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Kernel: Add support for SA_SIGINFO

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Bananymous
2025-11-13 04:19:06 +02:00
parent a44c45ff9e
commit dd636ffcb2
13 changed files with 260 additions and 96 deletions
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34
kernel/kernel/IDT.cpp
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@@ -203,7 +203,7 @@ namespace Kernel
if (result.is_error())
{
dwarnln("Demand paging: {}", result.error());
Thread::current().handle_signal(SIGKILL);
Thread::current().handle_signal(SIGKILL, {});
goto done;
}
}
@@ -273,30 +273,48 @@ namespace Kernel
{
// TODO: Confirm and fix the exception to signal mappings
int signal = 0;
siginfo_t signal_info {};
switch (isr)
{
case ISR::DivisionError:
signal_info.si_signo = SIGFPE;
signal_info.si_code = FPE_INTDIV;
break;
case ISR::SIMDFloatingPointException:
case ISR::x87FloatingPointException:
signal = SIGFPE;
// FIXME: this is probably not correct?
signal_info.si_signo = SIGFPE;
signal_info.si_code = FPE_FLTDIV;
break;
case ISR::AlignmentCheck:
signal = SIGBUS;
signal_info.si_signo = SIGBUS;
signal_info.si_code = BUS_ADRALN;
break;
case ISR::GeneralProtectionFault:
// TODO: this assumes unaligned operand but GP can be also caused by
// a privileged instruction or uncanonical address in which case
// the generated signal should be different
signal_info.si_signo = SIGBUS;
signal_info.si_code = BUS_ADRALN;
break;
case ISR::InvalidOpcode:
signal = SIGILL;
signal_info.si_signo = SIGILL;
signal_info.si_code = ILL_ILLOPC;
break;
case ISR::PageFault:
signal = SIGSEGV;
signal_info.si_signo = SIGSEGV;
if (PageTable::current().get_page_flags(regs->cr2 & PAGE_ADDR_MASK) & PageTable::Flags::Present)
signal_info.si_code = SEGV_ACCERR;
else
signal_info.si_code = SEGV_MAPERR;
break;
default:
dwarnln("Unhandled exception");
signal = SIGABRT;
signal_info.si_signo = SIGABRT;
break;
}
Thread::current().handle_signal(signal);
Thread::current().handle_signal(signal_info.si_signo, signal_info);
}
else
{