From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
clang-built-linux@googlegroups.com,
Fangrui Song <maskray@google.com>,
Nathan Chancellor <natechancellor@gmail.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2] MIPS: Truncate load-y into 32bit for 32bit kernel
Date: Tue, 7 Apr 2020 16:06:11 +0800 [thread overview]
Message-ID: <20200407080611.859256-1-jiaxun.yang@flygoat.com> (raw)
In-Reply-To: <20200405082451.694910-1-jiaxun.yang@flygoat.com>
LLD failed to link vmlinux with 64bit load address for 32bit ELF
while bfd will strip 64bit address into 32bit silently.
To fix LLD build, we should truncate load address provided by platform
into 32bit for 32bit kernel.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
--
V2: Take MaskRay's shell magic.
---
arch/mips/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index e1c44aed8156..f8fd3c39fb55 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -286,6 +286,9 @@ ifdef CONFIG_64BIT
$(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
endif
endif
+else
+ # Truncate address into 32-bit
+ load-y := 0x$(shell echo "$(load-y)" | rev | head -c 8 | rev)
endif
KBUILD_AFLAGS += $(cflags-y)
--
2.26.0.rc2
next prev parent reply other threads:[~2020-04-07 8:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 8:24 [PATCH] MIPS: malta: Set load address for 32bit kernel correctly Jiaxun Yang
2020-04-05 16:47 ` Maciej W. Rozycki
2020-04-05 16:53 ` Jiaxun Yang
2020-04-05 17:23 ` Maciej W. Rozycki
2020-04-06 10:57 ` YunQiang Su
2020-04-06 11:10 ` Jiaxun Yang
2020-04-06 16:43 ` Fangrui Song
2020-04-07 8:06 ` Jiaxun Yang [this message]
2020-04-07 17:21 ` [PATCH v2] MIPS: Truncate load-y into 32bit for 32bit kernel Nick Desaulniers
2020-04-07 18:00 ` Fangrui Song
2020-04-07 18:10 ` Maciej W. Rozycki
2020-04-10 9:06 ` [PATCH v3] MIPS: Truncate link address " Jiaxun Yang
2020-04-10 20:45 ` Kees Cook
2020-04-10 23:40 ` Maciej W. Rozycki
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