gdb: LoongArch: Change LOONGARCH_FIRST_FP_REGNUM to 35
There is an assertion error "gdb_assert (n < tdesc->reg_defs.size ())"
in find_register_by_number() when gdb connects to gdbserver, this
is because the value of LOONGARCH_LINUX_NUM_GREGSET (45, which contains
10 reserved regs) is different with the number of regs (35, which not
contains 10 reserved regs) in file gdb/features/loongarch/base64.xml.
Add a new macro LOONGARCH_USED_NUM_GREGSET which is defined as 35 to
keep consistent with the gdb/features/loongarch/base64.xml, and then
define LOONGARCH_FIRST_FP_REGNUM as LOONGARCH_USED_NUM_GREGSET so that
all the reg numbers in regcache are consistent with tdesc reg numbers.
Process ./test created; pid = 67683
Listening on port 5678
Remote debugging from host 192.168.1.136, port 6789
gdbserver/regcache.cc:205: A problem internal to GDBserver has been detected.
find_register_by_number: Assertion 'n < tdesc->reg_defs.size ()' failed.
Output on the host machine:
Remote debugging using 192.168.1.123:5678
Remote connection closed
Signed-off-by: Hui Li <lihui@loongson.cn> Approved-By: John Baldwin <jhb@FreeBSD.org> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>