release/src-rt-6.x/linux/linux-2.6/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 #define CORENAME_MAX_SIZE 128
  21
  22 /*
  23  * This structure is used to hold the arguments that are used when loading binaries.
  24  */
  25 struct linux_binprm{
  26         char buf[BINPRM_BUF_SIZE];
  27         struct page *page[MAX_ARG_PAGES];
  28         struct mm_struct *mm;
  29         unsigned long p; /* current top of mem */
  30         int sh_bang;
  31         struct file * file;
  32         int e_uid, e_gid;
  33         kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
  34         void *security;
  35         int argc, envc;
  36         char * filename;        /* Name of binary as seen by procps */
  37         char * interp;          /* Name of the binary really executed. Most
  38                                    of the time same as filename, but could be
  39                                    different for binfmt_{misc,script} */
  40         unsigned interp_flags;
  41         unsigned interp_data;
  42         unsigned long loader, exec;
  43 };
  44
  45 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
  46 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
  47
  48 /* fd of the binary should be passed to the interpreter */
  49 #define BINPRM_FLAGS_EXECFD_BIT 1
  50 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
  51
  52
  53 /*
  54  * This structure defines the functions that are used to load the binary formats that
  55  * linux accepts.
  56  */
  57 struct linux_binfmt {
  58         struct linux_binfmt * next;
  59         struct module *module;
  60         int (*load_binary)(struct linux_binprm *, struct  pt_regs * regs);
  61         int (*load_shlib)(struct file *);
  62         int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
  63         unsigned long min_coredump;     /* minimal dump size */
  64         int hasvdso;
  65 };
  66
  67 extern int register_binfmt(struct linux_binfmt *);
  68 extern int unregister_binfmt(struct linux_binfmt *);
  69
  70 extern int prepare_binprm(struct linux_binprm *);
  71 extern void remove_arg_zero(struct linux_binprm *);
  72 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
  73 extern int flush_old_exec(struct linux_binprm * bprm);
  74
  75 extern int suid_dumpable;
  76 #define SUID_DUMP_DISABLE       0       /* No setuid dumping */
  77 #define SUID_DUMP_USER          1       /* Dump as user of process */
  78 #define SUID_DUMP_ROOT          2       /* Dump as root */
  79
  80 /* Stack area protections */
  81 #define EXSTACK_DEFAULT   0     /* Whatever the arch defaults to */
  82 #define EXSTACK_DISABLE_X 1     /* Disable executable stacks */
  83 #define EXSTACK_ENABLE_X  2     /* Enable executable stacks */
  84
  85 extern int setup_arg_pages(struct linux_binprm * bprm,
  86                            unsigned long stack_top,
  87                            int executable_stack);
  88 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
  89 extern void compute_creds(struct linux_binprm *binprm);
  90 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
  91 extern int set_binfmt(struct linux_binfmt *new);
  92
  93 #endif /* __KERNEL__ */
  94 #endif /* _LINUX_BINFMTS_H */