linux-kernel - [PATCH v2] powerpc/boot: Set LANG=C in wrapper script

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Date:   Tue, 26 Oct 2021 15:45:15 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2] powerpc/boot: Set LANG=C in wrapper script

While trying to build a simple Image for ACADIA platform, I got the
following error:

	  WRAP    arch/powerpc/boot/simpleImage.acadia
	INFO: Uncompressed kernel (size 0x6ae7d0) overlaps the address of the wrapper(0x400000)
	INFO: Fixing the link_address of wrapper to (0x700000)
	powerpc64-linux-gnu-ld : mode d'émulation non reconnu : -T
	Émulations prises en charge : elf64ppc elf32ppc elf32ppclinux elf32ppcsim elf64lppc elf32lppc elf32lppclinux elf32lppcsim
	make[1]: *** [arch/powerpc/boot/Makefile:424 : arch/powerpc/boot/simpleImage.acadia] Erreur 1
	make: *** [arch/powerpc/Makefile:285 : simpleImage.acadia] Erreur 2

Trying again with V=1 shows the following command

	powerpc64-linux-gnu-ld -m -T arch/powerpc/boot/zImage.lds -Ttext 0x700000 --no-dynamic-linker -o arch/powerpc/boot/simpleImage.acadia -Map wrapper.map arch/powerpc/boot/fixed-head.o arch/powerpc/boot/simpleboot.o ./zImage.3278022.o arch/powerpc/boot/wrapper.a

The argument of '-m' is missing.

This is due to the wrapper script calling 'objdump -p vmlinux' and
looking for 'file format', whereas the output of objdump is:

	vmlinux:     format de fichier elf32-powerpc

	En-tête de programme:
	    LOAD off    0x00010000 vaddr 0xc0000000 paddr 0x00000000 align 2**16
	         filesz 0x0069e1d4 memsz 0x006c128c flags rwx
	    NOTE off    0x0064591c vaddr 0xc063591c paddr 0x0063591c align 2**2
	         filesz 0x00000054 memsz 0x00000054 flags ---

Add LC_ALL=C at the beginning of the wrapper script in order to get the
output expected by the script:

	vmlinux:     file format elf32-powerpc

	Program Header:
	    LOAD off    0x00010000 vaddr 0xc0000000 paddr 0x00000000 align 2**16
	         filesz 0x0069e1d4 memsz 0x006c128c flags rwx
	    NOTE off    0x0064591c vaddr 0xc063591c paddr 0x0063591c align 2**2
	         filesz 0x00000054 memsz 0x00000054 flags ---

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
v2: Use LC_ALL=C per Segher
---
 arch/powerpc/boot/wrapper | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 1cd82564c996..9184eda780fd 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -26,6 +26,8 @@
 # Stop execution if any command fails
 set -e
 
+export LC_ALL=C
+
 # Allow for verbose output
 if [ "$V" = 1 ]; then
     set -x
-- 
2.31.1