From f84a7b8f54db51172a50926be8b2224413977f75 Mon Sep 17 00:00:00 2001
From: Albert ARIBAUD <albert.u.boot@aribaud.net>
Date: Thu, 11 Apr 2013 05:43:21 +0000
Subject: [PATCH] ARM: Fix __bss_start and __bss_end in linker scripts
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Commit 3ebd1cbc introduced compiler-generated __bss_start
and __bss_end__ and commit c23561e7 rewrote all __bss_end__
as __bss_end. Their merge caused silent and harmless but
potentially bug-inducing clashes between compiler- and linker-
generated __bss_end symbols.
Make __bss_end and __bss_start compiler-only, and create
__bss_base and __bss_limit for linker-only use.
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
---
arch/arm/cpu/ixp/u-boot.lds | 14 ++++++++++----
arch/arm/cpu/u-boot.lds | 14 ++++++++++----
board/actux1/u-boot.lds | 14 ++++++++++----
board/actux2/u-boot.lds | 14 ++++++++++----
board/actux3/u-boot.lds | 14 ++++++++++----
board/dvlhost/u-boot.lds | 14 ++++++++++----
board/freescale/mx31ads/u-boot.lds | 14 ++++++++++----
7 files changed, 70 insertions(+), 28 deletions(-)
diff --git a/arch/arm/cpu/ixp/u-boot.lds b/arch/arm/cpu/ixp/u-boot.lds
index 388a67f101c..553589ca6cb 100644
--- a/arch/arm/cpu/ixp/u-boot.lds
+++ b/arch/arm/cpu/ixp/u-boot.lds
@@ -69,17 +69,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index 3a1083d9a9b..d5e42d3ac94 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -81,18 +81,24 @@ SECTIONS
*(.mmutable)
}
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/board/actux1/u-boot.lds b/board/actux1/u-boot.lds
index 52fc9fc0c66..ef4a25bc3cd 100644
--- a/board/actux1/u-boot.lds
+++ b/board/actux1/u-boot.lds
@@ -77,17 +77,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/board/actux2/u-boot.lds b/board/actux2/u-boot.lds
index cafd3d859d4..00ad8b71cd0 100644
--- a/board/actux2/u-boot.lds
+++ b/board/actux2/u-boot.lds
@@ -77,17 +77,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/board/actux3/u-boot.lds b/board/actux3/u-boot.lds
index 168fe171c4e..44b990ee7ff 100644
--- a/board/actux3/u-boot.lds
+++ b/board/actux3/u-boot.lds
@@ -77,17 +77,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/board/dvlhost/u-boot.lds b/board/dvlhost/u-boot.lds
index dd50bdbecd7..6d4b1875c58 100644
--- a/board/dvlhost/u-boot.lds
+++ b/board/dvlhost/u-boot.lds
@@ -77,17 +77,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.dynstr*) }
diff --git a/board/freescale/mx31ads/u-boot.lds b/board/freescale/mx31ads/u-boot.lds
index f48fda171f7..4969960001d 100644
--- a/board/freescale/mx31ads/u-boot.lds
+++ b/board/freescale/mx31ads/u-boot.lds
@@ -80,17 +80,23 @@ SECTIONS
_end = .;
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
.bss_start __rel_dyn_start (OVERLAY) : {
KEEP(*(.__bss_start));
+ __bss_base = .;
}
- .bss __bss_start (OVERLAY) : {
+ .bss __bss_base (OVERLAY) : {
*(.bss*)
. = ALIGN(4);
- __bss_end = .;
+ __bss_limit = .;
}
- .bss_end __bss_end (OVERLAY) : {
- KEEP(*(__bss_end));
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
}
/DISCARD/ : { *(.bss*) }
--
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