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Red zone (computing)

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Red Zone is a term designating the fixed size area in memory beyond the stack pointer that has not been "allocated". This region of memory is not to be modified by interrupt/exception/signal handlers. This allows the space to be used for temporary data without the extra overhead of modifying the stack pointer. The x86-64 ABI mandates a 128 byte red zone.[1] The OpenRISC toolchain assumes a 128 byte red zone though it is not documented.

Notes and references

  1. ^ "i386 and x86-64 Options - Using the GNU Compiler Collection (GCC)". Retrieved 2011-04-10.
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