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