.
* debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c
* io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c
* nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c
* string/strcoll_l.c, sysdeps/nacl/brk.c
* sysdeps/unix/clock_settime.c
* sysdeps/unix/sysv/linux/i386/get_clockfreq.c
* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c:
Don't include libc-internal.h.
* elf/get-dynamic-info.h, iconv/loop.c
* iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h
* misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h
* nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c
* soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c
* sysdeps/ieee754/dbl-64/e_lgamma_r.c
* sysdeps/ieee754/dbl-64/k_rem_pio2.c
* sysdeps/ieee754/flt-32/e_lgammaf_r.c
* sysdeps/ieee754/flt-32/k_rem_pio2f.c
* sysdeps/ieee754/ldbl-128/k_tanl.c
* sysdeps/ieee754/ldbl-128ibm/k_tanl.c
* sysdeps/ieee754/ldbl-96/e_lgammal_r.c
* sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h:
Include libc-diag.h instead of libc-internal.h.
* elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c
* nptl/nptl-init.c, string/strcspn.c, string/strspn.c
* malloc/malloc.c, sysdeps/i386/nptl/tls.h
* sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h
* sysdeps/unix/sysv/linux/spawni.c
* sysdeps/x86_64/nptl/tls.h:
Include libc-pointer-arith.h instead of libc-internal.h.
* elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h
* sysdeps/x86_64/atomic-machine.h:
Add multiple include guard.
482 lines
18 KiB
C
482 lines
18 KiB
C
/* Copyright (C) 2002-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _X86_64_ATOMIC_MACHINE_H
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#define _X86_64_ATOMIC_MACHINE_H 1
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#include <stdint.h>
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#include <tls.h> /* For tcbhead_t. */
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#include <libc-pointer-arith.h> /* For cast_to_integer. */
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typedef int8_t atomic8_t;
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typedef uint8_t uatomic8_t;
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typedef int_fast8_t atomic_fast8_t;
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typedef uint_fast8_t uatomic_fast8_t;
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typedef int16_t atomic16_t;
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typedef uint16_t uatomic16_t;
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typedef int_fast16_t atomic_fast16_t;
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typedef uint_fast16_t uatomic_fast16_t;
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typedef int32_t atomic32_t;
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typedef uint32_t uatomic32_t;
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typedef int_fast32_t atomic_fast32_t;
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typedef uint_fast32_t uatomic_fast32_t;
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typedef int64_t atomic64_t;
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typedef uint64_t uatomic64_t;
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typedef int_fast64_t atomic_fast64_t;
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typedef uint_fast64_t uatomic_fast64_t;
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typedef intptr_t atomicptr_t;
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typedef uintptr_t uatomicptr_t;
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typedef intmax_t atomic_max_t;
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typedef uintmax_t uatomic_max_t;
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#ifndef LOCK_PREFIX
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# ifdef UP
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# define LOCK_PREFIX /* nothing */
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# else
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# define LOCK_PREFIX "lock;"
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# endif
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#endif
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#define __HAVE_64B_ATOMICS 1
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#define USE_ATOMIC_COMPILER_BUILTINS 1
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#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
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__sync_val_compare_and_swap (mem, oldval, newval)
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#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
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(! __sync_bool_compare_and_swap (mem, oldval, newval))
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#define __arch_c_compare_and_exchange_val_8_acq(mem, newval, oldval) \
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({ __typeof (*mem) ret; \
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__asm __volatile ("cmpl $0, %%fs:%P5\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgb %b2, %1" \
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: "=a" (ret), "=m" (*mem) \
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: "q" (newval), "m" (*mem), "0" (oldval), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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ret; })
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#define __arch_c_compare_and_exchange_val_16_acq(mem, newval, oldval) \
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({ __typeof (*mem) ret; \
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__asm __volatile ("cmpl $0, %%fs:%P5\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgw %w2, %1" \
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: "=a" (ret), "=m" (*mem) \
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: "q" (newval), "m" (*mem), "0" (oldval), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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ret; })
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#define __arch_c_compare_and_exchange_val_32_acq(mem, newval, oldval) \
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({ __typeof (*mem) ret; \
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__asm __volatile ("cmpl $0, %%fs:%P5\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgl %2, %1" \
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: "=a" (ret), "=m" (*mem) \
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: "q" (newval), "m" (*mem), "0" (oldval), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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ret; })
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#define __arch_c_compare_and_exchange_val_64_acq(mem, newval, oldval) \
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({ __typeof (*mem) ret; \
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__asm __volatile ("cmpl $0, %%fs:%P5\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgq %q2, %1" \
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: "=a" (ret), "=m" (*mem) \
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: "q" ((atomic64_t) cast_to_integer (newval)), \
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"m" (*mem), \
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"0" ((atomic64_t) cast_to_integer (oldval)), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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ret; })
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/* Note that we need no lock prefix. */
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#define atomic_exchange_acq(mem, newvalue) \
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({ __typeof (*mem) result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile ("xchgb %b0, %1" \
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: "=q" (result), "=m" (*mem) \
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: "0" (newvalue), "m" (*mem)); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile ("xchgw %w0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" (newvalue), "m" (*mem)); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile ("xchgl %0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" (newvalue), "m" (*mem)); \
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else \
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__asm __volatile ("xchgq %q0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" ((atomic64_t) cast_to_integer (newvalue)), \
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"m" (*mem)); \
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result; })
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#define __arch_exchange_and_add_body(lock, mem, value) \
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({ __typeof (*mem) result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile (lock "xaddb %b0, %1" \
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: "=q" (result), "=m" (*mem) \
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: "0" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (lock "xaddw %w0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (lock "xaddl %0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else \
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__asm __volatile (lock "xaddq %q0, %1" \
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: "=r" (result), "=m" (*mem) \
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: "0" ((atomic64_t) cast_to_integer (value)), \
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"m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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result; })
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#define atomic_exchange_and_add(mem, value) \
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__sync_fetch_and_add (mem, value)
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#define __arch_exchange_and_add_cprefix \
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"cmpl $0, %%fs:%P4\n\tje 0f\n\tlock\n0:\t"
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#define catomic_exchange_and_add(mem, value) \
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__arch_exchange_and_add_body (__arch_exchange_and_add_cprefix, mem, value)
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#define __arch_add_body(lock, pfx, mem, value) \
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do { \
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if (__builtin_constant_p (value) && (value) == 1) \
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pfx##_increment (mem); \
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else if (__builtin_constant_p (value) && (value) == -1) \
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pfx##_decrement (mem); \
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else if (sizeof (*mem) == 1) \
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__asm __volatile (lock "addb %b1, %0" \
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: "=m" (*mem) \
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: "iq" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (lock "addw %w1, %0" \
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: "=m" (*mem) \
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: "ir" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (lock "addl %1, %0" \
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: "=m" (*mem) \
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: "ir" (value), "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else \
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__asm __volatile (lock "addq %q1, %0" \
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: "=m" (*mem) \
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: "ir" ((atomic64_t) cast_to_integer (value)), \
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"m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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} while (0)
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#define atomic_add(mem, value) \
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__arch_add_body (LOCK_PREFIX, atomic, mem, value)
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#define __arch_add_cprefix \
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"cmpl $0, %%fs:%P3\n\tje 0f\n\tlock\n0:\t"
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#define catomic_add(mem, value) \
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__arch_add_body (__arch_add_cprefix, catomic, mem, value)
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#define atomic_add_negative(mem, value) \
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({ unsigned char __result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile (LOCK_PREFIX "addb %b2, %0; sets %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "iq" (value), "m" (*mem)); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (LOCK_PREFIX "addw %w2, %0; sets %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" (value), "m" (*mem)); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (LOCK_PREFIX "addl %2, %0; sets %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" (value), "m" (*mem)); \
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else \
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__asm __volatile (LOCK_PREFIX "addq %q2, %0; sets %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" ((atomic64_t) cast_to_integer (value)), \
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"m" (*mem)); \
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__result; })
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#define atomic_add_zero(mem, value) \
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({ unsigned char __result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile (LOCK_PREFIX "addb %b2, %0; setz %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "iq" (value), "m" (*mem)); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (LOCK_PREFIX "addw %w2, %0; setz %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" (value), "m" (*mem)); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (LOCK_PREFIX "addl %2, %0; setz %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" (value), "m" (*mem)); \
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else \
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__asm __volatile (LOCK_PREFIX "addq %q2, %0; setz %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "ir" ((atomic64_t) cast_to_integer (value)), \
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"m" (*mem)); \
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__result; })
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#define __arch_increment_body(lock, mem) \
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do { \
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if (sizeof (*mem) == 1) \
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__asm __volatile (lock "incb %b0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (lock "incw %w0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (lock "incl %0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else \
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__asm __volatile (lock "incq %q0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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} while (0)
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#define atomic_increment(mem) __arch_increment_body (LOCK_PREFIX, mem)
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#define __arch_increment_cprefix \
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"cmpl $0, %%fs:%P2\n\tje 0f\n\tlock\n0:\t"
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#define catomic_increment(mem) \
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__arch_increment_body (__arch_increment_cprefix, mem)
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#define atomic_increment_and_test(mem) \
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({ unsigned char __result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile (LOCK_PREFIX "incb %b0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (LOCK_PREFIX "incw %w0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (LOCK_PREFIX "incl %0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else \
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__asm __volatile (LOCK_PREFIX "incq %q0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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__result; })
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#define __arch_decrement_body(lock, mem) \
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do { \
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if (sizeof (*mem) == 1) \
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__asm __volatile (lock "decb %b0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (lock "decw %w0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (lock "decl %0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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else \
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__asm __volatile (lock "decq %q0" \
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: "=m" (*mem) \
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: "m" (*mem), \
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"i" (offsetof (tcbhead_t, multiple_threads))); \
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} while (0)
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#define atomic_decrement(mem) __arch_decrement_body (LOCK_PREFIX, mem)
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#define __arch_decrement_cprefix \
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"cmpl $0, %%fs:%P2\n\tje 0f\n\tlock\n0:\t"
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#define catomic_decrement(mem) \
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__arch_decrement_body (__arch_decrement_cprefix, mem)
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#define atomic_decrement_and_test(mem) \
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({ unsigned char __result; \
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if (sizeof (*mem) == 1) \
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__asm __volatile (LOCK_PREFIX "decb %b0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else if (sizeof (*mem) == 2) \
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__asm __volatile (LOCK_PREFIX "decw %w0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else if (sizeof (*mem) == 4) \
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__asm __volatile (LOCK_PREFIX "decl %0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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else \
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|
__asm __volatile (LOCK_PREFIX "decq %q0; sete %1" \
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: "=m" (*mem), "=qm" (__result) \
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: "m" (*mem)); \
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|
__result; })
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|
|
|
|
|
#define atomic_bit_set(mem, bit) \
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|
do { \
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|
if (sizeof (*mem) == 1) \
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|
__asm __volatile (LOCK_PREFIX "orb %b2, %0" \
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|
: "=m" (*mem) \
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|
: "m" (*mem), "iq" (1L << (bit))); \
|
|
else if (sizeof (*mem) == 2) \
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|
__asm __volatile (LOCK_PREFIX "orw %w2, %0" \
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|
: "=m" (*mem) \
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|
: "m" (*mem), "ir" (1L << (bit))); \
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|
else if (sizeof (*mem) == 4) \
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|
__asm __volatile (LOCK_PREFIX "orl %2, %0" \
|
|
: "=m" (*mem) \
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|
: "m" (*mem), "ir" (1L << (bit))); \
|
|
else if (__builtin_constant_p (bit) && (bit) < 32) \
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|
__asm __volatile (LOCK_PREFIX "orq %2, %0" \
|
|
: "=m" (*mem) \
|
|
: "m" (*mem), "i" (1L << (bit))); \
|
|
else \
|
|
__asm __volatile (LOCK_PREFIX "orq %q2, %0" \
|
|
: "=m" (*mem) \
|
|
: "m" (*mem), "r" (1UL << (bit))); \
|
|
} while (0)
|
|
|
|
|
|
#define atomic_bit_test_set(mem, bit) \
|
|
({ unsigned char __result; \
|
|
if (sizeof (*mem) == 1) \
|
|
__asm __volatile (LOCK_PREFIX "btsb %3, %1; setc %0" \
|
|
: "=q" (__result), "=m" (*mem) \
|
|
: "m" (*mem), "iq" (bit)); \
|
|
else if (sizeof (*mem) == 2) \
|
|
__asm __volatile (LOCK_PREFIX "btsw %3, %1; setc %0" \
|
|
: "=q" (__result), "=m" (*mem) \
|
|
: "m" (*mem), "ir" (bit)); \
|
|
else if (sizeof (*mem) == 4) \
|
|
__asm __volatile (LOCK_PREFIX "btsl %3, %1; setc %0" \
|
|
: "=q" (__result), "=m" (*mem) \
|
|
: "m" (*mem), "ir" (bit)); \
|
|
else \
|
|
__asm __volatile (LOCK_PREFIX "btsq %3, %1; setc %0" \
|
|
: "=q" (__result), "=m" (*mem) \
|
|
: "m" (*mem), "ir" (bit)); \
|
|
__result; })
|
|
|
|
|
|
#define atomic_spin_nop() asm ("rep; nop")
|
|
|
|
|
|
#define __arch_and_body(lock, mem, mask) \
|
|
do { \
|
|
if (sizeof (*mem) == 1) \
|
|
__asm __volatile (lock "andb %b1, %0" \
|
|
: "=m" (*mem) \
|
|
: "iq" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else if (sizeof (*mem) == 2) \
|
|
__asm __volatile (lock "andw %w1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else if (sizeof (*mem) == 4) \
|
|
__asm __volatile (lock "andl %1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else \
|
|
__asm __volatile (lock "andq %q1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
} while (0)
|
|
|
|
#define __arch_cprefix \
|
|
"cmpl $0, %%fs:%P3\n\tje 0f\n\tlock\n0:\t"
|
|
|
|
#define atomic_and(mem, mask) __arch_and_body (LOCK_PREFIX, mem, mask)
|
|
|
|
#define catomic_and(mem, mask) __arch_and_body (__arch_cprefix, mem, mask)
|
|
|
|
|
|
#define __arch_or_body(lock, mem, mask) \
|
|
do { \
|
|
if (sizeof (*mem) == 1) \
|
|
__asm __volatile (lock "orb %b1, %0" \
|
|
: "=m" (*mem) \
|
|
: "iq" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else if (sizeof (*mem) == 2) \
|
|
__asm __volatile (lock "orw %w1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else if (sizeof (*mem) == 4) \
|
|
__asm __volatile (lock "orl %1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
else \
|
|
__asm __volatile (lock "orq %q1, %0" \
|
|
: "=m" (*mem) \
|
|
: "ir" (mask), "m" (*mem), \
|
|
"i" (offsetof (tcbhead_t, multiple_threads))); \
|
|
} while (0)
|
|
|
|
#define atomic_or(mem, mask) __arch_or_body (LOCK_PREFIX, mem, mask)
|
|
|
|
#define catomic_or(mem, mask) __arch_or_body (__arch_cprefix, mem, mask)
|
|
|
|
/* We don't use mfence because it is supposedly slower due to having to
|
|
provide stronger guarantees (e.g., regarding self-modifying code). */
|
|
#define atomic_full_barrier() \
|
|
__asm __volatile (LOCK_PREFIX "orl $0, (%%rsp)" ::: "memory")
|
|
#define atomic_read_barrier() __asm ("" ::: "memory")
|
|
#define atomic_write_barrier() __asm ("" ::: "memory")
|
|
|
|
#endif /* atomic-machine.h */
|