From dd26c44403582fdf10d663170f947dfe4b3207a0 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Wed, 22 Apr 2015 14:21:39 -0300 Subject: Consolidate sched_getcpu This patch consolidates the sched_getcpu implementations across all arches (except tile, which requires its own). This patch removes the powerpc, x86_64 and x32 specific files and change the default linux one to use INLINE_VSYSCALL where possible (for ports that implements it). --- sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h | 1 + sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 1 + sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c | 29 --------- sysdeps/unix/sysv/linux/sched_getcpu.c | 6 +- sysdeps/unix/sysv/linux/x86/libc-vdso.h | 2 + sysdeps/unix/sysv/linux/x86_64/init-first.c | 4 -- sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S | 74 ---------------------- sysdeps/unix/sysv/linux/x86_64/sysdep.h | 1 + sysdeps/unix/sysv/linux/x86_64/x32/Makefile | 4 -- sysdeps/unix/sysv/linux/x86_64/x32/init-first.c | 39 ------------ .../sysv/linux/x86_64/x32/sched_getcpu-static.c | 3 - sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu.S | 49 -------------- 12 files changed, 10 insertions(+), 203 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c delete mode 100644 sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S delete mode 100644 sysdeps/unix/sysv/linux/x86_64/x32/init-first.c delete mode 100644 sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu-static.c delete mode 100644 sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu.S (limited to 'sysdeps') diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h index cbce324159..dc56bea49a 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h @@ -165,6 +165,7 @@ /* List of system calls which are supported as vsyscalls. */ # define HAVE_CLOCK_GETRES_VSYSCALL 1 # define HAVE_CLOCK_GETTIME_VSYSCALL 1 +# define HAVE_GETCPU_VSYSCALL 1 # define LOADARGS_0(name, dummy) \ diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h index a727f38ee5..e2014cca39 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -80,6 +80,7 @@ /* List of system calls which are supported as vsyscalls. */ #define HAVE_CLOCK_GETRES_VSYSCALL 1 #define HAVE_CLOCK_GETTIME_VSYSCALL 1 +#define HAVE_GETCPU_VSYSCALL 1 /* Define a macro which expands inline into the wrapper code for a system call. This use is for internal calls that do not need to handle errors diff --git a/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c b/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c deleted file mode 100644 index f93be0119a..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/sched_getcpu.c +++ /dev/null @@ -1,29 +0,0 @@ -/* Copyright (C) 2013-2015 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 - . */ - -#include -#include -#include - -int -sched_getcpu (void) -{ - unsigned int cpu; - int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL); - - return r == -1 ? r : cpu; -} diff --git a/sysdeps/unix/sysv/linux/sched_getcpu.c b/sysdeps/unix/sysv/linux/sched_getcpu.c index 09f0816896..a485d3680e 100644 --- a/sysdeps/unix/sysv/linux/sched_getcpu.c +++ b/sysdeps/unix/sysv/linux/sched_getcpu.c @@ -19,13 +19,17 @@ #include #include +#ifdef HAVE_GETCPU_VSYSCALL +# define HAVE_VSYSCALL +#endif +#include int sched_getcpu (void) { #ifdef __NR_getcpu unsigned int cpu; - int r = INLINE_SYSCALL (getcpu, 3, &cpu, NULL, NULL); + int r = INLINE_VSYSCALL (getcpu, 3, &cpu, NULL, NULL); return r == -1 ? r : cpu; #else diff --git a/sysdeps/unix/sysv/linux/x86/libc-vdso.h b/sysdeps/unix/sysv/linux/x86/libc-vdso.h index fea9c2b7a1..f3a8f077d3 100644 --- a/sysdeps/unix/sysv/linux/x86/libc-vdso.h +++ b/sysdeps/unix/sysv/linux/x86/libc-vdso.h @@ -29,6 +29,8 @@ extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *) attribute_hidden; +extern long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *); + #endif #endif /* _LIBC_VDSO_H */ diff --git a/sysdeps/unix/sysv/linux/x86_64/init-first.c b/sysdeps/unix/sysv/linux/x86_64/init-first.c index b7bdbd17ba..6e2b04030e 100644 --- a/sysdeps/unix/sysv/linux/x86_64/init-first.c +++ b/sysdeps/unix/sysv/linux/x86_64/init-first.c @@ -42,10 +42,6 @@ __vdso_platform_setup (void) VDSO_SYMBOL(clock_gettime) = p; p = _dl_vdso_vsym ("__vdso_getcpu", &linux26); - /* If the vDSO is not available we fall back on the old vsyscall. */ -#define VSYSCALL_ADDR_vgetcpu 0xffffffffff600800 - if (p == NULL) - p = (void *) VSYSCALL_ADDR_vgetcpu; PTR_MANGLE (p); VDSO_SYMBOL(getcpu) = p; } diff --git a/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S b/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S deleted file mode 100644 index b87f803ba7..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S +++ /dev/null @@ -1,74 +0,0 @@ -/* Copyright (C) 2007-2015 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 - . */ - -#include -#include -#define _ERRNO_H 1 -#include -#include - -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgetcpu 0xffffffffff600800 - - -ENTRY (sched_getcpu) - /* Align stack and create local variable for result. */ - sub $0x8, %rsp - cfi_adjust_cfa_offset(8) - - movq %rsp, %rdi - xorl %esi, %esi - movl $VGETCPU_CACHE_OFFSET, %edx - addq %fs:0, %rdx - -#ifdef SHARED - movq __vdso_getcpu(%rip), %rax - PTR_DEMANGLE (%rax) - callq *%rax -#else -# ifdef __NR_getcpu - movl $__NR_getcpu, %eax - syscall -# ifndef __ASSUME_GETCPU_SYSCALL - cmpq $-ENOSYS, %rax - jne 1f -# endif -# endif -# ifndef __ASSUME_GETCPU_SYSCALL - movq $VSYSCALL_ADDR_vgetcpu, %rax - callq *%rax -1: -# else -# ifndef __NR_getcpu -# error "cannot happen" -# endif -# endif -#endif - - /* Local variable is result if the call is successful. */ - movl (%rsp), %edx - /* Restore stack pointer before we might jump to - SYSCALL_ERROR_LABEL which returns to the caller. */ - add $0x8, %rsp - cfi_adjust_cfa_offset(-8) - - cmpq $-4095, %rax - jae SYSCALL_ERROR_LABEL - - movl %edx, %eax - ret -PSEUDO_END(sched_getcpu) diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index bea3192466..5a62cce467 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -255,6 +255,7 @@ /* List of system calls which are supported as vsyscalls. */ # define HAVE_CLOCK_GETTIME_VSYSCALL 1 # define HAVE_GETTIMEOFDAY_VSYSCALL 1 +# define HAVE_GETCPU_VSYSCALL 1 # define LOAD_ARGS_0() # define LOAD_REGS_0 diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/Makefile b/sysdeps/unix/sysv/linux/x86_64/x32/Makefile index ecbdefb2d3..8c3253bc90 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/Makefile +++ b/sysdeps/unix/sysv/linux/x86_64/x32/Makefile @@ -4,7 +4,3 @@ default-abi := x32 ifeq ($(subdir),misc) sysdep_routines += arch_prctl endif - -ifeq ($(subdir),posix) -sysdep_routines += getcpu sched_getcpu-static -endif diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/init-first.c b/sysdeps/unix/sysv/linux/x86_64/x32/init-first.c deleted file mode 100644 index 31ec80f412..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/x32/init-first.c +++ /dev/null @@ -1,39 +0,0 @@ -/* Initialization code run first thing by the ELF startup code. Linux/x32. - Copyright (C) 2012-2015 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 - . */ - -#ifdef SHARED -# include -# include - -long int (*__vdso_clock_gettime) (clockid_t, struct timespec *) - attribute_hidden; - -static inline void -_libc_vdso_platform_setup (void) -{ - PREPARE_VERSION (linux26, "LINUX_2.6", 61765110); - - void *p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26); - PTR_MANGLE (p); - __vdso_clock_gettime = p; -} - -# define VDSO_SETUP _libc_vdso_platform_setup -#endif - -#include diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu-static.c b/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu-static.c deleted file mode 100644 index 38bbf9abdb..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu-static.c +++ /dev/null @@ -1,3 +0,0 @@ -#ifndef SHARED -#include "../../sched_getcpu.c" -#endif diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu.S b/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu.S deleted file mode 100644 index 35ad01be01..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/x32/sched_getcpu.S +++ /dev/null @@ -1,49 +0,0 @@ -/* Copyright (C) 2012-2015 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 - . */ - -#ifdef SHARED -#include -#include -#define _ERRNO_H 1 -#include - -ENTRY (sched_getcpu) - /* Align stack and create local variable for result. */ - sub $0x8, %esp - cfi_adjust_cfa_offset(8) - - mov %esp, %edi - xor %esi, %esi - mov $VGETCPU_CACHE_OFFSET, %edx - add %fs:0, %edx - - call __getcpu - - /* Local variable is result if the call is successful. */ - mov (%rsp), %edx - /* Restore stack pointer before we might jump to - SYSCALL_ERROR_LABEL which returns to the caller. */ - add $0x8, %esp - cfi_adjust_cfa_offset(-8) - - cmp $-4095, %eax - jae SYSCALL_ERROR_LABEL - - mov %edx, %eax - ret -PSEUDO_END(sched_getcpu) -#endif -- cgit 1.4.1