Patchwork [U-Boot,v9,13/30] arm: relocate_code(): Use __image_copy_end for end of relocation

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Submitter Benoît Thébaudeau
Date March 6, 2013, 6:59 p.m.
Message ID <1362596377-5827-13-git-send-email-benoit.thebaudeau@advansee.com>
Download mbox | patch
Permalink /patch/225590/
State Changes Requested
Delegated to: Albert ARIBAUD
Headers show

Comments

Benoît Thébaudeau - March 6, 2013, 6:59 p.m.
Use __image_copy_end instead of __bss_start for the end of the image to
relocate. This is the same as commit 033ca72, but applied to all ARM start.S.

This is a more appropriate symbol naming for an image copy & relocate feature,
and this also saves a useless copy of data put between __image_copy_end and
__bss_start in linker scripts (e.g. relocation information, or MMU
initialization tables used only before jumping to the relocated image).

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
---
Changes in v9: None
Changes in v8:
 - Fix "space before tab" warning.
 - Give more details in patch description.

Changes in v7: None
Changes in v6:
 - New patch.

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/cpu/arm1136/start.S               |    4 ++--
 arch/arm/cpu/arm1176/start.S               |    6 +++++-
 arch/arm/cpu/arm720t/start.S               |    6 +++++-
 arch/arm/cpu/arm920t/ep93xx/u-boot.lds     |    3 +++
 arch/arm/cpu/arm920t/start.S               |    6 +++++-
 arch/arm/cpu/arm925t/start.S               |    6 +++++-
 arch/arm/cpu/arm926ejs/start.S             |    6 +++++-
 arch/arm/cpu/arm946es/start.S              |    6 +++++-
 arch/arm/cpu/arm_intcm/start.S             |    6 +++++-
 arch/arm/cpu/armv7/start.S                 |    4 ++--
 arch/arm/cpu/ixp/start.S                   |    6 +++++-
 arch/arm/cpu/ixp/u-boot.lds                |    2 ++
 arch/arm/cpu/pxa/start.S                   |    6 +++++-
 arch/arm/cpu/s3c44b0/start.S               |    6 +++++-
 arch/arm/cpu/sa1100/start.S                |    6 +++++-
 board/actux1/u-boot.lds                    |    3 +++
 board/actux2/u-boot.lds                    |    3 +++
 board/actux3/u-boot.lds                    |    3 +++
 board/davinci/da8xxevm/u-boot-spl-hawk.lds |    1 +
 board/dvlhost/u-boot.lds                   |    3 +++
 board/samsung/smdk6400/u-boot-nand.lds     |    4 ++++
 board/vpac270/u-boot-spl.lds               |    2 ++
 nand_spl/board/karo/tx25/u-boot.lds        |    2 ++
 nand_spl/board/samsung/smdk6400/u-boot.lds |    2 ++
 24 files changed, 87 insertions(+), 15 deletions(-)

Patch

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 131fd99..b3e3e37 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -104,9 +104,9 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
-.global	_image_copy_end_ofs
+.globl _image_copy_end_ofs
 _image_copy_end_ofs:
-	.word 	__image_copy_end - _start
+	.word __image_copy_end - _start
 
 .globl _bss_end_ofs
 _bss_end_ofs:
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index 7be4e43..4f98f8b 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -127,6 +127,10 @@  _TEXT_PHY_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -251,7 +255,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index 74c0664..850fce0 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -101,6 +101,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -166,7 +170,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm920t/ep93xx/u-boot.lds b/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
index 008ae89..62315de 100644
--- a/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
+++ b/arch/arm/cpu/arm920t/ep93xx/u-boot.lds
@@ -55,6 +55,9 @@  SECTIONS
 	}
 
 	. = ALIGN(4);
+
+	__image_copy_end = .;
+
 	__bss_start = .;
 	.bss : { *(.bss) }
 	__bss_end__ = .;
diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index ba4dd85..e2958d3 100644
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -89,6 +89,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -205,7 +209,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S
index e3b84ef..4b64122 100644
--- a/arch/arm/cpu/arm925t/start.S
+++ b/arch/arm/cpu/arm925t/start.S
@@ -95,6 +95,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -195,7 +199,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 25111f6..edff38a 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -140,6 +140,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -212,7 +216,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S
index 24b8b1d..48b7b62 100644
--- a/arch/arm/cpu/arm946es/start.S
+++ b/arch/arm/cpu/arm946es/start.S
@@ -105,6 +105,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -170,7 +174,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S
index f6934f0..5016c3c 100644
--- a/arch/arm/cpu/arm_intcm/start.S
+++ b/arch/arm/cpu/arm_intcm/start.S
@@ -101,6 +101,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -166,7 +170,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 0975896..cc68347 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -94,9 +94,9 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
-.global	_image_copy_end_ofs
+.globl _image_copy_end_ofs
 _image_copy_end_ofs:
-	.word 	__image_copy_end - _start
+	.word __image_copy_end - _start
 
 .globl _bss_end_ofs
 _bss_end_ofs:
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index 397c660..f6bec3b 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -114,6 +114,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -268,7 +272,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/ixp/u-boot.lds b/arch/arm/cpu/ixp/u-boot.lds
index 81d954f..d9bb5da 100644
--- a/arch/arm/cpu/ixp/u-boot.lds
+++ b/arch/arm/cpu/ixp/u-boot.lds
@@ -54,6 +54,8 @@  SECTIONS
 
 	. = ALIGN(4);
 
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 51dd210..8c64411 100644
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -118,6 +118,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -190,7 +194,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
index f037079..0924925 100644
--- a/arch/arm/cpu/s3c44b0/start.S
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -80,6 +80,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -151,7 +155,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index 03d8a02..fe6c429 100644
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -90,6 +90,10 @@  _TEXT_BASE:
 _bss_start_ofs:
 	.word __bss_start - _start
 
+.globl _image_copy_end_ofs
+_image_copy_end_ofs:
+	.word __image_copy_end - _start
+
 .globl _bss_end_ofs
 _bss_end_ofs:
 	.word __bss_end__ - _start
@@ -155,7 +159,7 @@  relocate_code:
 	subs	r9, r6, r0		/* r9 <- relocation offset */
 	beq	relocate_done		/* skip relocation */
 	mov	r1, r6			/* r1 <- scratch for copy_loop */
-	ldr	r3, _bss_start_ofs
+	ldr	r3, _image_copy_end_ofs
 	add	r2, r0, r3		/* r2 <- source end address	    */
 
 copy_loop:
diff --git a/board/actux1/u-boot.lds b/board/actux1/u-boot.lds
index c41eed0..34ed90d 100644
--- a/board/actux1/u-boot.lds
+++ b/board/actux1/u-boot.lds
@@ -61,6 +61,9 @@  SECTIONS
 	}
 
 	. = ALIGN (4);
+
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/board/actux2/u-boot.lds b/board/actux2/u-boot.lds
index 8409984..8337457 100644
--- a/board/actux2/u-boot.lds
+++ b/board/actux2/u-boot.lds
@@ -61,6 +61,9 @@  SECTIONS
 	}
 
 	. = ALIGN (4);
+
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/board/actux3/u-boot.lds b/board/actux3/u-boot.lds
index a3bd02b..a72a666 100644
--- a/board/actux3/u-boot.lds
+++ b/board/actux3/u-boot.lds
@@ -61,6 +61,9 @@  SECTIONS
 	}
 
 	. = ALIGN (4);
+
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/board/davinci/da8xxevm/u-boot-spl-hawk.lds b/board/davinci/da8xxevm/u-boot-spl-hawk.lds
index 86dc172..174955e 100644
--- a/board/davinci/da8xxevm/u-boot-spl-hawk.lds
+++ b/board/davinci/da8xxevm/u-boot-spl-hawk.lds
@@ -63,6 +63,7 @@  SECTIONS
 	}
 
 	. = ALIGN(4);
+	__image_copy_end = .;
 	__rel_dyn_start = .;
 	__rel_dyn_end = .;
 	__dynsym_start = .;
diff --git a/board/dvlhost/u-boot.lds b/board/dvlhost/u-boot.lds
index 1bd1700..9c14daa 100644
--- a/board/dvlhost/u-boot.lds
+++ b/board/dvlhost/u-boot.lds
@@ -61,6 +61,9 @@  SECTIONS
 	}
 
 	. = ALIGN (4);
+
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/board/samsung/smdk6400/u-boot-nand.lds b/board/samsung/smdk6400/u-boot-nand.lds
index fbb442a..2c3a60b 100644
--- a/board/samsung/smdk6400/u-boot-nand.lds
+++ b/board/samsung/smdk6400/u-boot-nand.lds
@@ -53,6 +53,10 @@  SECTIONS
 		#include <u-boot.lst>
 	}
 
+	. = ALIGN(4);
+
+	__image_copy_end = .;
+
 	. = align(4);
 	.mmudata : { *(.mmudata) }
 
diff --git a/board/vpac270/u-boot-spl.lds b/board/vpac270/u-boot-spl.lds
index 20161a4..e344436 100644
--- a/board/vpac270/u-boot-spl.lds
+++ b/board/vpac270/u-boot-spl.lds
@@ -63,6 +63,8 @@  SECTIONS
 
 	. = ALIGN(4);
 
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/nand_spl/board/karo/tx25/u-boot.lds b/nand_spl/board/karo/tx25/u-boot.lds
index ee36131..95ea8ac 100644
--- a/nand_spl/board/karo/tx25/u-boot.lds
+++ b/nand_spl/board/karo/tx25/u-boot.lds
@@ -54,6 +54,8 @@  SECTIONS
 
 	. = ALIGN(4);
 
+	__image_copy_end = .;
+
 	.rel.dyn : {
 		__rel_dyn_start = .;
 		*(.rel*)
diff --git a/nand_spl/board/samsung/smdk6400/u-boot.lds b/nand_spl/board/samsung/smdk6400/u-boot.lds
index 2ed6466..293ae02 100644
--- a/nand_spl/board/samsung/smdk6400/u-boot.lds
+++ b/nand_spl/board/samsung/smdk6400/u-boot.lds
@@ -58,6 +58,8 @@  SECTIONS
 
 	. = ALIGN(4);
 
+	__image_copy_end = .;
+
 	.rel.dyn : {
 	__rel_dyn_start = .;
 	*(.rel*)