Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_BINFMTS_H |
| 2 | #define _LINUX_BINFMTS_H |
| 3 | |
| 4 | #include <linux/capability.h> |
| 5 | |
| 6 | struct pt_regs; |
| 7 | |
| 8 | /* |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 14 | #define MAX_ARG_STRLEN (PAGE_SIZE * 32) |
| 15 | #define MAX_ARG_STRINGS 0x7FFFFFFF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
| 17 | /* sizeof(linux_binprm->buf) */ |
| 18 | #define BINPRM_BUF_SIZE 128 |
| 19 | |
| 20 | #ifdef __KERNEL__ |
Hiroshi Shimamoto | 5cf0cc4 | 2009-01-06 14:41:38 -0800 | [diff] [blame^] | 21 | #include <linux/list.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Dan Aloni | 71ce92f | 2007-05-16 22:11:16 -0700 | [diff] [blame] | 23 | #define CORENAME_MAX_SIZE 128 |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | /* |
| 26 | * This structure is used to hold the arguments that are used when loading binaries. |
| 27 | */ |
| 28 | struct linux_binprm{ |
| 29 | char buf[BINPRM_BUF_SIZE]; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 30 | #ifdef CONFIG_MMU |
| 31 | struct vm_area_struct *vma; |
| 32 | #else |
| 33 | # define MAX_ARG_PAGES 32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | struct page *page[MAX_ARG_PAGES]; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 35 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | struct mm_struct *mm; |
| 37 | unsigned long p; /* current top of mem */ |
Pavel Emelyanov | 3a2e7f4 | 2008-04-29 00:59:24 -0700 | [diff] [blame] | 38 | unsigned int sh_bang:1, |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 39 | misc_bang:1, |
| 40 | cred_prepared:1,/* true if creds already prepared (multiple |
| 41 | * preps happen for interpreters) */ |
| 42 | cap_effective:1;/* true if has elevated effective capabilities, |
| 43 | * false if not; except for init which inherits |
| 44 | * its parent's caps anyway */ |
Kirill A. Shutemov | 5311248 | 2008-10-15 22:02:37 -0700 | [diff] [blame] | 45 | #ifdef __alpha__ |
| 46 | unsigned int taso:1; |
| 47 | #endif |
Kirill A. Shutemov | bf2a9a3 | 2008-10-15 22:02:39 -0700 | [diff] [blame] | 48 | unsigned int recursion_depth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | struct file * file; |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 50 | struct cred *cred; /* new credentials */ |
| 51 | int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */ |
| 52 | unsigned int per_clear; /* bits to clear in current->personality */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | int argc, envc; |
| 54 | char * filename; /* Name of binary as seen by procps */ |
| 55 | char * interp; /* Name of the binary really executed. Most |
| 56 | of the time same as filename, but could be |
| 57 | different for binfmt_{misc,script} */ |
| 58 | unsigned interp_flags; |
| 59 | unsigned interp_data; |
| 60 | unsigned long loader, exec; |
| 61 | }; |
| 62 | |
| 63 | #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0 |
| 64 | #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT) |
| 65 | |
| 66 | /* fd of the binary should be passed to the interpreter */ |
| 67 | #define BINPRM_FLAGS_EXECFD_BIT 1 |
| 68 | #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT) |
| 69 | |
Kirill A. Shutemov | bf2a9a3 | 2008-10-15 22:02:39 -0700 | [diff] [blame] | 70 | #define BINPRM_MAX_RECURSION 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | /* |
| 73 | * This structure defines the functions that are used to load the binary formats that |
| 74 | * linux accepts. |
| 75 | */ |
| 76 | struct linux_binfmt { |
Alexey Dobriyan | e4dc1b1 | 2007-10-16 23:26:03 -0700 | [diff] [blame] | 77 | struct list_head lh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | struct module *module; |
| 79 | int (*load_binary)(struct linux_binprm *, struct pt_regs * regs); |
| 80 | int (*load_shlib)(struct file *); |
Neil Horman | 7dc0b22 | 2007-10-16 23:26:34 -0700 | [diff] [blame] | 81 | int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | unsigned long min_coredump; /* minimal dump size */ |
Andi Kleen | 9fbbd4d | 2007-02-13 13:26:26 +0100 | [diff] [blame] | 83 | int hasvdso; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | }; |
| 85 | |
| 86 | extern int register_binfmt(struct linux_binfmt *); |
Alexey Dobriyan | f6b450d | 2007-10-16 23:26:04 -0700 | [diff] [blame] | 87 | extern void unregister_binfmt(struct linux_binfmt *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | extern int prepare_binprm(struct linux_binprm *); |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 90 | extern int __must_check remove_arg_zero(struct linux_binprm *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | extern int search_binary_handler(struct linux_binprm *,struct pt_regs *); |
| 92 | extern int flush_old_exec(struct linux_binprm * bprm); |
| 93 | |
Alan Cox | d6e7114 | 2005-06-23 00:09:43 -0700 | [diff] [blame] | 94 | extern int suid_dumpable; |
| 95 | #define SUID_DUMP_DISABLE 0 /* No setuid dumping */ |
| 96 | #define SUID_DUMP_USER 1 /* Dump as user of process */ |
| 97 | #define SUID_DUMP_ROOT 2 /* Dump as root */ |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /* Stack area protections */ |
| 100 | #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */ |
| 101 | #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */ |
| 102 | #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */ |
| 103 | |
| 104 | extern int setup_arg_pages(struct linux_binprm * bprm, |
| 105 | unsigned long stack_top, |
| 106 | int executable_stack); |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 107 | extern int bprm_mm_init(struct linux_binprm *bprm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm); |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 109 | extern void install_exec_creds(struct linux_binprm *bprm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | extern int do_coredump(long signr, int exit_code, struct pt_regs * regs); |
| 111 | extern int set_binfmt(struct linux_binfmt *new); |
Al Viro | 08a6fac | 2008-05-10 16:38:25 -0400 | [diff] [blame] | 112 | extern void free_bprm(struct linux_binprm *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | #endif /* __KERNEL__ */ |
| 115 | #endif /* _LINUX_BINFMTS_H */ |