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Update kernel

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This commit is contained in:
EnderIce2
2024-01-19 06:47:42 +02:00
parent fd15592608
commit 96daa43d38
282 changed files with 25486 additions and 15700 deletions
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70
syscalls/native/fork.cpp
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@ -25,23 +25,26 @@
#include "../../syscalls.h"
#include "../../kernel.h"
#include "../../ipc.h"
using InterProcessCommunication::IPC;
using InterProcessCommunication::IPCID;
using Tasking::PCB;
using Tasking::TCB;
using Tasking::TaskState::Ready;
using Tasking::TaskState::Terminated;
using namespace Memory;
#define SysFrm SyscallsFrame
void sys_fork_return()
{
#if defined(a64)
typedef long arch_t;
asmv("movq $0, %rax\n"); /* Return 0 */
asmv("movq %r8, %rsp\n"); /* Restore stack pointer */
asmv("movq %r8, %rbp\n"); /* Restore base pointer */
asmv("swapgs\n"); /* Swap GS back to the user GS */
asmv("sti\n"); /* Enable interrupts */
asmv("sysretq\n"); /* Return to rcx address in user mode */
#elif defined(a32)
typedef int arch_t;
#warning "sys_fork not implemented for i386"
#endif
__builtin_unreachable();
}
/* https://pubs.opengroup.org/onlinepubs/009604499/functions/fork.html */
int sys_fork(SysFrm *Frame)
@ -54,15 +57,11 @@ int sys_fork(SysFrm *Frame)
PCB *Parent = thisThread->Parent;
TCB *Thread = thisThread;
void *ProcSymTable = nullptr;
if (Parent->ELFSymbolTable)
ProcSymTable = Parent->ELFSymbolTable->GetImage();
PCB *NewProcess =
TaskManager->CreateProcess(Parent,
Parent->Name,
Parent->Security.ExecutionMode,
ProcSymTable);
nullptr, true);
if (!NewProcess)
{
@ -70,7 +69,18 @@ int sys_fork(SysFrm *Frame)
return -EAGAIN;
}
NewProcess->IPC->Fork(Parent->IPC);
if (Parent->ELFSymbolTable &&
Parent->ELFSymbolTable->SymTableExists)
{
NewProcess->ELFSymbolTable = new SymbolResolver::Symbols(0);
foreach (auto sym in Parent->ELFSymbolTable->GetSymTable())
{
NewProcess->ELFSymbolTable->AddSymbol(sym.Address,
sym.FunctionName);
}
}
NewProcess->PageTable = Parent->PageTable->Fork();
TCB *NewThread =
TaskManager->CreateThread(NewProcess,
@ -92,50 +102,30 @@ int sys_fork(SysFrm *Frame)
TaskManager->UpdateFrame();
/* This if statement will overwrite
most of the registers except rcx
and r8-r15 */
if (thisThread->ID == NewThread->ID)
{
/* We can't just return 0; because the
gsTCB->SyscallStack is no
longer valid */
#if defined(a64)
asmv("movq $0, %rax\n"); /* Return 0 */
asmv("movq %r8, %rsp\n"); /* Restore stack pointer */
asmv("movq %r8, %rbp\n"); /* Restore base pointer */
asmv("swapgs\n"); /* Swap GS back to the user GS */
asmv("sti\n"); /* Enable interrupts */
asmv("sysretq\n"); /* Return to rcx address in user mode */
#elif defined(a32)
#warning "sys_fork not implemented for i386"
#endif
__builtin_unreachable();
}
memcpy(&NewThread->FPU, &Thread->FPU, sizeof(CPU::x64::FXState));
NewThread->FPU = Thread->FPU;
NewThread->Stack->Fork(Thread->Stack);
NewThread->Info.Architecture = Thread->Info.Architecture;
NewThread->Info.Compatibility = Thread->Info.Compatibility;
NewThread->Security.IsCritical = Thread->Security.IsCritical;
NewThread->Registers = Thread->Registers;
#if defined(a64)
NewThread->Registers.rip = (uintptr_t)sys_fork_return;
/* For sysretq */
NewThread->Registers.rcx = Frame->ReturnAddress;
NewThread->Registers.r8 = Frame->StackPointer;
#endif
if (Thread->Security.IsCritical)
NewThread->SetCritical(true);
#ifdef a86
NewThread->GSBase = NewThread->ShadowGSBase;
NewThread->ShadowGSBase = Thread->ShadowGSBase;
NewThread->FSBase = Thread->FSBase;
#endif
debug("ret addr: %#lx, stack: %#lx ip: %#lx", Frame->ReturnAddress,
Frame->StackPointer, (uintptr_t)sys_fork_return);
debug("Forked thread \"%s\"(%d) to \"%s\"(%d)",
Thread->Name, Thread->ID,
NewThread->Name, NewThread->ID);
NewThread->State = Ready;
NewThread->SetState(Ready);
return (int)NewProcess->ID;
}