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ARM: 9070/1: Make UNWINDER_ARM depend on ld.bfd or ld.lld 11.0.0+

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When linking aspeed_g5_defconfig with ld.lld 10.0.1, the following error
occurs:

ld.lld: error: .tmp_vmlinux.kallsyms1:(.ARM.exidx+0x34D98): relocation
R_ARM_PREL31 out of range: 2135538592 is not in [-1073741824,
1073741823]

This was resolved in ld.lld 11.0.0 but the minimum supported version of
ld.lld for the kernel is 10.0.1. Prevent CONFIG_UNWINDER_ARM from being
selected in this case so that the problematic sections cannot be
created.

Link: https://github.com/ClangBuiltLinux/linux/issues/732
Link: 48aebfc908

Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Nathan Chancellor 2021-03-25 21:04:40 +01:00 committed by Russell King (Oracle)
parent c01914efea
commit 7411cfc3c9
1 changed files with 2 additions and 0 deletions
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2
arch/arm/Kconfig.debug
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@ -66,6 +66,8 @@ config UNWINDER_FRAME_POINTER
config UNWINDER_ARM
bool "ARM EABI stack unwinder"
depends on AEABI && !FUNCTION_GRAPH_TRACER
# https://github.com/ClangBuiltLinux/linux/issues/732
depends on !LD_IS_LLD || LLD_VERSION >= 110000
select ARM_UNWIND
help
This option enables stack unwinding support in the kernel