From e5bf8b0f354ed6108f2c8f1806946112ed80989d Mon Sep 17 00:00:00 2001
From: Noratrieb <48135649+Noratrieb@users.noreply.github.com>
Date: Wed, 25 Dec 2024 16:49:20 +0100
Subject: [PATCH 1/2] Make x86_64-unknown-linux-gno panic=abort and mark as
 no_std

Without a standard library, we cannot unwind, so it should be
panic=abort by default.

Additionally, it does not have std because while it is
Linux, it cannot use libc, which std uses today for Linux.
---
 .../src/spec/targets/x86_64_unknown_linux_none.rs            | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_none.rs b/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_none.rs
index 900dbed205c8e..2e63ff2157286 100644
--- a/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_none.rs
+++ b/compiler/rustc_target/src/spec/targets/x86_64_unknown_linux_none.rs
@@ -1,4 +1,4 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, PanicStrategy, StackProbeType, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::linux::opts();
@@ -7,6 +7,7 @@ pub(crate) fn target() -> Target {
     base.stack_probes = StackProbeType::Inline;
     base.linker_flavor = LinkerFlavor::Gnu(Cc::No, Lld::Yes);
     base.linker = Some("rust-lld".into());
+    base.panic_strategy = PanicStrategy::Abort;
 
     Target {
         llvm_target: "x86_64-unknown-linux-none".into(),
@@ -14,7 +15,7 @@ pub(crate) fn target() -> Target {
             description: None,
             tier: None,
             host_tools: None,
-            std: Some(true),
+            std: Some(false),
         },
         pointer_width: 64,
         data_layout:

From b235cc9e703c323a3ae01951980c776e916ea34e Mon Sep 17 00:00:00 2001
From: Noratrieb <48135649+Noratrieb@users.noreply.github.com>
Date: Wed, 25 Dec 2024 16:59:55 +0100
Subject: [PATCH 2/2] Document x86_64-unknown-linux-none is PIE by default

---
 .../rustc/src/platform-support/x86_64-unknown-linux-none.md  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/doc/rustc/src/platform-support/x86_64-unknown-linux-none.md b/src/doc/rustc/src/platform-support/x86_64-unknown-linux-none.md
index 5608b5cb77811..965d6aea93189 100644
--- a/src/doc/rustc/src/platform-support/x86_64-unknown-linux-none.md
+++ b/src/doc/rustc/src/platform-support/x86_64-unknown-linux-none.md
@@ -14,6 +14,11 @@ This target is cross compiled and can be built from any host.
 
 This target has no support for host tools, std, or alloc.
 
+One of the primary motivations of the target is to write a dynamic linker and libc in Rust.
+For that, the target defaults to position-independent code and position-independent executables (PIE) by default.
+PIE binaries need relocation at runtime. This is usually done by the dynamic linker or libc.
+You can use `-Crelocation-model=static` to create a position-dependent binary that does not need relocation at runtime.
+
 ## Building the target
 
 The target can be built by enabling it for a `rustc` build: