1 /** 2 * \file lzma/bcj.h 3 * \brief Branch/Call/Jump conversion filters 4 */ 5 6 /* 7 * Author: Lasse Collin 8 * 9 * This file has been put into the public domain. 10 * You can do whatever you want with this file. 11 * 12 * See ../lzma.h for information about liblzma as a whole. 13 */ 14 15 #ifndef LZMA_H_INTERNAL 16 # error Never include this file directly. Use <lzma.h> instead. 17 #endif 18 19 20 /* Filter IDs for lzma_filter.id */ 21 22 #define LZMA_FILTER_X86 LZMA_VLI_C(0x04) 23 /**< 24 * Filter for x86 binaries 25 */ 26 27 #define LZMA_FILTER_POWERPC LZMA_VLI_C(0x05) 28 /**< 29 * Filter for Big endian PowerPC binaries 30 */ 31 32 #define LZMA_FILTER_IA64 LZMA_VLI_C(0x06) 33 /**< 34 * Filter for IA-64 (Itanium) binaries. 35 */ 36 37 #define LZMA_FILTER_ARM LZMA_VLI_C(0x07) 38 /**< 39 * Filter for ARM binaries. 40 */ 41 42 #define LZMA_FILTER_ARMTHUMB LZMA_VLI_C(0x08) 43 /**< 44 * Filter for ARM-Thumb binaries. 45 */ 46 47 #define LZMA_FILTER_SPARC LZMA_VLI_C(0x09) 48 /**< 49 * Filter for SPARC binaries. 50 */ 51 52 53 /** 54 * \brief Options for BCJ filters 55 * 56 * The BCJ filters never change the size of the data. Specifying options 57 * for them is optional: if pointer to options is NULL, default value is 58 * used. You probably never need to specify options to BCJ filters, so just 59 * set the options pointer to NULL and be happy. 60 * 61 * If options with non-default values have been specified when encoding, 62 * the same options must also be specified when decoding. 63 * 64 * \note At the moment, none of the BCJ filters support 65 * LZMA_SYNC_FLUSH. If LZMA_SYNC_FLUSH is specified, 66 * LZMA_OPTIONS_ERROR will be returned. If there is need, 67 * partial support for LZMA_SYNC_FLUSH can be added in future. 68 * Partial means that flushing would be possible only at 69 * offsets that are multiple of 2, 4, or 16 depending on 70 * the filter, except x86 which cannot be made to support 71 * LZMA_SYNC_FLUSH predictably. 72 */ 73 typedef struct { 74 /** 75 * \brief Start offset for conversions 76 * 77 * This setting is useful only when the same filter is used 78 * _separately_ for multiple sections of the same executable file, 79 * and the sections contain cross-section branch/call/jump 80 * instructions. In that case it is beneficial to set the start 81 * offset of the non-first sections so that the relative addresses 82 * of the cross-section branch/call/jump instructions will use the 83 * same absolute addresses as in the first section. 84 * 85 * When the pointer to options is NULL, the default value (zero) 86 * is used. 87 */ 88 uint32_t start_offset; 89 90 } lzma_options_bcj; 91