Debugging with GDB: PowerPC Features

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#### G.5.9 PowerPC Features

The ‘`org.gnu.gdb.power.core`’ feature is required for PowerPC targets. It should contain registers ‘`r0`’ through ‘`r31`’, ‘`pc`’, ‘`msr`’, ‘`cr`’, ‘`lr`’, ‘`ctr`’, and ‘`xer`’. They may be 32-bit or 64-bit depending on the target.

The ‘`org.gnu.gdb.power.fpu`’ feature is optional. It should contain registers ‘`f0`’ through ‘`f31`’ and ‘`fpscr`’.

The ‘`org.gnu.gdb.power.altivec`’ feature is optional. It should contain registers ‘`vr0`’ through ‘`vr31`’, ‘`vscr`’, and ‘`vrsave`’.

The ‘`org.gnu.gdb.power.vsx`’ feature is optional. It should contain registers ‘`vs0h`’ through ‘`vs31h`’. GDB will combine these registers with the floating point registers (‘`f0`’ through ‘`f31`’) and the altivec registers (‘`vr0`’ through ‘`vr31`’) to present the 128-bit wide registers ‘`vs0`’ through ‘`vs63`’, the set of vector registers for POWER7.

The ‘`org.gnu.gdb.power.spe`’ feature is optional. It should contain registers ‘`ev0h`’ through ‘`ev31h`’, ‘`acc`’, and ‘`spefscr`’. SPE targets should provide 32-bit registers in ‘`org.gnu.gdb.power.core`’ and provide the upper halves in ‘`ev0h`’ through ‘`ev31h`’. GDB will combine these to present registers ‘`ev0`’ through ‘`ev31`’ to the user.