binfmt.h File Reference

#include <core/system.h>
#include <fs/vfs.h>
#include <sys/proc.h>

Go to the source code of this file.

Data Structures
struct	binfmt
	A format of executable files: says whether a file is one, and loads it into a process (sys/binfmt/). More...

Functions
int	binfmt_load (struct proc *proc, const char *path, struct proc **ref)
	Loads a program into a process, for execve().
int	binfmt_elf_check (struct vnode *vnode)
	Says whether a file is an ELF program this kernel can run: its magic number, class and machine.
int	binfmt_elf_load (struct proc *proc, const char *path, struct vnode *vnode)
	Loads an ELF program into a process.

Function Documentation

binfmt_elf_check()

int binfmt_elf_check

(

struct vnode *

vnode

)

Says whether a file is an ELF program this kernel can run: its magic number, class and machine.

It is checked before the process's old program is destroyed.

Parameters

vnode

the file

Returns

0 if it is, or -ENOEXEC

Definition at line 199 of file elf.c.

References binfmt_elf_check(), elf32_hdr::e_ident, elf32_hdr::e_machine, EI_CLASS, EI_MAG0, EI_MAG1, EI_MAG2, EI_MAG3, ELF_CLASS, ELF_MACHINE, ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3, and vfs_read().

Referenced by binfmt_elf_check().

binfmt_elf_load()

int binfmt_elf_load	(	struct proc *	proc,
		const char *	path,
		struct vnode *	vnode )

Loads an ELF program into a process.

Parameters

proc	the process, whose address space is empty
path	not used
vnode	the program's file

Returns

0, -EINVAL or -ENOMEM

Definition at line 227 of file elf.c.

References binfmt_elf_load(), and binfmt_elf_load_segments().

Referenced by binfmt_elf_load().

binfmt_load()

int binfmt_load	(	struct proc *	proc,
		const char *	path,
		struct proc **	ref )

Loads a program into a process, for execve().

The file must be a regular file that the process may execute, in a format the kernel knows.

Parameters

proc	the process, whose memory the program replaces
path	the program's path
ref	not used

Returns

0, or a negative errno: -ENOENT, -EACCES, -ENOEXEC (no format knows the file) or the loader's

Definition at line 124 of file binfmt.c.

References binfmt_fmt_load(), binfmt_list, binfmt_load(), memset(), vnode::mode, NR_BINFMT, NULL, PROC_UIO, vfs_access(), vfs_close(), vfs_lookup(), and VFS_X.

Referenced by binfmt_load(), kmain(), and proc_execve().