25 lines
1.0 KiB
Plaintext
25 lines
1.0 KiB
Plaintext
mmap
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====
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:title: Shellcode Compiler Runtime
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---------------------------------------------
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void* mmap(void* addr, size_t len, int prot, int flags, int fd, uint64_t offset);
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---------------------------------------------
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Maps a block of memory of `len` bytes with page protection `prot`. If `addr` is `NULL`, the system
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automatically picks a free virtual address. If `addr` is not `NULL`, the provided address is mapped
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(existing mappings will be overridden).
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The protection flags in `prot` can include one or more of `PROT_READ`, `PROT_WRITE`, and `PROT_EXEC`.
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The `flags` parameter must contain one of `MAP_SHARED` or `MAP_PRIVATE`. Additional flags include
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`MAP_ANONYMOUS`, which maps a region backed by RAM instead of a file. The `fd` parameter should be
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`-1` when mapping anonymous pages. If the region is to be backed by a file, the `fd` and `offset`
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parameters specify the file handle and offset within the file of the beginning of the mapping.
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Returns a pointer to the mapped region.
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See also
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--------
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link:munmap.html[munmap]
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