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diff --git a/libc-bottom-half/README.md b/libc-bottom-half/README.md new file mode 100644 index 0000000..1e5401c --- /dev/null +++ b/libc-bottom-half/README.md @@ -0,0 +1,19 @@ +# WASI libc "bottom half". + +The WASI libc "bottom half" is conceptually the lower half of a traditional libc +implementation, consisting of C interfaces to the low-level WASI syscalls. + +This implementation is partially derived from the "bottom half" of [cloudlibc], +revision 8835639f27fc42d32096d59d294a0bbb857dc368. + +[cloudlibc]: https://github.com/NuxiNL/cloudlibc + +This implementation includes preopen functionality, which emulates POSIX APIs +accepting absolute paths by translating them into pre-opened directory handles +and relative paths that can be opened with `openat`. This technique is inspired +by [libpreopen], however the implementation here is designed to be built into +libc rather than to be a layer on top of libc. + +[libpreopen]: https://github.com/musec/libpreopen + +The WASI libc lower half currently depends on the dlmalloc component. |