#ifndef _LINUX_BINFMTS_H
  #define _LINUX_BINFMTS_H
  
  #include <linux/capability.h>
  
  struct pt_regs;
  
  /*

   * These are the maximum length and maximum number of strings passed to the
   * execve() system call.  MAX_ARG_STRLEN is essentially random but serves to
   * prevent the kernel from being unduly impacted by misaddressed pointers.
   * MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer.

   */

  #define MAX_ARG_STRLEN (PAGE_SIZE * 32)
  #define MAX_ARG_STRINGS 0x7FFFFFFF

  
  /* sizeof(linux_binprm->buf) */
  #define BINPRM_BUF_SIZE 128
  
  #ifdef __KERNEL__

  #include <linux/list.h>

  #define CORENAME_MAX_SIZE 128

  /*
   * This structure is used to hold the arguments that are used when loading binaries.
   */

  struct linux_binprm {

  	char buf[BINPRM_BUF_SIZE];

  #ifdef CONFIG_MMU
  	struct vm_area_struct *vma;

  	unsigned long vma_pages;

  #else
  # define MAX_ARG_PAGES	32

  	struct page *page[MAX_ARG_PAGES];

  #endif

  	struct mm_struct *mm;
  	unsigned long p; /* current top of mem */

  	unsigned int

  		cred_prepared:1,/* true if creds already prepared (multiple
  				 * preps happen for interpreters) */
  		cap_effective:1;/* true if has elevated effective capabilities,
  				 * false if not; except for init which inherits
  				 * its parent's caps anyway */

  #ifdef __alpha__
  	unsigned int taso:1;
  #endif

  	unsigned int recursion_depth;

  	struct file * file;

  	struct cred *cred;	/* new credentials */
  	int unsafe;		/* how unsafe this exec is (mask of LSM_UNSAFE_*) */
  	unsigned int per_clear;	/* bits to clear in current->personality */

  	int argc, envc;

  	const char * filename;	/* Name of binary as seen by procps */
  	const char * interp;	/* Name of the binary really executed. Most

  				   of the time same as filename, but could be
  				   different for binfmt_{misc,script} */
  	unsigned interp_flags;
  	unsigned interp_data;
  	unsigned long loader, exec;
  };
  
  #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
  #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
  
  /* fd of the binary should be passed to the interpreter */
  #define BINPRM_FLAGS_EXECFD_BIT 1
  #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)

  #define BINPRM_MAX_RECURSION 4

  /* Function parameter for binfmt->coredump */
  struct coredump_params {
  	long signr;
  	struct pt_regs *regs;
  	struct file *file;
  	unsigned long limit;

  	unsigned long mm_flags;

  };

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

  	struct list_head lh;

  	struct module *module;
  	int (*load_binary)(struct linux_binprm *, struct  pt_regs * regs);
  	int (*load_shlib)(struct file *);

  	int (*core_dump)(struct coredump_params *cprm);

  	unsigned long min_coredump;	/* minimal dump size */
  };

  extern int __register_binfmt(struct linux_binfmt *fmt, int insert);
  
  /* Registration of default binfmt handlers */
  static inline int register_binfmt(struct linux_binfmt *fmt)
  {
  	return __register_binfmt(fmt, 0);
  }
  /* Same as above, but adds a new binfmt at the top of the list */
  static inline int insert_binfmt(struct linux_binfmt *fmt)
  {
  	return __register_binfmt(fmt, 1);
  }

  extern void unregister_binfmt(struct linux_binfmt *);

  
  extern int prepare_binprm(struct linux_binprm *);

  extern int __must_check remove_arg_zero(struct linux_binprm *);

  extern int search_binary_handler(struct linux_binprm *, struct pt_regs *);

  extern int flush_old_exec(struct linux_binprm * bprm);

  extern void setup_new_exec(struct linux_binprm * bprm);

  extern void would_dump(struct linux_binprm *, struct file *);

  extern int suid_dumpable;
  #define SUID_DUMP_DISABLE	0	/* No setuid dumping */
  #define SUID_DUMP_USER		1	/* Dump as user of process */
  #define SUID_DUMP_ROOT		2	/* Dump as root */

  /* Stack area protections */
  #define EXSTACK_DEFAULT   0	/* Whatever the arch defaults to */
  #define EXSTACK_DISABLE_X 1	/* Disable executable stacks */
  #define EXSTACK_ENABLE_X  2	/* Enable executable stacks */
  
  extern int setup_arg_pages(struct linux_binprm * bprm,
  			   unsigned long stack_top,
  			   int executable_stack);

  extern int bprm_mm_init(struct linux_binprm *bprm);

  extern int copy_strings_kernel(int argc, const char *const *argv,
  			       struct linux_binprm *bprm);

  extern int prepare_bprm_creds(struct linux_binprm *bprm);

  extern void install_exec_creds(struct linux_binprm *bprm);

  extern void do_coredump(long signr, int exit_code, struct pt_regs *regs);

  extern void set_binfmt(struct linux_binfmt *new);

  extern void free_bprm(struct linux_binprm *);

  
  #endif /* __KERNEL__ */
  #endif /* _LINUX_BINFMTS_H */