docs/devel/tcg.rst

14 Generator". For more information, please take a look at :ref:`tcg-ops-ref`.
20 -----------------------
34 ---------------------
48 callback to be re-evaluated before executing additional instructions.
127 Self-modifying code and translated code invalidation
128 ----------------------------------------------------
130 Self-modifying code is a special challenge in x86 emulation because no
134 User-mode emulation marks a host page as write-protected (if it is
135 not already read-only) every time translated code is generated for a
152 -----------------
165 very often throughout the execution of a translation block---this includes
171 -------------
194 ---------------------
199 limitation you can use the ``-perfmap`` or the ``-jitdump`` option to generate
200 map files. ``-perfmap`` is lightweight and produces only guest-host mappings.
201 ``-jitdump`` additionally saves JITed code and guest debug information (if
207   perf record $QEMU -perfmap $REMAINING_ARGS
210   perf record -k 1 $QEMU -jitdump $REMAINING_ARGS
211   DEBUGINFOD_URLS= perf inject -j -i perf.data -o perf.data.jitted
212   perf report -i perf.data.jitted
214 Note that qemu-system generates mappings only for ``-kernel`` files in ELF