Change gdbarch_wchar_bit for AArch64 and ARM

The size of wchar_t on AArch64 and ARM is 4-byte, so we can use the
default value (4*TARGET_CHAR_BIT).

This patch fixes some fails in gdb.cp/wide_char_types.exp on
aarch64-linux.

gdb:

2017-04-25  Yao Qi  <yao.qi@linaro.org>

	* aarch64-tdep.c (aarch64_gdbarch_init): Don't call
	set_gdbarch_wchar_bit.
	* arm-tdep.c (arm_gdbarch_init): Likewise.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index af6679ae2dd6a08adf419e3ac47cb687301def0d..2b265a1301bcafe66be7e69490553442fd9a475a 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2017-04-25  Yao Qi  <yao.qi@linaro.org>
+
+       * aarch64-tdep.c (aarch64_gdbarch_init): Don't call
+       set_gdbarch_wchar_bit.
+       * arm-tdep.c (arm_gdbarch_init): Likewise.
+
 2017-04-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
        * aarch64-tdep.c (selftests::aarch64_process_record_test): Make it #if

diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 6113621e8dc115a930087c0474fb694574503b17..d203ebec773a4623827b33c564e187b482532213 100644 (file)
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -2977,7 +2977,6 @@ aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_long_long_bit (gdbarch, 64);
   set_gdbarch_ptr_bit (gdbarch, 64);
   set_gdbarch_char_signed (gdbarch, 0);
-  set_gdbarch_wchar_bit (gdbarch, 64);
   set_gdbarch_wchar_signed (gdbarch, 0);
   set_gdbarch_float_format (gdbarch, floatformats_ieee_single);
   set_gdbarch_double_format (gdbarch, floatformats_ieee_double);

diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 9ac667f990bb1bd7628fc254e09f798eb9831d16..970d19fcc4c64e9bec49526d9bf79117d41ae421 100644 (file)
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -9409,7 +9409,6 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
     set_gdbarch_wchar_signed (gdbarch, 0);
   else
     set_gdbarch_wchar_signed (gdbarch, 1);
-  set_gdbarch_wchar_bit (gdbarch, 32);
 
   /* Note: for displaced stepping, this includes the breakpoint, and one word
      of additional scratch space.  This setting isn't used for anything beside