[PATCH] gdb: xtensa: fix register counters for xtensa-linux

[Max Filippov]

Commit 37d9e0623102 ("gdb: xtensa: handle privileged registers") changed
how the tdep->num_regs and tdep->num_pseudo_regs are calculated, but
didn't update these numbers in the gdbarch for the xtensa-linux target.
As a result xtensa-linux-gdb behaves as xtensa-elf-gdb and cannot
communicate with the linux gdbserver.
Fix tdep->num_pseudo_regs calculation and call set_gdbarch_num_regs and
set_gdbarch_num_pseudo_regs in xtensa_linux_init_abi.

gdb/
2018-11-16 Max Filippov <***@gmail.com>

* xtensa-linux-tdep.c (xtensa_linux_init_abi): Update
tdep->num_pseudo_regs. Add calls to set_gdbarch_num_regs and
set_gdbarch_num_pseudo_regs.
---
gdb/xtensa-linux-tdep.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gdb/xtensa-linux-tdep.c b/gdb/xtensa-linux-tdep.c
index b62085de2fcb..051c3b4c46f1 100644
--- a/gdb/xtensa-linux-tdep.c
+++ b/gdb/xtensa-linux-tdep.c
@@ -101,7 +101,13 @@ xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

if (tdep->num_nopriv_regs < tdep->num_regs)
- tdep->num_regs = tdep->num_nopriv_regs;
+ {
+ tdep->num_pseudo_regs += tdep->num_regs - tdep->num_nopriv_regs;
+ tdep->num_regs = tdep->num_nopriv_regs;
+
+ set_gdbarch_num_regs (gdbarch, tdep->num_regs);
+ set_gdbarch_num_pseudo_regs (gdbarch, tdep->num_pseudo_regs);
+ }

linux_init_abi (info, gdbarch);