[PATCH] arm: move _end to linker symbols
Ilias Apalodimas
ilias.apalodimas at linaro.org
Tue May 28 08:18:27 CEST 2024
commit 6e2228fb052b ("Merge patch series "Clean up arm linker scripts")
was cleaning up linker scripts for armv7 and v8 but was leaving
_end and __secure_stack_start/end.
commit d0b5d9da5de2 ("arm: make _end compiler-generated")
was moving _end to be compiler generated. _end is defined as c variable
in its own section to force the compiler emit relative a reference.
However, defining those in the linker script will do the same thing
since [0].
So let's remove the special sections from the linker scripts, the
variable definitions from sections.c and define them as a symbols.
It's worth noting that _image_binary_end symbol is now redundant and
can be removed in the future.
- SPL
The .end section has been removed from the new binary
[ 5] .end
PROGBITS 00000000fffdf488 000000000002f488 0
0000000000000000 0000000000000000 0 1
[0000000000000003]: WRITE, ALLOC
$~ bloat-o-meter kria_old/spl/u-boot-spl krina_new/spl/u-boot-spl
add/remove: 0/0 grow/shrink: 0/0 up/down: 0/0 (0)
Function old new delta
Total: Before=115980, After=115980, chg +0.00%
$~ readelf -sW kria_old/u-boot kria_new/u-boot | grep -w _end
12047: 000000000813a0f0 0 OBJECT GLOBAL DEFAULT 11 _end
12047: 000000000813a118 0 NOTYPE GLOBAL DEFAULT 11 _end
$~ readelf -sW kria_old/spl/u-boot-spl kria_new/spl/u-boot-spl | grep -w _end
1605: 00000000fffdf488 0 OBJECT GLOBAL DEFAULT 5 _end
1603: 00000000fffdf498 0 NOTYPE GLOBAL DEFAULT 4 _end
$~ readelf -sW old/u-boot new/u-boot | grep -w _end
8847: 0000000000103710 0 OBJECT GLOBAL DEFAULT 11 _end
8847: 0000000000103738 0 NOTYPE GLOBAL DEFAULT 11 _end
$~ readelf -sW old_v7/u-boot new_v7/u-boot | grep -w _end
10638: 000da824 0 OBJECT GLOBAL DEFAULT 10 _end
10637: 000da84c 0 NOTYPE GLOBAL DEFAULT 10 _end
- For both QEMU instances
$~ bloat-o-meter old/u-boot new/u-boot
add/remove: 0/0 grow/shrink: 1/0 up/down: 20/0 (20)
Function old new delta
version_string 50 70 +20
Total: Before=656915, After=656935, chg +0.00%
[0] binutils commit 6b3b0ab89663 ("Make linker assigned symbol dynamic only for shared object")
Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
arch/arm/cpu/arm1136/u-boot-spl.lds | 6 +-----
arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds | 6 +-----
arch/arm/cpu/armv8/u-boot-spl.lds | 7 +------
arch/arm/cpu/u-boot-spl.lds | 6 +-----
arch/arm/cpu/u-boot.lds | 6 +-----
arch/arm/lib/sections.c | 1 -
arch/arm/mach-aspeed/ast2600/u-boot-spl.lds | 6 +-----
arch/arm/mach-at91/arm926ejs/u-boot-spl.lds | 7 +------
arch/arm/mach-at91/armv7/u-boot-spl.lds | 7 +------
arch/arm/mach-omap2/u-boot-spl.lds | 7 +------
arch/arm/mach-rockchip/u-boot-tpl-v8.lds | 7 +------
arch/arm/mach-zynq/u-boot.lds | 6 +-----
board/davinci/da8xxevm/u-boot-spl-da850evm.lds | 7 +------
board/samsung/common/exynos-uboot-spl.lds | 6 +-----
14 files changed, 13 insertions(+), 72 deletions(-)
diff --git a/arch/arm/cpu/arm1136/u-boot-spl.lds b/arch/arm/cpu/arm1136/u-boot-spl.lds
index f83988fd7e6a..b7af29183a97 100644
--- a/arch/arm/cpu/arm1136/u-boot-spl.lds
+++ b/arch/arm/cpu/arm1136/u-boot-spl.lds
@@ -33,11 +33,7 @@ SECTIONS
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4);
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- }
+ _end = .;
.bss :
{
diff --git a/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds b/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
index 7e20448f8108..7c6309246f8b 100644
--- a/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
+++ b/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
@@ -49,11 +49,7 @@ SECTIONS
__bss_end = .;
}
- .end :
- {
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
.dynsym _image_binary_end : { *(.dynsym) }
diff --git a/arch/arm/cpu/armv8/u-boot-spl.lds b/arch/arm/cpu/armv8/u-boot-spl.lds
index ef8af67e11c3..215cedd69a8c 100644
--- a/arch/arm/cpu/armv8/u-boot-spl.lds
+++ b/arch/arm/cpu/armv8/u-boot-spl.lds
@@ -53,12 +53,7 @@ SECTIONS
. = ALIGN(8);
__image_copy_end = .;
-
- .end : {
- . = ALIGN(8);
- *(.__end)
- } >.sram
-
+ _end = .;
_image_binary_end = .;
.bss : {
diff --git a/arch/arm/cpu/u-boot-spl.lds b/arch/arm/cpu/u-boot-spl.lds
index 9ed62395a9c5..eee463a1b1c6 100644
--- a/arch/arm/cpu/u-boot-spl.lds
+++ b/arch/arm/cpu/u-boot-spl.lds
@@ -53,12 +53,8 @@ SECTIONS
__rel_dyn_end = .;
}
- .end :
- {
- *(.__end)
- }
-
_image_binary_end = .;
+ _end = .;
.bss __rel_dyn_start (OVERLAY) : {
__bss_start = .;
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index 707b19795f08..2f50087f57a9 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -166,11 +166,7 @@ SECTIONS
__rel_dyn_end = .;
}
- .end :
- {
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
/*
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index db5463b2bbbc..07efabaa7dc8 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -23,4 +23,3 @@ char __secure_start[0] __section(".__secure_start");
char __secure_end[0] __section(".__secure_end");
char __secure_stack_start[0] __section(".__secure_stack_start");
char __secure_stack_end[0] __section(".__secure_stack_end");
-char _end[0] __section(".__end");
diff --git a/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds b/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds
index ada6570d9712..9502a7384b53 100644
--- a/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds
+++ b/arch/arm/mach-aspeed/ast2600/u-boot-spl.lds
@@ -61,11 +61,7 @@ SECTIONS
__rel_dyn_end = .;
} > .nor
- .end :
- {
- *(.__end)
- } > .nor
-
+ _end = .;
_image_binary_end = .;
.bss : {
diff --git a/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds b/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds
index 1a8bf94dee0c..09cf838cf96e 100644
--- a/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds
+++ b/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds
@@ -33,12 +33,7 @@ SECTIONS
. = ALIGN(4);
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- } >.sram
-
+ _end = .;
_image_binary_end = .;
.bss :
diff --git a/arch/arm/mach-at91/armv7/u-boot-spl.lds b/arch/arm/mach-at91/armv7/u-boot-spl.lds
index 6ca725fc4ce0..460a91d93ec4 100644
--- a/arch/arm/mach-at91/armv7/u-boot-spl.lds
+++ b/arch/arm/mach-at91/armv7/u-boot-spl.lds
@@ -40,12 +40,7 @@ SECTIONS
. = ALIGN(4);
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- } >.sram
-
+ _end = .;
_image_binary_end = .;
.bss :
diff --git a/arch/arm/mach-omap2/u-boot-spl.lds b/arch/arm/mach-omap2/u-boot-spl.lds
index 1d6e5d45b468..3bb759d8a1c8 100644
--- a/arch/arm/mach-omap2/u-boot-spl.lds
+++ b/arch/arm/mach-omap2/u-boot-spl.lds
@@ -39,12 +39,7 @@ SECTIONS
. = ALIGN(4);
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
.bss :
diff --git a/arch/arm/mach-rockchip/u-boot-tpl-v8.lds b/arch/arm/mach-rockchip/u-boot-tpl-v8.lds
index ad32654085b3..958a1b70aefe 100644
--- a/arch/arm/mach-rockchip/u-boot-tpl-v8.lds
+++ b/arch/arm/mach-rockchip/u-boot-tpl-v8.lds
@@ -46,12 +46,7 @@ SECTIONS
. = ALIGN(8);
__image_copy_end = .;
-
- .end : {
- . = ALIGN(8);
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
.bss ALIGN(8) : {
diff --git a/arch/arm/mach-zynq/u-boot.lds b/arch/arm/mach-zynq/u-boot.lds
index 3e0c96c50556..f52523edf490 100644
--- a/arch/arm/mach-zynq/u-boot.lds
+++ b/arch/arm/mach-zynq/u-boot.lds
@@ -68,11 +68,7 @@ SECTIONS
__rel_dyn_end = .;
}
- .end :
- {
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
/*
diff --git a/board/davinci/da8xxevm/u-boot-spl-da850evm.lds b/board/davinci/da8xxevm/u-boot-spl-da850evm.lds
index 7e0f09f3b5b1..56d6f4f114b9 100644
--- a/board/davinci/da8xxevm/u-boot-spl-da850evm.lds
+++ b/board/davinci/da8xxevm/u-boot-spl-da850evm.lds
@@ -46,12 +46,7 @@ SECTIONS
} >.sram
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- }
-
+ _end = .;
_image_binary_end = .;
.bss :
diff --git a/board/samsung/common/exynos-uboot-spl.lds b/board/samsung/common/exynos-uboot-spl.lds
index 73cd97a1b1de..9d3b57e98dbb 100644
--- a/board/samsung/common/exynos-uboot-spl.lds
+++ b/board/samsung/common/exynos-uboot-spl.lds
@@ -41,11 +41,7 @@ SECTIONS
. = ALIGN(4);
__image_copy_end = .;
-
- .end :
- {
- *(.__end)
- } >.sram
+ _end = .;
.bss :
{
--
2.40.1
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