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

debugexit.c (2352B)

      1/*
      2 * debug exit port emulation
      3 *
      4 * This program is free software; you can redistribute it and/or
      5 * modify it under the terms of the GNU General Public License as
      6 * published by the Free Software Foundation; either version 2 or
      7 * (at your option) any later version.
      8 */
      9
     10#include "qemu/osdep.h"
     11#include "hw/isa/isa.h"
     12#include "hw/qdev-properties.h"
     13#include "qemu/module.h"
     14#include "qom/object.h"
     15
     16#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
     17OBJECT_DECLARE_SIMPLE_TYPE(ISADebugExitState, ISA_DEBUG_EXIT_DEVICE)
     18
     19struct ISADebugExitState {
     20    ISADevice parent_obj;
     21
     22    uint32_t iobase;
     23    uint32_t iosize;
     24    MemoryRegion io;
     25};
     26
     27static uint64_t debug_exit_read(void *opaque, hwaddr addr, unsigned size)
     28{
     29    return 0;
     30}
     31
     32static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
     33                             unsigned width)
     34{
     35    exit((val << 1) | 1);
     36}
     37
     38static const MemoryRegionOps debug_exit_ops = {
     39    .read = debug_exit_read,
     40    .write = debug_exit_write,
     41    .valid.min_access_size = 1,
     42    .valid.max_access_size = 4,
     43    .endianness = DEVICE_LITTLE_ENDIAN,
     44};
     45
     46static void debug_exit_realizefn(DeviceState *d, Error **errp)
     47{
     48    ISADevice *dev = ISA_DEVICE(d);
     49    ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
     50
     51    memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
     52                          TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
     53    memory_region_add_subregion(isa_address_space_io(dev),
     54                                isa->iobase, &isa->io);
     55}
     56
     57static Property debug_exit_properties[] = {
     58    DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
     59    DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
     60    DEFINE_PROP_END_OF_LIST(),
     61};
     62
     63static void debug_exit_class_initfn(ObjectClass *klass, void *data)
     64{
     65    DeviceClass *dc = DEVICE_CLASS(klass);
     66
     67    dc->realize = debug_exit_realizefn;
     68    device_class_set_props(dc, debug_exit_properties);
     69    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     70}
     71
     72static const TypeInfo debug_exit_info = {
     73    .name          = TYPE_ISA_DEBUG_EXIT_DEVICE,
     74    .parent        = TYPE_ISA_DEVICE,
     75    .instance_size = sizeof(ISADebugExitState),
     76    .class_init    = debug_exit_class_initfn,
     77};
     78
     79static void debug_exit_register_types(void)
     80{
     81    type_register_static(&debug_exit_info);
     82}
     83
     84type_init(debug_exit_register_types)