From 38c492bb531f57fa70f68276399e302f90f66176 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 24 Jul 2024 10:00:58 +0200
Subject: [PATCH] std.os.linux.start_pie: Add hexagon support.

---
 lib/std/os/linux/start_pie.zig | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/std/os/linux/start_pie.zig b/lib/std/os/linux/start_pie.zig
index 2f46ebb791..19b6c332f7 100644
--- a/lib/std/os/linux/start_pie.zig
+++ b/lib/std/os/linux/start_pie.zig
@@ -9,6 +9,7 @@ const R_ARC_RELATIVE = 56;
 const R_ARM_RELATIVE = 23;
 const R_AARCH64_RELATIVE = 1027;
 const R_CSKY_RELATIVE = 9;
+const R_HEXAGON_RELATIVE = 35;
 const R_LARCH_RELATIVE = 3;
 const R_68K_RELATIVE = 22;
 const R_RISCV_RELATIVE = 3;
@@ -22,6 +23,7 @@ const R_RELATIVE = switch (builtin.cpu.arch) {
     .arm, .armeb, .thumb, .thumbeb => R_ARM_RELATIVE,
     .aarch64, .aarch64_be => R_AARCH64_RELATIVE,
     .csky => R_CSKY_RELATIVE,
+    .hexagon => R_HEXAGON_RELATIVE,
     .loongarch32, .loongarch64 => R_LARCH_RELATIVE,
     .m68k => R_68K_RELATIVE,
     .riscv64 => R_RISCV_RELATIVE,
@@ -80,6 +82,20 @@ fn getDynamicSymbol() [*]elf.Dyn {
             \\ ldw %[ret], %[ret]
             : [ret] "=r" (-> [*]elf.Dyn),
         ),
+        .hexagon => asm volatile (
+            \\ .weak _DYNAMIC
+            \\ .hidden _DYNAMIC
+            \\ jump 1f
+            \\ .word _DYNAMIC - .
+            \\ 1:
+            \\ r1 = pc
+            \\ r1 = add(r1, #-4)
+            \\ %[ret] = memw(r1)
+            \\ %[ret] = add(r1, %[ret])
+            : [ret] "=r" (-> [*]elf.Dyn),
+            :
+            : "r1"
+        ),
         .loongarch32, .loongarch64 => asm volatile (
             \\ .weak _DYNAMIC
             \\ .hidden _DYNAMIC