.editorconfig

+[**.c]
+indent_size = 4
+indent_style = space
+
+[**.yml]
+indent_size = 4
+indent_style = space

.gitignore

-/target/
+.idea/
+prefix/
+sysroot/
+**/target/
+.gdb_history
+*.patch
+*.swp
+*.swo
+/.vim

.gitlab-ci.yml

+image: "redoxos/redoxer:latest"
+
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
+
+stages:
+    - build
+    - test
+before_script:
+    cargo install cbindgen
+
+default:
+    cache:
+        paths:
+            - target/
+
+build:linux:
+    stage: build
+    script:
+        - rustup show # Ensure correct toolchain is downloaded and installed
+        - make -j "$(nproc)" all
+
+build:redox:
+    stage: build
+    variables:
+        TARGET: x86_64-unknown-redox
+    script:
+        - ./redoxer.sh -j "$(nproc)" all
+
+test:linux:
+    stage: test
+    needs:
+        - build:linux
+    dependencies:
+        - build:linux
+    script:
+        - make test
+
+#TODO: fix redoxer exec hangs
+# test:redox:
+#     stage: test
+#     needs:
+#         - build:redox
+#     dependencies:
+#         - build:redox
+#     variables:
+#         TARGET: x86_64-unknown-redox
+#     script:
+#         - ./redoxer.sh test
+#     # TODO: Out of memory
+#     allow_failure: true
+
+fmt:
+    stage: test
+    needs: []
+    script:
+        - rustup component add rustfmt-preview
+        - ./fmt.sh -- --check

.gitmodules

 [submodule "openlibm"]
 	path = openlibm
-	url = https://github.com/redox-os/openlibm.git
-[submodule "cbindgen"]
-	path = cbindgen
-	url = https://github.com/redox-os/cbindgen.git
+	url = https://github.com/JuliaMath/openlibm.git
+	branch = master
+[submodule "posix-regex"]
+	path = posix-regex
+	url = https://gitlab.redox-os.org/redox-os/posix-regex.git
+[submodule "compiler-builtins"]
+	path = compiler-builtins
+	url = https://gitlab.redox-os.org/redox-os/compiler-builtins.git
+	branch = relibc_fix_dup_symbols
+[submodule "src/dlmalloc-rs"]
+	path = dlmalloc-rs
+	url = https://gitlab.redox-os.org/redox-os/dlmalloc-rs.git

.vscode/settings.json

+{
+    "cmake.ignoreCMakeListsMissing": true
+}
\ No newline at end of file

CONTRIBUTING.md

+# Contributing
+
+## Table of contents
+1. [What to do](#what-to-do)
+2. [Code style](#code-style)
+3. [Sending merge requests](#sending-merge-requests)
+4. [Writing tests](#writing-tests)
+5. [Running tests](#running-tests)
+
+Maintaining a libc is tough work, and we'd love some help!
+
+## What to do
+
+For now, we are still trying to get full libc compatibility before we move on to
+any optimisation.
+
+- We currently have a number of unimplemented functions. Search for 
+    `unimplemented!()` and hop right in!
+- If you notice any missing functionality, feel free to add it in
+
+## Code style
+
+We have a `rustfmt.toml` in the root directory of relibc. Please run `./fmt.sh`
+before sending in any merge requests as it will automatically format your code.
+
+With regards to general style:
+
+### Where applicable, prefer using references to raw pointers
+
+This is most obvious when looking at `stdio` functions. If raw pointers were
+used instead of references, then the resulting code would be significantly
+uglier. Instead try to check for pointer being valid with `pointer::as_ref()`
+and `pointer::as_mut()` and then immediately use those references instead.
+
+Internal functions should always take references.
+
+### Use the c types exposed in our platform module instead of Rust's inbuilt integer types
+
+This is so we can guarantee that everything works across platforms. While it is
+generally accepted these days that an `int` has 32 bits (which matches against
+an `i32`), some platforms have `int` as having 16 bits, and others have long as
+being 32 bits instead of 64. If you use the types in platform, then we can
+guarantee that your code will "just work" should we port relibc to a different
+architecture.
+
+### Use our internal functions
+
+If you need to use a C string, don't reinvent the wheel. We have functions in
+the platform module that convert C strings to Rust slices.
+
+We also have structures that wrap files, wrap writable strings, and wrap various
+other commonly used things that you should use instead of rolling your own.
+
+## Sending merge requests
+
+If you have sent us a merge request, first of all, thanks for taking your time
+to help us!
+
+The first thing to note is that we do most of our development on our 
+[GitLab server](https://gitlab.redox-os.org/redox-os/relibc), and as such it is
+possible that none of the maintainers will see your merge request if it is
+opened on GitHub.
+
+In your merge request, please put in the description:
+- What functions (if any) have been implemented or changed
+- The rationale behind your merge request (e.g. why you thought this change was
+    required. If you are just implementing some functions, you can ignore this)
+- Any issues that are related to the merge request
+
+We have CI attached to our GitLab instance, so all merge requests are checked to
+make sure that they are tested before they are merged. Please write tests for
+the functions that you add/change and test locally on your own machine
+***before*** submitting a merge request.
+
+## Writing tests
+
+Every function that gets written needs to have a test in C in order to make sure
+it works as intended. Here are a few guidelines for writing good tests.
+
+### Ensure that any literals you have are mapped to variables instead of being directly passed to a function.
+
+Sometimes compilers take literals put into libc functions and run them 
+internally during compilation, which can cause some false positives.  All tests
+are compiled with `-fno-builtin`, which theoretically solves this issue, but
+just in case, it'd be a good idea to map inputs to variables.
+
+```c
+#include "string.h"
+#include "stdio.h"
+
+int main(void) {
+    // Don't do this
+    printf("%d\n", strcspn("Hello", "Hi"));
+
+    // Do this
+    char *first = "Hello";
+    char *second = "Hi";
+    printf("%d\n", strcspn(first, second));
+}
+```
+
+### Ensure your tests cover every section of code.
+
+What happens if a string in `strcmp()` is shorter than the other string? What 
+happens if the first argument to `strcspn()` is longer than the second string?  
+In order to make sure that all functions work as expected, we ask that any tests
+cover as much of the code that you have written as possible.
+
+## Running tests
+
+Running tests is an important part in trying to find bugs. Before opening a
+merge request, we ask that you test on your own machine to make sure there are
+no regressions.
+
+You can run tests with `make test` in the root directory of relibc to compile
+relibc, compile the tests and run them. This *will* print a lot of output to
+stdout, so be warned!
+
+You can test against verified correct output with `make verify` in the tests 
+directory. You will need to manually create the correct output and put it in the
+tests/expected directory. Running any `make` commands in the tests directory
+will ***not*** rebuild relibc, so you'll need to go back to the root directory
+if you need to rebuild relibc.

Cargo.toml

 [package]
 name = "relibc"
-version = "0.1.0"
+version = "0.2.5"
 authors = ["Jeremy Soller <jackpot51@gmail.com>"]
+edition = "2021"
 
 [lib]
-name = "c"
+name = "relibc"
 crate-type = ["staticlib"]
 
 [workspace]
-members = ["crt0"]
+members = [
+    "src/crt0",
+    "src/crti",
+    "src/crtn",
+    "redox-rt",
+    "ld_so",
+    "generic-rt",
+]
+exclude = ["tests", "dlmalloc-rs"]
+
+[build-dependencies]
+cc = "1"
 
 [dependencies]
-compiler_builtins = { git = "https://github.com/rust-lang-nursery/compiler-builtins.git", default-features = false, features = ["mem"] }
-platform = { path = "platform" }
-fcntl = { path = "fcntl" }
-string = { path = "string" }
-unistd = { path = "unistd" }
+bitflags = "2"
+cbitset = "0.2"
+posix-regex = { path = "posix-regex", features = ["no_std"] }
+
+# TODO: For some reason, rand_jitter hasn't been updated to use the latest rand_core
+rand = { version = "0.8", default-features = false, features = ["small_rng"] }
+rand_xorshift = "0.3"
+rand_jitter = "0.4"
+
+memchr = { version = "2.2.0", default-features = false }
+plain = "0.2"
+unicode-width = "0.1"
+__libc_only_for_layout_checks = { package = "libc", version = "0.2.149", optional = true }
+md5-crypto = { package = "md-5", version = "0.10.6", default-features = false }
+sha-crypt = { version = "0.5", default-features = false }
+base64ct = { version = "1.6", default-features = false, features = ["alloc"] }
+bcrypt-pbkdf = { version = "0.10", default-features = false, features = [
+    "alloc",
+] }
+scrypt = { version = "0.11", default-features = false, features = ["simple"] }
+pbkdf2 = { version = "0.12", features = ["sha2"] }
+sha2 = { version = "0.10", default-features = false }
+generic-rt = { path = "generic-rt" }
+chrono-tz = {version = "0.10", default-features = false}
+chrono = {version = "0.4", default-features = false, features = ["alloc"]}
+libm = "0.2"
+object = { version = "0.36.7", git = "https://gitlab.redox-os.org/andypython/object", default-features = false, features = ["elf", "read_core"] }
+spin = "0.9.8"
+
+[dependencies.dlmalloc]
+path = "dlmalloc-rs"
+default-features = false
+features = ["c_api"]
+
+[target.'cfg(target_os = "linux")'.dependencies]
+sc = "0.2.3"
+
+[target.'cfg(target_os = "redox")'.dependencies]
+redox_syscall = "0.5.8"
+redox-rt = { path = "redox-rt" }
+redox-path = "0.2"
+redox_event = { git = "https://gitlab.redox-os.org/redox-os/event.git", default-features = false, features = [
+    "redox_syscall",
+] }
+
+[features]
+default = ["check_against_libc_crate"]
+trace = []
+check_against_libc_crate = ["__libc_only_for_layout_checks"]
 
 [profile.dev]
 panic = "abort"
 
 [profile.release]
 panic = "abort"
+
+[patch.crates-io]
+cc-11 = { git = "https://github.com/tea/cc-rs", branch = "riscv-abi-arch-fix", package = "cc" }

LICENSE

+MIT License
+
+Copyright (c) 2018 Redox OS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

+ifndef TARGET
+	export TARGET:=$(shell rustc -Z unstable-options --print target-spec-json | grep llvm-target | cut -d '"' -f4)
+endif
+
+CARGO?=cargo
+CARGO_TEST?=$(CARGO)
+CARGO_COMMON_FLAGS=-Z build-std=core,alloc,compiler_builtins
+CARGOFLAGS?=$(CARGO_COMMON_FLAGS)
+RUSTCFLAGS?=
+export OBJCOPY?=objcopy
+
+BUILD?=$(shell pwd)/target/$(TARGET)
+CARGOFLAGS+=--target=$(TARGET)
+
+TARGET_HEADERS?=$(BUILD)/include
+export CFLAGS=-I$(TARGET_HEADERS)
+
+PROFILE?=release
+
+HEADERS_UNPARSED=$(shell find src/header -mindepth 1 -maxdepth 1 -type d -not -name "_*" -printf "%f\n")
+HEADERS_DEPS=$(shell find src/header -type f \( -name "cbindgen.toml" -o -name "*.rs" \))
+#HEADERS=$(patsubst %,%.h,$(subst _,/,$(HEADERS_UNPARSED)))
+
+ifeq ($(TARGET),aarch64-unknown-linux-gnu)
+	export CC=aarch64-linux-gnu-gcc
+	export LD=aarch64-linux-gnu-ld
+	export AR=aarch64-linux-gnu-ar
+	export NM=aarch64-linux-gnu-nm
+	export OBJCOPY=aarch64-linux-gnu-objcopy
+	export CPPFLAGS=
+endif
+
+ifeq ($(TARGET),aarch64-unknown-redox)
+	export CC=aarch64-unknown-redox-gcc
+	export LD=aarch64-unknown-redox-ld
+	export AR=aarch64-unknown-redox-ar
+	export NM=aarch64-unknown-redox-nm
+	export OBJCOPY=aarch64-unknown-redox-objcopy
+	export CPPFLAGS=
+endif
+
+ifeq ($(TARGET),x86_64-unknown-linux-gnu)
+	export CC=x86_64-linux-gnu-gcc
+	export LD=x86_64-linux-gnu-ld
+	export AR=x86_64-linux-gnu-ar
+	export NM=x86_64-linux-gnu-nm
+	export OBJCOPY=objcopy
+	export CPPFLAGS=
+endif
+
+ifeq ($(TARGET),i686-unknown-redox)
+	export CC=i686-unknown-redox-gcc
+	export LD=i686-unknown-redox-ld
+	export AR=i686-unknown-redox-ar
+	export NM=i686-unknown-redox-nm
+	export OBJCOPY=i686-unknown-redox-objcopy
+	export CPPFLAGS=
+endif
+
+ifeq ($(TARGET),x86_64-unknown-redox)
+	export CC=x86_64-unknown-redox-gcc
+	export LD=x86_64-unknown-redox-ld
+	export AR=x86_64-unknown-redox-ar
+	export NM=x86_64-unknown-redox-nm
+	export OBJCOPY=x86_64-unknown-redox-objcopy
+	export CPPFLAGS=
+endif
+
+ifeq ($(TARGET),riscv64gc-unknown-redox)
+	export CC=riscv64-unknown-redox-gcc
+	export LD=riscv64-unknown-redox-ld
+	export AR=riscv64-unknown-redox-ar
+	export NM=riscv64-unknown-redox-nm
+	export OBJCOPY=riscv64-unknown-redox-objcopy
+	export CPPFLAGS=-march=rv64gc -mabi=lp64d
+endif
+
+SRC=\
+	Cargo.* \
+	$(shell find src -type f)
+
+BUILTINS_VERSION=0.1.70
+
+.PHONY: all clean fmt install install-libs install-headers install-tests libs headers submodules test
+
+all: | headers libs
+
+headers: $(HEADERS_DEPS)
+	rm -rf $(TARGET_HEADERS)
+	mkdir -pv $(TARGET_HEADERS)
+	cp -rv include/* $(TARGET_HEADERS)
+	cp -v "openlibm/include"/*.h $(TARGET_HEADERS)
+	cp -v "openlibm/src"/*.h $(TARGET_HEADERS)
+	set -e ; \
+	for header in $(HEADERS_UNPARSED); do \
+		echo "Header $$header"; \
+		if test -f "src/header/$$header/cbindgen.toml"; then \
+			out=`echo "$$header" | sed 's/_/\//g'`; \
+			out="$(TARGET_HEADERS)/$$out.h"; \
+			cat "src/header/$$header/cbindgen.toml" cbindgen.globdefs.toml \
+				 | cbindgen "src/header/$$header/mod.rs" --config=/dev/stdin --output "$$out"; \
+		fi \
+	done
+
+clean:
+	$(CARGO) clean
+	$(MAKE) -C tests clean
+	rm -rf sysroot
+
+check:
+	$(CARGO) check
+
+fmt:
+	./fmt.sh
+
+install-headers: headers libs
+	mkdir -pv "$(DESTDIR)/include"
+	cp -rv "$(TARGET_HEADERS)"/* "$(DESTDIR)/include"
+
+libs: \
+	$(BUILD)/$(PROFILE)/libc.a \
+	$(BUILD)/$(PROFILE)/libc.so \
+	$(BUILD)/$(PROFILE)/crt0.o \
+	$(BUILD)/$(PROFILE)/crti.o \
+	$(BUILD)/$(PROFILE)/crtn.o \
+	$(BUILD)/$(PROFILE)/ld_so
+
+install-libs: headers libs
+	mkdir -pv "$(DESTDIR)/lib"
+	cp -v "$(BUILD)/$(PROFILE)/libc.a" "$(DESTDIR)/lib"
+	cp -v "$(BUILD)/$(PROFILE)/libc.so" "$(DESTDIR)/lib"
+	ln -vnfs libc.so "$(DESTDIR)/lib/libc.so.6"
+	cp -v "$(BUILD)/$(PROFILE)/crt0.o" "$(DESTDIR)/lib"
+	ln -vnfs crt0.o "$(DESTDIR)/lib/crt1.o"
+	cp -v "$(BUILD)/$(PROFILE)/crti.o" "$(DESTDIR)/lib"
+	cp -v "$(BUILD)/$(PROFILE)/crtn.o" "$(DESTDIR)/lib"
+	cp -v "$(BUILD)/$(PROFILE)/ld_so" "$(DESTDIR)/lib/ld64.so.1"
+	cp -v "$(BUILD)/openlibm/libopenlibm.a" "$(DESTDIR)/lib/libm.a"
+	# Empty libraries for dl, pthread, and rt
+	$(AR) -rcs "$(DESTDIR)/lib/libdl.a"
+	$(AR) -rcs "$(DESTDIR)/lib/libpthread.a"
+	$(AR) -rcs "$(DESTDIR)/lib/librt.a"
+
+install-tests: tests
+	$(MAKE) -C tests
+	mkdir -p "$(DESTDIR)/bin/relibc-tests"
+	cp -vr tests/bins_static/* "$(DESTDIR)/bin/relibc-tests/"
+
+install: install-headers install-libs
+
+submodules:
+	git submodule sync
+	git submodule update --init --recursive
+
+sysroot:
+	rm -rf $@
+	rm -rf $@.partial
+	mkdir -p $@.partial
+	$(MAKE) install DESTDIR=$@.partial
+	mv $@.partial $@
+	touch $@
+
+test: sysroot
+	# TODO: Fix SIGILL when running cargo test
+	# $(CARGO_TEST) test
+	$(MAKE) -C tests run
+	$(MAKE) -C tests verify
+
+
+$(BUILD)/$(PROFILE)/libc.so: $(BUILD)/$(PROFILE)/librelibc.a $(BUILD)/openlibm/libopenlibm.a
+	$(CC) -nostdlib \
+		-shared \
+		-Wl,--gc-sections \
+		-Wl,-z,pack-relative-relocs \
+		-Wl,--sort-common \
+		-Wl,--allow-multiple-definition \
+		-Wl,--whole-archive $^ -Wl,--no-whole-archive \
+		-Wl,-soname,libc.so.6 \
+		-lgcc \
+		-o $@
+
+# Debug targets
+
+$(BUILD)/debug/libc.a: $(BUILD)/debug/librelibc.a $(BUILD)/openlibm/libopenlibm.a
+	echo "create $@" > "$@.mri"
+	for lib in $^; do\
+		echo "addlib $$lib" >> "$@.mri"; \
+	done
+	echo "save" >> "$@.mri"
+	echo "end" >> "$@.mri"
+	$(AR) -M < "$@.mri"
+
+$(BUILD)/debug/librelibc.a: $(SRC)
+	$(CARGO) rustc $(CARGOFLAGS) -- --emit link=$@ -g -C debug-assertions=no $(RUSTCFLAGS)
+	./renamesyms.sh "$@" "$(BUILD)/debug/deps/"
+	touch $@
+
+$(BUILD)/debug/crt0.o: $(SRC)
+	$(CARGO) rustc --manifest-path src/crt0/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/debug/crti.o: $(SRC)
+	$(CARGO) rustc --manifest-path src/crti/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/debug/crtn.o: $(SRC)
+	$(CARGO) rustc --manifest-path src/crtn/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/debug/ld_so.o: $(SRC)
+	$(CARGO) rustc --manifest-path ld_so/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort -g -C debug-assertions=no $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/debug/ld_so: $(BUILD)/debug/ld_so.o $(BUILD)/debug/crti.o $(BUILD)/debug/libc.a $(BUILD)/debug/crtn.o
+	$(LD) --no-relax -T ld_so/ld_script/$(TARGET).ld --allow-multiple-definition --gc-sections $^ -o $@
+
+# Release targets
+
+$(BUILD)/release/libc.a: $(BUILD)/release/librelibc.a $(BUILD)/openlibm/libopenlibm.a
+	echo "create $@" > "$@.mri"
+	for lib in $^; do\
+		echo "addlib $$lib" >> "$@.mri"; \
+	done
+	echo "save" >> "$@.mri"
+	echo "end" >> "$@.mri"
+	$(AR) -M < "$@.mri"
+
+$(BUILD)/release/librelibc.a: $(SRC)
+	$(CARGO) rustc --release $(CARGOFLAGS) -- --emit link=$@ $(RUSTCFLAGS)
+	# TODO: Better to only allow a certain whitelisted set of symbols? Perhaps
+	# use some cbindgen hook, specify them manually, or grep for #[no_mangle].
+	./renamesyms.sh "$@" "$(BUILD)/release/deps/"
+	touch $@
+
+$(BUILD)/release/crt0.o: $(SRC)
+	$(CARGO) rustc --release --manifest-path src/crt0/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/release/crti.o: $(SRC)
+	$(CARGO) rustc --release --manifest-path src/crti/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/release/crtn.o: $(SRC)
+	$(CARGO) rustc --release --manifest-path src/crtn/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/release/ld_so.o: $(SRC)
+	$(CARGO) rustc --release --manifest-path ld_so/Cargo.toml $(CARGOFLAGS) -- --emit obj=$@ -C panic=abort $(RUSTCFLAGS)
+	touch $@
+
+$(BUILD)/release/ld_so: $(BUILD)/release/ld_so.o $(BUILD)/release/crti.o $(BUILD)/release/libc.a $(BUILD)/release/crtn.o
+	$(LD) --no-relax -T ld_so/ld_script/$(TARGET).ld --allow-multiple-definition --gc-sections $^ -o $@
+
+# Other targets
+
+$(BUILD)/openlibm: openlibm
+	rm -rf $@ $@.partial
+	mkdir -p $(BUILD)
+	cp -r $< $@.partial
+	mv $@.partial $@
+	touch $@
+
+$(BUILD)/openlibm/libopenlibm.a: $(BUILD)/openlibm $(BUILD)/release/librelibc.a
+	$(MAKE) AR=$(AR) CC=$(CC) LD=$(LD) CPPFLAGS="$(CPPFLAGS) -fno-stack-protector -I$(shell pwd)/include -I$(TARGET_HEADERS)" -C $< libopenlibm.a
+	./renamesyms.sh "$@" "$(BUILD)/release/deps/"

README.md

+# Redox C Library (relibc)
+
+relibc is a portable POSIX C standard library written in Rust and is under heavy development.
+
+The motivation for this project is twofold: Reduce issues that the Redox developers were having with [newlib](https://sourceware.org/newlib/), and create a safer alternative to a C standard library written in C. It is mainly designed to be used under Redox, as an alternative to newlib, but it also supports Linux system calls via the [sc](https://crates.io/crates/sc) crate.
+
+Currently Redox and Linux are supported.
+
+## redox-rt
+
+redox-rt is our equivalent for [vDSO](https://en.wikipedia.org/wiki/VDSO) from Linux.
+
+## Repository Layout
+
+- `include` - Header files (mostly macros and variadic functions `cbindgen` can't generate)
+- `src` - Source files
+- `src/c` - C code
+- `src/crt0` - Runtime code
+- `src/crti` - Runtime code
+- `src/crtn` - Runtime code
+- `src/header` - Header files implementation
+- `src/header/*` - Each folder has a `cbindgen.toml` file, it generates a C-to-Rust interface and header files
+- `src/ld_so` - Dynamic loader code
+- `src/platform` - Platform-specific and common code
+- `src/platform/redox` - Redox-specific code
+- `src/platform/linux` - Linux-specific code
+- `src/pthread` - pthread implementation
+- `src/sync` - Synchronization primitives
+- `tests` - C tests (each MR needs to give success in all of them)
+
+## Download the sources
+
+To download the relibc sources run the following command:
+
+```sh
+git clone --recursive https://gitlab.redox-os.org/redox-os/relibc
+```
+
+## Build Instructions
+
+To build relibc out of the Redox build system, do the following steps:
+
+### Dependencies
+
+- Install `cbindgen`
+
+```sh
+cargo install cbindgen
+```
+
+#### Install the `expect` tool
+
+- Debian, Ubuntu and PopOS:
+
+```sh
+sudo apt install expect
+```
+
+- Fedora:
+
+```sh
+sudo dnf install expect
+```
+
+- Arch Linux:
+
+```sh
+sudo pacman -S expect
+```
+
+### Build Relibc
+
+To build the relibc library objects, run the following command:
+
+```sh
+make all
+```
+
+- Clean old library objects and tests
+
+```sh
+make clean
+```
+
+## Build relibc inside the Redox build system
+
+Inside of your Redox build system, run:
+
+```sh
+make prefix
+```
+
+If you need to rebuild `relibc` for testing a Cookbook recipe, run:
+
+```sh
+touch relibc
+make prefix r.recipe-name
+```
+
+Touching (changing the "last modified time" of) the `relibc` folder is needed to trigger recompilation for `make prefix`. Replace `recipe-name` with your desired recipe name.
+
+Note: Do not edit `relibc` inside `prefix` folder! Do your work on `relibc` folder directly inside your Redox build system instead.
+
+## Tests
+
+This section explain how to build and run the tests.
+
+### Build
+
+To build the tests run `make all` on the `tests` folder, it will store the executables at `tests/bins_static`
+
+If you did changes to your tests, run `make clean all` to rebuild the executables.
+
+### Redox OS Testing
+
+To test on Redox do the following steps:
+
+- Add the `relibc-tests` recipe on your filesystem configuration at `config/your-cpu/your-config.toml` (generally `desktop.toml`)
+- Run the following commands to rebuild relibc with your changes, update the `relibc-tests` recipe and update your QEMU image:
+
+```sh
+touch relibc
+```
+
+```sh
+make prefix cr.relibc-tests image
+```
+
+- Run the tests
+
+```sh
+/usr/share/relibc-tests/bins_static/test-name
+```
+
+### Linux Testing
+
+Run `make test` on the relibc directory.
+
+If you want to run one test, run the following command:
+
+```sh
+tests/bins_static/test-name
+```
+
+## Issues
+
+#### I'm building for my own platform which I run, and am getting `x86_64-linux-gnu-ar: command not found` (or similar)
+
+The Makefile expects GNU compiler tools prefixed with the platform specifier, as would be present when you installed a cross compiler. Since you are building for your own platform, some Linux distributions (like Manjaro) don't install/symlink the prefixed executables.
+
+An easy fix would be to replace the corresponding lines in the Makefile, e.g.
+
+```diff
+ ifeq ($(TARGET),x86_64-unknown-linux-gnu)
+        export CC=x86_64-linux-gnu-gcc
+-       export LD=x86_64-linux-gnu-ld
+-       export AR=x86_64-linux-gnu-ar
++       export LD=ld
++       export AR=ar
+        export OBJCOPY=x86_64-linux-gnu-objcopy
+ endif
+```
+
+## Contributing
+
+Before starting to contribute, read [this](CONTRIBUTING.md) document.
+
+## Supported OSes
+
+- Redox OS
+- Linux
+
+## Supported architectures
+
+- i686 (Intel/AMD)
+- x86_64 (Intel/AMD)
+- Aarch64 (ARM64)

bindgen_transform.sh

+sed -i 's/::std::os::raw:://g' $1
+perl -i -p0e 's/extern "C" \{\n    pub fn/#[no_mangle]\npub extern "C" fn/g' $1 
+perl -i -p0e 's/;\n\}/ {\n    unimplemented!();\n\}\n/g' $1
+rustfmt $1

build.rs

+extern crate cc;
+
+use std::{env, fs};
+
+fn get_target() -> String {
+    env::var("TARGET").unwrap_or(
+        option_env!("TARGET").map_or("x86_64-unknown-redox".to_string(), |x| x.to_string()),
+    )
+}
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
+    let target = get_target();
+
+    println!("cargo:rerun-if-changed=src/c");
+
+    let mut cc_builder = &mut cc::Build::new();
+
+    cc_builder = cc_builder.flag("-nostdinc").flag("-nostdlib");
+
+    if target.starts_with("aarch64") {
+        cc_builder = cc_builder.flag("-mno-outline-atomics")
+    }
+
+    cc_builder
+        .flag("-fno-stack-protector")
+        .flag("-Wno-expansion-to-defined")
+        .files(
+            fs::read_dir("src/c")
+                .expect("src/c directory missing")
+                .map(|res| res.expect("read_dir error").path()),
+        )
+        .compile("relibc_c");
+
+    println!("cargo:rustc-link-lib=static=relibc_c");
+}

cbindgen @ 97ceb586

-Subproject commit 97ceb5862f397b14c5b63cd60af7f5f345ad065c

cbindgen.globdefs.toml

+
+# needs a leading newline
+[defines]
+"target_os=redox" = "__redox__"
+"target_os=linux" = "__linux__"
+"target_pointer_width=64" = "__LP64__"
+"target_pointer_width=32" = "__LP32__"
+"target_arch=x86" = "__i386__"
+"target_arch=x86_64" = "__x86_64__"
+"target_arch=aarch64" = "__aarch64__"
+# This is not exact. It should be `defined(__riscv) && defined(__LP64__)`, or `defined(__riscv) && __riscv_xlen==64`
+# This will do however, as long as we only support riscv64 and not riscv32
+"target_arch=riscv64" = "__riscv"
+
+# XXX: silences a warning
+"feature = no_std" = "__relibc__"
+
+# Ensure attributes are passed down from Rust
+# <features.h> must be included where attributes are used in relibc
+[fn]
+must_use = "__nodiscard"
+deprecated = "__deprecated"
+deprecated_with_note = "__deprecatedNote({})"
+no_return = "__noreturn"

ci.sh

+#!/bin/bash
+set -ex
+
+./fmt.sh -- --check
+if [ -z "$TARGET" ]
+then
+    make all
+    make test
+else
+    make libs
+fi

crt0/src/lib.rs

-//! crt0
-
-#![no_std]
-#![feature(asm)]
-#![feature(lang_items)]
-#![feature(naked_functions)]
-
-extern crate platform;
-
-use platform::types::*;
-
-#[no_mangle]
-#[naked]
-pub unsafe extern "C" fn _start() {
-    asm!("mov rdi, rsp
-        call _start_rust"
-        :
-        :
-        :
-        : "intel", "volatile"
-    );
-}
-
-#[repr(C)]
-pub struct Stack {
-    argc: isize,
-    argv0: *const u8,
-}
-
-impl Stack {
-    fn argc(&self) -> isize {
-        self.argc
-    }
-
-    fn argv(&self) -> *const *const u8 {
-        &self.argv0 as *const *const u8
-    }
-}
-
-#[inline(never)]
-#[no_mangle]
-pub unsafe extern "C" fn _start_rust(sp: &'static Stack) -> ! {
-    extern "C" {
-        fn main(argc: isize, argv: *const *const u8) -> c_int;
-    }
-
-    let argc = sp.argc();
-    let argv = sp.argv();
-
-    platform::exit(main(argc, argv));
-}
-
-#[lang = "panic_fmt"]
-pub extern "C" fn rust_begin_unwind(fmt: ::core::fmt::Arguments, file: &str, line: u32) -> ! {
-    loop {}
-}

dlmalloc-rs @ e4ba8493

+Subproject commit e4ba8493497c72e15f2b9d428e1dea17e26bf188

fcntl/Cargo.toml

-[package]
-name = "fcntl"
-version = "0.1.0"
-authors = ["Jeremy Soller <jackpot51@gmail.com>"]
-build = "build.rs"
-
-[build-dependencies]
-cbindgen = { path = "../cbindgen" }
-
-[dependencies]
-platform = { path = "../platform" }

fcntl/build.rs

-extern crate cbindgen;
-
-use std::{env, fs};
-
-fn main() {
-    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
-    fs::create_dir_all("../target/include").expect("failed to create include directory");
-    cbindgen::generate(crate_dir)
-      .expect("failed to generate bindings")
-      .write_to_file("../target/include/fcntl.h");
-}