1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_BINFMTS_H
3 #define _LINUX_BINFMTS_H
5 #include <linux/sched.h>
6 #include <linux/unistd.h>
8 #include <uapi/linux/binfmts.h>
12 #define CORENAME_MAX_SIZE 128
15 * This structure is used to hold the arguments that are used when loading binaries.
19 struct vm_area_struct *vma;
20 unsigned long vma_pages;
22 # define MAX_ARG_PAGES 32
23 struct page *page[MAX_ARG_PAGES];
26 unsigned long p; /* current top of mem */
27 unsigned long argmin; /* rlimit marker for copy_strings() */
30 * True if most recent call to cap_bprm_set_creds
31 * resulted in elevated privileges.
35 * Set by bprm_creds_for_exec hook to indicate a
36 * privilege-gaining exec has happened. Used to set
37 * AT_SECURE auxv for glibc.
41 * Set when errors can no longer be returned to the
48 unsigned int recursion_depth; /* only for search_binary_handler() */
50 struct cred *cred; /* new credentials */
51 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
52 unsigned int per_clear; /* bits to clear in current->personality */
54 const char * filename; /* Name of binary as seen by procps */
55 const char * interp; /* Name of the binary really executed. Most
56 of the time same as filename, but could be
57 different for binfmt_{misc,script} */
58 unsigned interp_flags;
60 unsigned long loader, exec;
62 struct rlimit rlim_stack; /* Saved RLIMIT_STACK used during exec. */
64 char buf[BINPRM_BUF_SIZE];
67 #define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
68 #define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
70 /* fd of the binary should be passed to the interpreter */
71 #define BINPRM_FLAGS_EXECFD_BIT 1
72 #define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
74 /* filename of the binary will be inaccessible after exec */
75 #define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2
76 #define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT)
78 /* Function parameter for binfmt->coredump */
79 struct coredump_params {
80 const kernel_siginfo_t *siginfo;
84 unsigned long mm_flags;
90 * This structure defines the functions that are used to load the binary formats that
95 struct module *module;
96 int (*load_binary)(struct linux_binprm *);
97 int (*load_shlib)(struct file *);
98 int (*core_dump)(struct coredump_params *cprm);
99 unsigned long min_coredump; /* minimal dump size */
100 } __randomize_layout;
102 extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
104 /* Registration of default binfmt handlers */
105 static inline void register_binfmt(struct linux_binfmt *fmt)
107 __register_binfmt(fmt, 0);
109 /* Same as above, but adds a new binfmt at the top of the list */
110 static inline void insert_binfmt(struct linux_binfmt *fmt)
112 __register_binfmt(fmt, 1);
115 extern void unregister_binfmt(struct linux_binfmt *);
117 extern int prepare_binprm(struct linux_binprm *);
118 extern int __must_check remove_arg_zero(struct linux_binprm *);
119 extern int search_binary_handler(struct linux_binprm *);
120 extern int begin_new_exec(struct linux_binprm * bprm);
121 extern void setup_new_exec(struct linux_binprm * bprm);
122 extern void finalize_exec(struct linux_binprm *bprm);
123 extern void would_dump(struct linux_binprm *, struct file *);
125 extern int suid_dumpable;
127 /* Stack area protections */
128 #define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
129 #define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
130 #define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
132 extern int setup_arg_pages(struct linux_binprm * bprm,
133 unsigned long stack_top,
134 int executable_stack);
135 extern int transfer_args_to_stack(struct linux_binprm *bprm,
136 unsigned long *sp_location);
137 extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
138 extern int copy_strings_kernel(int argc, const char *const *argv,
139 struct linux_binprm *bprm);
140 extern void set_binfmt(struct linux_binfmt *new);
141 extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
143 extern int do_execve(struct filename *,
144 const char __user * const __user *,
145 const char __user * const __user *);
146 extern int do_execveat(int, struct filename *,
147 const char __user * const __user *,
148 const char __user * const __user *,
150 int do_execve_file(struct file *file, void *__argv, void *__envp);
152 #endif /* _LINUX_BINFMTS_H */