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/sched.h>
5#include <linux/unistd.h>
6#include <asm/exec.h>
7#include <uapi/linux/binfmts.h>
8
9struct filename;
10
11#define CORENAME_MAX_SIZE 128
12
13/*
14 * This structure is used to hold the arguments that are used when loading binaries.
15 */
16struct linux_binprm {
17 char buf[BINPRM_BUF_SIZE];
18#ifdef CONFIG_MMU
19 struct vm_area_struct *vma;
20 unsigned long vma_pages;
21#else
22# define MAX_ARG_PAGES 32
23 struct page *page[MAX_ARG_PAGES];
24#endif
25 struct mm_struct *mm;
26 unsigned long p; /* current top of mem */
27 unsigned int
28 cred_prepared:1,/* true if creds already prepared (multiple
29 * preps happen for interpreters) */
30 cap_effective:1;/* true if has elevated effective capabilities,
31 * false if not; except for init which inherits
32 * its parent's caps anyway */
33#ifdef __alpha__
34 unsigned int taso:1;
35#endif
36 unsigned int recursion_depth; /* only for search_binary_handler() */
37 struct file * file;
38 struct cred *cred; /* new credentials */
39 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
40 unsigned int per_clear; /* bits to clear in current->personality */
41 int argc, envc;
42 const char * filename; /* Name of binary as seen by procps */
43 const char * interp; /* Name of the binary really executed. Most
44 of the time same as filename, but could be
45 different for binfmt_{misc,script} */
46 unsigned interp_flags;
47 unsigned interp_data;
48 unsigned long loader, exec;
49};
50
51#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
52#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
53
54/* fd of the binary should be passed to the interpreter */
55#define BINPRM_FLAGS_EXECFD_BIT 1
56#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
57
58/* filename of the binary will be inaccessible after exec */
59#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2
60#define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT)
61
62/* Function parameter for binfmt->coredump */
63struct coredump_params {
64 const siginfo_t *siginfo;
65 struct pt_regs *regs;
66 struct file *file;
67 unsigned long limit;
68 unsigned long mm_flags;
69 loff_t written;
70 loff_t pos;
71};
72
73/*
74 * This structure defines the functions that are used to load the binary formats that
75 * linux accepts.
76 */
77struct linux_binfmt {
78 struct list_head lh;
79 struct module *module;
80 int (*load_binary)(struct linux_binprm *);
81 int (*load_shlib)(struct file *);
82 int (*core_dump)(struct coredump_params *cprm);
83 unsigned long min_coredump; /* minimal dump size */
84};
85
86extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
87
88/* Registration of default binfmt handlers */
89static inline void register_binfmt(struct linux_binfmt *fmt)
90{
91 __register_binfmt(fmt, 0);
92}
93/* Same as above, but adds a new binfmt at the top of the list */
94static inline void insert_binfmt(struct linux_binfmt *fmt)
95{
96 __register_binfmt(fmt, 1);
97}
98
99extern void unregister_binfmt(struct linux_binfmt *);
100
101extern int prepare_binprm(struct linux_binprm *);
102extern int __must_check remove_arg_zero(struct linux_binprm *);
103extern int search_binary_handler(struct linux_binprm *);
104extern int flush_old_exec(struct linux_binprm * bprm);
105extern void setup_new_exec(struct linux_binprm * bprm);
106extern void would_dump(struct linux_binprm *, struct file *);
107
108extern int suid_dumpable;
109
110/* Stack area protections */
111#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
112#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
113#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
114
115extern int setup_arg_pages(struct linux_binprm * bprm,
116 unsigned long stack_top,
117 int executable_stack);
118extern int transfer_args_to_stack(struct linux_binprm *bprm,
119 unsigned long *sp_location);
120extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
121extern int copy_strings_kernel(int argc, const char *const *argv,
122 struct linux_binprm *bprm);
123extern int prepare_bprm_creds(struct linux_binprm *bprm);
124extern void install_exec_creds(struct linux_binprm *bprm);
125extern void set_binfmt(struct linux_binfmt *new);
126extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
127
128extern int do_execve(struct filename *,
129 const char __user * const __user *,
130 const char __user * const __user *);
131extern int do_execveat(int, struct filename *,
132 const char __user * const __user *,
133 const char __user * const __user *,
134 int);
135
136#endif /* _LINUX_BINFMTS_H */