Commit | Line | Data |
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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 { |
b6a2fea3 OW |
18 | #ifdef CONFIG_MMU |
19 | struct vm_area_struct *vma; | |
3c77f845 | 20 | unsigned long vma_pages; |
b6a2fea3 OW |
21 | #else |
22 | # define MAX_ARG_PAGES 32 | |
1da177e4 | 23 | struct page *page[MAX_ARG_PAGES]; |
b6a2fea3 | 24 | #endif |
1da177e4 LT |
25 | struct mm_struct *mm; |
26 | unsigned long p; /* current top of mem */ | |
655c16a8 | 27 | unsigned long argmin; /* rlimit marker for copy_strings() */ |
a50b0aa4 | 28 | unsigned int |
b8a61c9e EB |
29 | /* Should an execfd be passed to userspace? */ |
30 | have_execfd:1, | |
31 | ||
56305aa9 EB |
32 | /* Use the creds of a script (see binfmt_misc) */ |
33 | execfd_creds:1, | |
c425e189 | 34 | /* |
b8bff599 EB |
35 | * Set by bprm_creds_for_exec hook to indicate a |
36 | * privilege-gaining exec has happened. Used to set | |
37 | * AT_SECURE auxv for glibc. | |
c425e189 | 38 | */ |
eea96732 EB |
39 | secureexec:1, |
40 | /* | |
1507b7a3 EB |
41 | * Set when errors can no longer be returned to the |
42 | * original userspace. | |
eea96732 | 43 | */ |
1507b7a3 | 44 | point_of_no_return:1; |
53112488 KS |
45 | #ifdef __alpha__ |
46 | unsigned int taso:1; | |
47 | #endif | |
b8a61c9e | 48 | struct file * executable; /* Executable to pass to the interpreter */ |
bc2bf338 | 49 | struct file * interpreter; |
1da177e4 | 50 | struct file * file; |
a6f76f23 DH |
51 | struct cred *cred; /* new credentials */ |
52 | int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */ | |
53 | unsigned int per_clear; /* bits to clear in current->personality */ | |
1da177e4 | 54 | int argc, envc; |
d7627467 DH |
55 | const char * filename; /* Name of binary as seen by procps */ |
56 | const char * interp; /* Name of the binary really executed. Most | |
1da177e4 LT |
57 | of the time same as filename, but could be |
58 | different for binfmt_{misc,script} */ | |
59 | unsigned interp_flags; | |
b8a61c9e | 60 | int execfd; /* File descriptor of the executable */ |
1da177e4 | 61 | unsigned long loader, exec; |
c31dbb14 KC |
62 | |
63 | struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */ | |
a6231d19 AD |
64 | |
65 | char buf[BINPRM_BUF_SIZE]; | |
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 | ||
51f39a1f DD |
71 | /* filename of the binary will be inaccessible after exec */ |
72 | #define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2 | |
73 | #define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT) | |
74 | ||
f6151dfe MH |
75 | /* Function parameter for binfmt->coredump */ |
76 | struct coredump_params { | |
ae7795bc | 77 | const kernel_siginfo_t *siginfo; |
f6151dfe MH |
78 | struct pt_regs *regs; |
79 | struct file *file; | |
80 | unsigned long limit; | |
30736a4d | 81 | unsigned long mm_flags; |
ecc8c772 | 82 | loff_t written; |
1607f09c | 83 | loff_t pos; |
f6151dfe MH |
84 | }; |
85 | ||
1da177e4 LT |
86 | /* |
87 | * This structure defines the functions that are used to load the binary formats that | |
88 | * linux accepts. | |
89 | */ | |
90 | struct linux_binfmt { | |
e4dc1b14 | 91 | struct list_head lh; |
1da177e4 | 92 | struct module *module; |
71613c3b | 93 | int (*load_binary)(struct linux_binprm *); |
1da177e4 | 94 | int (*load_shlib)(struct file *); |
f6151dfe | 95 | int (*core_dump)(struct coredump_params *cprm); |
1da177e4 | 96 | unsigned long min_coredump; /* minimal dump size */ |
3859a271 | 97 | } __randomize_layout; |
1da177e4 | 98 | |
8fc3dc5a | 99 | extern void __register_binfmt(struct linux_binfmt *fmt, int insert); |
74641f58 IK |
100 | |
101 | /* Registration of default binfmt handlers */ | |
8fc3dc5a | 102 | static inline void register_binfmt(struct linux_binfmt *fmt) |
74641f58 | 103 | { |
8fc3dc5a | 104 | __register_binfmt(fmt, 0); |
74641f58 IK |
105 | } |
106 | /* Same as above, but adds a new binfmt at the top of the list */ | |
8fc3dc5a | 107 | static inline void insert_binfmt(struct linux_binfmt *fmt) |
74641f58 | 108 | { |
8fc3dc5a | 109 | __register_binfmt(fmt, 1); |
74641f58 IK |
110 | } |
111 | ||
f6b450d4 | 112 | extern void unregister_binfmt(struct linux_binfmt *); |
1da177e4 | 113 | |
b6a2fea3 | 114 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
2388777a | 115 | extern int begin_new_exec(struct linux_binprm * bprm); |
221af7f8 | 116 | extern void setup_new_exec(struct linux_binprm * bprm); |
b8383831 | 117 | extern void finalize_exec(struct linux_binprm *bprm); |
1b5d783c | 118 | extern void would_dump(struct linux_binprm *, struct file *); |
1da177e4 | 119 | |
d6e71144 | 120 | extern int suid_dumpable; |
d6e71144 | 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); | |
7e7ec6a9 NP |
130 | extern int transfer_args_to_stack(struct linux_binprm *bprm, |
131 | unsigned long *sp_location); | |
c2315c18 | 132 | extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm); |
986db2d1 | 133 | int copy_string_kernel(const char *arg, struct linux_binprm *bprm); |
964ee7df | 134 | extern void set_binfmt(struct linux_binfmt *new); |
3dc20cb2 | 135 | extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t); |
1da177e4 | 136 | |
28851755 IM |
137 | extern int do_execve(struct filename *, |
138 | const char __user * const __user *, | |
139 | const char __user * const __user *); | |
140 | extern int do_execveat(int, struct filename *, | |
141 | const char __user * const __user *, | |
142 | const char __user * const __user *, | |
143 | int); | |
449325b5 | 144 | int do_execve_file(struct file *file, void *__argv, void *__envp); |
28851755 | 145 | |
1da177e4 | 146 | #endif /* _LINUX_BINFMTS_H */ |