diff options
| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2026-01-09 11:08:49 +0100 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2026-02-09 12:53:10 +0100 |
| commit | 0bce126ab7e5719ead2f9144057b83bd285b1b23 (patch) | |
| tree | 48892d2f46ae0d6d5de4d6aa58200d87caa9614d /arch | |
| parent | e93bb4b76cfefb302534246e892c7667491cb8cc (diff) | |
MIPS: Implement ARCH_HAS_CC_CAN_LINK
The generic CC_CAN_LINK detection does not handle different byte orders
or ABIs. This may lead to userprogs which are not actually runnable on
the target kernel.
Use architecture-specific logic supporting byte orders instead.
Modern 64-bit toolchains default to a n32 libc, which are not
supported by all kernel configurations, as MIPS32_N32 is optional.
On 64-bit, test for a n32 ABI libc first and fall back to o64 and
o32 if necessary.
Link: https://lore.kernel.org/lkml/20260105100507-14db55e3-aa71-48bf-a6ac-33b186bd082f@linutronix.de/
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d87db7c535ea..28a5ef6704a3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -4,6 +4,7 @@ config MIPS default y select ARCH_32BIT_OFF_T if !64BIT select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT + select ARCH_HAS_CC_CAN_LINK select ARCH_HAS_CPU_CACHE_ALIASING select ARCH_HAS_CPU_FINALIZE_INIT select ARCH_HAS_CURRENT_STACK_POINTER @@ -3125,6 +3126,33 @@ config CC_HAS_MNO_BRANCH_LIKELY config CC_HAS_BROKEN_INLINE_COMPAT_BRANCH def_bool y if CC_IS_CLANG +config ARCH_CC_CAN_LINK_N32 + bool + default $(cc_can_link_user,-mabi=n32 -EL) if MIPS32_N32 && CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-mabi=n32 -EB) if MIPS32_N32 && CPU_BIG_ENDIAN + +config ARCH_CC_CAN_LINK_N64 + bool + default $(cc_can_link_user,-mabi=64 -EL) if 64BIT && CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-mabi=64 -EB) if 64BIT && CPU_BIG_ENDIAN + +config ARCH_CC_CAN_LINK_O32 + bool + default $(cc_can_link_user,-mabi=32 -EL) if (32BIT || MIPS32_O32) && CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-mabi=32 -EB) if (32BIT || MIPS32_O32) && CPU_BIG_ENDIAN + +config ARCH_CC_CAN_LINK + def_bool ARCH_CC_CAN_LINK_N32 || ARCH_CC_CAN_LINK_N64 || ARCH_CC_CAN_LINK_O32 + +config ARCH_USERFLAGS + string + default "-mabi=n32 -EL" if ARCH_CC_CAN_LINK_N32 && CPU_LITTLE_ENDIAN + default "-mabi=n32 -EB" if ARCH_CC_CAN_LINK_N32 && CPU_BIG_ENDIAN + default "-mabi=64 -EL" if ARCH_CC_CAN_LINK_N64 && CPU_LITTLE_ENDIAN + default "-mabi=64 -EB" if ARCH_CC_CAN_LINK_N64 && CPU_BIG_ENDIAN + default "-mabi=32 -EL" if ARCH_CC_CAN_LINK_O32 && CPU_LITTLE_ENDIAN + default "-mabi=32 -EB" if ARCH_CC_CAN_LINK_O32 && CPU_BIG_ENDIAN + menu "Power management options" config ARCH_HIBERNATION_POSSIBLE |