x86/dosboot: Drop no-longer-available -DSLOW for libz

It should be lost during merge from upstream.

We may introduce a similar hack again, if it is *really* required;
inflate_fast() may be dropped by using slow path unconditionally.

x86/dosboot: Do not page-align data segment

4K alignment is too heavy burden for COM executable with 64K limit :)

Fix binary size overflow for clang/amd64.

x86/dosboot: Allow NULL dereference to fetch command line arguments

DOS command line arguments are provided as struct psp at 0x0000;
see doscommain.c.

Recent versions of gcc and clang are clever enough to optimize code
block involving NULL dereference into ud2 insn.

Sprinkle -fno-delete-null-pointer-checks to doscommain.c to
prevent this behavior.

Note that dosboot.com for netbsd-9 and later was broken due to
this ``over optimization''. gcc 5.5.0 and clang 4.0.0 in netbsd-8
generate correct codes without this workaround.

XXX
Are there still use cases for dosboot.com? Does anyone want to
boot NetBSD from real-mode DOS in 2023?

Consistently use ${RELEASEDIR}/${RELEASEMACHINE} instead of
${RELEASEDIR}/${MACHINE} (Paul Ripke)

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

branches: 1.31.2; 1.31.6;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.30.10; 1.30.16;
We'll define the kernel types for standalone code.

Define _KERNTYPES for things that need it.

branches: 1.28.6;
Reduce amount of -no-integrated-as on x86 as .code16 is now supported by
LLVM.

branches: 1.27.6; 1.27.10;
Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

- add 'ls' op to struct fs_ops to support ls command on each fs,
enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
in libsa
- split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
that opens the target fs and calls fs-depedent XXX_ls() functions
- add a ls op for ext2fs
(all other fs than ufs and ext2fs don't have actual ls ops yet)
- replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

branches: 1.26.4; 1.26.8;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.25.4; 1.25.6;
Remove extra trailing slash in ${S} path.

branches: 1.24.2; 1.24.8;
disable PIE for boot code.

branches: 1.23.104; 1.23.108; 1.23.114;
Add -DSLOW to reduce the size of libz a bit.

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)

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

branches: 1.20.2;
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).

MKfoo=no -> NOfoo

branches: 1.18.4;
g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.17.4;
Get RELEASEDIR setting from /etc/mk.conf. Fixes misc/11104 by Markus Kurek.

Fix to work with objdir.

install dosboot.com in the release(7) hierarchy.

Enable "old partition ID" compatibility by default, just as in biosboot.

branches: 1.13.2; 1.13.14;
add prototypes, use ufs_ls() from mi libsa,
compile with -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main

define VERSIONFILE, from John Darrow <John.P.Darrow@wheaton.edu>
per PR port-i386/7336

branches: 1.11.2; 1.11.4;
convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Add exec.c here and bump version for elf.
XXX: This code has not been tested!

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

Make new memory detection default.
Introduce a new option, "CONSERVATIVE_MEMDETECT", which disables the
new BIOS calls.

Prepare definition for EXTENDED_MEMDETECT.
Not yet default.

branches: 1.6.2;
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.

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.

Remove some relicts from the time before libsa/Makefile got
"SAMISCCPPFLAGS".
Enable -Wall.

Override the proginstall target to do our special hackery. (Yuck.)

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision

Consistently use ${RELEASEDIR}/${RELEASEMACHINE} instead of
${RELEASEDIR}/${MACHINE} (Paul Ripke)

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

branches: 1.31.6;
- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.30.10; 1.30.16;
We'll define the kernel types for standalone code.

Define _KERNTYPES for things that need it.

branches: 1.28.6;
Reduce amount of -no-integrated-as on x86 as .code16 is now supported by
LLVM.

branches: 1.27.6; 1.27.10;
Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

- add 'ls' op to struct fs_ops to support ls command on each fs,
enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
in libsa
- split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
that opens the target fs and calls fs-depedent XXX_ls() functions
- add a ls op for ext2fs
(all other fs than ufs and ext2fs don't have actual ls ops yet)
- replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

branches: 1.26.4; 1.26.8;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.25.4; 1.25.6;
Remove extra trailing slash in ${S} path.

branches: 1.24.2; 1.24.8;
disable PIE for boot code.

branches: 1.23.104; 1.23.108; 1.23.114;
Add -DSLOW to reduce the size of libz a bit.

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)

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

branches: 1.20.2;
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).

MKfoo=no -> NOfoo

branches: 1.18.4;
g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.17.4;
Get RELEASEDIR setting from /etc/mk.conf. Fixes misc/11104 by Markus Kurek.

Fix to work with objdir.

install dosboot.com in the release(7) hierarchy.

Enable "old partition ID" compatibility by default, just as in biosboot.

branches: 1.13.2; 1.13.14;
add prototypes, use ufs_ls() from mi libsa,
compile with -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main

define VERSIONFILE, from John Darrow <John.P.Darrow@wheaton.edu>
per PR port-i386/7336

branches: 1.11.2; 1.11.4;
convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Add exec.c here and bump version for elf.
XXX: This code has not been tested!

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

Make new memory detection default.
Introduce a new option, "CONSERVATIVE_MEMDETECT", which disables the
new BIOS calls.

Prepare definition for EXTENDED_MEMDETECT.
Not yet default.

branches: 1.6.2;
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.

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.

Remove some relicts from the time before libsa/Makefile got
"SAMISCCPPFLAGS".
Enable -Wall.

Override the proginstall target to do our special hackery. (Yuck.)

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.30.16;
We'll define the kernel types for standalone code.

Define _KERNTYPES for things that need it.

branches: 1.28.6;
Reduce amount of -no-integrated-as on x86 as .code16 is now supported by
LLVM.

branches: 1.27.6; 1.27.10;
Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

- add 'ls' op to struct fs_ops to support ls command on each fs,
enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
in libsa
- split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
that opens the target fs and calls fs-depedent XXX_ls() functions
- add a ls op for ext2fs
(all other fs than ufs and ext2fs don't have actual ls ops yet)
- replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

branches: 1.26.4; 1.26.8;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.25.4; 1.25.6;
Remove extra trailing slash in ${S} path.

branches: 1.24.2; 1.24.8;
disable PIE for boot code.

branches: 1.23.104; 1.23.108; 1.23.114;
Add -DSLOW to reduce the size of libz a bit.

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)

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

branches: 1.20.2;
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).

MKfoo=no -> NOfoo

branches: 1.18.4;
g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.17.4;
Get RELEASEDIR setting from /etc/mk.conf. Fixes misc/11104 by Markus Kurek.

Fix to work with objdir.

install dosboot.com in the release(7) hierarchy.

Enable "old partition ID" compatibility by default, just as in biosboot.

branches: 1.13.2; 1.13.14;
add prototypes, use ufs_ls() from mi libsa,
compile with -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main

define VERSIONFILE, from John Darrow <John.P.Darrow@wheaton.edu>
per PR port-i386/7336

branches: 1.11.2; 1.11.4;
convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Add exec.c here and bump version for elf.
XXX: This code has not been tested!

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

Make new memory detection default.
Introduce a new option, "CONSERVATIVE_MEMDETECT", which disables the
new BIOS calls.

Prepare definition for EXTENDED_MEMDETECT.
Not yet default.

branches: 1.6.2;
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.

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.

Remove some relicts from the time before libsa/Makefile got
"SAMISCCPPFLAGS".
Enable -Wall.

Override the proginstall target to do our special hackery. (Yuck.)

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision

- Disable MKSANITIZER
- Redo using NOPIE
- Add NORELRO

branches: 1.30.16;
We'll define the kernel types for standalone code.

Define _KERNTYPES for things that need it.

branches: 1.28.6;
Reduce amount of -no-integrated-as on x86 as .code16 is now supported by
LLVM.

branches: 1.27.6; 1.27.10;
Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

- add 'ls' op to struct fs_ops to support ls command on each fs,
enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
in libsa
- split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
that opens the target fs and calls fs-depedent XXX_ls() functions
- add a ls op for ext2fs
(all other fs than ufs and ext2fs don't have actual ls ops yet)
- replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

branches: 1.26.4; 1.26.8;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.25.4; 1.25.6;
Remove extra trailing slash in ${S} path.

branches: 1.24.2; 1.24.8;
disable PIE for boot code.

branches: 1.23.104; 1.23.108; 1.23.114;
Add -DSLOW to reduce the size of libz a bit.

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)

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

branches: 1.20.2;
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).

MKfoo=no -> NOfoo

branches: 1.18.4;
g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.17.4;
Get RELEASEDIR setting from /etc/mk.conf. Fixes misc/11104 by Markus Kurek.

Fix to work with objdir.

install dosboot.com in the release(7) hierarchy.

Enable "old partition ID" compatibility by default, just as in biosboot.

branches: 1.13.2; 1.13.14;
add prototypes, use ufs_ls() from mi libsa,
compile with -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main

define VERSIONFILE, from John Darrow <John.P.Darrow@wheaton.edu>
per PR port-i386/7336

branches: 1.11.2; 1.11.4;
convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Add exec.c here and bump version for elf.
XXX: This code has not been tested!

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

Make new memory detection default.
Introduce a new option, "CONSERVATIVE_MEMDETECT", which disables the
new BIOS calls.

Prepare definition for EXTENDED_MEMDETECT.
Not yet default.

branches: 1.6.2;
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.

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.

Remove some relicts from the time before libsa/Makefile got
"SAMISCCPPFLAGS".
Enable -Wall.

Override the proginstall target to do our special hackery. (Yuck.)

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision

We'll define the kernel types for standalone code.

Define _KERNTYPES for things that need it.

branches: 1.28.6;
Reduce amount of -no-integrated-as on x86 as .code16 is now supported by
LLVM.

branches: 1.27.6; 1.27.10;
Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

- add 'ls' op to struct fs_ops to support ls command on each fs,
enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
in libsa
- split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
that opens the target fs and calls fs-depedent XXX_ls() functions
- add a ls op for ext2fs
(all other fs than ufs and ext2fs don't have actual ls ops yet)
- replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

branches: 1.26.4; 1.26.8;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.25.4; 1.25.6;
Remove extra trailing slash in ${S} path.

branches: 1.24.2; 1.24.8;
disable PIE for boot code.

branches: 1.23.104; 1.23.108; 1.23.114;
Add -DSLOW to reduce the size of libz a bit.

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)

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

branches: 1.20.2;
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).

MKfoo=no -> NOfoo

branches: 1.18.4;
g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.17.4;
Get RELEASEDIR setting from /etc/mk.conf. Fixes misc/11104 by Markus Kurek.

Fix to work with objdir.

install dosboot.com in the release(7) hierarchy.

Enable "old partition ID" compatibility by default, just as in biosboot.

branches: 1.13.2; 1.13.14;
add prototypes, use ufs_ls() from mi libsa,
compile with -Wall -Wmissing-prototypes -Wstrict-prototypes -Wno-main

define VERSIONFILE, from John Darrow <John.P.Darrow@wheaton.edu>
per PR port-i386/7336

branches: 1.11.2; 1.11.4;
convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Add exec.c here and bump version for elf.
XXX: This code has not been tested!

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

Make new memory detection default.
Introduce a new option, "CONSERVATIVE_MEMDETECT", which disables the
new BIOS calls.

Prepare definition for EXTENDED_MEMDETECT.
Not yet default.

branches: 1.6.2;
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.

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.

Remove some relicts from the time before libsa/Makefile got
"SAMISCCPPFLAGS".
Enable -Wall.

Override the proginstall target to do our special hackery. (Yuck.)

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision