arch_ppc32.py

   1 from core import ADDR, REG
   2 from archutils import *
   3
   4
   5 BITNESS = 32
   6 ENDIANNESS = "big"
   7
   8 ALL_REGS = {REG("r0"), REG("sp"), REG("rtoc")} | reg_range("r", 3, 31)
   9
  10
  11 def call_params(addr):
  12     return reg_range("r", 3, 10)
  13
  14
  15 def param_filter(regs):
  16     # Assume for now that all parameters will be passed in registers.
  17     # This must be good enough to cover the most usage cases.
  18     # The following cases will break it:
  19     # - functions accepting more then 8 params
  20     # - functions accepting floating-point params
  21     # - variadic functions
  22     return reg_continuous_subrange(regs, reg_range("r", 3, 10))
  23
  24
  25 def call_ret(addr):
  26     return {REG("r3")}
  27
  28
  29 def ret_filter(regs):
  30     # Assuming there is no floating-point stuff
  31     return {REG("r3")}
  32
  33
  34 def call_save(addr):
  35     return reg_range("r", 13, 31) | {REG("sp")}
  36
  37
  38 def call_defs(addr):
  39     return call_ret(addr) | (ALL_REGS - call_save(addr))
  40
  41
  42 def ret_uses(cfg):
  43     return set()