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Drop any old signal stacks on exec().

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This commit is contained in:
Andreas Kling 2018-11-28 20:59:10 +01:00
parent 629c5be10b
commit 938d1b8bfb
Notes: sideshowbarker 2024-07-19 16:09:36 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/938d1b8bfb2
1 changed files with 5 additions and 2 deletions
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7
Kernel/Process.cpp
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@ -353,8 +353,11 @@ int Process::do_exec(const String& path, Vector<String>&& arguments, Vector<Stri
}
}
m_signal_stack_kernel_region = nullptr;
m_signal_stack_user_region = nullptr;
memset(m_signal_action_data, 0, sizeof(m_signal_action_data));
m_signal_mask = 0xffffffff;
m_pending_signals = 0;
for (size_t i = 0; i < m_fds.size(); ++i) {
auto& daf = m_fds[i];
@ -387,7 +390,7 @@ int Process::do_exec(const String& path, Vector<String>&& arguments, Vector<Stri
m_tss.cr3 = (dword)m_page_directory;
m_stack_region = allocate_region(LinearAddress(), defaultStackSize, "stack");
ASSERT(m_stack_region);
m_stackTop3 = m_stack_region->linearAddress.offset(defaultStackSize).get() & 0xfffffff8;
m_stackTop3 = m_stack_region->linearAddress.offset(defaultStackSize).get();
m_tss.esp = m_stackTop3;
m_tss.ss0 = 0x10;
m_tss.esp0 = old_esp0;
@ -660,7 +663,7 @@ Process::Process(String&& name, uid_t uid, gid_t gid, pid_t ppid, RingLevel ring
} else {
auto* region = allocate_region(LinearAddress(), defaultStackSize, "stack");
ASSERT(region);
m_stackTop3 = region->linearAddress.offset(defaultStackSize).get() & 0xfffffff8;
m_stackTop3 = region->linearAddress.offset(defaultStackSize).get();
m_tss.esp = m_stackTop3;
}
}