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Kernel: Add stubs for missing x86_64 functionality

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This adds just enough stubs to make the kernel compile on x86_64. Obviously
it won't do anything useful - in fact it won't even attempt to boot because
Multiboot doesn't support ELF64 binaries - but it gets those compiler errors
out of the way so more progress can be made getting all the missing
functionality in place.
This commit is contained in:
Gunnar Beutner 2021-06-23 21:54:41 +02:00 • committed by Andreas Kling
parent f2eb759901
commit 38fca26f54
Notes: sideshowbarker 2024-07-18 11:35:51 +09:00
21 changed files with 295 additions and 40 deletions
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6
Kernel/Syscalls/fork.cpp
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@ -7,6 +7,7 @@
#include <Kernel/Debug.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/Panic.h>
#include <Kernel/PerformanceManager.h>
#include <Kernel/Process.h>
#include <Kernel/VM/Region.h>
@ -43,6 +44,7 @@ KResultOr<pid_t> Process::sys$fork(RegisterState& regs)
dbgln_if(FORK_DEBUG, "fork: child={}", child);
child->space().set_enforces_syscall_regions(space().enforces_syscall_regions());
#if ARCH(I386)
auto& child_tss = child_first_thread->m_tss;
child_tss.eax = 0; // fork() returns 0 in the child :^)
child_tss.ebx = regs.ebx;
@ -62,6 +64,10 @@ KResultOr<pid_t> Process::sys$fork(RegisterState& regs)
child_tss.ss = regs.userspace_ss;
dbgln_if(FORK_DEBUG, "fork: child will begin executing at {:04x}:{:08x} with stack {:04x}:{:08x}, kstack {:04x}:{:08x}", child_tss.cs, child_tss.eip, child_tss.ss, child_tss.esp, child_tss.ss0, child_tss.esp0);
#else
(void)regs;
PANIC("Process::sys$fork() not implemented.");
#endif
{
ScopedSpinLock lock(space().get_lock());