def write_real_errno(self, save_err):
"""This occurs just before emit_raw_call().
"""
mc = self.mc
if handle_lasterror and (save_err & rffi.RFFI_READSAVED_LASTERROR):
# must call SetLastError(). There are no registers to save
# if we are on 32-bit in this case: no register contains
# the arguments to the main function we want to call afterwards.
# On win64, though, it's more messy. It could be better optimized
# but for now we save (again) the registers containing arguments,
# and restore them afterwards.
from rpython.rlib.rwin32 import _SetLastError
adr = llmemory.cast_ptr_to_adr(_SetLastError)
SetLastError_addr = self.asm.cpu.cast_adr_to_int(adr)
#
if save_err & rffi.RFFI_ALT_ERRNO:
lasterror = llerrno.get_alt_lasterror_offset(self.asm.cpu)
else:
lasterror = llerrno.get_rpy_lasterror_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
if not WIN64:
self.save_stack_position() # => edi, callee-saved
mc.PUSH_m((tlofsreg.value, lasterror))
mc.CALL(imm(follow_jump(SetLastError_addr)))
# restore the stack position without assuming a particular
# calling convention of _SetLastError()
self.mc.stack_frame_size_delta(-WORD)
self.mc.MOV(esp, self.saved_stack_position_reg)
else:
self.win64_save_register_args()
mc.MOV_rm(ecx.value, (tlofsreg.value, lasterror))
mc.CALL(imm(follow_jump(SetLastError_addr)))
self.win64_restore_register_args()
if save_err & rffi.RFFI_READSAVED_ERRNO:
# Just before a call, read '*_errno' and write it into the
# real 'errno'. Most registers are free here, including the
# callee-saved ones, except 'ebx' and except the ones used to
# pass the arguments on x86-64.
if save_err & rffi.RFFI_ALT_ERRNO:
rpy_errno = llerrno.get_alt_errno_offset(self.asm.cpu)
else:
rpy_errno = llerrno.get_rpy_errno_offset(self.asm.cpu)
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
if IS_X86_32:
tmpreg = edx
else:
tmpreg = r10 # edx is used for 3rd argument
mc.MOV_rm(tmpreg.value, (tlofsreg.value, p_errno))
mc.MOV32_rm(eax.value, (tlofsreg.value, rpy_errno))
mc.MOV32_mr((tmpreg.value, 0), eax.value)
elif save_err & rffi.RFFI_ZERO_ERRNO_BEFORE:
# Same, but write zero.
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
mc.MOV_rm(eax.value, (tlofsreg.value, p_errno))
mc.MOV32_mi((eax.value, 0), 0)
def write_real_errno(self, save_err):
"""This occurs just before emit_raw_call().
"""
mc = self.mc
if handle_lasterror and (save_err & rffi.RFFI_READSAVED_LASTERROR):
# must call SetLastError(). There are no registers to save
# because we are on 32-bit in this case: no register contains
# the arguments to the main function we want to call afterwards.
from rpython.rlib.rwin32 import _SetLastError
adr = llmemory.cast_ptr_to_adr(_SetLastError)
SetLastError_addr = self.asm.cpu.cast_adr_to_int(adr)
assert isinstance(self, CallBuilder32) # Windows 32-bit only
#
if save_err & rffi.RFFI_ALT_ERRNO:
lasterror = llerrno.get_alt_lasterror_offset(self.asm.cpu)
else:
lasterror = llerrno.get_rpy_lasterror_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi, callee-saved
self.save_stack_position() # => edi, callee-saved
mc.PUSH_m((tlofsreg.value, lasterror))
mc.CALL(imm(follow_jump(SetLastError_addr)))
# restore the stack position without assuming a particular
# calling convention of _SetLastError()
self.mc.stack_frame_size_delta(-WORD)
self.mc.MOV(esp, self.saved_stack_position_reg)
if save_err & rffi.RFFI_READSAVED_ERRNO:
# Just before a call, read '*_errno' and write it into the
# real 'errno'. Most registers are free here, including the
# callee-saved ones, except 'ebx' and except the ones used to
# pass the arguments on x86-64.
if save_err & rffi.RFFI_ALT_ERRNO:
rpy_errno = llerrno.get_alt_errno_offset(self.asm.cpu)
else:
rpy_errno = llerrno.get_rpy_errno_offset(self.asm.cpu)
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
if IS_X86_32:
tmpreg = edx
else:
tmpreg = r11 # edx is used for 3rd argument
mc.MOV_rm(tmpreg.value, (tlofsreg.value, p_errno))
mc.MOV32_rm(eax.value, (tlofsreg.value, rpy_errno))
mc.MOV32_mr((tmpreg.value, 0), eax.value)
elif save_err & rffi.RFFI_ZERO_ERRNO_BEFORE:
# Same, but write zero.
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
mc.MOV_rm(eax.value, (tlofsreg.value, p_errno))
mc.MOV32_mi((eax.value, 0), 0)
def write_real_errno(self, save_err):
"""This occurs just before emit_raw_call().
"""
mc = self.mc
if handle_lasterror and (save_err & rffi.RFFI_READSAVED_LASTERROR):
# must call SetLastError(). There are no registers to save
# because we are on 32-bit in this case: no register contains
# the arguments to the main function we want to call afterwards.
from rpython.rlib.rwin32 import _SetLastError
adr = llmemory.cast_ptr_to_adr(_SetLastError)
SetLastError_addr = self.asm.cpu.cast_adr_to_int(adr)
assert isinstance(self, CallBuilder32) # Windows 32-bit only
#
if save_err & rffi.RFFI_ALT_ERRNO:
lasterror = llerrno.get_alt_lasterror_offset(self.asm.cpu)
else:
lasterror = llerrno.get_rpy_lasterror_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi, callee-saved
self.save_stack_position() # => edi, callee-saved
mc.PUSH_m((tlofsreg.value, lasterror))
mc.CALL(imm(follow_jump(SetLastError_addr)))
# restore the stack position without assuming a particular
# calling convention of _SetLastError()
self.mc.MOV(esp, self.saved_stack_position_reg)
if save_err & rffi.RFFI_READSAVED_ERRNO:
# Just before a call, read '*_errno' and write it into the
# real 'errno'. Most registers are free here, including the
# callee-saved ones, except 'ebx' and except the ones used to
# pass the arguments on x86-64.
if save_err & rffi.RFFI_ALT_ERRNO:
rpy_errno = llerrno.get_alt_errno_offset(self.asm.cpu)
else:
rpy_errno = llerrno.get_rpy_errno_offset(self.asm.cpu)
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
if IS_X86_32:
tmpreg = edx
else:
tmpreg = r11 # edx is used for 3rd argument
mc.MOV_rm(tmpreg.value, (tlofsreg.value, p_errno))
mc.MOV32_rm(eax.value, (tlofsreg.value, rpy_errno))
mc.MOV32_mr((tmpreg.value, 0), eax.value)
elif save_err & rffi.RFFI_ZERO_ERRNO_BEFORE:
# Same, but write zero.
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12, callee-saved
mc.MOV_rm(eax.value, (tlofsreg.value, p_errno))
mc.MOV32_mi((eax.value, 0), 0)
def read_real_errno(self, save_err):
"""This occurs after emit_raw_call() and after restore_stack_pointer().
"""
mc = self.mc
if save_err & rffi.RFFI_SAVE_ERRNO:
# Just after a call, read the real 'errno' and save a copy of
# it inside our thread-local '*_errno'. Most registers are
# free here, including the callee-saved ones, except 'ebx'.
# The tlofs register might have been loaded earlier and is
# callee-saved, so it does not need to be reloaded.
if save_err & rffi.RFFI_ALT_ERRNO:
rpy_errno = llerrno.get_alt_errno_offset(self.asm.cpu)
else:
rpy_errno = llerrno.get_rpy_errno_offset(self.asm.cpu)
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12 (possibly reused)
mc.MOV_rm(edi.value, (tlofsreg.value, p_errno))
mc.MOV32_rm(edi.value, (edi.value, 0))
mc.MOV32_mr((tlofsreg.value, rpy_errno), edi.value)
if handle_lasterror and (
save_err &
(rffi.RFFI_SAVE_LASTERROR | rffi.RFFI_SAVE_WSALASTERROR)):
if save_err & rffi.RFFI_SAVE_LASTERROR:
from rpython.rlib.rwin32 import _GetLastError
adr = llmemory.cast_ptr_to_adr(_GetLastError)
else:
from rpython.rlib._rsocket_rffi import _WSAGetLastError
adr = llmemory.cast_ptr_to_adr(_WSAGetLastError)
GetLastError_addr = self.asm.cpu.cast_adr_to_int(adr)
assert isinstance(self, CallBuilder32) # Windows 32-bit only
#
if save_err & rffi.RFFI_ALT_ERRNO:
lasterror = llerrno.get_alt_lasterror_offset(self.asm.cpu)
else:
lasterror = llerrno.get_rpy_lasterror_offset(self.asm.cpu)
self.save_result_value(save_edx=True) # save eax/edx/xmm0
self.result_value_saved_early = True
mc.CALL(imm(follow_jump(GetLastError_addr)))
#
tlofsreg = self.get_tlofs_reg() # => esi (possibly reused)
mc.MOV32_mr((tlofsreg.value, lasterror), eax.value)
def read_real_errno(self, save_err):
"""This occurs after emit_raw_call() and after restore_stack_pointer().
"""
mc = self.mc
if save_err & rffi.RFFI_SAVE_ERRNO:
# Just after a call, read the real 'errno' and save a copy of
# it inside our thread-local '*_errno'. Most registers are
# free here, including the callee-saved ones, except 'ebx'.
# The tlofs register might have been loaded earlier and is
# callee-saved, so it does not need to be reloaded.
if save_err & rffi.RFFI_ALT_ERRNO:
rpy_errno = llerrno.get_alt_errno_offset(self.asm.cpu)
else:
rpy_errno = llerrno.get_rpy_errno_offset(self.asm.cpu)
p_errno = llerrno.get_p_errno_offset(self.asm.cpu)
tlofsreg = self.get_tlofs_reg() # => esi or r12 (possibly reused)
mc.MOV_rm(ecx.value, (tlofsreg.value, p_errno))
mc.MOV32_rm(ecx.value, (ecx.value, 0))
mc.MOV32_mr((tlofsreg.value, rpy_errno), ecx.value)
if handle_lasterror and (save_err & (rffi.RFFI_SAVE_LASTERROR |
rffi.RFFI_SAVE_WSALASTERROR)):
if save_err & rffi.RFFI_SAVE_LASTERROR:
from rpython.rlib.rwin32 import _GetLastError
adr = llmemory.cast_ptr_to_adr(_GetLastError)
else:
from rpython.rlib._rsocket_rffi import _WSAGetLastError
adr = llmemory.cast_ptr_to_adr(_WSAGetLastError)
GetLastError_addr = self.asm.cpu.cast_adr_to_int(adr)
assert isinstance(self, CallBuilder32) # Windows 32-bit only
#
if save_err & rffi.RFFI_ALT_ERRNO:
lasterror = llerrno.get_alt_lasterror_offset(self.asm.cpu)
else:
lasterror = llerrno.get_rpy_lasterror_offset(self.asm.cpu)
self.save_result_value(save_edx=True) # save eax/edx/xmm0
self.result_value_saved_early = True
mc.CALL(imm(follow_jump(GetLastError_addr)))
#
tlofsreg = self.get_tlofs_reg() # => esi (possibly reused)
mc.MOV32_mr((tlofsreg.value, lasterror), eax.value)
