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ARM: assembler: define a Kconfig symbol for group relocation support

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Nathan reports the group relocations go out of range in pathological
cases such as allyesconfig kernels, which have little chance of actually
booting but are still used in validation.

So add a Kconfig symbol for this feature, and make it depend on
!COMPILE_TEST.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel
2022-01-24 19:16:58 +01:00
parent 8b806b82bc
commit d6905849f8
5 changed files with 28 additions and 12 deletions
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8
arch/arm/include/asm/current.h
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@@ -37,8 +37,8 @@ static inline __attribute_const__ struct task_struct *get_current(void)
#ifdef CONFIG_CPU_V6
"1: \n\t"
" .subsection 1 \n\t"
#if !(defined(MODULE) && defined(CONFIG_ARM_MODULE_PLTS)) && \
!(defined(CONFIG_LD_IS_LLD) && CONFIG_LLD_VERSION < 140000)
#if defined(CONFIG_ARM_HAS_GROUP_RELOCS) && \
!(defined(MODULE) && defined(CONFIG_ARM_MODULE_PLTS))
"2: " LOAD_SYM_ARMV6(%0, __current) " \n\t"
" b 1b \n\t"
#else
@@ -55,8 +55,8 @@ static inline __attribute_const__ struct task_struct *get_current(void)
#endif
: "=r"(cur));
#elif __LINUX_ARM_ARCH__>= 7 || \
(defined(MODULE) && defined(CONFIG_ARM_MODULE_PLTS)) || \
(defined(CONFIG_LD_IS_LLD) && CONFIG_LLD_VERSION < 140000)
!defined(CONFIG_ARM_HAS_GROUP_RELOCS) || \
(defined(MODULE) && defined(CONFIG_ARM_MODULE_PLTS))
cur = __current;
#else
asm(LOAD_SYM_ARMV6(%0, __current) : "=r"(cur));