fxsave(1)
fxsave - pretty print the output of FXSAVE instruction
fxsave [-mxre] [-p hex] [-c hex_code]
fxsave prints the output of the FXSAVE x86 instruction.
-h Print the help summary.
-c code Provide x86 code to execute before the call to FXSAVE. This code is to be provided in hexadecimal and will be executed directly with no checks.
This will be executed as its own function, and a *RET* (0xc3) is
automatically appended to this code.
-e Execute FXSAVE instruction with rex.w prefix set to 1 (extended 64 bit mode). The output is then following the layout of the 64-bit mode FXSAVE64 Map, instead of FXSAVE Map, as documented on the Intel SDM Volume 2.
This option is not available if *fxsave* was built in 32bit
mode.
-p pattern Initialization pattern of FXSAVE area. pattern is an hexadecimal string. The default is 0x5a. It is useful to find what is part of the memory is overridden by FXSAVE. Note that it is possible that a register is filled with the pattern. It may be useful to clear the register with the -c option in this case.
-m, -x, -r Toggle printing MM registers (-m), XMM registers (-x), and reserved fields (-r). By default, they are not shown.