G.4.2 i386 Features

The `org.gnu.gdb.i386.core' feature is required for i386/amd64 targets. It should describe the following registers:

• `eax' through `edi' plus `eip' for i386
• `rax' through `r15' plus `rip' for amd64
• `eflags', `cs', `ss', `ds', `es', `fs', `gs'
• `st0' through `st7'
• `fctrl', `fstat', `ftag', `fiseg', `fioff', `foseg', `fooff' and `fop'

The register sets may be different, depending on the target.

The `org.gnu.gdb.i386.sse' feature is optional. It should describe registers:

• `xmm0' through `xmm7' for i386
• `xmm0' through `xmm15' for amd64
• `mxcsr'

The `org.gnu.gdb.i386.avx' feature is optional and requires the `org.gnu.gdb.i386.sse' feature. It should describe the upper 128 bits of ymm registers:

• `ymm0h' through `ymm7h' for i386
• `ymm0h' through `ymm15h' for amd64

The `org.gnu.gdb.i386.linux' feature is optional. It should describe a single register, `orig_eax'.