unicorn/qemu/cpus.c
Peter Maydell 51369b67cd
exec.c: Allow target CPUs to define multiple AddressSpaces
Allow multiple calls to cpu_address_space_init(); each
call adds an entry to the cpu->ases array at the specified
index. It is up to the target-specific CPU code to actually use
these extra address spaces.

Since this multiple AddressSpace support won't work with
KVM, add an assertion to avoid confusing failures.

Backports commit 12ebc9a76dd7702aef0a3618717a826c19c34ef4 from qemu
2018-02-17 22:35:13 -05:00

220 lines
5.5 KiB
C

/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"
#include "sysemu/sysemu.h"
#include "sysemu/cpus.h"
#include "qemu/thread.h"
#include "exec/address-spaces.h" // debug, can be removed later
#include "uc_priv.h"
static bool cpu_can_run(CPUState *cpu);
static void cpu_handle_guest_debug(CPUState *cpu);
static int tcg_cpu_exec(struct uc_struct *uc, CPUState *cpu);
static bool tcg_exec_all(struct uc_struct* uc);
static int qemu_tcg_init_vcpu(CPUState *cpu);
static void *qemu_tcg_cpu_loop(struct uc_struct *uc);
int vm_start(struct uc_struct* uc)
{
if (resume_all_vcpus(uc)) {
return -1;
}
return 0;
}
bool cpu_is_stopped(CPUState *cpu)
{
return cpu->stopped;
}
void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data)
{
func(data);
}
int resume_all_vcpus(struct uc_struct *uc)
{
CPUState *cpu = uc->cpu;
// Fix call multiple time (vu).
// We have to check whether this is the second time, then reset all CPU.
if (!cpu->created) {
cpu->created = true;
cpu->halted = 0;
if (qemu_init_vcpu(cpu))
return -1;
}
//qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true);
cpu_resume(cpu);
qemu_tcg_cpu_loop(uc);
return 0;
}
int qemu_init_vcpu(CPUState *cpu)
{
cpu->nr_cores = smp_cores;
cpu->nr_threads = smp_threads;
cpu->stopped = true;
if (tcg_enabled(cpu->uc))
return qemu_tcg_init_vcpu(cpu);
return 0;
}
static void *qemu_tcg_cpu_loop(struct uc_struct *uc)
{
CPUState *cpu = uc->cpu;
//qemu_tcg_init_cpu_signals();
cpu->created = true;
while (1) {
if (tcg_exec_all(uc))
break;
}
cpu->created = false;
return NULL;
}
static int qemu_tcg_init_vcpu(CPUState *cpu)
{
if (!cpu->as) {
/* If the target cpu hasn't set up any address spaces itself,
* give it the default one.
*/
cpu->num_ases = 1;
cpu_address_space_init(cpu, &cpu->uc->as, 0);
}
return 0;
}
static int tcg_cpu_exec(struct uc_struct *uc, CPUState *cpu)
{
return cpu_exec(uc, cpu);
}
static bool tcg_exec_all(struct uc_struct* uc)
{
int r;
bool finish = false;
while (!uc->exit_request) {
CPUState *cpu = uc->cpu;
CPUArchState *env = cpu->env_ptr;
//qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
// (cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
if (cpu_can_run(cpu)) {
uc->quit_request = false;
r = tcg_cpu_exec(uc, cpu);
// quit current TB but continue emulating?
if (uc->quit_request) {
// reset stop_request
uc->stop_request = false;
} else if (uc->stop_request) {
//printf(">>> got STOP request!!!\n");
finish = true;
break;
}
// save invalid memory access error & quit
if (env->invalid_error) {
// printf(">>> invalid memory accessed, STOP = %u!!!\n", env->invalid_error);
uc->invalid_addr = env->invalid_addr;
uc->invalid_error = env->invalid_error;
finish = true;
break;
}
// printf(">>> stop with r = %x, HLT=%x\n", r, EXCP_HLT);
if (r == EXCP_DEBUG) {
cpu_handle_guest_debug(cpu);
break;
}
if (r == EXCP_HLT) {
//printf(">>> got HLT!!!\n");
finish = true;
break;
}
} else if (cpu->stop || cpu->stopped) {
printf(">>> got stopped!!!\n");
break;
}
}
uc->exit_request = 0;
return finish;
}
static bool cpu_can_run(CPUState *cpu)
{
if (cpu->stop) {
return false;
}
if (cpu_is_stopped(cpu)) {
return false;
}
return true;
}
static void cpu_handle_guest_debug(CPUState *cpu)
{
cpu->stopped = true;
}
#if 0
#ifndef _WIN32
static void qemu_tcg_init_cpu_signals(void)
{
sigset_t set;
struct sigaction sigact;
memset(&sigact, 0, sizeof(sigact));
sigact.sa_handler = cpu_signal;
sigaction(SIG_IPI, &sigact, NULL);
sigemptyset(&set);
sigaddset(&set, SIG_IPI);
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
}
#else /* _WIN32 */
static void qemu_tcg_init_cpu_signals(void)
{
}
#endif /* _WIN32 */
#endif