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 * MAX_ARG_PAGES defines the number of pages allocated for arguments
10 * and envelope for the new program. 32 should suffice, this gives
11 * a maximum env+arg of 128kB w/4KB pages!
12 */
13#define MAX_ARG_PAGES 32
14
15/* sizeof(linux_binprm->buf) */
16#define BINPRM_BUF_SIZE 128
17
18#ifdef __KERNEL__
19
20#define CORENAME_MAX_SIZE 128
21
22/*
23 * This structure is used to hold the arguments that are used when loading binaries.
24 */
25struct linux_binprm{
26 char buf[BINPRM_BUF_SIZE];
27 struct page *page[MAX_ARG_PAGES];
28 struct mm_struct *mm;
29 unsigned long p; /* current top of mem */
30 int sh_bang;
31 struct file * file;
32 int e_uid, e_gid;
33 kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
34 void *security;
35 int argc, envc;
36 char * filename; /* Name of binary as seen by procps */
37 char * interp; /* Name of the binary really executed. Most
38 of the time same as filename, but could be
39 different for binfmt_{misc,script} */
40 unsigned interp_flags;
41 unsigned interp_data;
42 unsigned long loader, exec;
43};
44
45#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
46#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
47
48/* fd of the binary should be passed to the interpreter */
49#define BINPRM_FLAGS_EXECFD_BIT 1
50#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
51
52
53/*
54 * This structure defines the functions that are used to load the binary formats that
55 * linux accepts.
56 */
57struct linux_binfmt {
58 struct linux_binfmt * next;
59 struct module *module;
60 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
61 int (*load_shlib)(struct file *);
62 int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
63 unsigned long min_coredump; /* minimal dump size */
64 int hasvdso;
65};
66
67extern int register_binfmt(struct linux_binfmt *);
68extern int unregister_binfmt(struct linux_binfmt *);
69
70extern int prepare_binprm(struct linux_binprm *);
71extern void remove_arg_zero(struct linux_binprm *);
72extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
73extern int flush_old_exec(struct linux_binprm * bprm);
74
75extern int suid_dumpable;
76#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
77#define SUID_DUMP_USER 1 /* Dump as user of process */
78#define SUID_DUMP_ROOT 2 /* Dump as root */
79
80/* Stack area protections */
81#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
82#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
83#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
84
85extern int setup_arg_pages(struct linux_binprm * bprm,
86 unsigned long stack_top,
87 int executable_stack);
88extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
89extern void compute_creds(struct linux_binprm *binprm);
90extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
91extern int set_binfmt(struct linux_binfmt *new);
92
93#endif /* __KERNEL__ */
94#endif /* _LINUX_BINFMTS_H */