robin.thoni/ipxe - git rthoni.com

Commit graph

Autor	SHA1	Nachricht	Datum
Michael Brown	a9369bb503	Leave protected-mode return address on PM stack when issuing a 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().	vor 18 Jahren
Michael Brown	290c5ee779	Don't automatically call gateA20_set() when returning from a real-mode call.	vor 18 Jahren
Michael Brown	6abfaa153b	Towards making KEEP_IT_REAL work again. Fix bug that caused over-allocation of .text16 and .data16 memory areas by a factor of 16.	vor 18 Jahren
Michael Brown	35b04b1514	Tidy up comment	vor 18 Jahren
Michael Brown	041a04335e	Fixed assembly on old versions of gas	vor 18 Jahren
Michael Brown	29340d7728	Documented the fact that the prefix can prot_call(main) without worrying about its stack being destroyed during the Etherboot run.	vor 18 Jahren
Michael Brown	89da833c5d	init_librm() and prot_call() are now real-mode far calls. install() now calls relocate(), moves the protected-mode code to the new location, and calls hide_etherboot().	vor 18 Jahren
Michael Brown	02cf755f3f	Removed REAL_EXEC(); there is no longer any code using it.	vor 18 Jahren
Michael Brown	83d80d9e79	Remove references to obsoleted REAL_CALL from documentation.	vor 18 Jahren
Michael Brown	5080668704	Provide access to rm_cs and rm_ds from protected-mode code.	vor 18 Jahren
Michael Brown	f7b963da51	(Redoing check-in lost by SourceForge's failure.) Use .text16.data section with "aw" attributes, to avoid section type conflicts when placing both code and data into .text16. Add __from_{text16,data16}.	vor 18 Jahren
Michael Brown	fdb983d473	Preserve the whole of %esp across prot_call(). We have to split this 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.	vor 18 Jahren
Michael Brown	c10d1aa9d7	Preserve GDT across prot_call().	vor 18 Jahren
Michael Brown	dcc1b0054e	This line should not have been checked in	vor 18 Jahren
Michael Brown	832807726a	Add infrastructure to support access to .data16 (and .text16) variables 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.	vor 18 Jahren
Michael Brown	10c28a51bd	Create two easy-to-use entry points in libprefix: install and install_prealloc. I think these will suffice for all the 16-bit prefixes.	vor 18 Jahren
Michael Brown	9fcded3d23	Towards a(nother) new real-mode infrastructure, in which we take advantage of the fact that we have to have a permanently-resident block in base memory.	vor 18 Jahren
Michael Brown	352bf1bda2	Move init.h to gpxe/init.h.	vor 18 Jahren
Michael Brown	4c4e4de18f	(librm_base-1b) is already an offset; no need to apply OFFSET(). Doing so, in fact, seems to expose an assembler bug; (a-b-0) is apparently not the same as (a-b). Go figure.	vor 18 Jahren
Michael Brown	d3dec7c331	Update to cope with changes in registers.h	vor 19 Jahren
Michael Brown	378c1b500c	Cleaner separation of functionality between post_reloc and initialise_via_librm.	vor 19 Jahren
Michael Brown	34a0b5f16f	initialise() doesn't take regs	vor 19 Jahren
Michael Brown	87508aa0b2	arch_initialise() is now sufficiently generic that we may as well just call it initialise() and place it in main.c. :)	vor 19 Jahren
Michael Brown	560027899e	Heading towards a sane set of control functions	vor 19 Jahren
Michael Brown	04a99841e6	Make prot_call() able to transparently return via the newly installed copy of librm.	vor 19 Jahren
Michael Brown	2fa14f2f1d	lgdt needs data32 prefix, otherwise it loads only 24 bits. (sgdt always saves 32 bits).	vor 19 Jahren
Michael Brown	6a4ac358f3	Add INIT_FNs to make sure that librm gets reallocated when needed.	vor 19 Jahren
Michael Brown	1f6dfd7047	Allow ourselves to be freed by basemem.c without being damaged.	vor 19 Jahren
Michael Brown	a800e9657d	PM function called by prot_call() should be allowed to modifying registers returned to RM code.	vor 19 Jahren
Michael Brown	0ff80b477d	Merged mcb30-realmode-redesign back to HEAD	vor 19 Jahren

30 Commits (d12770e254551737659cbbb777beccde7d2363a9)