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
20 #define CORENAME_MAX_SIZE 128
23 * This structure is used to hold the arguments that are used when loading binaries.
26 char buf[BINPRM_BUF_SIZE];
27 struct page *page[MAX_ARG_PAGES];
29 unsigned long p; /* current top of mem */
33 kernel_cap_t cap_inheritable, cap_permitted, cap_effective;
36 char * filename; /* Name of binary as seen by procps */
37 char * interp; /* Name of the binary really executed. Most
38 of the time same as filename, but could be
39 different for binfmt_{misc,script} */
40 unsigned interp_flags;
42 unsigned long loader, exec;
43 unsigned long argv_len;
46 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
47 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
49 /* fd of the binary should be passed to the interpreter */
50 #define BINPRM_FLAGS_EXECFD_BIT 1
51 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
55 * This structure defines the functions that are used to load the binary formats that
59 struct linux_binfmt * next;
60 struct module *module;
61 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
62 int (*load_shlib)(struct file *);
63 int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
64 unsigned long min_coredump; /* minimal dump size */
68 extern int register_binfmt(struct linux_binfmt *);
69 extern int unregister_binfmt(struct linux_binfmt *);
71 extern int prepare_binprm(struct linux_binprm *);
72 extern void remove_arg_zero(struct linux_binprm *);
73 extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
74 extern int flush_old_exec(struct linux_binprm * bprm);
76 extern int suid_dumpable;
77 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
78 #define SUID_DUMP_USER 1 /* Dump as user of process */
79 #define SUID_DUMP_ROOT 2 /* Dump as root */
81 /* Stack area protections */
82 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
83 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
84 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
86 extern int setup_arg_pages(struct linux_binprm * bprm,
87 unsigned long stack_top,
88 int executable_stack);
89 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
90 extern void compute_creds(struct linux_binprm *binprm);
91 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
92 extern int set_binfmt(struct linux_binfmt *new);
94 #endif /* __KERNEL__ */
95 #endif /* _LINUX_BINFMTS_H */