Patchwork [U-Boot,2/5] arm: make __image_copy_{start, end} compiler-generated

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Submitter Albert ARIBAUD
Date May 14, 2013, 8:02 p.m.
Message ID <1368561780-19104-3-git-send-email-albert.u.boot@aribaud.net>
Download mbox | patch
Permalink /patch/243819/
State Superseded
Delegated to: Albert ARIBAUD
Headers show

Comments

Albert ARIBAUD - May 14, 2013, 8:02 p.m.
This change is only done where needed: some linker
scripts may contain __image_copy_{start,end} yet
remain unchanged.

Also, __image_copy_end needs its own section; putting
it in relocation sections changes the sections's nature
which breaks relocation.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
---
 arch/arm/cpu/arm920t/ep93xx/u-boot.lds |    6 +++++-
 arch/arm/cpu/ixp/u-boot.lds            |    6 +++++-
 arch/arm/cpu/u-boot.lds                |    7 +++++--
 arch/arm/lib/relocate.S                |    7 ++-----
 arch/arm/lib/sections.c                |    2 ++
 board/actux1/u-boot.lds                |    6 +++++-
 board/actux2/u-boot.lds                |    6 +++++-
 board/actux3/u-boot.lds                |    6 +++++-
 board/dvlhost/u-boot.lds               |    6 +++++-
 board/freescale/mx31ads/u-boot.lds     |    6 +++++-
 10 files changed, 44 insertions(+), 14 deletions(-)

Patch

diff --git a/arch/arm/cpu/arm920t/ep93xx/u-boot.lds b/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
index cf55bf7..367c805 100644
--- a/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
+++ b/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
@@ -31,6 +31,7 @@  SECTIONS
 	. = ALIGN(4);
 	.text      :
 	{
+		*(.__image_copy_start)
 	  arch/arm/cpu/arm920t/start.o	(.text*)
 		/* the EP93xx expects to find the pattern 'CRUS' at 0x1000 */
 	  . = 0x1000;
@@ -56,7 +57,10 @@  SECTIONS
 
 	. = ALIGN(4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	__bss_start = .;
 	.bss : { *(.bss*) }
diff --git a/arch/arm/cpu/ixp/u-boot.lds b/arch/arm/cpu/ixp/u-boot.lds
index 553589c..514c6ec 100644
--- a/arch/arm/cpu/ixp/u-boot.lds
+++ b/arch/arm/cpu/ixp/u-boot.lds
@@ -31,6 +31,7 @@  SECTIONS
 	. = ALIGN(4);
 	.text :
 	{
+		*(.__image_copy_start)
 		arch/arm/cpu/ixp/start.o(.text*)
 		*(.text*)
 	}
@@ -54,7 +55,10 @@  SECTIONS
 
 	. = ALIGN(4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index d9bbee3..8950f5a 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -33,7 +33,7 @@  SECTIONS
 	. = ALIGN(4);
 	.text :
 	{
-		__image_copy_start = .;
+		*(.__image_copy_start)
 		CPUDIR/start.o (.text*)
 		*(.text*)
 	}
@@ -57,7 +57,10 @@  SECTIONS
 
 	. = ALIGN(4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/arch/arm/lib/relocate.S b/arch/arm/lib/relocate.S
index 9e91fae..2f22c8c 100644
--- a/arch/arm/lib/relocate.S
+++ b/arch/arm/lib/relocate.S
@@ -39,12 +39,11 @@ 
 ENTRY(relocate_code)
 	mov	r6, r0	/* save addr of destination */
 
-	ldr	r0, =_start
+	ldr	r0, =__image_copy_start	/* r0 <- source start address */
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy loop */
-	ldr	r3, _image_copy_end_ofs
-	add	r2, r0, r3		/* r2 <- source end address	    */
+	ldr	r2, =__image_copy_end	/* r2 <- source end address	    */
 
 copy_loop:
 	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */
@@ -99,8 +98,6 @@  relocate_done:
         bx        lr
 #endif
 
-_image_copy_end_ofs:
-	.word __image_copy_end - relocate_code
 _rel_dyn_start_ofs:
 	.word __rel_dyn_start - relocate_code
 _rel_dyn_end_ofs:
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index e52fec9..03e846f 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -37,3 +37,5 @@ 
 
 char __bss_start[0] __attribute__((section(".__bss_start")));
 char __bss_end[0] __attribute__((section(".__bss_end")));
+char __image_copy_start[0] __attribute__((section(".__image_copy_start")));
+char __image_copy_end[0] __attribute__((section(".__image_copy_end")));
diff --git a/board/actux1/u-boot.lds b/board/actux1/u-boot.lds
index ef4a25b..80db9ff 100644
--- a/board/actux1/u-boot.lds
+++ b/board/actux1/u-boot.lds
@@ -30,6 +30,7 @@  SECTIONS
 
 	. = ALIGN (4);
 	.text : {
+		*(.__image_copy_start)
 		arch/arm/cpu/ixp/start.o(.text*)
 		net/libnet.o(.text*)
 		board/actux1/libactux1.o(.text*)
@@ -62,7 +63,10 @@  SECTIONS
 
 	. = ALIGN (4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/board/actux2/u-boot.lds b/board/actux2/u-boot.lds
index 00ad8b7..61f2e61 100644
--- a/board/actux2/u-boot.lds
+++ b/board/actux2/u-boot.lds
@@ -30,6 +30,7 @@  SECTIONS
 
 	. = ALIGN (4);
 	.text : {
+		*(.__image_copy_start)
 		arch/arm/cpu/ixp/start.o(.text*)
 		net/libnet.o(.text*)
 		board/actux2/libactux2.o(.text*)
@@ -62,7 +63,10 @@  SECTIONS
 
 	. = ALIGN (4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/board/actux3/u-boot.lds b/board/actux3/u-boot.lds
index 44b990e..c1ad8b5 100644
--- a/board/actux3/u-boot.lds
+++ b/board/actux3/u-boot.lds
@@ -30,6 +30,7 @@  SECTIONS
 
 	. = ALIGN (4);
 	.text : {
+		*(.__image_copy_start)
 		arch/arm/cpu/ixp/start.o(.text*)
 		net/libnet.o(.text*)
 		board/actux3/libactux3.o(.text*)
@@ -62,7 +63,10 @@  SECTIONS
 
 	. = ALIGN (4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/board/dvlhost/u-boot.lds b/board/dvlhost/u-boot.lds
index 6d4b187..71275c1 100644
--- a/board/dvlhost/u-boot.lds
+++ b/board/dvlhost/u-boot.lds
@@ -30,6 +30,7 @@  SECTIONS
 
 	. = ALIGN (4);
 	.text : {
+		*(.__image_copy_start)
 		arch/arm/cpu/ixp/start.o(.text*)
 		net/libnet.o(.text*)
 		board/dvlhost/libdvlhost.o(.text*)
@@ -62,7 +63,10 @@  SECTIONS
 
 	. = ALIGN (4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;
diff --git a/board/freescale/mx31ads/u-boot.lds b/board/freescale/mx31ads/u-boot.lds
index 4969960..acb8244 100644
--- a/board/freescale/mx31ads/u-boot.lds
+++ b/board/freescale/mx31ads/u-boot.lds
@@ -34,6 +34,7 @@  SECTIONS
 	. = ALIGN(4);
 	.text	   :
 	{
+		*(.__image_copy_start)
 	  /* WARNING - the following is hand-optimized to fit within	*/
 	  /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
@@ -65,7 +66,10 @@  SECTIONS
 
 	. = ALIGN(4);
 
-	__image_copy_end = .;
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
 
 	.rel.dyn : {
 		__rel_dyn_start = .;