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