Wrote stack unwinder. NEEDTO: fix NoUnwindInfo

Probably incorrect PC was set.

kernel/src/std/unwind/eh_info.rs

@@ -21,15 +21,15 @@ use crate::{println_log, std::elf::ElfReader};
 /// and will later be extended as required.
 pub struct EhInfo {
     /// A set of base addresses used for relative addressing.
-    base_addrs: BaseAddresses,
+    pub base_addrs: BaseAddresses,
     /// The parsed `.eh_frame_hdr` section.
-    hdr: &'static ParsedEhFrameHdr<EndianSlice<'static, LittleEndian>>,
+    pub hdr: &'static ParsedEhFrameHdr<EndianSlice<'static, LittleEndian>>,
     /// The lookup table in the parsed `.eh_frame_hdr` section.
     /// This is a binary search table, it is optional but should be present as
     /// we are linking with LLD(?) \[needs citation].
-    hdr_table: EhHdrTable<'static, EndianSlice<'static, LittleEndian>>,
+    pub hdr_table: EhHdrTable<'static, EndianSlice<'static, LittleEndian>>,
     /// The parsed `.eh_frame` containing the CFIs (call frame information).
-    eh_frame: EhFrame<EndianSlice<'static, LittleEndian>>,
+    pub eh_frame: EhFrame<EndianSlice<'static, LittleEndian>>,
 }
 
 /// Stores the [ElfReader] struct for this ELF file.