The opcode must be emitted after the REX prefix, not before.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munte...@linux360.ro>
---
arch/x86/emit-code.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/emit-code.c b/arch/x86/emit-code.c
index 26044f3..774402c 100644
--- a/arch/x86/emit-code.c
+++ b/arch/x86/emit-code.c
@@ -1831,8 +1831,6 @@ static void __emit_membase(struct buffer *buf,
needs_sib = (base_reg == REG_RSP);
- emit(buf, opc);
-
if (needs_sib)
rm = 0x04;
else
@@ -1855,6 +1853,8 @@ static void __emit_membase(struct buffer *buf,
if (rex_pfx)
emit(buf, rex_pfx);
+ emit(buf, opc);
+
mod_rm = encode_modrm(mod, reg_opcode, rm);
emit(buf, mod_rm);
--
1.6.0.6
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