Moved ELF structures to C header

2021-04-12 01:21:59 -05:00
parent e235e9bad2
commit 74fe6e1a58
3 changed files with 119 additions and 186 deletions
--- a/include/elf.h
+++ b/include/elf.h
@@ -0,0 +1,119 @@
+#pragma once
+
+#include "types/physaddr.h"
+#include <stdint.h>
+
+const uint32_t elf_magic_number = 0x464c457f;
+
+enum elf_endianness_t
+{
+    ELF_LITTLE_ENDIAN = 1,
+    ELF_BIG_ENDIAN = 2
+};
+
+enum elf_isa_t
+{
+    ELF_ISA_NA = 0x00,
+    ELF_ISA_x86 = 0x03,
+    ELF_ISA_MIPS = 0x08,
+    ELF_ISA_PPC = 0x14,
+    ELF_ISA_PPC64 = 0x15,
+    ELF_ISA_ARM = 0x28,
+    ELF_ISA_x86_64 = 0x3E,
+    ELF_ISA_AARCH64 = 0xB7
+};
+
+enum elf_segment_type_t
+{
+    ELF_UNUSED = 0,
+    ELF_LOAD = 1,
+    ELF_DYNAMIC = 2
+};
+
+struct elf_file_header_t
+{
+    uint32_t magic;
+    char size;
+    char endianness;
+    char version;
+    char abi;
+    char abi_version;
+    char reserved[7];
+    uint16_t type;
+    uint16_t machine;
+    uint32_t _version;
+    void *entry;
+#if defined __i386__ || defined __arm__
+    uint32_t phoffset;
+    uint32_t shoffset;
+#elif defined __x86_64__ || defined __aarch64__
+    uint64_t phoffset;
+    uint64_t shoffset;
+#endif
+    uint32_t flags;
+    uint16_t header_size;
+    uint16_t phsize;
+    uint16_t phcount;
+    uint16_t shsize;
+    uint16_t shcount;
+    uint16_t shstrndx;
+};
+
+struct elf_program_header_t
+{
+    uint32_t type;
+#if defined __i386__ || defined __arm__
+    uint32_t offset;
+    void *vaddr;
+    physaddr_t paddr;
+    uint32_t filesize;
+    uint32_t memsize;
+    uint32_t flags;
+    uint32_t align;
+#elif defined __x86_64__ || defined __aarch64__
+    uint32_t flags;
+    uint64_t offset;
+    void *vaddr;
+    physaddr_t paddr;
+    uint64_t filesize;
+    uint64_t memsize;
+    uint64_t align;
+#endif
+};
+
+struct elf_section_header_t
+{
+    uint32_t name;
+    uint32_t type;
+#if defined __i386__ || defined __arm__
+    uint32_t flags;
+    void *addr;
+    uint32_t offset;
+    uint32_t size;
+    uint32_t link;
+    uint32_t info;
+    uint32_t align;
+    uint32_t entry_size;
+#elif defined __x86_64__ || defined __aarch64__
+    uint64_t flags;
+    void *addr;
+    uint64_t offset;
+    uint64_t size;
+    uint32_t link;
+    uint32_t info;
+    uint64_t align;
+    uint64_t entry_size;
+#endif
+};
+
+#if defined __i386__
+    static const elf_isa_t HOST_ISA = ELF_ISA_x86;
+#elif defined __x86_64__
+    static const elf_isa_t HOST_ISA = ELF_ISA_x86_64;
+#elif defined __arm__
+    static const elf_isa_t HOST_ISA = ELF_ISA_ARM;
+#elif defined __aarch64__
+    static const elf_isa_t HOST_ISA = ELF_ISA_AARCH64;
+#endif
+
+int load_elf_executable(void *file);