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/*
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* QEMU low level functions
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*
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* Copyright (c) 2003 Fabrice Bellard
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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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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#ifdef HOST_SOLARIS
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#include <sys/types.h> |
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#include <sys/statvfs.h> |
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#endif
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#include "cpu.h" |
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#if defined(USE_KQEMU)
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#include "vl.h" |
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#endif
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#ifdef _WIN32
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#include <windows.h> |
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#elif defined(_BSD)
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#include <stdlib.h> |
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#else
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#include <malloc.h> |
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#endif
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void *get_mmap_addr(unsigned long size) |
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{ |
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return NULL; |
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} |
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void qemu_free(void *ptr) |
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{ |
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free(ptr); |
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} |
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void *qemu_malloc(size_t size)
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{ |
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return malloc(size);
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} |
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#if defined(_WIN32)
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void *qemu_vmalloc(size_t size)
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{ |
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/* FIXME: this is not exactly optimal solution since VirtualAlloc
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has 64Kb granularity, but at least it guarantees us that the
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memory is page aligned. */
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return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); |
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} |
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void qemu_vfree(void *ptr) |
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{ |
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VirtualFree(ptr, 0, MEM_RELEASE);
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} |
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#else
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#if defined(USE_KQEMU)
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#include <sys/vfs.h> |
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#include <sys/mman.h> |
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#include <fcntl.h> |
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void *kqemu_vmalloc(size_t size)
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{ |
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static int phys_ram_fd = -1; |
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static int phys_ram_size = 0; |
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const char *tmpdir; |
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char phys_ram_file[1024]; |
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void *ptr;
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#ifdef HOST_SOLARIS
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struct statvfs stfs;
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#else
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struct statfs stfs;
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#endif
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if (phys_ram_fd < 0) { |
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tmpdir = getenv("QEMU_TMPDIR");
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if (!tmpdir)
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#ifdef HOST_SOLARIS
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tmpdir = "/tmp";
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if (statvfs(tmpdir, &stfs) == 0) { |
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#else
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tmpdir = "/dev/shm";
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if (statfs(tmpdir, &stfs) == 0) { |
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#endif
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int64_t free_space; |
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int ram_mb;
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extern int ram_size; |
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free_space = (int64_t)stfs.f_bavail * stfs.f_bsize; |
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if ((ram_size + 8192 * 1024) >= free_space) { |
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ram_mb = (ram_size / (1024 * 1024)); |
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fprintf(stderr, |
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"You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
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tmpdir, ram_mb); |
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if (strcmp(tmpdir, "/dev/shm") == 0) { |
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fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
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"umount /dev/shm\n"
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"mount -t tmpfs -o size=%dm none /dev/shm\n",
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ram_mb + 16);
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} else {
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fprintf(stderr, |
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"Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
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"QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
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"temporary RAM file will be opened.\n");
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} |
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fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
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exit(1);
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} |
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} |
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snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
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tmpdir); |
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phys_ram_fd = mkstemp(phys_ram_file); |
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if (phys_ram_fd < 0) { |
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fprintf(stderr, |
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"warning: could not create temporary file in '%s'.\n"
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"Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
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"Using '/tmp' as fallback.\n",
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tmpdir); |
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snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
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"/tmp");
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phys_ram_fd = mkstemp(phys_ram_file); |
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if (phys_ram_fd < 0) { |
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fprintf(stderr, "Could not create temporary memory file '%s'\n",
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phys_ram_file); |
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exit(1);
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} |
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} |
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unlink(phys_ram_file); |
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} |
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size = (size + 4095) & ~4095; |
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ftruncate(phys_ram_fd, phys_ram_size + size); |
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ptr = mmap(NULL,
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size, |
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PROT_WRITE | PROT_READ, MAP_SHARED, |
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phys_ram_fd, phys_ram_size); |
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if (ptr == MAP_FAILED) {
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fprintf(stderr, "Could not map physical memory\n");
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exit(1);
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} |
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phys_ram_size += size; |
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return ptr;
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} |
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void kqemu_vfree(void *ptr) |
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{ |
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/* may be useful some day, but currently we do not need to free */
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} |
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#endif
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/* alloc shared memory pages */
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void *qemu_vmalloc(size_t size)
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{ |
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#if defined(USE_KQEMU)
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if (kqemu_allowed)
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return kqemu_vmalloc(size);
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#endif
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#ifdef _BSD
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return valloc(size);
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#else
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return memalign(4096, size); |
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#endif
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} |
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void qemu_vfree(void *ptr) |
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{ |
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#if defined(USE_KQEMU)
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if (kqemu_allowed)
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kqemu_vfree(ptr); |
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#endif
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free(ptr); |
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} |
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#endif
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void *qemu_mallocz(size_t size)
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{ |
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void *ptr;
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ptr = qemu_malloc(size); |
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if (!ptr)
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return NULL; |
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memset(ptr, 0, size);
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return ptr;
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} |
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char *qemu_strdup(const char *str) |
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{ |
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char *ptr;
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ptr = qemu_malloc(strlen(str) + 1);
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if (!ptr)
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return NULL; |
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strcpy(ptr, str); |
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return ptr;
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} |