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elf_loader.c
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elf_loader.c
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/*-----------------------------------------------------------------------------
*
* ELF executable loader
* (c) maisvendoo, 30.08.2013
*
*---------------------------------------------------------------------------*/
#include "elf_loader.h"
extern vfs_node_t* fs_root;
/*-----------------------------------------------------------------------------
*
*---------------------------------------------------------------------------*/
elf_sections_t* load_elf(char* name)
{
size_t sz = 0;
/* Allocate ELF file structure */
elf_sections_t* elf = (elf_sections_t*) kmalloc(sizeof(elf_sections_t));
/* Open ELF file */
FILE* file_elf = fopen(fs_root, name, "r");
/* Read ELF header */
elf->elf_header = (Elf32_Ehdr*) kmalloc(sizeof(Elf32_Ehdr));
sz = fread(file_elf, elf->elf_header, sizeof(Elf32_Ehdr));
/* Read program header */
Elf32_Half proc_entries = elf->elf_header->e_phnum;
elf->p_header = (Elf32_Phdr*) kmalloc(sizeof(Elf32_Phdr)*proc_entries);
fseek(file_elf, elf->elf_header->e_phoff);
sz = fread(file_elf, elf->p_header, sizeof(Elf32_Phdr)*proc_entries);
/* Read ELF sections */
Elf32_Half sec_entries = elf->elf_header->e_shnum;
elf->section = (Elf32_Shdr*) kmalloc(sizeof(Elf32_Shdr)*sec_entries);
fseek(file_elf, elf->elf_header->e_shoff);
sz = fread(file_elf, elf->section, sizeof(Elf32_Shdr)*sec_entries);
elf->file = file_elf;
return elf;
}