linux/include/linux/binfmts.h
<<
>>
Prefs
   1#ifndef _LINUX_BINFMTS_H
   2#define _LINUX_BINFMTS_H
   3
   4#include <linux/sched.h>
   5#include <linux/unistd.h>
   6#include <asm/exec.h>
   7#include <uapi/linux/binfmts.h>
   8
   9#define CORENAME_MAX_SIZE 128
  10
  11/*
  12 * This structure is used to hold the arguments that are used when loading binaries.
  13 */
  14struct linux_binprm {
  15        char buf[BINPRM_BUF_SIZE];
  16#ifdef CONFIG_MMU
  17        struct vm_area_struct *vma;
  18        unsigned long vma_pages;
  19#else
  20# define MAX_ARG_PAGES  32
  21        struct page *page[MAX_ARG_PAGES];
  22#endif
  23        struct mm_struct *mm;
  24        unsigned long p; /* current top of mem */
  25        unsigned int
  26                cred_prepared:1,/* true if creds already prepared (multiple
  27                                 * preps happen for interpreters) */
  28                cap_effective:1;/* true if has elevated effective capabilities,
  29                                 * false if not; except for init which inherits
  30                                 * its parent's caps anyway */
  31#ifdef __alpha__
  32        unsigned int taso:1;
  33#endif
  34        unsigned int recursion_depth;
  35        struct file * file;
  36        struct cred *cred;      /* new credentials */
  37        int unsafe;             /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
  38        unsigned int per_clear; /* bits to clear in current->personality */
  39        int argc, envc;
  40        const char * filename;  /* Name of binary as seen by procps */
  41        const char * interp;    /* Name of the binary really executed. Most
  42                                   of the time same as filename, but could be
  43                                   different for binfmt_{misc,script} */
  44        unsigned interp_flags;
  45        unsigned interp_data;
  46        unsigned long loader, exec;
  47        char tcomm[TASK_COMM_LEN];
  48};
  49
  50#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
  51#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
  52
  53/* fd of the binary should be passed to the interpreter */
  54#define BINPRM_FLAGS_EXECFD_BIT 1
  55#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
  56
  57#define BINPRM_MAX_RECURSION 4
  58
  59/* Function parameter for binfmt->coredump */
  60struct coredump_params {
  61        siginfo_t *siginfo;
  62        struct pt_regs *regs;
  63        struct file *file;
  64        unsigned long limit;
  65        unsigned long mm_flags;
  66};
  67
  68/*
  69 * This structure defines the functions that are used to load the binary formats that
  70 * linux accepts.
  71 */
  72struct linux_binfmt {
  73        struct list_head lh;
  74        struct module *module;
  75        int (*load_binary)(struct linux_binprm *, struct  pt_regs * regs);
  76        int (*load_shlib)(struct file *);
  77        int (*core_dump)(struct coredump_params *cprm);
  78        unsigned long min_coredump;     /* minimal dump size */
  79};
  80
  81extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
  82
  83/* Registration of default binfmt handlers */
  84static inline void register_binfmt(struct linux_binfmt *fmt)
  85{
  86        __register_binfmt(fmt, 0);
  87}
  88/* Same as above, but adds a new binfmt at the top of the list */
  89static inline void insert_binfmt(struct linux_binfmt *fmt)
  90{
  91        __register_binfmt(fmt, 1);
  92}
  93
  94extern void unregister_binfmt(struct linux_binfmt *);
  95
  96extern int prepare_binprm(struct linux_binprm *);
  97extern int __must_check remove_arg_zero(struct linux_binprm *);
  98extern int search_binary_handler(struct linux_binprm *, struct pt_regs *);
  99extern int flush_old_exec(struct linux_binprm * bprm);
 100extern void setup_new_exec(struct linux_binprm * bprm);
 101extern void would_dump(struct linux_binprm *, struct file *);
 102
 103extern int suid_dumpable;
 104#define SUID_DUMP_DISABLE       0       /* No setuid dumping */
 105#define SUID_DUMP_USER          1       /* Dump as user of process */
 106#define SUID_DUMP_ROOT          2       /* Dump as root */
 107
 108/* Stack area protections */
 109#define EXSTACK_DEFAULT   0     /* Whatever the arch defaults to */
 110#define EXSTACK_DISABLE_X 1     /* Disable executable stacks */
 111#define EXSTACK_ENABLE_X  2     /* Enable executable stacks */
 112
 113extern int setup_arg_pages(struct linux_binprm * bprm,
 114                           unsigned long stack_top,
 115                           int executable_stack);
 116extern int bprm_mm_init(struct linux_binprm *bprm);
 117extern int copy_strings_kernel(int argc, const char *const *argv,
 118                               struct linux_binprm *bprm);
 119extern int prepare_bprm_creds(struct linux_binprm *bprm);
 120extern void install_exec_creds(struct linux_binprm *bprm);
 121extern void set_binfmt(struct linux_binfmt *new);
 122extern void free_bprm(struct linux_binprm *);
 123
 124#ifdef __ARCH_WANT_KERNEL_EXECVE
 125extern void ret_from_kernel_execve(struct pt_regs *normal) __noreturn;
 126#endif
 127
 128#endif /* _LINUX_BINFMTS_H */
 129
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.