diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S deleted file mode 100644 index b03173d82..000000000 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S +++ /dev/null @@ -1,262 +0,0 @@ -/* Copyright (C) 2003, 2004, 2007 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 <unwindbuf.h> -#include <sysdep.h> -#include <bits/kernel-features.h> -#include <lowlevellock.h> -#include <tcb-offsets.h> -#include "lowlevel-atomic.h" - - - .comm __fork_generation, 4, 4 - - .text - .globl __pthread_once - .type __pthread_once,@function - .protected __pthread_once - .align 5 - cfi_startproc -__pthread_once: - mov.l @r4, r0 - tst #2, r0 - bt 1f - rts - mov #0, r0 - -1: - mov.l r12, @-r15 - cfi_adjust_cfa_offset (4) - cfi_rel_offset (r12, 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) - sts.l pr, @-r15 - cfi_adjust_cfa_offset (4) - cfi_rel_offset (pr, 0) - mov r5, r8 - mov r4, r9 - - /* Not yet initialized or initialization in progress. - Get the fork generation counter now. */ -6: - mov.l @r4, r1 - mova .Lgot, r0 - mov.l .Lgot, r12 - add r0, r12 - -5: - mov r1, r0 - - tst #2, r0 - bf 4f - - and #3, r0 - mov.l .Lfgen, r2 -#ifdef __PIC__ - add r12, r2 -#endif - mov.l @r2, r3 - or r3, r0 - or #1, r0 - mov r0, r3 - mov r1, r5 - - CMPXCHG (r5, @r4, r3, r2) - bf 5b - - /* Check whether another thread already runs the initializer. */ - mov r2, r0 - tst #1, r0 - bt 3f /* No -> do it. */ - - /* Check whether the initializer execution was interrupted - by a fork. */ - xor r3, r0 - mov #-4, r1 /* -4 = 0xfffffffc */ - tst r1, r0 - bf 3f /* Different for generation -> run initializer. */ - - /* Somebody else got here first. Wait. */ -#ifdef __ASSUME_PRIVATE_FUTEX - mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r5 - extu.b r5, r5 -#else - stc gbr, r1 - mov.w .Lpfoff, r2 - add r2, r1 - mov.l @r1, r5 -# if FUTEX_WAIT != 0 - mov #FUTEX_WAIT, r0 - or r0, r5 -# endif -#endif - mov r3, r6 - mov #0, r7 - mov #SYS_futex, r3 - extu.b r3, r3 - trapa #0x14 - SYSCALL_INST_PAD - bra 6b - nop - - .align 2 -.Lgot: - .long _GLOBAL_OFFSET_TABLE_ -#ifdef __PIC__ -.Lfgen: - .long __fork_generation@GOTOFF -#else -.Lfgen: - .long __fork_generation -#endif - -3: - /* Call the initializer function after setting up the - cancellation handler. Note that it is not possible here - to use the unwind-based cleanup handling. This would require - that the user-provided function and all the code it calls - is compiled with exceptions. Unfortunately this cannot be - guaranteed. */ - add #-UNWINDBUFSIZE, r15 - cfi_adjust_cfa_offset (UNWINDBUFSIZE) - - mov.l .Lsigsetjmp, r1 - mov #UWJMPBUF, r4 - add r15, r4 - bsrf r1 - mov #0, r5 -.Lsigsetjmp0: - tst r0, r0 - bf 7f - - mov.l .Lcpush, r1 - bsrf r1 - mov r15, r4 -.Lcpush0: - - /* Call the user-provided initialization function. */ - jsr @r8 - nop - - /* Pop the cleanup handler. */ - mov.l .Lcpop, r1 - bsrf r1 - mov r15, r4 -.Lcpop0: - - add #UNWINDBUFSIZE, r15 - cfi_adjust_cfa_offset (-UNWINDBUFSIZE) - - /* Sucessful run of the initializer. Signal that we are done. */ - INC (@r9, r2) - /* Wake up all other threads. */ - mov r9, r4 -#ifdef __ASSUME_PRIVATE_FUTEX - mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAKE), r5 - extu.b r5, r5 -#else - stc gbr, r1 - mov.w .Lpfoff, r2 - add r2, r1 - mov.l @r1, r5 - mov #FUTEX_WAKE, r0 - or r0, r5 -#endif - mov #-1, r6 - shlr r6 /* r6 = 0x7fffffff */ - mov #0, r7 - mov #SYS_futex, r3 - extu.b r3, r3 - trapa #0x14 - SYSCALL_INST_PAD - -4: - lds.l @r15+, pr - cfi_adjust_cfa_offset (-4) - cfi_restore (pr) - 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+, r12 - cfi_adjust_cfa_offset (-4) - cfi_restore (r12) - rts - mov #0, r0 - -7: - /* __sigsetjmp returned for the second time. */ - cfi_adjust_cfa_offset (UNWINDBUFSIZE+16) - cfi_offset (r12, -4) - cfi_offset (r9, -8) - cfi_offset (r8, -12) - cfi_offset (pr, -16) - mov #0, r7 - mov.l r7, @r9 - mov r9, r4 -#ifdef __ASSUME_PRIVATE_FUTEX - mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAKE), r5 -#else - stc gbr, r1 - mov.w .Lpfoff, r2 - add r2, r1 - mov.l @r1, r5 - mov #FUTEX_WAKE, r0 - or r0, r5 -#endif - extu.b r5, r5 - mov #-1, r6 - shlr r6 /* r6 = 0x7fffffff */ - mov #SYS_futex, r3 - extu.b r3, r3 - trapa #0x14 - SYSCALL_INST_PAD - - mov.l .Lunext, r1 - bsrf r1 - mov r15, r4 -.Lunext0: - /* NOTREACHED */ - sleep - cfi_endproc - -#ifndef __ASSUME_PRIVATE_FUTEX -.Lpfoff: - .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE -#endif - .align 2 -.Lsigsetjmp: - .long __sigsetjmp@PLT-(.Lsigsetjmp0-.) -.Lcpush: - .long HIDDEN_JUMPTARGET(__pthread_register_cancel)-.Lcpush0 -.Lcpop: - .long HIDDEN_JUMPTARGET(__pthread_unregister_cancel)-.Lcpop0 -.Lunext: - .long HIDDEN_JUMPTARGET(__pthread_unwind_next)-.Lunext0 - .size __pthread_once,.-__pthread_once - - .globl __pthread_once_internal -__pthread_once_internal = __pthread_once - - .globl pthread_once -pthread_once = __pthread_once |