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gdbserver: Add LoongArch/Linux support

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Implement LoongArch/Linux support, including XML target description
handling based on features determined, GPR regset support, and software
breakpoint handling.

In the Linux kernel code of LoongArch, ptrace implements PTRACE_POKEUSR
and PTRACE_PEEKUSR in the arch_ptrace function, so srv_linux_usrregs is
set to yes.

With this patch on LoongArch:

  $ make check-gdb TESTS="gdb.server/server-connect.exp"
  [...]
  # of expected passes		18
  [...]

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
This commit is contained in:
Youling Tang
2022-05-30 20:08:30 +08:00
committed by Tiezhu Yang
parent 476288fa2b
commit e5ab6af52d
6 changed files with 280 additions and 1 deletions
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6
gdbserver/configure.srv
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@@ -126,6 +126,12 @@ case "${gdbserver_host}" in
srv_tgtobj="$srv_linux_obj linux-ia64-low.o"
srv_linux_usrregs=yes
;;
loongarch*-*-linux*) srv_tgtobj="arch/loongarch.o linux-loongarch-low.o"
srv_tgtobj="${srv_tgtobj} ${srv_linux_obj}"
srv_linux_regsets=yes
srv_linux_usrregs=yes
srv_linux_thread_db=yes
;;
m68*-*-linux*) if test "$gdb_cv_m68k_is_coldfire" = yes; then
srv_regobj=reg-cf.o
else