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| author | Jan Beulich <jbeulich@suse.com> | 2020-06-25 09:26:28 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2020-06-25 09:26:28 +0200 |
| commit | 0b9404fd37c99dc322ae0502d8af6f7c07eb558d (patch) | |
| tree | d2f79f5d2542a54661f86905da615730ab7fdb41 /gas/config | |
| parent | a5aeccd9d33b8cea1ca9145fdeb1be4978cadaeb (diff) | |
| download | fsf-binutils-gdb-0b9404fd37c99dc322ae0502d8af6f7c07eb558d.zip fsf-binutils-gdb-0b9404fd37c99dc322ae0502d8af6f7c07eb558d.tar.gz fsf-binutils-gdb-0b9404fd37c99dc322ae0502d8af6f7c07eb558d.tar.bz2 | |
x86-64: REX prefix is invalid with VEX etc
Just like for the data size prefix (see commit 7a8655d2bbdc ["x86: don't
abort() upon DATA16 prefix on (E)VEX encoded insn"]), any form of REX
prefix is invalid with VEX/XOP/EVEX.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-i386.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index c84192e..f1a7a34 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -4893,10 +4893,20 @@ md_assemble (char *line) return; } + /* Check for explicit REX prefix. */ + if (i.prefix[REX_PREFIX] || i.rex_encoding) + { + as_bad (_("REX prefix invalid with `%s'"), i.tm.name); + return; + } + if (i.tm.opcode_modifier.vex) build_vex_prefix (t); else build_evex_prefix (); + + /* The individual REX.RXBW bits got consumed. */ + i.rex &= REX_OPCODE; } /* Handle conversion of 'int $3' --> special int3 insn. XOP or FMA4 @@ -9275,9 +9285,6 @@ output_insn (void) if (*q) switch (j) { - case REX_PREFIX: - /* REX byte is encoded in VEX prefix. */ - break; case SEG_PREFIX: case ADDR_PREFIX: FRAG_APPEND_1_CHAR (*q); |