mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-30 14:31:14 +00:00
575 lines
11 KiB
ArmAsm
575 lines
11 KiB
ArmAsm
/* Copyright (C) 2003-2014 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <pthread-errnos.h>
|
|
#include <kernel-features.h>
|
|
#include <lowlevellock.h>
|
|
#include "lowlevel-atomic.h"
|
|
|
|
.text
|
|
|
|
#ifdef __ASSUME_PRIVATE_FUTEX
|
|
# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
mov #(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), reg; \
|
|
extu.b reg, reg
|
|
# define LOAD_PRIVATE_FUTEX_WAKE(reg,tmp,tmp2) \
|
|
mov #(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), reg; \
|
|
extu.b reg, reg
|
|
# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
mov #(FUTEX_WAIT | FUTEX_PRIVATE_FLAG), tmp; \
|
|
extu.b tmp, tmp; \
|
|
xor tmp, reg
|
|
# define LOAD_FUTEX_WAIT_ABS(reg,tmp,tmp2) \
|
|
mov #(FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG), tmp; \
|
|
extu.b tmp, tmp; \
|
|
mov #(FUTEX_CLOCK_REALTIME >> 8), tmp2; \
|
|
swap.b tmp2, tmp2; \
|
|
or tmp2, tmp; \
|
|
xor tmp, reg
|
|
# define LOAD_FUTEX_WAKE(reg,tmp,tmp2) \
|
|
mov #(FUTEX_WAKE | FUTEX_PRIVATE_FLAG), tmp; \
|
|
extu.b tmp, tmp; \
|
|
xor tmp, reg
|
|
#else
|
|
# if FUTEX_WAIT == 0
|
|
# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, reg ; \
|
|
add reg, tmp ; \
|
|
bra 98f ; \
|
|
mov.l @tmp, reg ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98:
|
|
# else
|
|
# define LOAD_PRIVATE_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, reg ; \
|
|
add reg, tmp ; \
|
|
mov.l @tmp, reg ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_WAIT, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: or tmp, reg
|
|
# endif
|
|
# define LOAD_PRIVATE_FUTEX_WAKE(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, reg ; \
|
|
add reg, tmp ; \
|
|
mov.l @tmp, reg ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_WAKE, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: or tmp, reg
|
|
# if FUTEX_WAIT == 0
|
|
# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, tmp2 ; \
|
|
add tmp2, tmp ; \
|
|
mov.l @tmp, tmp2 ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_PRIVATE_FLAG, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: extu.b tmp, tmp ; \
|
|
xor tmp, reg ; \
|
|
and tmp2, reg
|
|
# else
|
|
# define LOAD_FUTEX_WAIT(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, tmp2 ; \
|
|
add tmp2, tmp ; \
|
|
mov.l @tmp, tmp2 ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_PRIVATE_FLAG, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: extu.b tmp, tmp ; \
|
|
xor tmp, reg ; \
|
|
and tmp2, reg ; \
|
|
mov #FUTEX_WAIT, tmp ; \
|
|
or tmp, reg
|
|
# endif
|
|
# define LOAD_FUTEX_WAIT_ABS(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, tmp2 ; \
|
|
add tmp2, tmp ; \
|
|
mov.l @tmp, tmp2 ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_PRIVATE_FLAG, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: extu.b tmp, tmp ; \
|
|
xor tmp, reg ; \
|
|
and tmp2, reg ; \
|
|
mov #FUTEX_WAIT_BITSET, tmp ; \
|
|
mov #(FUTEX_CLOCK_REALTIME >> 8), tmp2; \
|
|
swap.b tmp2, tmp2; \
|
|
or tmp2, tmp; \
|
|
or tmp, reg
|
|
# define LOAD_FUTEX_WAKE(reg,tmp,tmp2) \
|
|
stc gbr, tmp ; \
|
|
mov.w 99f, tmp2 ; \
|
|
add tmp2, tmp ; \
|
|
mov.l @tmp, tmp2 ; \
|
|
bra 98f ; \
|
|
mov #FUTEX_PRIVATE_FLAG, tmp ; \
|
|
99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \
|
|
98: extu.b tmp, tmp ; \
|
|
xor tmp, reg ; \
|
|
and tmp2, reg ; \
|
|
mov #FUTEX_WAKE, tmp ; \
|
|
or tmp, reg
|
|
#endif
|
|
|
|
.globl __lll_lock_wait_private
|
|
.type __lll_lock_wait_private,@function
|
|
.hidden __lll_lock_wait_private
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_lock_wait_private:
|
|
mov.l r8, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r8, 0)
|
|
mov r4, r6
|
|
mov r5, r8
|
|
mov #0, r7 /* No timeout. */
|
|
LOAD_PRIVATE_FUTEX_WAIT (r5, r0, r1)
|
|
|
|
mov #2, r4
|
|
cmp/eq r4, r6
|
|
bf 2f
|
|
|
|
1:
|
|
mov r8, r4
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
|
|
2:
|
|
mov #2, r6
|
|
XCHG (r6, @r8, r2)
|
|
tst r2, r2
|
|
bf 1b
|
|
|
|
mov.l @r15+, r8
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r8)
|
|
rts
|
|
mov r2, r0
|
|
cfi_endproc
|
|
.size __lll_lock_wait_private,.-__lll_lock_wait_private
|
|
|
|
#ifdef NOT_IN_libc
|
|
.globl __lll_lock_wait
|
|
.type __lll_lock_wait,@function
|
|
.hidden __lll_lock_wait
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_lock_wait:
|
|
mov.l r9, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r9, 0)
|
|
mov.l r8, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r8, 0)
|
|
mov r6, r9
|
|
mov r4, r6
|
|
mov r5, r8
|
|
mov #0, r7 /* No timeout. */
|
|
mov r9, r5
|
|
LOAD_FUTEX_WAIT (r5, r0, r1)
|
|
|
|
mov #2, r4
|
|
cmp/eq r4, r6
|
|
bf 2f
|
|
|
|
1:
|
|
mov r8, r4
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
|
|
2:
|
|
mov #2, r6
|
|
XCHG (r6, @r8, r2)
|
|
tst r2, r2
|
|
bf 1b
|
|
|
|
mov.l @r15+, r8
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r8)
|
|
mov.l @r15+, r9
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r9)
|
|
ret
|
|
mov r2, r0
|
|
cfi_endproc
|
|
.size __lll_lock_wait,.-__lll_lock_wait
|
|
|
|
/* r5 (r8): futex
|
|
r7 (r11): flags
|
|
r6 (r9): timeout
|
|
r4 (r10): futex value
|
|
*/
|
|
.globl __lll_timedlock_wait
|
|
.type __lll_timedlock_wait,@function
|
|
.hidden __lll_timedlock_wait
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_timedlock_wait:
|
|
mov.l r12, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r12, 0)
|
|
|
|
# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
|
|
mov.l .Lhave, r1
|
|
# ifdef PIC
|
|
mova .Lgot, r0
|
|
mov.l .Lgot, r12
|
|
add r0, r12
|
|
add r12, r1
|
|
# endif
|
|
mov.l @r1, r0
|
|
tst r0, r0
|
|
bt .Lreltmo
|
|
# endif
|
|
|
|
/* if (timeout->tv_sec < 0) return ETIMEDOUT; */
|
|
mov.l @r6, r1
|
|
cmp/pz r1
|
|
bf/s 5f
|
|
mov #ETIMEDOUT, r0
|
|
|
|
mov r4, r2
|
|
mov r5, r4
|
|
mov r7, r5
|
|
mov r6, r7
|
|
LOAD_FUTEX_WAIT_ABS (r5, r0, r1)
|
|
|
|
mov #2, r6
|
|
cmp/eq r6, r2
|
|
bf/s 2f
|
|
mov r6, r2
|
|
|
|
1:
|
|
mov #2, r6
|
|
mov #-1, r1
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x16
|
|
SYSCALL_INST_PAD
|
|
mov r0, r6
|
|
|
|
2:
|
|
XCHG (r2, @r4, r3) /* NB: lock is implied */
|
|
|
|
tst r3, r3
|
|
bt/s 3f
|
|
mov r6, r0
|
|
|
|
cmp/eq #-ETIMEDOUT, r0
|
|
bt 4f
|
|
cmp/eq #-EINVAL, r0
|
|
bf 1b
|
|
4:
|
|
neg r0, r3
|
|
3:
|
|
mov r3, r0
|
|
5:
|
|
rts
|
|
mov.l @r15+, r12
|
|
/* Omit CFI for restore in delay slot. */
|
|
|
|
# ifndef __ASSUME_FUTEX_CLOCK_REALTIME
|
|
.align 2
|
|
# ifdef PIC
|
|
.Lgot:
|
|
.long _GLOBAL_OFFSET_TABLE_
|
|
.Lhave:
|
|
.long __have_futex_clock_realtime@GOTOFF
|
|
# else
|
|
.Lhave:
|
|
.long __have_futex_clock_realtime
|
|
# endif
|
|
|
|
.Lreltmo:
|
|
/* Check for a valid timeout value. */
|
|
mov.l @(4,r6), r1
|
|
mov.l .L1g, r0
|
|
cmp/hs r0, r1
|
|
bt 3f
|
|
|
|
cfi_remember_state
|
|
|
|
mov.l r11, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r11, 0)
|
|
mov.l r10, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r10, 0)
|
|
mov.l r9, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r9, 0)
|
|
mov.l r8, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r8, 0)
|
|
mov r7, r11
|
|
mov r4, r10
|
|
mov r6, r9
|
|
mov r5, r8
|
|
|
|
/* Stack frame for the timespec and timeval structs. */
|
|
add #-8, r15
|
|
cfi_adjust_cfa_offset(8)
|
|
|
|
mov #2, r2
|
|
XCHG (r2, @r8, r3)
|
|
|
|
tst r3, r3
|
|
bt 6f
|
|
|
|
1:
|
|
/* Get current time. */
|
|
mov r15, r4
|
|
mov #0, r5
|
|
mov #__NR_gettimeofday, r3
|
|
trapa #0x12
|
|
SYSCALL_INST_PAD
|
|
|
|
/* Compute relative timeout. */
|
|
mov.l @(4,r15), r0
|
|
mov.w .L1k, r1
|
|
dmulu.l r0, r1 /* Micro seconds to nano seconds. */
|
|
mov.l @r9, r2
|
|
mov.l @(4,r9), r3
|
|
mov.l @r15, r0
|
|
sts macl, r1
|
|
sub r0, r2
|
|
clrt
|
|
subc r1, r3
|
|
bf 4f
|
|
mov.l .L1g, r1
|
|
add r1, r3
|
|
add #-1, r2
|
|
4:
|
|
cmp/pz r2
|
|
bf 2f /* Time is already up. */
|
|
|
|
mov.l r2, @r15 /* Store relative timeout. */
|
|
mov.l r3, @(4,r15)
|
|
|
|
mov r8, r4
|
|
mov r11, r5
|
|
LOAD_FUTEX_WAIT (r5, r0, r1)
|
|
mov r10, r6
|
|
mov r15, r7
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
mov r0, r5
|
|
|
|
mov #2, r2
|
|
XCHG (r2, @r8, r3)
|
|
|
|
tst r3, r3
|
|
bt/s 6f
|
|
mov #-ETIMEDOUT, r1
|
|
cmp/eq r5, r1
|
|
bf 1b
|
|
|
|
2: mov #ETIMEDOUT, r3
|
|
|
|
6:
|
|
add #8, r15
|
|
cfi_adjust_cfa_offset (-8)
|
|
mov.l @r15+, r8
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r8)
|
|
mov.l @r15+, r9
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r9)
|
|
mov.l @r15+, r10
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r10)
|
|
mov.l @r15+, r11
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r11)
|
|
mov.l @r15+, r12
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r12)
|
|
rts
|
|
mov r3, r0
|
|
|
|
cfi_restore_state
|
|
|
|
3:
|
|
mov.l @r15+, r12
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (r12)
|
|
rts
|
|
mov #EINVAL, r0
|
|
# endif
|
|
cfi_endproc
|
|
|
|
.L1k:
|
|
.word 1000
|
|
.align 2
|
|
.L1g:
|
|
.long 1000000000
|
|
|
|
.size __lll_timedlock_wait,.-__lll_timedlock_wait
|
|
#endif
|
|
|
|
.globl __lll_unlock_wake_private
|
|
.type __lll_unlock_wake_private,@function
|
|
.hidden __lll_unlock_wake_private
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_unlock_wake_private:
|
|
LOAD_PRIVATE_FUTEX_WAKE (r5, r0, r1)
|
|
mov #1, r6 /* Wake one thread. */
|
|
mov #0, r7
|
|
mov.l r7, @r4 /* Stores 0. */
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
rts
|
|
nop
|
|
cfi_endproc
|
|
.size __lll_unlock_wake_private,.-__lll_unlock_wake_private
|
|
|
|
#ifdef NOT_IN_libc
|
|
.globl __lll_unlock_wake
|
|
.type __lll_unlock_wake,@function
|
|
.hidden __lll_unlock_wake
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_unlock_wake:
|
|
LOAD_FUTEX_WAKE (r5, r0, r1)
|
|
mov #1, r6 /* Wake one thread. */
|
|
mov #0, r7
|
|
mov.l r7, @r4 /* Stores 0. */
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
rts
|
|
nop
|
|
cfi_endproc
|
|
.size __lll_unlock_wake,.-__lll_unlock_wake
|
|
|
|
.globl __lll_timedwait_tid
|
|
.type __lll_timedwait_tid,@function
|
|
.hidden __lll_timedwait_tid
|
|
.align 5
|
|
cfi_startproc
|
|
__lll_timedwait_tid:
|
|
mov.l r9, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r9, 0)
|
|
mov.l r8, @-r15
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_rel_offset (r8, 0)
|
|
mov r4, r8
|
|
mov r5, r9
|
|
|
|
/* Stack frame for the timespec and timeval structs. */
|
|
add #-8, r15
|
|
cfi_adjust_cfa_offset(8)
|
|
|
|
2:
|
|
/* Get current time. */
|
|
mov r15, r4
|
|
mov #0, r5
|
|
mov #__NR_gettimeofday, r3
|
|
trapa #0x12
|
|
SYSCALL_INST_PAD
|
|
|
|
/* Compute relative timeout. */
|
|
mov.l @(4,r15), r0
|
|
mov.w .L1k2, r1
|
|
dmulu.l r0, r1 /* Micro seconds to nano seconds. */
|
|
mov.l @r9, r2
|
|
mov.l @(4,r9), r3
|
|
mov.l @r15, r0
|
|
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
|