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This commit is contained in:
Alex
2022-12-21 00:43:51 +02:00
parent 684b76a1ca
commit a677f3c159
62 changed files with 471 additions and 448 deletions
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30
Execute/Parse.cpp
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@ -71,7 +71,7 @@ namespace Execute
/* Originally from https://wiki.osdev.org/ELF_Tutorial */
static inline Elf64_Shdr *GetElfSheader(Elf64_Ehdr *Header) { return (Elf64_Shdr *)((uint64_t)Header + Header->e_shoff); }
static inline Elf64_Shdr *GetElfSheader(Elf64_Ehdr *Header) { return (Elf64_Shdr *)((uintptr_t)Header + Header->e_shoff); }
static inline Elf64_Shdr *GetElfSection(Elf64_Ehdr *Header, uint64_t Index) { return &GetElfSheader(Header)[Index]; }
static inline char *GetElfStringTable(Elf64_Ehdr *Header)
@ -81,7 +81,7 @@ namespace Execute
return (char *)Header + GetElfSection(Header, Header->e_shstrndx)->sh_offset;
}
static inline char *elf_lookup_string(Elf64_Ehdr *Header, uint64_t Offset)
static inline char *elf_lookup_string(Elf64_Ehdr *Header, uintptr_t Offset)
{
char *StringTable = GetElfStringTable(Header);
if (StringTable == nullptr)
@ -111,17 +111,17 @@ namespace Execute
if (SymbolTable == nullptr || StringTable == nullptr)
return nullptr;
for (uint64_t i = 0; i < (SymbolTable->sh_size / sizeof(Elf64_Sym)); i++)
for (size_t i = 0; i < (SymbolTable->sh_size / sizeof(Elf64_Sym)); i++)
{
Symbol = (Elf64_Sym *)((uint64_t)Header + SymbolTable->sh_offset + (i * sizeof(Elf64_Sym)));
String = (char *)((uint64_t)Header + StringTable->sh_offset + Symbol->st_name);
Symbol = (Elf64_Sym *)((uintptr_t)Header + SymbolTable->sh_offset + (i * sizeof(Elf64_Sym)));
String = (char *)((uintptr_t)Header + StringTable->sh_offset + Symbol->st_name);
if (strcmp(String, Name) == 0)
return (void *)Symbol->st_value;
}
return nullptr;
}
static uint64_t ELFGetSymbolValue(Elf64_Ehdr *Header, uint64_t Table, uint32_t Index)
static uintptr_t ELFGetSymbolValue(Elf64_Ehdr *Header, uint64_t Table, uint32_t Index)
{
if (Table == SHN_UNDEF || Index == SHN_UNDEF)
return 0;
@ -154,14 +154,14 @@ namespace Execute
}
}
else
return (uint64_t)Target;
return (uintptr_t)Target;
}
else if (Symbol->st_shndx == SHN_ABS)
return Symbol->st_value;
else
{
Elf64_Shdr *Target = GetElfSection(Header, Symbol->st_shndx);
return (uint64_t)Header + Symbol->st_value + Target->sh_offset;
return (uintptr_t)Header + Symbol->st_value + Target->sh_offset;
}
}
@ -181,8 +181,8 @@ namespace Execute
memset(Buffer, 0, Section->sh_size);
Memory::Virtual pva = Memory::Virtual(/* TODO TODO TODO TODO TODO TODO */);
for (uint64_t i = 0; i < TO_PAGES(Section->sh_size); i++)
pva.Map((void *)((uint64_t)Buffer + (i * PAGE_SIZE)), (void *)((uint64_t)Buffer + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
for (size_t i = 0; i < TO_PAGES(Section->sh_size); i++)
pva.Map((void *)((uintptr_t)Buffer + (i * PAGE_SIZE)), (void *)((uintptr_t)Buffer + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
Section->sh_offset = (uint64_t)Buffer - (uint64_t)Header;
debug("Section %ld", Section->sh_size);
@ -190,17 +190,17 @@ namespace Execute
}
}
for (uint64_t i = 0; i < Header->e_shnum; i++)
for (size_t i = 0; i < Header->e_shnum; i++)
{
Elf64_Shdr *Section = &shdr[i];
if (Section->sh_type == SHT_REL)
{
for (uint64_t Index = 0; Index < Section->sh_size / Section->sh_entsize; Index++)
for (size_t Index = 0; Index < Section->sh_size / Section->sh_entsize; Index++)
{
Elf64_Rel *RelTable = &((Elf64_Rel *)((uint64_t)Header + Section->sh_offset))[Index];
Elf64_Rel *RelTable = &((Elf64_Rel *)((uintptr_t)Header + Section->sh_offset))[Index];
Elf64_Shdr *Target = GetElfSection(Header, Section->sh_info);
uint64_t *RelAddress = (uint64_t *)(((uint64_t)Header + Target->sh_offset) + RelTable->r_offset);
uintptr_t *RelAddress = (uintptr_t *)(((uintptr_t)Header + Target->sh_offset) + RelTable->r_offset);
uint64_t SymbolValue = 0;
if (ELF64_R_SYM(RelTable->r_info) != SHN_UNDEF)
@ -218,7 +218,7 @@ namespace Execute
*RelAddress = DO_64_64(SymbolValue, *RelAddress);
break;
case R_386_PC32:
*RelAddress = DO_64_PC32(SymbolValue, *RelAddress, (uint64_t)RelAddress);
*RelAddress = DO_64_PC32(SymbolValue, *RelAddress, (uintptr_t)RelAddress);
break;
default:
error("Unsupported relocation type: %d", ELF64_R_TYPE(RelTable->r_info));