first commit

2025-02-21 08:39:49 +08:00
commit 6aa7311ce6
80 changed files with 12752 additions and 0 deletions
--- a/kernel/elf.h
+++ b/kernel/elf.h
@@ -0,0 +1,42 @@
+// Format of an ELF executable file
+
+#define ELF_MAGIC 0x464C457FU  // "\x7FELF" in little endian
+
+// File header
+struct elfhdr {
+  uint magic;  // must equal ELF_MAGIC
+  uchar elf[12];
+  ushort type;
+  ushort machine;
+  uint version;
+  uint64 entry;
+  uint64 phoff;
+  uint64 shoff;
+  uint flags;
+  ushort ehsize;
+  ushort phentsize;
+  ushort phnum;
+  ushort shentsize;
+  ushort shnum;
+  ushort shstrndx;
+};
+
+// Program section header
+struct proghdr {
+  uint32 type;
+  uint32 flags;
+  uint64 off;
+  uint64 vaddr;
+  uint64 paddr;
+  uint64 filesz;
+  uint64 memsz;
+  uint64 align;
+};
+
+// Values for Proghdr type
+#define ELF_PROG_LOAD           1
+
+// Flag bits for Proghdr flags
+#define ELF_PROG_FLAG_EXEC      1
+#define ELF_PROG_FLAG_WRITE     2
+#define ELF_PROG_FLAG_READ      4