* [binutils-gdb] x86: don't allow pseudo-prefixes to be overridden by legacy suffixes
@ 2023-11-17 10:24 Jan Beulich
0 siblings, 0 replies; only message in thread
From: Jan Beulich @ 2023-11-17 10:24 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=97f31cb469f288995d3dcaae406531053dff09fa
commit 97f31cb469f288995d3dcaae406531053dff09fa
Author: Jan Beulich <jbeulich@suse.com>
Date: Fri Nov 17 11:23:50 2023 +0100
x86: don't allow pseudo-prefixes to be overridden by legacy suffixes
Deprecated functionality would better not win over its modern
counterparts.
Diff:
---
gas/config/tc-i386.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 6e788d8ee97..1692dfcdf54 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -5887,16 +5887,32 @@ parse_insn (const char *line, char *mnemonic, bool prefix_only)
Check if we should swap operand or force 32bit displacement in
encoding. */
if (mnem_p - 2 == dot_p && dot_p[1] == 's')
- i.dir_encoding = dir_encoding_swap;
+ {
+ if (i.dir_encoding == dir_encoding_default)
+ i.dir_encoding = dir_encoding_swap;
+ else
+ as_warn (_("ignoring `.s' suffix due to earlier `{%s}'"),
+ i.dir_encoding == dir_encoding_load ? "load" : "store");
+ }
else if (mnem_p - 3 == dot_p
&& dot_p[1] == 'd'
&& dot_p[2] == '8')
- i.disp_encoding = disp_encoding_8bit;
+ {
+ if (i.disp_encoding == disp_encoding_default)
+ i.disp_encoding = disp_encoding_8bit;
+ else if (i.disp_encoding != disp_encoding_8bit)
+ as_warn (_("ignoring `.d8' suffix due to earlier `{disp<N>}'"));
+ }
else if (mnem_p - 4 == dot_p
&& dot_p[1] == 'd'
&& dot_p[2] == '3'
&& dot_p[3] == '2')
- i.disp_encoding = disp_encoding_32bit;
+ {
+ if (i.disp_encoding == disp_encoding_default)
+ i.disp_encoding = disp_encoding_32bit;
+ else if (i.disp_encoding != disp_encoding_32bit)
+ as_warn (_("ignoring `.d32' suffix due to earlier `{disp<N>}'"));
+ }
else
goto check_suffix;
mnem_p = dot_p;
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