Allow building with clang

+ Release mode is sort of broken, as lto doesn't work with linker
  relaxation and turning the relaxation off causes issues with the jump
  from init to kernel (as I've currently implemented it, could probably
  be fixed with a manual jump from assembly, I'll add it to my TODO
  list)

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/riscv64/kernel/proc.c b/arch/riscv64/kernel/proc.c
new file mode 100644
index 0000000..b696912
--- /dev/null
+++ b/arch/riscv64/kernel/proc.c
@@ -0,0 +1,15 @@
+#include <apos/tcb.h>
+#include <apos/elf.h>
+#include <csr.h>
+
+void jump_to_userspace(struct tcb *t, int argc, char **argv)
+{
+	csr_write(CSR_SEPC, t->entry);
+	__asm__ volatile ("mv sp, %0\n" : "=r" (t->proc_stack) :: "memory");
+	__asm__ volatile ("sret\n" ::: "memory");
+}
+
+void return_to_userspace(struct tcb *t)
+{
+	/* lol */
+}