Lib: Added libm to emerald_std

This adds the missing functions `rust/std` require
that are normally available in `libc`

We will update `rust` as well to use these new functions.

We have modified `libm` in the PR: rust-lang/libm#290
to enable building `std`.

Author: Amjad50

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "emerald_std"
-version = "0.2.6"
+version = "0.2.7"
 edition = "2021"
 readme = "README.md"
 authors = ["Amjad Alsharafi"]
@@ -15,6 +15,8 @@ categories = ["os"]
 [dependencies]
 increasing_heap_allocator = { version="0.1.3", path = "../increasing_heap_allocator" }
 kernel_user_link = { version="0.2.4", path = "../kernel_user_link", package = "emerald_kernel_user_link" }
+# for now, waiting for the PR https://github.com/rust-lang/libm/pull/290 to be merged
+libm = { version = "0.2.8", git = "https://github.com/Amjad50/libm", branch = "compiling_libm_for_std" }
 
 core = { version = "1.0.0", optional = true, package = "rustc-std-workspace-core" }
 compiler_builtins = { version = "0.1.2", optional = true }
@@ -27,5 +29,6 @@ rustc-dep-of-std = [
     "alloc",
     "compiler_builtins/mem",
     "kernel_user_link/rustc-dep-of-std",
-    "increasing_heap_allocator/rustc-dep-of-std"
+    "increasing_heap_allocator/rustc-dep-of-std",
+    "libm/rustc-dep-of-std"
 ]

libraries/emerald_std/Cargo.toml

@@ -77,7 +77,7 @@ pub fn get_framebuffer_info() -> Result<FrameBufferInfo, SyscallError> {
     unsafe { Ok(info.assume_init()) }
 }
 
-pub fn blit(command: &BlitCommand) -> Result<(), SyscallError> {
+pub fn blit(command: &BlitCommand<'_>) -> Result<(), SyscallError> {
     if !command.is_buffer_valid() {
         return Err(SyscallError::InvalidGraphicsBuffer);
     }

libraries/emerald_std/src/graphics.rs

@@ -4,6 +4,7 @@ pub mod alloc;
 pub mod clock;
 pub mod graphics;
 pub mod io;
+pub mod math;
 pub mod process;
 mod sync;
 

libraries/emerald_std/src/lib.rs

@@ -0,0 +1,2 @@
+//! Re-export of the `libm` crate.
+pub use libm::*;