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author | Brad King <brad.king@kitware.com> | 2014-07-21 18:31:04 (GMT) |
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committer | Brad King <brad.king@kitware.com> | 2014-07-21 19:54:44 (GMT) |
commit | 133d42fe59e2f15610afaed287ef80ec4ff6f888 (patch) | |
tree | ea0831dc0601b3e91c3881d9f182c085ad4fffe2 /Utilities/cmliblzma/liblzma/simple/powerpc.c | |
parent | 8510533f0e713abeedf53a737c702d683b636ecb (diff) | |
parent | c289e63491982dd8aed7c6b6f54d390df91aaf95 (diff) | |
download | CMake-133d42fe59e2f15610afaed287ef80ec4ff6f888.zip CMake-133d42fe59e2f15610afaed287ef80ec4ff6f888.tar.gz CMake-133d42fe59e2f15610afaed287ef80ec4ff6f888.tar.bz2 |
Merge branch 'liblzma-upstream' into add-liblzma
Diffstat (limited to 'Utilities/cmliblzma/liblzma/simple/powerpc.c')
-rw-r--r-- | Utilities/cmliblzma/liblzma/simple/powerpc.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Utilities/cmliblzma/liblzma/simple/powerpc.c b/Utilities/cmliblzma/liblzma/simple/powerpc.c new file mode 100644 index 0000000..6f83511 --- /dev/null +++ b/Utilities/cmliblzma/liblzma/simple/powerpc.c @@ -0,0 +1,73 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file powerpc.c +/// \brief Filter for PowerPC (big endian) binaries +/// +// Authors: Igor Pavlov +// Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "simple_private.h" + + +static size_t +powerpc_code(lzma_simple *simple lzma_attribute((__unused__)), + uint32_t now_pos, bool is_encoder, + uint8_t *buffer, size_t size) +{ + size_t i; + for (i = 0; i + 4 <= size; i += 4) { + // PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link) + if ((buffer[i] >> 2) == 0x12 + && ((buffer[i + 3] & 3) == 1)) { + + const uint32_t src = ((buffer[i + 0] & 3) << 24) + | (buffer[i + 1] << 16) + | (buffer[i + 2] << 8) + | (buffer[i + 3] & (~3)); + + uint32_t dest; + if (is_encoder) + dest = now_pos + (uint32_t)(i) + src; + else + dest = src - (now_pos + (uint32_t)(i)); + + buffer[i + 0] = 0x48 | ((dest >> 24) & 0x03); + buffer[i + 1] = (dest >> 16); + buffer[i + 2] = (dest >> 8); + buffer[i + 3] &= 0x03; + buffer[i + 3] |= dest; + } + } + + return i; +} + + +static lzma_ret +powerpc_coder_init(lzma_next_coder *next, lzma_allocator *allocator, + const lzma_filter_info *filters, bool is_encoder) +{ + return lzma_simple_coder_init(next, allocator, filters, + &powerpc_code, 0, 4, 4, is_encoder); +} + + +extern lzma_ret +lzma_simple_powerpc_encoder_init(lzma_next_coder *next, + lzma_allocator *allocator, const lzma_filter_info *filters) +{ + return powerpc_coder_init(next, allocator, filters, true); +} + + +extern lzma_ret +lzma_simple_powerpc_decoder_init(lzma_next_coder *next, + lzma_allocator *allocator, const lzma_filter_info *filters) +{ + return powerpc_coder_init(next, allocator, filters, false); +} |