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-rw-r--r--bsd-user/main.c566
1 files changed, 566 insertions, 0 deletions
diff --git a/bsd-user/main.c b/bsd-user/main.c
new file mode 100644
index 000000000..cb5ea4023
--- /dev/null
+++ b/bsd-user/main.c
@@ -0,0 +1,566 @@
+/*
+ * qemu bsd user main
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2013-14 Stacey Son
+ *
+ * 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 <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/sysctl.h>
+
+#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 <machine/trap.h>
+
+#include "qapi/error.h"
+#include "qemu.h"
+#include "qemu/config-file.h"
+#include "qemu/error-report.h"
+#include "qemu/path.h"
+#include "qemu/help_option.h"
+#include "qemu/module.h"
+#include "exec/exec-all.h"
+#include "tcg/tcg.h"
+#include "qemu/timer.h"
+#include "qemu/envlist.h"
+#include "qemu/cutils.h"
+#include "exec/log.h"
+#include "trace/control.h"
+#include "crypto/init.h"
+#include "qemu/guest-random.h"
+
+#include "host-os.h"
+#include "target_arch_cpu.h"
+
+int singlestep;
+uintptr_t guest_base;
+bool have_guest_base;
+/*
+ * 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 (0xfffffffful & TARGET_PAGE_MASK)
+# else
+# define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS)
+# endif
+# else
+# define MAX_RESERVED_VA 0
+# endif
+#endif
+
+/*
+ * That said, 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.
+ */
+#if HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32
+unsigned long reserved_va = MAX_RESERVED_VA;
+#else
+unsigned long reserved_va;
+#endif
+
+static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
+const char *qemu_uname_release;
+enum BSDType bsd_type;
+char qemu_proc_pathname[PATH_MAX]; /* full path to exeutable */
+
+unsigned long target_maxtsiz = TARGET_MAXTSIZ; /* max text size */
+unsigned long target_dfldsiz = TARGET_DFLDSIZ; /* initial data size limit */
+unsigned long target_maxdsiz = TARGET_MAXDSIZ; /* max data size */
+unsigned long target_dflssiz = TARGET_DFLSSIZ; /* initial data size limit */
+unsigned long target_maxssiz = TARGET_MAXSSIZ; /* max stack size */
+unsigned long target_sgrowsiz = TARGET_SGROWSIZ; /* amount to grow stack */
+
+/* Helper routines for implementing atomic operations. */
+
+void fork_start(void)
+{
+ start_exclusive();
+ cpu_list_lock();
+ mmap_fork_start();
+}
+
+void fork_end(int 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);
+ }
+ }
+ mmap_fork_end(child);
+ /*
+ * qemu_init_cpu_list() takes care of reinitializing the exclusive
+ * state, so we don't need to end_exclusive() here.
+ */
+ qemu_init_cpu_list();
+ gdbserver_fork(thread_cpu);
+ } else {
+ mmap_fork_end(child);
+ cpu_list_unlock();
+ end_exclusive();
+ }
+}
+
+void cpu_loop(CPUArchState *env)
+{
+ target_cpu_loop(env);
+}
+
+static void usage(void)
+{
+ printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
+ "\n" QEMU_COPYRIGHT "\n"
+ "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
+ "BSD CPU emulator (compiled for %s emulation)\n"
+ "\n"
+ "Standard options:\n"
+ "-h print this help\n"
+ "-g port wait gdb connection to port\n"
+ "-L path set the elf interpreter prefix (default=%s)\n"
+ "-s size set the stack size in bytes (default=%ld)\n"
+ "-cpu model select CPU (-cpu help for list)\n"
+ "-drop-ld-preload drop LD_PRELOAD for target process\n"
+ "-E var=value sets/modifies targets environment variable(s)\n"
+ "-U var unsets targets environment variable(s)\n"
+ "-B address set guest_base address to address\n"
+ "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
+ "\n"
+ "Debug options:\n"
+ "-d item1[,...] enable logging of specified items\n"
+ " (use '-d help' for a list of log items)\n"
+ "-D logfile write logs to 'logfile' (default stderr)\n"
+ "-singlestep always run in singlestep mode\n"
+ "-strace log system calls\n"
+ "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
+ " specify tracing options\n"
+ "\n"
+ "Environment variables:\n"
+ "QEMU_STRACE Print system calls and arguments similar to the\n"
+ " 'strace' program. Enable by setting to any value.\n"
+ "You can use -E and -U options to set/unset environment variables\n"
+ "for target process. It is possible to provide several variables\n"
+ "by repeating the option. For example:\n"
+ " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
+ "Note that if you provide several changes to single variable\n"
+ "last change will stay in effect.\n"
+ "\n"
+ QEMU_HELP_BOTTOM "\n"
+ ,
+ TARGET_NAME,
+ interp_prefix,
+ target_dflssiz);
+ exit(1);
+}
+
+__thread CPUState *thread_cpu;
+
+void stop_all_tasks(void)
+{
+ /*
+ * We trust when using NPTL (pthreads) start_exclusive() handles thread
+ * stopping correctly.
+ */
+ start_exclusive();
+}
+
+bool qemu_cpu_is_self(CPUState *cpu)
+{
+ return thread_cpu == cpu;
+}
+
+void qemu_cpu_kick(CPUState *cpu)
+{
+ cpu_exit(cpu);
+}
+
+/* Assumes contents are already zeroed. */
+void init_task_state(TaskState *ts)
+{
+ int i;
+
+ ts->first_free = ts->sigqueue_table;
+ for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
+ ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
+ }
+ ts->sigqueue_table[i].next = NULL;
+}
+
+void gemu_log(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+}
+
+static void
+adjust_ssize(void)
+{
+ struct rlimit rl;
+
+ if (getrlimit(RLIMIT_STACK, &rl) != 0) {
+ return;
+ }
+
+ target_maxssiz = MIN(target_maxssiz, rl.rlim_max);
+ target_dflssiz = MIN(MAX(target_dflssiz, rl.rlim_cur), target_maxssiz);
+
+ rl.rlim_max = target_maxssiz;
+ rl.rlim_cur = target_dflssiz;
+ setrlimit(RLIMIT_STACK, &rl);
+}
+
+static void save_proc_pathname(char *argv0)
+{
+ int mib[4];
+ size_t len;
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PROC;
+ mib[2] = KERN_PROC_PATHNAME;
+ mib[3] = -1;
+
+ len = sizeof(qemu_proc_pathname);
+ if (sysctl(mib, 4, qemu_proc_pathname, &len, NULL, 0)) {
+ perror("sysctl");
+ }
+}
+
+int main(int argc, char **argv)
+{
+ const char *filename;
+ const char *cpu_model;
+ const char *cpu_type;
+ const char *log_file = NULL;
+ const char *log_mask = NULL;
+ const char *seed_optarg = NULL;
+ struct target_pt_regs regs1, *regs = &regs1;
+ struct image_info info1, *info = &info1;
+ struct bsd_binprm bprm;
+ TaskState *ts;
+ CPUArchState *env;
+ CPUState *cpu;
+ int optind, rv;
+ const char *r;
+ const char *gdbstub = NULL;
+ char **target_environ, **wrk;
+ envlist_t *envlist = NULL;
+ bsd_type = HOST_DEFAULT_BSD_TYPE;
+ char *argv0 = NULL;
+
+ adjust_ssize();
+
+ if (argc <= 1) {
+ usage();
+ }
+
+ save_proc_pathname(argv[0]);
+
+ 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);
+ }
+
+ cpu_model = NULL;
+
+ qemu_add_opts(&qemu_trace_opts);
+
+ optind = 1;
+ for (;;) {
+ if (optind >= argc) {
+ break;
+ }
+ r = argv[optind];
+ if (r[0] != '-') {
+ break;
+ }
+ optind++;
+ r++;
+ if (!strcmp(r, "-")) {
+ break;
+ } else if (!strcmp(r, "d")) {
+ if (optind >= argc) {
+ break;
+ }
+ log_mask = argv[optind++];
+ } else if (!strcmp(r, "D")) {
+ if (optind >= argc) {
+ break;
+ }
+ log_file = argv[optind++];
+ } else if (!strcmp(r, "E")) {
+ r = argv[optind++];
+ if (envlist_setenv(envlist, r) != 0) {
+ usage();
+ }
+ } else if (!strcmp(r, "ignore-environment")) {
+ envlist_free(envlist);
+ envlist = envlist_create();
+ } else if (!strcmp(r, "U")) {
+ r = argv[optind++];
+ if (envlist_unsetenv(envlist, r) != 0) {
+ usage();
+ }
+ } else if (!strcmp(r, "s")) {
+ r = argv[optind++];
+ rv = qemu_strtoul(r, &r, 0, &target_dflssiz);
+ if (rv < 0 || target_dflssiz <= 0) {
+ usage();
+ }
+ if (*r == 'M') {
+ target_dflssiz *= 1024 * 1024;
+ } else if (*r == 'k' || *r == 'K') {
+ target_dflssiz *= 1024;
+ }
+ if (target_dflssiz > target_maxssiz) {
+ usage();
+ }
+ } else if (!strcmp(r, "L")) {
+ interp_prefix = argv[optind++];
+ } else if (!strcmp(r, "p")) {
+ qemu_host_page_size = atoi(argv[optind++]);
+ 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(1);
+ }
+ } else if (!strcmp(r, "g")) {
+ gdbstub = g_strdup(argv[optind++]);
+ } else if (!strcmp(r, "r")) {
+ qemu_uname_release = argv[optind++];
+ } else if (!strcmp(r, "cpu")) {
+ cpu_model = argv[optind++];
+ if (is_help_option(cpu_model)) {
+ /* XXX: implement xxx_cpu_list for targets that still miss it */
+#if defined(cpu_list)
+ cpu_list();
+#endif
+ exit(1);
+ }
+ } else if (!strcmp(r, "B")) {
+ rv = qemu_strtoul(argv[optind++], NULL, 0, &guest_base);
+ if (rv < 0) {
+ usage();
+ }
+ have_guest_base = true;
+ } else if (!strcmp(r, "drop-ld-preload")) {
+ (void) envlist_unsetenv(envlist, "LD_PRELOAD");
+ } else if (!strcmp(r, "bsd")) {
+ if (!strcasecmp(argv[optind], "freebsd")) {
+ bsd_type = target_freebsd;
+ } else if (!strcasecmp(argv[optind], "netbsd")) {
+ bsd_type = target_netbsd;
+ } else if (!strcasecmp(argv[optind], "openbsd")) {
+ bsd_type = target_openbsd;
+ } else {
+ usage();
+ }
+ optind++;
+ } else if (!strcmp(r, "seed")) {
+ seed_optarg = optarg;
+ } else if (!strcmp(r, "singlestep")) {
+ singlestep = 1;
+ } else if (!strcmp(r, "strace")) {
+ do_strace = 1;
+ } else if (!strcmp(r, "trace")) {
+ trace_opt_parse(optarg);
+ } else if (!strcmp(r, "0")) {
+ argv0 = argv[optind++];
+ } else {
+ usage();
+ }
+ }
+
+ /* init debug */
+ qemu_log_needs_buffers();
+ qemu_set_log_filename(log_file, &error_fatal);
+ if (log_mask) {
+ int mask;
+
+ mask = qemu_str_to_log_mask(log_mask);
+ if (!mask) {
+ qemu_print_log_usage(stdout);
+ exit(1);
+ }
+ qemu_set_log(mask);
+ }
+
+ if (optind >= argc) {
+ usage();
+ }
+ filename = argv[optind];
+ if (argv0) {
+ argv[optind] = argv0;
+ }
+
+ if (!trace_init_backends()) {
+ exit(1);
+ }
+ trace_init_file();
+
+ /* Zero out regs */
+ memset(regs, 0, sizeof(struct target_pt_regs));
+
+ /* Zero bsd params */
+ memset(&bprm, 0, sizeof(bprm));
+
+ /* Zero out image_info */
+ memset(info, 0, sizeof(struct image_info));
+
+ /* Scan interp_prefix dir for replacement files. */
+ init_paths(interp_prefix);
+
+ if (cpu_model == NULL) {
+ cpu_model = TARGET_DEFAULT_CPU_MODEL;
+ }
+
+ 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;
+
+ if (getenv("QEMU_STRACE")) {
+ do_strace = 1;
+ }
+
+ target_environ = envlist_to_environ(envlist, NULL);
+ envlist_free(envlist);
+
+ if (reserved_va) {
+ mmap_next_start = reserved_va;
+ }
+
+ {
+ 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);
+ }
+ }
+
+ /*
+ * Now that page sizes are configured we can do
+ * proper page alignment for guest_base.
+ */
+ guest_base = HOST_PAGE_ALIGN(guest_base);
+
+ if (loader_exec(filename, argv + optind, target_environ, regs, info,
+ &bprm) != 0) {
+ printf("Error loading %s\n", filename);
+ _exit(1);
+ }
+
+ 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);
+ }
+
+ /* build Task State */
+ ts = g_new0(TaskState, 1);
+ init_task_state(ts);
+ ts->info = info;
+ ts->bprm = &bprm;
+ cpu->opaque = ts;
+
+ 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_init(env, regs);
+
+ if (gdbstub) {
+ gdbserver_start(gdbstub);
+ gdb_handlesig(cpu, 0);
+ }
+ cpu_loop(env);
+ /* never exits */
+ return 0;
+}