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575 lines
11 KiB
ArmAsm
575 lines
11 KiB
ArmAsm
/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#include <sysdep.h>
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#include <pthread-errnos.h>
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#include <kernel-features.h>
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#include <lowlevellock.h>
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#include "lowlevel-atomic.h"
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.text
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#ifdef __ASSUME_PRIVATE_FUTEX
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# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
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mov #(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg; \
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extu.b reg, reg
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# define LOAD_PRIVATE_FUTEX_WAKE(reg,tmp,tmp2) \
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mov #(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg; \
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extu.b reg, reg
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# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
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mov #(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), tmp; \
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extu.b tmp, tmp; \
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xor tmp, reg
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# define LOAD_FUTEX_WAIT_ABS(reg,tmp,tmp2) \
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mov #(FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG), tmp; \
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extu.b tmp, tmp; \
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mov #(FUTEX_CLOCK_REALTIME >> 8), tmp2; \
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swap.b tmp2, tmp2; \
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or tmp2, tmp; \
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xor tmp, reg
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# define LOAD_FUTEX_WAKE(reg,tmp,tmp2) \
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mov #(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), tmp; \
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extu.b tmp, tmp; \
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xor tmp, reg
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#else
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# if FUTEX_WAIT == 0
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# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, reg ; \
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add reg, tmp ; \
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bra 98f ; \
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mov.l @tmp, reg ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98:
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# else
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# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, reg ; \
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add reg, tmp ; \
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mov.l @tmp, reg ; \
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bra 98f ; \
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mov #FUTEX_WAIT, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: or tmp, reg
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# endif
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# define LOAD_PRIVATE_FUTEX_WAKE(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, reg ; \
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add reg, tmp ; \
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mov.l @tmp, reg ; \
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bra 98f ; \
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mov #FUTEX_WAKE, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: or tmp, reg
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# if FUTEX_WAIT == 0
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# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, tmp2 ; \
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add tmp2, tmp ; \
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mov.l @tmp, tmp2 ; \
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bra 98f ; \
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mov #FUTEX_PRIVATE_FLAG, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: extu.b tmp, tmp ; \
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xor tmp, reg ; \
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and tmp2, reg
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# else
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# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, tmp2 ; \
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add tmp2, tmp ; \
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mov.l @tmp, tmp2 ; \
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bra 98f ; \
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mov #FUTEX_PRIVATE_FLAG, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: extu.b tmp, tmp ; \
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xor tmp, reg ; \
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and tmp2, reg ; \
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mov #FUTEX_WAIT, tmp ; \
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or tmp, reg
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# endif
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# define LOAD_FUTEX_WAIT_ABS(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, tmp2 ; \
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add tmp2, tmp ; \
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mov.l @tmp, tmp2 ; \
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bra 98f ; \
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mov #FUTEX_PRIVATE_FLAG, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: extu.b tmp, tmp ; \
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xor tmp, reg ; \
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and tmp2, reg ; \
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mov #FUTEX_WAIT_BITSET, tmp ; \
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mov #(FUTEX_CLOCK_REALTIME >> 8), tmp2; \
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swap.b tmp2, tmp2; \
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or tmp2, tmp; \
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or tmp, reg
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# define LOAD_FUTEX_WAKE(reg,tmp,tmp2) \
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stc gbr, tmp ; \
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mov.w 99f, tmp2 ; \
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add tmp2, tmp ; \
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mov.l @tmp, tmp2 ; \
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bra 98f ; \
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mov #FUTEX_PRIVATE_FLAG, tmp ; \
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99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
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98: extu.b tmp, tmp ; \
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xor tmp, reg ; \
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and tmp2, reg ; \
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mov #FUTEX_WAKE, tmp ; \
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or tmp, reg
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#endif
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.globl __lll_lock_wait_private
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.type __lll_lock_wait_private,@function
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.hidden __lll_lock_wait_private
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.align 5
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cfi_startproc
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__lll_lock_wait_private:
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mov.l r8, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r8, 0)
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mov r4, r6
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mov r5, r8
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mov #0, r7 /* No timeout. */
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LOAD_PRIVATE_FUTEX_WAIT (r5, r0, r1)
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mov #2, r4
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cmp/eq r4, r6
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bf 2f
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1:
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mov r8, r4
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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2:
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mov #2, r6
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XCHG (r6, @r8, r2)
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tst r2, r2
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bf 1b
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mov.l @r15+, r8
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r8)
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rts
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mov r2, r0
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cfi_endproc
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.size __lll_lock_wait_private,.-__lll_lock_wait_private
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#ifdef NOT_IN_libc
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.globl __lll_lock_wait
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.type __lll_lock_wait,@function
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.hidden __lll_lock_wait
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.align 5
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cfi_startproc
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__lll_lock_wait:
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mov.l r9, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r9, 0)
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mov.l r8, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r8, 0)
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mov r6, r9
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mov r4, r6
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mov r5, r8
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mov #0, r7 /* No timeout. */
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mov r9, r5
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LOAD_FUTEX_WAIT (r5, r0, r1)
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mov #2, r4
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cmp/eq r4, r6
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bf 2f
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1:
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mov r8, r4
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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2:
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mov #2, r6
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XCHG (r6, @r8, r2)
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tst r2, r2
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bf 1b
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mov.l @r15+, r8
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r8)
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mov.l @r15+, r9
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r9)
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ret
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mov r2, r0
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cfi_endproc
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.size __lll_lock_wait,.-__lll_lock_wait
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/* r5 (r8): futex
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r7 (r11): flags
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r6 (r9): timeout
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r4 (r10): futex value
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*/
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.globl __lll_timedlock_wait
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.type __lll_timedlock_wait,@function
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.hidden __lll_timedlock_wait
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.align 5
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cfi_startproc
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__lll_timedlock_wait:
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mov.l r12, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r12, 0)
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# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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mov.l .Lhave, r1
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# ifdef PIC
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mova .Lgot, r0
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mov.l .Lgot, r12
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add r0, r12
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add r12, r1
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# endif
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mov.l @r1, r0
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tst r0, r0
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bt .Lreltmo
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# endif
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/* if (timeout->tv_sec < 0) return ETIMEDOUT; */
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mov.l @r6, r1
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cmp/pz r1
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bf/s 5f
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mov #ETIMEDOUT, r0
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mov r4, r2
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mov r5, r4
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mov r7, r5
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mov r6, r7
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LOAD_FUTEX_WAIT_ABS (r5, r0, r1)
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mov #2, r6
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cmp/eq r6, r2
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bf/s 2f
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mov r6, r2
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1:
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mov #2, r6
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mov #-1, r1
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x16
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SYSCALL_INST_PAD
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mov r0, r6
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2:
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XCHG (r2, @r4, r3) /* NB: lock is implied */
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tst r3, r3
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bt/s 3f
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mov r6, r0
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cmp/eq #-ETIMEDOUT, r0
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bt 4f
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cmp/eq #-EINVAL, r0
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bf 1b
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4:
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neg r0, r3
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3:
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mov r3, r0
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5:
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rts
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mov.l @r15+, r12
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/* Omit CFI for restore in delay slot. */
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# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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.align 2
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# ifdef PIC
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.Lgot:
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.long _GLOBAL_OFFSET_TABLE_
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.Lhave:
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.long __have_futex_clock_realtime@GOTOFF
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# else
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.Lhave:
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.long __have_futex_clock_realtime
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# endif
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.Lreltmo:
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/* Check for a valid timeout value. */
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mov.l @(4,r6), r1
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mov.l .L1g, r0
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cmp/hs r0, r1
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bt 3f
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cfi_remember_state
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mov.l r11, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r11, 0)
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mov.l r10, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r10, 0)
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mov.l r9, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r9, 0)
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mov.l r8, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r8, 0)
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mov r7, r11
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mov r4, r10
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mov r6, r9
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mov r5, r8
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/* Stack frame for the timespec and timeval structs. */
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add #-8, r15
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cfi_adjust_cfa_offset(8)
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mov #2, r2
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XCHG (r2, @r8, r3)
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tst r3, r3
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bt 6f
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1:
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/* Get current time. */
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mov r15, r4
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mov #0, r5
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mov #__NR_gettimeofday, r3
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trapa #0x12
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SYSCALL_INST_PAD
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/* Compute relative timeout. */
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mov.l @(4,r15), r0
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mov.w .L1k, r1
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dmulu.l r0, r1 /* Micro seconds to nano seconds. */
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mov.l @r9, r2
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mov.l @(4,r9), r3
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mov.l @r15, r0
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sts macl, r1
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sub r0, r2
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clrt
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subc r1, r3
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bf 4f
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mov.l .L1g, r1
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add r1, r3
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add #-1, r2
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4:
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cmp/pz r2
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bf 2f /* Time is already up. */
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mov.l r2, @r15 /* Store relative timeout. */
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mov.l r3, @(4,r15)
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mov r8, r4
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mov r11, r5
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LOAD_FUTEX_WAIT (r5, r0, r1)
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mov r10, r6
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mov r15, r7
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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mov r0, r5
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mov #2, r2
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XCHG (r2, @r8, r3)
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tst r3, r3
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bt/s 6f
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mov #-ETIMEDOUT, r1
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cmp/eq r5, r1
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bf 1b
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2: mov #ETIMEDOUT, r3
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6:
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add #8, r15
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cfi_adjust_cfa_offset (-8)
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mov.l @r15+, r8
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r8)
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mov.l @r15+, r9
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r9)
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mov.l @r15+, r10
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r10)
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mov.l @r15+, r11
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r11)
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mov.l @r15+, r12
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r12)
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rts
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mov r3, r0
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cfi_restore_state
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3:
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mov.l @r15+, r12
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r12)
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rts
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mov #EINVAL, r0
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# endif
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cfi_endproc
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.L1k:
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.word 1000
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.align 2
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.L1g:
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.long 1000000000
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.size __lll_timedlock_wait,.-__lll_timedlock_wait
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#endif
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.globl __lll_unlock_wake_private
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.type __lll_unlock_wake_private,@function
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.hidden __lll_unlock_wake_private
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.align 5
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cfi_startproc
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__lll_unlock_wake_private:
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LOAD_PRIVATE_FUTEX_WAKE (r5, r0, r1)
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mov #1, r6 /* Wake one thread. */
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mov #0, r7
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mov.l r7, @r4 /* Stores 0. */
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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rts
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nop
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cfi_endproc
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.size __lll_unlock_wake_private,.-__lll_unlock_wake_private
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#ifdef NOT_IN_libc
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.globl __lll_unlock_wake
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.type __lll_unlock_wake,@function
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.hidden __lll_unlock_wake
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.align 5
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cfi_startproc
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__lll_unlock_wake:
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LOAD_FUTEX_WAKE (r5, r0, r1)
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mov #1, r6 /* Wake one thread. */
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mov #0, r7
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mov.l r7, @r4 /* Stores 0. */
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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rts
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nop
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cfi_endproc
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.size __lll_unlock_wake,.-__lll_unlock_wake
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.globl __lll_timedwait_tid
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.type __lll_timedwait_tid,@function
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.hidden __lll_timedwait_tid
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.align 5
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cfi_startproc
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__lll_timedwait_tid:
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mov.l r9, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r9, 0)
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mov.l r8, @-r15
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cfi_adjust_cfa_offset(4)
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cfi_rel_offset (r8, 0)
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mov r4, r8
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mov r5, r9
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/* Stack frame for the timespec and timeval structs. */
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add #-8, r15
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cfi_adjust_cfa_offset(8)
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2:
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/* Get current time. */
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mov r15, r4
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mov #0, r5
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mov #__NR_gettimeofday, r3
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trapa #0x12
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SYSCALL_INST_PAD
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/* Compute relative timeout. */
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mov.l @(4,r15), r0
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mov.w .L1k2, r1
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dmulu.l r0, r1 /* Micro seconds to nano seconds. */
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mov.l @r9, r2
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mov.l @(4,r9), r3
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mov.l @r15, r0
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|
sts macl, r1
|
|
sub r0, r2
|
|
clrt
|
|
subc r1, r3
|
|
bf 5f
|
|
mov.l .L1g2, r1
|
|
add r1, r3
|
|
add #-1, r2
|
|
5:
|
|
cmp/pz r2
|
|
bf 6f /* Time is already up. */
|
|
|
|
mov.l r2, @r15 /* Store relative timeout. */
|
|
mov.l r3, @(4,r15)
|
|
|
|
mov.l @r8, r2
|
|
tst r2, r2
|
|
bt 4f
|
|
|
|
mov r8, r4
|
|
/* XXX The kernel so far uses global futex for the wakeup at
|
|
all times. */
|
|
mov #0, r5
|
|
extu.b r5, r5
|
|
mov r2, r6
|
|
mov r15, r7
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
|
|
mov.l @r8, r2
|
|
tst r2, r2
|
|
bf 1f
|
|
4:
|
|
mov #0, r0
|
|
3:
|
|
cfi_remember_state
|
|
add #8, r15
|
|
cfi_adjust_cfa_offset (-8)
|
|
mov.l @r15+, r8
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r8)
|
|
rts
|
|
mov.l @r15+, r9
|
|
/* Omit CFI for restore in delay slot. */
|
|
cfi_restore_state
|
|
1:
|
|
/* Check whether the time expired. */
|
|
mov #-ETIMEDOUT, r1
|
|
cmp/eq r0, r1
|
|
bf 2b
|
|
6:
|
|
bra 3b
|
|
mov #ETIMEDOUT, r0
|
|
cfi_endproc
|
|
|
|
.L1k2:
|
|
.word 1000
|
|
.align 2
|
|
.L1g2:
|
|
.long 1000000000
|
|
.size __lll_timedwait_tid,.-__lll_timedwait_tid
|
|
#endif
|