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ns32000: hook exceptions in debugger prior to entry

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* handle unexpected double memory abort
This commit is contained in:
Patrick Mackinlay 2024-03-11 13:02:41 +07:00
parent 8dbb5b3da2
commit 30cd73d2bb
1 changed files with 15 additions and 4 deletions
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19
src/devices/cpu/ns32000/ns32000.cpp
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@ -812,6 +812,9 @@ template <int HighBits, int Width> void ns32000_device<HighBits, Width>::flags(u
template <int HighBits, int Width> void ns32000_device<HighBits, Width>::interrupt(unsigned const trap) template <int HighBits, int Width> void ns32000_device<HighBits, Width>::interrupt(unsigned const trap)
{ {
if (machine().debug_enabled() && (trap > ABT))
debug()->exception_hook(trap);
unsigned offset = trap * 4; unsigned offset = trap * 4;
switch (trap) switch (trap)
@ -901,9 +904,6 @@ template <int HighBits, int Width> void ns32000_device<HighBits, Width>::interru
m_sequential = false; m_sequential = false;
m_icount -= top(SIZE_W, m_sp0) * 2 + top(SIZE_W, m_intbase + offset) + top(SIZE_D, m_sp0) + top(SIZE_D, m_mod); m_icount -= top(SIZE_W, m_sp0) * 2 + top(SIZE_W, m_intbase + offset) + top(SIZE_D, m_sp0) + top(SIZE_D, m_mod);
if (machine().debug_enabled() && (trap > ABT))
debug()->exception_hook(trap);
} }
template <int HighBits, int Width> void ns32000_device<HighBits, Width>::lpr(unsigned reg, addr_mode const mode, bool user, unsigned &tex) template <int HighBits, int Width> void ns32000_device<HighBits, Width>::lpr(unsigned reg, addr_mode const mode, bool user, unsigned &tex)
@ -3615,7 +3615,18 @@ template <int HighBits, int Width> void ns32000_device<HighBits, Width>::execute
} }
catch (ns32000_abort const &) catch (ns32000_abort const &)
{ {
interrupt(ABT); try
{
interrupt(ABT);
}
catch (ns32000_abort const &)
{
// this shouldn't happen; probably indicates supervisor stack overflow (stuck interrupt?)
if (machine().debug_enabled())
machine().debug_break();
else
fatalerror("abort during abort entry 0x%08x\n", m_pc);
}
} }
} }
} }