Support native TCG vector read/write operations in LibAFL hooks (#64)

* Support rw vector operations

Author: rmalmain

tcg/tcg-op-ldst.c

@@ -31,6 +31,12 @@
 #include "exec/plugin-gen.h"
 #include "tcg-internal.h"
 
+//// --- Begin LibAFL code ---
+
+void libafl_gen_read(TCGTemp *addr, MemOpIdx oi);
+void libafl_gen_write(TCGTemp *addr, MemOpIdx oi);
+
+//// --- End LibAFL code ---
 
 static void check_max_alignment(unsigned a_bits)
 {
@@ -175,13 +181,6 @@ plugin_gen_mem_callbacks(TCGv_i64 copy_addr, TCGTemp *orig_addr, MemOpIdx oi,
 #endif
 }
 
-//// --- Begin LibAFL code ---
-
-void libafl_gen_read(TCGTemp *addr, MemOpIdx oi);
-void libafl_gen_write(TCGTemp *addr, MemOpIdx oi);
-
-//// --- End LibAFL code ---
-
 static void tcg_gen_qemu_ld_i32_int(TCGv_i32 val, TCGTemp *addr,
                                     TCGArg idx, MemOp memop)
 {

tcg/tcg-op-vec.c

@@ -24,6 +24,13 @@
 #include "tcg/tcg-mo.h"
 #include "tcg-internal.h"
 
+//// --- Begin LibAFL code ---
+
+void libafl_gen_read(TCGTemp *addr, MemOpIdx oi);
+void libafl_gen_write(TCGTemp *addr, MemOpIdx oi);
+
+//// --- End LibAFL code ---
+
 /*
  * Vector optional opcode tracking.
  * Except for the basic logical operations (and, or, xor), and
@@ -276,12 +283,34 @@ static void vec_gen_ldst(TCGOpcode opc, TCGv_vec r, TCGv_ptr b, TCGArg o)
 
 void tcg_gen_ld_vec(TCGv_vec r, TCGv_ptr b, TCGArg o)
 {
+//// --- Begin LibAFL code ---
+    TCGArg ri = tcgv_vec_arg(r);
+    TCGTemp *rt = arg_temp(ri);
+    TCGType type = rt->base_type;
+    MemOpIdx oi = make_memop_idx((type - TCG_TYPE_V64) + MO_64, 0);
+//// --- End LibAFL code ---
+
     vec_gen_ldst(INDEX_op_ld_vec, r, b, o);
+
+//// --- Begin LibAFL code ---
+    libafl_gen_read(tcgv_ptr_temp(b), oi);
+//// --- End LibAFL code ---
 }
 
 void tcg_gen_st_vec(TCGv_vec r, TCGv_ptr b, TCGArg o)
 {
+//// --- Begin LibAFL code ---
+    TCGArg ri = tcgv_vec_arg(r);
+    TCGTemp *rt = arg_temp(ri);
+    TCGType type = rt->base_type;
+    MemOpIdx oi = make_memop_idx((type - TCG_TYPE_V64) + MO_64, 0);
+//// --- End LibAFL code ---
+
     vec_gen_ldst(INDEX_op_st_vec, r, b, o);
+
+//// --- Begin LibAFL code ---
+    libafl_gen_write(tcgv_ptr_temp(b), oi);
+//// --- End LibAFL code ---
 }
 
 void tcg_gen_stl_vec(TCGv_vec r, TCGv_ptr b, TCGArg o, TCGType low_type)