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1e854c18e5
Fix comments accordingly. This is in preparation for a change in open_shared, handling shared regions more cleanly. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
66 lines
2.8 KiB
C
66 lines
2.8 KiB
C
/* memory_layout.h: document all addresses crucial to the fixed memory
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layout of Cygwin processes.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* This is where Cygwin executables are loaded to, unless dynamicbase is
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enabled in the PE/COFF header of the executable file. */
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#define EXECUTABLE_ADDRESS 0x100400000UL
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/* Fixed address set by the linker. The Cygwin DLL will have this address set
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in the DOS header. Keep this area free with ASLR, for the case where
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dynamicbase is accidentally not set in the PE/COFF header of the DLL. */
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#define CYGWIN_DLL_ADDRESS 0x180040000UL
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/* Default addresses of required standard shared regions (Cygwin shared,
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user shared, myself, shared console). */
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#define CYGWIN_REGION_ADDRESS 0x1a0000000UL
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#define USER_REGION_ADDRESS 0x1a1000000UL
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#define MYSELF_REGION_ADDRESS 0x1a2000000UL
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#define SHARED_CONSOLE_REGION_ADDRESS 0x1a3000000UL
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/* Area for non-fixed-address Cygwin-specific shared memory regions. Fallback
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for standard shared regions if the can't load at their default address. */
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#define SHARED_REGIONS_ADDRESS_LOW 0x1a4000000UL
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#define SHARED_REGIONS_ADDRESS_HIGH 0x200000000UL
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/* Rebased DLLs are located in this 16 Gigs arena. Will be kept for
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backward compatibility. */
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#define REBASED_DLL_STORAGE_LOW 0x200000000UL
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#define REBASED_DLL_STORAGE_HIGH 0x400000000UL
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/* Auto-image-based DLLs are located in this 16 Gigs arena. This is used
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by the linker to set a default address for DLLs. */
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#define AUTOBASED_DLL_STORAGE_LOW 0x400000000UL
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#define AUTOBASED_DLL_STORAGE_HIGH 0x600000000UL
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/* Storage area for thread stacks. */
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#define THREAD_STORAGE_LOW 0x600000000UL
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#define THREAD_STORAGE_HIGH 0x800000000UL
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/* That's where the cygheap is located. CYGHEAP_STORAGE_INITIAL defines the
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end of the initially committed heap area. */
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#define CYGHEAP_STORAGE_LOW 0x800000000UL
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#define CYGHEAP_STORAGE_INITIAL 0x800300000UL
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#define CYGHEAP_STORAGE_HIGH 0xa00000000UL
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/* This is where the user heap starts. There's no defined end address.
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The user heap pontentially grows into the mmap arena. However,
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the user heap grows upwards and the mmap arena grows downwards,
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so there's not much chance to meet unluckily. */
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#define USERHEAP_START 0xa00000000UL
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/* The memory region used for memory maps. Mmaps grow downwards.
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Set the lowest address to leave ~32 Gigs for heap.
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Up to Win 8 we only have a 44 bit address space, 48 bit address space
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starting with 8.1, so the max value is a system-specific variable. */
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#define MMAP_STORAGE_LOW 0x001000000000UL
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#define __MMAP_STORAGE_HIGH_LEGACY 0x070000000000UL
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#define __MMAP_STORAGE_HIGH 0x700000000000UL
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#define MMAP_STORAGE_HIGH wincap.mmap_storage_high ()
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