[PATCH 02/22] Arm64: drop .bss override

[Jan Beulich <jbeulich@suse.com>]

The comment looks bogus (perhaps simply stale, perhaps wrongly copied
from Arm in the first place), and there are also no other precautions
against subsections being used on ELF with .bss. It also doesn't look
to be a good idea to override the custom handlers that ELF and COFF
have (afaict doing so further broke .previous on ELF).

As to the mapping state update - such also doesn't appear to be done
for other section switching, so its original purpose was at best
questionable as well.

--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -1866,17 +1866,7 @@ mapping_state_2 (enum mstate state, int
 #define mapping_state_2(x, y)	/* nothing */
 #endif
 
-/* Directives: sectioning and alignment.  */
-
-static void
-s_bss (int ignore ATTRIBUTE_UNUSED)
-{
-  /* We don't support putting frags in the BSS segment, we fake it by
-     marking in_bss, then looking at s_skip for clues.  */
-  subseg_set (bss_section, 0);
-  demand_empty_rest_of_line ();
-  mapping_state (MAP_DATA);
-}
+/* Directives: alignment.  */
 
 static void
 s_even (int ignore ATTRIBUTE_UNUSED)
@@ -2396,7 +2386,6 @@ const pseudo_typeS md_pseudo_table[] = {
   /* Never called because '.req' does not start a line.  */
   {"req", s_req, 0},
   {"unreq", s_unreq, 0},
-  {"bss", s_bss, 0},
   {"even", s_even, 0},
   {"ltorg", s_ltorg, 0},
   {"pool", s_ltorg, 0},
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -389,11 +389,6 @@ extensions by the @option{-mcpu} command
 incrementally to the architecture being compiled for.
 
 @c BBBBBBBBBBBBBBBBBBBBBBBBBB
-
-@cindex @code{.bss} directive, AArch64
-@item .bss
-This directive switches to the @code{.bss} section.
-
 @c CCCCCCCCCCCCCCCCCCCCCCCCCC
 
 @cindex @code{.cpu} directive, AArch64