* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
-#include <sys/types.h>
-#include <sys/time.h>
+#include "qemu/osdep.h"
#include <sys/resource.h>
#include <sys/sysctl.h>
-#include "qemu/osdep.h"
#include "qemu/help-texts.h"
#include "qemu/units.h"
#include "qemu/accel.h"
#include "trace/control.h"
#include "crypto/init.h"
#include "qemu/guest-random.h"
+#include "gdbstub/user.h"
#include "host-os.h"
#include "target_arch_cpu.h"
-int singlestep;
+static bool opt_one_insn_per_tb;
uintptr_t guest_base;
bool 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 0xfffffffful
# else
-# define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS)
+# define MAX_RESERVED_VA ((1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
# endif
# else
# define MAX_RESERVED_VA 0
"-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"
+ "-one-insn-per-tb run with one guest instruction per emulated TB\n"
+ "-singlestep deprecated synonym for -one-insn-per-tb\n"
"-strace log system calls\n"
"-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
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);
}
(void) envlist_unsetenv(envlist, "LD_PRELOAD");
} else if (!strcmp(r, "seed")) {
seed_optarg = optarg;
- } else if (!strcmp(r, "singlestep")) {
- singlestep = 1;
+ } else if (!strcmp(r, "singlestep") || !strcmp(r, "one-insn-per-tb")) {
+ opt_one_insn_per_tb = true;
} else if (!strcmp(r, "strace")) {
do_strace = 1;
} else if (!strcmp(r, "trace")) {
/* init tcg before creating CPUs and to get qemu_host_page_size */
{
- AccelClass *ac = ACCEL_GET_CLASS(current_accel());
+ AccelState *accel = current_accel();
+ AccelClass *ac = ACCEL_GET_CLASS(accel);
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);
}
cpu = cpu_create(cpu_type);
- env = cpu->env_ptr;
+ env = cpu_env(cpu);
cpu_reset(cpu);
thread_cpu = cpu;
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) {
* Now that page sizes are configured we can do
* proper page alignment for guest_base.
*/
- guest_base = HOST_PAGE_ALIGN(guest_base);
+ if (have_guest_base) {
+ if (guest_base & ~qemu_host_page_mask) {
+ error_report("Selected guest base not host page aligned");
+ exit(1);
+ }
+ }
+
+ /*
+ * If reserving host virtual address space, do so now.
+ * Combined with '-B', ensure that the chosen range is free.
+ */
+ if (reserved_va) {
+ void *p;
+
+ if (have_guest_base) {
+ p = mmap((void *)guest_base, reserved_va + 1, PROT_NONE,
+ MAP_ANON | MAP_PRIVATE | MAP_FIXED | MAP_EXCL, -1, 0);
+ } else {
+ p = mmap(NULL, reserved_va + 1, PROT_NONE,
+ MAP_ANON | MAP_PRIVATE, -1, 0);
+ }
+ if (p == MAP_FAILED) {
+ const char *err = strerror(errno);
+ char *sz = size_to_str(reserved_va + 1);
+
+ if (have_guest_base) {
+ error_report("Cannot allocate %s bytes at -B %p for guest "
+ "address space: %s", sz, (void *)guest_base, err);
+ } else {
+ error_report("Cannot allocate %s bytes for guest "
+ "address space: %s", sz, err);
+ }
+ exit(1);
+ }
+ guest_base = (uintptr_t)p;
+ have_guest_base = true;
+
+ /* Ensure that mmap_next_start is within range. */
+ if (reserved_va <= mmap_next_start) {
+ mmap_next_start = (reserved_va / 4 * 3)
+ & TARGET_PAGE_MASK & qemu_host_page_mask;
+ }
+ }
if (loader_exec(filename, argv + optind, target_environ, regs, info,
&bprm) != 0) {
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",
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