G.5.12 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’. GDB will define pseudo-registers ‘v0’ through ‘v31’ as aliases for the corresponding ‘vrX’ registers.

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-scalar registers for POWER7. Therefore, this feature requires both ‘org.gnu.gdb.power.fpu’ and ‘org.gnu.gdb.power.altivec’.

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.

The ‘org.gnu.gdb.power.ppr’ feature is optional. It should contain the 64-bit register ‘ppr’.

The ‘org.gnu.gdb.power.dscr’ feature is optional. It should contain the 64-bit register ‘dscr’.

The ‘org.gnu.gdb.power.tar’ feature is optional. It should contain the 64-bit register ‘tar’.

The ‘org.gnu.gdb.power.ebb’ feature is optional. It should contain registers ‘bescr’, ‘ebbhr’ and ‘ebbrr’, all 64-bit wide.

The ‘org.gnu.gdb.power.linux.pmu’ feature is optional. It should contain registers ‘mmcr0’, ‘mmcr2’, ‘siar’, ‘sdar’ and ‘sier’, all 64-bit wide. This is the subset of the isa 2.07 server PMU registers provided by GNU/Linux.

The ‘org.gnu.gdb.power.htm.spr’ feature is optional. It should contain registers ‘tfhar’, ‘texasr’ and ‘tfiar’, all 64-bit wide.

The ‘org.gnu.gdb.power.htm.core’ feature is optional. It should contain the checkpointed general-purpose registers ‘cr0’ through ‘cr31’, as well as the checkpointed registers ‘clr’ and ‘cctr’. These registers may all be either 32-bit or 64-bit depending on the target. It should also contain the checkpointed registers ‘ccr’ and ‘cxer’, which should both be 32-bit wide.

The ‘org.gnu.gdb.power.htm.fpu’ feature is optional. It should contain the checkpointed 64-bit floating-point registers ‘cf0’ through ‘cf31’, as well as the checkpointed 64-bit register ‘cfpscr’.

The ‘org.gnu.gdb.power.htm.altivec’ feature is optional. It should contain the checkpointed altivec registers ‘cvr0’ through ‘cvr31’, all 128-bit wide. It should also contain the checkpointed registers ‘cvscr’ and ‘cvrsave’, both 32-bit wide.

The ‘org.gnu.gdb.power.htm.vsx’ feature is optional. It should contain registers ‘cvs0h’ through ‘cvs31h’. GDB will combine these registers with the checkpointed floating point registers (‘cf0’ through ‘cf31’) and the checkpointed altivec registers (‘cvr0’ through ‘cvr31’) to present the 128-bit wide checkpointed vector-scalar registers ‘cvs0’ through ‘cvs63’. Therefore, this feature requires both ‘org.gnu.gdb.power.htm.altivec’ and ‘org.gnu.gdb.power.htm.fpu’.

The ‘org.gnu.gdb.power.htm.ppr’ feature is optional. It should contain the 64-bit checkpointed register ‘cppr’.

The ‘org.gnu.gdb.power.htm.dscr’ feature is optional. It should contain the 64-bit checkpointed register ‘cdscr’.

The ‘org.gnu.gdb.power.htm.tar’ feature is optional. It should contain the 64-bit checkpointed register ‘ctar’.