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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.
This commit is contained in:
Andrew Burgess 2018-12-13 19:06:23 +00:00
parent fb44d95af6
commit ecc82c0590
2 changed files with 9 additions and 1 deletions
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5
gdb/ChangeLog
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@ -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.

5
gdb/riscv-tdep.c
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@ -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;
}