feat: scheduling, usermode, shell

2026-02-17 19:17:01 +01:00
parent 20fa8a9be2
commit 605fbcbe42
46 changed files with 2622 additions and 98 deletions
@@ -0,0 +1,49 @@
+/*
+    * ElfLoader.hpp
+    * ELF64 binary loader for user-mode processes
+    * Copyright (c) 2025 Daniel Hammer
+*/
+
+#pragma once
+#include <cstdint>
+
+namespace Sched {
+
+    struct Elf64Header {
+        uint8_t  e_ident[16];
+        uint16_t e_type;
+        uint16_t e_machine;
+        uint32_t e_version;
+        uint64_t e_entry;
+        uint64_t e_phoff;
+        uint64_t e_shoff;
+        uint32_t e_flags;
+        uint16_t e_ehsize;
+        uint16_t e_phentsize;
+        uint16_t e_phnum;
+        uint16_t e_shentsize;
+        uint16_t e_shnum;
+        uint16_t e_shstrndx;
+    };
+
+    struct Elf64ProgramHeader {
+        uint32_t p_type;
+        uint32_t p_flags;
+        uint64_t p_offset;
+        uint64_t p_vaddr;
+        uint64_t p_paddr;
+        uint64_t p_filesz;
+        uint64_t p_memsz;
+        uint64_t p_align;
+    };
+
+    static constexpr uint32_t PT_LOAD    = 1;
+    static constexpr uint16_t ET_EXEC    = 2;
+    static constexpr uint16_t EM_X86_64  = 62;
+
+    // Load an ELF64 binary into a per-process address space.
+    // pml4Phys = physical address of the process's PML4.
+    // Returns the entry point address, or 0 on failure.
+    uint64_t ElfLoad(const char* vfsPath, uint64_t pml4Phys);
+
+}