NTSTATUS 0xC0000092 (STATUS_FLOAT_STACK

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The x87 register stack overflowed or underflowed during a floating-point operation.

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STATUS_FLOAT_OVERFLOW	STATUS_FLOAT_UNDERFLOW

STATUS_FLOAT_STACK_CHECK

The x87 floating-point register stack is inconsistent

This status concerns the eight-entry x87 floating-point register stack, not the thread’s memory stack. It can occur when x87 instructions push onto a full register stack, pop an empty entry, or use an unexpected stack tag. Hand-written assembly, inline assembly, mismatched calling code, or incorrect exception recovery are typical causes.

Modern compiler-generated SSE/AVX arithmetic does not use the x87 stack in the same way, so first identify the instruction set at the fault. Inspect the x87 status word, TOP field, and tag state before another floating-point instruction changes them. If the fault follows a callback or foreign-language boundary, verify that the callee preserves the floating-point environment and balances every x87 stack operation.

What to inspect

Disassemble the x87 instruction sequence and count pushes, pops, and exchanges.
Capture the x87 status word, TOP value, tags, and register contents.
Check inline assembly and cross-language calling boundaries.
Do not investigate thread stack reserve unless a separate stack exception exists.

References

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