[PATCH] sandbox: cleanup linker scripts and sections
Ilias Apalodimas
ilias.apalodimas at linaro.org
Fri Jun 14 08:53:56 CEST 2024
commit 6e2228fb052b ("Merge patch series "Clean up arm linker scripts"")
was cleaning up linker scripts for armv7 and v8 in a similar fashion.
Several commits in the past -- e.g
commit d0b5d9da5de2 ("arm: make _end compiler-generated")
was moving symbols to be compiler generated. They were defined as c
variables 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 the linker was discarding the symbols in the
older binary completely.
- new binary
$~ aarch64-linux-gnu-readelf -sW u-boot | grep efi_runtim
246: 000000000004acbe 13 FUNC LOCAL DEFAULT 14 vbe_req_efi_runtime_rand
3198: 0000000000318690 16 OBJECT LOCAL DEFAULT 29 efi_runtime_mmio
6359: 00000000000dedff 217 FUNC LOCAL DEFAULT 14 efi_runtime_relocate
7942: 00000000003074c0 136 OBJECT GLOBAL HIDDEN 29 efi_runtime_services
8869: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_rel_stop
9159: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_stop
9410: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_start
10137: 00000000005981bd 0 NOTYPE WEAK HIDDEN 33 efi_runtime.c.de5bed54
10470: 0000000000305e20 0 NOTYPE GLOBAL DEFAULT 27 __efi_runtime_rel_start
- old binary
$~ aarch64-linux-gnu-readelf -sW u-boot.old | grep efi_runtim
246: 000000000004acbe 13 FUNC LOCAL DEFAULT 14 vbe_req_efi_runtime_rand
3198: 0000000000318690 16 OBJECT LOCAL DEFAULT 29 efi_runtime_mmio
6359: 00000000000dedff 221 FUNC LOCAL DEFAULT 14 efi_runtime_relocate
7942: 00000000003074c0 136 OBJECT GLOBAL HIDDEN 29 efi_runtime_services
10135: 0000000000598320 0 NOTYPE WEAK HIDDEN 33 efi_runtime.c.de5bed54
$~ bloat-o-meter u-bool.old u-boot
add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-4 (3)
Function old new delta
efi_memory_init 343 350 +7
efi_runtime_relocate 221 217 -4
Total: Before=2009902, After=2009905, chg +0.00%
[0] binutils commit 6b3b0ab89663 ("Make linker assigned symbol dynamic only for shared object")
Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
arch/sandbox/cpu/u-boot.lds | 20 ++++----------------
arch/sandbox/lib/Makefile | 2 +-
arch/sandbox/lib/sections.c | 13 -------------
3 files changed, 5 insertions(+), 30 deletions(-)
delete mode 100644 arch/sandbox/lib/sections.c
diff --git a/arch/sandbox/cpu/u-boot.lds b/arch/sandbox/cpu/u-boot.lds
index 52f13af3742f..6ee8095b6cbb 100644
--- a/arch/sandbox/cpu/u-boot.lds
+++ b/arch/sandbox/cpu/u-boot.lds
@@ -19,30 +19,18 @@ SECTIONS
*(_u_boot_sandbox_getopt_end)
}
- efi_runtime_start : {
- *(___efi_runtime_start)
- }
-
efi_runtime : {
+ __efi_runtime_start = .;
*(efi_runtime_text)
*(efi_runtime_data)
- }
-
- efi_runtime_stop : {
- *(___efi_runtime_stop)
- }
-
- efi_runtime_rel_start : {
- *(___efi_runtime_rel_start)
+ __efi_runtime_stop = .;
}
efi_runtime_rel : {
+ __efi_runtime_rel_start = .;
*(.relefi_runtime_text)
*(.relefi_runtime_data)
- }
-
- efi_runtime_rel_stop : {
- *(___efi_runtime_rel_stop)
+ __efi_runtime_rel_stop = .;
}
.dynsym :
diff --git a/arch/sandbox/lib/Makefile b/arch/sandbox/lib/Makefile
index a2bc5a7ee60f..d7d15a50bb6c 100644
--- a/arch/sandbox/lib/Makefile
+++ b/arch/sandbox/lib/Makefile
@@ -5,7 +5,7 @@
# (C) Copyright 2002-2006
# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
-obj-y += fdt_fixup.o interrupts.o sections.o
+obj-y += fdt_fixup.o interrupts.o
obj-$(CONFIG_PCI) += pci_io.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-$(CONFIG_CMD_BOOTZ) += bootm.o
diff --git a/arch/sandbox/lib/sections.c b/arch/sandbox/lib/sections.c
deleted file mode 100644
index 2f2f3fbfdb86..000000000000
--- a/arch/sandbox/lib/sections.c
+++ /dev/null
@@ -1,13 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2013 Albert ARIBAUD <albert.u.boot at aribaud.net>
- *
- */
-#include <linux/compiler.h>
-
-char __efi_runtime_start[0] __section("___efi_runtime_start");
-char __efi_runtime_stop[0] __section("___efi_runtime_stop");
-char __efi_runtime_rel_start[0]
- __section("___efi_runtime_rel_start");
-char __efi_runtime_rel_stop[0]
- __section("___efi_runtime_rel_stop");
--
2.45.1
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