[PATCH] gdb/csky modify registers list for general_reggroup

[Jiangshuai Li <jiangshuai_li@c-sky.com>]

there are two modification points here:
1. for the debugging of csky architecture, after executing "info register",
   we hope to print out GPRs, PC and the registers related to exceptions
2. with tdesc-xml, users can view the register groups described in XML
---
 gdb/csky-tdep.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/gdb/csky-tdep.c b/gdb/csky-tdep.c
index 502b01e33e1..fcdb865eb87 100644
--- a/gdb/csky-tdep.c
+++ b/gdb/csky-tdep.c
@@ -2518,7 +2518,11 @@ csky_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
   if (reggroup == save_reggroup || reggroup == restore_reggroup)
     return raw_p;
 
-  if (((regnum >= CSKY_R0_REGNUM) && (regnum <= CSKY_R0_REGNUM + 31))
+  if ((((regnum >= CSKY_R0_REGNUM) && (regnum <= CSKY_R0_REGNUM + 31))
+       || (regnum == CSKY_PC_REGNUM)
+       || (regnum == CSKY_EPC_REGNUM)
+       || (regnum == CSKY_CR0_REGNUM)
+       || (regnum == CSKY_EPSR_REGNUM))
       && (reggroup == general_reggroup))
     return 1;
 
@@ -2548,6 +2552,10 @@ csky_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
       && (reggroup == fr_reggroup))
     return 6;
 
+  if (tdesc_has_registers (gdbarch_target_desc (gdbarch)))
+    if (tdesc_register_in_reggroup_p (gdbarch, regnum, reggroup) > 0)
+      return 7;
+
   return 0;
 }
 
@@ -3020,6 +3028,8 @@ csky_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
       set_gdbarch_num_regs (gdbarch, (num_regs + 1));
       tdesc_use_registers (gdbarch, info.target_desc, std::move (tdesc_data));
       set_gdbarch_register_type (gdbarch, csky_register_type);
+      set_gdbarch_register_reggroup_p (gdbarch,
+                                       csky_register_reggroup_p);
     }
 
   if (tdep->fv_pseudo_registers_count)
-- 
2.25.1