URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libitm/] [config/] [arm/] [hwcap.cc] - Rev 847
Go to most recent revision | Compare with Previous | Blame | View Log
/* Copyright (C) 2011 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU Transactional Memory Library (libitm). Libitm is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Libitm 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 General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* This file initializes GTM_hwcap in some os-specific way to indicate what ISA extensions are present for ARM. */ #include "libitm_i.h" #include "hwcap.h" /* Begin by defaulting to whatever options were given to the compiler. */ int GTM_hwcap HIDDEN = 0 #ifdef __VFP_FP__ | HWCAP_ARM_VFP #endif #ifdef __IWMMXT__ | HWCAP_ARM_IWMMXT #endif ; #ifdef __linux__ #include <unistd.h> #include <sys/fcntl.h> #include <elf.h> static void __attribute__((constructor)) init_gtm_hwcap(void) { int fd = open ("/proc/self/auxv", O_RDONLY); if (fd < 0) return; Elf32_auxv_t pairs[512]; ssize_t rlen = read (fd, pairs, sizeof(pairs)); close (fd); if (rlen < 0) return; size_t n = (size_t)rlen / sizeof(pairs[0]); for (size_t i = 0; i < n; ++i) if (pairs[i].a_type == AT_HWCAP) { GTM_hwcap = pairs[i].a_un.a_val; return; } } #endif
Go to most recent revision | Compare with Previous | Blame | View Log