S390: Name "invisible" registers with the empty string instead of NULL
Commit Message
When adding vector register support to GDB, s390_register_name() was
added to suppress the right halves of the first 16 vector registers.
However, that function returned NULL instead of an empty string in such
a case. This leads to an incomplete list of registers returned by
"complete info registers ", because completion stops at the first NULL
return value from user_reg_map_regnum_to_name().
gdb/ChangeLog:
* s390-linux-tdep.c (s390_register_name): Return empty string
instead of NULL for registers that shouldn't be visible.
---
gdb/s390-linux-tdep.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
@@ -269,15 +269,15 @@ regnum_is_vxr_full (struct gdbarch_tdep *tdep, int regnum)
&& regnum <= tdep->v0_full_regnum + 15);
}
-/* Return the name of register REGNO. Return NULL for registers that
- shouldn't be visible. */
+/* Return the name of register REGNO. Return the empty string for
+ registers that shouldn't be visible. */
static const char *
s390_register_name (struct gdbarch *gdbarch, int regnum)
{
if (regnum >= S390_V0_LOWER_REGNUM
&& regnum <= S390_V15_LOWER_REGNUM)
- return NULL;
+ return "";
return tdesc_register_name (gdbarch, regnum);
}