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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 21:12:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 21:12:04 +0000 |
commit | eac54b7c4aec25060d7bd856f7cdc290943d6aae (patch) | |
tree | 9a6d81c9f88df4698e746d63d14ddafeddd918b8 /src/liblzma/simple/arm.c | |
parent | Initial commit. (diff) | |
download | xz-utils-eac54b7c4aec25060d7bd856f7cdc290943d6aae.tar.xz xz-utils-eac54b7c4aec25060d7bd856f7cdc290943d6aae.zip |
Adding upstream version 5.4.1.upstream/5.4.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/liblzma/simple/arm.c')
-rw-r--r-- | src/liblzma/simple/arm.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/liblzma/simple/arm.c b/src/liblzma/simple/arm.c new file mode 100644 index 0000000..6e53970 --- /dev/null +++ b/src/liblzma/simple/arm.c @@ -0,0 +1,75 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file arm.c +/// \brief Filter for ARM 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 +arm_code(void *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) { + if (buffer[i + 3] == 0xEB) { + uint32_t src = ((uint32_t)(buffer[i + 2]) << 16) + | ((uint32_t)(buffer[i + 1]) << 8) + | (uint32_t)(buffer[i + 0]); + src <<= 2; + + uint32_t dest; + if (is_encoder) + dest = now_pos + (uint32_t)(i) + 8 + src; + else + dest = src - (now_pos + (uint32_t)(i) + 8); + + dest >>= 2; + buffer[i + 2] = (dest >> 16); + buffer[i + 1] = (dest >> 8); + buffer[i + 0] = dest; + } + } + + return i; +} + + +static lzma_ret +arm_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, + const lzma_filter_info *filters, bool is_encoder) +{ + return lzma_simple_coder_init(next, allocator, filters, + &arm_code, 0, 4, 4, is_encoder); +} + + +#ifdef HAVE_ENCODER_ARM +extern lzma_ret +lzma_simple_arm_encoder_init(lzma_next_coder *next, + const lzma_allocator *allocator, + const lzma_filter_info *filters) +{ + return arm_coder_init(next, allocator, filters, true); +} +#endif + + +#ifdef HAVE_DECODER_ARM +extern lzma_ret +lzma_simple_arm_decoder_init(lzma_next_coder *next, + const lzma_allocator *allocator, + const lzma_filter_info *filters) +{ + return arm_coder_init(next, allocator, filters, false); +} +#endif |