diff options
Diffstat (limited to 'pk/elf.c')
-rw-r--r-- | pk/elf.c | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/pk/elf.c b/pk/elf.c deleted file mode 100644 index ca44645..0000000 --- a/pk/elf.c +++ /dev/null @@ -1,71 +0,0 @@ -#include <sys/stat.h> -#include <fcntl.h> -#include <elf.h> -#include <string.h> -#include "file.h" -#include "pk.h" - -long load_elf(const char* fn, int* user64) -{ - sysret_t ret = file_open(fn, strlen(fn)+1, O_RDONLY, 0); - file_t* file = (file_t*)ret.result; - if(ret.result == -1) - goto fail; - - char buf[2048]; // XXX - int header_size = file_read(file, buf, sizeof(buf)).result; - const Elf64_Ehdr* eh64 = (const Elf64_Ehdr*)buf; - if(header_size < (int)sizeof(Elf64_Ehdr) || - !(eh64->e_ident[0] == '\177' && eh64->e_ident[1] == 'E' && - eh64->e_ident[2] == 'L' && eh64->e_ident[3] == 'F')) - goto fail; - - #define LOAD_ELF do { \ - eh = (typeof(eh))buf; \ - kassert(header_size >= eh->e_phoff + eh->e_phnum*sizeof(*ph)); \ - ph = (typeof(ph))(buf+eh->e_phoff); \ - for(int i = 0; i < eh->e_phnum; i++, ph++) { \ - if(ph->p_type == SHT_PROGBITS && ph->p_memsz) { \ - extern char _end; \ - if((char*)(long)ph->p_vaddr < &_end) \ - { \ - long diff = &_end - (char*)(long)ph->p_vaddr; \ - ph->p_vaddr += diff; \ - ph->p_offset += diff; \ - ph->p_memsz = diff >= ph->p_memsz ? 0 : ph->p_memsz - diff; \ - ph->p_filesz = diff >= ph->p_filesz ? 0 : ph->p_filesz - diff; \ - } \ - if(file_pread(file, (char*)(long)ph->p_vaddr, ph->p_filesz, ph->p_offset).result != ph->p_filesz) \ - goto fail; \ - memset((char*)(long)ph->p_vaddr+ph->p_filesz, 0, ph->p_memsz-ph->p_filesz); \ - } \ - } \ - } while(0) - - long entry; - if(eh64->e_ident[EI_CLASS] == ELFCLASS32) - { - Elf32_Ehdr* eh; - Elf32_Phdr* ph; - LOAD_ELF; - entry = eh->e_entry; - } - else if(eh64->e_ident[EI_CLASS] == ELFCLASS64) - { - Elf64_Ehdr* eh; - Elf64_Phdr* ph; - LOAD_ELF; - entry = eh->e_entry; - } - else - goto fail; - - *user64 = eh64->e_ident[EI_CLASS] == ELFCLASS64; - - file_decref(file); - - return entry; - -fail: - panic("couldn't open ELF program: %s!", fn); -} |