From: Andrew Burgess <andrew.burgess@embecosm.com>
Date: Thu, 13 Dec 2018 19:06:23 +0000 (+0000)
Subject: gdb/riscv: Add float status registers to save and restore reggroups
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ecc82c059059cfa21a8a099779253686f9637f9f;p=binutils-gdb.git

gdb/riscv: Add float status registers to save and restore reggroups

We should save and restore the floating point status registers.  This
became an issue when testing 32-bit float on a target with 64-bit with
the gdb.base/callfuncs.exp test.

gdb/ChangeLog:

	* riscv-tdep.c (riscv_register_reggroup_p): Save and restore fcsr,
	fflags, and frm registers.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ea003617f25..513bc7ceb08 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-22  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* riscv-tdep.c (riscv_register_reggroup_p): Save and restore fcsr,
+	fflags, and frm registers.
+
 2018-12-22  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* riscv-tdep.c (riscv_dwarf_reg_to_regnum): New function.
diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
index 3408f5a21df..704e8512b3d 100644
--- a/gdb/riscv-tdep.c
+++ b/gdb/riscv-tdep.c
@@ -896,7 +896,10 @@ riscv_register_reggroup_p (struct gdbarch  *gdbarch, int regnum,
   else if (reggroup == restore_reggroup || reggroup == save_reggroup)
     {
       if (riscv_has_fp_regs (gdbarch))
-	return regnum <= RISCV_LAST_FP_REGNUM;
+	return (regnum <= RISCV_LAST_FP_REGNUM
+		|| regnum == RISCV_CSR_FCSR_REGNUM
+		|| regnum == RISCV_CSR_FFLAGS_REGNUM
+		|| regnum == RISCV_CSR_FRM_REGNUM);
       else
 	return regnum < RISCV_FIRST_FP_REGNUM;
     }