1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3
4 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
5 * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
6 */
7
8 #ifndef __STUB_DATA_H
9 #define __STUB_DATA_H
10
11 #include <linux/compiler_types.h>
12 #include <as-layout.h>
13 #include <sysdep/tls.h>
14
15 #define STUB_NEXT_SYSCALL(s) \
16 ((struct stub_syscall *) (((unsigned long) s) + (s)->cmd_len))
17
18 enum stub_syscall_type {
19 STUB_SYSCALL_UNSET = 0,
20 STUB_SYSCALL_MMAP,
21 STUB_SYSCALL_MUNMAP,
22 STUB_SYSCALL_MPROTECT,
23 };
24
25 struct stub_syscall {
26 struct {
27 unsigned long addr;
28 unsigned long length;
29 unsigned long offset;
30 int fd;
31 int prot;
32 } mem;
33
34 enum stub_syscall_type syscall;
35 };
36
37 struct stub_data {
38 unsigned long offset;
39 long err, child_err;
40
41 int syscall_data_len;
42 /* 128 leaves enough room for additional fields in the struct */
43 struct stub_syscall syscall_data[(UM_KERN_PAGE_SIZE - 128) / sizeof(struct stub_syscall)] __aligned(16);
44
45 /* Stack for our signal handlers and for calling into . */
46 unsigned char sigstack[UM_KERN_PAGE_SIZE] __aligned(UM_KERN_PAGE_SIZE);
47 };
48
49 #endif
50
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