From 1767d390fbf3d0c65389de46caf0b6d43ef3b6ad Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 10 Jul 2026 11:24:56 +0800
Subject: 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.
---
 na/scripts/gen_reloc.py | 224 ------------------------------------------------
 1 file changed, 224 deletions(-)
 delete mode 100644 na/scripts/gen_reloc.py

(limited to 'na/scripts/gen_reloc.py')

diff --git a/na/scripts/gen_reloc.py b/na/scripts/gen_reloc.py
deleted file mode 100644
index 6709e17..0000000
--- a/na/scripts/gen_reloc.py
+++ /dev/null
@@ -1,224 +0,0 @@
-#!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (C) 2026 Richard Qin
-
-import argparse
-import struct
-import sys
-
-ELF_MAGIC = b"\x7fELF"
-ELFCLASS64 = 2
-ELFDATA2LSB = 1
-EM_RISCV = 243
-SHT_SYMTAB = 2
-SHT_RELA = 4
-PT_LOAD = 1
-
-R_RISCV_64 = 2
-R_RISCV_RELATIVE = 3
-
-RELOC_MAGIC = 0x4C554D45524C4F43  # "LUMERLOC"
-RELOC_VERSION = 1
-RELOC_ARCH_RISCV = 1
-
-
-def read_struct(fmt, data, offset):
-    size = struct.calcsize(fmt)
-    return struct.unpack_from(fmt, data, offset), size
-
-
-def parse_elf_header(data):
-    if data[:4] != ELF_MAGIC:
-        raise ValueError("not an ELF file")
-    ei_class = data[4]
-    ei_data = data[5]
-    if ei_class != ELFCLASS64 or ei_data != ELFDATA2LSB:
-        raise ValueError("unsupported ELF class/data")
-    fmt = "<16sHHIQQQIHHHHHH"
-    (e_ident, e_type, e_machine, e_version, e_entry, e_phoff, e_shoff,
-     e_flags, e_ehsize, e_phentsize, e_phnum, e_shentsize, e_shnum,
-     e_shstrndx), _ = read_struct(fmt, data, 0)
-    return {
-        "e_machine": e_machine,
-        "e_phoff": e_phoff,
-        "e_phentsize": e_phentsize,
-        "e_phnum": e_phnum,
-        "e_shoff": e_shoff,
-        "e_shentsize": e_shentsize,
-        "e_shnum": e_shnum,
-        "e_shstrndx": e_shstrndx,
-    }
-
-
-def parse_program_headers(data, ehdr):
-    phdrs = []
-    fmt = "<IIQQQQQQ"
-    for i in range(ehdr["e_phnum"]):
-        off = ehdr["e_phoff"] + i * ehdr["e_phentsize"]
-        (p_type, p_flags, p_offset, p_vaddr, p_paddr, p_filesz, p_memsz,
-         p_align), _ = read_struct(fmt, data, off)
-        phdrs.append({
-            "p_type": p_type,
-            "p_offset": p_offset,
-            "p_vaddr": p_vaddr,
-            "p_filesz": p_filesz,
-            "p_memsz": p_memsz,
-        })
-    return phdrs
-
-
-def parse_section_headers(data, ehdr):
-    shdrs = []
-    fmt = "<IIQQQQIIQQ"
-    for i in range(ehdr["e_shnum"]):
-        off = ehdr["e_shoff"] + i * ehdr["e_shentsize"]
-        (sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size,
-         sh_link, sh_info, sh_addralign, sh_entsize), _ = read_struct(fmt, data, off)
-        shdrs.append({
-            "sh_name": sh_name,
-            "sh_type": sh_type,
-            "sh_addr": sh_addr,
-            "sh_offset": sh_offset,
-            "sh_size": sh_size,
-            "sh_link": sh_link,
-            "sh_entsize": sh_entsize,
-        })
-    return shdrs
-
-
-def get_strtab(data, shdrs, idx):
-    sh = shdrs[idx]
-    return data[sh["sh_offset"]:sh["sh_offset"] + sh["sh_size"]]
-
-
-def get_section_name(strtab, sh_name):
-    end = strtab.find(b"\x00", sh_name)
-    if end < 0:
-        return ""
-    return strtab[sh_name:end].decode("ascii", errors="ignore")
-
-
-def find_symbol(data, shdrs, name):
-    for i, sh in enumerate(shdrs):
-        if sh["sh_type"] != SHT_SYMTAB:
-            continue
-        strtab = get_strtab(data, shdrs, sh["sh_link"])
-        entsize = sh["sh_entsize"] or 24
-        count = sh["sh_size"] // entsize
-        for j in range(count):
-            off = sh["sh_offset"] + j * entsize
-            (st_name, st_info, st_other, st_shndx, st_value, st_size), _ = read_struct(
-                "<IBBHQQ", data, off
-            )
-            sym_name = get_section_name(strtab, st_name)
-            if sym_name == name:
-                return st_value
-    return None
-
-
-def read_symtab(data, shdrs, idx):
-    sh = shdrs[idx]
-    entsize = sh["sh_entsize"] or 24
-    count = sh["sh_size"] // entsize
-    syms = []
-    for j in range(count):
-        off = sh["sh_offset"] + j * entsize
-        (st_name, st_info, st_other, st_shndx, st_value, st_size), _ = read_struct(
-            "<IBBHQQ", data, off
-        )
-        syms.append((st_value, st_size, st_info, st_shndx))
-    return syms
-
-
-def vaddr_in_load(vaddr, phdrs, size):
-    for ph in phdrs:
-        if ph["p_type"] != PT_LOAD:
-            continue
-        start = ph["p_vaddr"]
-        end = ph["p_vaddr"] + ph["p_memsz"]
-        if vaddr >= start and vaddr + size <= end:
-            return True
-    return False
-
-
-def main():
-    ap = argparse.ArgumentParser()
-    ap.add_argument("--elf", required=True)
-    ap.add_argument("--out", required=True)
-    args = ap.parse_args()
-
-    data = open(args.elf, "rb").read()
-    ehdr = parse_elf_header(data)
-    if ehdr["e_machine"] != EM_RISCV:
-        raise ValueError("only EM_RISCV supported")
-
-    phdrs = parse_program_headers(data, ehdr)
-    shdrs = parse_section_headers(data, ehdr)
-
-    link_base = find_symbol(data, shdrs, "_start")
-    if link_base is None:
-        raise ValueError("_start symbol not found")
-
-    image_end = find_symbol(data, shdrs, "__lume_image_end")
-    if image_end is None:
-        raise ValueError("__lume_image_end symbol not found")
-    image_size = image_end - link_base
-
-    entries = []
-    for sh in shdrs:
-        if sh["sh_type"] != SHT_RELA:
-            continue
-        if sh["sh_link"] >= len(shdrs):
-            continue
-        symtab = read_symtab(data, shdrs, sh["sh_link"])
-        entsize = sh["sh_entsize"] or 24
-        count = sh["sh_size"] // entsize
-        for i in range(count):
-            off = sh["sh_offset"] + i * entsize
-            (r_offset, r_info, r_addend), _ = read_struct("<QQq", data, off)
-            r_type = r_info & 0xFFFFFFFF
-            r_sym = r_info >> 32
-            if r_type not in (R_RISCV_RELATIVE, R_RISCV_64):
-                continue
-            if r_offset < link_base or r_offset >= link_base + image_size:
-                continue
-            if not vaddr_in_load(r_offset, phdrs, 8):
-                continue
-            ent_offset = r_offset - link_base
-            if r_type == R_RISCV_RELATIVE:
-                ent_addend = r_addend
-                ent_type = 1
-            else:
-                sym_val = 0
-                if r_sym < len(symtab):
-                    sym_val = symtab[r_sym][0]
-                ent_addend = sym_val + r_addend
-                if ent_addend < link_base or ent_addend >= link_base + image_size:
-                    continue
-                ent_type = 2
-            entries.append((ent_offset, ent_addend, ent_type))
-
-    header = struct.pack(
-        "<QHHIII",
-        RELOC_MAGIC,
-        RELOC_VERSION,
-        RELOC_ARCH_RISCV,
-        24,
-        len(entries),
-        0,
-    )
-
-    with open(args.out, "wb") as f:
-        f.write(header)
-        for off, add, typ in entries:
-            f.write(struct.pack("<QQII", off, add, typ, 0))
-
-    return 0
-
-
-if __name__ == "__main__":
-    try:
-        sys.exit(main())
-    except Exception as e:
-        print("gen_reloc: " + str(e), file=sys.stderr)
-        sys.exit(1)
-- 
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