include/linux/binfmts.h

   1 #ifndef _LINUX_BINFMTS_H
   2 #define _LINUX_BINFMTS_H
   3
   4 #include <linux/capability.h>
   5
   6 struct pt_regs;
   7
   8 /*
   9  * MAX_ARG_PAGES defines the number of pages allocated for arguments
  10  * and envelope for the new program. 32 should suffice, this gives
  11  * a maximum env+arg of 128kB w/4KB pages!
  12  */
  13 #define MAX_ARG_PAGES 32
  14
  15 /* sizeof(linux_binprm->buf) */
  16 #define BINPRM_BUF_SIZE 128
  17
  18 #ifdef __KERNEL__
  19
  20 /*
  21  * This structure is used to hold the arguments that are used when loading binaries.
  22  */
  23 struct linux_binprm{
  24         char buf[BINPRM_BUF_SIZE];
  25         struct page *page[MAX_ARG_PAGES];
  26         struct mm_struct *mm;
  27         unsigned long p; /* current top of mem */
  28         int sh_bang;
  29         struct file * file;
  30         int e_uid, e_gid;
  31         kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
  32         void *security;
  33         int argc, envc;
  34         char * filename;        /* Name of binary */
  35         unsigned long loader, exec;
  36 };
  37
  38 /*
  39  * This structure defines the functions that are used to load the binary formats that
  40  * linux accepts.
  41  */
  42 struct linux_binfmt {
  43         struct linux_binfmt * next;
  44         struct module *module;
  45         int (*load_binary)(struct linux_binprm *, struct  pt_regs * regs);
  46         int (*load_shlib)(struct file *);
  47         int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
  48         unsigned long min_coredump;     /* minimal dump size */
  49 };
  50
  51 extern int register_binfmt(struct linux_binfmt *);
  52 extern int unregister_binfmt(struct linux_binfmt *);
  53
  54 extern int prepare_binprm(struct linux_binprm *);
  55 extern void remove_arg_zero(struct linux_binprm *);
  56 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
  57 extern int flush_old_exec(struct linux_binprm * bprm);
  58 extern int setup_arg_pages(struct linux_binprm * bprm);
  59 extern int copy_strings(int argc,char __user * __user * argv,struct linux_binprm *bprm);
  60 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
  61 extern void compute_creds(struct linux_binprm *binprm);
  62 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
  63 extern int set_binfmt(struct linux_binfmt *new);
  64
  65 #endif /* __KERNEL__ */
  66 #endif /* _LINUX_BINFMTS_H */