static void
gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args,
char **env, int from_tty)
{
int len;
char *arg_buf, **argv;
if (exec_file == 0 || exec_bfd == 0)
warning (_("No executable file specified."));
if (!program_loaded)
warning (_("No program loaded."));
if (remote_debug)
printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
(exec_file ? exec_file : "(NULL)"),
args);
if (ptid_equal (inferior_ptid, remote_sim_ptid))
gdbsim_kill (target);
remove_breakpoints ();
init_wait_for_inferior ();
if (exec_file != NULL)
{
len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10;
arg_buf = (char *) alloca (len);
arg_buf[0] = '\0';
strcat (arg_buf, exec_file);
strcat (arg_buf, " ");
strcat (arg_buf, args);
argv = gdb_buildargv (arg_buf);
make_cleanup_freeargv (argv);
}
else
argv = NULL;
sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
inferior_ptid = remote_sim_ptid;
add_inferior_silent (ptid_get_pid (inferior_ptid));
add_thread_silent (inferior_ptid);
target_mark_running (&gdbsim_ops);
insert_breakpoints (); /* Needed to get correct instruction in cache */
clear_proceed_status ();
}
static void
gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty)
{
int len;
char *arg_buf, **argv;
if (exec_file == 0 || exec_bfd == 0)
warning ("No executable file specified.");
if (!program_loaded)
warning ("No program loaded.");
if (sr_get_debug ())
printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
(exec_file ? exec_file : "(NULL)"),
args);
gdbsim_kill ();
remove_breakpoints ();
init_wait_for_inferior ();
if (exec_file != NULL)
{
len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10;
arg_buf = (char *) alloca (len);
arg_buf[0] = '\0';
strcat (arg_buf, exec_file);
strcat (arg_buf, " ");
strcat (arg_buf, args);
argv = buildargv (arg_buf);
make_cleanup_freeargv (argv);
}
else
argv = NULL;
sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
inferior_ptid = pid_to_ptid (42);
insert_breakpoints (); /* Needed to get correct instruction in cache */
clear_proceed_status ();
/* NB: Entry point already set by sim_create_inferior. */
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
}
static int
arm_linux_copy_svc (struct gdbarch *gdbarch, struct regcache *regs,
struct displaced_step_closure *dsc)
{
CORE_ADDR return_to = 0;
struct frame_info *frame;
unsigned int svc_number = displaced_read_reg (regs, dsc, 7);
int is_sigreturn = 0;
int is_thumb;
frame = get_current_frame ();
is_sigreturn = arm_linux_sigreturn_return_addr(frame, svc_number,
&return_to, &is_thumb);
if (is_sigreturn)
{
struct symtab_and_line sal;
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: found "
"sigreturn/rt_sigreturn SVC call. PC in frame = %lx\n",
(unsigned long) get_frame_pc (frame));
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. "
"Setting momentary breakpoint.\n", (unsigned long) return_to);
gdb_assert (inferior_thread ()->control.step_resume_breakpoint
== NULL);
sal = find_pc_line (return_to, 0);
sal.pc = return_to;
sal.section = find_pc_overlay (return_to);
sal.explicit_pc = 1;
frame = get_prev_frame (frame);
if (frame)
{
inferior_thread ()->control.step_resume_breakpoint
= set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame),
bp_step_resume);
/* set_momentary_breakpoint invalidates FRAME. */
frame = NULL;
/* We need to make sure we actually insert the momentary
breakpoint set above. */
insert_breakpoints ();
}
else if (debug_displaced)
fprintf_unfiltered (gdb_stderr, "displaced: couldn't find previous "
"frame to set momentary breakpoint for "
"sigreturn/rt_sigreturn\n");
}
else if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: sigreturn/rt_sigreturn "
"SVC call not in signal trampoline frame\n");
/* Preparation: If we detect sigreturn, set momentary breakpoint at resume
location, else nothing.
Insn: unmodified svc.
Cleanup: if pc lands in scratch space, pc <- insn_addr + 4
else leave pc alone. */
dsc->cleanup = &arm_linux_cleanup_svc;
/* Pretend we wrote to the PC, so cleanup doesn't set PC to the next
instruction. */
dsc->wrote_to_pc = 1;
return 0;
}
static int
arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
struct regcache *regs, struct displaced_step_closure *dsc)
{
CORE_ADDR from = dsc->insn_addr;
struct frame_info *frame;
unsigned int svc_number = displaced_read_reg (regs, from, 7);
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: copying Linux svc insn %.8lx\n",
(unsigned long) insn);
frame = get_current_frame ();
/* Is this a sigreturn or rt_sigreturn syscall? Note: these are only useful
for EABI. */
if (svc_number == 119 || svc_number == 173)
{
if (get_frame_type (frame) == SIGTRAMP_FRAME)
{
CORE_ADDR return_to;
struct symtab_and_line sal;
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: found "
"sigreturn/rt_sigreturn SVC call. PC in frame = %lx\n",
(unsigned long) get_frame_pc (frame));
return_to = frame_unwind_caller_pc (frame);
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. "
"Setting momentary breakpoint.\n", (unsigned long) return_to);
gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
sal = find_pc_line (return_to, 0);
sal.pc = return_to;
sal.section = find_pc_overlay (return_to);
sal.explicit_pc = 1;
frame = get_prev_frame (frame);
if (frame)
{
inferior_thread ()->step_resume_breakpoint
= set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame),
bp_step_resume);
/* We need to make sure we actually insert the momentary
breakpoint set above. */
insert_breakpoints ();
}
else if (debug_displaced)
fprintf_unfiltered (gdb_stderr, "displaced: couldn't find previous "
"frame to set momentary breakpoint for "
"sigreturn/rt_sigreturn\n");
}
else if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: sigreturn/rt_sigreturn "
"SVC call not in signal trampoline frame\n");
}
/* Preparation: If we detect sigreturn, set momentary breakpoint at resume
location, else nothing.
Insn: unmodified svc.
Cleanup: if pc lands in scratch space, pc <- insn_addr + 4
else leave pc alone. */
dsc->modinsn[0] = insn;
dsc->cleanup = &arm_linux_cleanup_svc;
/* Pretend we wrote to the PC, so cleanup doesn't set PC to the next
instruction. */
dsc->wrote_to_pc = 1;
return 0;
}
