diff options
Diffstat (limited to 'opcodes/i386-dis.c')
| -rw-r--r-- | opcodes/i386-dis.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index 5f49f91993..ada44010de 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -12670,11 +12670,15 @@ get_valid_dis386 (const struct dis386 *dp, disassemble_info *info) rex |= REX_W; vex.register_specifier = (~(*codep >> 3)) & 0xf; - if (address_mode != mode_64bit - && vex.register_specifier > 0x7) + if (address_mode != mode_64bit) { - dp = &bad_opcode; - return dp; + /* In 16/32-bit mode REX_B is silently ignored. */ + rex &= ~REX_B; + if (vex.register_specifier > 0x7) + { + dp = &bad_opcode; + return dp; + } } vex.length = (*codep & 0x4) ? 256 : 128; |