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,
44 kernel_cap_t cap_post_exec_permitted;
48 char * filename; /* Name of binary as seen by procps */
49 char * interp; /* Name of the binary really executed. Most
50 of the time same as filename, but could be
51 different for binfmt_{misc,script} */
52 unsigned interp_flags;
54 unsigned long loader, exec;
57 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
58 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
60 /* fd of the binary should be passed to the interpreter */
61 #define BINPRM_FLAGS_EXECFD_BIT 1
62 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
66 * This structure defines the functions that are used to load the binary formats that
71 struct module *module;
72 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
73 int (*load_shlib)(struct file *);
74 int (*core_dump)(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
75 unsigned long min_coredump; /* minimal dump size */
79 extern int register_binfmt(struct linux_binfmt *);
80 extern void unregister_binfmt(struct linux_binfmt *);
82 extern int prepare_binprm(struct linux_binprm *);
83 extern int __must_check remove_arg_zero(struct linux_binprm *);
84 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
85 extern int flush_old_exec(struct linux_binprm * bprm);
87 extern int suid_dumpable;
88 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
89 #define SUID_DUMP_USER 1 /* Dump as user of process */
90 #define SUID_DUMP_ROOT 2 /* Dump as root */
92 /* Stack area protections */
93 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
94 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
95 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
97 extern int setup_arg_pages(struct linux_binprm * bprm,
98 unsigned long stack_top,
99 int executable_stack);
100 extern int bprm_mm_init(struct linux_binprm *bprm);
101 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
102 extern void compute_creds(struct linux_binprm *binprm);
103 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
104 extern int set_binfmt(struct linux_binfmt *new);
105 extern void free_bprm(struct linux_binprm *);
107 #endif /* __KERNEL__ */
108 #endif /* _LINUX_BINFMTS_H */