feat: establish bootable new architecture checkpoint

Replace the compressed boot path with a relocatable higher-half RISC-V entry, expand memory and SMP support, and add the driver, TTY, VFS, exec, signal, syscall, initramfs, and self-test infrastructure needed for a bootable kernel checkpoint.

1 files changed, 26 insertions, 1 deletions

diff --git a/na/lib/module.mk b/na/lib/module.mk
index 2cfadf7..0b178f8 100644
--- a/na/lib/module.mk
+++ b/na/lib/module.mk
@@ -1,10 +1,10 @@
 # lib/module.mk
 SRCS_CC += lib/cxx_abi.cc
 SRCS_CC += lib/rbtree.cc
+SRCS_CC += lib/kobject.cc
 SRCS_CC += lib/kprintf.cc
 SRCS_CC += lib/klog.cc
 SRCS_CC += lib/random.cc
-SRCS_CC += lib/decompress_lz4.cc
 SRCS_C  += lib/printf.c
 
 # ============================================================
@@ -39,3 +39,28 @@ MUSL_C_SRCS := $(filter-out $(MUSL_EXCLUDED_C),$(MUSL_ALL_C))
 SRCS_C += $(MUSL_C_SRCS)
 SRCS_S += $(filter %.S,$(MUSL_ASM_SRCS))
 SRCS_s += $(filter %.s,$(MUSL_ASM_SRCS))
+
+# ============================================================
+# libfdt — kernel adapter shims around scripts/dtc/libfdt/.
+#
+# Each shim is two lines:
+#     #include <linux/libfdt_env.h>
+#     #include "../scripts/dtc/libfdt/fdt*.c"
+# matching Linux lib/fdt*.c verbatim.  The compile recipe needs:
+#   - <linux/libfdt_env.h>  reachable via the default -Iinclude path
+#   - -I scripts/dtc/libfdt  so the upstream source's #include <libfdt.h>
+#     and friends resolve to scripts/dtc/libfdt/libfdt.h
+# Overriding CFLAGS_LIBC (which the %.o: %.c rule uses) avoids dragging
+# in libc-shim headers — libfdt is freestanding-compatible and uses
+# only the string functions forward-declared in <linux/libfdt_env.h>.
+# ============================================================
+LIBFDT_FILES := fdt.c fdt_ro.c fdt_wip.c fdt_rw.c fdt_sw.c \
+                fdt_strerror.c fdt_empty_tree.c fdt_addresses.c
+SRCS_C += $(addprefix lib/,$(LIBFDT_FILES))
+
+# Per-target CFLAGS override: plain CFLAGS plus the upstream include dir.
+# Use `=` (recursive) not `:=` because $(CFLAGS) is defined in the top
+# Makefile AFTER this file is included — `:=` would expand it now (empty)
+# and lose -Iinclude, breaking <linux/libfdt_env.h>.
+$(addprefix $(BUILD)/lib/,$(LIBFDT_FILES:.c=.o)): CFLAGS_LIBC = \
+    $(CFLAGS) -I scripts/dtc/libfdt