Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/backtrace/src/symbolize/gimli/libs_libnx.rs

@@ -0,0 +1,27 @@
+use super::{Library, LibrarySegment, Vec};
+
+// DevkitA64 doesn't natively support debug info, but the build system will
+// place debug info at the path `romfs:/debug_info.elf`.
+pub(super) fn native_libraries() -> Vec<Library> {
+    extern "C" {
+        static __start__: u8;
+    }
+
+    let bias = unsafe { &__start__ } as *const u8 as usize;
+
+    let mut ret = Vec::new();
+    let mut segments = Vec::new();
+    segments.push(LibrarySegment {
+        stated_virtual_memory_address: 0,
+        len: usize::max_value() - bias,
+    });
+
+    let path = "romfs:/debug_info.elf";
+    ret.push(Library {
+        name: path.into(),
+        segments,
+        bias,
+    });
+
+    ret
+}