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Kernel: Add x86_64 support for fork()

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Gunnar Beutner 2021-06-29 02:56:07 +02:00 • committed by Andreas Kling
parent 811f9d562d
commit df9e73de25
4 changed files with 42 additions and 35 deletions
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25
Kernel/Syscalls/fork.cpp
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@ -66,8 +66,29 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
dbgln_if(FORK_DEBUG, "fork: child will begin executing at {:04x}:{:08x} with stack {:04x}:{:08x}, kstack {:04x}:{:08x}",
child_regs.cs, child_regs.eip, child_regs.ss, child_regs.esp, child_regs.ss0, child_regs.esp0);
#else
(void)regs;
PANIC("Process::sys$fork() not implemented.");
auto& child_regs = child_first_thread->m_regs;
child_regs.rax = 0; // fork() returns 0 in the child :^)
child_regs.rbx = regs.rbx;
child_regs.rcx = regs.rcx;
child_regs.rdx = regs.rdx;
child_regs.rbp = regs.rbp;
child_regs.rsp = regs.userspace_rsp;
child_regs.rsi = regs.rsi;
child_regs.rdi = regs.rdi;
child_regs.r8 = regs.r8;
child_regs.r9 = regs.r9;
child_regs.r10 = regs.r10;
child_regs.r11 = regs.r11;
child_regs.r12 = regs.r12;
child_regs.r13 = regs.r13;
child_regs.r14 = regs.r14;
child_regs.r15 = regs.r15;
child_regs.rflags = regs.rflags;
child_regs.rip = regs.rip;
child_regs.cs = regs.cs;
dbgln_if(FORK_DEBUG, "fork: child will begin executing at {:04x}:{:16x} with stack {:08x}, kstack {:08x}",
child_regs.cs, child_regs.rip, child_regs.rsp, child_regs.rsp0);
#endif
{