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numactl
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v2.0.12
syscall.c
266 строк
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dann frazier
Allow building on ARM systems
17 апр 2018, 22:16
17 апр 2018, 22:16
e13c9a8
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/* Copyright (C) 2003,2004 Andi Kleen, SuSE Labs. libnuma 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; version 2.1. libnuma 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 find a copy of v2.1 of the GNU Lesser General Public License somewhere on your Linux system; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <unistd.h> #include <sys/types.h> #include <asm/unistd.h> #include <errno.h> #include "numa.h" #include "numaif.h" #include "numaint.h" #define WEAK __attribute__((weak)) #if !defined(__NR_mbind) || !defined(__NR_set_mempolicy) || \ !defined(__NR_get_mempolicy) || !defined(__NR_migrate_pages) || \ !defined(__NR_move_pages) #if defined(__x86_64__) #define __NR_sched_setaffinity 203 #define __NR_sched_getaffinity 204 /* Official allocation */ #define __NR_mbind 237 #define __NR_set_mempolicy 238 #define __NR_get_mempolicy 239 #define __NR_migrate_pages 256 #define __NR_move_pages 279 #elif defined(__ia64__) #define __NR_sched_setaffinity 1231 #define __NR_sched_getaffinity 1232 #define __NR_migrate_pages 1280 #define __NR_move_pages 1276 /* Official allocation */ #define __NR_mbind 1259 #define __NR_get_mempolicy 1260 #define __NR_set_mempolicy 1261 #elif defined(__i386__) #define __NR_mbind 274 #define __NR_get_mempolicy 275 #define __NR_set_mempolicy 276 #define __NR_migrate_pages 294 #define __NR_move_pages 317 #elif defined(__powerpc__) #define __NR_mbind 259 #define __NR_get_mempolicy 260 #define __NR_set_mempolicy 261 #define __NR_migrate_pages 258 /* FIXME: powerpc is missing move pages!!! #define __NR_move_pages xxx */ #elif defined(__mips__) #if _MIPS_SIM == _ABIO32 /* * Linux o32 style syscalls are in the range from 4000 to 4999. */ #define __NR_Linux 4000 #define __NR_mbind (__NR_Linux + 268) #define __NR_get_mempolicy (__NR_Linux + 269) #define __NR_set_mempolicy (__NR_Linux + 270) #define __NR_migrate_pages (__NR_Linux + 287) #endif #if _MIPS_SIM == _ABI64 /* * Linux 64-bit syscalls are in the range from 5000 to 5999. */ #define __NR_Linux 5000 #define __NR_mbind (__NR_Linux + 227) #define __NR_get_mempolicy (__NR_Linux + 228) #define __NR_set_mempolicy (__NR_Linux + 229) #define __NR_migrate_pages (__NR_Linux + 246) #endif #if _MIPS_SIM == _ABIN32 /* * Linux N32 syscalls are in the range from 6000 to 6999. */ #define __NR_Linux 6000 #define __NR_mbind (__NR_Linux + 231) #define __NR_get_mempolicy (__NR_Linux + 232) #define __NR_set_mempolicy (__NR_Linux + 233) #define __NR_migrate_pages (__NR_Linux + 250) #endif #elif defined(__hppa__) #define __NR_migrate_pages 272 #elif defined(__arm__) /* https://bugs.debian.org/796802 */ #warning "ARM does not implement the migrate_pages() syscall" #elif !defined(DEPS_RUN) #error "Add syscalls for your architecture or update kernel headers" #endif #endif #ifndef __GLIBC_PREREQ # define __GLIBC_PREREQ(x,y) 0 #endif #if defined(__GLIBC__) && __GLIBC_PREREQ(2, 11) /* glibc 2.11 seems to have working 6 argument sycall. Use the glibc supplied syscall in this case. The version cut-off is rather arbitary and could be probably earlier. */ #define syscall6 syscall #elif defined(__x86_64__) /* 6 argument calls on x86-64 are often buggy in both glibc and asm/unistd.h. Add a working version here. */ long syscall6(long call, long a, long b, long c, long d, long e, long f) { long res; asm volatile ("movq %[d],%%r10 ; movq %[e],%%r8 ; movq %[f],%%r9 ; syscall" : "=a" (res) : "0" (call),"D" (a),"S" (b), "d" (c), [d] "g" (d), [e] "g" (e), [f] "g" (f) : "r11","rcx","r8","r10","r9","memory" ); if (res < 0) { errno = -res; res = -1; } return res; } #elif defined(__i386__) /* i386 has buggy syscall6 in glibc too. This is tricky to do in inline assembly because it clobbers so many registers. Do it out of line. */ asm( "__syscall6:\n" " pushl %ebp\n" " pushl %edi\n" " pushl %esi\n" " pushl %ebx\n" " movl (0+5)*4(%esp),%eax\n" " movl (1+5)*4(%esp),%ebx\n" " movl (2+5)*4(%esp),%ecx\n" " movl (3+5)*4(%esp),%edx\n" " movl (4+5)*4(%esp),%esi\n" " movl (5+5)*4(%esp),%edi\n" " movl (6+5)*4(%esp),%ebp\n" " int $0x80\n" " popl %ebx\n" " popl %esi\n" " popl %edi\n" " popl %ebp\n" " ret" ); extern long __syscall6(long n, long a, long b, long c, long d, long e, long f); long syscall6(long call, long a, long b, long c, long d, long e, long f) { long res = __syscall6(call,a,b,c,d,e,f); if (res < 0) { errno = -res; res = -1; } return res; } #else #define syscall6 syscall #endif long WEAK get_mempolicy(int *policy, unsigned long *nmask, unsigned long maxnode, void *addr, unsigned flags) { return syscall(__NR_get_mempolicy, policy, nmask, maxnode, addr, flags); } long WEAK mbind(void *start, unsigned long len, int mode, const unsigned long *nmask, unsigned long maxnode, unsigned flags) { return syscall6(__NR_mbind, (long)start, len, mode, (long)nmask, maxnode, flags); } long WEAK set_mempolicy(int mode, const unsigned long *nmask, unsigned long maxnode) { long i; i = syscall(__NR_set_mempolicy,mode,nmask,maxnode); return i; } long WEAK migrate_pages(int pid, unsigned long maxnode, const unsigned long *frommask, const unsigned long *tomask) { #if defined(__NR_migrate_pages) return syscall(__NR_migrate_pages, pid, maxnode, frommask, tomask); #else errno = ENOSYS; return -1; #endif } long WEAK move_pages(int pid, unsigned long count, void **pages, const int *nodes, int *status, int flags) { return syscall(__NR_move_pages, pid, count, pages, nodes, status, flags); } /* SLES8 glibc doesn't define those */ int numa_sched_setaffinity_v1(pid_t pid, unsigned len, const unsigned long *mask) { return syscall(__NR_sched_setaffinity,pid,len,mask); } __asm__(".symver numa_sched_setaffinity_v1,numa_sched_setaffinity@libnuma_1.1"); int numa_sched_setaffinity_v2(pid_t pid, struct bitmask *mask) { return syscall(__NR_sched_setaffinity, pid, numa_bitmask_nbytes(mask), mask->maskp); } __asm__(".symver numa_sched_setaffinity_v2,numa_sched_setaffinity@@libnuma_1.2"); int numa_sched_getaffinity_v1(pid_t pid, unsigned len, const unsigned long *mask) { return syscall(__NR_sched_getaffinity,pid,len,mask); } __asm__(".symver numa_sched_getaffinity_v1,numa_sched_getaffinity@libnuma_1.1"); int numa_sched_getaffinity_v2(pid_t pid, struct bitmask *mask) { /* len is length in bytes */ return syscall(__NR_sched_getaffinity, pid, numa_bitmask_nbytes(mask), mask->maskp); /* sched_getaffinity returns sizeof(cpumask_t) */ } __asm__(".symver numa_sched_getaffinity_v2,numa_sched_getaffinity@@libnuma_1.2"); make_internal_alias(numa_sched_getaffinity_v1); make_internal_alias(numa_sched_getaffinity_v2); make_internal_alias(numa_sched_setaffinity_v1); make_internal_alias(numa_sched_setaffinity_v2);