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comparison m68k_core.c @ 725:a92ca6f0ed83

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Fix out of bounds memory access when an instruction wraps around the end of memory
author Michael Pavone <pavone@retrodev.com>
date Fri, 22 May 2015 21:11:41 -0700
parents f9b80a78d9a6
children 7367b14ac01c
comparison
equal deleted inserted replaced
724:2174f92c5f9b 725:a92ca6f0ed83
634 memset(native_code_map[chunk].offsets, 0xFF, sizeof(int32_t) * NATIVE_CHUNK_SIZE); 634 memset(native_code_map[chunk].offsets, 0xFF, sizeof(int32_t) * NATIVE_CHUNK_SIZE);
635 } 635 }
636 uint32_t offset = address % NATIVE_CHUNK_SIZE; 636 uint32_t offset = address % NATIVE_CHUNK_SIZE;
637 native_code_map[chunk].offsets[offset] = native_addr-native_code_map[chunk].base; 637 native_code_map[chunk].offsets[offset] = native_addr-native_code_map[chunk].base;
638 for(address++,size-=2; size; address++,size-=2) { 638 for(address++,size-=2; size; address++,size-=2) {
639 address &= opts->gen.address_mask >> 1;
639 chunk = address / NATIVE_CHUNK_SIZE; 640 chunk = address / NATIVE_CHUNK_SIZE;
640 offset = address % NATIVE_CHUNK_SIZE; 641 offset = address % NATIVE_CHUNK_SIZE;
641 if (!native_code_map[chunk].base) { 642 if (!native_code_map[chunk].base) {
642 native_code_map[chunk].base = native_addr; 643 native_code_map[chunk].base = native_addr;
643 native_code_map[chunk].offsets = malloc(sizeof(int32_t) * NATIVE_CHUNK_SIZE); 644 native_code_map[chunk].offsets = malloc(sizeof(int32_t) * NATIVE_CHUNK_SIZE);