i386: stand: Tiny clean up for `start_pxeboot.o`, NFC

i386: stand: Adjust for DOS-routine migration

i386: stand: Drop `*.rom` support; only used for netboot

i386: stand: Retire its own nfs.c, and switch to libsa/nfs.c. NFC

i386: stand: G/C `genprom`; used only by netboot

bsd.own.mk: rename to CC_WNO_ADDRESS_OF_PACKED_MEMBER

Provide a single variable
CC_WNO_ADDRESS_OF_PACKED_MEMBER
with options for both clang and gcc, to replace
CLANG_NO_ADDR_OF_PACKED_MEMBER
CC_NO_ADDR_OF_PACKED_MEMBER
GCC_NO_ADDR_OF_PACKED_MEMBER

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

Fix the clang build by setting -z noseparate-code

branches: 1.94.20;
add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Specify NOLIBCSANITIZER in x86 bootloader-like code under sys/arch/

Set NOLIBCSANITIZER for i386 and amd64 specific bootloader-like code.

branches: 1.92.2;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.91.12;
centralize vers.c building for standalone programs.

branches: 1.90.2; 1.90.4;
Compile the bootblocks for i386 CPUs, even when the main target architecture
is amd64.
Fixes PR port-i386/49725.

branches: 1.89.4; 1.89.6;
Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

Set KLINK_MACHINE

Use <bsd.klinks.mk>

branches: 1.86.2; 1.86.4;
Don't depend on HAVE_GCC being always present.

branches: 1.85.2;
remove all the code that supported HAVE_GCC=3. mostly from chuq.

Refactor compiler-specific optimizer flags. Mark bootxx as supported
with clang.

branches: 1.83.2;
Do not ignore errors from genprom.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.81.2; 1.81.4;
It just so happens we don't need -Wno-attributes if we
place __packed in the right place.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.78.2; 1.78.4;
Remove extra trailing slash in ${S} path.

branches: 1.77.2;
Use ${VERSIONFILE} instead of ${.ALLSRC} to match Makefile.boot.

This change stops the full path of newvers_stand.sh from showing up in
pxeboot_ia32.bin.

branches: 1.76.2; 1.76.4;
Wrap compiler-specific flags with HAVE_GCC and HAVE_PCC as necessary. Add a few flags for PCC.

Call newvers_stand.sh with -DM so we don't include the (unused) date
and builder in the data segment.

make vers.c also depend on the script that builds vers.c

branches: 1.73.16; 1.73.20; 1.73.22; 1.73.24; 1.73.26;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Remove -DBOOT_ELF64 to make build on amd64.

- Make i386 bootblocks boot amd64 kernels, and change to say "NetBSD/x86..."
- Don't bother booting a.out kernels any more.

branches: 1.70.14; 1.70.22; 1.70.32; 1.70.34; 1.70.36;
revert the previous because it doesn't work without destdir populated.
pointed by Valeriy E. Ushakov.

-I${S}/../common/include for libprop.

Convert to using CC instead of LD, as LDFLAGS is for CC not LD.

whitespace consistency

branches: 1.66.2;
Add -Wno-attributes for amd64, too.

branches: 1.65.2;
When creating BASE.rom, don't use BASE.bin as a temporary filename,
since the latter is a valid target name.

support MAKEVERBOSE

- -mcpu=i386 is gone in GCC4
- we need -Wno-attributes (to avoid __packed__ warnings)
- use -Wno-pointer-sign
- remove some redundancy from pxeboot/Makefile

branches: 1.62.4; 1.62.6; 1.62.8; 1.62.12;
merge ktrace-lwp.

use a .BEGIN target to make the various symlinks,
the previous way had problems with parallel make.

branches: 1.60.2;
add dependall and realdepend to the targets that we need to call in the
beginning. XXX: The real fix (handle dependencies in .BEGIN) is forthcoming.

PR/9567: Arne H. Juul: .BEGIN targets should not use dependencies.

branches: 1.58.10;
Use CPUFLAGS for codegen options.

Ignore errors on some rm -rf's for platforms that aren't quite
POSIX compliant
and return errors on r/o source (FreeBSD) for -rf. Fixes PR#25022

branches: 1.56.2;
stand/lib/crt/rom is no more, no need for it in .PATH

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

Need to explicitly create directory behing symlink.
Clean share lib directory.

Only build the libraries once,

BSSTART was only used for the (now depracated) old stand/biosboot code.

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.

As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).

amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.

* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.

* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.

* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.

* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.

installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)

mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

branches: 1.50.2;
Use ${MACHINE} when generating the version string, not plain 'i386'.

be consistent with other Makefiles here and invoke "rm -f" separately to ln -s

replace "ln -sf .... $@" with "rm -f $@ && ln -s .... $@"
since the latter works correctly ...

Clean up machine include dir handling a tad.

Remove definition of LIBSA_SUPPORT_UFS2, the source will only build separate
ufsv1 and ufsv2 objects (the merged one was too large for the code that only
supported a single fs type).

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

create a symlink so that eg <x86/trap.h> is found

Revert my last change. While it actually allows a build to finish,
an iso-image created from the resulting release won't boot. I don't
know if this change is the source of that, but one more knowledgable
than I about the x86 booter needs to look at this, and I don't want
the waters muddied any more than necessary.

Add CPPFLAGS+= -D__daddr_t=int32_t.

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed by mbr code to select default partition
(the mbr code doesn't do this yet).
NB only biosboot and dosboot have been tested so far.
(changes approved by christos and fvdl)

Make the ld workaround work on x88_64, and add the temporary ld script
to CLEANFILES.

Remove the 4k between code and data to increase the stack space.
Support for 64bit disk blocks seems to have exploded the code.

Stub out LIBCRT0, LIBCRTBEGIN, LIBCRTEND, and LIBC.

Some hacks to make this compile on x86_64.

make vers.c depend on ${SOURCES} and remove .PHONY tag for it, so that it
would only be regenerated if any of the input files changed

branches: 1.35.2;
Assign COPTS instead of adding to it, avoids situation where -mi386
is mixed with -march=something_incompatible

suggested by thorpej

Build with -ffreestanding.

branches: 1.33.6; 1.33.8;
Make sure we override any optimization options specified by the
user; the boot blocks don't work when built with e.g. -mcpu=i486
(probably due to how branches are aligned in that case, causing
segment boundaries to be crossed).

Cleanup of i386 bootloader building:
* Add separate directories for the individual netboot ROMs and
always build them.
* Each bootloader Makefile explicitly specifies the start file
and link address it wishes to use.
* genprom becomes a proper host program.
* Make sure all generated files get cleaned up.
* Set BINDIR in Makefile.inc
* Add compressed image support to pxeboot.
* Make pxeboot use the default serial console speed (9600).

Add a PXE boot loader. PXE interface code is derived by code
written by Alfred Perlstein, Paul Saab, John Baldwin for FreeBSD.

Still needs some work, but this will load a kernel on a Soekris net4501.

Many thanks to Frank van der Linden and his simulator wizardry for
helping me debug the low-level startup code.

Don't make the symlinks on clean rules as well as obj rules. Breaks r/o source
trees that haven't gotten to the make obj recursion part of make build
otherwise.

GCC 2.95 generates significantly larger code with -O2 than our old compiler did; this can cause the second-stage bootblock to exceed the number of blocks that fit in the list in the first-stage bootblock. I thought we used to explicitly set -Os in here; anyway, with this change, we do now!

objcopy -> ${OBJCOPY}; remove redundant definitions of OBJCOPY?= (it is
now in bsd.own.mk).

branches: 1.27.4;
Include bsd.own.mk a bit earlier so that make cleandir works.

branches: 1.26.4; 1.26.6;
switch to MI newvers_stand.sh version info generator

Fix the symlink hack.

branches: 1.24.2;
fix creation of DOS / ROM images from ELF executables: use "objcopy"

make sure the ./machine link is created early enough for specific targets,
fixes PR port-i386/7553 by David Rankin <drankin@bohemians.lexington.ky.us>

Use new loadfile.c

branches: 1.21.4;
Hack to make biosboot_ser work.

XXX The makefile structure in src/sys/arch/i386/stand is very bad.

$(OBJS) -> ${OBJS}

Also build serial bootblocks by default, installing into
/usr/mdec/biosboot_ser.sym
Change Makefile.booters to not assume `version' file is in source directory.

Remove "lib" directory only during "make cleandir" so that ".depend"
doesn't get nuked during "make clean".

Remove "lib" directory created during build process while doing
"make clean" or "make cleandir".

Remove exec.o, and make necessary changes for elf.

Both booters need exec.o now.

add dependency to get the version number right

add -nostdinc to CPPFLAGS, so that /usr/include won't be used

Nuke the override of libkern SRCS from orbit.

strchr.c disappeared from libkern, use index.c instead
(we can't control the libkern build as we want, but it works...)

Prevent error if machine-symlink isn't already there (rm -> rm -f)

Use the "proginstall" rule from <bsd.prog.mk> to get the UPDATE
behaviour right.

Make "genprom" work in objdir.
Minor cleanup to ease bootcode development at non-standard locations.
Closes PR port-i386/4013 by Luke Mewburn.

branches: 1.7.2;
New welcome banner code, modeled after NetBSD/hp300's boot program
welcome banner code. Includes additional build information, and it
generally nicer to look at.

Use include files from kernel source, not userland. Create a
"machine" link automatically for this.

Define _STANDALONE for standalone programs.

Allow to boot from DOS if a XMS manager is installed.
XMS is recognized and used as temporary buffer for the kernel image.
The processor must still be in real mode at program start, so EMM386
or QEMM are not allowed. W*95 is OK.
Written by Martin Husemann (pr port-i386/3336).
Completely separated from other bootloaders for sanity.

Force inclusion of "diskbuf" into bootsectors.
This allows to build bootsectors containing netboot code
("make netboot.sym" in the netboot directory).

STRIP -> STRIPFLAG

branches: 1.1.1;
Initial revision

bsd.own.mk: rename to CC_WNO_ADDRESS_OF_PACKED_MEMBER

Provide a single variable
CC_WNO_ADDRESS_OF_PACKED_MEMBER
with options for both clang and gcc, to replace
CLANG_NO_ADDR_OF_PACKED_MEMBER
CC_NO_ADDR_OF_PACKED_MEMBER
GCC_NO_ADDR_OF_PACKED_MEMBER

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

Fix the clang build by setting -z noseparate-code

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Specify NOLIBCSANITIZER in x86 bootloader-like code under sys/arch/

Set NOLIBCSANITIZER for i386 and amd64 specific bootloader-like code.

branches: 1.92.2;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.91.12;
centralize vers.c building for standalone programs.

branches: 1.90.2; 1.90.4;
Compile the bootblocks for i386 CPUs, even when the main target architecture
is amd64.
Fixes PR port-i386/49725.

branches: 1.89.4; 1.89.6;
Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

Set KLINK_MACHINE

Use <bsd.klinks.mk>

branches: 1.86.2; 1.86.4;
Don't depend on HAVE_GCC being always present.

branches: 1.85.2;
remove all the code that supported HAVE_GCC=3. mostly from chuq.

Refactor compiler-specific optimizer flags. Mark bootxx as supported
with clang.

branches: 1.83.2;
Do not ignore errors from genprom.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.81.2; 1.81.4;
It just so happens we don't need -Wno-attributes if we
place __packed in the right place.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.78.2; 1.78.4;
Remove extra trailing slash in ${S} path.

branches: 1.77.2;
Use ${VERSIONFILE} instead of ${.ALLSRC} to match Makefile.boot.

This change stops the full path of newvers_stand.sh from showing up in
pxeboot_ia32.bin.

branches: 1.76.2; 1.76.4;
Wrap compiler-specific flags with HAVE_GCC and HAVE_PCC as necessary. Add a few flags for PCC.

Call newvers_stand.sh with -DM so we don't include the (unused) date
and builder in the data segment.

make vers.c also depend on the script that builds vers.c

branches: 1.73.16; 1.73.20; 1.73.22; 1.73.24; 1.73.26;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Remove -DBOOT_ELF64 to make build on amd64.

- Make i386 bootblocks boot amd64 kernels, and change to say "NetBSD/x86..."
- Don't bother booting a.out kernels any more.

branches: 1.70.14; 1.70.22; 1.70.32; 1.70.34; 1.70.36;
revert the previous because it doesn't work without destdir populated.
pointed by Valeriy E. Ushakov.

-I${S}/../common/include for libprop.

Convert to using CC instead of LD, as LDFLAGS is for CC not LD.

whitespace consistency

branches: 1.66.2;
Add -Wno-attributes for amd64, too.

branches: 1.65.2;
When creating BASE.rom, don't use BASE.bin as a temporary filename,
since the latter is a valid target name.

support MAKEVERBOSE

- -mcpu=i386 is gone in GCC4
- we need -Wno-attributes (to avoid __packed__ warnings)
- use -Wno-pointer-sign
- remove some redundancy from pxeboot/Makefile

branches: 1.62.4; 1.62.6; 1.62.8; 1.62.12;
merge ktrace-lwp.

use a .BEGIN target to make the various symlinks,
the previous way had problems with parallel make.

branches: 1.60.2;
add dependall and realdepend to the targets that we need to call in the
beginning. XXX: The real fix (handle dependencies in .BEGIN) is forthcoming.

PR/9567: Arne H. Juul: .BEGIN targets should not use dependencies.

branches: 1.58.10;
Use CPUFLAGS for codegen options.

Ignore errors on some rm -rf's for platforms that aren't quite
POSIX compliant
and return errors on r/o source (FreeBSD) for -rf. Fixes PR#25022

branches: 1.56.2;
stand/lib/crt/rom is no more, no need for it in .PATH

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

Need to explicitly create directory behing symlink.
Clean share lib directory.

Only build the libraries once,

BSSTART was only used for the (now depracated) old stand/biosboot code.

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.

As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).

amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.

* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.

* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.

* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.

* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.

installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)

mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

branches: 1.50.2;
Use ${MACHINE} when generating the version string, not plain 'i386'.

be consistent with other Makefiles here and invoke "rm -f" separately to ln -s

replace "ln -sf .... $@" with "rm -f $@ && ln -s .... $@"
since the latter works correctly ...

Clean up machine include dir handling a tad.

Remove definition of LIBSA_SUPPORT_UFS2, the source will only build separate
ufsv1 and ufsv2 objects (the merged one was too large for the code that only
supported a single fs type).

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

create a symlink so that eg <x86/trap.h> is found

Revert my last change. While it actually allows a build to finish,
an iso-image created from the resulting release won't boot. I don't
know if this change is the source of that, but one more knowledgable
than I about the x86 booter needs to look at this, and I don't want
the waters muddied any more than necessary.

Add CPPFLAGS+= -D__daddr_t=int32_t.

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed by mbr code to select default partition
(the mbr code doesn't do this yet).
NB only biosboot and dosboot have been tested so far.
(changes approved by christos and fvdl)

Make the ld workaround work on x88_64, and add the temporary ld script
to CLEANFILES.

Remove the 4k between code and data to increase the stack space.
Support for 64bit disk blocks seems to have exploded the code.

Stub out LIBCRT0, LIBCRTBEGIN, LIBCRTEND, and LIBC.

Some hacks to make this compile on x86_64.

make vers.c depend on ${SOURCES} and remove .PHONY tag for it, so that it
would only be regenerated if any of the input files changed

branches: 1.35.2;
Assign COPTS instead of adding to it, avoids situation where -mi386
is mixed with -march=something_incompatible

suggested by thorpej

Build with -ffreestanding.

branches: 1.33.6; 1.33.8;
Make sure we override any optimization options specified by the
user; the boot blocks don't work when built with e.g. -mcpu=i486
(probably due to how branches are aligned in that case, causing
segment boundaries to be crossed).

Cleanup of i386 bootloader building:
* Add separate directories for the individual netboot ROMs and
always build them.
* Each bootloader Makefile explicitly specifies the start file
and link address it wishes to use.
* genprom becomes a proper host program.
* Make sure all generated files get cleaned up.
* Set BINDIR in Makefile.inc
* Add compressed image support to pxeboot.
* Make pxeboot use the default serial console speed (9600).

Add a PXE boot loader. PXE interface code is derived by code
written by Alfred Perlstein, Paul Saab, John Baldwin for FreeBSD.

Still needs some work, but this will load a kernel on a Soekris net4501.

Many thanks to Frank van der Linden and his simulator wizardry for
helping me debug the low-level startup code.

Don't make the symlinks on clean rules as well as obj rules. Breaks r/o source
trees that haven't gotten to the make obj recursion part of make build
otherwise.

GCC 2.95 generates significantly larger code with -O2 than our old compiler did; this can cause the second-stage bootblock to exceed the number of blocks that fit in the list in the first-stage bootblock. I thought we used to explicitly set -Os in here; anyway, with this change, we do now!

objcopy -> ${OBJCOPY}; remove redundant definitions of OBJCOPY?= (it is
now in bsd.own.mk).

branches: 1.27.4;
Include bsd.own.mk a bit earlier so that make cleandir works.

branches: 1.26.4; 1.26.6;
switch to MI newvers_stand.sh version info generator

Fix the symlink hack.

branches: 1.24.2;
fix creation of DOS / ROM images from ELF executables: use "objcopy"

make sure the ./machine link is created early enough for specific targets,
fixes PR port-i386/7553 by David Rankin <drankin@bohemians.lexington.ky.us>

Use new loadfile.c

branches: 1.21.4;
Hack to make biosboot_ser work.

XXX The makefile structure in src/sys/arch/i386/stand is very bad.

$(OBJS) -> ${OBJS}

Also build serial bootblocks by default, installing into
/usr/mdec/biosboot_ser.sym
Change Makefile.booters to not assume `version' file is in source directory.

Remove "lib" directory only during "make cleandir" so that ".depend"
doesn't get nuked during "make clean".

Remove "lib" directory created during build process while doing
"make clean" or "make cleandir".

Remove exec.o, and make necessary changes for elf.

Both booters need exec.o now.

add dependency to get the version number right

add -nostdinc to CPPFLAGS, so that /usr/include won't be used

Nuke the override of libkern SRCS from orbit.

strchr.c disappeared from libkern, use index.c instead
(we can't control the libkern build as we want, but it works...)

Prevent error if machine-symlink isn't already there (rm -> rm -f)

Use the "proginstall" rule from <bsd.prog.mk> to get the UPDATE
behaviour right.

Make "genprom" work in objdir.
Minor cleanup to ease bootcode development at non-standard locations.
Closes PR port-i386/4013 by Luke Mewburn.

branches: 1.7.2;
New welcome banner code, modeled after NetBSD/hp300's boot program
welcome banner code. Includes additional build information, and it
generally nicer to look at.

Use include files from kernel source, not userland. Create a
"machine" link automatically for this.

Define _STANDALONE for standalone programs.

Allow to boot from DOS if a XMS manager is installed.
XMS is recognized and used as temporary buffer for the kernel image.
The processor must still be in real mode at program start, so EMM386
or QEMM are not allowed. W*95 is OK.
Written by Martin Husemann (pr port-i386/3336).
Completely separated from other bootloaders for sanity.

Force inclusion of "diskbuf" into bootsectors.
This allows to build bootsectors containing netboot code
("make netboot.sym" in the netboot directory).

STRIP -> STRIPFLAG

branches: 1.1.1;
Initial revision

Fix the clang build by setting -z noseparate-code

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Specify NOLIBCSANITIZER in x86 bootloader-like code under sys/arch/

Set NOLIBCSANITIZER for i386 and amd64 specific bootloader-like code.

branches: 1.92.2;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.91.12;
centralize vers.c building for standalone programs.

branches: 1.90.2; 1.90.4;
Compile the bootblocks for i386 CPUs, even when the main target architecture
is amd64.
Fixes PR port-i386/49725.

branches: 1.89.4; 1.89.6;
Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

Set KLINK_MACHINE

Use <bsd.klinks.mk>

branches: 1.86.2; 1.86.4;
Don't depend on HAVE_GCC being always present.

branches: 1.85.2;
remove all the code that supported HAVE_GCC=3. mostly from chuq.

Refactor compiler-specific optimizer flags. Mark bootxx as supported
with clang.

branches: 1.83.2;
Do not ignore errors from genprom.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.81.2; 1.81.4;
It just so happens we don't need -Wno-attributes if we
place __packed in the right place.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.78.2; 1.78.4;
Remove extra trailing slash in ${S} path.

branches: 1.77.2;
Use ${VERSIONFILE} instead of ${.ALLSRC} to match Makefile.boot.

This change stops the full path of newvers_stand.sh from showing up in
pxeboot_ia32.bin.

branches: 1.76.2; 1.76.4;
Wrap compiler-specific flags with HAVE_GCC and HAVE_PCC as necessary. Add a few flags for PCC.

Call newvers_stand.sh with -DM so we don't include the (unused) date
and builder in the data segment.

make vers.c also depend on the script that builds vers.c

branches: 1.73.16; 1.73.20; 1.73.22; 1.73.24; 1.73.26;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Remove -DBOOT_ELF64 to make build on amd64.

- Make i386 bootblocks boot amd64 kernels, and change to say "NetBSD/x86..."
- Don't bother booting a.out kernels any more.

branches: 1.70.14; 1.70.22; 1.70.32; 1.70.34; 1.70.36;
revert the previous because it doesn't work without destdir populated.
pointed by Valeriy E. Ushakov.

-I${S}/../common/include for libprop.

Convert to using CC instead of LD, as LDFLAGS is for CC not LD.

whitespace consistency

branches: 1.66.2;
Add -Wno-attributes for amd64, too.

branches: 1.65.2;
When creating BASE.rom, don't use BASE.bin as a temporary filename,
since the latter is a valid target name.

support MAKEVERBOSE

- -mcpu=i386 is gone in GCC4
- we need -Wno-attributes (to avoid __packed__ warnings)
- use -Wno-pointer-sign
- remove some redundancy from pxeboot/Makefile

branches: 1.62.4; 1.62.6; 1.62.8; 1.62.12;
merge ktrace-lwp.

use a .BEGIN target to make the various symlinks,
the previous way had problems with parallel make.

branches: 1.60.2;
add dependall and realdepend to the targets that we need to call in the
beginning. XXX: The real fix (handle dependencies in .BEGIN) is forthcoming.

PR/9567: Arne H. Juul: .BEGIN targets should not use dependencies.

branches: 1.58.10;
Use CPUFLAGS for codegen options.

Ignore errors on some rm -rf's for platforms that aren't quite
POSIX compliant
and return errors on r/o source (FreeBSD) for -rf. Fixes PR#25022

branches: 1.56.2;
stand/lib/crt/rom is no more, no need for it in .PATH

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

Need to explicitly create directory behing symlink.
Clean share lib directory.

Only build the libraries once,

BSSTART was only used for the (now depracated) old stand/biosboot code.

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.

As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).

amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.

* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.

* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.

* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.

* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.

installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)

mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

branches: 1.50.2;
Use ${MACHINE} when generating the version string, not plain 'i386'.

be consistent with other Makefiles here and invoke "rm -f" separately to ln -s

replace "ln -sf .... $@" with "rm -f $@ && ln -s .... $@"
since the latter works correctly ...

Clean up machine include dir handling a tad.

Remove definition of LIBSA_SUPPORT_UFS2, the source will only build separate
ufsv1 and ufsv2 objects (the merged one was too large for the code that only
supported a single fs type).

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

create a symlink so that eg <x86/trap.h> is found

Revert my last change. While it actually allows a build to finish,
an iso-image created from the resulting release won't boot. I don't
know if this change is the source of that, but one more knowledgable
than I about the x86 booter needs to look at this, and I don't want
the waters muddied any more than necessary.

Add CPPFLAGS+= -D__daddr_t=int32_t.

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed by mbr code to select default partition
(the mbr code doesn't do this yet).
NB only biosboot and dosboot have been tested so far.
(changes approved by christos and fvdl)

Make the ld workaround work on x88_64, and add the temporary ld script
to CLEANFILES.

Remove the 4k between code and data to increase the stack space.
Support for 64bit disk blocks seems to have exploded the code.

Stub out LIBCRT0, LIBCRTBEGIN, LIBCRTEND, and LIBC.

Some hacks to make this compile on x86_64.

make vers.c depend on ${SOURCES} and remove .PHONY tag for it, so that it
would only be regenerated if any of the input files changed

branches: 1.35.2;
Assign COPTS instead of adding to it, avoids situation where -mi386
is mixed with -march=something_incompatible

suggested by thorpej

Build with -ffreestanding.

branches: 1.33.6; 1.33.8;
Make sure we override any optimization options specified by the
user; the boot blocks don't work when built with e.g. -mcpu=i486
(probably due to how branches are aligned in that case, causing
segment boundaries to be crossed).

Cleanup of i386 bootloader building:
* Add separate directories for the individual netboot ROMs and
always build them.
* Each bootloader Makefile explicitly specifies the start file
and link address it wishes to use.
* genprom becomes a proper host program.
* Make sure all generated files get cleaned up.
* Set BINDIR in Makefile.inc
* Add compressed image support to pxeboot.
* Make pxeboot use the default serial console speed (9600).

Add a PXE boot loader. PXE interface code is derived by code
written by Alfred Perlstein, Paul Saab, John Baldwin for FreeBSD.

Still needs some work, but this will load a kernel on a Soekris net4501.

Many thanks to Frank van der Linden and his simulator wizardry for
helping me debug the low-level startup code.

Don't make the symlinks on clean rules as well as obj rules. Breaks r/o source
trees that haven't gotten to the make obj recursion part of make build
otherwise.

GCC 2.95 generates significantly larger code with -O2 than our old compiler did; this can cause the second-stage bootblock to exceed the number of blocks that fit in the list in the first-stage bootblock. I thought we used to explicitly set -Os in here; anyway, with this change, we do now!

objcopy -> ${OBJCOPY}; remove redundant definitions of OBJCOPY?= (it is
now in bsd.own.mk).

branches: 1.27.4;
Include bsd.own.mk a bit earlier so that make cleandir works.

branches: 1.26.4; 1.26.6;
switch to MI newvers_stand.sh version info generator

Fix the symlink hack.

branches: 1.24.2;
fix creation of DOS / ROM images from ELF executables: use "objcopy"

make sure the ./machine link is created early enough for specific targets,
fixes PR port-i386/7553 by David Rankin <drankin@bohemians.lexington.ky.us>

Use new loadfile.c

branches: 1.21.4;
Hack to make biosboot_ser work.

XXX The makefile structure in src/sys/arch/i386/stand is very bad.

$(OBJS) -> ${OBJS}

Also build serial bootblocks by default, installing into
/usr/mdec/biosboot_ser.sym
Change Makefile.booters to not assume `version' file is in source directory.

Remove "lib" directory only during "make cleandir" so that ".depend"
doesn't get nuked during "make clean".

Remove "lib" directory created during build process while doing
"make clean" or "make cleandir".

Remove exec.o, and make necessary changes for elf.

Both booters need exec.o now.

add dependency to get the version number right

add -nostdinc to CPPFLAGS, so that /usr/include won't be used

Nuke the override of libkern SRCS from orbit.

strchr.c disappeared from libkern, use index.c instead
(we can't control the libkern build as we want, but it works...)

Prevent error if machine-symlink isn't already there (rm -> rm -f)

Use the "proginstall" rule from <bsd.prog.mk> to get the UPDATE
behaviour right.

Make "genprom" work in objdir.
Minor cleanup to ease bootcode development at non-standard locations.
Closes PR port-i386/4013 by Luke Mewburn.

branches: 1.7.2;
New welcome banner code, modeled after NetBSD/hp300's boot program
welcome banner code. Includes additional build information, and it
generally nicer to look at.

Use include files from kernel source, not userland. Create a
"machine" link automatically for this.

Define _STANDALONE for standalone programs.

Allow to boot from DOS if a XMS manager is installed.
XMS is recognized and used as temporary buffer for the kernel image.
The processor must still be in real mode at program start, so EMM386
or QEMM are not allowed. W*95 is OK.
Written by Martin Husemann (pr port-i386/3336).
Completely separated from other bootloaders for sanity.

Force inclusion of "diskbuf" into bootsectors.
This allows to build bootsectors containing netboot code
("make netboot.sym" in the netboot directory).

STRIP -> STRIPFLAG

branches: 1.1.1;
Initial revision

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Specify NOLIBCSANITIZER in x86 bootloader-like code under sys/arch/

Set NOLIBCSANITIZER for i386 and amd64 specific bootloader-like code.

branches: 1.92.2;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.91.12;
centralize vers.c building for standalone programs.

branches: 1.90.2; 1.90.4;
Compile the bootblocks for i386 CPUs, even when the main target architecture
is amd64.
Fixes PR port-i386/49725.

branches: 1.89.4; 1.89.6;
Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

Set KLINK_MACHINE

Use <bsd.klinks.mk>

branches: 1.86.2; 1.86.4;
Don't depend on HAVE_GCC being always present.

branches: 1.85.2;
remove all the code that supported HAVE_GCC=3. mostly from chuq.

Refactor compiler-specific optimizer flags. Mark bootxx as supported
with clang.

branches: 1.83.2;
Do not ignore errors from genprom.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.81.2; 1.81.4;
It just so happens we don't need -Wno-attributes if we
place __packed in the right place.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.78.2; 1.78.4;
Remove extra trailing slash in ${S} path.

branches: 1.77.2;
Use ${VERSIONFILE} instead of ${.ALLSRC} to match Makefile.boot.

This change stops the full path of newvers_stand.sh from showing up in
pxeboot_ia32.bin.

branches: 1.76.2; 1.76.4;
Wrap compiler-specific flags with HAVE_GCC and HAVE_PCC as necessary. Add a few flags for PCC.

Call newvers_stand.sh with -DM so we don't include the (unused) date
and builder in the data segment.

make vers.c also depend on the script that builds vers.c

branches: 1.73.16; 1.73.20; 1.73.22; 1.73.24; 1.73.26;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Remove -DBOOT_ELF64 to make build on amd64.

- Make i386 bootblocks boot amd64 kernels, and change to say "NetBSD/x86..."
- Don't bother booting a.out kernels any more.

branches: 1.70.14; 1.70.22; 1.70.32; 1.70.34; 1.70.36;
revert the previous because it doesn't work without destdir populated.
pointed by Valeriy E. Ushakov.

-I${S}/../common/include for libprop.

Convert to using CC instead of LD, as LDFLAGS is for CC not LD.

whitespace consistency

branches: 1.66.2;
Add -Wno-attributes for amd64, too.

branches: 1.65.2;
When creating BASE.rom, don't use BASE.bin as a temporary filename,
since the latter is a valid target name.

support MAKEVERBOSE

- -mcpu=i386 is gone in GCC4
- we need -Wno-attributes (to avoid __packed__ warnings)
- use -Wno-pointer-sign
- remove some redundancy from pxeboot/Makefile

branches: 1.62.4; 1.62.6; 1.62.8; 1.62.12;
merge ktrace-lwp.

use a .BEGIN target to make the various symlinks,
the previous way had problems with parallel make.

branches: 1.60.2;
add dependall and realdepend to the targets that we need to call in the
beginning. XXX: The real fix (handle dependencies in .BEGIN) is forthcoming.

PR/9567: Arne H. Juul: .BEGIN targets should not use dependencies.

branches: 1.58.10;
Use CPUFLAGS for codegen options.

Ignore errors on some rm -rf's for platforms that aren't quite
POSIX compliant
and return errors on r/o source (FreeBSD) for -rf. Fixes PR#25022

branches: 1.56.2;
stand/lib/crt/rom is no more, no need for it in .PATH

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

Need to explicitly create directory behing symlink.
Clean share lib directory.

Only build the libraries once,

BSSTART was only used for the (now depracated) old stand/biosboot code.

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.

As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).

amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.

* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.

* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.

* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.

* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.

installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)

mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

branches: 1.50.2;
Use ${MACHINE} when generating the version string, not plain 'i386'.

be consistent with other Makefiles here and invoke "rm -f" separately to ln -s

replace "ln -sf .... $@" with "rm -f $@ && ln -s .... $@"
since the latter works correctly ...

Clean up machine include dir handling a tad.

Remove definition of LIBSA_SUPPORT_UFS2, the source will only build separate
ufsv1 and ufsv2 objects (the merged one was too large for the code that only
supported a single fs type).

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

create a symlink so that eg <x86/trap.h> is found

Revert my last change. While it actually allows a build to finish,
an iso-image created from the resulting release won't boot. I don't
know if this change is the source of that, but one more knowledgable
than I about the x86 booter needs to look at this, and I don't want
the waters muddied any more than necessary.

Add CPPFLAGS+= -D__daddr_t=int32_t.

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed by mbr code to select default partition
(the mbr code doesn't do this yet).
NB only biosboot and dosboot have been tested so far.
(changes approved by christos and fvdl)

Make the ld workaround work on x88_64, and add the temporary ld script
to CLEANFILES.

Remove the 4k between code and data to increase the stack space.
Support for 64bit disk blocks seems to have exploded the code.

Stub out LIBCRT0, LIBCRTBEGIN, LIBCRTEND, and LIBC.

Some hacks to make this compile on x86_64.

make vers.c depend on ${SOURCES} and remove .PHONY tag for it, so that it
would only be regenerated if any of the input files changed

branches: 1.35.2;
Assign COPTS instead of adding to it, avoids situation where -mi386
is mixed with -march=something_incompatible

suggested by thorpej

Build with -ffreestanding.

branches: 1.33.6; 1.33.8;
Make sure we override any optimization options specified by the
user; the boot blocks don't work when built with e.g. -mcpu=i486
(probably due to how branches are aligned in that case, causing
segment boundaries to be crossed).

Cleanup of i386 bootloader building:
* Add separate directories for the individual netboot ROMs and
always build them.
* Each bootloader Makefile explicitly specifies the start file
and link address it wishes to use.
* genprom becomes a proper host program.
* Make sure all generated files get cleaned up.
* Set BINDIR in Makefile.inc
* Add compressed image support to pxeboot.
* Make pxeboot use the default serial console speed (9600).

Add a PXE boot loader. PXE interface code is derived by code
written by Alfred Perlstein, Paul Saab, John Baldwin for FreeBSD.

Still needs some work, but this will load a kernel on a Soekris net4501.

Many thanks to Frank van der Linden and his simulator wizardry for
helping me debug the low-level startup code.

Don't make the symlinks on clean rules as well as obj rules. Breaks r/o source
trees that haven't gotten to the make obj recursion part of make build
otherwise.

GCC 2.95 generates significantly larger code with -O2 than our old compiler did; this can cause the second-stage bootblock to exceed the number of blocks that fit in the list in the first-stage bootblock. I thought we used to explicitly set -Os in here; anyway, with this change, we do now!

objcopy -> ${OBJCOPY}; remove redundant definitions of OBJCOPY?= (it is
now in bsd.own.mk).

branches: 1.27.4;
Include bsd.own.mk a bit earlier so that make cleandir works.

branches: 1.26.4; 1.26.6;
switch to MI newvers_stand.sh version info generator

Fix the symlink hack.

branches: 1.24.2;
fix creation of DOS / ROM images from ELF executables: use "objcopy"

make sure the ./machine link is created early enough for specific targets,
fixes PR port-i386/7553 by David Rankin <drankin@bohemians.lexington.ky.us>

Use new loadfile.c

branches: 1.21.4;
Hack to make biosboot_ser work.

XXX The makefile structure in src/sys/arch/i386/stand is very bad.

$(OBJS) -> ${OBJS}

Also build serial bootblocks by default, installing into
/usr/mdec/biosboot_ser.sym
Change Makefile.booters to not assume `version' file is in source directory.

Remove "lib" directory only during "make cleandir" so that ".depend"
doesn't get nuked during "make clean".

Remove "lib" directory created during build process while doing
"make clean" or "make cleandir".

Remove exec.o, and make necessary changes for elf.

Both booters need exec.o now.

add dependency to get the version number right

add -nostdinc to CPPFLAGS, so that /usr/include won't be used

Nuke the override of libkern SRCS from orbit.

strchr.c disappeared from libkern, use index.c instead
(we can't control the libkern build as we want, but it works...)

Prevent error if machine-symlink isn't already there (rm -> rm -f)

Use the "proginstall" rule from <bsd.prog.mk> to get the UPDATE
behaviour right.

Make "genprom" work in objdir.
Minor cleanup to ease bootcode development at non-standard locations.
Closes PR port-i386/4013 by Luke Mewburn.

branches: 1.7.2;
New welcome banner code, modeled after NetBSD/hp300's boot program
welcome banner code. Includes additional build information, and it
generally nicer to look at.

Use include files from kernel source, not userland. Create a
"machine" link automatically for this.

Define _STANDALONE for standalone programs.

Allow to boot from DOS if a XMS manager is installed.
XMS is recognized and used as temporary buffer for the kernel image.
The processor must still be in real mode at program start, so EMM386
or QEMM are not allowed. W*95 is OK.
Written by Martin Husemann (pr port-i386/3336).
Completely separated from other bootloaders for sanity.

Force inclusion of "diskbuf" into bootsectors.
This allows to build bootsectors containing netboot code
("make netboot.sym" in the netboot directory).

STRIP -> STRIPFLAG

branches: 1.1.1;
Initial revision

Specify NOLIBCSANITIZER in x86 bootloader-like code under sys/arch/

Set NOLIBCSANITIZER for i386 and amd64 specific bootloader-like code.

- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.91.12;
centralize vers.c building for standalone programs.

branches: 1.90.2; 1.90.4;
Compile the bootblocks for i386 CPUs, even when the main target architecture
is amd64.
Fixes PR port-i386/49725.

branches: 1.89.4; 1.89.6;
Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

Set KLINK_MACHINE

Use <bsd.klinks.mk>

branches: 1.86.2; 1.86.4;
Don't depend on HAVE_GCC being always present.

branches: 1.85.2;
remove all the code that supported HAVE_GCC=3. mostly from chuq.

Refactor compiler-specific optimizer flags. Mark bootxx as supported
with clang.

branches: 1.83.2;
Do not ignore errors from genprom.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.81.2; 1.81.4;
It just so happens we don't need -Wno-attributes if we
place __packed in the right place.

remove almost all the ability to build netbsd with an a.out target.
we're ELF now, and there are many missing checks against OBJECT_FMT.
if we ever consider switching, the we can figure out what new ones
we need but for now it's just clutter.

this doesn't remove any of the support for exec_aout or any actually
required-for-boot a.out support, only the ability to build a netbsd
release in a.out format. ie, most of this code has been dead for
over a decade.

i've tested builds on vax, amd64, i386, mac68k, macppc, sparc, atari,
amiga, shark, cats, dreamcast, landisk, mmeye and x68k. this covers
the 5 MACHINE_ARCH's affected, and all the other arch code touched.
it also includes some actual run-time testing of sparc, i386 and
shark, and i performed binary comparison upon amiga and x68k as well.


some minor details relevant:
- move shlib.[ch] from ld.aout_so into ldconfig proper, and cut them
down to only the parts ldconfig needs
- remove various unused source files
- switch amiga bootblocks to using elf2bb.h instead of aout2bb.h

Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.78.2; 1.78.4;
Remove extra trailing slash in ${S} path.

branches: 1.77.2;
Use ${VERSIONFILE} instead of ${.ALLSRC} to match Makefile.boot.

This change stops the full path of newvers_stand.sh from showing up in
pxeboot_ia32.bin.

branches: 1.76.2; 1.76.4;
Wrap compiler-specific flags with HAVE_GCC and HAVE_PCC as necessary. Add a few flags for PCC.

Call newvers_stand.sh with -DM so we don't include the (unused) date
and builder in the data segment.

make vers.c also depend on the script that builds vers.c

branches: 1.73.16; 1.73.20; 1.73.22; 1.73.24; 1.73.26;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.