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1 | ea88812f | bellard | /*
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2 | ea88812f | bellard | * QEMU low level functions
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3 | 5fafdf24 | ths | *
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4 | ea88812f | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | 5fafdf24 | ths | *
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6 | ea88812f | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | ea88812f | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | ea88812f | bellard | * in the Software without restriction, including without limitation the rights
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9 | ea88812f | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | ea88812f | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | ea88812f | bellard | * furnished to do so, subject to the following conditions:
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12 | ea88812f | bellard | *
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13 | ea88812f | bellard | * The above copyright notice and this permission notice shall be included in
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14 | ea88812f | bellard | * all copies or substantial portions of the Software.
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15 | ea88812f | bellard | *
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16 | ea88812f | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | ea88812f | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | ea88812f | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | ea88812f | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | ea88812f | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | ea88812f | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | ea88812f | bellard | * THE SOFTWARE.
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23 | ea88812f | bellard | */
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24 | ea88812f | bellard | #include <stdlib.h> |
25 | ea88812f | bellard | #include <stdio.h> |
26 | ea88812f | bellard | #include <stdarg.h> |
27 | ea88812f | bellard | #include <string.h> |
28 | ea88812f | bellard | #include <errno.h> |
29 | ea88812f | bellard | #include <unistd.h> |
30 | aa26bb2d | ths | #include <fcntl.h> |
31 | 605686cd | ths | #ifdef HOST_SOLARIS
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32 | 605686cd | ths | #include <sys/types.h> |
33 | 605686cd | ths | #include <sys/statvfs.h> |
34 | 605686cd | ths | #endif
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35 | ea88812f | bellard | |
36 | 87ecb68b | pbrook | #include "qemu-common.h" |
37 | 87ecb68b | pbrook | #include "sysemu.h" |
38 | ea88812f | bellard | |
39 | 6e4255f6 | bellard | #ifdef _WIN32
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40 | 4fddf62a | ths | #define WIN32_LEAN_AND_MEAN
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41 | 6e4255f6 | bellard | #include <windows.h> |
42 | 6e4255f6 | bellard | #elif defined(_BSD)
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43 | 194884dd | bellard | #include <stdlib.h> |
44 | 194884dd | bellard | #else
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45 | 49b470eb | bellard | #include <malloc.h> |
46 | 194884dd | bellard | #endif
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47 | 49b470eb | bellard | |
48 | 6e4255f6 | bellard | #if defined(_WIN32)
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49 | 33f00271 | balrog | void *qemu_memalign(size_t alignment, size_t size)
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50 | 33f00271 | balrog | { |
51 | 33f00271 | balrog | return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); |
52 | 33f00271 | balrog | } |
53 | 6e4255f6 | bellard | |
54 | 6e4255f6 | bellard | void *qemu_vmalloc(size_t size)
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55 | 6e4255f6 | bellard | { |
56 | 6e4255f6 | bellard | /* FIXME: this is not exactly optimal solution since VirtualAlloc
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57 | 6e4255f6 | bellard | has 64Kb granularity, but at least it guarantees us that the
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58 | 6e4255f6 | bellard | memory is page aligned. */
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59 | 6e4255f6 | bellard | return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); |
60 | 6e4255f6 | bellard | } |
61 | 6e4255f6 | bellard | |
62 | 6e4255f6 | bellard | void qemu_vfree(void *ptr) |
63 | 6e4255f6 | bellard | { |
64 | 6e4255f6 | bellard | VirtualFree(ptr, 0, MEM_RELEASE);
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65 | 6e4255f6 | bellard | } |
66 | 6e4255f6 | bellard | |
67 | 6cb7ee85 | pbrook | #else
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68 | 6cb7ee85 | pbrook | |
69 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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70 | 49b470eb | bellard | |
71 | 6bae7ed8 | bellard | #include <sys/vfs.h> |
72 | 49b470eb | bellard | #include <sys/mman.h> |
73 | 49b470eb | bellard | #include <fcntl.h> |
74 | 49b470eb | bellard | |
75 | 9596ebb7 | pbrook | static void *kqemu_vmalloc(size_t size) |
76 | 49b470eb | bellard | { |
77 | 49b470eb | bellard | static int phys_ram_fd = -1; |
78 | 49b470eb | bellard | static int phys_ram_size = 0; |
79 | 49b470eb | bellard | const char *tmpdir; |
80 | 49b470eb | bellard | char phys_ram_file[1024]; |
81 | 49b470eb | bellard | void *ptr;
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82 | 605686cd | ths | #ifdef HOST_SOLARIS
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83 | 605686cd | ths | struct statvfs stfs;
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84 | 605686cd | ths | #else
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85 | 6bae7ed8 | bellard | struct statfs stfs;
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86 | 605686cd | ths | #endif
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87 | 49b470eb | bellard | |
88 | 49b470eb | bellard | if (phys_ram_fd < 0) { |
89 | 49b470eb | bellard | tmpdir = getenv("QEMU_TMPDIR");
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90 | 49b470eb | bellard | if (!tmpdir)
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91 | 605686cd | ths | #ifdef HOST_SOLARIS
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92 | 605686cd | ths | tmpdir = "/tmp";
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93 | 605686cd | ths | if (statvfs(tmpdir, &stfs) == 0) { |
94 | 605686cd | ths | #else
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95 | 49b470eb | bellard | tmpdir = "/dev/shm";
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96 | 6bae7ed8 | bellard | if (statfs(tmpdir, &stfs) == 0) { |
97 | 605686cd | ths | #endif
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98 | 6bae7ed8 | bellard | int64_t free_space; |
99 | 6bae7ed8 | bellard | int ram_mb;
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100 | 6bae7ed8 | bellard | |
101 | 6bae7ed8 | bellard | free_space = (int64_t)stfs.f_bavail * stfs.f_bsize; |
102 | 6bae7ed8 | bellard | if ((ram_size + 8192 * 1024) >= free_space) { |
103 | 6bae7ed8 | bellard | ram_mb = (ram_size / (1024 * 1024)); |
104 | 5fafdf24 | ths | fprintf(stderr, |
105 | 6bae7ed8 | bellard | "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
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106 | 6bae7ed8 | bellard | tmpdir, ram_mb); |
107 | 6bae7ed8 | bellard | if (strcmp(tmpdir, "/dev/shm") == 0) { |
108 | 6bae7ed8 | bellard | fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
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109 | 2520c665 | aurel32 | "mount -o remount,size=%dm /dev/shm\n",
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110 | 6bae7ed8 | bellard | ram_mb + 16);
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111 | 6bae7ed8 | bellard | } else {
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112 | 5fafdf24 | ths | fprintf(stderr, |
113 | 6bae7ed8 | bellard | "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
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114 | 6bae7ed8 | bellard | "QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
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115 | 6bae7ed8 | bellard | "temporary RAM file will be opened.\n");
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116 | 6bae7ed8 | bellard | } |
117 | 6cb7ee85 | pbrook | fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
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118 | 6bae7ed8 | bellard | exit(1);
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119 | 6bae7ed8 | bellard | } |
120 | 6bae7ed8 | bellard | } |
121 | 5fafdf24 | ths | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
122 | 49b470eb | bellard | tmpdir); |
123 | 243a273e | bellard | phys_ram_fd = mkstemp(phys_ram_file); |
124 | 243a273e | bellard | if (phys_ram_fd < 0) { |
125 | 5fafdf24 | ths | fprintf(stderr, |
126 | 49b470eb | bellard | "warning: could not create temporary file in '%s'.\n"
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127 | 49b470eb | bellard | "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
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128 | 49b470eb | bellard | "Using '/tmp' as fallback.\n",
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129 | 49b470eb | bellard | tmpdir); |
130 | 5fafdf24 | ths | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
131 | 49b470eb | bellard | "/tmp");
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132 | 243a273e | bellard | phys_ram_fd = mkstemp(phys_ram_file); |
133 | 243a273e | bellard | if (phys_ram_fd < 0) { |
134 | 5fafdf24 | ths | fprintf(stderr, "Could not create temporary memory file '%s'\n",
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135 | 49b470eb | bellard | phys_ram_file); |
136 | 49b470eb | bellard | exit(1);
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137 | 49b470eb | bellard | } |
138 | 49b470eb | bellard | } |
139 | 49b470eb | bellard | unlink(phys_ram_file); |
140 | 49b470eb | bellard | } |
141 | 49b470eb | bellard | size = (size + 4095) & ~4095; |
142 | 49b470eb | bellard | ftruncate(phys_ram_fd, phys_ram_size + size); |
143 | 5fafdf24 | ths | ptr = mmap(NULL,
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144 | 5fafdf24 | ths | size, |
145 | 5fafdf24 | ths | PROT_WRITE | PROT_READ, MAP_SHARED, |
146 | 49b470eb | bellard | phys_ram_fd, phys_ram_size); |
147 | 49b470eb | bellard | if (ptr == MAP_FAILED) {
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148 | 49b470eb | bellard | fprintf(stderr, "Could not map physical memory\n");
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149 | 49b470eb | bellard | exit(1);
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150 | 49b470eb | bellard | } |
151 | 49b470eb | bellard | phys_ram_size += size; |
152 | 49b470eb | bellard | return ptr;
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153 | 49b470eb | bellard | } |
154 | 49b470eb | bellard | |
155 | 9596ebb7 | pbrook | static void kqemu_vfree(void *ptr) |
156 | 49b470eb | bellard | { |
157 | 49b470eb | bellard | /* may be useful some day, but currently we do not need to free */
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158 | 49b470eb | bellard | } |
159 | 49b470eb | bellard | |
160 | 6cb7ee85 | pbrook | #endif
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161 | 49b470eb | bellard | |
162 | 33f00271 | balrog | void *qemu_memalign(size_t alignment, size_t size)
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163 | 33f00271 | balrog | { |
164 | 33f00271 | balrog | #if defined(_POSIX_C_SOURCE)
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165 | 33f00271 | balrog | int ret;
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166 | 33f00271 | balrog | void *ptr;
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167 | 33f00271 | balrog | ret = posix_memalign(&ptr, alignment, size); |
168 | 33f00271 | balrog | if (ret != 0) |
169 | 33f00271 | balrog | return NULL; |
170 | 33f00271 | balrog | return ptr;
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171 | 33f00271 | balrog | #elif defined(_BSD)
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172 | 33f00271 | balrog | return valloc(size);
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173 | 33f00271 | balrog | #else
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174 | 33f00271 | balrog | return memalign(alignment, size);
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175 | 33f00271 | balrog | #endif
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176 | 33f00271 | balrog | } |
177 | 33f00271 | balrog | |
178 | 49b470eb | bellard | /* alloc shared memory pages */
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179 | 49b470eb | bellard | void *qemu_vmalloc(size_t size)
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180 | 49b470eb | bellard | { |
181 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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182 | 6cb7ee85 | pbrook | if (kqemu_allowed)
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183 | 6cb7ee85 | pbrook | return kqemu_vmalloc(size);
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184 | 6cb7ee85 | pbrook | #endif
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185 | 49b470eb | bellard | #ifdef _BSD
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186 | 49b470eb | bellard | return valloc(size);
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187 | 49b470eb | bellard | #else
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188 | 49b470eb | bellard | return memalign(4096, size); |
189 | 49b470eb | bellard | #endif
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190 | 49b470eb | bellard | } |
191 | 49b470eb | bellard | |
192 | 49b470eb | bellard | void qemu_vfree(void *ptr) |
193 | 49b470eb | bellard | { |
194 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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195 | 6cb7ee85 | pbrook | if (kqemu_allowed)
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196 | 6cb7ee85 | pbrook | kqemu_vfree(ptr); |
197 | 6cb7ee85 | pbrook | #endif
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198 | 49b470eb | bellard | free(ptr); |
199 | 49b470eb | bellard | } |
200 | 49b470eb | bellard | |
201 | 49b470eb | bellard | #endif
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202 | 49b470eb | bellard | |
203 | aa26bb2d | ths | int qemu_create_pidfile(const char *filename) |
204 | aa26bb2d | ths | { |
205 | aa26bb2d | ths | char buffer[128]; |
206 | aa26bb2d | ths | int len;
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207 | aa26bb2d | ths | #ifndef _WIN32
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208 | aa26bb2d | ths | int fd;
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209 | aa26bb2d | ths | |
210 | aa26bb2d | ths | fd = open(filename, O_RDWR | O_CREAT, 0600);
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211 | aa26bb2d | ths | if (fd == -1) |
212 | aa26bb2d | ths | return -1; |
213 | aa26bb2d | ths | |
214 | aa26bb2d | ths | if (lockf(fd, F_TLOCK, 0) == -1) |
215 | aa26bb2d | ths | return -1; |
216 | aa26bb2d | ths | |
217 | aa26bb2d | ths | len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid()); |
218 | aa26bb2d | ths | if (write(fd, buffer, len) != len)
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219 | aa26bb2d | ths | return -1; |
220 | aa26bb2d | ths | #else
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221 | aa26bb2d | ths | HANDLE file; |
222 | aa26bb2d | ths | DWORD flags; |
223 | aa26bb2d | ths | OVERLAPPED overlap; |
224 | aa26bb2d | ths | BOOL ret; |
225 | aa26bb2d | ths | |
226 | aa26bb2d | ths | /* Open for writing with no sharing. */
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227 | 5fafdf24 | ths | file = CreateFile(filename, GENERIC_WRITE, 0, NULL, |
228 | aa26bb2d | ths | OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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229 | aa26bb2d | ths | |
230 | aa26bb2d | ths | if (file == INVALID_HANDLE_VALUE)
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231 | aa26bb2d | ths | return -1; |
232 | aa26bb2d | ths | |
233 | aa26bb2d | ths | flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY; |
234 | aa26bb2d | ths | overlap.hEvent = 0;
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235 | aa26bb2d | ths | /* Lock 1 byte. */
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236 | aa26bb2d | ths | ret = LockFileEx(file, flags, 0, 0, 1, &overlap); |
237 | aa26bb2d | ths | if (ret == 0) |
238 | aa26bb2d | ths | return -1; |
239 | aa26bb2d | ths | |
240 | aa26bb2d | ths | /* Write PID to file. */
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241 | aa26bb2d | ths | len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid()); |
242 | 5fafdf24 | ths | ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len, |
243 | aa26bb2d | ths | &overlap, NULL);
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244 | aa26bb2d | ths | if (ret == 0) |
245 | aa26bb2d | ths | return -1; |
246 | aa26bb2d | ths | #endif
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247 | aa26bb2d | ths | return 0; |
248 | aa26bb2d | ths | } |
249 | 29b3a662 | pbrook | |
250 | 29b3a662 | pbrook | #ifdef _WIN32
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251 | 29b3a662 | pbrook | |
252 | 29b3a662 | pbrook | /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
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253 | 29b3a662 | pbrook | #define _W32_FT_OFFSET (116444736000000000ULL) |
254 | 29b3a662 | pbrook | |
255 | 29b3a662 | pbrook | int qemu_gettimeofday(qemu_timeval *tp)
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256 | 29b3a662 | pbrook | { |
257 | 29b3a662 | pbrook | union {
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258 | 29b3a662 | pbrook | unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */ |
259 | 29b3a662 | pbrook | FILETIME ft; |
260 | 29b3a662 | pbrook | } _now; |
261 | 29b3a662 | pbrook | |
262 | 29b3a662 | pbrook | if(tp)
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263 | 29b3a662 | pbrook | { |
264 | 29b3a662 | pbrook | GetSystemTimeAsFileTime (&_now.ft); |
265 | 29b3a662 | pbrook | tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL ); |
266 | 29b3a662 | pbrook | tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL); |
267 | 29b3a662 | pbrook | } |
268 | 29b3a662 | pbrook | /* Always return 0 as per Open Group Base Specifications Issue 6.
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269 | 29b3a662 | pbrook | Do not set errno on error. */
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270 | 29b3a662 | pbrook | return 0; |
271 | 29b3a662 | pbrook | } |
272 | 29b3a662 | pbrook | #endif /* _WIN32 */ |