From 800e538a58063276b643d1102d2e49d591b3df2d Mon Sep 17 00:00:00 2001
From: Thomas Winwood <twwinwood@gmail.com>
Date: Wed, 9 Jan 2019 03:38:25 +0000
Subject: [PATCH 1/2] Add .bss section to linker script

---
 linker.ld | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/linker.ld b/linker.ld
index 471cb0f..135b077 100644
--- a/linker.ld
+++ b/linker.ld
@@ -26,6 +26,11 @@ SECTIONS {
         __data_end = ABSOLUTE(.);
     } >iwram AT>rom = 0xff
 
+    .bss : {
+        *(.bss .bss.*);
+        . = ALIGN(4);
+    } >iwram
+
     /* debugging sections */
     /* Stabs */
     .stab            0 : { *(.stab) }

From 1f75cf025dc45dcfe3058e390404e3132df72317 Mon Sep 17 00:00:00 2001
From: Thomas Winwood <twwinwood@gmail.com>
Date: Wed, 9 Jan 2019 04:00:36 +0000
Subject: [PATCH 2/2] Add symbol for the end of the .bss section

---
 linker.ld | 1 +
 1 file changed, 1 insertion(+)

diff --git a/linker.ld b/linker.ld
index 135b077..0be97b2 100644
--- a/linker.ld
+++ b/linker.ld
@@ -29,6 +29,7 @@ SECTIONS {
     .bss : {
         *(.bss .bss.*);
         . = ALIGN(4);
+        __bss_end = ABSOLUTE(.);
     } >iwram
 
     /* debugging sections */