1 files changed, 54 insertions, 10 deletions
diff --git a/arch/x86_64/include/arch/memory/multiboot.hpp b/arch/x86_64/include/arch/memory/multiboot.hpp
index c808213..f1f0613 100644
--- a/arch/x86_64/include/arch/memory/multiboot.hpp
+++ b/arch/x86_64/include/arch/memory/multiboot.hpp
@@ -113,18 +113,62 @@ namespace teachos::arch::memory
     PRE_INITALIZATION_FUNCTION_ARRAY
   };
 
+  /**
+   * https://docs.oracle.com/cd/E19683-01/816-1386/chapter6-94076/index.html
+   */
+  class elf_section_flags
+  {
+  public:
+    elf_section_flags(uint64_t flags)
+        : flags(flags)
+    {
+      // Nothing to do
+    }
+
+    auto writeable() -> bool { return is_bit_set(0); }
+
+    auto occupies_memory() -> bool { return is_bit_set(1); }
+
+    auto is_executable() -> bool { return is_bit_set(2); }
+
+    auto contains_duplicate_data() -> bool { return is_bit_set(4); }
+
+    auto contains_strings() -> bool { return is_bit_set(5); }
+
+    auto section_header_info_is_section_header_table_index() -> bool { return is_bit_set(6); }
+
+    auto preserve_ordering_after_combination() -> bool { return is_bit_set(7); }
+
+    auto requires_special_os_processing() -> bool { return is_bit_set(8); }
+
+    auto is_section_group_member() -> bool { return is_bit_set(9); }
+
+    auto holds_thread_local_data() -> bool { return is_bit_set(10); }
+
+    auto is_compressed() -> bool { return is_bit_set(11); }
+
+    auto has_special_ordering_requirements() -> bool { return is_bit_set(30); }
+
+    auto is_excluded_unless_referenced_or_allocated() -> bool { return is_bit_set(31); }
+
+  private:
+    auto is_bit_set(uint8_t index) -> bool { return flags[index] == 1; }
+
+    std::bitset<64U> flags;
+  };
+
   struct elf_section_header
   {
-    uint32_t sh_name;          /* Section name (string tbl index) */
-    elf_section_type sh_type;  /* Section type */
-    std::bitset<64U> sh_flags; /* Section flags */
-    uint64_t sh_addr;          /* Section virtual addr at execution */
-    uint64_t sh_offset;        /* Section file offset */
-    uint64_t sh_size;          /* Section size in bytes */
-    uint32_t sh_link;          /* Link to another section */
-    uint32_t sh_info;          /* Additional section information */
-    uint64_t sh_addralign;     /* Section alignment */
-    uint64_t sh_entsize;       /* Entry size if section holds table */
+    uint32_t sh_name;           /* Section name (string tbl index) */
+    elf_section_type sh_type;   /* Section type */
+    elf_section_flags sh_flags; /* Section flags */
+    uint64_t sh_addr;           /* Section virtual addr at execution */
+    uint64_t sh_offset;         /* Section file offset */
+    uint64_t sh_size;           /* Section size in bytes */
+    uint32_t sh_link;           /* Link to another section */
+    uint32_t sh_info;           /* Additional section information */
+    uint64_t sh_addralign;      /* Section alignment */
+    uint64_t sh_entsize;        /* Entry size if section holds table */
   };
 
   /**