1 #ifndef _LINUX_BINFMTS_H
2 #define _LINUX_BINFMTS_H
4 #include <linux/capability.h>
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.
14 #define MAX_ARG_STRLEN (PAGE_SIZE * 32)
15 #define MAX_ARG_STRINGS 0x7FFFFFFF
17 /* sizeof(linux_binprm->buf) */
18 #define BINPRM_BUF_SIZE 128
22 #define CORENAME_MAX_SIZE 128
25 * This structure is used to hold the arguments that are used when loading binaries.
28 char buf[BINPRM_BUF_SIZE];
30 struct vm_area_struct *vma;
32 # define MAX_ARG_PAGES 32
33 struct page *page[MAX_ARG_PAGES];
36 unsigned long p; /* current top of mem */
37 unsigned int sh_bang:1,
39 cred_prepared:1,/* true if creds already prepared (multiple
40 * preps happen for interpreters) */
41 cap_effective:1;/* true if has elevated effective capabilities,
42 * false if not; except for init which inherits
43 * its parent's caps anyway */
47 unsigned int recursion_depth;
49 struct cred *cred; /* new credentials */
50 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
51 unsigned int per_clear; /* bits to clear in current->personality */
53 char * filename; /* Name of binary as seen by procps */
54 char * interp; /* Name of the binary really executed. Most
55 of the time same as filename, but could be
56 different for binfmt_{misc,script} */
57 unsigned interp_flags;
59 unsigned long loader, exec;
62 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
63 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
65 /* fd of the binary should be passed to the interpreter */
66 #define BINPRM_FLAGS_EXECFD_BIT 1
67 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
69 #define BINPRM_MAX_RECURSION 4
72 * This structure defines the functions that are used to load the binary formats that
77 struct module *module;
78 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
79 int (*load_shlib)(struct file *);
80 int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
81 unsigned long min_coredump; /* minimal dump size */
85 extern int register_binfmt(struct linux_binfmt *);
86 extern void unregister_binfmt(struct linux_binfmt *);
88 extern int prepare_binprm(struct linux_binprm *);
89 extern int __must_check remove_arg_zero(struct linux_binprm *);
90 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
91 extern int flush_old_exec(struct linux_binprm * bprm);
93 extern int suid_dumpable;
94 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
95 #define SUID_DUMP_USER 1 /* Dump as user of process */
96 #define SUID_DUMP_ROOT 2 /* Dump as root */
98 /* Stack area protections */
99 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
100 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
101 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
103 extern int setup_arg_pages(struct linux_binprm * bprm,
104 unsigned long stack_top,
105 int executable_stack);
106 extern int bprm_mm_init(struct linux_binprm *bprm);
107 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
108 extern void install_exec_creds(struct linux_binprm *bprm);
109 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
110 extern int set_binfmt(struct linux_binfmt *new);
111 extern void free_bprm(struct linux_binprm *);
113 #endif /* __KERNEL__ */
114 #endif /* _LINUX_BINFMTS_H */