Module: Rex::Arch::Sparc

Defined in:
lib/rex/arch/sparc.rb

Overview

Everything here is mostly stolen from vlad’s perl sparc stuff

Constant Summary collapse

RegisterNumber =

Register number constants

{
  'g0' =>  0, 'g1' =>  1, 'g2' =>  2, 'g3' =>  3,
  'g4' =>  4, 'g5' =>  5, 'g6' =>  6, 'g7' =>  7,
  'o0' =>  8, 'o1' =>  9, 'o2' => 10, 'o3' => 11,
  'o4' => 12, 'o5' => 13, 'o6' => 14, 'o7' => 15,
  'l0' => 16, 'l1' => 17, 'l2' => 18, 'l3' => 19,
  'l4' => 20, 'l5' => 21, 'l6' => 22, 'l7' => 23,
  'i0' => 24, 'i1' => 25, 'i2' => 26, 'i3' => 27,
  'i4' => 28, 'i5' => 29, 'i6' => 30, 'i7' => 31,
  'sp' => 14, 'fp' => 30,
}

Class Method Summary collapse

Class Method Details

.ori(src, constant, dst) ⇒ Object

Encodes an OR instruction with the value ‘constant’ being OR’ed with the ‘src’ register into the ‘dst’ register



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# File 'lib/rex/arch/sparc.rb', line 41

def self.ori(src, constant, dst)
  [
    (2 << 30) |
    (RegisterNumber[dst] << 25) |
    (2 << 19) |
    (RegisterNumber[src] << 14) |
    (1 << 13) |
    (constant & 0x1fff)
  ].pack('N')
end

.set(constant, dst) ⇒ Object

Puts ‘constant’ into the ‘dst’ register using as few instructions as possible by checking the size of the value. XXX: signedness support



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# File 'lib/rex/arch/sparc.rb', line 56

def self.set(constant, dst)
  if (constant <= 4095 and constant >= 0)
    ori('g0', constant, dst)
  elsif (constant & 0x3ff != 0)
    set_dword(constant, dst)
  else
    sethi(constant, dst)
  end
end

.set_dword(constant, dst) ⇒ Object

Puts ‘constant’ into the ‘dst’ register using both sethi and ori (necessary to use both uncessarily in some cases with encoders)



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# File 'lib/rex/arch/sparc.rb', line 69

def self.set_dword(constant, dst)
  sethi(constant, dst) + ori(dst, constant & 0x3ff, dst)
end

.sethi(constant, dst) ⇒ Object

Encodes a SETHI instruction with the value ‘constant’ being put into ‘dst’ register



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# File 'lib/rex/arch/sparc.rb', line 30

def self.sethi(constant, dst)
  [
    (RegisterNumber[dst] << 25) |
    (4 << 22) |
    (constant >> 10)
  ].pack('N')
end