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Ensure that the chosen values for mmap_next_start and task_unmapped_base are within the guest address space. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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* user-mmap.h: prototypes for linux-user guest binary loader
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LINUX_USER_USER_MMAP_H
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#define LINUX_USER_USER_MMAP_H
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#if HOST_LONG_BITS == 64 && TARGET_ABI_BITS == 64
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#ifdef TARGET_AARCH64
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# define TASK_UNMAPPED_BASE 0x5500000000
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#else
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# define TASK_UNMAPPED_BASE (1ul << 38)
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#endif
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#else
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#ifdef TARGET_HPPA
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# define TASK_UNMAPPED_BASE 0xfa000000
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#else
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# define TASK_UNMAPPED_BASE 0x40000000
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#endif
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#endif
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/*
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* Guest parameters for the ADDR_COMPAT_LAYOUT personality
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* (at present this is the only layout supported by QEMU).
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*
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* TASK_UNMAPPED_BASE: For mmap without hint (addr != 0), the search
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* for unused virtual memory begins at TASK_UNMAPPED_BASE.
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*
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* task_unmapped_base: When the guest address space is limited via -R,
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* the value of TASK_UNMAPPED_BASE is adjusted to fit.
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*/
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extern abi_ulong task_unmapped_base;
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/*
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* mmap_next_start: The base address for the next mmap without hint,
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* increased after each successful map, starting at task_unmapped_base.
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* This is an optimization within QEMU and not part of ADDR_COMPAT_LAYOUT.
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*/
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extern abi_ulong mmap_next_start;
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int target_mprotect(abi_ulong start, abi_ulong len, int prot);
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abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
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int flags, int fd, off_t offset);
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int target_munmap(abi_ulong start, abi_ulong len);
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abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
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abi_ulong new_size, unsigned long flags,
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abi_ulong new_addr);
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abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice);
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abi_ulong mmap_find_vma(abi_ulong, abi_ulong, abi_ulong);
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void mmap_fork_start(void);
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void mmap_fork_end(int child);
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#endif /* LINUX_USER_USER_MMAP_H */
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