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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_BINFMTS_H |
3 | #define _LINUX_BINFMTS_H | |
4 | ||
96e02d15 | 5 | #include <linux/sched.h> |
282124d1 | 6 | #include <linux/unistd.h> |
826eba4d | 7 | #include <asm/exec.h> |
607ca46e | 8 | #include <uapi/linux/binfmts.h> |
1da177e4 | 9 | |
28851755 IM |
10 | struct filename; |
11 | ||
71ce92f3 DA |
12 | #define CORENAME_MAX_SIZE 128 |
13 | ||
1da177e4 LT |
14 | /* |
15 | * This structure is used to hold the arguments that are used when loading binaries. | |
16 | */ | |
f670d0ec | 17 | struct linux_binprm { |
1da177e4 | 18 | char buf[BINPRM_BUF_SIZE]; |
b6a2fea3 OW |
19 | #ifdef CONFIG_MMU |
20 | struct vm_area_struct *vma; | |
3c77f845 | 21 | unsigned long vma_pages; |
b6a2fea3 OW |
22 | #else |
23 | # define MAX_ARG_PAGES 32 | |
1da177e4 | 24 | struct page *page[MAX_ARG_PAGES]; |
b6a2fea3 | 25 | #endif |
1da177e4 LT |
26 | struct mm_struct *mm; |
27 | unsigned long p; /* current top of mem */ | |
a50b0aa4 | 28 | unsigned int |
ddb4a144 KC |
29 | /* |
30 | * True after the bprm_set_creds hook has been called once | |
31 | * (multiple calls can be made via prepare_binprm() for | |
32 | * binfmt_script/misc). | |
33 | */ | |
34 | called_set_creds:1, | |
46d98eb4 KC |
35 | /* |
36 | * True if most recent call to the commoncaps bprm_set_creds | |
37 | * hook (due to multiple prepare_binprm() calls from the | |
38 | * binfmt_script/misc handlers) resulted in elevated | |
39 | * privileges. | |
40 | */ | |
41 | cap_elevated:1, | |
c425e189 KC |
42 | /* |
43 | * Set by bprm_set_creds hook to indicate a privilege-gaining | |
44 | * exec has happened. Used to sanitize execution environment | |
45 | * and to set AT_SECURE auxv for glibc. | |
46 | */ | |
47 | secureexec:1; | |
53112488 KS |
48 | #ifdef __alpha__ |
49 | unsigned int taso:1; | |
50 | #endif | |
131b2f9f | 51 | unsigned int recursion_depth; /* only for search_binary_handler() */ |
1da177e4 | 52 | struct file * file; |
a6f76f23 DH |
53 | struct cred *cred; /* new credentials */ |
54 | int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */ | |
55 | unsigned int per_clear; /* bits to clear in current->personality */ | |
1da177e4 | 56 | int argc, envc; |
d7627467 DH |
57 | const char * filename; /* Name of binary as seen by procps */ |
58 | const char * interp; /* Name of the binary really executed. Most | |
1da177e4 LT |
59 | of the time same as filename, but could be |
60 | different for binfmt_{misc,script} */ | |
61 | unsigned interp_flags; | |
62 | unsigned interp_data; | |
63 | unsigned long loader, exec; | |
c31dbb14 KC |
64 | |
65 | struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */ | |
3859a271 | 66 | } __randomize_layout; |
1da177e4 LT |
67 | |
68 | #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 | |
69 | #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) | |
70 | ||
71 | /* fd of the binary should be passed to the interpreter */ | |
72 | #define BINPRM_FLAGS_EXECFD_BIT 1 | |
73 | #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT) | |
74 | ||
51f39a1f DD |
75 | /* filename of the binary will be inaccessible after exec */ |
76 | #define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2 | |
77 | #define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT) | |
78 | ||
f6151dfe MH |
79 | /* Function parameter for binfmt->coredump */ |
80 | struct coredump_params { | |
ae7795bc | 81 | const kernel_siginfo_t *siginfo; |
f6151dfe MH |
82 | struct pt_regs *regs; |
83 | struct file *file; | |
84 | unsigned long limit; | |
30736a4d | 85 | unsigned long mm_flags; |
ecc8c772 | 86 | loff_t written; |
1607f09c | 87 | loff_t pos; |
f6151dfe MH |
88 | }; |
89 | ||
1da177e4 LT |
90 | /* |
91 | * This structure defines the functions that are used to load the binary formats that | |
92 | * linux accepts. | |
93 | */ | |
94 | struct linux_binfmt { | |
e4dc1b14 | 95 | struct list_head lh; |
1da177e4 | 96 | struct module *module; |
71613c3b | 97 | int (*load_binary)(struct linux_binprm *); |
1da177e4 | 98 | int (*load_shlib)(struct file *); |
f6151dfe | 99 | int (*core_dump)(struct coredump_params *cprm); |
1da177e4 | 100 | unsigned long min_coredump; /* minimal dump size */ |
3859a271 | 101 | } __randomize_layout; |
1da177e4 | 102 | |
8fc3dc5a | 103 | extern void __register_binfmt(struct linux_binfmt *fmt, int insert); |
74641f58 IK |
104 | |
105 | /* Registration of default binfmt handlers */ | |
8fc3dc5a | 106 | static inline void register_binfmt(struct linux_binfmt *fmt) |
74641f58 | 107 | { |
8fc3dc5a | 108 | __register_binfmt(fmt, 0); |
74641f58 IK |
109 | } |
110 | /* Same as above, but adds a new binfmt at the top of the list */ | |
8fc3dc5a | 111 | static inline void insert_binfmt(struct linux_binfmt *fmt) |
74641f58 | 112 | { |
8fc3dc5a | 113 | __register_binfmt(fmt, 1); |
74641f58 IK |
114 | } |
115 | ||
f6b450d4 | 116 | extern void unregister_binfmt(struct linux_binfmt *); |
1da177e4 LT |
117 | |
118 | extern int prepare_binprm(struct linux_binprm *); | |
b6a2fea3 | 119 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
3c456bfc | 120 | extern int search_binary_handler(struct linux_binprm *); |
1da177e4 | 121 | extern int flush_old_exec(struct linux_binprm * bprm); |
221af7f8 | 122 | extern void setup_new_exec(struct linux_binprm * bprm); |
b8383831 | 123 | extern void finalize_exec(struct linux_binprm *bprm); |
1b5d783c | 124 | extern void would_dump(struct linux_binprm *, struct file *); |
1da177e4 | 125 | |
d6e71144 | 126 | extern int suid_dumpable; |
d6e71144 | 127 | |
1da177e4 LT |
128 | /* Stack area protections */ |
129 | #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */ | |
130 | #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */ | |
131 | #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */ | |
132 | ||
133 | extern int setup_arg_pages(struct linux_binprm * bprm, | |
134 | unsigned long stack_top, | |
135 | int executable_stack); | |
7e7ec6a9 NP |
136 | extern int transfer_args_to_stack(struct linux_binprm *bprm, |
137 | unsigned long *sp_location); | |
c2315c18 | 138 | extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm); |
d7627467 DH |
139 | extern int copy_strings_kernel(int argc, const char *const *argv, |
140 | struct linux_binprm *bprm); | |
a2a8474c | 141 | extern int prepare_bprm_creds(struct linux_binprm *bprm); |
a6f76f23 | 142 | extern void install_exec_creds(struct linux_binprm *bprm); |
964ee7df | 143 | extern void set_binfmt(struct linux_binfmt *new); |
3dc20cb2 | 144 | extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t); |
1da177e4 | 145 | |
28851755 IM |
146 | extern int do_execve(struct filename *, |
147 | const char __user * const __user *, | |
148 | const char __user * const __user *); | |
149 | extern int do_execveat(int, struct filename *, | |
150 | const char __user * const __user *, | |
151 | const char __user * const __user *, | |
152 | int); | |
449325b5 | 153 | int do_execve_file(struct file *file, void *__argv, void *__envp); |
28851755 | 154 | |
1da177e4 | 155 | #endif /* _LINUX_BINFMTS_H */ |