1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* user-mmap.h: prototypes for linux-user guest binary loader
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LINUX_USER_USER_MMAP_H
#define LINUX_USER_USER_MMAP_H
/*
* Guest parameters for the ADDR_COMPAT_LAYOUT personality
* (at present this is the only layout supported by QEMU).
*
* TASK_UNMAPPED_BASE: For mmap without hint (addr != 0), the search
* for unused virtual memory begins at TASK_UNMAPPED_BASE.
*
* ELF_ET_DYN_BASE: When the executable is ET_DYN (i.e. PIE), and requires
* an interpreter (i.e. not -static-pie), use ELF_ET_DYN_BASE instead of
* TASK_UNMAPPED_BASE for selecting the address of the executable.
* This provides some distance between the executable and the interpreter,
* which allows the initial brk to be placed immediately after the
* executable and also have room to grow.
*
* task_unmapped_base, elf_et_dyn_base: When the guest address space is
* limited via -R, the values of TASK_UNMAPPED_BASE and ELF_ET_DYN_BASE
* must be adjusted to fit.
*/
extern abi_ulong task_unmapped_base;
extern abi_ulong elf_et_dyn_base;
/*
* mmap_next_start: The base address for the next mmap without hint,
* increased after each successful map, starting at task_unmapped_base.
* This is an optimization within QEMU and not part of ADDR_COMPAT_LAYOUT.
*/
extern abi_ulong mmap_next_start;
int target_mprotect(abi_ulong start, abi_ulong len, int prot);
abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
int flags, int fd, off_t offset);
int target_munmap(abi_ulong start, abi_ulong len);
abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
abi_ulong new_size, unsigned long flags,
abi_ulong new_addr);
abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice);
abi_ulong mmap_find_vma(abi_ulong, abi_ulong, abi_ulong);
void mmap_fork_start(void);
void mmap_fork_end(int child);
#endif /* LINUX_USER_USER_MMAP_H */
|
