diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S new file mode 100644 index 0000000000..350a935388 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S @@ -0,0 +1,221 @@ +/* Copyright (C) 2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <tls.h> +#include "lowlevel-atomic.h" + + .text + +#define SYS_gettimeofday __NR_gettimeofday +#define SYS_futex 240 +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + +#define ETIMEDOUT 110 + + + .globl __lll_lock_wait + .type __lll_lock_wait,@function + .hidden __lll_lock_wait + .align 5 +__lll_lock_wait: + mov r4, r6 + mov r5, r4 + mov #0, r7 /* No timeout. */ + mov #FUTEX_WAIT, r5 +2: + add #-1, r6 /* account for the preceeded xadd. */ + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + + mov #-1, r3 + XADD (r3, @r4, r2) + tst r3, r3 + bf/s 2b + mov r2, r6 + + mov #-1, r1 + mov.l r1, @r4 + rts + mov r2, r0 + .size __lll_lock_wait,.-__lll_lock_wait + + + .type lll_unlock_wake_cb,@function + .align 5 +lll_unlock_wake_cb: + + .align 2 + mova 1f, r0 + mov r15, r1 + mov #-6, r15 +0: + mov.l @r4, r2 + add #1, r2 + mov.l r2, @r4 +1: + mov r1, r15 + cmp/pl r2 + bf 2f + rts + nop + .size lll_unlock_wake_cb,.-lll_unlock_wake_cb + + + .globl __lll_unlock_wake + .type __lll_unlock_wake,@function + .hidden __lll_unlock_wake +__lll_unlock_wake: +2: + mov #FUTEX_WAKE, r5 + mov #1, r6 /* Wake one thread. */ + mov #0, r7 + mov.l r6, @r4 /* Stores 1. */ + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + rts + nop + .size __lll_unlock_wake,.-__lll_unlock_wake + + + .globl __lll_wait_tid + .type __lll_wait_tid,@function + .hidden __lll_wait_tid +__lll_wait_tid: + mov.l @r4, r6 +1: + mov #FUTEX_WAIT, r5 + mov #0, r7 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + + mov r0, r1 + + mov.l @r4, r0 + tst r0, r0 + bf/s 1b + mov r0, r6 + rts + nop + .size __lll_wait_tid,.-__lll_wait_tid + + + .globl __lll_timedwait_tid + .type __lll_timedwait_tid,@function + .hidden __lll_timedwait_tid +__lll_timedwait_tid: + mov.l r9, @-r15 + mov.l r8, @-r15 + mov r4, r8 + mov r5, r9 + add #-8, r15 + +2: + /* Get current time. */ + mov r15, r4 + mov #0, r5 + mov #SYS_gettimeofday, r3 + trapa #0x12 + SYSCALL_INST_PAD + + /* Compute relative timeout. */ + mov.l @(4,r15), r0 + mov.w .L1k, r1 + dmulu.l r0, r1 /* Milli 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 .L1g, 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, r6 + tst r6, r6 + bt 4f + + mov r8, r4 + mov #FUTEX_WAIT, r5 + mov r15, r7 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + + mov r0, r1 + + mov.l @r8, r0 + tst r0, r0 + bf 1f +4: + mov #0, r0 +3: + add #8, r15 + mov.l @r15+, r8 + rts + mov.l @r15+, r9 + +1: + mov #-ETIMEDOUT, r1 + cmp/eq r0, r1 + bf 2b +6: + bra 3b + mov #ETIMEDOUT, r0 + +.L1k: + .word 1000 + .align 2 +.L1g: + .long 1000000000 + + .size __lll_timedwait_tid,.-__lll_timedwait_tid + + + .globl __lll_wake_tid + .type __lll_wake_tid,@function + .hidden __lll_wake_tid +__lll_wake_tid: + mov #FUTEX_WAKE, r5 + mov #-1, r6 + shlr r6 /* r6 = 0x7fffffff */ + mov #0, r7 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + rts + nop + .size __lll_wake_tid,.-__lll_wake_tid |