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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__ | |
21 | ||
71ce92f3 DA |
22 | #define CORENAME_MAX_SIZE 128 |
23 | ||
1da177e4 LT |
24 | /* |
25 | * This structure is used to hold the arguments that are used when loading binaries. | |
26 | */ | |
27 | struct linux_binprm{ | |
28 | char buf[BINPRM_BUF_SIZE]; | |
b6a2fea3 OW |
29 | #ifdef CONFIG_MMU |
30 | struct vm_area_struct *vma; | |
31 | #else | |
32 | # define MAX_ARG_PAGES 32 | |
1da177e4 | 33 | struct page *page[MAX_ARG_PAGES]; |
b6a2fea3 | 34 | #endif |
1da177e4 LT |
35 | struct mm_struct *mm; |
36 | unsigned long p; /* current top of mem */ | |
37 | int sh_bang; | |
38 | struct file * file; | |
39 | int e_uid, e_gid; | |
40 | kernel_cap_t cap_inheritable, cap_permitted, cap_effective; | |
41 | void *security; | |
42 | int argc, envc; | |
43 | char * filename; /* Name of binary as seen by procps */ | |
44 | char * interp; /* Name of the binary really executed. Most | |
45 | of the time same as filename, but could be | |
46 | different for binfmt_{misc,script} */ | |
47 | unsigned interp_flags; | |
48 | unsigned interp_data; | |
49 | unsigned long loader, exec; | |
bdf4c48a | 50 | unsigned long argv_len; |
1da177e4 LT |
51 | }; |
52 | ||
53 | #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 | |
54 | #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) | |
55 | ||
56 | /* fd of the binary should be passed to the interpreter */ | |
57 | #define BINPRM_FLAGS_EXECFD_BIT 1 | |
58 | #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT) | |
59 | ||
60 | ||
61 | /* | |
62 | * This structure defines the functions that are used to load the binary formats that | |
63 | * linux accepts. | |
64 | */ | |
65 | struct linux_binfmt { | |
66 | struct linux_binfmt * next; | |
67 | struct module *module; | |
68 | int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); | |
69 | int (*load_shlib)(struct file *); | |
70 | int (*core_dump)(long signr, struct pt_regs * regs, struct file * file); | |
71 | unsigned long min_coredump; /* minimal dump size */ | |
9fbbd4dd | 72 | int hasvdso; |
1da177e4 LT |
73 | }; |
74 | ||
75 | extern int register_binfmt(struct linux_binfmt *); | |
76 | extern int unregister_binfmt(struct linux_binfmt *); | |
77 | ||
78 | extern int prepare_binprm(struct linux_binprm *); | |
b6a2fea3 | 79 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
1da177e4 LT |
80 | extern int search_binary_handler(struct linux_binprm *,struct pt_regs *); |
81 | extern int flush_old_exec(struct linux_binprm * bprm); | |
82 | ||
d6e71144 AC |
83 | extern int suid_dumpable; |
84 | #define SUID_DUMP_DISABLE 0 /* No setuid dumping */ | |
85 | #define SUID_DUMP_USER 1 /* Dump as user of process */ | |
86 | #define SUID_DUMP_ROOT 2 /* Dump as root */ | |
87 | ||
1da177e4 LT |
88 | /* Stack area protections */ |
89 | #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */ | |
90 | #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */ | |
91 | #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */ | |
92 | ||
93 | extern int setup_arg_pages(struct linux_binprm * bprm, | |
94 | unsigned long stack_top, | |
95 | int executable_stack); | |
b6a2fea3 | 96 | extern int bprm_mm_init(struct linux_binprm *bprm); |
1da177e4 LT |
97 | extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm); |
98 | extern void compute_creds(struct linux_binprm *binprm); | |
99 | extern int do_coredump(long signr, int exit_code, struct pt_regs * regs); | |
100 | extern int set_binfmt(struct linux_binfmt *new); | |
101 | ||
102 | #endif /* __KERNEL__ */ | |
103 | #endif /* _LINUX_BINFMTS_H */ |