From fd6174a88db276b53c3856bf9865bdd43029e4c9 Mon Sep 17 00:00:00 2001
From: acheron <98934430+acheroncrypto@users.noreply.github.com>
Date: Thu, 11 Jul 2024 12:22:44 +0200
Subject: [PATCH] syn: Remove `bpf` target support in `hash` feature (#3078)

---
 CHANGELOG.md         |  2 ++
 lang/syn/src/hash.rs | 30 +++---------------------------
 2 files changed, 5 insertions(+), 27 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index db7f9585e..23d67e4a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,8 @@ The minor version will be incremented upon a breaking change and the patch versi
 
 ### Breaking
 
+- syn: Remove `bpf` target support in `hash` feature ([#3078](https://github.com/coral-xyz/anchor/pull/3078)).
+
 ## [0.30.1] - 2024-06-20
 
 ### Features
diff --git a/lang/syn/src/hash.rs b/lang/syn/src/hash.rs
index d6992dd50..60a5cfb47 100644
--- a/lang/syn/src/hash.rs
+++ b/lang/syn/src/hash.rs
@@ -78,11 +78,6 @@ impl Hash {
         Hash(<[u8; HASH_BYTES]>::try_from(hash_slice).unwrap())
     }
 
-    #[cfg(target_arch = "bpf")]
-    pub const fn new_from_array(hash_array: [u8; HASH_BYTES]) -> Self {
-        Self(hash_array)
-    }
-
     pub fn to_bytes(self) -> [u8; HASH_BYTES] {
         self.0
     }
@@ -92,28 +87,9 @@ impl Hash {
 pub fn hashv(vals: &[&[u8]]) -> Hash {
     // Perform the calculation inline, calling this from within a program is
     // not supported
-    #[cfg(not(target_arch = "bpf"))]
-    {
-        let mut hasher = Hasher::default();
-        hasher.hashv(vals);
-        hasher.result()
-    }
-    // Call via a system call to perform the calculation
-    #[cfg(target_arch = "bpf")]
-    {
-        extern "C" {
-            fn sol_sha256(vals: *const u8, val_len: u64, hash_result: *mut u8) -> u64;
-        }
-        let mut hash_result = [0; HASH_BYTES];
-        unsafe {
-            sol_sha256(
-                vals as *const _ as *const u8,
-                vals.len() as u64,
-                &mut hash_result as *mut _ as *mut u8,
-            );
-        }
-        Hash::new_from_array(hash_result)
-    }
+    let mut hasher = Hasher::default();
+    hasher.hashv(vals);
+    hasher.result()
 }
 
 /// Return a Sha256 hash for the given data.