From: Jan Beulich <jbeulich@suse.com>
Date: Fri, 21 Jun 2024 06:36:03 +0000 (+0200)
Subject: x86/APX: fix disassembly of byte register operands
X-Git-Tag: binutils-2_43~328
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=87860ef6f4650d513530af4cb4e3e85a863139cf;p=thirdparty%2Fbinutils-gdb.git

x86/APX: fix disassembly of byte register operands

Like for REX/REX2, EVEX-prefixed insns access the low bytes of all
registers; %ah...%bh are inaccessible. Reflect this correctly in output,
by leveraging REX machinery we already have to this effect.
---

diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index 3a1afcc2fce..9c5063eb4cc 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -9004,6 +9004,7 @@ get_valid_dis386 (const struct dis386 *dp, instr_info *ins)
 	  ins->evex_type = evex_from_legacy;
 	  if (ins->address_mode != mode_64bit)
 	    return &bad_opcode;
+	  ins->rex |= REX_OPCODE;
 	  break;
 	case 0x5:
 	  vex_table_index = EVEX_MAP5;