summaryrefslogtreecommitdiffstats
path: root/src/arch/i386/transitions
Commit message (Collapse)AuthorAgeFilesLines
* Fix compiler warnings that appear only on OpenBSD.Michael Brown2007-12-061-1/+1
|
* Switch rm_ss and rm_sp back to being words; it'll make it lessMichael Brown2007-09-251-7/+7
| | | | confusing to read the code.
* Don't use the "rep ss movsb" trick to copy the RM stack to the PMMichael Brown2007-09-251-31/+34
| | | | stack; it breaks vmxassist.
* rm_ss, rm_sp, and pm_esp don't need to be accessed from anywhereMichael Brown2007-09-252-51/+0Star
| | | | outside of librm.S.
* Real-mode code might set the direction flag, which would cause carnage.Michael Brown2007-07-171-0/+3
|
* Leave protected-mode return address on PM stack when issuing aMichael Brown2007-01-091-11/+10Star
| | | | | | real_call(), rather than moving it to the RM stack and back again. This allows the real-mode function to completely destroy the stack contents, provided that it manages to return to real_call().
* Don't automatically call gateA20_set() when returning from a real-modeMichael Brown2007-01-041-5/+7
| | | | call.
* Towards making KEEP_IT_REAL work again.Michael Brown2006-08-241-15/+26
| | | | | Fix bug that caused over-allocation of .text16 and .data16 memory areas by a factor of 16.
* Tidy up commentMichael Brown2006-05-281-4/+5
|
* Fixed assembly on old versions of gasMichael Brown2006-05-281-3/+3
|
* Documented the fact that the prefix can prot_call(main) withoutMichael Brown2006-05-261-0/+9
| | | | worrying about its stack being destroyed during the Etherboot run.
* init_librm() and prot_call() are now real-mode far calls.Michael Brown2006-05-251-4/+4
| | | | | install() now calls relocate(), moves the protected-mode code to the new location, and calls hide_etherboot().
* Removed REAL_EXEC(); there is no longer any code using it.Michael Brown2006-05-241-1/+1
|
* Remove references to obsoleted REAL_CALL from documentation.Michael Brown2006-05-241-3/+2Star
|
* Provide access to rm_cs and rm_ds from protected-mode code.Michael Brown2006-05-131-0/+2
|
* (Redoing check-in lost by SourceForge's failure.)Michael Brown2006-05-131-3/+5
| | | | | | | Use .text16.data section with "aw" attributes, to avoid section type conflicts when placing both code and data into .text16. Add __from_{text16,data16}.
* Preserve the whole of %esp across prot_call(). We have to split thisMichael Brown2006-05-061-7/+14
| | | | | | | | | | | | | between the low half stored in the static variable rm_sp, and the high half stored on the prot_call() stack, because: Just using the stack would screw up when a prot_call()ed routine executes a real_call(); it would have no way to find the current top of the RM stack. Extending rm_sp to rm_esp would not be safe, because the guarantee that rm_sp must return to the correct value by the time an external real-mode call returns applies only to %sp, not to %esp.
* Preserve GDT across prot_call().Michael Brown2006-05-061-6/+12
|
* This line should not have been checked inMichael Brown2006-05-051-1/+0Star
|
* Add infrastructure to support access to .data16 (and .text16) variablesMichael Brown2006-05-051-74/+122
| | | | | | | | | from protected-mode code. Set up %ds to point to .data16 in prot_to_real, so that code specified via REAL_EXEC() and friends can access variables in .data16. Move most real-mode librm variables from .text16 to .data16.
* Create two easy-to-use entry points in libprefix: install andMichael Brown2006-05-021-1/+1
| | | | | install_prealloc. I *think* these will suffice for all the 16-bit prefixes.
* Towards a(nother) new real-mode infrastructure, in which we takeMichael Brown2006-05-022-694/+291Star
| | | | | advantage of the fact that we have to have a permanently-resident block in base memory.
* Move init.h to gpxe/init.h.Michael Brown2006-04-301-1/+1
|
* (librm_base-1b) is already an offset; no need to apply OFFSET().Michael Brown2006-04-241-1/+1
| | | | | Doing so, in fact, seems to expose an assembler bug; (a-b-0) is apparently not the same as (a-b). Go figure.
* Update to cope with changes in registers.hMichael Brown2005-05-203-24/+24
|
* Cleaner separation of functionality between post_reloc andMichael Brown2005-04-111-14/+8Star
| | | | initialise_via_librm.
* initialise() doesn't take regsMichael Brown2005-04-101-2/+2
|
* arch_initialise() is now sufficiently generic that we may as well justMichael Brown2005-04-101-3/+3
| | | | call it initialise() and place it in main.c. :)
* Heading towards a sane set of control functionsMichael Brown2005-04-101-27/+39
|
* Make prot_call() able to transparently return via the newly installed copyMichael Brown2005-04-102-33/+73
| | | | of librm.
* lgdt needs data32 prefix, otherwise it loads only 24 bits. (sgdtMichael Brown2005-04-091-1/+1
| | | | always saves 32 bits).
* Add INIT_FNs to make sure that librm gets reallocated when needed.Michael Brown2005-04-091-29/+109
|
* Allow ourselves to be freed by basemem.c without being damaged.Michael Brown2005-04-091-0/+16
|
* PM function called by prot_call() should be allowed to modifyingMichael Brown2005-04-091-2/+15
| | | | registers returned to RM code.
* Merged mcb30-realmode-redesign back to HEADMichael Brown2005-04-084-0/+1021
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-02-27 12:30:40 +0100