initial commit

src/elf.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#define ELF_MAGIC_0 0x7f
+#define ELF_MAGIC_1 'E'
+#define ELF_MAGIC_2 'L'
+#define ELF_MAGIC_3 'F'
+
+#define ELFCLASS32 1
+#define ELFDATA2LSB 1
+
+#define SHT_NOBITS 8u
+#define SHT_SYMTAB 2u
+#define SHF_ALLOC 0x2u
+
+#include <stdint.h>
+
+enum {
+    LOAD_OK = 1,
+    LOAD_ERR_OPEN = -1,
+    LOAD_ERR_SMALL_FILE = -2,
+    LOAD_ERR_NOT_ELF = -3,
+    LOAD_ERR_UNSUPPORTED_FORMAT = -4,
+    LOAD_ERR_INVALID_SHT = -5,
+    LOAD_ERR_SHT_OUT_OF_BOUNDS = -6,
+    LOAD_ERR_SECTION_TOO_LARGE = -7,
+    LOAD_ERR_SECTION_FILE_BOUNDS = -8,
+    LOAD_ERR_OOM = -9,
+    LOAD_ERR_SYMTAB_MISSING = -10,
+    LOAD_ERR_STRTAB_INVALID = -11,
+    LOAD_ERR_SYMBOL_NOT_FOUND = -12,
+    LOAD_ERR_SYMBOL_INVALID_SECTION = -13,
+    LOAD_ERR_SYMBOL_OUT_OF_RANGE = -14
+};
+
+uint16_t read_u16_le(const uint8_t* data);
+uint32_t read_u32_le(const uint8_t* data);
+uint32_t align_up(uint32_t value, uint32_t align);
+int load_elf_object_sections(const char* path, uint8_t* memory, uint32_t mem_size);
+int resolve_elf_symbol_memory_offset(const char* path, const char* symbol_name,
+    uint32_t mem_size, uint32_t* out_offset);
+