cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

mem.c (4038B)

      1/*
      2 * Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
      3 *
      4 * License: GNU GPL, version 2 or later.
      5 *   See the COPYING file in the top-level directory.
      6 */
      7#include <inttypes.h>
      8#include <assert.h>
      9#include <stdlib.h>
     10#include <string.h>
     11#include <unistd.h>
     12#include <stdio.h>
     13#include <glib.h>
     14
     15#include <qemu-plugin.h>
     16
     17QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
     18
     19static uint64_t inline_mem_count;
     20static uint64_t cb_mem_count;
     21static uint64_t io_count;
     22static bool do_inline, do_callback;
     23static bool do_haddr;
     24static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
     25
     26static void plugin_exit(qemu_plugin_id_t id, void *p)
     27{
     28    g_autoptr(GString) out = g_string_new("");
     29
     30    if (do_inline) {
     31        g_string_printf(out, "inline mem accesses: %" PRIu64 "\n", inline_mem_count);
     32    }
     33    if (do_callback) {
     34        g_string_append_printf(out, "callback mem accesses: %" PRIu64 "\n", cb_mem_count);
     35    }
     36    if (do_haddr) {
     37        g_string_append_printf(out, "io accesses: %" PRIu64 "\n", io_count);
     38    }
     39    qemu_plugin_outs(out->str);
     40}
     41
     42static void vcpu_mem(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo,
     43                     uint64_t vaddr, void *udata)
     44{
     45    if (do_haddr) {
     46        struct qemu_plugin_hwaddr *hwaddr;
     47        hwaddr = qemu_plugin_get_hwaddr(meminfo, vaddr);
     48        if (qemu_plugin_hwaddr_is_io(hwaddr)) {
     49            io_count++;
     50        } else {
     51            cb_mem_count++;
     52        }
     53    } else {
     54        cb_mem_count++;
     55    }
     56}
     57
     58static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
     59{
     60    size_t n = qemu_plugin_tb_n_insns(tb);
     61    size_t i;
     62
     63    for (i = 0; i < n; i++) {
     64        struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
     65
     66        if (do_inline) {
     67            qemu_plugin_register_vcpu_mem_inline(insn, rw,
     68                                                 QEMU_PLUGIN_INLINE_ADD_U64,
     69                                                 &inline_mem_count, 1);
     70        }
     71        if (do_callback) {
     72            qemu_plugin_register_vcpu_mem_cb(insn, vcpu_mem,
     73                                             QEMU_PLUGIN_CB_NO_REGS,
     74                                             rw, NULL);
     75        }
     76    }
     77}
     78
     79QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
     80                                           const qemu_info_t *info,
     81                                           int argc, char **argv)
     82{
     83
     84    for (int i = 0; i < argc; i++) {
     85        char *opt = argv[i];
     86        g_autofree char **tokens = g_strsplit(opt, "=", 2);
     87
     88        if (g_strcmp0(tokens[0], "haddr") == 0) {
     89            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_haddr)) {
     90                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
     91                return -1;
     92            }
     93        } else if (g_strcmp0(tokens[0], "track") == 0) {
     94            if (g_strcmp0(tokens[1], "r") == 0) {
     95                rw = QEMU_PLUGIN_MEM_R;
     96            } else if (g_strcmp0(tokens[1], "w") == 0) {
     97                rw = QEMU_PLUGIN_MEM_W;
     98            } else if (g_strcmp0(tokens[1], "rw") == 0) {
     99                rw = QEMU_PLUGIN_MEM_RW;
    100            } else {
    101                fprintf(stderr, "invaild value for argument track: %s\n", opt);
    102                return -1;
    103            }
    104        } else if (g_strcmp0(tokens[0], "inline") == 0) {
    105            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
    106                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
    107                return -1;
    108            }
    109        } else if (g_strcmp0(tokens[0], "callback") == 0) {
    110            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_callback)) {
    111                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
    112                return -1;
    113            }
    114        } else {
    115            fprintf(stderr, "option parsing failed: %s\n", opt);
    116            return -1;
    117        }
    118    }
    119
    120    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
    121    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
    122    return 0;
    123}