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
21 #include <linux/list.h>
23 #define CORENAME_MAX_SIZE 128
26 * This structure is used to hold the arguments that are used when loading binaries.
29 char buf[BINPRM_BUF_SIZE];
31 struct vm_area_struct *vma;
33 # define MAX_ARG_PAGES 32
34 struct page *page[MAX_ARG_PAGES];
37 unsigned long p; /* current top of mem */
38 unsigned int sh_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 */
48 unsigned int recursion_depth;
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 */
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;
60 unsigned long loader, exec;
63 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
64 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
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)
70 #define BINPRM_MAX_RECURSION 4
73 * This structure defines the functions that are used to load the binary formats that
78 struct module *module;
79 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
80 int (*load_shlib)(struct file *);
81 int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
82 unsigned long min_coredump; /* minimal dump size */
86 extern int register_binfmt(struct linux_binfmt *);
87 extern void unregister_binfmt(struct linux_binfmt *);
89 extern int prepare_binprm(struct linux_binprm *);
90 extern int __must_check remove_arg_zero(struct linux_binprm *);
91 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
92 extern int flush_old_exec(struct linux_binprm * bprm);
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 */
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 */
104 extern int setup_arg_pages(struct linux_binprm * bprm,
105 unsigned long stack_top,
106 int executable_stack);
107 extern int bprm_mm_init(struct linux_binprm *bprm);
108 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
109 extern void install_exec_creds(struct linux_binprm *bprm);
110 extern void do_coredump(long signr, int exit_code, struct pt_regs *regs);
111 extern int set_binfmt(struct linux_binfmt *new);
112 extern void free_bprm(struct linux_binprm *);
114 #endif /* __KERNEL__ */
115 #endif /* _LINUX_BINFMTS_H */