diff options
| author | Ard Biesheuvel | 2025-03-11 12:06:19 +0100 |
|---|---|---|
| committer | Masahiro Yamada | 2025-03-17 00:29:50 +0900 |
| commit | 9b400d17259b70d1d68585028e96b30152d0796a (patch) | |
| tree | dd967c6890ffd783ee65b3b3b749c0122bb514f0 /arch/Kconfig | |
| parent | e22bbb8e97846bfb5a6942a2322f0237ff13df0f (diff) | |
kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
Some architectures build vmlinux with static relocations preserved, but
strip them again from the final vmlinux image. Arch specific tools
consume these static relocations in order to construct relocation tables
for KASLR.
The fact that vmlinux is created, consumed and subsequently updated goes
against the typical, declarative paradigm used by Make, which is based
on rules and dependencies. So as a first step towards cleaning this up,
introduce a Kconfig symbol to declare that the arch wants to consume the
static relocations emitted into vmlinux. This will be wired up further
in subsequent patches.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index b8a4ff365582..101a13fcde8e 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1695,6 +1695,13 @@ config ARCH_HAS_KERNEL_FPU_SUPPORT Architectures that select this option can run floating-point code in the kernel, as described in Documentation/core-api/floating-point.rst. +config ARCH_VMLINUX_NEEDS_RELOCS + bool + help + Whether the architecture needs vmlinux to be built with static + relocations preserved. This is used by some architectures to + construct bespoke relocation tables for KASLR. + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" |