#include "dr_api.h"
#include "dr_ir_opcodes_x86.h"

static dr_emit_flags_t event_basic_block(void *drcontext, void *tag,
                                         instrlist_t *bb, bool for_trace, bool translating);

DR_EXPORT void dr_client_main(client_id_t id, int argc, const char *argv[]) {
    dr_set_client_name("MOV-to-NOP Client (No drmgr)", "https://dynamorio.org/");
    dr_register_bb_event(event_basic_block);
    dr_printf("MOV-to-NOP client loaded (no drmgr).\n");
}

static dr_emit_flags_t event_basic_block(void *drcontext, void *tag,
                                         instrlist_t *bb, bool for_trace, bool translating) {
    for (instr_t *instr = instrlist_first_app(bb);
         instr != NULL;
         instr = instr_get_next_app(instr)) {

        int opcode = instr_get_opcode(instr);
        if (opcode == OP_mov_st || opcode == OP_mov_ld) {
            instr_set_opcode(instr, OP_nop);
        }
    }

    return DR_EMIT_DEFAULT;
}