1 #ifndef _LINUX_BINFMTS_H
2 #define _LINUX_BINFMTS_H
4 #include <linux/sched.h>
5 #include <linux/unistd.h>
7 #include <uapi/linux/binfmts.h>
9 #define CORENAME_MAX_SIZE 128
12 * This structure is used to hold the arguments that are used when loading binaries.
15 char buf
[BINPRM_BUF_SIZE
];
17 struct vm_area_struct
*vma
;
18 unsigned long vma_pages
;
20 # define MAX_ARG_PAGES 32
21 struct page
*page
[MAX_ARG_PAGES
];
24 unsigned long p
; /* current top of mem */
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 */
34 unsigned int recursion_depth
;
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 */
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
;
46 unsigned long loader
, exec
;
47 char tcomm
[TASK_COMM_LEN
];
50 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
51 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
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)
57 /* Function parameter for binfmt->coredump */
58 struct coredump_params
{
63 unsigned long mm_flags
;
67 * This structure defines the functions that are used to load the binary formats that
72 struct module
*module
;
73 int (*load_binary
)(struct linux_binprm
*);
74 int (*load_shlib
)(struct file
*);
75 int (*core_dump
)(struct coredump_params
*cprm
);
76 unsigned long min_coredump
; /* minimal dump size */
79 extern void __register_binfmt(struct linux_binfmt
*fmt
, int insert
);
81 /* Registration of default binfmt handlers */
82 static inline void register_binfmt(struct linux_binfmt
*fmt
)
84 __register_binfmt(fmt
, 0);
86 /* Same as above, but adds a new binfmt at the top of the list */
87 static inline void insert_binfmt(struct linux_binfmt
*fmt
)
89 __register_binfmt(fmt
, 1);
92 extern void unregister_binfmt(struct linux_binfmt
*);
94 extern int prepare_binprm(struct linux_binprm
*);
95 extern int __must_check
remove_arg_zero(struct linux_binprm
*);
96 extern int search_binary_handler(struct linux_binprm
*);
97 extern int flush_old_exec(struct linux_binprm
* bprm
);
98 extern void setup_new_exec(struct linux_binprm
* bprm
);
99 extern void would_dump(struct linux_binprm
*, struct file
*);
101 extern int suid_dumpable
;
102 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
103 #define SUID_DUMP_USER 1 /* Dump as user of process */
104 #define SUID_DUMP_ROOT 2 /* Dump as root */
106 /* Stack area protections */
107 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
108 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
109 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
111 extern int setup_arg_pages(struct linux_binprm
* bprm
,
112 unsigned long stack_top
,
113 int executable_stack
);
114 extern int bprm_change_interp(char *interp
, struct linux_binprm
*bprm
);
115 extern int copy_strings_kernel(int argc
, const char *const *argv
,
116 struct linux_binprm
*bprm
);
117 extern int prepare_bprm_creds(struct linux_binprm
*bprm
);
118 extern void install_exec_creds(struct linux_binprm
*bprm
);
119 extern void set_binfmt(struct linux_binfmt
*new);
120 extern void free_bprm(struct linux_binprm
*);
121 extern ssize_t
read_code(struct file
*, unsigned long, loff_t
, size_t);
123 #endif /* _LINUX_BINFMTS_H */