132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
#include <dbg.h>
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#include <elf.h>
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#include <initrd.h>
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#include <memory.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <tasking.h>
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#include <rpc.h>
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#include <serdes.h>
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#include <spawn.h>
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typedef struct {
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char filename[100];
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char mode[8];
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char uid[8];
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char gid[8];
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char size[12];
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char mtime[12];
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char chksum[8];
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char typeflag[1];
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} tar_header;
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size_t getsize(const char *in) {
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size_t size=0;
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size_t j;
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size_t count=1;
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for (j=11;j>0;j--,count*=8) {
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size+=((in[j-1]-'0')*count);
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}
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return size;
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}
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size_t find_loc(char* name,char* initrd) {
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size_t pos=0;
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tar_header tar_hdr;
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for (int i=0;;i++) {
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char* tar_hdr_ptr=(char*)&tar_hdr;
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for (size_t i=0;i<sizeof(tar_hdr);i++) {
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tar_hdr_ptr[i]=initrd[pos+i];
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}
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if (tar_hdr.filename[0]=='\0') break;
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size_t size=getsize(tar_hdr.size);
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pos+=512;
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if (strcmp(tar_hdr.filename,name)==0) {
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return pos;
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break;
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}
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pos+=size;
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if (pos%512!=0) {
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pos+=512-(pos%512);
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}
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}
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return 0;
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}
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char load_proc(size_t datapos,char* initrd) {
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int pos=0;
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elf_header header;
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pos=datapos;
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char* hdr_ptr=(char*)&header;
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for (size_t i=0;i<sizeof(elf_header);i++) {
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hdr_ptr[i]=initrd[pos];
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pos++;
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}
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if (header.magic!=ELF_MAGIC) {
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return 0;
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} else {
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void* address_space=new_address_space();
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for (int i=0;i<header.pheader_ent_nm;i++) {
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elf_pheader pheader;
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pos=(header.prog_hdr)+(header.pheader_ent_sz*i)+datapos;
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char* phdr_ptr=(char*)&pheader;
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for (size_t i=0;i<sizeof(elf_pheader);i++) {
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phdr_ptr[i]=initrd[pos];
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pos++;
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}
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char* ptr=alloc_memory(((pheader.memsz)/4096)+1);
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memset(ptr,0,pheader.memsz);
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if (pheader.filesz>0) {
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pos=pheader.offset+datapos;
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for (size_t i=0;i<pheader.filesz;i++) {
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ptr[i]=initrd[pos];
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pos++;
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}
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}
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copy_data(address_space,ptr,pheader.memsz,(void*)pheader.vaddr);
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}
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create_proc((void*)header.entry,address_space,NULL,NULL);
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}
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return 1;
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}
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int main() {
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serial_print("Init running\n");
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long size=initrd_sz();
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char* initrd=malloc(size);
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initrd_get(initrd);
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size_t datapos=find_loc("vfs",initrd);
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load_proc(datapos,initrd);
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while(rpc_is_init(2)==0);
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datapos=find_loc("devfs",initrd);
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load_proc(datapos,initrd);
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while(rpc_is_init(3)==0);
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int err=mount("","devfs","/dev");
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if (err) {
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serial_print("Failed to mount devfs\n");
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exit(1);
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}
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datapos=find_loc("initrd_drv",initrd);
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load_proc(datapos,initrd);
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while(rpc_is_init(4)==0);
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serial_print("Loading tar_fs\n");
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datapos=find_loc("tar_fs",initrd);
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load_proc(datapos,initrd);
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while(rpc_is_init(5)==0);
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serial_print("Mounting initrd\n");
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mount("/dev/initrd","tarfs","/initrd");
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serial_print("Loading VGA driver\n");
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posix_spawn(NULL,"/initrd/vga_drv",NULL,NULL,NULL,NULL);
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while(rpc_is_init(6)==0);
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stdout=fopen("/dev/vga","w");
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if (!stdout) {
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serial_print("Could not open the VGA file! \n");
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exit(1);
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}
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serial_print("Loading PCI driver\n");
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posix_spawn(NULL,"/initrd/pci",NULL,NULL,NULL,NULL);
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}
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