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 */
40 kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
43 char * filename; /* Name of binary as seen by procps */
44 char * interp; /* Name of the binary really executed. Most
45 of the time same as filename, but could be
46 different for binfmt_{misc,script} */
47 unsigned interp_flags;
49 unsigned long loader, exec;
50 unsigned long argv_len;
53 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
54 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
56 /* fd of the binary should be passed to the interpreter */
57 #define BINPRM_FLAGS_EXECFD_BIT 1
58 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
62 * This structure defines the functions that are used to load the binary formats that
66 struct linux_binfmt * next;
67 struct module *module;
68 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
69 int (*load_shlib)(struct file *);
70 int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
71 unsigned long min_coredump; /* minimal dump size */
75 extern int register_binfmt(struct linux_binfmt *);
76 extern int unregister_binfmt(struct linux_binfmt *);
78 extern int prepare_binprm(struct linux_binprm *);
79 extern int __must_check remove_arg_zero(struct linux_binprm *);
80 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
81 extern int flush_old_exec(struct linux_binprm * bprm);
83 extern int suid_dumpable;
84 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
85 #define SUID_DUMP_USER 1 /* Dump as user of process */
86 #define SUID_DUMP_ROOT 2 /* Dump as root */
88 /* Stack area protections */
89 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
90 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
91 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
93 extern int setup_arg_pages(struct linux_binprm * bprm,
94 unsigned long stack_top,
95 int executable_stack);
96 extern int bprm_mm_init(struct linux_binprm *bprm);
97 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
98 extern void compute_creds(struct linux_binprm *binprm);
99 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
100 extern int set_binfmt(struct linux_binfmt *new);
102 #endif /* __KERNEL__ */
103 #endif /* _LINUX_BINFMTS_H */