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remoe sys call message

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and rely on linux to restore all registers
save message in r8
This commit is contained in:
Torsten Ruger 2015-07-02 13:48:32 +03:00
parent 9a6c5d9ea8
commit 69781fb505
3 changed files with 8 additions and 16 deletions
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1
lib/parfait/space.rb
View File

@ -25,7 +25,6 @@ module Parfait
super()
Parfait::Space.set_object_space self
@classes = Parfait::Dictionary.new_object
@syscall_message = nil # a hack sto store the message during syscall
end
attr_reader :classes , :first_message

21
lib/register/builtin/kernel.rb
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@ -43,28 +43,21 @@ module Register
function.info.add_code Syscall.new( name )
restore_message(function)
end
# save the current message, as the syscall destroys all context
#
# currently HACKED into the space as a temporary varaible. As the space is a globally
# unique object we can retrieve it from there
# TODO : fix this to use global (later per thread) variable
# This relies on linux to save and restore all registers
#
def save_message(function)
space_tmp = Register.tmp_reg
ind = Register.resolve_index( :space , :syscall_message )
function.info.add_code LoadConstant.new( Parfait::Space.object_space , space_tmp)
function.info.add_code SetSlot.new( Register.message_reg , space_tmp , ind)
function.info.add_code RegisterTransfer.new( Register.message_reg , :r8 )
end
def restore_message(function)
# get the sys return out of the way
return_tmp = Register.tmp_reg
# get the sys return out of the way
function.info.add_code RegisterTransfer.new( Register.message_reg , return_tmp )
# load the space into the base register
function.info.add_code LoadConstant.new(Parfait::Space.object_space ,Register.message_reg)
# find the stored message
ind = Register.resolve_index( :space , :syscall_message )
# and load it into the base RegisterMachine
function.info.add_code Register.get_slot :message , ind , :message
# load the stored message into the base RegisterMachine
function.info.add_code RegisterTransfer.new( :r8 , Register.message_reg )
# save the return value into the message
function.info.add_code Register.set_slot( return_tmp , :message , :return_value )
# and "unroll" self and frame

2
lib/virtual/boot.rb
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@ -30,7 +30,7 @@ module Virtual
:caller , :name ],
:MetaClass => [],
:BinaryCode => [],
:Space => [:classes , :first_message , :syscall_message],
:Space => [:classes , :first_message ],
:Frame => [:next_frame ],
:Layout => [:object_class] ,
:Class => [:object_layout ],