Mercurial > repos > blastem
annotate x86_backend.c @ 621:5196333b37a6
Fix a few values reported by the vr debugger command. Add DMA registers to vr debugger command. Fix horizontal interrupt bug. Slightly more accurate (but still broken) handling of switches between H32 and H40 modes.
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 16 Jun 2014 19:13:28 -0700 |
parents | 140af5509ce7 |
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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6 #include "x86_backend.h" |
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7 #include <stdlib.h> |
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8 |
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9 deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest) |
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10 { |
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11 deferred_addr * new_head = malloc(sizeof(deferred_addr)); |
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12 new_head->next = old_head; |
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13 new_head->address = address & 0xFFFFFF; |
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14 new_head->dest = dest; |
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15 return new_head; |
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16 } |
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17 |
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18 void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to) |
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19 { |
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20 for(deferred_addr *cur = *head_ptr; cur && cur != remove_to; cur = *head_ptr) |
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21 { |
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22 *head_ptr = cur->next; |
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23 free(cur); |
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24 } |
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25 } |
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27 void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native) |
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28 { |
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29 deferred_addr * cur = *head_ptr; |
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30 deferred_addr **last_next = head_ptr; |
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31 while(cur) |
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32 { |
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33 uint8_t * native = get_native(context, cur->address);//get_native_address(opts->native_code_map, cur->address); |
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34 if (native) { |
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35 int32_t disp = native - (cur->dest + 4); |
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36 uint8_t * out = cur->dest; |
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37 *(out++) = disp; |
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38 disp >>= 8; |
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39 *(out++) = disp; |
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40 disp >>= 8; |
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41 *(out++) = disp; |
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42 disp >>= 8; |
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43 *out = disp; |
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44 *last_next = cur->next; |
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45 free(cur); |
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46 cur = *last_next; |
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47 } else { |
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48 last_next = &(cur->next); |
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49 cur = cur->next; |
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50 } |
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51 } |
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52 } |
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