Commit Graph

1116 Commits

Author SHA1 Message Date
Bryce Denney
b8ecf5b118 - apply patch.smp-sync-arb-ids. This patch adds a local APIC behavior
that was missing before, the special "INIT Level Deassert" synchronize
  arbitration ID trick.
2002-03-25 01:58:34 +00:00
instinc
dabe63ef72 added a control variable for debugger to know if register tracing is required or not 2001-10-03 19:53:48 +00:00
Bryce Denney
daf2a9fb55 - add RCS Id to header of every file. This makes it easier to know what's
going on when someone sends in a modified file.
2001-10-03 13:10:38 +00:00
Bryce Denney
6a1c01c8b5 - back out my poorly written patch.virtual-address-checks-overflow 2001-10-02 20:01:29 +00:00
Bryce Denney
67ebaaca87 - apply patch.virtual-addr-checks-overflow to fix bug
[ #433759 ] virtual address checks can overflow
  > Bochs has been crashing in some cases when you try to access data which
  > overlaps the segment limit, when the segment limit is near the 32-bit
  > boundary.  The example that came up a few times is reading/writing 4 bytes
  > starting at 0xffffffff when the segment limit was 0xffffffff.  The
  > condition used to compare offset+length-1 with the limit, but
  > offset+length-1 was overflowing so the comparison went wrong.  This patch
  > changes the condition so that it supports all segment limits except for
  > sizes 0,1,2,3 bytes.  Dave and I figured that these sizes would not be
  > needed, while size 0xffffffff is used quite a lot.
2001-10-02 17:02:28 +00:00
Bryce Denney
fd7e7ee86c - added debugger command "info fpu" which prints all FPU registers
in an output format similar to gdb (when you do info all-registers).
  Also, if you do "info all" you get the CPU registers and the FPU
  registers.
- added bx_cpu_c method called fpu_print_regs, which is implemented
  in wmFPUemu_glue.cc
2001-09-15 06:55:14 +00:00
Bryce Denney
ad11335293 - remove space after line continuation character.
Thanks to Martijn Boekhorst <Martijn@boekhorst.net> for pointing it out.
2001-09-11 23:32:14 +00:00
Bryce Denney
3d29d5d614 - add instrumentation macros for begin and end opcode. These are usually
defined to be empty, so there should be no effect except for instrumentation
2001-06-28 19:45:44 +00:00
Bryce Denney
f822257511 - there were cases where BX_APIC_SUPPORT were used and others where
BX_SUPPORT_APIC were used.  To follow the pattern used by other
  names like this, I changed them all to BX_SUPPORT_APIC.
  Thanks to Tom Lindström for chasing this down!
2001-06-12 13:07:43 +00:00
Bryce Denney
565fa8ea8e - another speed boost: when not using SMP, use
BX_CPU_C bx_cpu;
     BX_MEM_C bx_mem;
  and when more than one processor, use
     BX_CPU_C    *bx_cpu_array[BX_SMP_PROCESSORS];
     BX_MEM_C    *bx_mem_array[BX_ADDRESS_SPACES];
  The changeover is controlled by BX_SMP_PROCESSORS, but there are only
  a few code changes since nearly all code uses the BX_CPU(n) and BX_MEM(n)
  macros.
- This turns out to make a 10% speed difference!  With this revision,
  the CVS version now gets 95% of the performance of the 3/25/2000
  snapshot, which I've been using as my baseline.
2001-06-05 17:35:08 +00:00
Bryce Denney
49664f7503 - parts of the SMP merge apparantly broke the debugger and this revision
tries to fix it.  The shortcuts to register names such as AX and DL are
  #defines in cpu/cpu.h, and they are defined in terms of BX_CPU_THIS_PTR.
  When BX_USE_CPU_SMF=1, this works fine.  (This is what bochs used for
  a long time, and nobody used the SMF=0 mode at all.)  To make SMP bochs
  work, I had to get SMF=0 mode working for the CPU so that there could
  be an array of cpus.

  When SMF=0 for the CPU, BX_CPU_THIS_PTR is defined to be "this->" which
  only works within methods of BX_CPU_C.  Code outside of BX_CPU_C must
  reference BX_CPU(num) instead.
- to try to enforce the correct use of AL/AX/DL/etc. shortcuts, they are
  now only #defined when "NEED_CPU_REG_SHORTCUTS" is #defined.  This is
  only done in the cpu/*.cc code.
2001-05-24 18:46:34 +00:00
Bryce Denney
e61d00351f - merged BRANCH-smp-bochs into main branch. For details see comments
in BRANCH-smp-bochs revisions.
- The general task was to make multiple CPU's which communicate
  through their APICs.  So instead of BX_CPU and BX_MEM, we now have
  BX_CPU(x) and BX_MEM(y).  For an SMP simulation you have several
  processors in a shared memory space, so there might be processors
  BX_CPU(0..3) but only one memory space BX_MEM(0).  For cosimulation,
  you could have BX_CPU(0) with BX_MEM(0), then BX_CPU(1) with
  BX_MEM(1).  WARNING: Cosimulation is almost certainly broken by the
  SMP changes.
- to simulate multiple CPUs, you have to give each CPU time to execute
  in turn.  This is currently implemented using debugger guards.  The
  cpu loop steps one CPU for a few instructions, then steps the
  next CPU for a few instructions, etc.
- there is some limited support in the debugger for two CPUs, for
  example printing information from each CPU when single stepping.
2001-05-23 08:16:07 +00:00
Todd T.Fries
bdb89cd364 merge in BRANCH-io-cleanup.
To see the commit logs for this use either cvsweb or
cvs update -r BRANCH-io-cleanup and then 'cvs log' the various files.

In general this provides a generic interface for logging.

logfunctions:: is a class that is inherited by some classes, and also
.   allocated as a standalone global called 'genlog'.  All logging uses
.   one of the ::info(), ::error(), ::ldebug(), ::panic() methods of this
.   class through 'BX_INFO(), BX_ERROR(), BX_DEBUG(), BX_PANIC()' macros
.   respectively.
.
.   An example usage:
.     BX_INFO(("Hello, World!\n"));

iofunctions:: is a class that is allocated once by default, and assigned
as the iofunction of each logfunctions instance.  It is this class that
maintains the file descriptor and other output related code, at this
point using vfprintf().  At some future point, someone may choose to
write a gui 'console' for bochs to which messages would be redirected
simply by assigning a different iofunction class to the various logfunctions
objects.

More cleanup is coming, but this works for now.  If you want to see alot
of debugging output, in main.cc, change onoff[LOGLEV_DEBUG]=0 to =1.

Comments, bugs, flames, to me: todd@fries.net
2001-05-15 14:49:57 +00:00
Bryce Denney
a6fef54678 - update copyright dates to 2001 for all mandrake headers
- for bochs files with other header, replaced with current mandrake header
2001-04-10 02:20:02 +00:00
Bryce Denney
4e04f4cb58 - change all inline declarations to one of two macros: BX_C_INLINE or
BX_CPP_INLINE.  Then in config.h.in you can define these two as you
  wish.
2001-04-10 02:10:09 +00:00
cvs
beff63eb32 - entered original Bochs snapshot bochs-2000_0325a.tar.gz from
ftp.bochs.com
2001-04-10 01:04:59 +00:00