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fix(kernel/vfs): 🎉 a complete rewrite of the vfs

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This is the fourth time re-writing the VFS, hope this will be the last. Tried to make it as modular as possible so this won't be necessary in the future. 🙏

This change required the entire kernel code to be modified.
This commit is contained in:
EnderIce2
2025-05-13 15:59:12 +00:00
parent 83a7f83f81
commit 557c7e6235
83 changed files with 3252 additions and 2487 deletions
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72
Kernel/exec/elf/elf_loader.cpp
View File

@ -32,7 +32,7 @@ using namespace vfs;
namespace Execute
{
void ELFObject::GenerateAuxiliaryVector(Memory::VirtualMemoryArea *vma, FileNode *fd, Elf_Ehdr ELFHeader, uintptr_t EntryPoint, uintptr_t BaseAddress)
void ELFObject::GenerateAuxiliaryVector(Memory::VirtualMemoryArea *vma, Node &fd, Elf_Ehdr ELFHeader, uintptr_t EntryPoint, uintptr_t BaseAddress)
{
char *aux_platform = (char *)vma->RequestPages(1, true); /* TODO: 4KiB is too much for this */
strcpy(aux_platform, "x86_64");
@ -79,7 +79,7 @@ namespace Execute
#endif
}
void ELFObject::LoadSegments(FileNode *fd, PCB *TargetProcess, Elf_Ehdr &ELFHeader, uintptr_t &BaseAddress)
void ELFObject::LoadSegments(Node &fd, PCB *TargetProcess, Elf_Ehdr &ELFHeader, uintptr_t &BaseAddress)
{
Memory::Virtual vmm(TargetProcess->PageTable);
Memory::VirtualMemoryArea *vma = TargetProcess->vma;
@ -91,7 +91,7 @@ namespace Execute
size_t SegmentsSize = 0;
for (Elf_Half i = 0; i < ELFHeader.e_phnum; i++)
{
fd->Read(&ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
fs->Read(fd, &ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
if (ProgramHeader.p_type == PT_LOAD || ProgramHeader.p_type == PT_DYNAMIC)
{
@ -113,7 +113,7 @@ namespace Execute
for (Elf_Half i = 0; i < ELFHeader.e_phnum; i++)
{
fd->Read(&ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
fs->Read(fd, &ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
switch (ProgramHeader.p_type)
{
@ -132,7 +132,7 @@ namespace Execute
if (ProgramHeader.p_filesz > 0)
{
fd->Read(SegmentDestination, ProgramHeader.p_filesz, ProgramHeader.p_offset);
fs->Read(fd, (void *)SegmentDestination, ProgramHeader.p_filesz, ProgramHeader.p_offset);
}
if (ProgramHeader.p_memsz - ProgramHeader.p_filesz > 0)
@ -158,7 +158,7 @@ namespace Execute
if (ProgramHeader.p_filesz > 0)
{
fd->Read(DynamicSegmentDestination, ProgramHeader.p_filesz, ProgramHeader.p_offset);
fs->Read(fd, (void *)DynamicSegmentDestination, ProgramHeader.p_filesz, ProgramHeader.p_offset);
}
if (ProgramHeader.p_memsz - ProgramHeader.p_filesz > 0)
@ -212,7 +212,7 @@ namespace Execute
{
for (Elf64_Half i = 0; i < ELFHeader.e_phnum; i++)
{
fd->Read(&ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
fs->Read(fd, &ProgramHeader, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
switch (ProgramHeader.p_type)
{
case PT_LOAD:
@ -245,7 +245,7 @@ namespace Execute
if (ProgramHeader.p_filesz > 0)
{
debug("%d %#lx %d", ProgramHeader.p_offset, (uint8_t *)pAddr + destOffset, ProgramHeader.p_filesz);
fd->Read((uint8_t *)pAddr + destOffset, ProgramHeader.p_filesz, ProgramHeader.p_offset);
fs->Read(fd, (uint8_t *)pAddr + destOffset, ProgramHeader.p_filesz, ProgramHeader.p_offset);
}
if (ProgramHeader.p_memsz - ProgramHeader.p_filesz > 0)
@ -265,35 +265,35 @@ namespace Execute
case PT_NOTE:
{
Elf_Nhdr NoteHeader;
fd->Read(&NoteHeader, sizeof(Elf_Nhdr), ProgramHeader.p_offset);
fs->Read(fd, &NoteHeader, sizeof(Elf_Nhdr), ProgramHeader.p_offset);
switch (NoteHeader.n_type)
{
case NT_PRSTATUS:
{
Elf_Prstatus prstatus;
fd->Read(&prstatus, sizeof(Elf_Prstatus), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
fs->Read(fd, &prstatus, sizeof(Elf_Prstatus), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
debug("PRSTATUS: %#lx", prstatus.pr_reg[0]);
break;
}
case NT_PRPSINFO:
{
Elf_Prpsinfo prpsinfo;
fd->Read(&prpsinfo, sizeof(Elf_Prpsinfo), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
fs->Read(fd, &prpsinfo, sizeof(Elf_Prpsinfo), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
debug("PRPSINFO: %s", prpsinfo.pr_fname);
break;
}
case NT_PLATFORM:
{
char platform[256];
fd->Read(&platform, sizeof(platform), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
fs->Read(fd, &platform, sizeof(platform), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
debug("PLATFORM: %s", platform);
break;
}
case NT_AUXV:
{
Elf_auxv_t auxv;
fd->Read(&auxv, sizeof(Elf_auxv_t), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
fs->Read(fd, &auxv, sizeof(Elf_auxv_t), ProgramHeader.p_offset + sizeof(Elf_Nhdr));
debug("AUXV: %#lx", auxv.a_un.a_val);
break;
}
@ -311,7 +311,7 @@ namespace Execute
debug("TLS Size: %ld (%ld pages)",
tlsSize, TO_PAGES(tlsSize));
void *tlsMemory = vma->RequestPages(TO_PAGES(tlsSize));
fd->Read(tlsMemory, tlsSize, ProgramHeader.p_offset);
fs->Read(fd, tlsMemory, tlsSize, ProgramHeader.p_offset);
TargetProcess->TLS = {
.pBase = uintptr_t(tlsMemory),
.vBase = ProgramHeader.p_vaddr,
@ -346,12 +346,12 @@ namespace Execute
case PT_GNU_PROPERTY:
{
Elf_Nhdr NoteHeader;
fd->Read(&NoteHeader, sizeof(Elf_Nhdr), ProgramHeader.p_offset);
fs->Read(fd, &NoteHeader, sizeof(Elf_Nhdr), ProgramHeader.p_offset);
if (NoteHeader.n_type == NT_GNU_PROPERTY_TYPE_0)
{
char noteName[0x400];
fd->Read(noteName, NoteHeader.n_namesz, ProgramHeader.p_offset + sizeof(Elf_Nhdr));
fs->Read(fd, noteName, NoteHeader.n_namesz, ProgramHeader.p_offset + sizeof(Elf_Nhdr));
noteName[NoteHeader.n_namesz - 1] = '\0';
if (strcmp(noteName, "GNU") == 0)
@ -394,10 +394,10 @@ namespace Execute
TargetProcess->ProgramBreak->InitBrk(ProgramBreak);
}
void ELFObject::LoadExec(FileNode *fd, PCB *TargetProcess)
void ELFObject::LoadExec(Node &fd, PCB *TargetProcess)
{
Elf_Ehdr ehdr{};
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
uintptr_t entry = ehdr.e_entry;
debug("Entry point is %#lx", entry);
@ -424,10 +424,10 @@ namespace Execute
#endif
}
void ELFObject::LoadDyn(FileNode *fd, PCB *TargetProcess)
void ELFObject::LoadDyn(Node &fd, PCB *TargetProcess)
{
Elf_Ehdr ehdr{};
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
uintptr_t entry = ehdr.e_entry;
debug("Entry point is %#lx", entry);
@ -465,24 +465,25 @@ namespace Execute
Elf_Phdr interp = interpVec.front();
std::string interpreterPath;
interpreterPath.resize(256);
fd->Read(interpreterPath.data(), 256, interp.p_offset);
fs->Read(fd, interpreterPath.data(), 256, interp.p_offset);
debug("Interpreter: %s", interpreterPath.c_str());
FileNode *ifd = fs->GetByPath(interpreterPath.c_str(), TargetProcess->Info.RootNode);
if (ifd == nullptr)
eNode ret = fs->Lookup(TargetProcess->Info.RootNode, interpreterPath);
if (ret == false)
{
warn("Failed to open interpreter file: %s", interpreterPath.c_str());
warn("Failed to open interpreter file: %s", ret.what());
return;
}
Node ifd = ret;
if (ifd->IsSymbolicLink())
{
char buffer[512];
ifd->ReadLink(buffer, sizeof(buffer));
ifd = fs->GetByPath(buffer, ifd->Parent);
fs->ReadLink(ifd, buffer, sizeof(buffer));
ifd = fs->Lookup(ifd->Parent, buffer);
}
debug("ifd: %p, interpreter: %s", ifd, interpreterPath.c_str());
debug("ifd: %p, interpreter: %s", ifd.get(), interpreterPath.c_str());
if (GetBinaryType(interpreterPath) != BinTypeELF)
{
warn("Interpreter %s is not an ELF file", interpreterPath.c_str());
@ -492,10 +493,10 @@ namespace Execute
LoadInterpreter(ifd, TargetProcess);
}
bool ELFObject::LoadInterpreter(FileNode *fd, PCB *TargetProcess)
bool ELFObject::LoadInterpreter(Node &fd, PCB *TargetProcess)
{
Elf_Ehdr ehdr;
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
switch (ehdr.e_type)
{
@ -550,18 +551,19 @@ namespace Execute
return;
}
FileNode *fd = fs->GetByPath(AbsolutePath.c_str(), TargetProcess->Info.RootNode);
if (fd == nullptr)
eNode ret = fs->Lookup(TargetProcess->Info.RootNode, AbsolutePath);
if (ret == false)
{
error("Failed to open %s, errno: %d", AbsolutePath.c_str(), fd);
error("Failed to open %s, errno: %s", AbsolutePath.c_str(), ret.what());
return;
}
Node fd = ret;
if (fd->IsSymbolicLink())
{
char buffer[512];
fd->ReadLink(buffer, sizeof(buffer));
fd = fs->GetByPath(buffer, fd->Parent);
fs->ReadLink(fd, buffer, sizeof(buffer));
fd = fs->Lookup(fd->Parent, buffer);
}
debug("Opened %s", AbsolutePath.c_str());
@ -575,7 +577,7 @@ namespace Execute
envc++;
Elf_Ehdr ehdr{};
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
// ELFargv = new const char *[argc + 2];
size_t argv_size = argc + 2 * sizeof(char *);

12
Kernel/exec/elf/elf_parse.cpp
View File

@ -92,10 +92,10 @@ namespace Execute
return nullptr;
}
Elf_Sym ELFLookupSymbol(FileNode *fd, std::string Name)
Elf_Sym ELFLookupSymbol(Node fd, std::string Name)
{
Elf_Ehdr ehdr{};
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
Elf_Shdr symTable{};
Elf_Shdr stringTable{};
@ -103,13 +103,13 @@ namespace Execute
for (Elf64_Half i = 0; i < ehdr.e_shnum; i++)
{
Elf_Shdr shdr;
fd->Read(&shdr, sizeof(Elf_Shdr), ehdr.e_shoff + (i * sizeof(Elf_Shdr)));
fs->Read(fd, &shdr, sizeof(Elf_Shdr), ehdr.e_shoff + (i * sizeof(Elf_Shdr)));
switch (shdr.sh_type)
{
case SHT_SYMTAB:
symTable = shdr;
fd->Read(&stringTable, sizeof(Elf_Shdr), ehdr.e_shoff + (shdr.sh_link * sizeof(Elf_Shdr)));
fs->Read(fd, &stringTable, sizeof(Elf_Shdr), ehdr.e_shoff + (shdr.sh_link * sizeof(Elf_Shdr)));
break;
default:
break;
@ -126,11 +126,11 @@ namespace Execute
{
// Elf_Sym *sym = (Elf_Sym *)((uintptr_t)Header + symTable->sh_offset + (i * sizeof(Elf_Sym)));
Elf_Sym sym;
fd->Read(&sym, sizeof(Elf_Sym), symTable.sh_offset + (i * sizeof(Elf_Sym)));
fs->Read(fd, &sym, sizeof(Elf_Sym), symTable.sh_offset + (i * sizeof(Elf_Sym)));
// char *str = (char *)((uintptr_t)Header + stringTable->sh_offset + sym->st_name);
char str[256];
fd->Read(&str, sizeof(str), stringTable.sh_offset + sym.st_name);
fs->Read(fd, &str, sizeof(str), stringTable.sh_offset + sym.st_name);
if (strcmp(str, Name.c_str()) == 0)
return sym;

4
Kernel/exec/elf/parse/elf_get_dynamic_tag.cpp
View File

@ -21,7 +21,7 @@
namespace Execute
{
std::vector<Elf_Dyn> ELFGetDynamicTag(FileNode *fd, DynamicArrayTags Tag)
std::vector<Elf_Dyn> ELFGetDynamicTag(Node &fd, DynamicArrayTags Tag)
{
std::vector<Elf_Dyn> ret;
std::vector<Elf_Phdr> phdrs = ELFGetSymbolType(fd, PT_DYNAMIC);
@ -37,7 +37,7 @@ namespace Execute
Elf_Dyn dyn;
for (size_t i = 0; i < phdr.p_filesz / sizeof(Elf_Dyn); i++)
{
fd->Read(&dyn, sizeof(Elf_Dyn), phdr.p_offset + (i * sizeof(Elf_Dyn)));
fs->Read(fd, &dyn, sizeof(Elf_Dyn), phdr.p_offset + (i * sizeof(Elf_Dyn)));
if (dyn.d_tag != Tag)
continue;

8
Kernel/exec/elf/parse/elf_get_sections.cpp
View File

@ -21,18 +21,18 @@
namespace Execute
{
std::vector<Elf_Shdr> ELFGetSections(FileNode *fd, const char *SectionName)
std::vector<Elf_Shdr> ELFGetSections(Node fd, const char *SectionName)
{
std::vector<Elf_Shdr> ret;
Elf_Ehdr ehdr;
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
std::unique_ptr<Elf_Shdr[]> sections(new Elf_Shdr[ehdr.e_shnum]);
fd->Read(sections.get(), sizeof(Elf_Shdr) * ehdr.e_shnum, ehdr.e_shoff);
fs->Read(fd, sections.get(), sizeof(Elf_Shdr) * ehdr.e_shnum, ehdr.e_shoff);
std::string sectionNames(sections[ehdr.e_shstrndx].sh_size, '\0');
fd->Read(sectionNames.data(), sections[ehdr.e_shstrndx].sh_size, sections[ehdr.e_shstrndx].sh_offset);
fs->Read(fd, sectionNames.data(), sections[ehdr.e_shstrndx].sh_size, sections[ehdr.e_shstrndx].sh_offset);
for (Elf_Half i = 0; i < ehdr.e_shnum; ++i)
{

8
Kernel/exec/elf/parse/elf_get_symbol_type.cpp
View File

@ -21,15 +21,15 @@
namespace Execute
{
std::vector<Elf_Phdr> ELFGetSymbolType(FileNode *fd, SegmentTypes Tag)
std::vector<Elf_Phdr> ELFGetSymbolType(Node &fd, SegmentTypes Tag)
{
std::vector<Elf_Phdr> ret;
Elf_Ehdr ehdr;
fd->Read(&ehdr, sizeof(Elf_Ehdr), 0);
fs->Read(fd, &ehdr, sizeof(Elf_Ehdr), 0);
Elf_Phdr phdr;
fd->Read(&phdr, sizeof(Elf_Phdr), ehdr.e_phoff);
fs->Read(fd, &phdr, sizeof(Elf_Phdr), ehdr.e_phoff);
off_t off = ehdr.e_phoff;
for (Elf_Half i = 0; i < ehdr.e_phnum; i++)
@ -38,7 +38,7 @@ namespace Execute
ret.push_back(phdr);
off += sizeof(Elf_Phdr);
fd->Read(&phdr, sizeof(Elf_Phdr), off);
fs->Read(fd, &phdr, sizeof(Elf_Phdr), off);
}
return ret;