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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__ | |
5cf0cc4e | 21 | #include <linux/list.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 | */ | |
28 | struct linux_binprm{ | |
29 | char buf[BINPRM_BUF_SIZE]; | |
b6a2fea3 OW |
30 | #ifdef CONFIG_MMU |
31 | struct vm_area_struct *vma; | |
32 | #else | |
33 | # define MAX_ARG_PAGES 32 | |
1da177e4 | 34 | struct page *page[MAX_ARG_PAGES]; |
b6a2fea3 | 35 | #endif |
1da177e4 LT |
36 | struct mm_struct *mm; |
37 | unsigned long p; /* current top of mem */ | |
3a2e7f47 | 38 | unsigned int sh_bang:1, |
a6f76f23 DH |
39 | misc_bang:1, |
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 LT |
53 | int argc, envc; |
54 | char * filename; /* Name of binary as seen by procps */ | |
55 | char * interp; /* Name of the binary really executed. Most | |
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; | |
61 | }; | |
62 | ||
63 | #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 | |
64 | #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) | |
65 | ||
66 | /* fd of the binary should be passed to the interpreter */ | |
67 | #define BINPRM_FLAGS_EXECFD_BIT 1 | |
68 | #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT) | |
69 | ||
bf2a9a39 | 70 | #define BINPRM_MAX_RECURSION 4 |
1da177e4 LT |
71 | |
72 | /* | |
73 | * This structure defines the functions that are used to load the binary formats that | |
74 | * linux accepts. | |
75 | */ | |
76 | struct linux_binfmt { | |
e4dc1b14 | 77 | struct list_head lh; |
1da177e4 LT |
78 | struct module *module; |
79 | int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); | |
80 | int (*load_shlib)(struct file *); | |
7dc0b22e | 81 | int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); |
1da177e4 | 82 | unsigned long min_coredump; /* minimal dump size */ |
9fbbd4dd | 83 | int hasvdso; |
1da177e4 LT |
84 | }; |
85 | ||
86 | extern int register_binfmt(struct linux_binfmt *); | |
f6b450d4 | 87 | extern void unregister_binfmt(struct linux_binfmt *); |
1da177e4 LT |
88 | |
89 | extern int prepare_binprm(struct linux_binprm *); | |
b6a2fea3 | 90 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
1da177e4 LT |
91 | extern int search_binary_handler(struct linux_binprm *,struct pt_regs *); |
92 | extern int flush_old_exec(struct linux_binprm * bprm); | |
93 | ||
d6e71144 AC |
94 | extern int suid_dumpable; |
95 | #define SUID_DUMP_DISABLE 0 /* No setuid dumping */ | |
96 | #define SUID_DUMP_USER 1 /* Dump as user of process */ | |
97 | #define SUID_DUMP_ROOT 2 /* Dump as root */ | |
98 | ||
1da177e4 LT |
99 | /* Stack area protections */ |
100 | #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */ | |
101 | #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */ | |
102 | #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */ | |
103 | ||
104 | extern int setup_arg_pages(struct linux_binprm * bprm, | |
105 | unsigned long stack_top, | |
106 | int executable_stack); | |
b6a2fea3 | 107 | extern int bprm_mm_init(struct linux_binprm *bprm); |
1da177e4 | 108 | extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm); |
a6f76f23 | 109 | extern void install_exec_creds(struct linux_binprm *bprm); |
1da177e4 LT |
110 | extern int do_coredump(long signr, int exit_code, struct pt_regs * regs); |
111 | extern int set_binfmt(struct linux_binfmt *new); | |
08a6fac1 | 112 | extern void free_bprm(struct linux_binprm *); |
1da177e4 LT |
113 | |
114 | #endif /* __KERNEL__ */ | |
115 | #endif /* _LINUX_BINFMTS_H */ |