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1da177e4 LT |
1 | #ifndef _LINUX_BINFMTS_H |
2 | #define _LINUX_BINFMTS_H | |
3 | ||
4 | #include <linux/capability.h> | |
5 | ||
6 | struct pt_regs; | |
7 | ||
8 | /* | |
b6a2fea3 OW |
9 | * These are the maximum length and maximum number of strings passed to the |
10 | * execve() system call. MAX_ARG_STRLEN is essentially random but serves to | |
11 | * prevent the kernel from being unduly impacted by misaddressed pointers. | |
12 | * MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer. | |
1da177e4 | 13 | */ |
b6a2fea3 OW |
14 | #define MAX_ARG_STRLEN (PAGE_SIZE * 32) |
15 | #define MAX_ARG_STRINGS 0x7FFFFFFF | |
1da177e4 LT |
16 | |
17 | /* sizeof(linux_binprm->buf) */ | |
18 | #define BINPRM_BUF_SIZE 128 | |
19 | ||
20 | #ifdef __KERNEL__ | |
96e02d15 | 21 | #include <linux/sched.h> |
1da177e4 | 22 | |
71ce92f3 DA |
23 | #define CORENAME_MAX_SIZE 128 |
24 | ||
1da177e4 LT |
25 | /* |
26 | * This structure is used to hold the arguments that are used when loading binaries. | |
27 | */ | |
f670d0ec | 28 | struct linux_binprm { |
1da177e4 | 29 | char buf[BINPRM_BUF_SIZE]; |
b6a2fea3 OW |
30 | #ifdef CONFIG_MMU |
31 | struct vm_area_struct *vma; | |
3c77f845 | 32 | unsigned long vma_pages; |
b6a2fea3 OW |
33 | #else |
34 | # define MAX_ARG_PAGES 32 | |
1da177e4 | 35 | struct page *page[MAX_ARG_PAGES]; |
b6a2fea3 | 36 | #endif |
1da177e4 LT |
37 | struct mm_struct *mm; |
38 | unsigned long p; /* current top of mem */ | |
a50b0aa4 | 39 | unsigned int |
a6f76f23 DH |
40 | cred_prepared:1,/* true if creds already prepared (multiple |
41 | * preps happen for interpreters) */ | |
42 | cap_effective:1;/* true if has elevated effective capabilities, | |
43 | * false if not; except for init which inherits | |
44 | * its parent's caps anyway */ | |
53112488 KS |
45 | #ifdef __alpha__ |
46 | unsigned int taso:1; | |
47 | #endif | |
bf2a9a39 | 48 | unsigned int recursion_depth; |
1da177e4 | 49 | struct file * file; |
a6f76f23 DH |
50 | struct cred *cred; /* new credentials */ |
51 | int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */ | |
52 | unsigned int per_clear; /* bits to clear in current->personality */ | |
1da177e4 | 53 | int argc, envc; |
d7627467 DH |
54 | const char * filename; /* Name of binary as seen by procps */ |
55 | const char * interp; /* Name of the binary really executed. Most | |
1da177e4 LT |
56 | of the time same as filename, but could be |
57 | different for binfmt_{misc,script} */ | |
58 | unsigned interp_flags; | |
59 | unsigned interp_data; | |
60 | unsigned long loader, exec; | |
96e02d15 | 61 | char tcomm[TASK_COMM_LEN]; |
1da177e4 LT |
62 | }; |
63 | ||
64 | #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 | |
65 | #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) | |
66 | ||
67 | /* fd of the binary should be passed to the interpreter */ | |
68 | #define BINPRM_FLAGS_EXECFD_BIT 1 | |
69 | #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT) | |
70 | ||
bf2a9a39 | 71 | #define BINPRM_MAX_RECURSION 4 |
1da177e4 | 72 | |
f6151dfe MH |
73 | /* Function parameter for binfmt->coredump */ |
74 | struct coredump_params { | |
5ab1c309 | 75 | siginfo_t *siginfo; |
f6151dfe MH |
76 | struct pt_regs *regs; |
77 | struct file *file; | |
78 | unsigned long limit; | |
30736a4d | 79 | unsigned long mm_flags; |
f6151dfe MH |
80 | }; |
81 | ||
1da177e4 LT |
82 | /* |
83 | * This structure defines the functions that are used to load the binary formats that | |
84 | * linux accepts. | |
85 | */ | |
86 | struct linux_binfmt { | |
e4dc1b14 | 87 | struct list_head lh; |
1da177e4 LT |
88 | struct module *module; |
89 | int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); | |
90 | int (*load_shlib)(struct file *); | |
f6151dfe | 91 | int (*core_dump)(struct coredump_params *cprm); |
1da177e4 LT |
92 | unsigned long min_coredump; /* minimal dump size */ |
93 | }; | |
94 | ||
8fc3dc5a | 95 | extern void __register_binfmt(struct linux_binfmt *fmt, int insert); |
74641f58 IK |
96 | |
97 | /* Registration of default binfmt handlers */ | |
8fc3dc5a | 98 | static inline void register_binfmt(struct linux_binfmt *fmt) |
74641f58 | 99 | { |
8fc3dc5a | 100 | __register_binfmt(fmt, 0); |
74641f58 IK |
101 | } |
102 | /* Same as above, but adds a new binfmt at the top of the list */ | |
8fc3dc5a | 103 | static inline void insert_binfmt(struct linux_binfmt *fmt) |
74641f58 | 104 | { |
8fc3dc5a | 105 | __register_binfmt(fmt, 1); |
74641f58 IK |
106 | } |
107 | ||
f6b450d4 | 108 | extern void unregister_binfmt(struct linux_binfmt *); |
1da177e4 LT |
109 | |
110 | extern int prepare_binprm(struct linux_binprm *); | |
b6a2fea3 | 111 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
f670d0ec | 112 | extern int search_binary_handler(struct linux_binprm *, struct pt_regs *); |
1da177e4 | 113 | extern int flush_old_exec(struct linux_binprm * bprm); |
221af7f8 | 114 | extern void setup_new_exec(struct linux_binprm * bprm); |
1b5d783c | 115 | extern void would_dump(struct linux_binprm *, struct file *); |
1da177e4 | 116 | |
d6e71144 AC |
117 | extern int suid_dumpable; |
118 | #define SUID_DUMP_DISABLE 0 /* No setuid dumping */ | |
119 | #define SUID_DUMP_USER 1 /* Dump as user of process */ | |
120 | #define SUID_DUMP_ROOT 2 /* Dump as root */ | |
121 | ||
1da177e4 LT |
122 | /* Stack area protections */ |
123 | #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */ | |
124 | #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */ | |
125 | #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */ | |
126 | ||
127 | extern int setup_arg_pages(struct linux_binprm * bprm, | |
128 | unsigned long stack_top, | |
129 | int executable_stack); | |
b6a2fea3 | 130 | extern int bprm_mm_init(struct linux_binprm *bprm); |
d7627467 DH |
131 | extern int copy_strings_kernel(int argc, const char *const *argv, |
132 | struct linux_binprm *bprm); | |
a2a8474c | 133 | extern int prepare_bprm_creds(struct linux_binprm *bprm); |
a6f76f23 | 134 | extern void install_exec_creds(struct linux_binprm *bprm); |
964ee7df | 135 | extern void set_binfmt(struct linux_binfmt *new); |
08a6fac1 | 136 | extern void free_bprm(struct linux_binprm *); |
1da177e4 LT |
137 | |
138 | #endif /* __KERNEL__ */ | |
139 | #endif /* _LINUX_BINFMTS_H */ |