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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
Dan Aloni71ce92f2007-05-16 22:11:16 -07009#define CORENAME_MAX_SIZE 128
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011/*
12 * This structure is used to hold the arguments that are used when loading binaries.
13 */
Mikael Petterssonf670d0e2011-01-12 17:00:02 -080014struct linux_binprm {
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 char buf[BINPRM_BUF_SIZE];
Ollie Wildb6a2fea2007-07-19 01:48:16 -070016#ifdef CONFIG_MMU
17 struct vm_area_struct *vma;
Oleg Nesterov3c77f842010-11-30 20:55:34 +010018 unsigned long vma_pages;
Ollie Wildb6a2fea2007-07-19 01:48:16 -070019#else
20# define MAX_ARG_PAGES 32
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 struct page *page[MAX_ARG_PAGES];
Ollie Wildb6a2fea2007-07-19 01:48:16 -070022#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 struct mm_struct *mm;
24 unsigned long p; /* current top of mem */
Kirill A. Shutemova50b0aa2009-04-02 16:58:29 -070025 unsigned int
David Howellsa6f76f22008-11-14 10:39:24 +110026 cred_prepared:1,/* true if creds already prepared (multiple
27 * preps happen for interpreters) */
28 cap_effective:1;/* true if has elevated effective capabilities,
29 * false if not; except for init which inherits
30 * its parent's caps anyway */
Kirill A. Shutemov53112482008-10-15 22:02:37 -070031#ifdef __alpha__
32 unsigned int taso:1;
33#endif
Kirill A. Shutemovbf2a9a32008-10-15 22:02:39 -070034 unsigned int recursion_depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 struct file * file;
David Howellsa6f76f22008-11-14 10:39:24 +110036 struct cred *cred; /* new credentials */
37 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
38 unsigned int per_clear; /* bits to clear in current->personality */
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 int argc, envc;
David Howellsd7627462010-08-17 23:52:56 +010040 const char * filename; /* Name of binary as seen by procps */
41 const char * interp; /* Name of the binary really executed. Most
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 of the time same as filename, but could be
43 different for binfmt_{misc,script} */
44 unsigned interp_flags;
45 unsigned interp_data;
46 unsigned long loader, exec;
Heiko Carstens96e02d12012-02-04 10:47:10 +010047 char tcomm[TASK_COMM_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -070048};
49
50#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
51#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
52
53/* fd of the binary should be passed to the interpreter */
54#define BINPRM_FLAGS_EXECFD_BIT 1
55#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
56
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080057/* Function parameter for binfmt->coredump */
58struct coredump_params {
Denys Vlasenko5ab1c302012-10-04 17:15:29 -070059 siginfo_t *siginfo;
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080060 struct pt_regs *regs;
61 struct file *file;
62 unsigned long limit;
Masami Hiramatsu30736a42010-03-05 13:44:12 -080063 unsigned long mm_flags;
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080064};
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066/*
67 * This structure defines the functions that are used to load the binary formats that
68 * linux accepts.
69 */
70struct linux_binfmt {
Alexey Dobriyane4dc1b12007-10-16 23:26:03 -070071 struct list_head lh;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 struct module *module;
Al Viro71613c32012-10-20 22:00:48 -040073 int (*load_binary)(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 int (*load_shlib)(struct file *);
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080075 int (*core_dump)(struct coredump_params *cprm);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 unsigned long min_coredump; /* minimal dump size */
77};
78
Al Viro8fc3dc52012-03-17 03:05:16 -040079extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070080
81/* Registration of default binfmt handlers */
Al Viro8fc3dc52012-03-17 03:05:16 -040082static inline void register_binfmt(struct linux_binfmt *fmt)
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070083{
Al Viro8fc3dc52012-03-17 03:05:16 -040084 __register_binfmt(fmt, 0);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070085}
86/* Same as above, but adds a new binfmt at the top of the list */
Al Viro8fc3dc52012-03-17 03:05:16 -040087static inline void insert_binfmt(struct linux_binfmt *fmt)
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070088{
Al Viro8fc3dc52012-03-17 03:05:16 -040089 __register_binfmt(fmt, 1);
Ivan Kokshaysky74641f52009-04-30 15:08:49 -070090}
91
Alexey Dobriyanf6b450d2007-10-16 23:26:04 -070092extern void unregister_binfmt(struct linux_binfmt *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94extern int prepare_binprm(struct linux_binprm *);
Ollie Wildb6a2fea2007-07-19 01:48:16 -070095extern int __must_check remove_arg_zero(struct linux_binprm *);
Al Viro3c456bf2012-10-20 21:53:31 -040096extern int search_binary_handler(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097extern int flush_old_exec(struct linux_binprm * bprm);
Linus Torvalds221af7f2010-01-28 22:14:42 -080098extern void setup_new_exec(struct linux_binprm * bprm);
Al Viro1b5d7832011-06-19 12:49:47 -040099extern void would_dump(struct linux_binprm *, struct file *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Alan Coxd6e71142005-06-23 00:09:43 -0700101extern int suid_dumpable;
102#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
103#define SUID_DUMP_USER 1 /* Dump as user of process */
104#define SUID_DUMP_ROOT 2 /* Dump as root */
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106/* Stack area protections */
107#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
108#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
109#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
110
111extern int setup_arg_pages(struct linux_binprm * bprm,
112 unsigned long stack_top,
113 int executable_stack);
Kees Cookb66c5982012-12-20 15:05:16 -0800114extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
David Howellsd7627462010-08-17 23:52:56 +0100115extern int copy_strings_kernel(int argc, const char *const *argv,
116 struct linux_binprm *bprm);
Oleg Nesterova2a84742009-09-05 11:17:13 -0700117extern int prepare_bprm_creds(struct linux_binprm *bprm);
David Howellsa6f76f22008-11-14 10:39:24 +1100118extern void install_exec_creds(struct linux_binprm *bprm);
Oleg Nesterov964ee7d2009-09-23 15:56:59 -0700119extern void set_binfmt(struct linux_binfmt *new);
Al Viro08a6fac2008-05-10 16:38:25 -0400120extern void free_bprm(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122#endif /* _LINUX_BINFMTS_H */