Add --dm-no-abstract-fpr option.

Previously FPRs could always be accessed using abstract commands. I need
this to get coverage of some OpenOCD code that I broke. (See
https://github.com/riscv/riscv-openocd/pull/745)

2 files changed, 2 insertions, 1 deletions

diff --git a/riscv/debug_module.cc b/riscv/debug_module.cc
index d297f14..f5c0c73 100644
--- a/riscv/debug_module.cc
+++ b/riscv/debug_module.cc
@@ -672,7 +672,7 @@ bool debug_module_t::perform_abstract_command()
           write32(debug_abstract, i++, csrw(S0, CSR_DSCRATCH0));
         }
 
-      } else if (regno >= 0x1020 && regno < 0x1040) {
+      } else if (regno >= 0x1020 && regno < 0x1040 && config.support_abstract_fpr_access) {
         unsigned fprnum = regno - 0x1020;
 
         if (write) {
diff --git a/riscv/debug_module.h b/riscv/debug_module.h
index 8230557..8fb335d 100644
--- a/riscv/debug_module.h
+++ b/riscv/debug_module.h
@@ -19,6 +19,7 @@ typedef struct {
   unsigned abstract_rti;
   bool support_hasel;
   bool support_abstract_csr_access;
+  bool support_abstract_fpr_access;
   bool support_haltgroups;
   bool support_impebreak;
 } debug_module_config_t;