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#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__

#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;

#else

# define MAX_ARG_PAGES  32

        struct page *page[MAX_ARG_PAGES];

#endif

        struct mm_struct *mm;

        unsigned long p; /* current top of mem */

        int sh_bang;

        struct file * file;

        int e_uid, e_gid;

        kernel_cap_t cap_inheritable, cap_permitted;

        bool cap_effective;

        void *security;

        int argc, envc;

        char * filename;        /* Name of binary as seen by procps */

        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;

        unsigned long argv_len;

};

#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)

/*

 * 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)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);

        unsigned long min_coredump;     /* minimal dump size */

        int hasvdso;

};

extern int register_binfmt(struct linux_binfmt *);

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 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,char ** argv,struct linux_binprm *bprm);

extern void compute_creds(struct linux_binprm *binprm);

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

extern int set_binfmt(struct linux_binfmt *new);

#endif /* __KERNEL__ */

#endif /* _LINUX_BINFMTS_H */