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

boot.c (3245B)

      1/*
      2 * CRIS image loading.
      3 *
      4 * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a copy
      7 * of this software and associated documentation files (the "Software"), to deal
      8 * in the Software without restriction, including without limitation the rights
      9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10 * copies of the Software, and to permit persons to whom the Software is
     11 * furnished to do so, subject to the following conditions:
     12 *
     13 * The above copyright notice and this permission notice shall be included in
     14 * all copies or substantial portions of the Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22 * THE SOFTWARE.
     23 */
     24
     25#include "qemu/osdep.h"
     26#include "cpu.h"
     27#include "hw/loader.h"
     28#include "elf.h"
     29#include "boot.h"
     30#include "qemu/cutils.h"
     31#include "sysemu/reset.h"
     32
     33static void main_cpu_reset(void *opaque)
     34{
     35    CRISCPU *cpu = opaque;
     36    CPUCRISState *env = &cpu->env;
     37    struct cris_load_info *li;
     38
     39    li = env->load_info;
     40
     41    cpu_reset(CPU(cpu));
     42
     43    if (!li) {
     44        /* nothing more to do.  */
     45        return;
     46    }
     47
     48    env->pc = li->entry;
     49
     50    if (li->image_filename) {
     51        env->regs[8] = 0x56902387; /* RAM boot magic.  */
     52        env->regs[9] = 0x40004000 + li->image_size;
     53    }
     54
     55    if (li->cmdline) {
     56        /* Let the kernel know we are modifying the cmdline.  */
     57        env->regs[10] = 0x87109563;
     58        env->regs[11] = 0x40000000;
     59    }
     60}
     61
     62static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
     63{
     64    return addr - 0x80000000LL;
     65}
     66
     67void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
     68{
     69    CPUCRISState *env = &cpu->env;
     70    uint64_t entry;
     71    int kcmdline_len;
     72    int image_size;
     73
     74    env->load_info = li;
     75    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
     76       devboard SDK.  */
     77    image_size = load_elf(li->image_filename, NULL,
     78                          translate_kernel_address, NULL,
     79                          &entry, NULL, NULL, NULL, 0, EM_CRIS, 0, 0);
     80    li->entry = entry;
     81    if (image_size < 0) {
     82        /* Takes a kimage from the axis devboard SDK.  */
     83        image_size = load_image_targphys(li->image_filename, 0x40004000,
     84                                         li->ram_size);
     85        li->entry = 0x40004000;
     86    }
     87
     88    if (image_size < 0) {
     89        fprintf(stderr, "qemu: could not load kernel '%s'\n",
     90                li->image_filename);
     91        exit(1);
     92    }
     93
     94    if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
     95        if (kcmdline_len > 256) {
     96            fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
     97            exit(1);
     98        }
     99        pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);
    100    }
    101    qemu_register_reset(main_cpu_reset, cpu);
    102}