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6ffed14b9c
Actually Portable Executable now supports Android. Cosmo's old mmap code required a 47 bit address space. The new implementation is very agnostic and supports both smaller address spaces (e.g. embedded) and even modern 56-bit PML5T paging for x86 which finally came true on Zen4 Threadripper Cosmopolitan no longer requires UNIX systems to observe the Windows 64kb granularity; i.e. sysconf(_SC_PAGE_SIZE) will now report the host native page size. This fixes a longstanding POSIX conformance issue, concerning file mappings that overlap the end of file. Other aspects of conformance have been improved too, such as the subtleties of address assignment and and the various subtleties surrounding MAP_FIXED and MAP_FIXED_NOREPLACE On Windows, mappings larger than 100 megabytes won't be broken down into thousands of independent 64kb mappings. Support for MAP_STACK is removed by this change; please use NewCosmoStack() instead. Stack overflow avoidance is now being implemented using the POSIX thread APIs. Please use GetStackBottom() and GetStackAddr(), instead of the old error-prone GetStackAddr() and HaveStackMemory() APIs which are removed.
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_RUNTIME_MAPS_H_
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#define COSMOPOLITAN_LIBC_RUNTIME_MAPS_H_
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/dll.h"
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#include "libc/thread/tls2.internal.h"
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COSMOPOLITAN_C_START_
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#define MAP_CONTAINER(e) DLL_CONTAINER(struct Map, elem, e)
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struct Map {
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_Atomic(struct Map *) next; /* for __maps.maps */
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char *addr; /* granule aligned */
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size_t size; /* must be nonzero */
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struct Dll elem; /* for __maps.free */
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int64_t off; /* -1 if anonymous */
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int prot; /* memory protects */
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int flags; /* memory map flag */
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bool iscow; /* windows nt only */
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bool readonlyfile; /* windows nt only */
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intptr_t h; /* windows nt only */
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};
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struct Maps {
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atomic_int lock;
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_Atomic(struct Map *) maps;
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struct Dll *free;
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struct Map stack;
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struct Dll *used;
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};
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struct AddrSize {
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char *addr;
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size_t size;
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};
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extern struct Maps __maps;
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int maps_check(void);
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void __maps_init(void);
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void __maps_lock(void);
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void __maps_unlock(void);
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struct Map *__maps_alloc(void);
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void __maps_free(struct Map *);
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void __maps_insert(struct Map *);
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void *__mmap(char *, size_t, int, int, int, int64_t);
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struct AddrSize __get_main_stack(void);
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_MAPS_H_ */
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