Commit Graph

16 Commits

Author SHA1 Message Date
Warner Losh
b3a2aad11e Minor cosmetic changes.
Make sure { on the same line as struct for all struct *devdesc.  Move
some type definitions to next to the dv_type define, since that's what
sets the d_type.
2018-03-12 21:39:27 +00:00
Nathan Whitehorn
e05bc4f98f Move "common" Open Firmware parts of the loader used only on PowerPC to
the powerpc/ subdirectory. These have never used by SPARC and we have
no other (and almost certainly will have no other) Open Firmware platforms.
This makes the directory structure simpler and lets us avoid some
cargo-cult MI patterns on code that is, and always was,
architecture-specific.
2018-03-03 23:39:07 +00:00
Nathan Whitehorn
861a0b4808 Fix regression introduced in r328806, preventing boot at least on all
PowerPC Apple hardware, and likely all Open Firmware systems.

The loader would allocate memory for its heap at whatever address Open
Firmware gave it, which would in general be the lowest unallocated address,
usually starting a page or two above 0. As the kernel is linked at 1 MB,
and loader insists on running the kernel at its link address, any heap
larger than 1 MB would overlap the kernel, causing loader memory allocations
to corrupt the kernel and vice versa.

Although r328806 made this problem much worse by increasing the heap size
to 8 MB, causing 88% of the loader heap to overlap with the kernel, the
problem has always existed. The old heap size was 1 MB and, unless that
started exactly at zero, which would cause other problems, some number of
pages of the loader heap still overlapped with the kernel.

This patch solves the issue in two ways and cleans up some related code:
- Moves the loader heap inside of the loader. This guarantees that the
  heap will be contiguous with the loader and simplifies the heap
  allocation code at no cost, since the heap lives in BSS.
- Moves the loader, previously at 28 MB and dangerously close to the kernel
  it loads, a bit higher to 44 MB. This has the effect of breaking loader
  on non-embedded PPC machines with < 48 MB of RAM, but we did not support
  those anyway.

The fundamental problem is that the way loader loads ELF files is
incredibly fragile, but that can't be fixed without fundamental
architectural changes.

MFC after:	10 days
2018-02-03 23:49:21 +00:00
Warner Losh
e240d1cfeb We need more heap space to properly load newer powerpc kernels.
PR: 225323
2018-02-02 19:42:02 +00:00
Warner Losh
8299b37f85 Centralize several variables.
MK_CTF, MK_SSP, MK_PROFILE, NO_PIC, and INTERNALLIB are always the
same, so set them in defs.mk. MAN= is common, so set it here too.
This removes a lot of boring repetition from the Makefiles that added
almost no value.
2018-02-02 06:32:26 +00:00
Warner Losh
6bc860372d Interact is always called with NULL. Simplify code a little by
removing this argument, and expanding when rc is NULL. This
effectively completes the back out of custom scripts for tftp booted
loaders from r269153 that was started in r292344 with the new path
tricks that obsoleted it.

Submitted by: Netflix
2017-12-19 04:05:55 +00:00
Warner Losh
ba25195ebf Revert r326792, r326784, r326772, r326712
Something subtle is creating problems for disk access on ubldr. Back
it out unti that can be sorted out.

Sponsored by: Netflix
2017-12-12 22:06:22 +00:00
Warner Losh
c83457486b Fix regression with lua import
Don't print when we can't find a file. Copy it instead to the error
buffer. Higher level routines determine if it's appropriate to print
the error message.

Also, remove dead code (labeled bogusly lost functionality) since we
never used that functionality. Remove unused arg from interact() too.

Sponsored by: Netflix
2017-12-11 16:18:05 +00:00
Warner Losh
0a34fc542c e_entry can be smaller than a pointer. Cast it to an intptr_t before
casting it to a uint64_t *.
2017-12-03 04:55:04 +00:00
Warner Losh
2d35a371fc Cast mdp (a vm_offset_t) to void * to match prototype.
Sponsored by: Netflix
2017-12-03 04:54:59 +00:00
Warner Losh
a76b2d3d57 Include machine/md_var to pick up __syncicache prototype.
Sponsored by: Netflix
2017-12-03 04:54:54 +00:00
Warner Losh
7287ae743c Delcare md_load in libofw.h. Make all prototypes match for ofw
provided md_load functions.

Sponsored by: Netflix
2017-12-03 04:54:49 +00:00
Warner Losh
6df214c520 Const poison the propname. It's never set and we often pass it const
char *.

Sponsored by: Netflix
2017-12-03 04:54:18 +00:00
Nathan Whitehorn
28b2cf37b9 Modify all FreeBSD bootloaders on PowerPC AIM (Book-S) systems to pass a
magic number to the kernel in r7 rather than the (currently unused and
irrelevant) width of the metadata pointer, which I believe was intended
for a never-used approach to the 64-bit port. This enables the kernel,
in a future commit, to switch on the cookie to distinguish a real
metadata pointer from loader(8) from garbage left in r6 by some other
boot loader.

MFC after:	3 weeks
2017-11-24 23:41:04 +00:00
Warner Losh
8a4217aacf Move some more common stuff up to Makefile.inc. In particular, the no
simd / no float stuff is centeralized here. Also centralise
-ffreestanding since it is specified everywhere.

This, along with a change to share/mk/bsd.cpu.mk to include -mno-avx2
in CFLAGS_NO_SIMD should fix building for newer machines (eg with
CPUTYPE=haswell) where clang was generating avx2 instructions.

Sponsored by: Netflix
2017-11-20 22:42:17 +00:00
Warner Losh
ca987d4641 Move sys/boot to stand. Fix all references to new location
Sponsored by:	Netflix
2017-11-14 23:02:19 +00:00