def oncore_cb(tid, cpu, dummy) :
"""This callback happens before IRET mutates state. Put the CPU structure
into the map so that we know to ask it directly, below."""
if u.copyout_int(cpu, cpu.esp+4) & 0x3 != 0x0 :
u.log('410-tidinfo', 'ONCORE %r %d' % (cpu, tid));
go_oncore(tid,cpu)
SIM_hap_delete_callback_obj('Core_Exception_Return', cpu, oncore_cb, tid)
def reg_process(dummy, cpu, param):
fname = ""
try :
fname = copyout_str(cpu, cpu.edx)
except :
cs410_utils.log('410-warning', '410mods-userdebug.py: Unable to read string at %x; not registering process' % cpu.edx)
return
if fname == "" or '/' in fname:
return
cr3 = cpu.ecx
sname = "prog-"+fname
user_process_registry[cr3] = sname
# see if symbol table for fname exists.
# if not make it and load the symbols.
try:
SIM_get_object(sname)
### FIXME We would like to empty the symbol table if
### it exists, but we'll do the best we can by reloading
### symbols below.
except SimExc_General:
cs410_utils.alone(make_new_symtable, sname, fname, cr3)
cs410_utils.alone(switch_current_symtable, cpu)
def reg_process(dummy, cpu, param):
global user_process_registry
fname = ""
try :
fname = copyout_str(cpu, cpu.edx)
except :
cs410_utils.log('410-warning', '410mods-userdebug.py: Unable to read string at %x; not registering process' % cpu.edx)
return
if fname == "" or '/' in fname:
return
cr3 = cpu.ecx
sname = fname+"_prog"
user_process_registry[cr3] = sname
# see if symbol table for fname exists.
# if not make it and load the symbols.
try:
SIM_get_object(sname)
### FIXME We would like to empty the symbol table if
### it exists, but we'll do the best we can by reloading
### symbols below.
except SimExc_General:
cs410_utils.alone(make_new_symtable, sname, fname, cr3)
cs410_utils.alone(switch_current_symtable, cpu)
def oncore_cb(tid, cpu, dummy):
"""This callback happens before IRET mutates state. Put the CPU structure
into the map so that we know to ask it directly, below."""
if u.copyout_int(cpu, cpu.esp + 4) & 0x3 != 0x0:
u.log('410-tidinfo', 'ONCORE %r %d' % (cpu, tid))
go_oncore(tid, cpu)
SIM_hap_delete_callback_obj('Core_Exception_Return', cpu, oncore_cb,
tid)
def offcore_cb(tid, cpu, dummy):
"""This callback fires before we take the fault. Read out the
CPU state and store it in our map"""
u.log('410-tidinfo', 'OFFCORE %r %d' % (cpu, tid))
tidcontext[tid] = u.trap_frame_from_cpu(cpu)
SIM_hap_delete_callback_obj('Core_Exception', cpu, offcore_cb, tid)
SIM_hap_add_callback_obj('Core_Exception_Return', cpu, 0, oncore_cb, tid)
def offcore_cb(tid, cpu, dummy) :
"""This callback fires before we take the fault. Read out the
CPU state and store it in our map"""
u.log('410-tidinfo', 'OFFCORE %r %d' % (cpu, tid));
tidcontext[tid] = u.trap_frame_from_cpu(cpu)
SIM_hap_delete_callback_obj('Core_Exception', cpu, offcore_cb, tid)
SIM_hap_add_callback_obj('Core_Exception_Return', cpu, 0, oncore_cb, tid)
def make_new_symtable(sname, fname, cr3):
fpath = user_prog_path+fname
if not os.path.isfile(fpath) or '/' in fname:
cs410_utils.log('410-warning',
'Unable to load user symbols for "%s"' % fname)
del user_process_registry[cr3]
return
try:
cli.quiet_run_command('new-symtable %s' % sname)
cli.quiet_run_command('%s.load-symbols "%s"' % (sname, kern_path))
cli.quiet_run_command('%s.load-symbols "%s"' % (sname, fpath))
cli.quiet_run_command('%s.source-path "%s/;%s/;%s/"' %
(sname, working_dir, user_src_path, test_src_path))
except:
cs410_utils.log('410-warning',
'Unable to load user symbols for "%s"' % fname)
del user_process_registry[cr3]
def make_new_symtable(sname, fname, cr3):
fpath = user_prog_path+fname
if not os.path.isfile(fpath) or '/' in fname:
cs410_utils.log('410-warning',
'Unable to load user symbols for "%s"' % fname)
del user_process_registry[cr3]
return
try:
cli.quiet_run_command('new-symtable %s' % sname)
cli.quiet_run_command('%s.load-symbols "%s"' % (sname, kern_path))
cli.quiet_run_command('%s.load-symbols "%s"' % (sname, fpath))
cli.quiet_run_command('%s.source-path "%s/;%s/;%s/"' %
(sname, working_dir, user_src_path, test_src_path))
except:
cs410_utils.log('410-warning',
'Unable to load user symbols for "%s"' % fname)
del user_process_registry[cr3]
def tidinfo_del(dummy, cpu, param) :
tid = cpu.ecx
u.log('410-tidinfo', 'DEL %r %d' % (cpu, tid));
if tid in tidcontext :
if tidcontext[tid] == cpu.__class__ :
u.log('410-tidinfo', \
'WARN: DEL called from CPU %r for TID %d which is ONCORE on %r' \
% (cpu,tid,tidcontext[cpu]));
del cputid[tidcontext[tid]]
SIM_hap_delete_callback('Core_Exception', offcore_cb, tid)
SIM_hap_delete_callback('Core_Exception', offcore_cb, tid)
SIM_hap_delete_callback('Core_Exception_Return', oncore_cb, tid)
SIM_hap_delete_callback('Core_Exception_Return', oncore_cb, tid)
if tid in tidcontext:
del tidcontext[tid]
if tid in tidtaskname:
del tidtaskname[tid]
def tidinfo_del(dummy, cpu, param):
tid = cpu.ecx
u.log('410-tidinfo', 'DEL %r %d' % (cpu, tid))
if tid in tidcontext:
if tidcontext[tid] == cpu.__class__:
u.log('410-tidinfo', \
'WARN: DEL called from CPU %r for TID %d which is ONCORE on %r' \
% (cpu,tid,tidcontext[cpu]))
del cputid[tidcontext[tid]]
SIM_hap_delete_callback('Core_Exception', offcore_cb, tid)
SIM_hap_delete_callback('Core_Exception', offcore_cb, tid)
SIM_hap_delete_callback('Core_Exception_Return', oncore_cb, tid)
SIM_hap_delete_callback('Core_Exception_Return', oncore_cb, tid)
if tid in tidcontext:
del tidcontext[tid]
if tid in tidtaskname:
del tidtaskname[tid]
def tidinfo_set(dummy, cpu, param) :
"""Bind a tid to the current CPU as soon as it mode switches down"""
tid = cpu.ecx
u.log('410-tidinfo', 'SET %r %d' % (cpu, tid));
if tid in tidcontext and tidcontext[tid] == cpu.__class__ :
if tidcontext[tid] == cpu :
u.log('410-tidinfo', 'WARN: Oncore called twice in a row on %r for tid %d' % (cpu,tid));
# Purge any existing callbacks to reset our state machine; we'll add
# the right one below
SIM_hap_delete_callback_obj('Core_Exception', tidcontext[tid], offcore_cb, tid)
SIM_hap_delete_callback_obj('Core_Exception_Return', tidcontext[tid], oncore_cb, tid)
# Remove whichever other tid in whatever state had previously been on this CPU
if cpu in cputid and cputid[cpu] is not None :
SIM_hap_delete_callback_obj('Core_Exception', cpu, offcore_cb, cputid[cpu])
SIM_hap_delete_callback_obj('Core_Exception_Return', cpu, oncore_cb, cputid[cpu])
cputid[cpu] = tid
if cpu.cs[2] != 0 :
u.log('410-tidinfo', 'WARN: Oncore called from ring %d' % cpu.cs[2]);
go_oncore(tid, cpu) # Go oncore immediately.
else :
# We go oncore once we engage a mode switch, since the kernel cannot
# actually tell us when we go back on core
SIM_hap_add_callback_obj('Core_Exception_Return', cpu, 0, oncore_cb, tid)
def __callback_magic(dummy, cpu, param):
global kernel_up, hap_handlers
op = cpu.ebx
# Check what triggered the magic instruction
# if cpu.cr0 & 0x1 == 1 or cpu.cs[1] == 1:
# # Protected mode is engaged
# # Or the D bit in CS is turned on, so we're in 32 bit mode
# ### We used to differentiate between modes so we would do
# ### different reads. We now always read out 32 bit values.
# pass
# else :
# # Protected mode not engaged
# ### We used to read out a 16 bit value here via cpu.bx;
# ### instead we'll now just check for the BIOS region and
# ### bail in that case.
# if cpu.cs[7] == 0x0F0000l :
# ## Suppress BIOS warning in early boot.
# ## The cycle count here is by observation and might be subject
# ## to change. We may wish to have some boot flag indicate that
# ## we have loaded?
# if cpu.cycles > 0x01400000l :
# print ("Looks like magic from a BIOS region," \
# + " bailing out (%x:%x, %x, %x)") \
# % ( cpu.cs[7], cpu.eip, str_flag, cpu.cycles)
# return
if kernel_up == 0 and op != cs410_namespace.magic_opcodes["booted"]:
# print ("Looks like magic preboot," \
# + " bailing out (%x:%x, %x, %x)") \
# % ( cpu.cs[7], cpu.eip, str_flag, cpu.cycles)
return
if hap_handlers.has_key(op):
hap_handlers[op](dummy, cpu, param)
else:
cs410_utils.log(
"410-warning",
"Invalid magic %08x %s %08x %08x %08x %04x" % (op, cpu.name, cpu.cycles, cpu.eip, cpu.cr0, cpu.cs[0]),
)
def __callback_magic(dummy, cpu, param):
global kernel_up, hap_handlers
op = cpu.ebx
# Check what triggered the magic instruction
#if cpu.cr0 & 0x1 == 1 or cpu.cs[1] == 1:
# # Protected mode is engaged
# # Or the D bit in CS is turned on, so we're in 32 bit mode
# ### We used to differentiate between modes so we would do
# ### different reads. We now always read out 32 bit values.
# pass
#else :
# # Protected mode not engaged
# ### We used to read out a 16 bit value here via cpu.bx;
# ### instead we'll now just check for the BIOS region and
# ### bail in that case.
# if cpu.cs[7] == 0x0F0000l :
# ## Suppress BIOS warning in early boot.
# ## The cycle count here is by observation and might be subject
# ## to change. We may wish to have some boot flag indicate that
# ## we have loaded?
# if cpu.cycles > 0x01400000l :
# print ("Looks like magic from a BIOS region," \
# + " bailing out (%x:%x, %x, %x)") \
# % ( cpu.cs[7], cpu.eip, str_flag, cpu.cycles)
# return
if kernel_up == 0 and op != cs410_namespace.magic_opcodes["booted"]:
#print ("Looks like magic preboot," \
# + " bailing out (%x:%x, %x, %x)") \
# % ( cpu.cs[7], cpu.eip, str_flag, cpu.cycles)
return
if hap_handlers.has_key(op):
hap_handlers[op](dummy, cpu, param)
else:
cs410_utils.log(
'410-warning', 'Invalid magic %08x %s %08x %08x %08x %04x' %
(op, cpu.name, cpu.cycles, cpu.eip, cpu.cr0, cpu.cs[0]))
def cmd_tidinfo(tid):
if not tidcontext:
print "This kernel does not appear to support the modern infrastructure for this command."
print "*** If this is a reference kernel, perhaps you need to 'make update'? If that doesn't help, contact course staff."
return
if tid not in tidcontext :
print "Kernel did not register a tid %d; are you sure that's right?" % tid
return
if tid in tidtaskname :
u.log('410', 'TID %d symbols are in %s' % (tid, tidtaskname[tid]))
else :
u.log('410', 'TID %d has unknown symbol table' % (tid))
tf = tidcontext[tid]
if isinstance(tf, dict) :
# Off core, stored decoded frame at registration time
u.log('410', 'TID %d is off-core right now' % tid)
u.print_trap_frame(tf)
else :
# On core, read from cpu right now
u.log('410', 'TID %d is on-core right now: %s' % (tid, tf.name))
u.print_trap_frame(u.trap_frame_from_cpu(tf))
def cmd_tidinfo(tid):
if not tidcontext:
print "This kernel does not appear to support the modern infrastructure for this command."
print "*** If this is a reference kernel, perhaps you need to 'make update'? If that doesn't help, contact course staff."
return
if tid not in tidcontext:
print "Kernel did not register a tid %d; are you sure that's right?" % tid
return
if tid in tidtaskname:
u.log('410', 'TID %d symbols are in %s' % (tid, tidtaskname[tid]))
else:
u.log('410', 'TID %d has unknown symbol table' % (tid))
tf = tidcontext[tid]
if isinstance(tf, dict):
# Off core, stored decoded frame at registration time
u.log('410', 'TID %d is off-core right now' % tid)
u.print_trap_frame(tf)
else:
# On core, read from cpu right now
u.log('410', 'TID %d is on-core right now: %s' % (tid, tf.name))
u.print_trap_frame(u.trap_frame_from_cpu(tf))
def tidinfo_set(dummy, cpu, param):
"""Bind a tid to the current CPU as soon as it mode switches down"""
tid = cpu.ecx
u.log('410-tidinfo', 'SET %r %d' % (cpu, tid))
if tid in tidcontext and tidcontext[tid] == cpu.__class__:
if tidcontext[tid] == cpu:
u.log(
'410-tidinfo',
'WARN: Oncore called twice in a row on %r for tid %d' %
(cpu, tid))
# Purge any existing callbacks to reset our state machine; we'll add
# the right one below
SIM_hap_delete_callback_obj('Core_Exception', tidcontext[tid],
offcore_cb, tid)
SIM_hap_delete_callback_obj('Core_Exception_Return', tidcontext[tid],
oncore_cb, tid)
# Remove whichever other tid in whatever state had previously been on this CPU
if cpu in cputid and cputid[cpu] is not None:
SIM_hap_delete_callback_obj('Core_Exception', cpu, offcore_cb,
cputid[cpu])
SIM_hap_delete_callback_obj('Core_Exception_Return', cpu, oncore_cb,
cputid[cpu])
cputid[cpu] = tid
if cpu.cs[2] != 0:
u.log('410-tidinfo', 'WARN: Oncore called from ring %d' % cpu.cs[2])
go_oncore(tid, cpu) # Go oncore immediately.
else:
# We go oncore once we engage a mode switch, since the kernel cannot
# actually tell us when we go back on core
SIM_hap_add_callback_obj('Core_Exception_Return', cpu, 0, oncore_cb,
tid)
def halt(dummy, cpu, param):
cs410_utils.log('410-core', 'Halted.')
cs410_dispatch.run_halt_callbacks()
SIM_quit(0)
def lputs(dummy, cpu, param):
if cpu.cs[0] & 3:
mc = 'udbg'
else:
mc = 'kdbg'
cs410_utils.log(mc, cs410_utils.copyout_str(cpu, cpu.ecx))
def halt(dummy, cpu, param):
cs410_utils.log('410-core', 'Halted.')
cs410_dispatch.run_halt_callbacks()
SIM_quit(0)
if isinstance(tf, dict):
# Off core, stored decoded frame at registration time
u.log('410', 'TID %d is off-core right now' % tid)
u.print_trap_frame(tf)
else:
# On core, read from cpu right now
u.log('410', 'TID %d is on-core right now: %s' % (tid, tf.name))
u.print_trap_frame(u.trap_frame_from_cpu(tf))
def cmd_tids():
u.log('410', 'TIDs registered right now: %r' % tidcontext.keys())
cs410_dispatch.add_simcall(tidinfo_set)
cs410_dispatch.add_simcall(tidinfo_del)
new_command(
"tidinfo",
cmd_tidinfo,
args=[arg(int_t, "tid")],
short="Ask kernel for thread information by TID",
doc="This reports thread information as derived from simulation state")
new_command("tids",
cmd_tids,
short="Report the list of tids registered for tidinfo debugging.",
doc="This reports the list of tids being tracked.")
# u.logging['410-tidinfo'] = True
# u.printing['410-tidinfo'] = True
u.log('410-tidinfo', 'tidinfo loaded')
def cmd_tids():
u.log('410', 'TIDs registered right now: %r' % tidcontext.keys())
def cmd_tids() :
u.log('410', 'TIDs registered right now: %r' % tidcontext.keys());
if tid in tidtaskname :
u.log('410', 'TID %d symbols are in %s' % (tid, tidtaskname[tid]))
else :
u.log('410', 'TID %d has unknown symbol table' % (tid))
tf = tidcontext[tid]
if isinstance(tf, dict) :
# Off core, stored decoded frame at registration time
u.log('410', 'TID %d is off-core right now' % tid)
u.print_trap_frame(tf)
else :
# On core, read from cpu right now
u.log('410', 'TID %d is on-core right now: %s' % (tid, tf.name))
u.print_trap_frame(u.trap_frame_from_cpu(tf))
def cmd_tids() :
u.log('410', 'TIDs registered right now: %r' % tidcontext.keys());
cs410_dispatch.add_simcall(tidinfo_set)
cs410_dispatch.add_simcall(tidinfo_del)
new_command("tidinfo", cmd_tidinfo, args=[arg(int_t, "tid")],
short="Ask kernel for thread information by TID",
doc="This reports thread information as derived from simulation state")
new_command("tids", cmd_tids,
short="Report the list of tids registered for tidinfo debugging.",
doc="This reports the list of tids being tracked.")
# u.logging['410-tidinfo'] = True
# u.printing['410-tidinfo'] = True
u.log('410-tidinfo', 'tidinfo loaded')
def lputs(dummy, cpu, param):
if cpu.cs[0] & 3:
mc = 'udbg'
else:
mc = 'kdbg'
cs410_utils.log(mc, cs410_utils.copyout_str(cpu, cpu.ecx))
