reorganization: first steps

1 files changed, 188 insertions, 0 deletions

diff --git a/src/libc/elf.h b/src/libc/elf.h
new file mode 100644
index 0000000..8dc6242
--- /dev/null
+++ b/src/libc/elf.h
@@ -0,0 +1,188 @@
+/* shamelessly stolen from https://github.com/adachristine/sophia/tree/main/api/elf */
+#pragma once
+#include <stdint.h>
+
+typedef uint8_t Elf_Byte;
+
+#define EI_MAG0 0
+#define EI_MAG1 1
+#define EI_MAG2 2
+#define EI_MAG3 3
+#define EI_CLASS 4
+#define EI_DATA 5
+#define EI_VERSION 6
+#define EI_OSABI 7
+#define EI_ABIVERSION 8
+#define EI_PAD 9
+#define EI_NIDENT 16
+
+#define ELFMAG0 0x7f
+#define ELFMAG1 'E'
+#define ELFMAG2 'L'
+#define ELFMAG3 'F'
+
+#define ELFCLASSNONE 0
+#define ELFCLASS32 1
+#define ELFCLASS64 2
+
+#define ELFDATANONE 0
+#define ELFDATA2LSB 1
+#define ELFDATA2MSB 2
+
+#define EI_VERSION 6
+#define EV_NONE 0
+#define EV_CURRENT 1
+
+#define ELFOSABI_NONE 0
+#define ELFOSABI_SYSV EI_OSABI_NONE
+
+#define ET_NONE 0
+#define ET_REL 1
+#define ET_EXEC 2
+#define ET_DYN 3
+#define ET_CORE 4
+#define ET_LOOS 0xfe00
+#define ET_HIOS 0xfeff
+
+#define EM_NONE 0
+
+#define PT_NULL 0
+#define PT_LOAD 1
+#define PT_DYNAMIC 2
+
+#define PF_X 0x01
+#define PF_W 0x02
+#define PF_R 0x04
+
+#define SHT_NULL 0
+#define SHT_PROGITS 1
+#define SHT_SYMTAB 2
+#define SHT_STRTAB 3
+#define SHT_RELA 4
+#define SHT_HASH 5
+#define SHT_DYNAMIC 6
+
+#define SHF_WRITE 0x1
+#define SHF_ALLOC 0x2
+#define SHF_EXEC  0x4
+#define SHF_MERGE 0x10
+#define SHF_STRINGS 0x20
+
+#define DT_NULL 0
+#define DT_NEEDED 1
+#define DT_PLTRELSZ 2
+#define DT_PLTGOT 3
+#define DT_HASH 4
+#define DT_STRTAB 5
+#define DT_SYMTAB 6
+#define DT_RELA 7
+#define DT_RELASZ 8
+#define DT_RELAENT 9
+#define DT_STRSZ 10
+#define DT_SYMENT 11
+#define DT_JMPREL 0x17
+
+typedef uint64_t Elf64_Addr;
+typedef uint64_t Elf64_Off;
+typedef uint16_t Elf64_Section;
+typedef uint16_t Elf64_Versym;
+typedef uint16_t Elf64_Half;
+typedef int32_t Elf64_Sword;
+typedef uint32_t Elf64_Word;
+typedef int64_t Elf64_Sxword;
+typedef uint64_t Elf64_Xword;
+
+typedef struct Elf64_Ehdr Elf64_Ehdr;
+typedef struct Elf64_Phdr Elf64_Phdr;
+typedef struct Elf64_Shdr Elf64_Shdr;
+typedef struct Elf64_Sym Elf64_Sym;
+typedef struct Elf64_Dyn Elf64_Dyn;
+
+typedef struct Elf64_Rel Elf64_Rel;
+typedef struct Elf64_Rela Elf64_Rela;
+
+#define EM_X86_64 62
+
+struct Elf64_Ehdr
+{
+    Elf_Byte e_ident[EI_NIDENT];
+    Elf64_Half e_type;
+    Elf64_Half e_machine;
+    Elf64_Word e_version;
+    Elf64_Addr e_entry;
+    Elf64_Off e_phoff;
+    Elf64_Off e_shoff;
+    Elf64_Word e_flags;
+    Elf64_Half e_ehsize;
+    Elf64_Half e_phentsize;
+    Elf64_Half e_phnum;
+    Elf64_Half e_shentsize;
+    Elf64_Half e_shnum;
+    Elf64_Half e_shstrndx;
+};
+
+struct Elf64_Phdr
+{
+    Elf64_Word p_type;
+    Elf64_Word p_flags;
+    Elf64_Off p_offset;
+    Elf64_Addr p_vaddr;
+    Elf64_Addr p_paddr;
+    Elf64_Xword p_filesz;
+    Elf64_Xword p_memsz;
+    Elf64_Xword p_align;
+};
+
+struct Elf64_Shdr
+{
+    Elf64_Word sh_name;
+    Elf64_Word sh_type;
+    Elf64_Xword sh_flags;
+    Elf64_Addr sh_addr;
+    Elf64_Off sh_offset;
+    Elf64_Xword sh_size;
+    Elf64_Word sh_link;
+    Elf64_Word sh_info;
+    Elf64_Off sh_addralign;
+    Elf64_Xword sh_entsize;
+};
+
+struct Elf64_Sym
+{
+    Elf64_Word st_name;
+    Elf_Byte st_info;
+    Elf_Byte st_other;
+    Elf64_Half st_shndx;
+    Elf64_Addr st_value;
+    Elf64_Xword st_size;
+};
+
+struct Elf64_Dyn
+{
+    Elf64_Xword d_tag;
+    union
+    {
+        Elf64_Xword d_val;
+        Elf64_Addr d_ptr;
+    };
+};
+
+#define ELF64_R_SYM(info) ((info)>>32)
+#define ELF64_R_TYPE(info) ((Elf64_Word)(info))
+#define ELF64_R_INFO(sym, type) (((Elf64_Xword)(sym)<<32)+(Elf64_Xword)(type))
+
+#define R_X86_64_JUMP_SLOT 7
+#define R_X86_64_RELATIVE 8
+
+struct Elf64_Rel
+{
+    Elf64_Addr r_offset;
+    Elf64_Xword r_info;
+};
+
+struct Elf64_Rela
+{
+    Elf64_Addr r_offset;
+    Elf64_Xword r_info;
+    Elf64_Sxword r_addend;
+};