blob: 05488da3aee9db28e3a233564421efe6971a2a32 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_BINFMTS_H
2#define _LINUX_BINFMTS_H
3
Heiko Carstens96e02d12012-02-04 10:47:10 +01004#include <linux/sched.h>
Al Viro282124d2012-09-30 13:20:09 -04005#include <linux/unistd.h>
Al Viro826eba42012-08-03 12:14:44 +04006#include <asm/exec.h>
David Howells607ca462012-10-13 10:46:48 +01007#include <uapi/linux/binfmts.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Ingo Molnar28851752017-02-05 14:24:31 +01009struct filename;
10
Dan Aloni71ce92f2007-05-16 22:11:16 -070011#define CORENAME_MAX_SIZE 128
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013/*
14 * This structure is used to hold the arguments that are used when loading binaries.
15 */
Mikael Petterssonf670d0e2011-01-12 17:00:02 -080016struct linux_binprm {
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 char buf[BINPRM_BUF_SIZE];
Ollie Wildb6a2fea2007-07-19 01:48:16 -070018#ifdef CONFIG_MMU
19 struct vm_area_struct *vma;
Oleg Nesterov3c77f842010-11-30 20:55:34 +010020 unsigned long vma_pages;
Ollie Wildb6a2fea2007-07-19 01:48:16 -070021#else
22# define MAX_ARG_PAGES 32
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 struct page *page[MAX_ARG_PAGES];
Ollie Wildb6a2fea2007-07-19 01:48:16 -070024#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 struct mm_struct *mm;
26 unsigned long p; /* current top of mem */
Kirill A. Shutemova50b0aa2009-04-02 16:58:29 -070027 unsigned int
David Howellsa6f76f22008-11-14 10:39:24 +110028 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 */
Kirill A. Shutemov53112482008-10-15 22:02:37 -070033#ifdef __alpha__
34 unsigned int taso:1;
35#endif
Oleg Nesterov131b2f92013-09-11 14:24:39 -070036 unsigned int recursion_depth; /* only for search_binary_handler() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 struct file * file;
David Howellsa6f76f22008-11-14 10:39:24 +110038 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 int argc, envc;
David Howellsd7627462010-08-17 23:52:56 +010042 const char * filename; /* Name of binary as seen by procps */
43 const char * interp; /* Name of the binary really executed. Most
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 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
David Drysdale51f39a12014-12-12 16:57:29 -080058/* 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
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080062/* Function parameter for binfmt->coredump */
63struct coredump_params {
Al Viroec579412013-10-13 17:57:29 -040064 const siginfo_t *siginfo;
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080065 struct pt_regs *regs;
66 struct file *file;
67 unsigned long limit;
Masami Hiramatsu30736a42010-03-05 13:44:12 -080068 unsigned long mm_flags;
Al Viroecc8c772013-10-05 15:32:35 -040069 loff_t written;
Mateusz Guzik1607f092016-06-05 23:14:14 +020070 loff_t pos;
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080071};
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/*
74 * This structure defines the functions that are used to load the binary formats that
75 * linux accepts.
76 */
77struct linux_binfmt {
Alexey Dobriyane4dc1b12007-10-16 23:26:03 -070078 struct list_head lh;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 struct module *module;
Al Viro71613c32012-10-20 22:00:48 -040080 int (*load_binary)(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 int (*load_shlib)(struct file *);
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080082 int (*core_dump)(struct coredump_params *cprm);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 unsigned long min_coredump; /* minimal dump size */
84};
85
Al Viro8fc3dc52012-03-17 03:05:16 -040086extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070087
88/* Registration of default binfmt handlers */
Al Viro8fc3dc52012-03-17 03:05:16 -040089static inline void register_binfmt(struct linux_binfmt *fmt)
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070090{
Al Viro8fc3dc52012-03-17 03:05:16 -040091 __register_binfmt(fmt, 0);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070092}
93/* Same as above, but adds a new binfmt at the top of the list */
Al Viro8fc3dc52012-03-17 03:05:16 -040094static inline void insert_binfmt(struct linux_binfmt *fmt)
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070095{
Al Viro8fc3dc52012-03-17 03:05:16 -040096 __register_binfmt(fmt, 1);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070097}
98
Alexey Dobriyanf6b450d2007-10-16 23:26:04 -070099extern void unregister_binfmt(struct linux_binfmt *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101extern int prepare_binprm(struct linux_binprm *);
Ollie Wildb6a2fea2007-07-19 01:48:16 -0700102extern int __must_check remove_arg_zero(struct linux_binprm *);
Al Viro3c456bf2012-10-20 21:53:31 -0400103extern int search_binary_handler(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104extern int flush_old_exec(struct linux_binprm * bprm);
Linus Torvalds221af7f2010-01-28 22:14:42 -0800105extern void setup_new_exec(struct linux_binprm * bprm);
Al Viro1b5d7832011-06-19 12:49:47 -0400106extern void would_dump(struct linux_binprm *, struct file *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Alan Coxd6e71142005-06-23 00:09:43 -0700108extern int suid_dumpable;
Alan Coxd6e71142005-06-23 00:09:43 -0700109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110/* 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);
Nicolas Pitre7e7ec6a2016-07-24 11:30:18 -0400118extern int transfer_args_to_stack(struct linux_binprm *bprm,
119 unsigned long *sp_location);
Kees Cookb66c5982012-12-20 15:05:16 -0800120extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
David Howellsd7627462010-08-17 23:52:56 +0100121extern int copy_strings_kernel(int argc, const char *const *argv,
122 struct linux_binprm *bprm);
Oleg Nesterova2a84742009-09-05 11:17:13 -0700123extern int prepare_bprm_creds(struct linux_binprm *bprm);
David Howellsa6f76f22008-11-14 10:39:24 +1100124extern void install_exec_creds(struct linux_binprm *bprm);
Oleg Nesterov964ee7d2009-09-23 15:56:59 -0700125extern void set_binfmt(struct linux_binfmt *new);
Al Viro3dc20cb2013-04-13 20:31:37 -0400126extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Ingo Molnar28851752017-02-05 14:24:31 +0100128extern 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136#endif /* _LINUX_BINFMTS_H */