linux/include/linux/binfmts.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BINFMTS_H
#define _LINUX_BINFMTS_H

#include <linux/sched.h>
#include <linux/unistd.h>
#include <asm/exec.h>
#include <uapi/linux/binfmts.h>

struct filename;
struct coredump_params;

#define CORENAME_MAX_SIZE …

/*
 * This structure is used to hold the arguments that are used when loading binaries.
 */
struct linux_binprm { … } __randomize_layout;

#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT …
#define BINPRM_FLAGS_ENFORCE_NONDUMP …

/* filename of the binary will be inaccessible after exec */
#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT …
#define BINPRM_FLAGS_PATH_INACCESSIBLE …

/* preserve argv0 for the interpreter  */
#define BINPRM_FLAGS_PRESERVE_ARGV0_BIT …
#define BINPRM_FLAGS_PRESERVE_ARGV0 …

/*
 * This structure defines the functions that are used to load the binary formats that
 * linux accepts.
 */
struct linux_binfmt { … } __randomize_layout;

#if IS_ENABLED(CONFIG_BINFMT_MISC)
struct binfmt_misc { … } __randomize_layout;

extern struct binfmt_misc init_binfmt_misc;
#endif

extern void __register_binfmt(struct linux_binfmt *fmt, int insert);

/* Registration of default binfmt handlers */
static inline void register_binfmt(struct linux_binfmt *fmt)
{ … }
/* Same as above, but adds a new binfmt at the top of the list */
static inline void insert_binfmt(struct linux_binfmt *fmt)
{ … }

extern void unregister_binfmt(struct linux_binfmt *);

extern int __must_check remove_arg_zero(struct linux_binprm *);
extern int begin_new_exec(struct linux_binprm * bprm);
extern void setup_new_exec(struct linux_binprm * bprm);
extern void finalize_exec(struct linux_binprm *bprm);
extern void would_dump(struct linux_binprm *, struct file *);

extern int suid_dumpable;

/* Stack area protections */
#define EXSTACK_DEFAULT …
#define EXSTACK_DISABLE_X …
#define EXSTACK_ENABLE_X …

extern int setup_arg_pages(struct linux_binprm * bprm,
			   unsigned long stack_top,
			   int executable_stack);
extern int transfer_args_to_stack(struct linux_binprm *bprm,
				  unsigned long *sp_location);
extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
int copy_string_kernel(const char *arg, struct linux_binprm *bprm);
extern void set_binfmt(struct linux_binfmt *new);
extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);

int kernel_execve(const char *filename,
		  const char *const *argv, const char *const *envp);

#endif /* _LINUX_BINFMTS_H */