package/emulators/dosbox/ppc64le-dynrec-cache.diff

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   2 # T2 SDE: package/*/dosbox/ppc64le-dynrec-cache.diff
   3 # Copyright (C) 2024 The T2 SDE Project
   4 #
   5 # This Copyright note is generated by scripts/Create-CopyPatch,
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   8 # This patch file is dual-licensed. It is available under the license the
   9 # patched project is licensed under, as long as it is an OpenSource license
  10 # as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
  11 # of the GNU General Public License version 2 as used by the T2 SDE.
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  13
  14 Index: src/cpu/core_dynrec/cache.h
  15 ===================================================================
  16 --- ./src/cpu/core_dynrec/cache.h       (revision 4296)
  17 +++ ./src/cpu/core_dynrec/cache.h       (working copy)
  18 @@ -553,8 +553,8 @@
  19
  20  static void dyn_return(BlockReturn retcode,bool ret_exception);
  21  static void dyn_run_code(void);
  22 +static void cache_block_closing(Bit8u* block_start,Bitu block_size);
  23
  24 -
  25  /* Define temporary pagesize so the MPROTECT case and the regular case share as much code as possible */
  26  #if (C_HAVE_MPROTECT)
  27  #define PAGESIZE_TEMP PAGESIZE
  28 @@ -614,19 +614,25 @@
  29                 }
  30                 // setup the default blocks for block linkage returns
  31                 cache.pos=&cache_code_link_blocks[0];
  32 +               core_dynrec.runcode=(BlockReturn (*)(Bit8u*))cache.pos;
  33 +               // can use op to PAGESIZE_TEMP-64 bytes
  34 +               dyn_run_code();
  35 +               cache_block_closing(cache_code_link_blocks, cache.pos-cache_code_link_blocks);
  36 +
  37 +               cache.pos=&cache_code_link_blocks[PAGESIZE_TEMP-64];
  38                 link_blocks[0].cache.start=cache.pos;
  39                 // link code that returns with a special return code
  40 +               // must be less than 32 bytes
  41                 dyn_return(BR_Link1,false);
  42 -               cache.pos=&cache_code_link_blocks[32];
  43 +               cache_block_closing(link_blocks[0].cache.start, cache.pos-link_blocks[0].cache.start);
  44 +
  45 +               cache.pos=&cache_code_link_blocks[PAGESIZE_TEMP-32];
  46                 link_blocks[1].cache.start=cache.pos;
  47                 // link code that returns with a special return code
  48 +               // must be less than 32 bytes
  49                 dyn_return(BR_Link2,false);
  50 +               cache_block_closing(link_blocks[1].cache.start, cache.pos-link_blocks[1].cache.start);
  51
  52 -               cache.pos=&cache_code_link_blocks[64];
  53 -               core_dynrec.runcode=(BlockReturn (*)(Bit8u*))cache.pos;
  54 -//             link_blocks[1].cache.start=cache.pos;
  55 -               dyn_run_code();
  56 -
  57                 cache.free_pages=0;
  58                 cache.last_page=0;
  59                 cache.used_pages=0;