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| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2023-05-26 17:46:30 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-05-31 07:07:07 -0700 |
| commit | 8dc2a7e8027fbeca0c7df81d4c82e735a59b5741 (patch) | |
| tree | 2972f6e851fe076e8216b9581bdbabbd553798b7 | |
| parent | ed309ce522185583b163bd0c74f0d9f299fe1826 (diff) | |
| download | iio-8dc2a7e8027fbeca0c7df81d4c82e735a59b5741.tar.gz | |
riscv: Fix relocatable kernels with early alternatives using -fno-pie
Early alternatives are called with the mmu disabled, and then should not
access any global symbols through the GOT since it requires relocations,
relocations that we do before but *virtually*. So only use medany code
model for this early code.
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com> # booted on nezha & unmatched
Fixes: 39b33072941f ("riscv: Introduce CONFIG_RELOCATABLE")
Link: https://lore.kernel.org/r/20230526154630.289374-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/errata/Makefile | 4 | ||||
| -rw-r--r-- | arch/riscv/kernel/Makefile | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/riscv/errata/Makefile b/arch/riscv/errata/Makefile index a1055965fbee6..7b2637c8c3326 100644 --- a/arch/riscv/errata/Makefile +++ b/arch/riscv/errata/Makefile @@ -1,2 +1,6 @@ +ifdef CONFIG_RELOCATABLE +KBUILD_CFLAGS += -fno-pie +endif + obj-$(CONFIG_ERRATA_SIFIVE) += sifive/ obj-$(CONFIG_ERRATA_THEAD) += thead/ diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile index fbdccc21418a5..153864e4f3996 100644 --- a/arch/riscv/kernel/Makefile +++ b/arch/riscv/kernel/Makefile @@ -23,6 +23,10 @@ ifdef CONFIG_FTRACE CFLAGS_REMOVE_alternative.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_cpufeature.o = $(CC_FLAGS_FTRACE) endif +ifdef CONFIG_RELOCATABLE +CFLAGS_alternative.o += -fno-pie +CFLAGS_cpufeature.o += -fno-pie +endif ifdef CONFIG_KASAN KASAN_SANITIZE_alternative.o := n KASAN_SANITIZE_cpufeature.o := n |