diff options
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 530 |
1 files changed, 368 insertions, 162 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index a0aba9cb1e..94e4c47f05 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -16,40 +16,84 @@ * 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/help-texts.h" #include "qemu/units.h" +#include "qemu/accel.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 "cpu.h" +#include "qemu/module.h" +#include "qemu/plugin.h" +#include "user/guest-base.h" #include "exec/exec-all.h" -#include "tcg.h" +#include "exec/gdbstub.h" +#include "gdbstub/user.h" +#include "tcg/startup.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" +#include "tcg/perf.h" +#include "exec/page-vary.h" + +#ifdef CONFIG_SEMIHOSTING +#include "semihosting/semihost.h" +#endif + +#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; +char real_exec_path[PATH_MAX]; -int singlestep; -static const char *filename; +static bool opt_one_insn_per_tb; static const char *argv0; -static int gdbstub_port; +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; -unsigned long guest_base; -int have_guest_base; +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; +static const char *last_log_filename; /* * When running 32-on-64 we should make sure we can fit all of the possible @@ -67,14 +111,12 @@ int have_guest_base; # 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) +# define MAX_RESERVED_VA(CPU) 0xfffffffful # else -# define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS) +# define MAX_RESERVED_VA(CPU) ((1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1) # endif # else -# define MAX_RESERVED_VA 0 +# define MAX_RESERVED_VA(CPU) 0 # endif #endif @@ -85,27 +127,15 @@ static void usage(int exitcode); static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; const char *qemu_uname_release; +#if !defined(TARGET_DEFAULT_STACK_SIZE) /* 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; - -void gemu_log(const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); -} - -#if defined(TARGET_I386) -int cpu_get_pic_interrupt(CPUX86State *env) -{ - return -1; -} +#define TARGET_DEFAULT_STACK_SIZE 8 * 1024 * 1024UL #endif +unsigned long guest_stack_size = TARGET_DEFAULT_STACK_SIZE; + /***********************************************************/ /* Helper routines for implementing atomic operations. */ @@ -115,10 +145,15 @@ void fork_start(void) start_exclusive(); mmap_fork_start(); cpu_list_lock(); + qemu_plugin_user_prefork_lock(); + gdbserver_fork_start(); } -void fork_end(int child) +void fork_end(pid_t pid) { + bool child = pid == 0; + + qemu_plugin_user_postfork(child); mmap_fork_end(child); if (child) { CPUState *cpu, *next_cpu; @@ -126,18 +161,21 @@ void fork_end(int child) Discard information about the parent threads. */ CPU_FOREACH_SAFE(cpu, next_cpu) { if (cpu != thread_cpu) { - QTAILQ_REMOVE_RCU(&cpus, cpu, node); + QTAILQ_REMOVE_RCU(&cpus_queue, 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. - */ + get_task_state(thread_cpu)->ts_tid = qemu_get_thread_id(); } else { cpu_list_unlock(); - end_exclusive(); } + gdbserver_fork_end(thread_cpu, pid); + /* + * qemu_init_cpu_list() reinitialized the child exclusive state, but we + * also need to keep current_cpu consistent, so call end_exclusive() for + * both child and parent. + */ + end_exclusive(); } __thread CPUState *thread_cpu; @@ -171,33 +209,56 @@ void stop_all_tasks(void) /* Assumes contents are already zeroed. */ void init_task_state(TaskState *ts) { + long ticks_per_sec; + struct timespec bt; + ts->used = 1; + ts->sigaltstack_used = (struct target_sigaltstack) { + .ss_sp = 0, + .ss_size = 0, + .ss_flags = TARGET_SS_DISABLE, + }; + + /* Capture task start time relative to system boot */ + + ticks_per_sec = sysconf(_SC_CLK_TCK); + + if ((ticks_per_sec > 0) && !clock_gettime(CLOCK_BOOTTIME, &bt)) { + /* start_boottime is expressed in clock ticks */ + ts->start_boottime = bt.tv_sec * (uint64_t) ticks_per_sec; + ts->start_boottime += bt.tv_nsec * (uint64_t) ticks_per_sec / + NANOSECONDS_PER_SECOND; + } } CPUArchState *cpu_copy(CPUArchState *env) { - CPUState *cpu = ENV_GET_CPU(env); + CPUState *cpu = env_cpu(env); CPUState *new_cpu = cpu_create(cpu_type); - CPUArchState *new_env = new_cpu->env_ptr; + CPUArchState *new_env = cpu_env(new_cpu); CPUBreakpoint *bp; - CPUWatchpoint *wp; /* Reset non arch specific state */ cpu_reset(new_cpu); + new_cpu->tcg_cflags = cpu->tcg_cflags; memcpy(new_env, env, sizeof(CPUArchState)); +#if defined(TARGET_I386) || defined(TARGET_X86_64) + new_env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, + PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + memcpy(g2h_untagged(new_env->gdt.base), g2h_untagged(env->gdt.base), + sizeof(uint64_t) * TARGET_GDT_ENTRIES); + OBJECT(new_cpu)->free = OBJECT(cpu)->free; +#endif /* 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_INIT(&new_cpu->watchpoints); QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); } - QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { - cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); - } return new_env; } @@ -209,25 +270,21 @@ static void handle_arg_help(const char *arg) static void handle_arg_log(const char *arg) { - int mask; - - mask = qemu_str_to_log_mask(arg); - if (!mask) { + last_log_mask = qemu_str_to_log_mask(arg); + if (!last_log_mask) { qemu_print_log_usage(stdout); exit(EXIT_FAILURE); } - qemu_log_needs_buffers(); - qemu_set_log(mask); } static void handle_arg_dfilter(const char *arg) { - qemu_set_dfilter_ranges(arg, NULL); + qemu_set_dfilter_ranges(arg, &error_fatal); } static void handle_arg_log_filename(const char *arg) { - qemu_set_log_filename(arg, &error_fatal); + last_log_filename = arg; } static void handle_arg_set_env(const char *arg) @@ -281,28 +338,22 @@ static void handle_arg_ld_prefix(const char *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); + unsigned size, want = qemu_real_host_page_size(); + + if (qemu_strtoui(arg, NULL, 10, &size) || size != want) { + warn_report("Deprecated page size option cannot " + "change host page size (%u)", want); } } -static void handle_arg_randseed(const char *arg) +static void handle_arg_seed(const char *arg) { - unsigned long long seed; - - if (parse_uint_full(arg, &seed, 0) != 0 || seed > UINT_MAX) { - fprintf(stderr, "Invalid seed number: %s\n", arg); - exit(EXIT_FAILURE); - } - srand(seed); + seed_optarg = arg; } static void handle_arg_gdb(const char *arg) { - gdbstub_port = atoi(arg); + gdbstub = g_strdup(arg); } static void handle_arg_uname(const char *arg) @@ -314,10 +365,7 @@ 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(stdout, &fprintf); -#endif + list_cpus(); exit(EXIT_FAILURE); } } @@ -325,14 +373,16 @@ static void handle_arg_cpu(const char *arg) static void handle_arg_guest_base(const char *arg) { guest_base = strtol(arg, NULL, 0); - have_guest_base = 1; + have_guest_base = true; } static void handle_arg_reserved_va(const char *arg) { char *p; int shift = 0; - reserved_va = strtoul(arg, &p, 0); + unsigned long val; + + val = strtoul(arg, &p, 0); switch (*p) { case 'k': case 'K': @@ -346,11 +396,10 @@ static void handle_arg_reserved_va(const char *arg) break; } if (shift) { - unsigned long unshifted = reserved_va; + unsigned long unshifted = val; p++; - reserved_va <<= shift; - if (reserved_va >> shift != unshifted - || (MAX_RESERVED_VA && reserved_va > MAX_RESERVED_VA)) { + val <<= shift; + if (val >> shift != unshifted) { fprintf(stderr, "Reserved virtual address too big\n"); exit(EXIT_FAILURE); } @@ -359,16 +408,18 @@ static void handle_arg_reserved_va(const char *arg) fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); exit(EXIT_FAILURE); } + /* The representation is size - 1, with 0 remaining "default". */ + reserved_va = val ? val - 1 : 0; } -static void handle_arg_singlestep(const char *arg) +static void handle_arg_one_insn_per_tb(const char *arg) { - singlestep = 1; + opt_one_insn_per_tb = true; } static void handle_arg_strace(const char *arg) { - do_strace = 1; + enable_strace = true; } static void handle_arg_version(const char *arg) @@ -378,13 +429,37 @@ static void handle_arg_version(const char *arg) exit(EXIT_SUCCESS); } -static char *trace_file; static void handle_arg_trace(const char *arg) { - g_free(trace_file); - trace_file = trace_opt_parse(arg); + trace_opt_parse(arg); } +#if defined(TARGET_XTENSA) +static void handle_arg_abi_call0(const char *arg) +{ + xtensa_set_abi_call0(); +} +#endif + +static void handle_arg_perfmap(const char *arg) +{ + perf_enable_perfmap(); +} + +static void handle_arg_jitdump(const char *arg) +{ + perf_enable_jitdump(); +} + +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; @@ -427,17 +502,30 @@ static const struct qemu_argument arg_table[] = { {"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"}, + "pagesize", "deprecated change to host page size"}, + {"one-insn-per-tb", + "QEMU_ONE_INSN_PER_TB", false, handle_arg_one_insn_per_tb, + "", "run with one guest instruction per emulated TB"}, {"strace", "QEMU_STRACE", false, handle_arg_strace, "", "log system calls"}, - {"seed", "QEMU_RAND_SEED", true, handle_arg_randseed, + {"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 + {"perfmap", "QEMU_PERFMAP", false, handle_arg_perfmap, + "", "Generate a /tmp/perf-${pid}.map file for perf"}, + {"jitdump", "QEMU_JITDUMP", false, handle_arg_jitdump, + "", "Generate a jit-${pid}.dump file for perf"}, {NULL, NULL, false, NULL, NULL, NULL} }; @@ -578,7 +666,6 @@ static int parse_args(int argc, char **argv) exit(EXIT_FAILURE); } - filename = argv[optind]; exec_path = argv[optind]; return optind; @@ -599,15 +686,27 @@ int main(int argc, char **argv, char **envp) int i; int ret; int execfd; + int host_page_size; + 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 */ + /* + * add current environment into the list + * envlist_setenv adds to the front of the list; to preserve environ + * order add from back to front + */ for (wrk = environ; *wrk != NULL; wrk++) { + continue; + } + while (wrk != environ) { + wrk--; (void) envlist_setenv(envlist, *wrk); } @@ -617,23 +716,28 @@ int main(int argc, char **argv, char **envp) struct rlimit lim; if (getrlimit(RLIMIT_STACK, &lim) == 0 && lim.rlim_cur != RLIM_INFINITY - && lim.rlim_cur == (target_long)lim.rlim_cur) { + && lim.rlim_cur == (target_long)lim.rlim_cur + && lim.rlim_cur > guest_stack_size) { guest_stack_size = lim.rlim_cur; } } cpu_model = NULL; - srand(time(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(trace_file); + trace_init_file(); + qemu_plugin_load_list(&plugins, &error_fatal); /* Zero out regs */ memset(regs, 0, sizeof(struct target_pt_regs)); @@ -648,74 +752,149 @@ int main(int argc, char **argv, char **envp) init_qemu_uname_release(); + /* + * Manage binfmt-misc open-binary flag + */ execfd = qemu_getauxval(AT_EXECFD); if (execfd == 0) { - execfd = open(filename, O_RDONLY); + execfd = open(exec_path, O_RDONLY); if (execfd < 0) { - printf("Error while loading %s: %s\n", filename, strerror(errno)); + printf("Error while loading %s: %s\n", exec_path, strerror(errno)); _exit(EXIT_FAILURE); } } + /* Resolve executable file name to full path name */ + if (realpath(exec_path, real_exec_path)) { + exec_path = real_exec_path; + } + + /* + * 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_model(cpu_model); + cpu_type = parse_cpu_option(cpu_model); - /* init tcg before creating CPUs and to get qemu_host_page_size */ - tcg_exec_init(0); + /* init tcg before creating CPUs */ + { + AccelState *accel = current_accel(); + AccelClass *ac = ACCEL_GET_CLASS(accel); - /* 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 && - reserved_va == 0) { - /* 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; + accel_init_interfaces(ac); + object_property_set_bool(OBJECT(accel), "one-insn-per-tb", + opt_one_insn_per_tb, &error_abort); + ac->init_machine(NULL); } + /* + * Finalize page size before creating CPUs. + * This will do nothing if !TARGET_PAGE_BITS_VARY. + * The most efficient setting is to match the host. + */ + host_page_size = qemu_real_host_page_size(); + set_preferred_target_page_bits(ctz32(host_page_size)); + finalize_target_page_bits(); + cpu = cpu_create(cpu_type); - env = cpu->env_ptr; + env = cpu_env(cpu); cpu_reset(cpu); - thread_cpu = cpu; - if (getenv("QEMU_STRACE")) { - do_strace = 1; - } - - if (getenv("QEMU_RAND_SEED")) { - handle_arg_randseed(getenv("QEMU_RAND_SEED")); + /* + * 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 ((reserved_va + 1) % host_page_size) { + char *s = size_to_str(host_page_size); + fprintf(stderr, "Reserved virtual address not aligned mod %s\n", s); + g_free(s); + exit(EXIT_FAILURE); + } + 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) { + /* MAX_RESERVED_VA + 1 is a large power of 2, so is aligned. */ + reserved_va = max_reserved_va; } - target_environ = envlist_to_environ(envlist, NULL); - envlist_free(envlist); + /* + * Temporarily disable + * "comparison is always false due to limited range of data type" + * due to comparison between (possible) uint64_t and uintptr_t. + */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wtype-limits" /* - * Now that page sizes are configured in tcg_exec_init() we can do - * proper page alignment for guest_base. + * Select an initial value for task_unmapped_base that is in range. */ - guest_base = HOST_PAGE_ALIGN(guest_base); - - if (reserved_va || have_guest_base) { - guest_base = init_guest_space(guest_base, reserved_va, 0, - have_guest_base); - if (guest_base == (unsigned long)-1) { - fprintf(stderr, "Unable to reserve 0x%lx bytes of virtual address " - "space for use as guest address space (check your virtual " - "memory ulimit setting or reserve less using -R option)\n", - reserved_va); - exit(EXIT_FAILURE); + if (reserved_va) { + if (TASK_UNMAPPED_BASE < reserved_va) { + task_unmapped_base = TASK_UNMAPPED_BASE; + } else { + /* The most common default formula is TASK_SIZE / 3. */ + task_unmapped_base = TARGET_PAGE_ALIGN(reserved_va / 3); + } + } else if (TASK_UNMAPPED_BASE < UINTPTR_MAX) { + task_unmapped_base = TASK_UNMAPPED_BASE; + } else { + /* 32-bit host: pick something medium size. */ + task_unmapped_base = 0x10000000; + } + mmap_next_start = task_unmapped_base; + + /* Similarly for elf_et_dyn_base. */ + if (reserved_va) { + if (ELF_ET_DYN_BASE < reserved_va) { + elf_et_dyn_base = ELF_ET_DYN_BASE; + } else { + /* The most common default formula is TASK_SIZE / 3 * 2. */ + elf_et_dyn_base = TARGET_PAGE_ALIGN(reserved_va / 3) * 2; } + } else if (ELF_ET_DYN_BASE < UINTPTR_MAX) { + elf_et_dyn_base = ELF_ET_DYN_BASE; + } else { + /* 32-bit host: pick something medium size. */ + elf_et_dyn_base = 0x18000000; + } + +#pragma GCC diagnostic pop - 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); } } + 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 @@ -726,23 +905,31 @@ int main(int argc, char **argv, char **envp) if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { unsigned long tmp; - if (fscanf(fp, "%lu", &tmp) == 1) { - mmap_min_addr = tmp; - qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); + if (fscanf(fp, "%lu", &tmp) == 1 && tmp != 0) { + mmap_min_addr = MAX(tmp, host_page_size); + 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 = 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); - } + target_argv = g_new0(char *, target_argc + 1); /* * If argv0 is specified (using '-0' switch) we replace @@ -765,10 +952,12 @@ int main(int argc, char **argv, char **envp) cpu->opaque = ts; task_settid(ts); - ret = loader_exec(execfd, filename, target_argv, target_environ, regs, + 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", filename, strerror(-ret)); + printf("Error while loading %s: %s\n", exec_path, strerror(-ret)); _exit(EXIT_FAILURE); } @@ -779,21 +968,34 @@ int main(int argc, char **argv, char **envp) g_free(target_environ); if (qemu_loglevel_mask(CPU_LOG_PAGE)) { - qemu_log("guest_base 0x%lx\n", guest_base); - log_page_dump(); - - 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); + 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, "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); @@ -803,19 +1005,23 @@ int main(int argc, char **argv, char **envp) /* 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); - tcg_region_init(); + tcg_prologue_init(); target_cpu_copy_regs(env, regs); - if (gdbstub_port) { - if (gdbserver_start(gdbstub_port) < 0) { - fprintf(stderr, "qemu: could not open gdbserver on port %d\n", - gdbstub_port); + 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); + gdb_handlesig(cpu, 0, NULL, NULL, 0); } + +#ifdef CONFIG_SEMIHOSTING + qemu_semihosting_guestfd_init(); +#endif + cpu_loop(env); /* never exits */ return 0; |