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| author | Kimplul <kimi.h.kuparinen@gmail.com> | 2024-07-08 17:43:59 +0300 |
|---|---|---|
| committer | Kimplul <kimi.h.kuparinen@gmail.com> | 2024-07-08 18:04:03 +0300 |
| commit | e134202611a50b358c147c92bfb8a7f443030b8b (patch) | |
| tree | ac7c31824adcf41a63e4d2c5e141f5149cc55b1a /arch/riscv64/source.mk | |
| parent | 7e828ec1e1479ff9a8afe845539d08ca0dfada5f (diff) | |
| download | kmi-e134202611a50b358c147c92bfb8a7f443030b8b.tar.gz kmi-e134202611a50b358c147c92bfb8a7f443030b8b.zip | |
fix LLVM
+ Anything extern is right out as LLVM doesn't produce correct code for
them. Maybe if I added some extra attributes but I'm skeptical.
Replaced with static variables and getters/setters.
+ Inline ASM is apparently a bit buggy, so use an assembly stub when jumping to init.
+ Minimize work done in main() to minimize chance of LLVM doing something silly.
Still not 100% certain that I shouldn't just write the main() as an assembly stub
in arch/riscv64 to be absolutely sure everything works as intended.
+ Make .kernel.start section SHF_ALLOC, otherwise lld complains about
pc-relative addressing
Probably some other stuff as well that I'm forgetting right now. But at least with
LLVM14 LTO seems to work, which is pretty cool?
Diffstat (limited to 'arch/riscv64/source.mk')
| -rw-r--r-- | arch/riscv64/source.mk | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/arch/riscv64/source.mk b/arch/riscv64/source.mk index 6e72c85..0c10bbc 100644 --- a/arch/riscv64/source.mk +++ b/arch/riscv64/source.mk @@ -1,15 +1,9 @@ KERNEL_LOCAL != echo $(ARCH_SOURCE)/kernel/*.[cS] -KERNEL_SOURCES += $(KERNEL_LOCAL) -INIT_SOURCES += $(ARCH_SOURCE)/init/*.[cS] +KERNEL_SOURCES := $(KERNEL_SOURCES) $(KERNEL_LOCAL) # this doesn't work for rv32, but fine for now */ ARCH_CFLAGS := $(ARCH_CFLAGS) -mcmodel=medany -# oof, LLVM's riscv support has become better since I last looked into -# it, but for some reason LTO still causes a crash. Meaning it has to be -# disabled again, though for a different reason than last time -OPTFLAGS != [ "$(LLVM)" != "0" ] && echo $(OPTFLAGS:-flto=) || echo $(OPTFLAGS) - run: $(ARCH_SOURCE)/conf/mkimage.sh $(ARCH) |