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Fixed Spawn()

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This commit is contained in:
Alex 2022-12-10 06:03:32 +02:00
parent d57d593829
commit 3ef08457e3
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
2 changed files with 115 additions and 24 deletions
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94
Execute/Spawn.cpp
View File

@ -73,12 +73,13 @@ namespace Execute
#if defined(__amd64__)
const char *BaseName;
cwk_path_get_basename(Path, &BaseName, nullptr);
PCB *Process = TaskManager->CreateProcess(TaskManager->GetCurrentProcess(), BaseName, TaskTrustLevel::User);
void *BaseImage = KernelAllocator.RequestPages(TO_PAGES(ExFile->Node->Length));
memcpy(BaseImage, (void *)ExFile->Node->Address, ExFile->Node->Length);
debug("Image Size: %#lx - %#lx (length: %ld)", BaseImage, (uint64_t)BaseImage + ExFile->Node->Length, ExFile->Node->Length);
PCB *Process = TaskManager->CreateProcess(TaskManager->GetCurrentProcess(), BaseName, TaskTrustLevel::User, BaseImage);
Memory::Virtual pva = Memory::Virtual(Process->PageTable);
for (uint64_t i = 0; i < TO_PAGES(ExFile->Node->Length); i++)
pva.Remap((void *)((uint64_t)BaseImage + (i * PAGE_SIZE)), (void *)((uint64_t)BaseImage + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
@ -121,53 +122,98 @@ namespace Execute
if (ELFHeader->e_type == ET_EXEC)
{
trace("Executable");
Elf64_Phdr *pheader = (Elf64_Phdr *)(((char *)BaseImage) + ELFHeader->e_phoff);
debug("p_paddr: %#lx | p_vaddr: %#lx | p_filesz: %#lx | p_memsz: %#lx | p_offset: %#lx", pheader->p_paddr, pheader->p_vaddr, pheader->p_filesz, pheader->p_memsz, pheader->p_offset);
Elf64_Phdr *ProgramHeader = (Elf64_Phdr *)(((char *)BaseImage) + ELFHeader->e_phoff);
debug("p_paddr: %#lx | p_vaddr: %#lx | p_filesz: %#lx | p_memsz: %#lx | p_offset: %#lx", ProgramHeader->p_paddr, ProgramHeader->p_vaddr, ProgramHeader->p_filesz, ProgramHeader->p_memsz, ProgramHeader->p_offset);
void *Address = nullptr;
for (int i = 0; i < ELFHeader->e_phnum; i++, pheader++)
uintptr_t BaseAddress = UINTPTR_MAX;
uint64_t ElfAppSize = 0;
Elf64_Phdr ItrProgramHeader;
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
if (pheader->p_type != PT_LOAD)
continue;
Address = (void *)((uint64_t)pheader->p_vaddr + pheader->p_memsz);
memcpy(&ItrProgramHeader, (uint8_t *)BaseImage + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
BaseAddress = MIN(BaseAddress, ItrProgramHeader.p_vaddr);
}
void *Offset = KernelAllocator.RequestPages(TO_PAGES((uint64_t)Address));
debug("BaseAddress %#lx", BaseAddress);
pheader = (Elf64_Phdr *)(((char *)BaseImage) + ELFHeader->e_phoff);
for (uint64_t i = 0; i < TO_PAGES((uint64_t)Address); i++)
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
pva.Remap((void *)((uint64_t)pheader->p_vaddr + (i * PAGE_SIZE)), (void *)((uint64_t)Offset + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
// debug("Mapping: %#lx -> %#lx", (uint64_t)pheader->p_vaddr + (i * PAGE_SIZE), (uint64_t)Offset + (i * PAGE_SIZE));
memcpy(&ItrProgramHeader, (uint8_t *)BaseImage + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
uintptr_t SegmentEnd;
SegmentEnd = ItrProgramHeader.p_vaddr - BaseAddress + ItrProgramHeader.p_memsz;
ElfAppSize = MAX(ElfAppSize, SegmentEnd);
}
debug("ElfAppSize %ld", ElfAppSize);
uint8_t *MemoryImage = nullptr;
// check for TEXTREL
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
memcpy(&ItrProgramHeader, (uint8_t *)BaseImage + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
if (ItrProgramHeader.p_type == DT_TEXTREL)
{
warn("TEXTREL ELF is not fully tested yet!");
MemoryImage = (uint8_t *)KernelAllocator.RequestPages(TO_PAGES(ElfAppSize));
for (uint64_t i = 0; i < TO_PAGES(ElfAppSize); i++)
{
pva.Remap((void *)((uint64_t)MemoryImage + (i * PAGE_SIZE)), (void *)((uint64_t)MemoryImage + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
debug("Mapping: %#lx -> %#lx", (uint64_t)MemoryImage + (i * PAGE_SIZE), (uint64_t)MemoryImage + (i * PAGE_SIZE));
}
break;
}
}
pheader = (Elf64_Phdr *)(((char *)BaseImage) + ELFHeader->e_phoff);
for (int i = 0; i < ELFHeader->e_phnum; i++, pheader++)
if (!MemoryImage)
{
if (pheader->p_type != PT_LOAD)
continue;
void *dst = (void *)((uint64_t)pheader->p_vaddr + (uint64_t)Offset);
memset(dst, 0, pheader->p_memsz);
memcpy(dst, ((char *)BaseImage) + pheader->p_offset, pheader->p_filesz);
debug("Allocating %ld pages for image", TO_PAGES(ElfAppSize));
MemoryImage = (uint8_t *)KernelAllocator.RequestPages(TO_PAGES(ElfAppSize));
for (uint64_t i = 0; i < TO_PAGES(ElfAppSize); i++)
{
pva.Remap((void *)((uint64_t)ProgramHeader->p_vaddr + (i * PAGE_SIZE)), (void *)((uint64_t)MemoryImage + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
debug("Mapping: %#lx -> %#lx", (uint64_t)ProgramHeader->p_vaddr + (i * PAGE_SIZE), (uint64_t)MemoryImage + (i * PAGE_SIZE));
}
}
debug("BaseAddress: %#lx | ElfAppSize: %#lx (%ld, %ld KB)", BaseAddress, ElfAppSize, ElfAppSize, TO_KB(ElfAppSize));
for (Elf64_Half i = 0; i < ELFHeader->e_phnum; i++)
{
memcpy(&ItrProgramHeader, (uint8_t *)BaseImage + ELFHeader->e_phoff + ELFHeader->e_phentsize * i, sizeof(Elf64_Phdr));
uintptr_t MAddr;
if (ItrProgramHeader.p_type == PT_LOAD)
debug("PT_LOAD");
else
debug("Not PT_LOAD");
MAddr = (ItrProgramHeader.p_vaddr - BaseAddress) + (uintptr_t)MemoryImage;
memset(MemoryImage, 0, ItrProgramHeader.p_memsz);
memcpy(MemoryImage, (uint8_t *)BaseImage + ItrProgramHeader.p_offset, ItrProgramHeader.p_filesz);
debug("MemoryImage: %#lx", MemoryImage);
debug("MAddr: %#lx", MAddr);
debug("memset operation: 0 to %#lx for length %ld", MemoryImage + MAddr, ItrProgramHeader.p_memsz);
debug("memcpy operation: %#lx to %#lx for length %ld", (uint8_t *)BaseImage + ItrProgramHeader.p_offset, MemoryImage + MAddr, ItrProgramHeader.p_filesz);
}
debug("Entry Point: %#lx", ELFHeader->e_entry);
Vector<AuxiliaryVector> auxv;
pheader = (Elf64_Phdr *)(((char *)BaseImage) + ELFHeader->e_phoff);
auxv.push_back({.archaux = {.a_type = AT_PHDR, .a_un = {.a_val = (uint64_t)ELFHeader->e_phoff}}});
auxv.push_back({.archaux = {.a_type = AT_PHENT, .a_un = {.a_val = (uint64_t)ELFHeader->e_phentsize}}});
auxv.push_back({.archaux = {.a_type = AT_PHNUM, .a_un = {.a_val = (uint64_t)ELFHeader->e_phnum}}});
auxv.push_back({.archaux = {.a_type = AT_PAGESZ, .a_un = {.a_val = (uint64_t)PAGE_SIZE}}});
auxv.push_back({.archaux = {.a_type = AT_BASE, .a_un = {.a_val = (uint64_t)Offset}}});
auxv.push_back({.archaux = {.a_type = AT_ENTRY, .a_un = {.a_val = (uint64_t)ELFHeader->e_entry + (uint64_t)pheader->p_offset}}});
auxv.push_back({.archaux = {.a_type = AT_BASE, .a_un = {.a_val = (uint64_t)MemoryImage}}});
auxv.push_back({.archaux = {.a_type = AT_ENTRY, .a_un = {.a_val = (uint64_t)ELFHeader->e_entry + (uint64_t)ProgramHeader->p_offset}}});
auxv.push_back({.archaux = {.a_type = AT_PLATFORM, .a_un = {.a_val = (uint64_t) "x86_64"}}});
auxv.push_back({.archaux = {.a_type = AT_EXECFN, .a_un = {.a_val = (uint64_t)Path}}});
TCB *Thread = TaskManager->CreateThread(Process,
(IP)ELFHeader->e_entry,
argv, envp, auxv,
(IPOffset)pheader->p_offset,
(IPOffset)ProgramHeader->p_offset,
Arch,
Comp);
ret.Process = Process;

45
include/elf.h
View File

@ -247,6 +247,51 @@ enum SegmentTypes
PT_HIPROC = 0x7fffffff
};
#define DT_NULL 0 /* Marks end of dynamic section */
#define DT_NEEDED 1 /* Name of needed library */
#define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */
#define DT_PLTGOT 3 /* Processor defined value */
#define DT_HASH 4 /* Address of symbol hash table */
#define DT_STRTAB 5 /* Address of string table */
#define DT_SYMTAB 6 /* Address of symbol table */
#define DT_RELA 7 /* Address of Rela relocs */
#define DT_RELASZ 8 /* Total size of Rela relocs */
#define DT_RELAENT 9 /* Size of one Rela reloc */
#define DT_STRSZ 10 /* Size of string table */
#define DT_SYMENT 11 /* Size of one symbol table entry */
#define DT_INIT 12 /* Address of init function */
#define DT_FINI 13 /* Address of termination function */
#define DT_SONAME 14 /* Name of shared object */
#define DT_RPATH 15 /* Library search path (deprecated) */
#define DT_SYMBOLIC 16 /* Start symbol search here */
#define DT_REL 17 /* Address of Rel relocs */
#define DT_RELSZ 18 /* Total size of Rel relocs */
#define DT_RELENT 19 /* Size of one Rel reloc */
#define DT_PLTREL 20 /* Type of reloc in PLT */
#define DT_DEBUG 21 /* For debugging; unspecified */
#define DT_TEXTREL 22 /* Reloc might modify .text */
#define DT_JMPREL 23 /* Address of PLT relocs */
#define DT_BIND_NOW 24 /* Process relocations of object */
#define DT_INIT_ARRAY 25 /* Array with addresses of init fct */
#define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */
#define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */
#define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */
#define DT_RUNPATH 29 /* Library search path */
#define DT_FLAGS 30 /* Flags for the object being loaded */
#define DT_ENCODING 32 /* Start of encoded range */
#define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/
#define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */
#define DT_SYMTAB_SHNDX 34 /* Address of SYMTAB_SHNDX section */
#define DT_RELRSZ 35 /* Total size of RELR relative relocations */
#define DT_RELR 36 /* Address of RELR relative relocations */
#define DT_RELRENT 37 /* Size of one RELR relative relocaction */
#define DT_NUM 38 /* Number used */
#define DT_LOOS 0x6000000d /* Start of OS-specific */
#define DT_HIOS 0x6ffff000 /* End of OS-specific */
#define DT_LOPROC 0x70000000 /* Start of processor-specific */
#define DT_HIPROC 0x7fffffff /* End of processor-specific */
#define DT_PROCNUM DT_MIPS_NUM /* Most used by any processor */
// used for Elf64_Sym st_info
#define ELF32_ST_BIND(info) ((info) >> 4)
#define ELF32_ST_TYPE(info) ((info)&0xf)