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egl/main: drop support for external egl drivers

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The only user (egl_gallium) is not longer around.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Chad Versace <chad.versace@intel.com>
This commit is contained in:
Emil Velikov
2015-05-11 23:43:44 +01:00
parent 4925c35660
commit 209360bbb9
1 changed files with 13 additions and 351 deletions
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364
src/egl/main/egldriver.c
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@@ -45,21 +45,13 @@
#include "egldriver.h"
#include "egllog.h"
#if defined(_EGL_OS_UNIX)
#include <dlfcn.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#endif
#ifdef _EGL_BUILT_IN_DRIVER_HAIKU
_EGLDriver* _eglBuiltInDriverHaiku(const char* args);
#endif
typedef struct _egl_module {
char *Path;
char *Name;
_EGLMain_t BuiltIn;
void *Handle;
_EGLDriver *Driver;
} _EGLModule;
@@ -79,153 +71,24 @@ const struct {
{ NULL, NULL }
};
/**
* Wrappers for dlopen/dlclose()
*/
#if defined(_EGL_OS_WINDOWS)
typedef HMODULE lib_handle;
static HMODULE
open_library(const char *filename)
{
return LoadLibrary(filename);
}
static void
close_library(HMODULE lib)
{
FreeLibrary(lib);
}
static const char *
library_suffix(void)
{
return ".dll";
}
#elif defined(_EGL_OS_UNIX)
typedef void * lib_handle;
static void *
open_library(const char *filename)
{
return dlopen(filename, RTLD_LAZY);
}
static void
close_library(void *lib)
{
dlclose(lib);
}
static const char *
library_suffix(void)
{
return ".so";
}
#endif
/**
* Open the named driver and find its bootstrap function: _eglMain().
*/
static _EGLMain_t
_eglOpenLibrary(const char *driverPath, lib_handle *handle)
{
lib_handle lib;
_EGLMain_t mainFunc = NULL;
const char *error = "unknown error";
assert(driverPath);
_eglLog(_EGL_DEBUG, "dlopen(%s)", driverPath);
lib = open_library(driverPath);
#if defined(_EGL_OS_WINDOWS)
/* XXX untested */
if (lib)
mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
#elif defined(_EGL_OS_UNIX)
if (lib) {
union {
_EGLMain_t func;
void *ptr;
} tmp = { NULL };
/* direct cast gives a warning when compiled with -pedantic */
tmp.ptr = dlsym(lib, "_eglMain");
mainFunc = tmp.func;
if (!mainFunc)
error = dlerror();
}
else {
error = dlerror();
}
#endif
if (!lib) {
_eglLog(_EGL_WARNING, "Could not open driver %s (%s)",
driverPath, error);
return NULL;
}
if (!mainFunc) {
_eglLog(_EGL_WARNING, "_eglMain not found in %s (%s)",
driverPath, error);
if (lib)
close_library(lib);
return NULL;
}
*handle = lib;
return mainFunc;
}
/**
* Load a module and create the driver object.
*/
static EGLBoolean
_eglLoadModule(_EGLModule *mod)
{
_EGLMain_t mainFunc;
lib_handle lib;
_EGLDriver *drv;
if (mod->Driver)
return EGL_TRUE;
if (mod->BuiltIn) {
lib = (lib_handle) NULL;
mainFunc = mod->BuiltIn;
}
else {
mainFunc = _eglOpenLibrary(mod->Path, &lib);
if (!mainFunc)
if (!mod->BuiltIn)
return EGL_FALSE;
}
drv = mainFunc(NULL);
if (!drv) {
if (lib)
close_library(lib);
drv = mod->BuiltIn(NULL);
if (!drv || !drv->Name)
return EGL_FALSE;
}
if (!drv->Name) {
_eglLog(_EGL_WARNING, "Driver loaded from %s has no name", mod->Path);
drv->Name = "UNNAMED";
}
mod->Handle = (void *) lib;
mod->Driver = drv;
return EGL_TRUE;
@@ -243,20 +106,11 @@ _eglUnloadModule(_EGLModule *mod)
if (mod->Driver && mod->Driver->Unload)
mod->Driver->Unload(mod->Driver);
/*
* XXX At this point (atexit), the module might be the last reference to
* libEGL. Closing the module might unmap libEGL and give problems.
*/
#if 0
if (mod->Handle)
close_library(mod->Handle);
#endif
#elif defined(_EGL_OS_WINDOWS)
/* XXX Windows unloads DLLs before atexit */
#endif
mod->Driver = NULL;
mod->Handle = NULL;
}
@@ -264,7 +118,7 @@ _eglUnloadModule(_EGLModule *mod)
* Add a module to the module array.
*/
static _EGLModule *
_eglAddModule(const char *path)
_eglAddModule(const char *name)
{
_EGLModule *mod;
EGLint i;
@@ -278,22 +132,22 @@ _eglAddModule(const char *path)
/* find duplicates */
for (i = 0; i < _eglModules->Size; i++) {
mod = _eglModules->Elements[i];
if (strcmp(mod->Path, path) == 0)
if (strcmp(mod->Name, name) == 0)
return mod;
}
/* allocate a new one */
mod = calloc(1, sizeof(*mod));
if (mod) {
mod->Path = _eglstrdup(path);
if (!mod->Path) {
mod->Name = _eglstrdup(name);
if (!mod->Name) {
free(mod);
mod = NULL;
}
}
if (mod) {
_eglAppendArray(_eglModules, (void *) mod);
_eglLog(_EGL_DEBUG, "added %s to module array", mod->Path);
_eglLog(_EGL_DEBUG, "added %s to module array", mod->Name);
}
return mod;
@@ -309,154 +163,11 @@ _eglFreeModule(void *module)
_EGLModule *mod = (_EGLModule *) module;
_eglUnloadModule(mod);
free(mod->Path);
free(mod->Name);
free(mod);
}
/**
* A loader function for use with _eglPreloadForEach. The loader data is the
* filename of the driver. This function stops on the first valid driver.
*/
static EGLBoolean
_eglLoaderFile(const char *dir, size_t len, void *loader_data)
{
char path[1024];
const char *filename = (const char *) loader_data;
size_t flen = strlen(filename);
/* make a full path */
if (len + flen + 2 > sizeof(path))
return EGL_TRUE;
if (len) {
memcpy(path, dir, len);
path[len++] = '/';
}
memcpy(path + len, filename, flen);
len += flen;
path[len] = '\0';
if (library_suffix()) {
const char *suffix = library_suffix();
size_t slen = strlen(suffix);
const char *p;
EGLBoolean need_suffix;
p = filename + flen - slen;
need_suffix = (p < filename || strcmp(p, suffix) != 0);
if (need_suffix) {
/* overflow */
if (len + slen + 1 > sizeof(path))
return EGL_TRUE;
strcpy(path + len, suffix);
}
}
#if defined(_EGL_OS_UNIX)
/* check if the file exists */
if (access(path, F_OK))
return EGL_TRUE;
#endif
_eglAddModule(path);
return EGL_TRUE;
}
/**
* Run the callback function on each driver directory.
*
* The process may end prematurely if the callback function returns false.
*/
static void
_eglPreloadForEach(const char *search_path,
EGLBoolean (*loader)(const char *, size_t, void *),
void *loader_data)
{
const char *cur, *next;
size_t len;
cur = search_path;
while (cur) {
next = strchr(cur, ':');
len = (next) ? next - cur : strlen(cur);
if (!loader(cur, len, loader_data))
break;
cur = (next) ? next + 1 : NULL;
}
}
/**
* Return a list of colon-separated driver directories.
*/
static const char *
_eglGetSearchPath(void)
{
static char search_path[1024];
#if defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS)
if (search_path[0] == '\0') {
char *buf = search_path;
size_t len = sizeof(search_path);
EGLBoolean use_env;
char dir_sep;
int ret;
#if defined(_EGL_OS_UNIX)
use_env = (geteuid() == getuid() && getegid() == getgid());
dir_sep = '/';
#else
use_env = EGL_TRUE;
dir_sep = '\\';
#endif
if (use_env) {
char *p;
/* extract the dirname from EGL_DRIVER */
p = getenv("EGL_DRIVER");
if (p && strchr(p, dir_sep)) {
ret = _eglsnprintf(buf, len, "%s", p);
if (ret > 0 && ret < len) {
p = strrchr(buf, dir_sep);
*p++ = ':';
len -= p - buf;
buf = p;
}
}
/* append EGL_DRIVERS_PATH */
p = getenv("EGL_DRIVERS_PATH");
if (p) {
ret = _eglsnprintf(buf, len, "%s:", p);
if (ret > 0 && ret < len) {
buf += ret;
len -= ret;
}
}
}
else {
_eglLog(_EGL_DEBUG,
"ignore EGL_DRIVERS_PATH for setuid/setgid binaries");
}
ret = _eglsnprintf(buf, len, "%s", _EGL_DRIVER_SEARCH_DIR);
if (ret < 0 || ret >= len)
search_path[0] = '\0';
_eglLog(_EGL_DEBUG, "EGL search path is %s", search_path);
}
#endif /* defined(_EGL_OS_UNIX) || defined(_EGL_OS_WINDOWS) */
return search_path;
}
/**
* Add the user driver to the module array.
*
@@ -465,42 +176,15 @@ _eglGetSearchPath(void)
static EGLBoolean
_eglAddUserDriver(void)
{
const char *search_path = _eglGetSearchPath();
char *env;
size_t name_len = 0;
env = getenv("EGL_DRIVER");
#if defined(_EGL_OS_UNIX)
if (env && strchr(env, '/')) {
search_path = "";
if ((geteuid() != getuid() || getegid() != getgid())) {
_eglLog(_EGL_DEBUG,
"ignore EGL_DRIVER for setuid/setgid binaries");
env = NULL;
}
}
else if (env) {
char *suffix = strchr(env, '.');
name_len = (suffix) ? suffix - env : strlen(env);
}
#else
if (env)
name_len = strlen(env);
#endif /* _EGL_OS_UNIX */
/*
* Try built-in drivers first if we know the driver name. This makes sure
* we do not load the outdated external driver that is still on the
* filesystem.
*/
if (name_len) {
_EGLModule *mod;
if (env) {
EGLint i;
for (i = 0; _eglBuiltInDrivers[i].name; i++) {
if (strlen(_eglBuiltInDrivers[i].name) == name_len &&
!strncmp(_eglBuiltInDrivers[i].name, env, name_len)) {
mod = _eglAddModule(env);
if (!strcmp(_eglBuiltInDrivers[i].name, env)) {
_EGLModule *mod = _eglAddModule(env);
if (mod)
mod->BuiltIn = _eglBuiltInDrivers[i].main;
@@ -509,13 +193,6 @@ _eglAddUserDriver(void)
}
}
/* otherwise, treat env as a path */
if (env) {
_eglPreloadForEach(search_path, _eglLoaderFile, (void *) env);
return EGL_TRUE;
}
return EGL_FALSE;
}
@@ -683,18 +360,3 @@ _eglUnloadDrivers(void)
_eglModules = NULL;
}
}
/**
* Invoke a callback function on each EGL search path.
*
* The first argument of the callback function is the name of the search path.
* The second argument is the length of the name.
*/
void
_eglSearchPathForEach(EGLBoolean (*callback)(const char *, size_t, void *),
void *callback_data)
{
const char *search_path = _eglGetSearchPath();
_eglPreloadForEach(search_path, callback, callback_data);
}