mirror of
https://github.com/yuzu-emu/unicorn.git
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60e8836b74
Tracked down with an ugly, brittle and probably buggy Perl script. Also move includes converted to <...> up so they get included before ours where that's obviously okay. Backports commit a9c94277f07d19d3eb14f199c3e93491aa3eae0e from qemu
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/*
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* os-posix-lib.c
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2010 Red Hat, Inc.
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*
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* QEMU library functions on POSIX which are shared between QEMU and
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* the QEMU tools.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#if defined(__linux__) && \
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(defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
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/* Use 2 MiB alignment so transparent hugepages can be used by KVM.
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Valgrind does not support alignments larger than 1 MiB,
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therefore we need special code which handles running on Valgrind. */
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# define QEMU_VMALLOC_ALIGN (512 * 4096)
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#elif defined(__linux__) && defined(__s390x__)
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/* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
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# define QEMU_VMALLOC_ALIGN (256 * 4096)
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#else
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# define QEMU_VMALLOC_ALIGN getpagesize()
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#endif
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#define HUGETLBFS_MAGIC 0x958458f6
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "unicorn/platform.h"
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#include "sysemu/sysemu.h"
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#include <sys/mman.h>
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#include <libgen.h>
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#include <setjmp.h>
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#include <sys/signal.h>
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#include "qemu/cutils.h"
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#ifdef CONFIG_LINUX
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#if !defined(__CYGWIN__)
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#include <sys/syscall.h>
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#endif
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#include <sys/vfs.h>
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#endif
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#ifdef __FreeBSD__
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#include <sys/sysctl.h>
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#endif
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#include "qemu/mmap-alloc.h"
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void *qemu_oom_check(void *ptr)
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{
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if (ptr == NULL) {
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fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
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abort();
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}
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return ptr;
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}
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void *qemu_try_memalign(size_t alignment, size_t size)
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{
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void *ptr;
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if (alignment < sizeof(void*)) {
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alignment = sizeof(void*);
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}
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#if defined(_POSIX_C_SOURCE) && !defined(__sun__)
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int ret;
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ret = posix_memalign(&ptr, alignment, size);
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if (ret != 0) {
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errno = ret;
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ptr = NULL;
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}
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#elif defined(CONFIG_BSD)
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ptr = valloc(size);
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#else
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ptr = memalign(alignment, size);
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#endif
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return ptr;
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}
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void *qemu_memalign(size_t alignment, size_t size)
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{
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return qemu_oom_check(qemu_try_memalign(alignment, size));
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}
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/* alloc shared memory pages */
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void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
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{
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size_t align = QEMU_VMALLOC_ALIGN;
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void *ptr = qemu_ram_mmap(-1, size, align, false);
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if (ptr == MAP_FAILED) {
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return NULL;
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}
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if (alignment) {
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*alignment = align;
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}
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return ptr;
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}
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void qemu_vfree(void *ptr)
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{
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free(ptr);
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}
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void qemu_anon_ram_free(void *ptr, size_t size)
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{
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qemu_ram_munmap(ptr, size);
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}
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