15423e6d3SPeter Maydell /* 25423e6d3SPeter Maydell * user-mmap.h: prototypes for linux-user guest binary loader 35423e6d3SPeter Maydell * 45423e6d3SPeter Maydell * This program is free software; you can redistribute it and/or modify 55423e6d3SPeter Maydell * it under the terms of the GNU General Public License as published by 65423e6d3SPeter Maydell * the Free Software Foundation; either version 2 of the License, or 75423e6d3SPeter Maydell * (at your option) any later version. 85423e6d3SPeter Maydell * 95423e6d3SPeter Maydell * This program is distributed in the hope that it will be useful, 105423e6d3SPeter Maydell * but WITHOUT ANY WARRANTY; without even the implied warranty of 115423e6d3SPeter Maydell * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 125423e6d3SPeter Maydell * GNU General Public License for more details. 135423e6d3SPeter Maydell * 145423e6d3SPeter Maydell * You should have received a copy of the GNU General Public License 155423e6d3SPeter Maydell * along with this program; if not, see <http://www.gnu.org/licenses/>. 165423e6d3SPeter Maydell */ 175423e6d3SPeter Maydell 185423e6d3SPeter Maydell #ifndef LINUX_USER_USER_MMAP_H 195423e6d3SPeter Maydell #define LINUX_USER_USER_MMAP_H 205423e6d3SPeter Maydell 21c8fb5cf9SRichard Henderson /* 22c8fb5cf9SRichard Henderson * Guest parameters for the ADDR_COMPAT_LAYOUT personality 23c8fb5cf9SRichard Henderson * (at present this is the only layout supported by QEMU). 24c8fb5cf9SRichard Henderson * 25c8fb5cf9SRichard Henderson * TASK_UNMAPPED_BASE: For mmap without hint (addr != 0), the search 26c8fb5cf9SRichard Henderson * for unused virtual memory begins at TASK_UNMAPPED_BASE. 27c8fb5cf9SRichard Henderson * 28da2b71faSRichard Henderson * ELF_ET_DYN_BASE: When the executable is ET_DYN (i.e. PIE), and requires 29da2b71faSRichard Henderson * an interpreter (i.e. not -static-pie), use ELF_ET_DYN_BASE instead of 30da2b71faSRichard Henderson * TASK_UNMAPPED_BASE for selecting the address of the executable. 31da2b71faSRichard Henderson * This provides some distance between the executable and the interpreter, 32da2b71faSRichard Henderson * which allows the initial brk to be placed immediately after the 33da2b71faSRichard Henderson * executable and also have room to grow. 34da2b71faSRichard Henderson * 35da2b71faSRichard Henderson * task_unmapped_base, elf_et_dyn_base: When the guest address space is 36da2b71faSRichard Henderson * limited via -R, the values of TASK_UNMAPPED_BASE and ELF_ET_DYN_BASE 37da2b71faSRichard Henderson * must be adjusted to fit. 38c8fb5cf9SRichard Henderson */ 39c8fb5cf9SRichard Henderson extern abi_ulong task_unmapped_base; 40da2b71faSRichard Henderson extern abi_ulong elf_et_dyn_base; 41c8fb5cf9SRichard Henderson 42c8fb5cf9SRichard Henderson /* 43c8fb5cf9SRichard Henderson * mmap_next_start: The base address for the next mmap without hint, 44c8fb5cf9SRichard Henderson * increased after each successful map, starting at task_unmapped_base. 45c8fb5cf9SRichard Henderson * This is an optimization within QEMU and not part of ADDR_COMPAT_LAYOUT. 46c8fb5cf9SRichard Henderson */ 47c8fb5cf9SRichard Henderson extern abi_ulong mmap_next_start; 48c8fb5cf9SRichard Henderson 495423e6d3SPeter Maydell int target_mprotect(abi_ulong start, abi_ulong len, int prot); 505423e6d3SPeter Maydell abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 5155baec0fSRichard Henderson int flags, int fd, off_t offset); 525423e6d3SPeter Maydell int target_munmap(abi_ulong start, abi_ulong len); 535423e6d3SPeter Maydell abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 545423e6d3SPeter Maydell abi_ulong new_size, unsigned long flags, 555423e6d3SPeter Maydell abi_ulong new_addr); 56892a4f6aSIlya Leoshkevich abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice); 575423e6d3SPeter Maydell abi_ulong mmap_find_vma(abi_ulong, abi_ulong, abi_ulong); 585423e6d3SPeter Maydell void mmap_fork_start(void); 595423e6d3SPeter Maydell void mmap_fork_end(int child); 605423e6d3SPeter Maydell 61225a206cSRichard Henderson abi_ulong target_shmat(CPUArchState *cpu_env, int shmid, 62225a206cSRichard Henderson abi_ulong shmaddr, int shmflg); 63225a206cSRichard Henderson abi_long target_shmdt(abi_ulong shmaddr); 64225a206cSRichard Henderson 655423e6d3SPeter Maydell #endif /* LINUX_USER_USER_MMAP_H */ 66