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move towards simpler relocation model

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This commit is contained in:
Torsten Ruger 2014-04-21 20:59:48 +03:00
parent 1b8f15a3fc
commit 5237ff9e40
3 changed files with 12 additions and 9 deletions
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9
lib/asm/arm/addr_table_object.rb
View File

@ -1,6 +1,15 @@
module Asm
module Arm
# TODO actually find the closest somehow (DROPPED for now)
def self.closest_addrtable(as)
as.objects.find do |obj|
obj.is_a?(Asm::Arm::AddrTableObject)
end || (raise Asm::AssemblyError.new('could not find addrtable to use', nil))
end
#this has been DROPPED for now (didn't work) and we can do without it
class AddrTableObject
def initialize
@table = []

7
lib/asm/arm/arm_assembler.rb
View File

@ -14,13 +14,6 @@ module Asm
# Unofficial (cant be used for extern relocations)
R_ARM_PC12 = 0xF0
# TODO actually find the closest somehow
def self.closest_addrtable(as)
as.objects.find do |obj|
obj.is_a?(Asm::Arm::AddrTableObject)
end || (raise Asm::AssemblyError.new('could not find addrtable to use', nil))
end
def self.write_resolved_relocation(io, addr, type)
case type
when R_ARM_PC24

5
lib/asm/arm/memory_access_builder.rb
View File

@ -76,13 +76,14 @@ module Asm
(byte_access << 12+4+4+1+1) | (add_offset << 12+4+4+1+1+1) |
(pre_post_index << 12+4+4+1+1+1+1) | (i << 12+4+4+1+1+1+1+1) |
(inst_class << 12+4+4+1+1+1+1+1+1) | (cond << 12+4+4+1+1+1+1+1+1+2)
# move towards simpler model
if (@use_addrtable_reloc)
# closest_addrtable = Asm::Arm.closest_addrtable(as)
if (@addrtable_reloc_target.is_a?(Asm::LabelRefNode))
obj = generator.object_for_label(@addrtable_reloc_target.label, inst)
ref_label = closest_addrtable.add_label(obj)
# ref_label = closest_addrtable.add_label(obj)
elsif (@addrtable_reloc_target.is_a?(Asm::NumLiteralNode))
ref_label = closest_addrtable.add_const(@addrtable_reloc_target.value)
# ref_label = closest_addrtable.add_const(@addrtable_reloc_target.value)
end
as.add_relocation io.tell, ref_label, Asm::Arm::R_ARM_PC12,
Asm::Arm::Instruction::RelocHandler