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utils.py: add silent and call arguments to msr/mrs

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call allows the caller to override the function used for the function
call, e.g. to use EL0.

Use silent=True for find_all_regs.py

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-02-25 00:29:23 +09:00
parent 3872b1a7da
commit d918b066b6
2 changed files with 16 additions and 10 deletions
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4
proxyclient/find_all_regs.py
View file

@ -46,9 +46,9 @@ for op1 in range(1 << 3):
print("s3_%d_c%d_c%d_%d (3, %d, %d, %d, %d) = 0x%x" % (
op1, CRn, CRm, op2, op1, CRn, CRm, op2, v))
try:
u.msr((3, op1, CRn, CRm, op2), v)
u.msr((3, op1, CRn, CRm, op2), v, silent=True)
except:
pass
print(" - READONLY")
else:
print(" - writable")
i += 1

22
proxyclient/utils.py
View file

@ -41,7 +41,9 @@ class ProxyUtils(object):
self.code_buffer = self.malloc(0x10000)
def mrs(self, reg):
def mrs(self, reg, silent=False, call=None):
if call is None:
call = self.proxy.call
op0, op1, CRn, CRm, op2 = reg
op = (((op0 & 1) << 19) | (op1 << 16) | (CRn << 12) |
@ -53,15 +55,17 @@ class ProxyUtils(object):
self.proxy.dc_cvau(self.code_buffer, 8)
self.proxy.ic_ivau(self.code_buffer, 8)
self.proxy.set_exc_guard(self.proxy.GUARD_MARK)
retval = self.proxy.call(self.code_buffer)
self.proxy.set_exc_guard(self.proxy.GUARD_MARK | (self.proxy.GUARD_SILENT if silent else 0))
retval = call(self.code_buffer)
cnt = self.proxy.get_exc_count()
self.proxy.set_exc_guard(self.proxy.GUARD_OFF)
if cnt:
raise ProxyError("Exception occurred")
return retval
def msr(self, reg, val):
def msr(self, reg, val, silent=False, el0=False, call=None):
if call is None:
call = self.proxy.call
op0, op1, CRn, CRm, op2 = reg
op = (((op0 & 1) << 19) | (op1 << 16) | (CRn << 12) |
@ -73,14 +77,16 @@ class ProxyUtils(object):
self.proxy.dc_cvau(self.code_buffer, 8)
self.proxy.ic_ivau(self.code_buffer, 8)
self.proxy.set_exc_guard(self.proxy.GUARD_SKIP)
self.proxy.call(self.code_buffer, val)
self.proxy.set_exc_guard(self.proxy.GUARD_SKIP | (self.proxy.GUARD_SILENT if silent else 0))
call(self.code_buffer, val)
cnt = self.proxy.get_exc_count()
self.proxy.set_exc_guard(self.proxy.GUARD_OFF)
if cnt:
raise ProxyError("Exception occurred")
def inst(self, op, r0=0, r1=0, r2=0, r3=0, silent=False):
def inst(self, op, r0=0, r1=0, r2=0, r3=0, silent=False, el0=False):
if call is None:
call = self.proxy.call
func = struct.pack("<II", op, 0xd65f03c0)
self.iface.writemem(self.code_buffer, func)
@ -88,7 +94,7 @@ class ProxyUtils(object):
self.proxy.ic_ivau(self.code_buffer, 8)
self.proxy.set_exc_guard(self.proxy.GUARD_SKIP | (self.proxy.GUARD_SILENT if silent else 0))
ret = self.proxy.call(self.code_buffer, r0, r1, r2, r3)
ret = call(self.code_buffer, r0, r1, r2, r3)
cnt = self.proxy.get_exc_count()
self.proxy.set_exc_guard(self.proxy.GUARD_OFF)
if cnt: