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?

1 files changed, 17 insertions, 4 deletions

diff --git a/src/uapi/conf.c b/src/uapi/conf.c
index be9abfc..3a45d30 100644
--- a/src/uapi/conf.c
+++ b/src/uapi/conf.c
@@ -16,11 +16,24 @@
 
 #include <arch/proc.h>
 
-/** \todo stack size should really be set on a per-thread basis, and are the
- * conf*-syscalls even necessary? */
-size_t __thread_stack_size = SZ_2M;
-size_t __rpc_stack_size = SZ_512K;
+/** \todo stack size should probably be set on a per-thread basis */
 
+/** Current global thread stack size. */
+static size_t __thread_stack_size = SZ_2M;
+
+/** Current global RPC stack entry size. */
+static size_t __rpc_stack_size = SZ_512K;
+
+
+size_t thread_stack_size()
+{
+	return __thread_stack_size;
+}
+
+size_t rpc_stack_size()
+{
+	return __rpc_stack_size;
+}
 
 /**
  * Configuration parameter read syscall handler.