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Handle NEEDED dep failures better in linker

This commit is contained in:
K. Lange 2018-09-24 12:20:47 +09:00
parent 7062734f9d
commit db1ada51c8
1 changed files with 16 additions and 6 deletions
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22
linker/linker.c
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@ -163,14 +163,12 @@ static elf_t * open_object(const char * path) {
/* If no path (eg. dlopen(NULL)), return the main object (the executable). */
if (!path) {
_main_obj->loaded = 1;
return _main_obj;
}
/* If we've already opened a file with this name, return it - don't load things twice. */
if (hashmap_has(objects_map, (void*)path)) {
elf_t * object = hashmap_get(objects_map, (void*)path);
object->loaded = 1;
return object;
}
@ -592,18 +590,19 @@ static void * do_actual_load(const char * filename, elf_t * lib, int flags) {
node_t * item;
while ((item = list_pop(lib->dependencies))) {
elf_t * lib = open_object(item->value);
elf_t * _lib = open_object(item->value);
if (!lib) {
if (!_lib) {
/* Missing dependencies are fatal to this process, but
* not to the entire application. */
free((void *)load_addr);
last_error = "Failed to load a dependency.";
lib->loaded = 0;
return NULL;
}
if (!lib->loaded) {
do_actual_load(item->value, lib, 0);
if (!_lib->loaded) {
do_actual_load(item->value, _lib, 0);
TRACE_LD("Loaded %s at 0x%x", item->value, lib->base);
}
@ -637,6 +636,8 @@ static void * do_actual_load(const char * filename, elf_t * lib, int flags) {
lib->init();
}
lib->loaded = 1;
/* And return an object for the loaded library */
return (void *)lib;
}
@ -656,6 +657,11 @@ static void * dlopen_ld(const char * filename, int flags) {
}
void * ret = do_actual_load(filename, lib, flags);
if (!ret) {
/* Dependency load failure, remove us from hash */
hashmap_remove(objects_map, (void*)filename);
}
TRACE_LD("Loaded %s at 0x%x", filename, lib->base);
return ret;
}
@ -782,6 +788,8 @@ int main(int argc, char * argv[]) {
list_insert(init_libs, lib);
}
lib->loaded = 1;
nope:
free(item);
}
@ -835,6 +843,8 @@ nope:
main_obj->init();
}
main_obj->loaded = 1;
/* Move heap start (kind of like a weird sbrk) */
{
char * args[] = {(char*)end_addr};