The 82c54 model (pit.cc) implements timer modes 0, 2, and 3 in its handler
functions, without caring which timer number is involved. However, the
I/O write code that sets the mode is inconsistent.
Timer 0 can be set to modes 0,2,3 only.
Timer 1 can be set to mode 2 only.
Timer 2 can be set to mode 2,3 only.
From a quick reading of an 8254 datasheet, I can't see any reason to
restrict which timer can be in which mode, so I think it's correct to
allow ALL timers to go into ALL modes that are implemented.
unfortunately is the same as the C library function fabs. Many
compilers seem to use the static one with no complaint, but others
don't like it. Just rename fabs, to eliminate the potential
conflict.
For compilers (such as Microsoft VC++) which don't allow "LL" after a
constant to make it 64-bit, this patch declares all such constants as
BX_CONST64(value). Then in config.in, a switch called
BX_64BIT_CONSTANTS_USE_LL controls whether the macro puts the
LL's in or not. Configure sets the macro, if you're on a platform
that can run such things.
- use Bit64u and other compiler-independent types
- moved contents of macutils.* into osdep.*.
- now in osdep.h, I allow all code to use the real library function name.
If that function is not available, #define it to point to the
bx_* replacement function instead. And cause the bx_* replacement
function to be compiled in osdep.cc.
- check for snprintf, strtoull
- check if empty structs allowed
- check for hash_map.h
- check for blank labels as in void main () { int x=2; label: }
- if debugger, turn on disasm too
didn't compile with some compiler.
- put conditional "#if BX_HAVE_HASH_MAP" around code that uses
<hash_map.h>.
- replace calls to snprintf with bx_snprintf.
- arg1 of bx_dbg_watch is an int, not a Boolean.
- put /*comments symbols*/ around any chars after #endif. Other compilers
do not get it.
- fix cases in which a pointer is cast to a 32-bit int, then back to a
pointer. This breaks on a machine with 64-bit pointers. Examples:
FPU_sub arg 2 and FPU_div arg 2. The int->ptr->int conversions are
now done more safely by macros REGNO2PTR and PTR2INT.
- use GCC_ATTRIBUTE macro instead of __attribute__. For compilers that
do not support __attribute__, the macro can be defined to be nothing.
- in fpu_entry.c, arg1 of FPU_load_int32 is (s32*), but the calls to
it cast their data to (u32*).
- if compiler does NOT inline functions in poly.h, the "extern inline"
setting caused duplicate symbols to be created. Changed them to
"static inline" so that the mul_32_32 from different .c files do not
conflict.
- implemented setcc so that it doesn't use curly brackets inside parens
- comment out sigcontext structure definition, which conflicts with
non-linux or non-intel operating systems. It's not used by bochs anyway.
Bryce Denney