From 2a544d82ce6d7214cf1f95a9b8b814ce40e97253 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 11 Mar 2003 04:07:00 +0000 Subject: Update. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (__lll_mutex_lock_wait): Reverse order of first two parameters. (__lll_mutex_timedlock_wait): Likewise. (lll_mutex_lock): Adjust asm for that. (lll_mutex_timedlock): Likewise. Mark cx, cc, r10 as clobbered. (lll_lock): Adjust asm for operand order change. * sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S: New file. * sysdeps/unix/sysv/linux/x86_64/libc-lowlevelmutex.S: New file. --- .../unix/sysv/linux/x86_64/libc-lowlevelmutex.S | 30 ++++ nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S | 2 +- nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h | 16 +- .../sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S | 164 +++++++++++++++++++++ 4 files changed, 203 insertions(+), 9 deletions(-) create mode 100644 nptl/sysdeps/unix/sysv/linux/x86_64/libc-lowlevelmutex.S create mode 100644 nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64') diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/libc-lowlevelmutex.S b/nptl/sysdeps/unix/sysv/linux/x86_64/libc-lowlevelmutex.S new file mode 100644 index 0000000000..a4ce9c2fee --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/libc-lowlevelmutex.S @@ -0,0 +1,30 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2002. + + 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. */ + +/* In libc.so we do not unconditionally use the lock prefix. Only if + the application is using threads. */ +#ifndef UP +# define LOCK \ + cmpl $0, __libc_multiple_threads_ptr(%rip); \ + je 0f; \ + lock; \ +0: +#endif + +#include "lowlevelmutex.S" diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index ea9667d956..e7e1707a48 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -127,7 +127,7 @@ __lll_timedwait_tid: /* Compute relative timeout. */ movq 8(%esp), %rax movq $1000, %rdi - mul %rdx /* Milli seconds to nano seconds. */ + mul %rdi /* Milli seconds to nano seconds. */ movq (%r9), %rdi movq 8(%r9), %rsi subq (%rsp), %rdi diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h index fa472baeea..f7e9450a1a 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h @@ -42,10 +42,10 @@ /* Does not preserve %eax and %ecx. */ -extern int __lll_mutex_lock_wait (int val, int *__futex) attribute_hidden; +extern int __lll_mutex_lock_wait (int *__futex, int __val) attribute_hidden; /* Does not preserver %eax, %ecx, and %edx. */ -extern int __lll_mutex_timedlock_wait (int val, int *__futex, - const struct timespec *abstime) +extern int __lll_mutex_timedlock_wait (int *__futex, int __val, + const struct timespec *__abstime) attribute_hidden; /* Preserves all registers but %eax. */ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden; @@ -71,7 +71,7 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden; "jmp 2f\n\t" \ ".previous\n" \ "2:" \ - : "=D" (ignore1), "=&S" (ignore2), "=m" (futex) \ + : "=S" (ignore1), "=&D" (ignore2), "=m" (futex) \ : "0" (1), "2" (futex) \ : "memory"); }) @@ -82,8 +82,8 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden; "testl %0, %0\n\t" \ "jne 1f\n\t" \ ".subsection 1\n" \ - "1:\tmovl %0, %%edi\n\t" \ - "leaq %4, %%rsi\n\t" \ + "1:\tmovl %0, %%esi\n\t" \ + "leaq %4, %%rdi\n\t" \ "movq %7, %%rdx\n\t" \ "call __lll_mutex_timedlock_wait\n\t" \ "jmp 2f\n\t" \ @@ -92,7 +92,7 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden; : "=a" (result), "=&D" (ignore1), "=&S" (ignore2), \ "=&d" (ignore2), "=m" (futex) \ : "0" (1), "4" (futex), "m" (timeout) \ - : "memory"); \ + : "memory", "cx", "cc", "r10"); \ result; }) @@ -157,7 +157,7 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden; "jmp 2f\n\t" \ ".previous\n" \ "2:" \ - : "=D" (ignore1), "=&S" (ignore2), "=m" (futex) \ + : "=S" (ignore1), "=&D" (ignore2), "=m" (futex) \ : "0" (-1), "2" (futex) \ : "memory"); }) diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S new file mode 100644 index 0000000000..a494e0efaa --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelmutex.S @@ -0,0 +1,164 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2002. + + 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 + + .text + +#ifndef LOCK +# ifdef UP +# define LOCK +# else +# define LOCK lock +# endif +#endif + +#define SYS_gettimeofday __NR_gettimeofday +#define SYS_futex 202 +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + +#define EWOULDBLOCK 11 +#define EINVAL 22 +#define ETIMEDOUT 110 + + + .globl __lll_mutex_lock_wait + .type __lll_mutex_lock_wait,@function + .hidden __lll_mutex_lock_wait + .align 16 +__lll_mutex_lock_wait: + pushq %r10 + pushq %rdx + + xorq %r10, %r10 /* No timeout. */ + +1: + leal 1(%esi), %edx /* account for the preceeded xadd. */ + movq %r10, %rsi /* movl $FUTEX_WAIT, %ecx */ + movq $SYS_futex, %rax + syscall + + movl $1, %esi + LOCK + xaddl %esi, (%rdi) + testl %esi, %esi + jne 1b + + movl $2, (%rdi) + + popq %rdx + popq %r10 + retq + .size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait + + +#ifdef NOT_IN_libc + .globl __lll_mutex_timedlock_wait + .type __lll_mutex_timedlock_wait,@function + .hidden __lll_mutex_timedlock_wait + .align 16 +__lll_mutex_timedlock_wait: + /* Check for a valid timeout value. */ + cmpq $1000000000, 4(%rdx) + jae 3f + + /* Stack frame for the timespec and timeval structs. */ + subq $16, %rsp + + movq %rdi, %r8 + movq %rdx, %r9 + leal 1(%eax), %edx + + /* Get current time. */ +1: + movq %rsp, %rdi + xorq %rsi, %rsi + movq $SYS_gettimeofday, %rax + syscall + + /* Compute relative timeout. */ + movq 8(%esp), %rax + movq $1000, %rdi + mul %rdi /* Milli seconds to nano seconds. */ + movq (%r9), %rdi + movq 8(%r9), %rsi + subq (%rsp), %rdi + subq %rax, %rsi + jns 4f + addq $1000000000, %rsi + decq %rdi +4: testq %rdi, %rdi + js 5f /* Time is already up. */ + + /* Futex call. */ + movq %rdi, (%rsp) /* Store relative timeout. */ + movq %rsi, 4(%rsp) + + movq %rsp, %r10 + xorq %rsi, %rsi /* movq $FUTEX_WAIT, %rsi */ + movq %r8, %rdi + movq $SYS_futex, %rax + syscall + + movl $1, %edx + LOCK + xaddl %edx, (%rdi) + testl %edx, %edx + jne 7f + + movl $2, (%rdi) + xorl %eax, %eax + + addq $16, %rsp + retq + + /* Check whether the time expired. */ +7: cmpq $-ETIMEDOUT, %rax + je 5f + jmp 1b + +3: movl $EINVAL, %eax + retq + +5: movl $ETIMEDOUT, %eax + addq $16, %rsp + retq + .size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait +#endif + + + .globl __lll_mutex_unlock_wake + .type __lll_mutex_unlock_wake,@function + .hidden __lll_mutex_unlock_wake + .align 16 +__lll_mutex_unlock_wake: + pushq %rsi + pushq %rdx + + movl $0, (%rdi) + movq $FUTEX_WAKE, %rsi + movl $1, %edx /* Wake one thread. */ + movq $SYS_futex, %rax + syscall + + popq %rdx + popq %rsi + retq + .size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake -- cgit 1.4.1