reactos/boot/freeldr/freeldr/arch/powerpc/ofw_util.s

   1         .section .text
   2         .globl ofw_functions
   3         .globl ofw_call_addr
   4         .globl call_ofw
   5 call_ofw:
   6        /* R3 has the function offset to call (n * 4)
   7         * Other arg registers are unchanged. */
   8        subi    %r1,%r1,0x100
   9        stw     %r8,24(%r1)
  10        mflr    %r8
  11        stw     %r8,0(%r1)
  12        stw     %r3,4(%r1)
  13        stw     %r4,8(%r1)
  14        stw     %r5,12(%r1)
  15        stw     %r6,16(%r1)
  16        stw     %r7,20(%r1)
  17        stw     %r9,28(%r1)
  18        stw     %r10,32(%r1)
  19        stw     %r20,36(%r1)
  20
  21        lis     %r10,ofw_functions@ha
  22        addi    %r8,%r10,ofw_functions@l
  23        add     %r8,%r3,%r8
  24        lwz     %r9,0(%r8)
  25        mtctr   %r9
  26
  27        mr      %r3,%r4
  28        mr      %r4,%r5
  29        mr      %r5,%r6
  30        mr      %r6,%r7
  31        mr      %r7,%r8
  32        mr      %r8,%r9
  33
  34        /* Call ofw proxy function */
  35        bctrl
  36
  37        lwz     %r8,0(%r1)
  38        mtlr    %r8
  39        lwz     %r4,8(%r1)
  40        lwz     %r5,12(%r1)
  41        lwz     %r6,16(%r1)
  42        lwz     %r7,20(%r1)
  43        lwz     %r8,24(%r1)
  44        lwz     %r9,28(%r1)
  45        lwz     %r10,32(%r1)
  46        lwz     %r20,36(%r1)
  47        addi    %r1,%r1,0x100
  48        blr
  49