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 unsigned int sh_bang:1,
38 misc_bang:1;
39#ifdef __alpha__
40 unsigned int taso:1;
41#endif
42 unsigned int recursion_depth;
43 struct file * file;
44 int e_uid, e_gid;
45 kernel_cap_t cap_post_exec_permitted;
46 bool cap_effective;
47 void *security;
48 int argc, envc;
49 char * filename; /* Name of binary as seen by procps */
50 char * interp; /* Name of the binary really executed. Most
51 of the time same as filename, but could be
52 different for binfmt_{misc,script} */
53 unsigned interp_flags;
54 unsigned interp_data;
55 unsigned long loader, exec;
56};
57
58#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
59#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
60
61/* fd of the binary should be passed to the interpreter */
62#define BINPRM_FLAGS_EXECFD_BIT 1
63#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
64
65#define BINPRM_MAX_RECURSION 4
66
67/*
68 * This structure defines the functions that are used to load the binary formats that
69 * linux accepts.
70 */
71struct linux_binfmt {
72 struct list_head lh;
73 struct module *module;
74 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
75 int (*load_shlib)(struct file *);
76 int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
77 unsigned long min_coredump; /* minimal dump size */
78 int hasvdso;
79};
80
81extern int register_binfmt(struct linux_binfmt *);
82extern void unregister_binfmt(struct linux_binfmt *);
83
84extern int prepare_binprm(struct linux_binprm *);
85extern int __must_check remove_arg_zero(struct linux_binprm *);
86extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
87extern int flush_old_exec(struct linux_binprm * bprm);
88
89extern int suid_dumpable;
90#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
91#define SUID_DUMP_USER 1 /* Dump as user of process */
92#define SUID_DUMP_ROOT 2 /* Dump as root */
93
94/* Stack area protections */
95#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
96#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
97#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
98
99extern int setup_arg_pages(struct linux_binprm * bprm,
100 unsigned long stack_top,
101 int executable_stack);
102extern int bprm_mm_init(struct linux_binprm *bprm);
103extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
104extern void compute_creds(struct linux_binprm *binprm);
105extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
106extern int set_binfmt(struct linux_binfmt *new);
107extern void free_bprm(struct linux_binprm *);
108
109#endif /* __KERNEL__ */
110#endif /* _LINUX_BINFMTS_H */