922 lines
26 KiB
C
922 lines
26 KiB
C
/*
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* qemu user main
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/help-texts.h"
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#include "qemu/units.h"
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#include "qemu/accel.h"
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#include "qemu-version.h"
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#include <sys/syscall.h>
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#include <sys/resource.h>
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#include <sys/shm.h>
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#include <linux/binfmts.h>
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#include "qapi/error.h"
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#include "qemu.h"
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#include "user-internals.h"
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#include "qemu/path.h"
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#include "qemu/queue.h"
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#include "qemu/config-file.h"
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#include "qemu/cutils.h"
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#include "qemu/error-report.h"
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#include "qemu/help_option.h"
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#include "qemu/module.h"
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#include "qemu/plugin.h"
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#include "exec/exec-all.h"
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#include "exec/gdbstub.h"
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#include "tcg/tcg.h"
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#include "qemu/timer.h"
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#include "qemu/envlist.h"
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#include "qemu/guest-random.h"
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#include "elf.h"
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#include "trace/control.h"
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#include "target_elf.h"
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#include "cpu_loop-common.h"
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#include "crypto/init.h"
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#include "fd-trans.h"
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#include "signal-common.h"
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#include "loader.h"
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#include "user-mmap.h"
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#ifdef CONFIG_SEMIHOSTING
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#include "semihosting/semihost.h"
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#endif
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#ifndef AT_FLAGS_PRESERVE_ARGV0
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#define AT_FLAGS_PRESERVE_ARGV0_BIT 0
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#define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT)
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#endif
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char *exec_path;
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int singlestep;
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static const char *argv0;
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static const char *gdbstub;
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static envlist_t *envlist;
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static const char *cpu_model;
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static const char *cpu_type;
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static const char *seed_optarg;
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unsigned long mmap_min_addr;
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uintptr_t guest_base;
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bool have_guest_base;
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/*
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* Used to implement backwards-compatibility for the `-strace`, and
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* QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by
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* -strace, or vice versa.
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*/
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static bool enable_strace;
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/*
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* The last log mask given by the user in an environment variable or argument.
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* Used to support command line arguments overriding environment variables.
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*/
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static int last_log_mask;
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static const char *last_log_filename;
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/*
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* When running 32-on-64 we should make sure we can fit all of the possible
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* guest address space into a contiguous chunk of virtual host memory.
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*
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* This way we will never overlap with our own libraries or binaries or stack
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* or anything else that QEMU maps.
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*
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* Many cpus reserve the high bit (or more than one for some 64-bit cpus)
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* of the address for the kernel. Some cpus rely on this and user space
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* uses the high bit(s) for pointer tagging and the like. For them, we
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* must preserve the expected address space.
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*/
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#ifndef MAX_RESERVED_VA
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# if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
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# if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \
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(TARGET_LONG_BITS == 32 || defined(TARGET_ABI32))
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/* There are a number of places where we assign reserved_va to a variable
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of type abi_ulong and expect it to fit. Avoid the last page. */
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# define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK)
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# else
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# define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS)
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# endif
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# else
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# define MAX_RESERVED_VA(CPU) 0
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# endif
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#endif
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unsigned long reserved_va;
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static void usage(int exitcode);
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static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
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const char *qemu_uname_release;
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/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
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we allocate a bigger stack. Need a better solution, for example
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by remapping the process stack directly at the right place */
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unsigned long guest_stack_size = 8 * 1024 * 1024UL;
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/***********************************************************/
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/* Helper routines for implementing atomic operations. */
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/* Make sure everything is in a consistent state for calling fork(). */
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void fork_start(void)
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{
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start_exclusive();
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mmap_fork_start();
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cpu_list_lock();
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}
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void fork_end(int child)
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{
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mmap_fork_end(child);
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if (child) {
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CPUState *cpu, *next_cpu;
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/* Child processes created by fork() only have a single thread.
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Discard information about the parent threads. */
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CPU_FOREACH_SAFE(cpu, next_cpu) {
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if (cpu != thread_cpu) {
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QTAILQ_REMOVE_RCU(&cpus, cpu, node);
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}
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}
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qemu_init_cpu_list();
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gdbserver_fork(thread_cpu);
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/* qemu_init_cpu_list() takes care of reinitializing the
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* exclusive state, so we don't need to end_exclusive() here.
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*/
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} else {
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cpu_list_unlock();
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end_exclusive();
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}
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}
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__thread CPUState *thread_cpu;
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bool qemu_cpu_is_self(CPUState *cpu)
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{
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return thread_cpu == cpu;
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}
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void qemu_cpu_kick(CPUState *cpu)
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{
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cpu_exit(cpu);
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}
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void task_settid(TaskState *ts)
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{
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if (ts->ts_tid == 0) {
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ts->ts_tid = (pid_t)syscall(SYS_gettid);
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}
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}
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void stop_all_tasks(void)
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{
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/*
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* We trust that when using NPTL, start_exclusive()
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* handles thread stopping correctly.
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*/
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start_exclusive();
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}
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/* Assumes contents are already zeroed. */
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void init_task_state(TaskState *ts)
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{
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long ticks_per_sec;
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struct timespec bt;
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ts->used = 1;
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ts->sigaltstack_used = (struct target_sigaltstack) {
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.ss_sp = 0,
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.ss_size = 0,
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.ss_flags = TARGET_SS_DISABLE,
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};
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/* Capture task start time relative to system boot */
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ticks_per_sec = sysconf(_SC_CLK_TCK);
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if ((ticks_per_sec > 0) && !clock_gettime(CLOCK_BOOTTIME, &bt)) {
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/* start_boottime is expressed in clock ticks */
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ts->start_boottime = bt.tv_sec * (uint64_t) ticks_per_sec;
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ts->start_boottime += bt.tv_nsec * (uint64_t) ticks_per_sec /
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NANOSECONDS_PER_SECOND;
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}
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}
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CPUArchState *cpu_copy(CPUArchState *env)
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{
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CPUState *cpu = env_cpu(env);
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CPUState *new_cpu = cpu_create(cpu_type);
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CPUArchState *new_env = new_cpu->env_ptr;
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CPUBreakpoint *bp;
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/* Reset non arch specific state */
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cpu_reset(new_cpu);
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new_cpu->tcg_cflags = cpu->tcg_cflags;
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memcpy(new_env, env, sizeof(CPUArchState));
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/* Clone all break/watchpoints.
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Note: Once we support ptrace with hw-debug register access, make sure
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BP_CPU break/watchpoints are handled correctly on clone. */
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QTAILQ_INIT(&new_cpu->breakpoints);
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QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
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cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL);
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}
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return new_env;
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}
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static void handle_arg_help(const char *arg)
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{
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usage(EXIT_SUCCESS);
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}
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static void handle_arg_log(const char *arg)
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{
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last_log_mask = qemu_str_to_log_mask(arg);
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if (!last_log_mask) {
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qemu_print_log_usage(stdout);
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exit(EXIT_FAILURE);
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}
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}
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static void handle_arg_dfilter(const char *arg)
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{
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qemu_set_dfilter_ranges(arg, &error_fatal);
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}
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static void handle_arg_log_filename(const char *arg)
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{
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last_log_filename = arg;
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}
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static void handle_arg_set_env(const char *arg)
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{
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char *r, *p, *token;
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r = p = strdup(arg);
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while ((token = strsep(&p, ",")) != NULL) {
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if (envlist_setenv(envlist, token) != 0) {
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usage(EXIT_FAILURE);
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}
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}
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free(r);
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}
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static void handle_arg_unset_env(const char *arg)
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{
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char *r, *p, *token;
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r = p = strdup(arg);
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while ((token = strsep(&p, ",")) != NULL) {
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if (envlist_unsetenv(envlist, token) != 0) {
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usage(EXIT_FAILURE);
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}
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}
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free(r);
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}
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static void handle_arg_argv0(const char *arg)
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{
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argv0 = strdup(arg);
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}
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static void handle_arg_stack_size(const char *arg)
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{
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char *p;
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guest_stack_size = strtoul(arg, &p, 0);
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if (guest_stack_size == 0) {
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usage(EXIT_FAILURE);
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}
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if (*p == 'M') {
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guest_stack_size *= MiB;
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} else if (*p == 'k' || *p == 'K') {
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guest_stack_size *= KiB;
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}
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}
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static void handle_arg_ld_prefix(const char *arg)
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{
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interp_prefix = strdup(arg);
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}
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static void handle_arg_pagesize(const char *arg)
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{
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qemu_host_page_size = atoi(arg);
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if (qemu_host_page_size == 0 ||
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(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
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fprintf(stderr, "page size must be a power of two\n");
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exit(EXIT_FAILURE);
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}
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}
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static void handle_arg_seed(const char *arg)
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{
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seed_optarg = arg;
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}
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static void handle_arg_gdb(const char *arg)
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{
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gdbstub = g_strdup(arg);
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}
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static void handle_arg_uname(const char *arg)
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{
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qemu_uname_release = strdup(arg);
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}
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static void handle_arg_cpu(const char *arg)
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{
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cpu_model = strdup(arg);
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if (cpu_model == NULL || is_help_option(cpu_model)) {
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/* XXX: implement xxx_cpu_list for targets that still miss it */
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#if defined(cpu_list)
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cpu_list();
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#endif
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exit(EXIT_FAILURE);
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}
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}
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static void handle_arg_guest_base(const char *arg)
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{
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guest_base = strtol(arg, NULL, 0);
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have_guest_base = true;
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}
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static void handle_arg_reserved_va(const char *arg)
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{
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char *p;
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int shift = 0;
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reserved_va = strtoul(arg, &p, 0);
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switch (*p) {
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case 'k':
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case 'K':
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shift = 10;
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break;
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case 'M':
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shift = 20;
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break;
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case 'G':
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shift = 30;
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break;
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}
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if (shift) {
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unsigned long unshifted = reserved_va;
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p++;
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reserved_va <<= shift;
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if (reserved_va >> shift != unshifted) {
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fprintf(stderr, "Reserved virtual address too big\n");
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exit(EXIT_FAILURE);
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}
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}
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if (*p) {
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fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p);
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exit(EXIT_FAILURE);
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}
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}
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static void handle_arg_singlestep(const char *arg)
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{
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singlestep = 1;
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}
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static void handle_arg_strace(const char *arg)
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{
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enable_strace = true;
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}
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static void handle_arg_version(const char *arg)
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{
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printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
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"\n" QEMU_COPYRIGHT "\n");
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exit(EXIT_SUCCESS);
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}
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static void handle_arg_trace(const char *arg)
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{
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trace_opt_parse(arg);
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}
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#if defined(TARGET_XTENSA)
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static void handle_arg_abi_call0(const char *arg)
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{
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xtensa_set_abi_call0();
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}
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#endif
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static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins);
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#ifdef CONFIG_PLUGIN
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static void handle_arg_plugin(const char *arg)
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{
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qemu_plugin_opt_parse(arg, &plugins);
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}
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#endif
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struct qemu_argument {
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const char *argv;
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const char *env;
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bool has_arg;
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void (*handle_opt)(const char *arg);
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const char *example;
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const char *help;
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};
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static const struct qemu_argument arg_table[] = {
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{"h", "", false, handle_arg_help,
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"", "print this help"},
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{"help", "", false, handle_arg_help,
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"", ""},
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{"g", "QEMU_GDB", true, handle_arg_gdb,
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"port", "wait gdb connection to 'port'"},
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{"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix,
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"path", "set the elf interpreter prefix to 'path'"},
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{"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size,
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"size", "set the stack size to 'size' bytes"},
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{"cpu", "QEMU_CPU", true, handle_arg_cpu,
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"model", "select CPU (-cpu help for list)"},
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{"E", "QEMU_SET_ENV", true, handle_arg_set_env,
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"var=value", "sets targets environment variable (see below)"},
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{"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env,
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"var", "unsets targets environment variable (see below)"},
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{"0", "QEMU_ARGV0", true, handle_arg_argv0,
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"argv0", "forces target process argv[0] to be 'argv0'"},
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{"r", "QEMU_UNAME", true, handle_arg_uname,
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"uname", "set qemu uname release string to 'uname'"},
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{"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base,
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"address", "set guest_base address to 'address'"},
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{"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va,
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"size", "reserve 'size' bytes for guest virtual address space"},
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{"d", "QEMU_LOG", true, handle_arg_log,
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"item[,...]", "enable logging of specified items "
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"(use '-d help' for a list of items)"},
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{"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter,
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"range[,...]","filter logging based on address range"},
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{"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename,
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"logfile", "write logs to 'logfile' (default stderr)"},
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{"p", "QEMU_PAGESIZE", true, handle_arg_pagesize,
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"pagesize", "set the host page size to 'pagesize'"},
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{"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep,
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"", "run in singlestep mode"},
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{"strace", "QEMU_STRACE", false, handle_arg_strace,
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"", "log system calls"},
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{"seed", "QEMU_RAND_SEED", true, handle_arg_seed,
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"", "Seed for pseudo-random number generator"},
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{"trace", "QEMU_TRACE", true, handle_arg_trace,
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"", "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
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#ifdef CONFIG_PLUGIN
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{"plugin", "QEMU_PLUGIN", true, handle_arg_plugin,
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"", "[file=]<file>[,<argname>=<argvalue>]"},
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#endif
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{"version", "QEMU_VERSION", false, handle_arg_version,
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"", "display version information and exit"},
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#if defined(TARGET_XTENSA)
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{"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0,
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"", "assume CALL0 Xtensa ABI"},
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#endif
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{NULL, NULL, false, NULL, NULL, NULL}
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};
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|
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static void usage(int exitcode)
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{
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const struct qemu_argument *arginfo;
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int maxarglen;
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int maxenvlen;
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|
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printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
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"Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n"
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"\n"
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"Options and associated environment variables:\n"
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"\n");
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|
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/* Calculate column widths. We must always have at least enough space
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* for the column header.
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*/
|
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maxarglen = strlen("Argument");
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maxenvlen = strlen("Env-variable");
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|
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for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
|
|
int arglen = strlen(arginfo->argv);
|
|
if (arginfo->has_arg) {
|
|
arglen += strlen(arginfo->example) + 1;
|
|
}
|
|
if (strlen(arginfo->env) > maxenvlen) {
|
|
maxenvlen = strlen(arginfo->env);
|
|
}
|
|
if (arglen > maxarglen) {
|
|
maxarglen = arglen;
|
|
}
|
|
}
|
|
|
|
printf("%-*s %-*s Description\n", maxarglen+1, "Argument",
|
|
maxenvlen, "Env-variable");
|
|
|
|
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
|
|
if (arginfo->has_arg) {
|
|
printf("-%s %-*s %-*s %s\n", arginfo->argv,
|
|
(int)(maxarglen - strlen(arginfo->argv) - 1),
|
|
arginfo->example, maxenvlen, arginfo->env, arginfo->help);
|
|
} else {
|
|
printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv,
|
|
maxenvlen, arginfo->env,
|
|
arginfo->help);
|
|
}
|
|
}
|
|
|
|
printf("\n"
|
|
"Defaults:\n"
|
|
"QEMU_LD_PREFIX = %s\n"
|
|
"QEMU_STACK_SIZE = %ld byte\n",
|
|
interp_prefix,
|
|
guest_stack_size);
|
|
|
|
printf("\n"
|
|
"You can use -E and -U options or the QEMU_SET_ENV and\n"
|
|
"QEMU_UNSET_ENV environment variables to set and unset\n"
|
|
"environment variables for the target process.\n"
|
|
"It is possible to provide several variables by separating them\n"
|
|
"by commas in getsubopt(3) style. Additionally it is possible to\n"
|
|
"provide the -E and -U options multiple times.\n"
|
|
"The following lines are equivalent:\n"
|
|
" -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
|
|
" -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n"
|
|
" QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n"
|
|
"Note that if you provide several changes to a single variable\n"
|
|
"the last change will stay in effect.\n"
|
|
"\n"
|
|
QEMU_HELP_BOTTOM "\n");
|
|
|
|
exit(exitcode);
|
|
}
|
|
|
|
static int parse_args(int argc, char **argv)
|
|
{
|
|
const char *r;
|
|
int optind;
|
|
const struct qemu_argument *arginfo;
|
|
|
|
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
|
|
if (arginfo->env == NULL) {
|
|
continue;
|
|
}
|
|
|
|
r = getenv(arginfo->env);
|
|
if (r != NULL) {
|
|
arginfo->handle_opt(r);
|
|
}
|
|
}
|
|
|
|
optind = 1;
|
|
for (;;) {
|
|
if (optind >= argc) {
|
|
break;
|
|
}
|
|
r = argv[optind];
|
|
if (r[0] != '-') {
|
|
break;
|
|
}
|
|
optind++;
|
|
r++;
|
|
if (!strcmp(r, "-")) {
|
|
break;
|
|
}
|
|
/* Treat --foo the same as -foo. */
|
|
if (r[0] == '-') {
|
|
r++;
|
|
}
|
|
|
|
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
|
|
if (!strcmp(r, arginfo->argv)) {
|
|
if (arginfo->has_arg) {
|
|
if (optind >= argc) {
|
|
(void) fprintf(stderr,
|
|
"qemu: missing argument for option '%s'\n", r);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
arginfo->handle_opt(argv[optind]);
|
|
optind++;
|
|
} else {
|
|
arginfo->handle_opt(NULL);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* no option matched the current argv */
|
|
if (arginfo->handle_opt == NULL) {
|
|
(void) fprintf(stderr, "qemu: unknown option '%s'\n", r);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
if (optind >= argc) {
|
|
(void) fprintf(stderr, "qemu: no user program specified\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
exec_path = argv[optind];
|
|
|
|
return optind;
|
|
}
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
struct target_pt_regs regs1, *regs = ®s1;
|
|
struct image_info info1, *info = &info1;
|
|
struct linux_binprm bprm;
|
|
TaskState *ts;
|
|
CPUArchState *env;
|
|
CPUState *cpu;
|
|
int optind;
|
|
char **target_environ, **wrk;
|
|
char **target_argv;
|
|
int target_argc;
|
|
int i;
|
|
int ret;
|
|
int execfd;
|
|
unsigned long max_reserved_va;
|
|
bool preserve_argv0;
|
|
|
|
error_init(argv[0]);
|
|
module_call_init(MODULE_INIT_TRACE);
|
|
qemu_init_cpu_list();
|
|
module_call_init(MODULE_INIT_QOM);
|
|
|
|
envlist = envlist_create();
|
|
|
|
/* add current environment into the list */
|
|
for (wrk = environ; *wrk != NULL; wrk++) {
|
|
(void) envlist_setenv(envlist, *wrk);
|
|
}
|
|
|
|
/* Read the stack limit from the kernel. If it's "unlimited",
|
|
then we can do little else besides use the default. */
|
|
{
|
|
struct rlimit lim;
|
|
if (getrlimit(RLIMIT_STACK, &lim) == 0
|
|
&& lim.rlim_cur != RLIM_INFINITY
|
|
&& lim.rlim_cur == (target_long)lim.rlim_cur) {
|
|
guest_stack_size = lim.rlim_cur;
|
|
}
|
|
}
|
|
|
|
cpu_model = NULL;
|
|
|
|
qemu_add_opts(&qemu_trace_opts);
|
|
qemu_plugin_add_opts();
|
|
|
|
optind = parse_args(argc, argv);
|
|
|
|
qemu_set_log_filename_flags(last_log_filename,
|
|
last_log_mask | (enable_strace * LOG_STRACE),
|
|
&error_fatal);
|
|
|
|
if (!trace_init_backends()) {
|
|
exit(1);
|
|
}
|
|
trace_init_file();
|
|
qemu_plugin_load_list(&plugins, &error_fatal);
|
|
|
|
/* Zero out regs */
|
|
memset(regs, 0, sizeof(struct target_pt_regs));
|
|
|
|
/* Zero out image_info */
|
|
memset(info, 0, sizeof(struct image_info));
|
|
|
|
memset(&bprm, 0, sizeof (bprm));
|
|
|
|
/* Scan interp_prefix dir for replacement files. */
|
|
init_paths(interp_prefix);
|
|
|
|
init_qemu_uname_release();
|
|
|
|
/*
|
|
* Manage binfmt-misc open-binary flag
|
|
*/
|
|
execfd = qemu_getauxval(AT_EXECFD);
|
|
if (execfd == 0) {
|
|
execfd = open(exec_path, O_RDONLY);
|
|
if (execfd < 0) {
|
|
printf("Error while loading %s: %s\n", exec_path, strerror(errno));
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* get binfmt_misc flags
|
|
*/
|
|
preserve_argv0 = !!(qemu_getauxval(AT_FLAGS) & AT_FLAGS_PRESERVE_ARGV0);
|
|
|
|
/*
|
|
* Manage binfmt-misc preserve-arg[0] flag
|
|
* argv[optind] full path to the binary
|
|
* argv[optind + 1] original argv[0]
|
|
*/
|
|
if (optind + 1 < argc && preserve_argv0) {
|
|
optind++;
|
|
}
|
|
|
|
if (cpu_model == NULL) {
|
|
cpu_model = cpu_get_model(get_elf_eflags(execfd));
|
|
}
|
|
cpu_type = parse_cpu_option(cpu_model);
|
|
|
|
/* init tcg before creating CPUs and to get qemu_host_page_size */
|
|
{
|
|
AccelClass *ac = ACCEL_GET_CLASS(current_accel());
|
|
|
|
accel_init_interfaces(ac);
|
|
ac->init_machine(NULL);
|
|
}
|
|
cpu = cpu_create(cpu_type);
|
|
env = cpu->env_ptr;
|
|
cpu_reset(cpu);
|
|
thread_cpu = cpu;
|
|
|
|
/*
|
|
* Reserving too much vm space via mmap can run into problems
|
|
* with rlimits, oom due to page table creation, etc. We will
|
|
* still try it, if directed by the command-line option, but
|
|
* not by default.
|
|
*/
|
|
max_reserved_va = MAX_RESERVED_VA(cpu);
|
|
if (reserved_va != 0) {
|
|
if (max_reserved_va && reserved_va > max_reserved_va) {
|
|
fprintf(stderr, "Reserved virtual address too big\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) {
|
|
/*
|
|
* reserved_va must be aligned with the host page size
|
|
* as it is used with mmap()
|
|
*/
|
|
reserved_va = max_reserved_va & qemu_host_page_mask;
|
|
}
|
|
|
|
{
|
|
Error *err = NULL;
|
|
if (seed_optarg != NULL) {
|
|
qemu_guest_random_seed_main(seed_optarg, &err);
|
|
} else {
|
|
qcrypto_init(&err);
|
|
}
|
|
if (err) {
|
|
error_reportf_err(err, "cannot initialize crypto: ");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
target_environ = envlist_to_environ(envlist, NULL);
|
|
envlist_free(envlist);
|
|
|
|
/*
|
|
* Read in mmap_min_addr kernel parameter. This value is used
|
|
* When loading the ELF image to determine whether guest_base
|
|
* is needed. It is also used in mmap_find_vma.
|
|
*/
|
|
{
|
|
FILE *fp;
|
|
|
|
if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
|
|
unsigned long tmp;
|
|
if (fscanf(fp, "%lu", &tmp) == 1 && tmp != 0) {
|
|
mmap_min_addr = tmp;
|
|
qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n",
|
|
mmap_min_addr);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We prefer to not make NULL pointers accessible to QEMU.
|
|
* If we're in a chroot with no /proc, fall back to 1 page.
|
|
*/
|
|
if (mmap_min_addr == 0) {
|
|
mmap_min_addr = qemu_host_page_size;
|
|
qemu_log_mask(CPU_LOG_PAGE,
|
|
"host mmap_min_addr=0x%lx (fallback)\n",
|
|
mmap_min_addr);
|
|
}
|
|
|
|
/*
|
|
* Prepare copy of argv vector for target.
|
|
*/
|
|
target_argc = argc - optind;
|
|
target_argv = calloc(target_argc + 1, sizeof (char *));
|
|
if (target_argv == NULL) {
|
|
(void) fprintf(stderr, "Unable to allocate memory for target_argv\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/*
|
|
* If argv0 is specified (using '-0' switch) we replace
|
|
* argv[0] pointer with the given one.
|
|
*/
|
|
i = 0;
|
|
if (argv0 != NULL) {
|
|
target_argv[i++] = strdup(argv0);
|
|
}
|
|
for (; i < target_argc; i++) {
|
|
target_argv[i] = strdup(argv[optind + i]);
|
|
}
|
|
target_argv[target_argc] = NULL;
|
|
|
|
ts = g_new0(TaskState, 1);
|
|
init_task_state(ts);
|
|
/* build Task State */
|
|
ts->info = info;
|
|
ts->bprm = &bprm;
|
|
cpu->opaque = ts;
|
|
task_settid(ts);
|
|
|
|
fd_trans_init();
|
|
|
|
ret = loader_exec(execfd, exec_path, target_argv, target_environ, regs,
|
|
info, &bprm);
|
|
if (ret != 0) {
|
|
printf("Error while loading %s: %s\n", exec_path, strerror(-ret));
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
for (wrk = target_environ; *wrk; wrk++) {
|
|
g_free(*wrk);
|
|
}
|
|
|
|
g_free(target_environ);
|
|
|
|
if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
|
|
FILE *f = qemu_log_trylock();
|
|
if (f) {
|
|
fprintf(f, "guest_base %p\n", (void *)guest_base);
|
|
fprintf(f, "page layout changed following binary load\n");
|
|
page_dump(f);
|
|
|
|
fprintf(f, "start_brk 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->start_brk);
|
|
fprintf(f, "end_code 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->end_code);
|
|
fprintf(f, "start_code 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->start_code);
|
|
fprintf(f, "start_data 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->start_data);
|
|
fprintf(f, "end_data 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->end_data);
|
|
fprintf(f, "start_stack 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->start_stack);
|
|
fprintf(f, "brk 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->brk);
|
|
fprintf(f, "entry 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->entry);
|
|
fprintf(f, "argv_start 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->argv);
|
|
fprintf(f, "env_start 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->envp);
|
|
fprintf(f, "auxv_start 0x" TARGET_ABI_FMT_lx "\n",
|
|
info->saved_auxv);
|
|
qemu_log_unlock(f);
|
|
}
|
|
}
|
|
|
|
target_set_brk(info->brk);
|
|
syscall_init();
|
|
signal_init();
|
|
|
|
/* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
|
|
generating the prologue until now so that the prologue can take
|
|
the real value of GUEST_BASE into account. */
|
|
tcg_prologue_init(tcg_ctx);
|
|
|
|
target_cpu_copy_regs(env, regs);
|
|
|
|
if (gdbstub) {
|
|
if (gdbserver_start(gdbstub) < 0) {
|
|
fprintf(stderr, "qemu: could not open gdbserver on %s\n",
|
|
gdbstub);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
gdb_handlesig(cpu, 0);
|
|
}
|
|
|
|
#ifdef CONFIG_SEMIHOSTING
|
|
qemu_semihosting_guestfd_init();
|
|
#endif
|
|
|
|
cpu_loop(env);
|
|
/* never exits */
|
|
return 0;
|
|
}
|