mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-23 08:00:20 +00:00
949aef4aef
This is something I've been meaning to do for a long time, and here we finally go. This patch moves all sys$foo functions out of Process.cpp and into files in Kernel/Syscalls/. It's not exactly one syscall per file (although it could be, but I got a bit tired of the repetitive work here..) This makes hacking on individual syscalls a lot less painful since you don't have to rebuild nearly as much code every time. I'm also hopeful that this makes it easier to understand individual syscalls. :^)
101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <Kernel/FileSystem/Custody.h>
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/VM/Region.h>
|
|
|
|
//#define FORK_DEBUG
|
|
|
|
namespace Kernel {
|
|
|
|
pid_t Process::sys$fork(RegisterState& regs)
|
|
{
|
|
REQUIRE_PROMISE(proc);
|
|
Thread* child_first_thread = nullptr;
|
|
auto* child = new Process(child_first_thread, m_name, m_uid, m_gid, m_pid, m_ring, m_cwd, m_executable, m_tty, this);
|
|
child->m_root_directory = m_root_directory;
|
|
child->m_root_directory_relative_to_global_root = m_root_directory_relative_to_global_root;
|
|
child->m_promises = m_promises;
|
|
child->m_execpromises = m_execpromises;
|
|
child->m_veil_state = m_veil_state;
|
|
child->m_unveiled_paths = m_unveiled_paths;
|
|
child->m_fds = m_fds;
|
|
child->m_sid = m_sid;
|
|
child->m_pgid = m_pgid;
|
|
child->m_umask = m_umask;
|
|
|
|
#ifdef FORK_DEBUG
|
|
dbg() << "fork: child=" << child;
|
|
#endif
|
|
|
|
child->m_extra_gids = m_extra_gids;
|
|
|
|
auto& child_tss = child_first_thread->m_tss;
|
|
child_tss.eax = 0; // fork() returns 0 in the child :^)
|
|
child_tss.ebx = regs.ebx;
|
|
child_tss.ecx = regs.ecx;
|
|
child_tss.edx = regs.edx;
|
|
child_tss.ebp = regs.ebp;
|
|
child_tss.esp = regs.userspace_esp;
|
|
child_tss.esi = regs.esi;
|
|
child_tss.edi = regs.edi;
|
|
child_tss.eflags = regs.eflags;
|
|
child_tss.eip = regs.eip;
|
|
child_tss.cs = regs.cs;
|
|
child_tss.ds = regs.ds;
|
|
child_tss.es = regs.es;
|
|
child_tss.fs = regs.fs;
|
|
child_tss.gs = regs.gs;
|
|
child_tss.ss = regs.userspace_ss;
|
|
|
|
#ifdef FORK_DEBUG
|
|
dbg() << "fork: child will begin executing at " << String::format("%w", child_tss.cs) << ":" << String::format("%x", child_tss.eip) << " with stack " << String::format("%w", child_tss.ss) << ":" << String::format("%x", child_tss.esp) << ", kstack " << String::format("%w", child_tss.ss0) << ":" << String::format("%x", child_tss.esp0);
|
|
#endif
|
|
|
|
ScopedSpinLock lock(m_lock);
|
|
for (auto& region : m_regions) {
|
|
#ifdef FORK_DEBUG
|
|
dbg() << "fork: cloning Region{" << ®ion << "} '" << region.name() << "' @ " << region.vaddr();
|
|
#endif
|
|
auto& child_region = child->add_region(region.clone());
|
|
child_region.map(child->page_directory());
|
|
|
|
if (®ion == m_master_tls_region)
|
|
child->m_master_tls_region = child_region.make_weak_ptr();
|
|
}
|
|
|
|
{
|
|
ScopedSpinLock lock(g_processes_lock);
|
|
g_processes->prepend(child);
|
|
}
|
|
|
|
child_first_thread->set_state(Thread::State::Skip1SchedulerPass);
|
|
return child->pid();
|
|
}
|
|
|
|
}
|