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stack under/overflow check

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This commit is contained in:
Kelvin Sherlock 2013-02-17 16:02:25 -05:00
parent add2d6b5a3
commit 2059327323
1 changed files with 18 additions and 2 deletions
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20
bin/loader.cpp
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@ -753,7 +753,7 @@ int main(int argc, char **argv)
/// ahhh... need to set PC after memory.
// for pre-fetch.
memorySetMemory(Memory, MemorySize);
if (Flags.traceGlobals) memorySetGlobalLog(0x3000);
if (Flags.traceGlobals) memorySetGlobalLog(0x10000);
cpuInitializeFromNewPC(address);
MM::Init(Memory, MemorySize, HighWater);
@ -776,13 +776,29 @@ int main(int argc, char **argv)
for (;;)
{
uint32_t pc = cpuGetPC();
uint32_t sp = cpuGetAReg(7);
if (pc == 0x00000000)
{
fprintf(stderr, "Exiting - PC = 0\n");
exit(1);
}
if (cpuGetStop()) break;
if (sp < StackRange.first)
{
fprintf(stderr, "Stack overflow error - please increase the stack size (--stack=size)\n");
fprintf(stderr, "Current stack size is 0x%06x\n", Flags.stack);
exit(1);
}
if (sp > StackRange.second)
{
fprintf(stderr, "Stack underflow error\n");
exit(1);
}
if (cpuGetStop()) break; // will this also be set by an interrupt?
cpuExecuteInstruction();
}