Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_BINFMTS_H
2#define _LINUX_BINFMTS_H
3
4#include <linux/capability.h>
5
6struct pt_regs;
7
8/*
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.
13 */
14#define MAX_ARG_STRLEN (PAGE_SIZE * 32)
15#define MAX_ARG_STRINGS 0x7FFFFFFF
16
17/* sizeof(linux_binprm->buf) */
18#define BINPRM_BUF_SIZE 128
19
20#ifdef __KERNEL__
21
22#define CORENAME_MAX_SIZE 128
23
24/*
25 * This structure is used to hold the arguments that are used when loading binaries.
26 */
27struct linux_binprm{
28 char buf[BINPRM_BUF_SIZE];
29#ifdef CONFIG_MMU
30 struct vm_area_struct *vma;
31#else
32# define MAX_ARG_PAGES 32
33 struct page *page[MAX_ARG_PAGES];
34#endif
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;
41 bool cap_effective;
42 void *security;
43 int argc, envc;
44 char * filename; /* Name of binary as seen by procps */
45 char * interp; /* Name of the binary really executed. Most
46 of the time same as filename, but could be
47 different for binfmt_{misc,script} */
48 unsigned interp_flags;
49 unsigned interp_data;
50 unsigned long loader, exec;
51 unsigned long argv_len;
52};
53
54#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
55#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
56
57/* fd of the binary should be passed to the interpreter */
58#define BINPRM_FLAGS_EXECFD_BIT 1
59#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
60
61
62/*
63 * This structure defines the functions that are used to load the binary formats that
64 * linux accepts.
65 */
66struct linux_binfmt {
67 struct list_head lh;
68 struct module *module;
69 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
70 int (*load_shlib)(struct file *);
71 int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
72 unsigned long min_coredump; /* minimal dump size */
73 int hasvdso;
74};
75
76extern int register_binfmt(struct linux_binfmt *);
77extern void unregister_binfmt(struct linux_binfmt *);
78
79extern int prepare_binprm(struct linux_binprm *);
80extern int __must_check remove_arg_zero(struct linux_binprm *);
81extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
82extern int flush_old_exec(struct linux_binprm * bprm);
83
84extern int suid_dumpable;
85#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
86#define SUID_DUMP_USER 1 /* Dump as user of process */
87#define SUID_DUMP_ROOT 2 /* Dump as root */
88
89/* Stack area protections */
90#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
91#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
92#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
93
94extern int setup_arg_pages(struct linux_binprm * bprm,
95 unsigned long stack_top,
96 int executable_stack);
97extern int bprm_mm_init(struct linux_binprm *bprm);
98extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
99extern void compute_creds(struct linux_binprm *binprm);
100extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
101extern int set_binfmt(struct linux_binfmt *new);
102
103#endif /* __KERNEL__ */
104#endif /* _LINUX_BINFMTS_H */