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 d1c1942adbbb98b680896bc6210e608e97749dbf..90ce6aef75c30575e3b42c51f4376b43e92165c1 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.
+
 2017-04-25  Pedro Alves  <palves@redhat.com>
 
        * common/poison.h [!HAVE_IS_TRIVIALLY_COPYABLE] (IsRelocatable)

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