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Kernel: Fix signal generation

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We need to have interrupts enabled when signal kills the process as
process does mutex locking. Also signals are now only checked when
returning to userspace in the same place where userspace segments are
loaded.
This commit is contained in:
Bananymous
2026-04-04 22:36:54 +03:00
parent 47d85eb281
commit a29681a524
7 changed files with 166 additions and 143 deletions
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17
kernel/include/kernel/Thread.h
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@@ -56,12 +56,10 @@ namespace Kernel
// Returns true, if thread is going to trigger signal
bool is_interrupted_by_signal(bool skip_stop_and_cont = false) const;
// Returns true if pending signal can be added to thread
bool can_add_signal_to_execute() const;
bool will_execute_signal() const;
// Returns true if handled signal had SA_RESTART
bool handle_signal(int signal = 0, const siginfo_t& signal_info = {});
void add_signal(int signal, const siginfo_t& info);
bool handle_signal_if_interrupted();
bool handle_signal(int signal, const siginfo_t&);
void add_signal(int signal, const siginfo_t&);
void set_suspend_signal_mask(uint64_t sigmask);
static bool is_stopping_signal(int signal);
@@ -153,6 +151,15 @@ namespace Kernel
bool currently_on_alternate_stack() const;
struct signal_handle_info_t
{
vaddr_t signal_handler;
vaddr_t signal_stack_top;
bool has_sa_restart;
};
signal_handle_info_t remove_signal_and_get_info(int signal);
void handle_signal_impl(int signal, const siginfo_t&, vaddr_t signal_handler, vaddr_t signal_stack_top);
private:
// NOTE: this is the first member to force it being last destructed
// {kernel,userspace}_stack has to be destroyed before page table