1 #ifndef _LINUX_BINFMTS_H
2 #define _LINUX_BINFMTS_H
4 #include <linux/sched.h>
5 #include <linux/unistd.h>
7 #include <uapi/linux/binfmts.h>
9 #define CORENAME_MAX_SIZE 128
12 * This structure is used to hold the arguments that are used when loading binaries.
15 char buf[BINPRM_BUF_SIZE];
17 struct vm_area_struct *vma;
18 unsigned long vma_pages;
20 # define MAX_ARG_PAGES 32
21 struct page *page[MAX_ARG_PAGES];
24 unsigned long p; /* current top of mem */
26 cred_prepared:1,/* true if creds already prepared (multiple
27 * preps happen for interpreters) */
28 cap_effective:1;/* true if has elevated effective capabilities,
29 * false if not; except for init which inherits
30 * its parent's caps anyway */
34 unsigned int recursion_depth;
36 struct cred *cred; /* new credentials */
37 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
38 unsigned int per_clear; /* bits to clear in current->personality */
40 const char * filename; /* Name of binary as seen by procps */
41 const char * interp; /* Name of the binary really executed. Most
42 of the time same as filename, but could be
43 different for binfmt_{misc,script} */
44 unsigned interp_flags;
46 unsigned long loader, exec;
47 char tcomm[TASK_COMM_LEN];
50 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
51 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
53 /* fd of the binary should be passed to the interpreter */
54 #define BINPRM_FLAGS_EXECFD_BIT 1
55 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
57 #define BINPRM_MAX_RECURSION 4
59 /* Function parameter for binfmt->coredump */
60 struct coredump_params {
65 unsigned long mm_flags;
69 * This structure defines the functions that are used to load the binary formats that
74 struct module *module;
75 int (*load_binary)(struct linux_binprm *, struct pt_regs * regs);
76 int (*load_shlib)(struct file *);
77 int (*core_dump)(struct coredump_params *cprm);
78 unsigned long min_coredump; /* minimal dump size */
81 extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
83 /* Registration of default binfmt handlers */
84 static inline void register_binfmt(struct linux_binfmt *fmt)
86 __register_binfmt(fmt, 0);
88 /* Same as above, but adds a new binfmt at the top of the list */
89 static inline void insert_binfmt(struct linux_binfmt *fmt)
91 __register_binfmt(fmt, 1);
94 extern void unregister_binfmt(struct linux_binfmt *);
96 extern int prepare_binprm(struct linux_binprm *);
97 extern int __must_check remove_arg_zero(struct linux_binprm *);
98 extern int search_binary_handler(struct linux_binprm *, struct pt_regs *);
99 extern int flush_old_exec(struct linux_binprm * bprm);
100 extern void setup_new_exec(struct linux_binprm * bprm);
101 extern void would_dump(struct linux_binprm *, struct file *);
103 extern int suid_dumpable;
104 #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
105 #define SUID_DUMP_USER 1 /* Dump as user of process */
106 #define SUID_DUMP_ROOT 2 /* Dump as root */
108 /* Stack area protections */
109 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
110 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
111 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
113 extern int setup_arg_pages(struct linux_binprm * bprm,
114 unsigned long stack_top,
115 int executable_stack);
116 extern int bprm_mm_init(struct linux_binprm *bprm);
117 extern int copy_strings_kernel(int argc, const char *const *argv,
118 struct linux_binprm *bprm);
119 extern int prepare_bprm_creds(struct linux_binprm *bprm);
120 extern void install_exec_creds(struct linux_binprm *bprm);
121 extern void set_binfmt(struct linux_binfmt *new);
122 extern void free_bprm(struct linux_binprm *);
124 #ifdef __ARCH_WANT_KERNEL_EXECVE
125 extern void ret_from_kernel_execve(struct pt_regs *normal) __noreturn;
128 #endif /* _LINUX_BINFMTS_H */