1207753Smm/////////////////////////////////////////////////////////////////////////////// 2207753Smm// 3207753Smm/// \file sparc.c 4207753Smm/// \brief Filter for SPARC binaries 5207753Smm/// 6207753Smm// Authors: Igor Pavlov 7207753Smm// Lasse Collin 8207753Smm// 9207753Smm// This file has been put into the public domain. 10207753Smm// You can do whatever you want with this file. 11207753Smm// 12207753Smm/////////////////////////////////////////////////////////////////////////////// 13207753Smm 14207753Smm#include "simple_private.h" 15207753Smm 16207753Smm 17207753Smmstatic size_t 18312518Sdelphijsparc_code(void *simple lzma_attribute((__unused__)), 19207753Smm uint32_t now_pos, bool is_encoder, 20207753Smm uint8_t *buffer, size_t size) 21207753Smm{ 22207753Smm size_t i; 23207753Smm for (i = 0; i + 4 <= size; i += 4) { 24207753Smm 25207753Smm if ((buffer[i] == 0x40 && (buffer[i + 1] & 0xC0) == 0x00) 26207753Smm || (buffer[i] == 0x7F 27207753Smm && (buffer[i + 1] & 0xC0) == 0xC0)) { 28207753Smm 29207753Smm uint32_t src = ((uint32_t)buffer[i + 0] << 24) 30207753Smm | ((uint32_t)buffer[i + 1] << 16) 31207753Smm | ((uint32_t)buffer[i + 2] << 8) 32207753Smm | ((uint32_t)buffer[i + 3]); 33207753Smm 34207753Smm src <<= 2; 35207753Smm 36207753Smm uint32_t dest; 37207753Smm if (is_encoder) 38207753Smm dest = now_pos + (uint32_t)(i) + src; 39207753Smm else 40207753Smm dest = src - (now_pos + (uint32_t)(i)); 41207753Smm 42207753Smm dest >>= 2; 43207753Smm 44207753Smm dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) 45207753Smm | (dest & 0x3FFFFF) 46207753Smm | 0x40000000; 47207753Smm 48207753Smm buffer[i + 0] = (uint8_t)(dest >> 24); 49207753Smm buffer[i + 1] = (uint8_t)(dest >> 16); 50207753Smm buffer[i + 2] = (uint8_t)(dest >> 8); 51207753Smm buffer[i + 3] = (uint8_t)(dest); 52207753Smm } 53207753Smm } 54207753Smm 55207753Smm return i; 56207753Smm} 57207753Smm 58207753Smm 59207753Smmstatic lzma_ret 60292588Sdelphijsparc_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, 61207753Smm const lzma_filter_info *filters, bool is_encoder) 62207753Smm{ 63207753Smm return lzma_simple_coder_init(next, allocator, filters, 64207753Smm &sparc_code, 0, 4, 4, is_encoder); 65207753Smm} 66207753Smm 67207753Smm 68207753Smmextern lzma_ret 69207753Smmlzma_simple_sparc_encoder_init(lzma_next_coder *next, 70292588Sdelphij const lzma_allocator *allocator, 71292588Sdelphij const lzma_filter_info *filters) 72207753Smm{ 73207753Smm return sparc_coder_init(next, allocator, filters, true); 74207753Smm} 75207753Smm 76207753Smm 77207753Smmextern lzma_ret 78207753Smmlzma_simple_sparc_decoder_init(lzma_next_coder *next, 79292588Sdelphij const lzma_allocator *allocator, 80292588Sdelphij const lzma_filter_info *filters) 81207753Smm{ 82207753Smm return sparc_coder_init(next, allocator, filters, false); 83207753Smm} 84