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Update ELF interpreter

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This commit is contained in:
Alex 2023-03-31 17:39:01 +03:00
parent b63459b7f3
commit 7234de7920
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
2 changed files with 176 additions and 222 deletions
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31
libc/ElfInterpreter/helper.c
View File

@ -1,31 +0,0 @@
#include "elf.h"
struct Elf64_Dyn *ELFGetDynamicTag(void *ElfFile, enum DynamicArrayTags Tag)
{
Elf64_Ehdr *ELFHeader = (Elf64_Ehdr *)ElfFile;
Elf64_Phdr ItrProgramHeader;
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
memcpy(&ItrProgramHeader, (__UINT8_TYPE__ *)ElfFile + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
if (ItrProgramHeader.p_type == PT_DYNAMIC)
{
struct Elf64_Dyn *Dynamic = (struct Elf64_Dyn *)((__UINT8_TYPE__ *)ElfFile + ItrProgramHeader.p_offset);
for (__SIZE_TYPE__ i = 0; i < ItrProgramHeader.p_filesz / sizeof(struct Elf64_Dyn); i++)
{
if (Dynamic[i].d_tag == Tag)
{
// debug("Found dynamic tag %d at %#lx [d_val: %#lx].", Tag, &Dynamic[i], Dynamic[i].d_un.d_val);
return &Dynamic[i];
}
if (Dynamic[i].d_tag == DT_NULL)
{
// debug("Reached end of dynamic tag list for tag %d.", Tag);
return (void *)0;
}
}
}
}
// debug("Dynamic tag %d not found.", Tag);
return (void *)0;
}

367
libc/ElfInterpreter/ld.c
View File

@ -1,20 +1,10 @@
#include "ld.h"
#include "../../libs/include/sysbase.h"
#include "../../../Kernel/syscalls.h"
#include "../../../Kernel/ipc.h"
#include "elf.h"
enum KCtl
{
KCTL_NULL,
KCTL_GET_PID,
KCTL_GET_TID,
KCTL_GET_UID,
KCTL_GET_GID,
KCTL_GET_PAGE_SIZE,
KCTL_IS_CRITICAL,
};
uintptr_t RequestPages(size_t Count)
{
return syscall1(_RequestPages, Count);
@ -27,7 +17,7 @@ int FreePages(uintptr_t Address, size_t Count)
int IPC(enum IPCCommand Command, enum IPCType Type, int ID, int Flags, void *Buffer, size_t Size)
{
return syscall6(_IPC, Command, Type, ID, Flags, Buffer, Size);
return syscall6(_IPC, (long)Command, (long)Type, (long)ID, (long)Flags, (long)Buffer, (long)Size);
}
uintptr_t KernelCTL(enum KCtl Command, uint64_t Arg1, uint64_t Arg2, uint64_t Arg3, uint64_t Arg4)
@ -38,10 +28,10 @@ uintptr_t KernelCTL(enum KCtl Command, uint64_t Arg1, uint64_t Arg2, uint64_t Ar
struct LibAddressCollection
{
char Name[32];
__UINTPTR_TYPE__ *ElfFile;
__UINTPTR_TYPE__ *MemoryImage;
__UINTPTR_TYPE__ *ParentElfFile;
__UINTPTR_TYPE__ *ParentMemoryImage;
uintptr_t ElfFile;
uintptr_t MemoryImage;
uintptr_t ParentElfFile;
uintptr_t ParentMemoryImage;
struct LibAddressCollection *Next;
char Valid;
};
@ -67,12 +57,12 @@ __attribute__((naked, used, no_stack_protector)) void ELF_LAZY_RESOLVE_STUB()
"push %r8\n"
"push %r9\n"
"mov %r11, %rdi\n"
"mov %r10, %rsi\n"
"mov %r11, %rdi\n" // Move the first argument to rdi (libs collection)
"mov %r10, %rsi\n" // Move the second argument to rsi (rel index)
"call ELF_LAZY_RESOLVE_MAIN\n"
"mov %rax, %r11\n"
"mov %rax, %r11\n" // Move the return value to r11
"pop %r9\n"
"pop %r8\n"
@ -81,10 +71,10 @@ __attribute__((naked, used, no_stack_protector)) void ELF_LAZY_RESOLVE_STUB()
"pop %rsi\n"
"pop %rdi\n"
"jmp *%r11\n");
"jmp *%r11\n"); // Jump to the return value
}
long abs(long i) { return i < 0 ? -i : i; }
int abs(int i) { return i < 0 ? -i : i; }
void swap(char *x, char *y)
{
@ -105,7 +95,7 @@ char *ltoa(long Value, char *Buffer, int Base)
if (Base < 2 || Base > 32)
return Buffer;
long n = abs(Value);
long n = (long)abs((int)Value);
int i = 0;
while (n)
@ -136,6 +126,18 @@ static inline void PutCharToKernelConsole(char c)
: "rcx", "r11", "memory");
}
void Print(char *String)
{
for (short i = 0; String[i] != '\0'; i++)
PutCharToKernelConsole(String[i]);
}
void PrintNL(char *String)
{
Print(String);
Print("\n");
}
void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n)
{
__UINT8_TYPE__ *d = dest;
@ -145,6 +147,13 @@ void *memcpy(void *dest, const void *src, __SIZE_TYPE__ n)
return dest;
}
void *memset(void *s, int c, __SIZE_TYPE__ n)
{
__UINT8_TYPE__ *p = s;
while (n--)
*p++ = c;
}
int strcmp(const char *l, const char *r)
{
for (; *l == *r && *l; l++, r++)
@ -152,10 +161,40 @@ int strcmp(const char *l, const char *r)
return *(unsigned char *)l - *(unsigned char *)r;
}
Elf64_Sym *ELFGetSymbol(__UINTPTR_TYPE__ *ElfFile, char *SymbolName)
struct Elf64_Dyn *ELFGetDynamicTag(void *ElfFile, enum DynamicArrayTags Tag)
{
struct Elf64_Dyn *_SymTab = ELFGetDynamicTag(ElfFile, DT_SYMTAB);
struct Elf64_Dyn *_StrTab = ELFGetDynamicTag(ElfFile, DT_STRTAB);
Elf64_Ehdr *ELFHeader = (Elf64_Ehdr *)ElfFile;
Elf64_Phdr ItrProgramHeader;
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
memcpy(&ItrProgramHeader, (__UINT8_TYPE__ *)ElfFile + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
if (ItrProgramHeader.p_type == PT_DYNAMIC)
{
struct Elf64_Dyn *Dynamic = (struct Elf64_Dyn *)((__UINT8_TYPE__ *)ElfFile + ItrProgramHeader.p_offset);
for (__SIZE_TYPE__ i = 0; i < ItrProgramHeader.p_filesz / sizeof(struct Elf64_Dyn); i++)
{
if (Dynamic[i].d_tag == Tag)
{
// debug("Found dynamic tag %d at %#lx [d_val: %#lx].", Tag, &Dynamic[i], Dynamic[i].d_un.d_val);
return &Dynamic[i];
}
if (Dynamic[i].d_tag == DT_NULL)
{
// debug("Reached end of dynamic tag list for tag %d.", Tag);
return (void *)0;
}
}
}
}
// debug("Dynamic tag %d not found.", Tag);
return (void *)0;
}
Elf64_Sym *ELFGetSymbol(uintptr_t ElfFile, char *SymbolName)
{
struct Elf64_Dyn *_SymTab = ELFGetDynamicTag((void *)ElfFile, DT_SYMTAB);
struct Elf64_Dyn *_StrTab = ELFGetDynamicTag((void *)ElfFile, DT_STRTAB);
Elf64_Sym *DynSym = (Elf64_Sym *)(ElfFile + _SymTab->d_un.d_ptr);
char *DynStr = (char *)(ElfFile + _StrTab->d_un.d_ptr);
@ -164,36 +203,27 @@ Elf64_Sym *ELFGetSymbol(__UINTPTR_TYPE__ *ElfFile, char *SymbolName)
if (strcmp(DynStr + DynSym[i].st_name, SymbolName) == 0)
return &DynSym[i];
}
PrintNL("ELFGetSymbol: Symbol not found!");
return (Elf64_Sym *)0;
}
void Print(char *String)
{
for (short i = 0; String[i] != '\0'; i++)
PutCharToKernelConsole(String[i]);
}
void PrintNL(char *String)
{
for (short i = 0; String[i] != '\0'; i++)
PutCharToKernelConsole(String[i]);
PutCharToKernelConsole('\n');
}
void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))()
{
char DbgBuff[32];
if (Info)
{
struct LibAddressCollection *tmp = Info;
PrintNL("________________");
PrintNL("_______");
// The last entry is the null entry (Valid == false) which determines the end of the list.
while (tmp->Valid)
{
Print("-- ");
Print(tmp->Name);
Print(" ");
ltoa(RelIndex, DbgBuff, 10);
Print(DbgBuff);
PrintNL(" --");
__UINTPTR_TYPE__ BaseAddress = __UINTPTR_MAX__;
uintptr_t BaseAddress = __UINTPTR_MAX__;
Elf64_Phdr ItrProgramHeader;
@ -203,19 +233,17 @@ void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))(
BaseAddress = MIN(BaseAddress, ItrProgramHeader.p_vaddr);
}
char LibAddressBuffer[32];
ltoa(tmp->MemoryImage, LibAddressBuffer, 16);
Print("MemoryImage: 0x");
PrintNL(LibAddressBuffer);
ltoa((long)tmp->MemoryImage, DbgBuff, 16);
Print("mmImg 0x");
PrintNL(DbgBuff);
char BaseAddressBuffer[32];
ltoa(BaseAddress, BaseAddressBuffer, 16);
Print("BaseAddress: 0x");
PrintNL(BaseAddressBuffer);
ltoa(BaseAddress, DbgBuff, 16);
Print("BAddr 0x");
PrintNL(DbgBuff);
struct Elf64_Dyn *_JmpRel = ELFGetDynamicTag(tmp->ElfFile, DT_JMPREL);
struct Elf64_Dyn *_SymTab = ELFGetDynamicTag(tmp->ElfFile, DT_SYMTAB);
struct Elf64_Dyn *_StrTab = ELFGetDynamicTag(tmp->ElfFile, DT_STRTAB);
struct Elf64_Dyn *_JmpRel = ELFGetDynamicTag((void *)tmp->ElfFile, DT_JMPREL);
struct Elf64_Dyn *_SymTab = ELFGetDynamicTag((void *)tmp->ElfFile, DT_SYMTAB);
struct Elf64_Dyn *_StrTab = ELFGetDynamicTag((void *)tmp->ElfFile, DT_STRTAB);
if (!_JmpRel)
{
@ -243,75 +271,20 @@ void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))(
if (!_JmpRel && !_SymTab && !_StrTab)
goto RetryNextLib;
char JmpRel_d_ptr[32];
ltoa(_JmpRel->d_un.d_ptr, JmpRel_d_ptr, 16);
Print("JmpRel_d_ptr: 0x");
PrintNL(JmpRel_d_ptr);
char SymTab_d_ptr[32];
ltoa(_SymTab->d_un.d_ptr, SymTab_d_ptr, 16);
Print("SymTab_d_ptr: 0x");
PrintNL(SymTab_d_ptr);
char StrTab_d_ptr[32];
ltoa(_StrTab->d_un.d_ptr, StrTab_d_ptr, 16);
Print("StrTab_d_ptr: 0x");
PrintNL(StrTab_d_ptr);
Elf64_Rela *JmpRel = tmp->MemoryImage + (_JmpRel->d_un.d_ptr - BaseAddress);
Elf64_Sym *SymTab = tmp->MemoryImage + (_SymTab->d_un.d_ptr - BaseAddress);
char *DynStr = tmp->MemoryImage + (_StrTab->d_un.d_ptr - BaseAddress);
Elf64_Rela *JmpRel = (Elf64_Rela *)(tmp->MemoryImage + (_JmpRel->d_un.d_ptr - BaseAddress));
Elf64_Sym *SymTab = (Elf64_Sym *)(tmp->MemoryImage + (_SymTab->d_un.d_ptr - BaseAddress));
char *DynStr = (char *)(tmp->MemoryImage + (_StrTab->d_un.d_ptr - BaseAddress));
Elf64_Rela *Rel = JmpRel + RelIndex;
// Elf64_Rela *Rel = &JmpRel[RelIndex];
Elf64_Addr *GOTEntry = (Elf64_Addr *)(tmp->MemoryImage + Rel->r_offset);
int RelType = ELF64_R_TYPE(Rel->r_info);
char RelBuffer[32];
ltoa(Rel, RelBuffer, 16);
Print("Rel: 0x");
PrintNL(RelBuffer);
char LibRelInfoBuffer[32];
ltoa(Rel->r_info, LibRelInfoBuffer, 16);
Print(" Rel->r_info: 0x");
PrintNL(LibRelInfoBuffer);
char LibRelOffsetBuffer[32];
ltoa(Rel->r_offset, LibRelOffsetBuffer, 16);
Print(" Rel->r_offset: 0x");
PrintNL(LibRelOffsetBuffer);
char LibRelAddEntBuffer[32];
ltoa(Rel->r_addend, LibRelAddEntBuffer, 16);
Print(" Rel->r_addend: 0x");
PrintNL(LibRelAddEntBuffer);
char RelIndexBuffer[32];
ltoa(RelIndex, RelIndexBuffer, 16);
Print("RelIndex: 0x");
PrintNL(RelIndexBuffer);
char GotAddressBuffer[32];
ltoa(GOTEntry, GotAddressBuffer, 16);
Print("GOTEntry: 0x");
PrintNL(GotAddressBuffer);
if (GOTEntry && GOTEntry < 0x10000000)
{
char GotInsideBuffer[32];
ltoa(*GOTEntry, GotInsideBuffer, 16);
Print("*GOTEntry: 0x");
PrintNL(GotInsideBuffer);
}
switch (RelType)
{
case R_X86_64_NONE:
{
PrintNL("R_X86_64_NONE");
if (*GOTEntry == 0)
{
PrintNL("GOTEntry is 0");
@ -325,17 +298,22 @@ void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))(
PrintNL("R_X86_64_JUMP_SLOT");
int SymIndex = ELF64_R_SYM(Rel->r_info);
Elf64_Sym *Sym = SymTab + SymIndex;
// Elf64_Sym *Sym = &SymTab[SymIndex];
if (Sym->st_name)
{
char *SymName = DynStr + Sym->st_name;
char *SymName = DynStr + Sym->st_name; /* I think i get this wrong */
Print("SymName: ");
PrintNL(SymName);
Elf64_Sym *LibSym = ELFGetSymbol(tmp->ElfFile, SymName);
if (LibSym)
{
*GOTEntry = (Elf64_Addr)(tmp->MemoryImage + LibSym->st_value);
ltoa(*GOTEntry, DbgBuff, 16);
Print("*GOTEntry: 0x");
PrintNL(DbgBuff);
Lock = 0;
return (void (*)()) * GOTEntry;
}
@ -344,15 +322,15 @@ void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))(
}
default:
{
char RelTypeBuffer[32];
ltoa(RelType, RelTypeBuffer, 10);
ltoa(RelType, DbgBuff, 10);
Print("RelType not supported ");
PrintNL(RelTypeBuffer);
PrintNL(DbgBuff);
break;
}
}
RetryNextLib:
PrintNL("Retrying next lib");
tmp = tmp->Next;
}
}
@ -360,47 +338,14 @@ void (*ELF_LAZY_RESOLVE_MAIN(struct LibAddressCollection *Info, long RelIndex))(
Lock = 0;
__asm__ __volatile__("mfence\n");
char SNotFound[32];
Print("Symbol index ");
ltoa(RelIndex, SNotFound, 10);
Print(SNotFound);
ltoa(RelIndex, DbgBuff, 10);
Print(DbgBuff);
PrintNL(" not found");
int ExitCode = 0x51801;
syscall1(_Exit, ExitCode);
while (1) // Make sure we don't return
;
__builtin_unreachable();
}
bool ELFAddLazyResolverToGOT(void *ElfFile, void *MemoryImage, struct LibAddressCollection *Libs)
{
struct Elf64_Dyn *Dyn = (struct Elf64_Dyn *)ELFGetDynamicTag(ElfFile, DT_PLTGOT);
if (!Dyn)
return false;
Elf64_Addr *GOT = (Elf64_Addr *)Dyn->d_un.d_ptr;
// for (size_t i = 0; i < 16; i++)
// {
// char Itr[32];
// char LibAddressBuffer[32];
// char LibValueBuffer[32];
// ltoa(i, Itr, 10);
// ltoa(&GOT[i], LibAddressBuffer, 16);
// ltoa(GOT[i], LibValueBuffer, 16);
// Print("GOT[");
// Print(Itr);
// Print("]: 0x");
// Print(LibAddressBuffer);
// Print(" (val: 0x");
// Print(LibValueBuffer);
// PrintNL(")");
// }
GOT[1] = (uintptr_t)Libs;
GOT[2] = (uintptr_t)ELF_LAZY_RESOLVE_STUB;
return true;
}
/* This function is a mess and needs to be cleaned up. */
@ -656,6 +601,19 @@ bool ELFDynamicReallocation(void *ElfFile, void *MemoryImage)
ELFAddLazyResolverToGOT(ElfFile, MemoryImage, LibsForLazyResolver);
*/
struct InterpreterIPCDataLibrary
{
char Name[128];
};
typedef struct
{
char Path[256];
void *ElfFile;
void *MemoryImage;
struct InterpreterIPCDataLibrary Libraries[64];
} InterpreterIPCData;
/* Preload */
int ld_main()
{
@ -670,36 +628,32 @@ int ld_main()
if (KCTL_ret == false)
return -4;
syscall2(_Print, 'H', 0);
/* Everything is ok, continue. */
return 0;
}
struct InterpreterIPCDataLibrary
bool ELFAddLazyResolverToGOT(void *ElfFile, void *MemoryImage, struct LibAddressCollection *Libs)
{
char Name[128];
};
struct Elf64_Dyn *Dyn = (struct Elf64_Dyn *)ELFGetDynamicTag(ElfFile, DT_PLTGOT);
if (!Dyn)
return false;
typedef struct
{
char Path[256];
void *ElfFile;
void *MemoryImage;
struct InterpreterIPCDataLibrary Libraries[64];
} InterpreterIPCData;
Elf64_Addr *GOT = (Elf64_Addr *)Dyn->d_un.d_ptr;
GOT[1] = (uintptr_t)Libs;
GOT[2] = (uintptr_t)ELF_LAZY_RESOLVE_STUB;
return true;
}
/* Actual load */
int ld_load(int argc, char *argv[], char *envp[])
{
syscall2(_Print, 'L', 0);
uintptr_t PageSize = KernelCTL(KCTL_GET_PAGE_SIZE, 0, 0, 0, 0);
int PagesForStruct = sizeof(InterpreterIPCData) / PageSize + 1;
InterpreterIPCData *IPCBuffer = (InterpreterIPCData *)RequestPages(PagesForStruct);
int PagesForIPCDataStruct = sizeof(InterpreterIPCData) / PageSize + 1;
InterpreterIPCData *IPCBuffer = (InterpreterIPCData *)RequestPages(PagesForIPCDataStruct);
int IPC_ID = IPC(IPC_CREATE, IPC_TYPE_MessagePassing, 0, 0, "LOAD", sizeof(InterpreterIPCData));
while (1)
while (true)
{
IPC(IPC_LISTEN, IPC_TYPE_MessagePassing, IPC_ID, 1, NULL, 0);
IPC(IPC_WAIT, IPC_TYPE_MessagePassing, IPC_ID, 0, NULL, 0);
@ -708,34 +662,65 @@ int ld_load(int argc, char *argv[], char *envp[])
break;
}
for (size_t i = 0; i < 256; i++)
{
if (IPCBuffer->Path[i] == '\0')
break;
syscall2(_Print, IPCBuffer->Path[i], 0);
}
syscall2(_Print, '\n', 0);
IPC(IPC_DELETE, IPC_TYPE_MessagePassing, IPC_ID, 0, NULL, 0);
FreePages((uintptr_t)IPCBuffer, PagesForStruct);
Elf64_Ehdr *ELFHeader = (Elf64_Ehdr *)IPCBuffer->MemoryImage;
/* ... */
struct LibAddressCollection *LibsForLazyResolver = (struct LibAddressCollection *)RequestPages(sizeof(struct LibAddressCollection) / PageSize + 1);
/*
TODO: Add libraries to LibsForLazyResolver
This can be done by calling the kernel to load the libraries, and then adding them to the LibsForLazyResolver struct.
Kernel has a thread for loading libraries. If the lib is already loaded, it will return the address of the loaded lib.
*/
for (size_t i = 0; i < 64; i++)
{
if (IPCBuffer->Libraries[i].Name[0] == '\0')
break;
uintptr_t lib_addr = KernelCTL(KCTL_GET_ELF_LIB_FILE, (uint64_t)IPCBuffer->Libraries[i].Name, 0, 0, 0);
uintptr_t lib_mm_image = KernelCTL(KCTL_GET_ELF_LIB_FILE, (uint64_t)IPCBuffer->Libraries[i].Name, 0, 0, 0);
if (lib_addr == 0 || lib_mm_image == 0)
{
enum SyscallsErrorCodes ret = KernelCTL(KCTL_REGISTER_ELF_LIB, (uint64_t)IPCBuffer->Libraries[i].Name, (uint64_t)IPCBuffer->Libraries[i].Name, 0, 0);
if (ret != SYSCALL_OK)
{
PrintNL("Failed to register ELF lib");
return -0x11B;
}
lib_addr = KernelCTL(KCTL_GET_ELF_LIB_FILE, (uint64_t)IPCBuffer->Libraries[i].Name, 0, 0, 0);
lib_mm_image = KernelCTL(KCTL_GET_ELF_LIB_FILE, (uint64_t)IPCBuffer->Libraries[i].Name, 0, 0, 0);
}
if (LibsForLazyResolver->Next == NULL)
{
LibsForLazyResolver->Valid = true;
LibsForLazyResolver->ElfFile = (uintptr_t)lib_addr;
LibsForLazyResolver->MemoryImage = (uintptr_t)lib_mm_image;
for (size_t j = 0; j < 32; j++)
LibsForLazyResolver->Name[j] = IPCBuffer->Libraries[i].Name[j];
LibsForLazyResolver->Next = (struct LibAddressCollection *)RequestPages(sizeof(struct LibAddressCollection) / PageSize + 1);
memset(LibsForLazyResolver->Next, 0, sizeof(struct LibAddressCollection));
continue;
}
struct LibAddressCollection *CurrentLibsForLazyResolver = LibsForLazyResolver;
while (CurrentLibsForLazyResolver->Next != NULL)
CurrentLibsForLazyResolver = CurrentLibsForLazyResolver->Next;
CurrentLibsForLazyResolver->Valid = true;
CurrentLibsForLazyResolver->ElfFile = (uintptr_t)lib_addr;
CurrentLibsForLazyResolver->MemoryImage = (uintptr_t)lib_mm_image;
for (size_t j = 0; j < 32; j++)
CurrentLibsForLazyResolver->Name[j] = IPCBuffer->Libraries[i].Name[j];
CurrentLibsForLazyResolver->Next = (struct LibAddressCollection *)RequestPages(sizeof(struct LibAddressCollection) / PageSize + 1);
memset(CurrentLibsForLazyResolver->Next, 0, sizeof(struct LibAddressCollection));
}
struct LibAddressCollection *CurrentLibsForLazyResolver = LibsForLazyResolver;
if (!ELFAddLazyResolverToGOT(IPCBuffer->ElfFile, IPCBuffer->MemoryImage, LibsForLazyResolver))
{
for (size_t i = 0; i < 35; i++)
syscall2(_Print, "Failed to add lazy resolver to GOT\n"[i], 0);
return -0xE1F;
PrintNL("Failed to add lazy resolver to GOT");
return -0x607;
}
return ((int (*)(int, char *[], char *[]))ELFHeader->e_entry)(argc, argv, envp);
Elf64_Addr Entry = ((Elf64_Ehdr *)IPCBuffer->MemoryImage)->e_entry;
IPC(IPC_DELETE, IPC_TYPE_MessagePassing, IPC_ID, 0, NULL, 0);
FreePages((uintptr_t)IPCBuffer, PagesForIPCDataStruct);
return ((int (*)(int, char *[], char *[]))Entry)(argc, argv, envp);
}