arm: make __bss_start and __bss_end__ compiler-generated

Turn __bss_start and __bss_end__ from linker-generated
to compiler-generated symbols, causing relocations for
these symbols to change type, from R_ARM_ABS32 to
R_ARM_RELATIVE.

This should have no functional impact, as it affects
references to __bss_start and __bss_end__ only before
relocation, and no such references are done.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

5 files changed, 64 insertions, 26 deletions

diff --git a/board/actux1/u-boot.lds b/board/actux1/u-boot.lds
index c41eed0e6f0..572bcea5d01 100644
--- a/board/actux1/u-boot.lds
+++ b/board/actux1/u-boot.lds
@@ -41,15 +41,15 @@ SECTIONS
 		*(.text*)
 	}
 
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.rodata : {
 		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
 	}
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.data : {
 		*(.data*)
 	}
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.got : {
 		*(.got)
 	}
@@ -72,13 +72,21 @@ SECTIONS
 		*(.dynsym)
 	}
 
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
+	_end = .;
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+	}
+
+	.bss __bss_start (OVERLAY) : {
 		*(.bss*)
 		 . = ALIGN(4);
-		_end = .;
+		 ___bssend___ = .;
 	}
-	__bss_end__ =.;
+	.bss_end ___bssend___ (OVERLAY) : {
+		KEEP(*(.__bss_end__));
+	}
+
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynamic*) }
 	/DISCARD/ : { *(.plt*) }
diff --git a/board/actux2/u-boot.lds b/board/actux2/u-boot.lds
index 84099840b55..6272a10d1cb 100644
--- a/board/actux2/u-boot.lds
+++ b/board/actux2/u-boot.lds
@@ -41,15 +41,15 @@ SECTIONS
 		*(.text*)
 	}
 
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.rodata : {
 		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
 	}
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.data : {
 		*(.data*)
 	}
-	. = ALIGN (4);
+	. = ALIGN(4);
 	.got : {
 		*(.got)
 	}
@@ -72,13 +72,21 @@ SECTIONS
 		*(.dynsym)
 	}
 
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
+	_end = .;
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+	}
+
+	.bss __bss_start (OVERLAY) : {
 		*(.bss*)
 		 . = ALIGN(4);
-		_end = .;
+		 ___bssend___ = .;
 	}
-	__bss_end__ =.;
+	.bss_end ___bssend___ (OVERLAY) : {
+		KEEP(*(.__bss_end__));
+	}
+
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynamic*) }
 	/DISCARD/ : { *(.plt*) }
diff --git a/board/actux3/u-boot.lds b/board/actux3/u-boot.lds
index a3bd02b0d2b..488e1e7e5b5 100644
--- a/board/actux3/u-boot.lds
+++ b/board/actux3/u-boot.lds
@@ -72,13 +72,21 @@ SECTIONS
 		*(.dynsym)
 	}
 
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
+	_end = .;
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+	}
+
+	.bss __bss_start (OVERLAY) : {
 		*(.bss*)
 		 . = ALIGN(4);
-		_end = .;
+		 ___bssend___ = .;
 	}
-	__bss_end__ =.;
+	.bss_end ___bssend___ (OVERLAY) : {
+		KEEP(*(.__bss_end__));
+	}
+
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynamic*) }
 	/DISCARD/ : { *(.plt*) }
diff --git a/board/dvlhost/u-boot.lds b/board/dvlhost/u-boot.lds
index 1bd1700aa20..6dc26c87275 100644
--- a/board/dvlhost/u-boot.lds
+++ b/board/dvlhost/u-boot.lds
@@ -72,13 +72,21 @@ SECTIONS
 		*(.dynsym)
 	}
 
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
+	_end = .;
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+	}
+
+	.bss __bss_start (OVERLAY) : {
 		*(.bss*)
 		 . = ALIGN(4);
-		_end = .;
+		 ___bssend___ = .;
 	}
-	__bss_end__ =.;
+	.bss_end ___bssend___ (OVERLAY) : {
+		KEEP(*(.__bss_end__));
+	}
+
 	/DISCARD/ : { *(.dynstr*) }
 	/DISCARD/ : { *(.dynamic*) }
 	/DISCARD/ : { *(.plt*) }
diff --git a/board/freescale/mx31ads/u-boot.lds b/board/freescale/mx31ads/u-boot.lds
index 52677299e88..12d7c1256f4 100644
--- a/board/freescale/mx31ads/u-boot.lds
+++ b/board/freescale/mx31ads/u-boot.lds
@@ -80,11 +80,17 @@ SECTIONS
 
 	_end = .;
 
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
-		*(.bss)
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+	}
+
+	.bss __bss_start (OVERLAY) : {
+		*(.bss*)
 		 . = ALIGN(4);
-		__bss_end__ = .;
+		 ___bssend___ = .;
+	}
+	.bss_end ___bssend___ (OVERLAY) : {
+		KEEP(*(.__bss_end__));
 	}
 
 	/DISCARD/ : { *(.bss*) }