snickerbockers

mem_access

this is an object that tracks a memory access (either read or write) in a code block. There will be one mem_access object for each memory access; thus any given code block could contain several mem_access objects or none at all.

mem_access will contain information that will be needed to backpatch the corresponding memory access; alternatively we might instead recompile the entire code block instead of backpatching (probably less efficient but also less complicated).

snickerbockers

perl -pe 's;^(.*)$;\"\1\\n\";;' < input.txt

snickerbockers

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; AUTOMATICALLY GENERATED BY WASHINGTONDC
;;
;; This is WashingtonDC's config file.  Config settings consist of a config
;; name followed by its value on the same line
;; the semicolon (;) character can be used to create single-line comments
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

snickerbockers

#!/usr/bin/env perl

###################################################################
#
# calc.pl
#
# simple compiler for evaluating polynomial expressions in the correct
# order based on operator precedence
#
# input is taken from either stdin or arguments (using perl's ARGV file handle)

snickerbockers

(gdb) hbreak *0x0c17218a
Hardware assisted breakpoint 1 at 0xc17218a
(gdb) c
Continuing.
Breakpoint 1, 0x0c17218a in ?? ()
1: x/i $pc
=> 0xc17218a:	mov.l	@r10,r8
(gdb) si
p0x0c17218c in ?? ()
1: x/i $pc

snickerbockers

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
  5.25      0.57     0.57 314561309     0.00     0.00  arm7_decode
  4.79      1.09     0.52                             sh4_sq_pref
  4.61      1.59     0.50   169386     0.00     0.02  run_to_next_arm7_event
  4.61      2.09     0.50 213494262     0.00     0.00  memory_map_read_double
  4.06      2.53     0.44 216297650     0.00     0.00  memory_map_write_double

snickerbockers

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
  7.13      4.01     4.01 923943802     0.00     0.00  memory_map_read_double
  4.38      6.47     2.46 517213049     0.00     0.00  memory_map_write_double
  4.19      8.82     2.35                             memory_map_write_float
  4.16     11.15     2.34 249065856     0.00     0.00  pvr2_framebuffer_notify_write
  3.82     13.30     2.15                             memory_map_write_16

snickerbockers

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
 12.24      8.81     8.81 980745394     0.00     0.00  pvr2_framebuffer_notify_write
  5.79     12.98     4.17 923958452     0.00     0.00  memory_map_read_double
  4.31     16.08     3.11 30488481     0.00     0.00  pvr2_tex_mem_64bit_write_raw
  3.81     18.83     2.75 517221569     0.00     0.00  memory_map_write_double
  3.54     21.37     2.55 1115240679     0.00     0.00  pvr2_tex_mem_64bit_read8

snickerbockers

#!/usr/bin/env python

import sys

N_FRAC_BITS = 16

val = val_orig = float(sys.argv[1])
frac_part = 0

for i in range(N_FRAC_BITS):

snickerbockers

snckrs@Tails:~/ghidra_projects/netbsd_crash$ telnet localhost 1998
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
[   1.0000000] Loaded initial symtab at 0x8c3949ac, strtab at 0x8c3c1adc, # entries 11524
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
[   1.0000000]     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
[   1.0000000]     2018, 2019, 2020 The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.