Support building for Redox

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "ralloc"]
 	path = ralloc
 	url = https://github.com/redox-os/ralloc.git
+[submodule "va_list"]
+	path = va_list
+	url = https://github.com/redox-os/va_list-rs.git

Cargo.lock

@@ -97,6 +97,11 @@ name = "fuchsia-zircon-sys"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "gcc"
+version = "0.3.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "grp"
 version = "0.1.0"
@@ -177,6 +182,7 @@ dependencies = [
 name = "platform"
 version = "0.1.0"
 dependencies = [
+ "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "syscall 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -197,6 +203,7 @@ dependencies = [
 name = "ralloc_shim"
 version = "0.1.1"
 dependencies = [
+ "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "sc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -411,7 +418,7 @@ version = "0.1.0"
 dependencies = [
  "cbindgen 0.5.0",
  "platform 0.1.0",
- "va_list 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "va_list 0.1.0",
 ]
 
 [[package]]
@@ -534,7 +541,16 @@ dependencies = [
 [[package]]
 name = "va_list"
 version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "va_list-helper 0.0.2",
+]
+
+[[package]]
+name = "va_list-helper"
+version = "0.0.2"
+dependencies = [
+ "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "vec_map"
@@ -580,6 +596,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "09c3753c3db574d215cba4ea76018483895d7bff25a31b49ba45db21c48e50ab"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
+"checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
 "checksum itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8324a32baf01e2ae060e9de58ed0bc2320c9a2833491ee36cd3b4c414de4db8c"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)" = "56aebce561378d99a0bb578f8cb15b6114d2a1814a6c7949bbe646d968bb4fa9"
@@ -624,7 +641,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
 "checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-"checksum va_list 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7365862faee55ed0dbc112491aa5f0451ca01bf98afcc6463183b5aaa5bd3128"
 "checksum vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "887b5b631c2ad01628bbbaa7dd4c869f80d3186688f8d0b6f58774fbe324988c"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "04e3bd221fcbe8a271359c04f21a76db7d0c6028862d1bb5512d85e1e2eb5bb3"

platform/Cargo.toml

@@ -3,5 +3,8 @@ name = "platform"
 version = "0.1.0"
 authors = ["Jeremy Soller <jackpot51@gmail.com>"]
 
-[dependencies]
+[target.'cfg(target_os = "linux")'.dependencies]
 syscall = "0.2"
+
+[target.'cfg(target_os = "redox")'.dependencies]
+redox_syscall = "0.1"

platform/src/lib.rs

@@ -20,7 +20,22 @@ pub mod types;
 
 use core::fmt;
 
-use types::c_int;
+use types::*;
+
+pub unsafe fn c_str(s: *const c_char) -> &'static [u8] {
+    use core::slice;
+
+    let mut size = 0;
+
+    loop {
+        if *s.offset(size) == 0 {
+            break;
+        }
+        size += 1;
+    }
+
+    slice::from_raw_parts(s as *const u8, size as usize)
+}
 
 pub struct FileWriter(pub c_int);
 

platform/src/redox/mod.rs

@@ -1,8 +1,24 @@
+use syscall;
+
+use c_str;
+use types::*;
+
+pub fn close(fd: c_int) -> c_int {
+    syscall::close(fd as usize);
+    0
+}
+
 pub fn exit(status: c_int) -> ! {
-    syscall::exit(status);
+    syscall::exit(status as usize);
+    loop {}
+}
+
+pub fn open(path: *const c_char, oflag: c_int, mode: mode_t) -> c_int {
+    let path = unsafe { c_str(path) };
+    syscall::open(path, (oflag as usize) | (mode as usize)).unwrap() as c_int
 }
 
 pub fn write(fd: c_int, buf: &[u8]) -> ssize_t {
-    syscall::write(fd, buf);
+    syscall::write(fd as usize, buf);
     buf.len() as ssize_t
 }

src/stdio/Cargo.toml

@@ -9,4 +9,4 @@ cbindgen = { path = "../../cbindgen" }
 
 [dependencies]
 platform = { path = "../../platform" }
-va_list = { version = "0.1", features = ["no_std"] }
+va_list = { path = "../../va_list", features = ["no_std"] }

src/string/src/lib.rs

@@ -104,16 +104,7 @@ pub extern "C" fn strerror(errnum: c_int) -> *mut c_char {
 
 #[no_mangle]
 pub unsafe extern "C" fn strlen(s: *const c_char) -> size_t {
-    let mut size = 0;
-
-    loop {
-        if *s.offset(size) == 0 {
-            break;
-        }
-        size += 1;
-    }
-
-    size as size_t
+    platform::c_str(s).len() as size_t
 }
 
 #[no_mangle]