37 lines
832 B
C
37 lines
832 B
C
/* BranchPPC.c */
|
|
|
|
#include "BranchPPC.h"
|
|
|
|
UInt32 PPC_B_Convert(Byte *data, UInt32 size, UInt32 nowPos, int encoding)
|
|
{
|
|
UInt32 i;
|
|
for (i = 0; i + 4 <= size; i += 4)
|
|
{
|
|
/* PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link) */
|
|
if ((data[i] >> 2) == 0x12 &&
|
|
(
|
|
(data[i + 3] & 3) == 1
|
|
/* || (data[i+3] & 3) == 3 */
|
|
)
|
|
)
|
|
{
|
|
UInt32 src = ((data[i + 0] & 3) << 24) |
|
|
(data[i + 1] << 16) |
|
|
(data[i + 2] << 8) |
|
|
(data[i + 3] & (~3));
|
|
|
|
UInt32 dest;
|
|
if (encoding)
|
|
dest = nowPos + i + src;
|
|
else
|
|
dest = src - (nowPos + i);
|
|
data[i + 0] = (Byte)(0x48 | ((dest >> 24) & 0x3));
|
|
data[i + 1] = (Byte)(dest >> 16);
|
|
data[i + 2] = (Byte)(dest >> 8);
|
|
data[i + 3] &= 0x3;
|
|
data[i + 3] |= dest;
|
|
}
|
|
}
|
|
return i;
|
|
}
|