Next: TIC6x Features, Previous: PowerPC Features, Up: Standard Target Features
The `org.gnu.gdb.s390.core' feature is required for S/390 and System z targets. It should contain the PSW and the 16 general registers. In particular, System z targets should provide the 64-bit registers `pswm', `pswa', and `r0' through `r15'. S/390 targets should provide the 32-bit versions of these registers. A System z target that runs in 31-bit addressing mode should provide 32-bit versions of `pswm' and `pswa', as well as the general register's upper halves `r0h' through `r15h', and their lower halves `r0l' through `r15l'.
The `org.gnu.gdb.s390.fpr' feature is required. It should contain the 64-bit registers `f0' through `f15', and `fpc'.
The `org.gnu.gdb.s390.acr' feature is required. It should contain the 32-bit registers `acr0' through `acr15'.
The `org.gnu.gdb.s390.linux' feature is optional. It should contain the register `orig_r2', which is 64-bit wide on System z targets and 32-bit otherwise. In addition, the feature may contain the `last_break' register, whose width depends on the addressing mode, as well as the `system_call' register, which is always 32-bit wide.
The `org.gnu.gdb.s390.tdb' feature is optional. It should contain the 64-bit registers `tdb0', `tac', `tct', `atia', and `tr0' through `tr15'.
The `org.gnu.gdb.s390.vx' feature is optional. It should contain 64-bit wide registers `v0l' through `v15l', which will be combined by gdb with the floating point registers `f0' through `f15' to present the 128-bit wide vector registers `v0' through `v15'. In addition, this feature should contain the 128-bit wide vector registers `v16' through `v31'.