[RFC PATCH 4/6] arm: clean up v7 and v8 linker scripts for __rel_dyn_start/end

[Ilias Apalodimas]

commit 47bd65ef057f ("arm: make __rel_dyn_{start, end} compiler-generated")
were moving the __rel_dyn_start/end on c generated variables that were
injected in their own sections. The reason was that we needed relative
relocations for position independent code.

However, the linker documentation pages states that symbols that are
defined within a section definition will create a relocatable
type with the value being a fixed offset from the base of a section [0].

[0] https://ftp.gnu.org/old-gnu/Manuals/ld-2.9.1/html_mono/ld.html#SEC13

Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
 arch/arm/cpu/armv8/u-boot.lds             | 16 +++-------------
 arch/arm/cpu/u-boot.lds                   | 14 +++-----------
 arch/arm/lib/sections.c                   |  2 --
 arch/arm/mach-zynq/u-boot.lds             | 14 +++-----------
 board/qualcomm/dragonboard820c/u-boot.lds | 15 +++------------
 5 files changed, 12 insertions(+), 49 deletions(-)

diff --git a/arch/arm/cpu/armv8/u-boot.lds b/arch/arm/cpu/armv8/u-boot.lds
index eccb116d3cfa..e737de761a9d 100644
--- a/arch/arm/cpu/armv8/u-boot.lds
+++ b/arch/arm/cpu/armv8/u-boot.lds
@@ -129,20 +129,10 @@ SECTIONS
 		*(.__image_copy_end)
 	}

-	. = ALIGN(8);
-
-	.rel_dyn_start :
-	{
-		*(.__rel_dyn_start)
-	}
-
-	.rela.dyn : {
+	.rela.dyn ALIGN(8) : {
+		__rel_dyn_start = .;
 		*(.rela*)
-	}
-
-	.rel_dyn_end :
-	{
-		*(.__rel_dyn_end)
+		__rel_dyn_end = .;
 	}

 	_end = .;
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index 70e78ce46672..7c6e7891d360 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -166,18 +166,10 @@ SECTIONS
 		*(.__image_copy_end)
 	}

-	.rel_dyn_start :
-	{
-		*(.__rel_dyn_start)
-	}
-
-	.rel.dyn : {
+	.rel.dyn ALIGN(4) : {
+		__rel_dyn_start = .;
 		*(.rel*)
-	}
-
-	.rel_dyn_end :
-	{
-		*(.__rel_dyn_end)
+		__rel_dyn_end = .;
 	}

 	.end :
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index ddfde52163fc..1ee3dd3667ba 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -21,8 +21,6 @@

 char __image_copy_start[0] __section(".__image_copy_start");
 char __image_copy_end[0] __section(".__image_copy_end");
-char __rel_dyn_start[0] __section(".__rel_dyn_start");
-char __rel_dyn_end[0] __section(".__rel_dyn_end");
 char __secure_start[0] __section(".__secure_start");
 char __secure_end[0] __section(".__secure_end");
 char __secure_stack_start[0] __section(".__secure_stack_start");
diff --git a/arch/arm/mach-zynq/u-boot.lds b/arch/arm/mach-zynq/u-boot.lds
index 66a9e37f9198..71dea4a1f60a 100644
--- a/arch/arm/mach-zynq/u-boot.lds
+++ b/arch/arm/mach-zynq/u-boot.lds
@@ -71,18 +71,10 @@ SECTIONS
 		*(.__image_copy_end)
 	}

-	.rel_dyn_start :
-	{
-		*(.__rel_dyn_start)
-	}
-
-	.rel.dyn : {
+	.rel.dyn ALIGN(8) : {
+		__rel_dyn_start = .;
 		*(.rel*)
-	}
-
-	.rel_dyn_end :
-	{
-		*(.__rel_dyn_end)
+		__rel_dyn_end = .;
 	}

 	.end :
diff --git a/board/qualcomm/dragonboard820c/u-boot.lds b/board/qualcomm/dragonboard820c/u-boot.lds
index d3cc5278b610..2969f139bfd2 100644
--- a/board/qualcomm/dragonboard820c/u-boot.lds
+++ b/board/qualcomm/dragonboard820c/u-boot.lds
@@ -69,20 +69,11 @@ SECTIONS
 		*(.__image_copy_end)
 	}

-	. = ALIGN(8);
-
-	.rel_dyn_start :
-	{
-		*(.__rel_dyn_start)
-	}

-	.rela.dyn : {
+	.rela.dyn ALIGN(8) : {
+		__rel_dyn_start = .;
 		*(.rela*)
-	}
-
-	.rel_dyn_end :
-	{
-		*(.__rel_dyn_end)
+		__rel_dyn_end = .;
 	}

 	_end = .;
--
2.37.2