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22 Commits

Author SHA1 Message Date
Robert Nordier
3d04f230e5 Revise a few comments. 1998-11-02 17:53:08 +00:00
Robert Nordier
3b1bd5ae35 Ignore, rather than emulate, an i386 'hlt' instruction (though for 
most practical purposes, this should be indistinguishable from a
more strictly correct approach).

Feedback and testing: msmith
 1998-11-01 13:52:52 +00:00
Mike Smith
4c1a7a5a8f Make the BTX loader much more quiet about what it's doing. This removes 
most of the "what the (*^&%(*^ was that?" stuff that normally flies by.
 1998-10-30 00:11:35 +00:00
Mike Smith
f41c619d3d Pop the return address off the stack before making a V86_CALLF call; 
this allows us to implement what look like C function calls from user
space "directly" to v86 mode code.  (Used for calling the PnP BIOS)
 1998-10-22 20:22:07 +00:00
Robert Nordier
8f65b6a695 Don't use an absolute path to objcopy. 
Noticed by: Scott Mace <smace@intt.org>
 1998-10-13 18:29:18 +00:00
Robert Nordier
10806461a7 Override for ELF. Override .s.o suffix rule. 1998-10-11 11:27:48 +00:00
Robert Nordier
b7b32c2745 Fix for "get base memory" bug found and mostly fixed by Mike. 1998-10-06 07:15:35 +00:00
Mike Smith
024e2ede72 The BIOS memory size is only a word. Some BIOSsen have garbage in the other 
16 bits we were reading here, causing loss of arguments.
 1998-10-06 06:13:36 +00:00
Robert Nordier
731a4a01db Adjust setting of argument pointer for BTX 0.87. 1998-10-04 21:15:45 +00:00
Robert Nordier
18577050a0 Allocate space for storing of arguments at the end of conventional 
memory.
 1998-10-04 21:14:33 +00:00
Robert Nordier
3948b979ba For system calls, reboot without prompting; for exceptions, display 
message and await reset.
 1998-10-03 18:05:12 +00:00
Robert Nordier
9cd66506dd Map all BTX system pages readable at ring 3. 
This resolves the firmware problem first raised in connection
with PR 8105, although unrelated.
 1998-10-03 14:33:06 +00:00
Mike Smith
9d38269bae Fix an egregious precedence bug. 1998-10-02 20:52:26 +00:00
Mike Smith
39de38225b Mark exit() as __attribute__((__noreturn__)) 1998-10-02 16:22:54 +00:00
Peter Wemm
c7f3e669b7 Make these compile when there is an obj dir. 1998-09-25 17:14:16 +00:00
Mike Smith
948486abe3 Initial integration of the i386 bootloader and BTX. 
- Discard large amounts of BIOS-related code in favour of the more compact
   BTX vm86 interface.
 - Build the loader module as ELF, although the resulting object is a.out,
   make gensetdefs 32/64-bit sensitive and use a single copy of it.
 - Throw away installboot, as it's no longer required.
 - Use direct bcopy operations in the i386_copy module, as BTX
   maps the first 16M of memory.  Check operations against the
   detected size of actual memory.
 1998-09-17 23:52:16 +00:00
Robert Nordier
ec3009d3ec Add exec syscall. 1998-09-15 13:26:23 +00:00
Mike Smith
0d5d0b20dc Resynch with working sources before BTX integration. 
- Use format-independant module allocator.
 - Conditionalise ISA PnP support.
 - Simplify PnP enumerator interface.
 - Improve module/object searching.
 - Add missing depend/install targets in BTX makefiles.
 - Pass the kernel environment and module data in extended bootinfo fields.
 - Add a pointer to the end of the kernel + modules in bootinfo.
 - Fix parsing of old-style kernel arguments.
 1998-09-14 18:27:06 +00:00
Robert Nordier
4cbf0238eb Add BTX startup/interface code. 1998-09-14 10:37:00 +00:00
Robert Nordier
38c931abc7 Enable client entry point support. 1998-09-13 13:28:07 +00:00
Robert Nordier
b0923a2edc Add btxldr, a BTX loader for ELF clients. 1998-09-12 06:30:26 +00:00
Robert Nordier
aa7af79537 BTX (aka the boot extender) is an i386 kernel that hosts 32-bit 
bootstrap programs, and provides page-level protection, hardware
interrupt reflection, a virtual-8086 mode interface to BIOS, etc.
 1998-09-12 04:29:23 +00:00