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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 /scripts | |
| 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 'scripts')
| -rw-r--r-- | scripts/makefile | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/scripts/makefile b/scripts/makefile index 26b33ad..aa0bcac 100644 --- a/scripts/makefile +++ b/scripts/makefile @@ -47,7 +47,7 @@ COMPILER != [ "$(LLVM)" != "0" ] \ || echo $(CROSS_COMPILE)gcc -OBFLAGS = -ffreestanding -nostdlib -static -fno-pie -std=c17 -g +OBFLAGS = -ffreestanding -nostdlib -static -fpic -fno-pie -std=c17 -g WARNFLAGS = -Wall -Wextra -Wvla ARCH_CFLAGS = -D$(ARCH) @@ -61,8 +61,7 @@ LINK_FLAGS = $(LDFLAGS) $(ARCH_LDFLAGS) INCLUDE_FLAGS = -I include -include config.h -include arch/$(ARCH)/config.h # This makes sure .bss is loaded into the binary -OBJCOPY_FLAGS ?= -Obinary -R .garbage \ - --set-section-flags .bss=alloc,load,contents +OBJCOPY_FLAGS ?= -Obinary -R .garbage COMPILE = $(COMPILER) \ $(COMPILE_FLAGS) $(DEPFLAGS) $(INCLUDE_FLAGS) |