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#include "initrd.h"
#include "arch/x86_64/hal/obj.h"
#include "proc/init.h"
#include "jove.h"
#include "lib/printf.h"
#include "lib/tar.h"
#include "lib/string.h"
#include "hal/obj.h"
#include "hal/memory.h"
#include "sys/objdir.h"
extern uintptr_t _initrd_module;
PAGEALIGN jove_objdir_t s_initrd_objdir = { 0 };
#define CHECK_IF_INITRD(obj) \
if(obj_gettype(obj) != JOVE_OBJ_INITRD_FILE) { \
reterr(EBADOBJ); \
}
const char*
initrd_file_name(jove_owned_obj_t *obj)
{
CHECK_IF_INITRD(obj);
struct tar_header *file = obj_deref(obj);
return tar_filename(file);
}
size_t
initrd_file_size(jove_owned_obj_t *obj)
{
CHECK_IF_INITRD(obj);
struct tar_header *file = obj_deref(obj);
return tar_filesize(file);
}
void*
initrd_file_data(jove_owned_obj_t *obj)
{
CHECK_IF_INITRD(obj);
union tar_block *file = obj_deref(obj);
return &(file[1]);
}
jove_owned_obj_t*
initrd_seek(jove_owned_obj_t *objdir, const char *path)
{
if(obj_gettype(objdir) != JOVE_OBJ_OBJDIR) {
reterr(EBADOBJ);
}
for(size_t i = 0; i < JOVE_OBJDIR_ENTRIES; i++) {
jove_owned_obj_t *file_obj = objdir_getlocal(objdir, i);
if(obj_gettype(file_obj) != JOVE_OBJ_INITRD_FILE) {
goto loop_continue;
}
const char *filepath = initrd_file_name(file_obj);
if(filepath == NULL) {
goto loop_continue;
}
if(strncmp(path, filepath, strlen(filepath)+1) == 0) {
return file_obj;
}
loop_continue:
obj_release(file_obj);
}
return NULL;
}
void initrd_setup(void)
{
kprintf("Loading initrd from bootloader:\n");
{
jove_owned_obj_t *initrd_objdir_obj = objdir_getlocal(_rootdir_obj, INIT_ROOTDIR_INITRD_I);
obj_settype(initrd_objdir_obj, JOVE_OBJ_OBJDIR);
obj_setvalue(initrd_objdir_obj, (uintmax_t)&s_initrd_objdir);
size_t initrd_files = 0;
union tar_block *block = phys_tovirt(_initrd_module);
for(;;) {
struct tar_header *header = &block->header;
if(*header->filename == 0) break;
size_t file_size = tar_filesize(header);
kprintf("File: %s, Size: %i\n", tar_filename(header), file_size);
{
jove_owned_obj_t *initrd_file_obj = objdir_getlocal(initrd_objdir_obj, initrd_files++);
obj_settype(initrd_file_obj, JOVE_OBJ_INITRD_FILE);
obj_setvalue(initrd_file_obj, (uintmax_t)block);
obj_release(initrd_file_obj);
}
block = &block[((file_size + 511) / 512) + 1];
}
obj_release(initrd_objdir_obj);
}
}
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