+ if (regno < 0x1000 && progbufsize < 2) {
+ // Make the debugger use the program buffer if it's available, so it
+ // can test both use cases.
+ write32(debug_abstract, i++, csrw(S0, CSR_DSCRATCH));
+
+ if (write) {
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, lw(S0, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, ld(S0, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
+ write32(debug_abstract, i++, csrw(S0, regno));
+
+ } else {
+ write32(debug_abstract, i++, csrr(S0, regno));
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, sw(S0, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, sd(S0, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
+ }
+ write32(debug_abstract, i++, csrr(S0, CSR_DSCRATCH));
+
+ } else if (regno >= 0x1000 && regno < 0x1020) {
+ unsigned regnum = regno - 0x1000;
+
+ switch (size) {
+ case 2:
+ if (write)
+ write32(debug_abstract, i++, lw(regnum, ZERO, debug_data_start));
+ else
+ write32(debug_abstract, i++, sw(regnum, ZERO, debug_data_start));
+ break;
+ case 3:
+ if (write)
+ write32(debug_abstract, i++, ld(regnum, ZERO, debug_data_start));
+ else
+ write32(debug_abstract, i++, sd(regnum, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }