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-rw-r--r--linux-user/main.c886
1 files changed, 886 insertions, 0 deletions
diff --git a/linux-user/main.c b/linux-user/main.c
new file mode 100644
index 000000000..16def5215
--- /dev/null
+++ b/linux-user/main.c
@@ -0,0 +1,886 @@
+/*
+ * qemu user main
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/units.h"
+#include "qemu/accel.h"
+#include "sysemu/tcg.h"
+#include "qemu-version.h"
+#include <sys/syscall.h>
+#include <sys/resource.h>
+#include <sys/shm.h>
+#include <linux/binfmts.h>
+
+#include "qapi/error.h"
+#include "qemu.h"
+#include "user-internals.h"
+#include "qemu/path.h"
+#include "qemu/queue.h"
+#include "qemu/config-file.h"
+#include "qemu/cutils.h"
+#include "qemu/error-report.h"
+#include "qemu/help_option.h"
+#include "qemu/module.h"
+#include "qemu/plugin.h"
+#include "exec/exec-all.h"
+#include "exec/gdbstub.h"
+#include "tcg/tcg.h"
+#include "qemu/timer.h"
+#include "qemu/envlist.h"
+#include "qemu/guest-random.h"
+#include "elf.h"
+#include "trace/control.h"
+#include "target_elf.h"
+#include "cpu_loop-common.h"
+#include "crypto/init.h"
+#include "fd-trans.h"
+#include "signal-common.h"
+#include "loader.h"
+#include "user-mmap.h"
+
+#ifndef AT_FLAGS_PRESERVE_ARGV0
+#define AT_FLAGS_PRESERVE_ARGV0_BIT 0
+#define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT)
+#endif
+
+char *exec_path;
+
+int singlestep;
+static const char *argv0;
+static const char *gdbstub;
+static envlist_t *envlist;
+static const char *cpu_model;
+static const char *cpu_type;
+static const char *seed_optarg;
+unsigned long mmap_min_addr;
+uintptr_t guest_base;
+bool have_guest_base;
+
+/*
+ * Used to implement backwards-compatibility for the `-strace`, and
+ * QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by
+ * -strace, or vice versa.
+ */
+static bool enable_strace;
+
+/*
+ * The last log mask given by the user in an environment variable or argument.
+ * Used to support command line arguments overriding environment variables.
+ */
+static int last_log_mask;
+
+/*
+ * When running 32-on-64 we should make sure we can fit all of the possible
+ * guest address space into a contiguous chunk of virtual host memory.
+ *
+ * This way we will never overlap with our own libraries or binaries or stack
+ * or anything else that QEMU maps.
+ *
+ * Many cpus reserve the high bit (or more than one for some 64-bit cpus)
+ * of the address for the kernel. Some cpus rely on this and user space
+ * uses the high bit(s) for pointer tagging and the like. For them, we
+ * must preserve the expected address space.
+ */
+#ifndef MAX_RESERVED_VA
+# if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
+# if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \
+ (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32))
+/* There are a number of places where we assign reserved_va to a variable
+ of type abi_ulong and expect it to fit. Avoid the last page. */
+# define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK)
+# else
+# define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS)
+# endif
+# else
+# define MAX_RESERVED_VA(CPU) 0
+# endif
+#endif
+
+unsigned long reserved_va;
+
+static void usage(int exitcode);
+
+static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
+const char *qemu_uname_release;
+
+/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
+ we allocate a bigger stack. Need a better solution, for example
+ by remapping the process stack directly at the right place */
+unsigned long guest_stack_size = 8 * 1024 * 1024UL;
+
+/***********************************************************/
+/* Helper routines for implementing atomic operations. */
+
+/* Make sure everything is in a consistent state for calling fork(). */
+void fork_start(void)
+{
+ start_exclusive();
+ mmap_fork_start();
+ cpu_list_lock();
+}
+
+void fork_end(int child)
+{
+ mmap_fork_end(child);
+ if (child) {
+ CPUState *cpu, *next_cpu;
+ /* Child processes created by fork() only have a single thread.
+ Discard information about the parent threads. */
+ CPU_FOREACH_SAFE(cpu, next_cpu) {
+ if (cpu != thread_cpu) {
+ QTAILQ_REMOVE_RCU(&cpus, cpu, node);
+ }
+ }
+ qemu_init_cpu_list();
+ gdbserver_fork(thread_cpu);
+ /* qemu_init_cpu_list() takes care of reinitializing the
+ * exclusive state, so we don't need to end_exclusive() here.
+ */
+ } else {
+ cpu_list_unlock();
+ end_exclusive();
+ }
+}
+
+__thread CPUState *thread_cpu;
+
+bool qemu_cpu_is_self(CPUState *cpu)
+{
+ return thread_cpu == cpu;
+}
+
+void qemu_cpu_kick(CPUState *cpu)
+{
+ cpu_exit(cpu);
+}
+
+void task_settid(TaskState *ts)
+{
+ if (ts->ts_tid == 0) {
+ ts->ts_tid = (pid_t)syscall(SYS_gettid);
+ }
+}
+
+void stop_all_tasks(void)
+{
+ /*
+ * We trust that when using NPTL, start_exclusive()
+ * handles thread stopping correctly.
+ */
+ start_exclusive();
+}
+
+/* Assumes contents are already zeroed. */
+void init_task_state(TaskState *ts)
+{
+ ts->used = 1;
+ ts->sigaltstack_used = (struct target_sigaltstack) {
+ .ss_sp = 0,
+ .ss_size = 0,
+ .ss_flags = TARGET_SS_DISABLE,
+ };
+}
+
+CPUArchState *cpu_copy(CPUArchState *env)
+{
+ CPUState *cpu = env_cpu(env);
+ CPUState *new_cpu = cpu_create(cpu_type);
+ CPUArchState *new_env = new_cpu->env_ptr;
+ CPUBreakpoint *bp;
+
+ /* Reset non arch specific state */
+ cpu_reset(new_cpu);
+
+ new_cpu->tcg_cflags = cpu->tcg_cflags;
+ memcpy(new_env, env, sizeof(CPUArchState));
+
+ /* Clone all break/watchpoints.
+ Note: Once we support ptrace with hw-debug register access, make sure
+ BP_CPU break/watchpoints are handled correctly on clone. */
+ QTAILQ_INIT(&new_cpu->breakpoints);
+ QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
+ cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL);
+ }
+
+ return new_env;
+}
+
+static void handle_arg_help(const char *arg)
+{
+ usage(EXIT_SUCCESS);
+}
+
+static void handle_arg_log(const char *arg)
+{
+ last_log_mask = qemu_str_to_log_mask(arg);
+ if (!last_log_mask) {
+ qemu_print_log_usage(stdout);
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void handle_arg_dfilter(const char *arg)
+{
+ qemu_set_dfilter_ranges(arg, &error_fatal);
+}
+
+static void handle_arg_log_filename(const char *arg)
+{
+ qemu_set_log_filename(arg, &error_fatal);
+}
+
+static void handle_arg_set_env(const char *arg)
+{
+ char *r, *p, *token;
+ r = p = strdup(arg);
+ while ((token = strsep(&p, ",")) != NULL) {
+ if (envlist_setenv(envlist, token) != 0) {
+ usage(EXIT_FAILURE);
+ }
+ }
+ free(r);
+}
+
+static void handle_arg_unset_env(const char *arg)
+{
+ char *r, *p, *token;
+ r = p = strdup(arg);
+ while ((token = strsep(&p, ",")) != NULL) {
+ if (envlist_unsetenv(envlist, token) != 0) {
+ usage(EXIT_FAILURE);
+ }
+ }
+ free(r);
+}
+
+static void handle_arg_argv0(const char *arg)
+{
+ argv0 = strdup(arg);
+}
+
+static void handle_arg_stack_size(const char *arg)
+{
+ char *p;
+ guest_stack_size = strtoul(arg, &p, 0);
+ if (guest_stack_size == 0) {
+ usage(EXIT_FAILURE);
+ }
+
+ if (*p == 'M') {
+ guest_stack_size *= MiB;
+ } else if (*p == 'k' || *p == 'K') {
+ guest_stack_size *= KiB;
+ }
+}
+
+static void handle_arg_ld_prefix(const char *arg)
+{
+ interp_prefix = strdup(arg);
+}
+
+static void handle_arg_pagesize(const char *arg)
+{
+ qemu_host_page_size = atoi(arg);
+ if (qemu_host_page_size == 0 ||
+ (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
+ fprintf(stderr, "page size must be a power of two\n");
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void handle_arg_seed(const char *arg)
+{
+ seed_optarg = arg;
+}
+
+static void handle_arg_gdb(const char *arg)
+{
+ gdbstub = g_strdup(arg);
+}
+
+static void handle_arg_uname(const char *arg)
+{
+ qemu_uname_release = strdup(arg);
+}
+
+static void handle_arg_cpu(const char *arg)
+{
+ cpu_model = strdup(arg);
+ if (cpu_model == NULL || is_help_option(cpu_model)) {
+ /* XXX: implement xxx_cpu_list for targets that still miss it */
+#if defined(cpu_list)
+ cpu_list();
+#endif
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void handle_arg_guest_base(const char *arg)
+{
+ guest_base = strtol(arg, NULL, 0);
+ have_guest_base = true;
+}
+
+static void handle_arg_reserved_va(const char *arg)
+{
+ char *p;
+ int shift = 0;
+ reserved_va = strtoul(arg, &p, 0);
+ switch (*p) {
+ case 'k':
+ case 'K':
+ shift = 10;
+ break;
+ case 'M':
+ shift = 20;
+ break;
+ case 'G':
+ shift = 30;
+ break;
+ }
+ if (shift) {
+ unsigned long unshifted = reserved_va;
+ p++;
+ reserved_va <<= shift;
+ if (reserved_va >> shift != unshifted) {
+ fprintf(stderr, "Reserved virtual address too big\n");
+ exit(EXIT_FAILURE);
+ }
+ }
+ if (*p) {
+ fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p);
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void handle_arg_singlestep(const char *arg)
+{
+ singlestep = 1;
+}
+
+static void handle_arg_strace(const char *arg)
+{
+ enable_strace = true;
+}
+
+static void handle_arg_version(const char *arg)
+{
+ printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
+ "\n" QEMU_COPYRIGHT "\n");
+ exit(EXIT_SUCCESS);
+}
+
+static void handle_arg_trace(const char *arg)
+{
+ trace_opt_parse(arg);
+}
+
+#if defined(TARGET_XTENSA)
+static void handle_arg_abi_call0(const char *arg)
+{
+ xtensa_set_abi_call0();
+}
+#endif
+
+static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins);
+
+#ifdef CONFIG_PLUGIN
+static void handle_arg_plugin(const char *arg)
+{
+ qemu_plugin_opt_parse(arg, &plugins);
+}
+#endif
+
+struct qemu_argument {
+ const char *argv;
+ const char *env;
+ bool has_arg;
+ void (*handle_opt)(const char *arg);
+ const char *example;
+ const char *help;
+};
+
+static const struct qemu_argument arg_table[] = {
+ {"h", "", false, handle_arg_help,
+ "", "print this help"},
+ {"help", "", false, handle_arg_help,
+ "", ""},
+ {"g", "QEMU_GDB", true, handle_arg_gdb,
+ "port", "wait gdb connection to 'port'"},
+ {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix,
+ "path", "set the elf interpreter prefix to 'path'"},
+ {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size,
+ "size", "set the stack size to 'size' bytes"},
+ {"cpu", "QEMU_CPU", true, handle_arg_cpu,
+ "model", "select CPU (-cpu help for list)"},
+ {"E", "QEMU_SET_ENV", true, handle_arg_set_env,
+ "var=value", "sets targets environment variable (see below)"},
+ {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env,
+ "var", "unsets targets environment variable (see below)"},
+ {"0", "QEMU_ARGV0", true, handle_arg_argv0,
+ "argv0", "forces target process argv[0] to be 'argv0'"},
+ {"r", "QEMU_UNAME", true, handle_arg_uname,
+ "uname", "set qemu uname release string to 'uname'"},
+ {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base,
+ "address", "set guest_base address to 'address'"},
+ {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va,
+ "size", "reserve 'size' bytes for guest virtual address space"},
+ {"d", "QEMU_LOG", true, handle_arg_log,
+ "item[,...]", "enable logging of specified items "
+ "(use '-d help' for a list of items)"},
+ {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter,
+ "range[,...]","filter logging based on address range"},
+ {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename,
+ "logfile", "write logs to 'logfile' (default stderr)"},
+ {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize,
+ "pagesize", "set the host page size to 'pagesize'"},
+ {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep,
+ "", "run in singlestep mode"},
+ {"strace", "QEMU_STRACE", false, handle_arg_strace,
+ "", "log system calls"},
+ {"seed", "QEMU_RAND_SEED", true, handle_arg_seed,
+ "", "Seed for pseudo-random number generator"},
+ {"trace", "QEMU_TRACE", true, handle_arg_trace,
+ "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
+#ifdef CONFIG_PLUGIN
+ {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin,
+ "", "[file=]<file>[,<argname>=<argvalue>]"},
+#endif
+ {"version", "QEMU_VERSION", false, handle_arg_version,
+ "", "display version information and exit"},
+#if defined(TARGET_XTENSA)
+ {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0,
+ "", "assume CALL0 Xtensa ABI"},
+#endif
+ {NULL, NULL, false, NULL, NULL, NULL}
+};
+
+static void usage(int exitcode)
+{
+ const struct qemu_argument *arginfo;
+ int maxarglen;
+ int maxenvlen;
+
+ printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
+ "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n"
+ "\n"
+ "Options and associated environment variables:\n"
+ "\n");
+
+ /* Calculate column widths. We must always have at least enough space
+ * for the column header.
+ */
+ maxarglen = strlen("Argument");
+ maxenvlen = strlen("Env-variable");
+
+ 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 = &regs1;
+ 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;
+ int log_mask;
+ 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);
+
+ log_mask = last_log_mask | (enable_strace ? LOG_STRACE : 0);
+ if (log_mask) {
+ qemu_log_needs_buffers();
+ qemu_set_log(log_mask);
+ }
+
+ 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)) {
+ qemu_log("guest_base %p\n", (void *)guest_base);
+ log_page_dump("binary load");
+
+ qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
+ qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
+ qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code);
+ qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data);
+ qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
+ qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack);
+ qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
+ qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
+ qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start);
+ qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n",
+ info->arg_end + (abi_ulong)sizeof(abi_ulong));
+ qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv);
+ }
+
+ 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);
+ }
+ cpu_loop(env);
+ /* never exits */
+ return 0;
+}