[PATCH v2 06/10] powerpc: Implement custom CC_CAN_LINK
From: Thomas Weißschuh <hidden>
Date: 2025-10-14 13:05:55
Also in:
linux-kbuild, linux-mips, linux-riscv, linux-s390, lkml, sparclinux
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
The generic CC_CAN_LINK detection does not handle different byte orders. This may lead to userprogs which are not actually runnable on the target kernel. Use architecture-specific logic supporting byte orders instead. Signed-off-by: Thomas Weißschuh <redacted> --- arch/powerpc/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e24f4d88885ae52e77fcb523040e8d31f167571f..c6887a2b97530b9c5b8c34dd0baa3ef8548cb43d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -127,6 +127,7 @@ config PPC select ARCH_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE select ARCH_ENABLE_MEMORY_HOTPLUG select ARCH_ENABLE_MEMORY_HOTREMOVE + select ARCH_HAS_CC_CAN_LINK select ARCH_HAS_COPY_MC if PPC64 select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DEBUG_VIRTUAL
@@ -1341,6 +1342,20 @@ endif config PPC_LIB_RHEAP bool +config ARCH_CC_CAN_LINK + bool + default $(cc_can_link_user,-m64 -mlittle-endian) if 64BIT && CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-m64 -mbig-endian) if 64BIT && CPU_BIG_ENDIAN + default $(cc_can_link_user,-m32 -mlittle-endian) if CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-m32 -mbig-endian) if CPU_BIG_ENDIAN + +config ARCH_USERFLAGS + string + default "-m64 -mlittle-endian" if 64BIT && CPU_LITTLE_ENDIAN + default "-m64 -mbig-endian" if 64BIT && CPU_BIG_ENDIAN + default "-m32 -mlittle-endian" if CPU_LITTLE_ENDIAN + default "-m32 -mbig-endian" if CPU_BIG_ENDIAN + source "arch/powerpc/kvm/Kconfig" source "kernel/livepatch/Kconfig"
--
2.51.0