pintos-os.org Git - pintos-anon/blob - src/misc/bochs-2.2.6-jitter.patch

   1 diff -urp bochs-2.2.6/iodev/pit82c54.cc bochs-2.2.6.orig/iodev/pit82c54.cc
   2 --- bochs-2.2.6.orig/iodev/pit82c54.cc  2006-01-08 12:39:08.000000000 -0800
   3 +++ bochs-2.2.6/iodev/pit82c54.cc       2006-04-03 14:00:27.000000000 -0700
   4 @@ -28,6 +28,7 @@
   5
   6  #include "iodev.h"
   7  #include "pit82c54.h"
   8 +#include <stdlib.h>
   9  #define LOG_THIS this->
  10
  11
  12 @@ -359,7 +360,13 @@
  13        case 2:
  14         if(thisctr.count_written) {
  15           if(thisctr.triggerGATE || thisctr.first_pass) {
  16 -           set_count(thisctr, thisctr.inlatch);
  17 +            unsigned n = thisctr.inlatch;
  18 +            if (jitter && n > 5) {
  19 +                n *= (double) rand() / RAND_MAX;
  20 +                if (n < 5)
  21 +                    n = 5;
  22 +            }
  23 +           set_count(thisctr, n);
  24             thisctr.next_change_time=(thisctr.count_binary-1) & 0xFFFF;
  25             thisctr.null_count=0;
  26             if(thisctr.inlatch==1) {
  27 diff -urp bochs-2.2.6/main.cc bochs-2.2.6.orig/main.cc
  28 --- bochs-2.2.6.orig/main.cc    2006-01-22 04:31:15.000000000 -0800
  29 +++ bochs-2.2.6/main.cc 2006-04-03 14:00:54.000000000 -0700
  30 @@ -105,6 +105,7 @@
  31  #endif
  32
  33  char *bochsrc_filename = NULL;
  34 +int jitter = 0;
  35
  36  void bx_print_header ()
  37  {
  38 @@ -459,6 +460,13 @@
  39      else if (!strcmp ("-q", argv[arg])) {
  40        SIM->get_param_enum(BXP_BOCHS_START)->set (BX_QUICK_START);
  41      }
  42 +    else if (!strcmp ("-j", argv[arg])) {
  43 +      if (++arg >= argc) BX_PANIC(("-j must be followed by a number"));
  44 +      else {
  45 +        jitter = 1;
  46 +        srand (atoi (argv[arg]));
  47 +      }
  48 +    }
  49      else if (!strcmp ("-f", argv[arg])) {
  50        if (++arg >= argc) BX_PANIC(("-f must be followed by a filename"));
  51        else bochsrc_filename = argv[arg];
  52 diff -up /home/blp/cs140/bochs-2.2.6/bochs.h\~ /home/blp/cs140/bochs-2.2.6/bochs.h
  53 --- bochs-2.2.6/bochs.h.orig    2006-01-28 08:16:02.000000000 -0800
  54 +++ bochs-2.2.6/bochs.h 2006-04-03 14:03:54.000000000 -0700
  55 @@ -698,4 +698,6 @@ int bx_init_hardware ();
  56
  57  #endif
  58
  59 +extern int jitter;
  60 +
  61  #endif  /* BX_BOCHS_H */