Notes:
- I added bsd.obj.mk and made it work with objdirs.
- I added an entry point to the linker to fix a warning.
- I made the backup of biostramp.inc silent.
- I added missing clean targets.
This needs to be tested further.
to be the logarithm to base 2 of the alignment, in an ELF environment n is
the actual alignment boundary; thus, adjust the directives accordingly.
Albeit the wonderful i386 architecture doesn't mind the smaller alignment in
an obvious way, it is likely to have resulted in some performance penalty
during the a.out->ELF transition.
calling interface (via a grapple in locore.s) is:
/*
* void bioscall(int function, struct apmregs *regs):
* call the BIOS interrupt "function" from real mode with
* registers as specified in "regs"
* (for the flags, though, only these flags are passed to the BIOS;
* the remainder come from the flags register at the time of the call:
* (PSL_C|PSL_PF|PSL_AF|PSL_Z|PSL_N|PSL_D|PSL_V)
*
* Fills in *regs with registers as returned by BIOS.
*/
still some generalization to do (moving this to a better named location,
cleaning up #if tests from NAPM > 0 to something else to allow easy
sharing by other drivers)
Thanks to Charles Hannum for complaining about the previous BIOS grapple
and inspiring me to hack this one together.
