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Added some virtual files (if missing) to allow wine to compute caches…
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…ize and coherency (backported from box64)
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@ptitSeb
ptitSeb committed May 19, 2024
1 parent 148722d commit 13c7029
Showing 1 changed file with 165 additions and 2 deletions.
167 changes: 165 additions & 2 deletions src/wrapped/wrappedlibc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1661,6 +1661,19 @@ static int isProcSelf(const char *path, const char* w)
return 0;
}

static int isSysCpuCache(const char *path, const char* w, int* _cpu, int* _index)
{
char tmp[128];
int cpu, index;
if(sscanf(path, "/sys/devices/system/cpu/cpu%d/cache/index%d/%s", &cpu, &index, tmp)!=3)
return 0;
if(strcmp(tmp, w))
return 0;
if(_cpu) * _cpu = cpu;
if(_index) *_index = index;
return 1;
}

EXPORT int32_t my_readlink(x86emu_t* emu, void* path, void* buf, uint32_t sz)
{
if(isProcSelf((const char*)path, "exe")) {
Expand Down Expand Up @@ -1761,7 +1774,42 @@ void CreateCPUPresentFile(int fd)
dummy = write(fd, buff, strlen(buff));
(void)dummy;
}

void CreateClocksourceFile(int fd)
{
size_t dummy;
dummy = write(fd, "tsc\n", strlen("tsc\n"));
(void)dummy;
}
void CreateCpuCacheAssoc(int fd, int cpu, int index)
{
size_t dummy;
char tmp[64];
sprintf(tmp, "%d\n", (index>=3)?16:8); // Random be coherent values...
dummy = write(fd, tmp, strlen(tmp));
(void)dummy;
}
void CreateCpuCacheCoher(int fd, int cpu, int index)
{
size_t dummy;
char tmp[64];
sprintf(tmp, "%d\n", 64); // Random be coherent values...
dummy = write(fd, tmp, strlen(tmp));
(void)dummy;
}
void CreateCpuCacheSize(int fd, int cpu, int index)
{
size_t dummy;
char tmp[64];
int cachesize = 12288;
switch(index) {
case 0: cachesize = 32; break;
case 1: cachesize = 32; break;
case 2: cachesize = 256; break;
}
sprintf(tmp, "%dK\n", cachesize); // Random be coherent values...
dummy = write(fd, tmp, strlen(tmp));
(void)dummy;
}

#ifdef ANDROID
static int shm_open(const char *name, int oflag, mode_t mode) {
Expand All @@ -1777,7 +1825,10 @@ static int shm_unlink(const char *name) {
#endif
#define TMP_MEMMAP "box86_tmpmemmap"
#define TMP_CMDLINE "box86_tmpcmdline"
#define TMP_CPUPRESENT "box64_cpupresent"
#define TMP_CPUPRESENT "box86_cpupresent"
#define TMP_CPUCACHE_ASSOC "box86_cpucacheassoc"
#define TMP_CPUCACHE_COHER "box86_cpucachecoher"
#define TMP_CPUCACHE_SIZE "box86_cpucachesize"
EXPORT int32_t my_open(x86emu_t* emu, void* pathname, int32_t flags, uint32_t mode)
{
if(isProcSelf((const char*) pathname, "cmdline")) {
Expand Down Expand Up @@ -1830,6 +1881,34 @@ EXPORT int32_t my_open(x86emu_t* emu, void* pathname, int32_t flags, uint32_t mo
lseek(tmp, 0, SEEK_SET);
return tmp;
}
int cpu, index;
if(isSysCpuCache(pathname, "ways_of_associativity", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_ASSOC, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_ASSOC); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
if(isSysCpuCache(pathname, "coherency_line_size", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_COHER, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_COHER); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheCoher(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
if(isSysCpuCache(pathname, "size", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_SIZE, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_SIZE); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
#endif
int ret = open(pathname, flags, mode);
return ret;
Expand Down Expand Up @@ -1919,6 +1998,34 @@ EXPORT int32_t my_open64(x86emu_t* emu, void* pathname, int32_t flags, uint32_t
lseek(tmp, 0, SEEK_SET);
return tmp;
}
int cpu, index;
if(isSysCpuCache(pathname, "ways_of_associativity", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_ASSOC, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_ASSOC); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
if(isSysCpuCache(pathname, "coherency_line_size", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_COHER, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_COHER); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheCoher(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
if(isSysCpuCache(pathname, "size", &cpu, &index) && !FileExist(pathname, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_SIZE, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return open(pathname, flags, mode); // error fallback
shm_unlink(TMP_CPUCACHE_SIZE); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return tmp;
}
#endif
return open64(pathname, flags, mode);
}
Expand Down Expand Up @@ -1964,6 +2071,34 @@ EXPORT FILE* my_fopen(x86emu_t* emu, const char* path, const char* mode)
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
int cpu, index;
if(isSysCpuCache(path, "ways_of_associativity", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_ASSOC, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_ASSOC); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
if(isSysCpuCache(path, "coherency_line_size", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_COHER, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_COHER); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheCoher(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
if(isSysCpuCache(path, "size", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_SIZE, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_SIZE); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
#endif
if(isProcSelf(path, "exe")) {
return fopen(emu->context->fullpath, mode);
Expand Down Expand Up @@ -2012,6 +2147,34 @@ EXPORT FILE* my_fopen64(x86emu_t* emu, const char* path, const char* mode)
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
int cpu, index;
if(isSysCpuCache(path, "ways_of_associativity", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_ASSOC, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_ASSOC); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
if(isSysCpuCache(path, "coherency_line_size", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_COHER, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_COHER); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheCoher(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
if(isSysCpuCache(path, "size", &cpu, &index) && !FileExist(path, IS_FILE)) {
// Create a dummy one
int tmp = shm_open(TMP_CPUCACHE_SIZE, O_RDWR | O_CREAT, S_IRWXU);
if(tmp<0) return fopen64(path, mode); // error fallback
shm_unlink(TMP_CPUCACHE_SIZE); // remove the shm file, but it will still exist because it's currently in use
CreateCpuCacheAssoc(tmp, cpu, index);
lseek(tmp, 0, SEEK_SET);
return fdopen(tmp, mode);
}
#endif
if(isProcSelf(path, "exe")) {
return fopen64(emu->context->fullpath, mode);
Expand Down

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