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1 | ea88812f | bellard | /*
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2 | ea88812f | bellard | * QEMU low level functions
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3 | ea88812f | bellard | *
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4 | ea88812f | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | ea88812f | bellard | *
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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 | 605686cd | ths | #ifdef HOST_SOLARIS
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31 | 605686cd | ths | #include <sys/types.h> |
32 | 605686cd | ths | #include <sys/statvfs.h> |
33 | 605686cd | ths | #endif
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34 | ea88812f | bellard | |
35 | ea88812f | bellard | #include "cpu.h" |
36 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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37 | 6cb7ee85 | pbrook | #include "vl.h" |
38 | 6cb7ee85 | pbrook | #endif
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39 | ea88812f | bellard | |
40 | 6e4255f6 | bellard | #ifdef _WIN32
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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 | ea88812f | bellard | void *get_mmap_addr(unsigned long size) |
49 | ea88812f | bellard | { |
50 | ea88812f | bellard | return NULL; |
51 | ea88812f | bellard | } |
52 | ea88812f | bellard | |
53 | ea88812f | bellard | void qemu_free(void *ptr) |
54 | ea88812f | bellard | { |
55 | ea88812f | bellard | free(ptr); |
56 | ea88812f | bellard | } |
57 | ea88812f | bellard | |
58 | ea88812f | bellard | void *qemu_malloc(size_t size)
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59 | ea88812f | bellard | { |
60 | ea88812f | bellard | return malloc(size);
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61 | ea88812f | bellard | } |
62 | ea88812f | bellard | |
63 | 6e4255f6 | bellard | #if defined(_WIN32)
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64 | 6e4255f6 | bellard | |
65 | 6e4255f6 | bellard | void *qemu_vmalloc(size_t size)
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66 | 6e4255f6 | bellard | { |
67 | 6e4255f6 | bellard | /* FIXME: this is not exactly optimal solution since VirtualAlloc
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68 | 6e4255f6 | bellard | has 64Kb granularity, but at least it guarantees us that the
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69 | 6e4255f6 | bellard | memory is page aligned. */
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70 | 6e4255f6 | bellard | return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); |
71 | 6e4255f6 | bellard | } |
72 | 6e4255f6 | bellard | |
73 | 6e4255f6 | bellard | void qemu_vfree(void *ptr) |
74 | 6e4255f6 | bellard | { |
75 | 6e4255f6 | bellard | VirtualFree(ptr, 0, MEM_RELEASE);
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76 | 6e4255f6 | bellard | } |
77 | 6e4255f6 | bellard | |
78 | 6cb7ee85 | pbrook | #else
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79 | 6cb7ee85 | pbrook | |
80 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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81 | 49b470eb | bellard | |
82 | 6bae7ed8 | bellard | #include <sys/vfs.h> |
83 | 49b470eb | bellard | #include <sys/mman.h> |
84 | 49b470eb | bellard | #include <fcntl.h> |
85 | 49b470eb | bellard | |
86 | 6cb7ee85 | pbrook | void *kqemu_vmalloc(size_t size)
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87 | 49b470eb | bellard | { |
88 | 49b470eb | bellard | static int phys_ram_fd = -1; |
89 | 49b470eb | bellard | static int phys_ram_size = 0; |
90 | 49b470eb | bellard | const char *tmpdir; |
91 | 49b470eb | bellard | char phys_ram_file[1024]; |
92 | 49b470eb | bellard | void *ptr;
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93 | 605686cd | ths | #ifdef HOST_SOLARIS
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94 | 605686cd | ths | struct statvfs stfs;
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95 | 605686cd | ths | #else
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96 | 6bae7ed8 | bellard | struct statfs stfs;
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97 | 605686cd | ths | #endif
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98 | 49b470eb | bellard | |
99 | 49b470eb | bellard | if (phys_ram_fd < 0) { |
100 | 49b470eb | bellard | tmpdir = getenv("QEMU_TMPDIR");
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101 | 49b470eb | bellard | if (!tmpdir)
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102 | 605686cd | ths | #ifdef HOST_SOLARIS
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103 | 605686cd | ths | tmpdir = "/tmp";
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104 | 605686cd | ths | if (statvfs(tmpdir, &stfs) == 0) { |
105 | 605686cd | ths | #else
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106 | 49b470eb | bellard | tmpdir = "/dev/shm";
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107 | 6bae7ed8 | bellard | if (statfs(tmpdir, &stfs) == 0) { |
108 | 605686cd | ths | #endif
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109 | 6bae7ed8 | bellard | int64_t free_space; |
110 | 6bae7ed8 | bellard | int ram_mb;
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111 | 6bae7ed8 | bellard | |
112 | 6bae7ed8 | bellard | extern int ram_size; |
113 | 6bae7ed8 | bellard | free_space = (int64_t)stfs.f_bavail * stfs.f_bsize; |
114 | 6bae7ed8 | bellard | if ((ram_size + 8192 * 1024) >= free_space) { |
115 | 6bae7ed8 | bellard | ram_mb = (ram_size / (1024 * 1024)); |
116 | 6bae7ed8 | bellard | fprintf(stderr, |
117 | 6bae7ed8 | bellard | "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
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118 | 6bae7ed8 | bellard | tmpdir, ram_mb); |
119 | 6bae7ed8 | bellard | if (strcmp(tmpdir, "/dev/shm") == 0) { |
120 | 6bae7ed8 | bellard | fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
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121 | 6bae7ed8 | bellard | "umount /dev/shm\n"
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122 | 6bae7ed8 | bellard | "mount -t tmpfs -o size=%dm none /dev/shm\n",
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123 | 6bae7ed8 | bellard | ram_mb + 16);
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124 | 6bae7ed8 | bellard | } else {
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125 | 6bae7ed8 | bellard | fprintf(stderr, |
126 | 6bae7ed8 | bellard | "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
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127 | 6bae7ed8 | bellard | "QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
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128 | 6bae7ed8 | bellard | "temporary RAM file will be opened.\n");
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129 | 6bae7ed8 | bellard | } |
130 | 6cb7ee85 | pbrook | fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
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131 | 6bae7ed8 | bellard | exit(1);
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132 | 6bae7ed8 | bellard | } |
133 | 6bae7ed8 | bellard | } |
134 | 49b470eb | bellard | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
135 | 49b470eb | bellard | tmpdir); |
136 | 243a273e | bellard | phys_ram_fd = mkstemp(phys_ram_file); |
137 | 243a273e | bellard | if (phys_ram_fd < 0) { |
138 | 49b470eb | bellard | fprintf(stderr, |
139 | 49b470eb | bellard | "warning: could not create temporary file in '%s'.\n"
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140 | 49b470eb | bellard | "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
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141 | 49b470eb | bellard | "Using '/tmp' as fallback.\n",
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142 | 49b470eb | bellard | tmpdir); |
143 | 49b470eb | bellard | snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", |
144 | 49b470eb | bellard | "/tmp");
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145 | 243a273e | bellard | phys_ram_fd = mkstemp(phys_ram_file); |
146 | 243a273e | bellard | if (phys_ram_fd < 0) { |
147 | 49b470eb | bellard | fprintf(stderr, "Could not create temporary memory file '%s'\n",
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148 | 49b470eb | bellard | phys_ram_file); |
149 | 49b470eb | bellard | exit(1);
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150 | 49b470eb | bellard | } |
151 | 49b470eb | bellard | } |
152 | 49b470eb | bellard | unlink(phys_ram_file); |
153 | 49b470eb | bellard | } |
154 | 49b470eb | bellard | size = (size + 4095) & ~4095; |
155 | 49b470eb | bellard | ftruncate(phys_ram_fd, phys_ram_size + size); |
156 | 49b470eb | bellard | ptr = mmap(NULL,
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157 | 49b470eb | bellard | size, |
158 | 49b470eb | bellard | PROT_WRITE | PROT_READ, MAP_SHARED, |
159 | 49b470eb | bellard | phys_ram_fd, phys_ram_size); |
160 | 49b470eb | bellard | if (ptr == MAP_FAILED) {
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161 | 49b470eb | bellard | fprintf(stderr, "Could not map physical memory\n");
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162 | 49b470eb | bellard | exit(1);
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163 | 49b470eb | bellard | } |
164 | 49b470eb | bellard | phys_ram_size += size; |
165 | 49b470eb | bellard | return ptr;
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166 | 49b470eb | bellard | } |
167 | 49b470eb | bellard | |
168 | 6cb7ee85 | pbrook | void kqemu_vfree(void *ptr) |
169 | 49b470eb | bellard | { |
170 | 49b470eb | bellard | /* may be useful some day, but currently we do not need to free */
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171 | 49b470eb | bellard | } |
172 | 49b470eb | bellard | |
173 | 6cb7ee85 | pbrook | #endif
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174 | 49b470eb | bellard | |
175 | 49b470eb | bellard | /* alloc shared memory pages */
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176 | 49b470eb | bellard | void *qemu_vmalloc(size_t size)
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177 | 49b470eb | bellard | { |
178 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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179 | 6cb7ee85 | pbrook | if (kqemu_allowed)
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180 | 6cb7ee85 | pbrook | return kqemu_vmalloc(size);
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181 | 6cb7ee85 | pbrook | #endif
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182 | 49b470eb | bellard | #ifdef _BSD
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183 | 49b470eb | bellard | return valloc(size);
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184 | 49b470eb | bellard | #else
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185 | 49b470eb | bellard | return memalign(4096, size); |
186 | 49b470eb | bellard | #endif
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187 | 49b470eb | bellard | } |
188 | 49b470eb | bellard | |
189 | 49b470eb | bellard | void qemu_vfree(void *ptr) |
190 | 49b470eb | bellard | { |
191 | 6cb7ee85 | pbrook | #if defined(USE_KQEMU)
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192 | 6cb7ee85 | pbrook | if (kqemu_allowed)
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193 | 6cb7ee85 | pbrook | kqemu_vfree(ptr); |
194 | 6cb7ee85 | pbrook | #endif
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195 | 49b470eb | bellard | free(ptr); |
196 | 49b470eb | bellard | } |
197 | 49b470eb | bellard | |
198 | 49b470eb | bellard | #endif
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199 | 49b470eb | bellard | |
200 | 07d89866 | bellard | void *qemu_mallocz(size_t size)
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201 | 07d89866 | bellard | { |
202 | 07d89866 | bellard | void *ptr;
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203 | 07d89866 | bellard | ptr = qemu_malloc(size); |
204 | 07d89866 | bellard | if (!ptr)
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205 | 07d89866 | bellard | return NULL; |
206 | 07d89866 | bellard | memset(ptr, 0, size);
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207 | 07d89866 | bellard | return ptr;
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208 | 07d89866 | bellard | } |
209 | 07d89866 | bellard | |
210 | 2571929a | bellard | char *qemu_strdup(const char *str) |
211 | 2571929a | bellard | { |
212 | 2571929a | bellard | char *ptr;
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213 | 2571929a | bellard | ptr = qemu_malloc(strlen(str) + 1);
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214 | 2571929a | bellard | if (!ptr)
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215 | 2571929a | bellard | return NULL; |
216 | 2571929a | bellard | strcpy(ptr, str); |
217 | 2571929a | bellard | return ptr;
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218 | 2571929a | bellard | } |