mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-25 15:28:54 +00:00
53dd82a7ca
Check for the presence of posix_memalign() in the configure script, not using "defined(_POSIX_C_SOURCE) && !defined(__sun__)". This lets qemu use posix_memalign() on NetBSD versions that have it, instead of falling back to valloc() which is wasteful when the required alignment is smaller than a page. Backports commit 9bc5a7193fb422ee53187601eba577ee5d195522 from qemu
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
|
|
* os-posix-lib.c
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
* Copyright (c) 2010 Red Hat, Inc.
|
|
*
|
|
* QEMU library functions on POSIX which are shared between QEMU and
|
|
* the QEMU tools.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#if defined(__linux__) && \
|
|
(defined(__x86_64__) || defined(__arm__) || defined(__aarch64__))
|
|
/* Use 2 MiB alignment so transparent hugepages can be used by KVM.
|
|
Valgrind does not support alignments larger than 1 MiB,
|
|
therefore we need special code which handles running on Valgrind. */
|
|
# define QEMU_VMALLOC_ALIGN (512 * 4096)
|
|
#elif defined(__linux__) && defined(__s390x__)
|
|
/* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
|
|
# define QEMU_VMALLOC_ALIGN (256 * 4096)
|
|
#elif defined(__linux__) && defined(__sparc__)
|
|
#include <sys/shm.h>
|
|
# define QEMU_VMALLOC_ALIGN MAX(getpagesize(), SHMLBA)
|
|
#else
|
|
# define QEMU_VMALLOC_ALIGN getpagesize()
|
|
#endif
|
|
#define HUGETLBFS_MAGIC 0x958458f6
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "unicorn/platform.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include <sys/mman.h>
|
|
#include <libgen.h>
|
|
#include <setjmp.h>
|
|
#include <sys/signal.h>
|
|
#include "qemu/cutils.h"
|
|
|
|
#ifdef CONFIG_LINUX
|
|
#if !defined(__CYGWIN__)
|
|
#include <sys/syscall.h>
|
|
#endif
|
|
#include <sys/vfs.h>
|
|
#endif
|
|
|
|
#ifdef __FreeBSD__
|
|
#include <sys/sysctl.h>
|
|
#include <sys/user.h>
|
|
#endif
|
|
|
|
#include "qemu/mmap-alloc.h"
|
|
|
|
void *qemu_oom_check(void *ptr)
|
|
{
|
|
if (ptr == NULL) {
|
|
fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
|
|
abort();
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
void *qemu_try_memalign(size_t alignment, size_t size)
|
|
{
|
|
void *ptr;
|
|
|
|
if (alignment < sizeof(void*)) {
|
|
alignment = sizeof(void*);
|
|
}
|
|
|
|
#if defined(CONFIG_POSIX_MEMALIGN)
|
|
int ret;
|
|
ret = posix_memalign(&ptr, alignment, size);
|
|
if (ret != 0) {
|
|
errno = ret;
|
|
ptr = NULL;
|
|
}
|
|
#elif defined(CONFIG_BSD)
|
|
ptr = valloc(size);
|
|
#else
|
|
ptr = memalign(alignment, size);
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
void *qemu_memalign(size_t alignment, size_t size)
|
|
{
|
|
return qemu_oom_check(qemu_try_memalign(alignment, size));
|
|
}
|
|
|
|
/* alloc shared memory pages */
|
|
void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
|
|
{
|
|
size_t align = QEMU_VMALLOC_ALIGN;
|
|
void *ptr = qemu_ram_mmap(-1, size, align, false);
|
|
|
|
if (ptr == MAP_FAILED) {
|
|
return NULL;
|
|
}
|
|
|
|
if (alignment) {
|
|
*alignment = align;
|
|
}
|
|
|
|
return ptr;
|
|
}
|
|
|
|
void qemu_vfree(void *ptr)
|
|
{
|
|
free(ptr);
|
|
}
|
|
|
|
void qemu_anon_ram_free(void *ptr, size_t size)
|
|
{
|
|
qemu_ram_munmap(ptr, size);
|
|
}
|