1 #ifndef _LINUX_BINFMTS_H
2 #define _LINUX_BINFMTS_H
4 #include <linux/capability.h>
9 * MAX_ARG_PAGES defines the number of pages allocated for arguments
10 * and envelope for the new program. 32 should suffice, this gives
11 * a maximum env+arg of 128kB w/4KB pages!
13 #define MAX_ARG_PAGES 32
15 /* sizeof(linux_binprm->buf) */
16 #define BINPRM_BUF_SIZE 128
21 * This structure is used to hold the arguments that are used when loading binaries.
24 char buf[BINPRM_BUF_SIZE];
25 struct page *page[MAX_ARG_PAGES];
27 unsigned long p; /* current top of mem */
31 kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
34 char * filename; /* Name of binary as seen by procps */
35 char * interp; /* Name of the binary really executed. Most
36 of the time same as filename, but could be
37 different for binfmt_{misc,script} */
38 unsigned interp_flags;
40 unsigned long loader, exec;
43 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
44 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
46 /* fd of the binary should be passed to the interpreter */
47 #define BINPRM_FLAGS_EXECFD_BIT 1
48 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
52 * This structure defines the functions that are used to load the binary formats that
56 struct linux_binfmt * next;
57 struct module *module;
58 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
59 int (*load_shlib)(struct file *);
60 int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
61 unsigned long min_coredump; /* minimal dump size */
64 extern int register_binfmt(struct linux_binfmt *);
65 extern int unregister_binfmt(struct linux_binfmt *);
67 extern int prepare_binprm(struct linux_binprm *);
68 extern void remove_arg_zero(struct linux_binprm *);
69 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
70 extern int flush_old_exec(struct linux_binprm * bprm);
72 extern int suid_dumpable;
73 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
74 #define SUID_DUMP_USER 1 /* Dump as user of process */
75 #define SUID_DUMP_ROOT 2 /* Dump as root */
77 /* Stack area protections */
78 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
79 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
80 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
82 extern int setup_arg_pages(struct linux_binprm * bprm,
83 unsigned long stack_top,
84 int executable_stack);
85 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
86 extern void compute_creds(struct linux_binprm *binprm);
87 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
88 extern int set_binfmt(struct linux_binfmt *new);
90 #endif /* __KERNEL__ */
91 #endif /* _LINUX_BINFMTS_H */