BFIN has lots of instructions that contain "=", so "sym = expression"
is disabled for that target. This makes an exception for assignment
to dot, fixing the recent regression of ld-scripts/pr18963.
* config/tc-bfin.h (TC_EQUAL_IN_INSN): Allow assignment to dot.
Some of the TC_START_LABEL implementations need to adjust the end of
the symbol, when a colon doesn't mean a label definition. That means
they need access to nul_char both the restore the NUL location (it may
be a quote rather than a colon) and to store the new nul_char. Others
need adjusting to step over a potential trailing quote.
PR gas/18581
* config/tc-aarch64.h (TC_START_LABEL): Redefine.
* config/tc-arm.c (tc_start_label_without_colon): Delete params.
Use input_line_pointer directly.
* config/tc-arm.h (TC_START_LABEL): Redefine.
(TC_START_LABEL_WITHOUT_COLON): Redefine.
(tc_start_label_without_colon): Update prototype.
* config/tc-bfin.c (bfin_start_label): Delete ptr param. Check
for NUL instead.
* config/tc-bfin.h (bfin_start_label): Update prototype.
(TC_START_LABEL): Redefine.
* config/tc-d30v.h (TC_START_LABEL): Redefine.
* config/tc-fr30.c (restore_colon): Rewrite.
(fr30_is_colon_insn): Add nul_char param. Return int. Bump
i_l_p over quote. Update restore_colon calls.
* config/tc-fr30.h (TC_START_LABEL): Redefine.
(fr30_is_colon_insn): Update prototype.
* config/tc-m32c.c (restore_colon, m32c_is_colon_insn): As above.
* config/tc-m32c.h (TC_START_LABEL): Redefine.
(m32c_is_colon_insn): Update prototype.
* config/tc-m32r.h (TC_START_LABEL): Redefine.
* config/tc-mep.h (TC_START_LABEL): Redefine.
* config/tc-nds32.h (TC_START_LABEL): Redefine.
* config/tc-tic54x.c (tic54x_start_label): Replace params with
nul_char and next_char. Step over trailing quote.
* config/tc-tic54x.h (TC_START_LABEL_WITHOUT_COLON): Redefine.
(tic54x_start_label): Update prototype.
* read.c (TC_START_LABEL): Redefine. Update invocation.
(TC_START_LABEL_WITHOUT_COLON): Update invocation.
* config/tc-nios2.c (s_nios2_set): Save initial input_line_pointer
and restore if calling s_set. Don't restore delim again.
(read_a_source_file): Pass the beginning of the symbol through
the new argument of TC_START_LABEL.
* config/tc-arm.h (TC_START_LABEL): Add a new argument.
* config/tc-bfin.c (bfin_start_label): Only search '(' and '['
from the beginning of the symbol.
* config/tc-bfin.h (TC_START_LABEL): Add the new argument.
* config/tc-d30v.h (TC_START_LABEL): Likewise.
* config/tc-fr30.h (TC_START_LABEL): Likewise.
* config/tc-m32c.h (TC_START_LABEL): Likewise.
* config/tc-m32r.h (TC_START_LABEL): Likewise.
* config/tc-mep.h (TC_START_LABEL): Likewise.
testsuite/
* gas/bfin/stack2.s: Add pop multiple instruction with a label
on the same line.
* gas/bfin/stack2.d: Adjust accordingly.
