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Kernel: Move process signal trampoline address into protected data

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This commit is contained in:
Andreas Kling 2021-03-11 13:28:50 +01:00
parent 08e0e2eb41
commit b7b7a48c66
Notes: sideshowbarker 2024-07-18 21:31:33 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b7b7a48c66b
3 changed files with 4 additions and 3 deletions
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2
Kernel/Process.h
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@ -118,6 +118,7 @@ protected:
bool m_has_execpromises { false };
u32 m_execpromises { 0 };
mode_t m_umask { 022 };
VirtualAddress m_signal_trampoline;
};
class ProcessBase : public ProtectedProcessBase {
@ -544,7 +545,6 @@ private:
String m_name;
OwnPtr<Space> m_space;
VirtualAddress m_signal_trampoline;
RefPtr<ProcessGroup> m_pg;

3
Kernel/Syscalls/execve.cpp
View file

@ -530,7 +530,6 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description
}
signal_trampoline_region.value()->set_syscall_region(true);
m_signal_trampoline = signal_trampoline_region.value()->vaddr();
m_executable = main_program_description->custody();
m_arguments = arguments;
@ -605,6 +604,8 @@ KResult Process::do_exec(NonnullRefPtr<FileDescription> main_program_description
m_execpromises = 0;
m_has_execpromises = false;
m_signal_trampoline = signal_trampoline_region.value()->vaddr();
// FIXME: PID/TID ISSUE
m_pid = new_main_thread->tid().value();
}

2
Kernel/Syscalls/fork.cpp
View file

@ -44,7 +44,6 @@ KResultOr<pid_t> Process::sys$fork(RegisterState& regs)
child->m_veil_state = m_veil_state;
child->m_unveiled_paths = m_unveiled_paths.deep_copy();
child->m_fds = m_fds;
child->m_signal_trampoline = m_signal_trampoline;
child->m_pg = m_pg;
{
@ -56,6 +55,7 @@ KResultOr<pid_t> Process::sys$fork(RegisterState& regs)
child->m_sid = m_sid;
child->m_extra_gids = m_extra_gids;
child->m_umask = m_umask;
child->m_signal_trampoline = m_signal_trampoline;
}
dbgln_if(FORK_DEBUG, "fork: child={}", child);