Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_BINFMTS_H
2#define _LINUX_BINFMTS_H
3
4#include <linux/sched.h>
5#include <linux/unistd.h>
6#include <asm/exec.h>
7#include <uapi/linux/binfmts.h>
8
9#define CORENAME_MAX_SIZE 128
10
11/*
12 * This structure is used to hold the arguments that are used when loading binaries.
13 */
14struct linux_binprm {
15 char buf[BINPRM_BUF_SIZE];
16#ifdef CONFIG_MMU
17 struct vm_area_struct *vma;
18 unsigned long vma_pages;
19#else
20# define MAX_ARG_PAGES 32
21 struct page *page[MAX_ARG_PAGES];
22#endif
23 struct mm_struct *mm;
24 unsigned long p; /* current top of mem */
25 unsigned int
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 */
31#ifdef __alpha__
32 unsigned int taso:1;
33#endif
34 unsigned int recursion_depth;
35 struct file * file;
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 */
39 int argc, envc;
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;
45 unsigned interp_data;
46 unsigned long loader, exec;
47 char tcomm[TASK_COMM_LEN];
48};
49
50#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
51#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
52
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)
56
57#define BINPRM_MAX_RECURSION 4
58
59/* Function parameter for binfmt->coredump */
60struct coredump_params {
61 siginfo_t *siginfo;
62 struct pt_regs *regs;
63 struct file *file;
64 unsigned long limit;
65 unsigned long mm_flags;
66};
67
68/*
69 * This structure defines the functions that are used to load the binary formats that
70 * linux accepts.
71 */
72struct linux_binfmt {
73 struct list_head lh;
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 */
79};
80
81extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
82
83/* Registration of default binfmt handlers */
84static inline void register_binfmt(struct linux_binfmt *fmt)
85{
86 __register_binfmt(fmt, 0);
87}
88/* Same as above, but adds a new binfmt at the top of the list */
89static inline void insert_binfmt(struct linux_binfmt *fmt)
90{
91 __register_binfmt(fmt, 1);
92}
93
94extern void unregister_binfmt(struct linux_binfmt *);
95
96extern int prepare_binprm(struct linux_binprm *);
97extern int __must_check remove_arg_zero(struct linux_binprm *);
98extern int search_binary_handler(struct linux_binprm *, struct pt_regs *);
99extern int flush_old_exec(struct linux_binprm * bprm);
100extern void setup_new_exec(struct linux_binprm * bprm);
101extern void would_dump(struct linux_binprm *, struct file *);
102
103extern 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 */
107
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 */
112
113extern int setup_arg_pages(struct linux_binprm * bprm,
114 unsigned long stack_top,
115 int executable_stack);
116extern int bprm_mm_init(struct linux_binprm *bprm);
117extern int copy_strings_kernel(int argc, const char *const *argv,
118 struct linux_binprm *bprm);
119extern int prepare_bprm_creds(struct linux_binprm *bprm);
120extern void install_exec_creds(struct linux_binprm *bprm);
121extern void set_binfmt(struct linux_binfmt *new);
122extern void free_bprm(struct linux_binprm *);
123
124#ifdef __ARCH_WANT_KERNEL_EXECVE
125extern void ret_from_kernel_execve(struct pt_regs *normal) __noreturn;
126#endif
127
128#endif /* _LINUX_BINFMTS_H */