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x86/AT&T: restrict recognition of the "absolute branch" prefix character

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While in principle merely rejecting this for .insn would be sufficient
for the purposes there, be more generic and reject it for anything that
isn't going to be a branch: All elements of same-mnemonic template
groups either are branches, or are not, and the few cases possibly
requiring a 2nd parsing pass aren't affected either. This then also
improves diagnostics for misuses like

	inc	*%eax
	incl	%fs:*(%eax)
	add	*$1, %eax
This commit is contained in:
Jan Beulich
2023-03-20 16:57:42 +01:00
parent 3f155099ad
commit ccb05c9c99
1 changed files with 4 additions and 2 deletions
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6
gas/config/tc-i386.c
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@@ -11423,7 +11423,8 @@ i386_att_operand (char *operand_string)
/* We check for an absolute prefix (differentiating,
for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
if (*op_string == ABSOLUTE_PREFIX)
if (*op_string == ABSOLUTE_PREFIX
&& current_templates->start->opcode_modifier.jump)
{
++op_string;
if (is_space_char (*op_string))
@@ -11454,7 +11455,8 @@ i386_att_operand (char *operand_string)
++op_string;
/* Handle case of %es:*foo. */
if (!i.jumpabsolute && *op_string == ABSOLUTE_PREFIX)
if (!i.jumpabsolute && *op_string == ABSOLUTE_PREFIX
&& current_templates->start->opcode_modifier.jump)
{
++op_string;
if (is_space_char (*op_string))