Commit 7411cfc3 authored by Nathan Chancellor's avatar Nathan Chancellor Committed by Russell King (Oracle)

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

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: https://github.com/llvm/llvm-project/commit/48aebfc908ba7b9372aaa478a9c200789491096eSuggested-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarNathan Chancellor <nathan@kernel.org>
Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent c01914ef
...@@ -66,6 +66,8 @@ config UNWINDER_FRAME_POINTER ...@@ -66,6 +66,8 @@ config UNWINDER_FRAME_POINTER
config UNWINDER_ARM config UNWINDER_ARM
bool "ARM EABI stack unwinder" bool "ARM EABI stack unwinder"
depends on AEABI && !FUNCTION_GRAPH_TRACER depends on AEABI && !FUNCTION_GRAPH_TRACER
# https://github.com/ClangBuiltLinux/linux/issues/732
depends on !LD_IS_LLD || LLD_VERSION >= 110000
select ARM_UNWIND select ARM_UNWIND
help help
This option enables stack unwinding support in the kernel This option enables stack unwinding support in the kernel
......
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