From 5d53df836e55ccd039ef11dc267c2387808cb0cc Mon Sep 17 00:00:00 2001
From: jD91mZM2 <me@krake.one>
Date: Sat, 15 Aug 2020 17:31:23 +0200
Subject: [PATCH] Remove brk

---
 src/call.rs   | 14 --------------
 src/number.rs |  1 -
 src/tests.rs  |  9 ---------
 3 files changed, 24 deletions(-)

diff --git a/src/call.rs b/src/call.rs
index e4423aa..cde2833 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -12,20 +12,6 @@ extern "C" fn restorer() -> ! {
     unreachable!();
 }
 
-/// Set the end of the process's heap
-///
-/// When `addr` is `0`, this function will return the current break.
-///
-/// When `addr` is nonzero, this function will attempt to set the end of the process's
-/// heap to `addr` and return the new program break. The new program break should be
-/// checked by the allocator, it may not be exactly `addr`, as it may be aligned to a page
-/// boundary.
-///
-/// On error, `Err(ENOMEM)` will be returned indicating that no memory is available
-pub unsafe fn brk(addr: usize) -> Result<usize> {
-    syscall1(SYS_BRK, addr)
-}
-
 /// Change the process's working directory
 ///
 /// This function will attempt to set the process's working directory to `path`, which can be
diff --git a/src/number.rs b/src/number.rs
index cc50580..1f037eb 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -39,7 +39,6 @@ pub const SYS_FSYNC: usize =      SYS_CLASS_FILE | 118;
 pub const SYS_FTRUNCATE: usize =  SYS_CLASS_FILE | 93;
 pub const SYS_FUTIMENS: usize =   SYS_CLASS_FILE | SYS_ARG_SLICE | 320;
 
-pub const SYS_BRK: usize =      45;
 pub const SYS_CHDIR: usize =    12;
 pub const SYS_CLOCK_GETTIME: usize = 265;
 pub const SYS_CLONE: usize =    120;
diff --git a/src/tests.rs b/src/tests.rs
index 7f87a2b..49a5f1b 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,12 +1,3 @@
-#[test]
-fn brk() {
-    unsafe {
-        let start = dbg!(crate::brk(0)).unwrap();
-        let end = start + 4 * 1024 * 1024;
-        assert_eq!(dbg!(crate::brk(end)), Ok(end));
-    }
-}
-
 #[test]
 fn chdir() {
     use std::str;