freebsd-nq/stand/i386/pmbr/Makefile

# $FreeBSD$

PROG=	pmbr
STRIP=
BINMODE=${NOBINMODE}
SRCS=	${PROG}.S

BOOT_MBR_FLAGS?=	0

ORG=	0x600

ACFLAGS+=-Wa,-defsym,FLAGS=${BOOT_MBR_FLAGS}
LDFLAGS+=${LDFLAGS_BIN}

.include <bsd.prog.mk>
First cut at support for booting a GPT labeled disk via the BIOS bootstrap on i386 and amd64 machines. The overall process is that /boot/pmbr lives in the PMBR (similar to /boot/mbr for MBR disks) and is responsible for locating and loading /boot/gptboot. /boot/gptboot is similar to /boot/boot except that it groks GPT rather than MBR + bsdlabel. Unlike /boot/boot, /boot/gptboot lives in its own dedicated GPT partition with a new "FreeBSD boot" type. This partition does not have a fixed size in that /boot/pmbr will load the entire partition into the lower 640k. However, it is limited in that it can only be 545k. That's still a lot better than the current 7.5k limit for boot2 on MBR. gptboot mostly acts just like boot2 in that it reads /boot.config and loads up /boot/loader. Some more details: - Include uuid_equal() and uuid_is_nil() in libstand. - Add a new 'boot' command to gpt(8) which makes a GPT disk bootable using /boot/pmbr and /boot/gptboot. Note that the disk must have some free space for the boot partition. - This required exposing the backend of the 'add' function as a gpt_add_part() function to the rest of gpt(8). 'boot' uses this to create a boot partition if needed. - Don't cripple cgbase() in the UFS boot code for /boot/gptboot so that it can handle a filesystem > 1.5 TB. - /boot/gptboot has a simple loader (gptldr) that doesn't do any I/O unlike boot1 since /boot/pmbr loads all of gptboot up front. The C portion of gptboot (gptboot.c) has been repocopied from boot2.c. The primary changes are to parse the GPT to find a root filesystem and to use 64-bit disk addresses. Currently gptboot assumes that the first UFS partition on the disk is the / filesystem, but this algorithm will likely be improved in the future. - Teach the biosdisk driver in /boot/loader to understand GPT tables. GPT partitions are identified as 'disk0pX:' (e.g. disk0p2:) which is similar to the /dev names the kernel uses (e.g. /dev/ad0p2). - Add a new "freebsd-boot" alias to g_part() for the new boot UUID. MFC after: 1 month Discussed with: marcel (some things might still change, but am committing what I have so far) 2007-10-24 21:33:00 +00:00			`# $FreeBSD$`

			`PROG= pmbr`
			`STRIP=`
			`BINMODE=${NOBINMODE}`
stand/i386: rename .s to .S to use Clang IAS As part of the migration away from obsolete binutils we want to retire GNU as. Most assembly files used on amd64 have a .S extension and (via rules in share/mk/bsd.suffixes.mk) are assembled with Clang's Integrated Assembler (IAS). Rename files in stand/i386 to .S to use the integrated assembler. Clang's IAS supports the defsym option (via -Wa,) but only with one dash, not two. As both -defsym and --defsym are accepted by GNU as, use the former. PR: 233611 Reviewed by: tsoome Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D18369 2018-12-03 19:16:34 +00:00			`SRCS= ${PROG}.S`

			`BOOT_MBR_FLAGS?= 0`
First cut at support for booting a GPT labeled disk via the BIOS bootstrap on i386 and amd64 machines. The overall process is that /boot/pmbr lives in the PMBR (similar to /boot/mbr for MBR disks) and is responsible for locating and loading /boot/gptboot. /boot/gptboot is similar to /boot/boot except that it groks GPT rather than MBR + bsdlabel. Unlike /boot/boot, /boot/gptboot lives in its own dedicated GPT partition with a new "FreeBSD boot" type. This partition does not have a fixed size in that /boot/pmbr will load the entire partition into the lower 640k. However, it is limited in that it can only be 545k. That's still a lot better than the current 7.5k limit for boot2 on MBR. gptboot mostly acts just like boot2 in that it reads /boot.config and loads up /boot/loader. Some more details: - Include uuid_equal() and uuid_is_nil() in libstand. - Add a new 'boot' command to gpt(8) which makes a GPT disk bootable using /boot/pmbr and /boot/gptboot. Note that the disk must have some free space for the boot partition. - This required exposing the backend of the 'add' function as a gpt_add_part() function to the rest of gpt(8). 'boot' uses this to create a boot partition if needed. - Don't cripple cgbase() in the UFS boot code for /boot/gptboot so that it can handle a filesystem > 1.5 TB. - /boot/gptboot has a simple loader (gptldr) that doesn't do any I/O unlike boot1 since /boot/pmbr loads all of gptboot up front. The C portion of gptboot (gptboot.c) has been repocopied from boot2.c. The primary changes are to parse the GPT to find a root filesystem and to use 64-bit disk addresses. Currently gptboot assumes that the first UFS partition on the disk is the / filesystem, but this algorithm will likely be improved in the future. - Teach the biosdisk driver in /boot/loader to understand GPT tables. GPT partitions are identified as 'disk0pX:' (e.g. disk0p2:) which is similar to the /dev names the kernel uses (e.g. /dev/ad0p2). - Add a new "freebsd-boot" alias to g_part() for the new boot UUID. MFC after: 1 month Discussed with: marcel (some things might still change, but am committing what I have so far) 2007-10-24 21:33:00 +00:00
			`ORG= 0x600`

stand/i386: rename .s to .S to use Clang IAS As part of the migration away from obsolete binutils we want to retire GNU as. Most assembly files used on amd64 have a .S extension and (via rules in share/mk/bsd.suffixes.mk) are assembled with Clang's Integrated Assembler (IAS). Rename files in stand/i386 to .S to use the integrated assembler. Clang's IAS supports the defsym option (via -Wa,) but only with one dash, not two. As both -defsym and --defsym are accepted by GNU as, use the former. PR: 233611 Reviewed by: tsoome Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D18369 2018-12-03 19:16:34 +00:00			`ACFLAGS+=-Wa,-defsym,FLAGS=${BOOT_MBR_FLAGS}`
Use defs.mk name and prefer bsd.init.mk Also need to make some small tweaks to the Makefiles to use += rather than = due to small shift in include file order. Sponsored by: Netflix 2017-10-30 23:14:37 +00:00			`LDFLAGS+=${LDFLAGS_BIN}`
First cut at support for booting a GPT labeled disk via the BIOS bootstrap on i386 and amd64 machines. The overall process is that /boot/pmbr lives in the PMBR (similar to /boot/mbr for MBR disks) and is responsible for locating and loading /boot/gptboot. /boot/gptboot is similar to /boot/boot except that it groks GPT rather than MBR + bsdlabel. Unlike /boot/boot, /boot/gptboot lives in its own dedicated GPT partition with a new "FreeBSD boot" type. This partition does not have a fixed size in that /boot/pmbr will load the entire partition into the lower 640k. However, it is limited in that it can only be 545k. That's still a lot better than the current 7.5k limit for boot2 on MBR. gptboot mostly acts just like boot2 in that it reads /boot.config and loads up /boot/loader. Some more details: - Include uuid_equal() and uuid_is_nil() in libstand. - Add a new 'boot' command to gpt(8) which makes a GPT disk bootable using /boot/pmbr and /boot/gptboot. Note that the disk must have some free space for the boot partition. - This required exposing the backend of the 'add' function as a gpt_add_part() function to the rest of gpt(8). 'boot' uses this to create a boot partition if needed. - Don't cripple cgbase() in the UFS boot code for /boot/gptboot so that it can handle a filesystem > 1.5 TB. - /boot/gptboot has a simple loader (gptldr) that doesn't do any I/O unlike boot1 since /boot/pmbr loads all of gptboot up front. The C portion of gptboot (gptboot.c) has been repocopied from boot2.c. The primary changes are to parse the GPT to find a root filesystem and to use 64-bit disk addresses. Currently gptboot assumes that the first UFS partition on the disk is the / filesystem, but this algorithm will likely be improved in the future. - Teach the biosdisk driver in /boot/loader to understand GPT tables. GPT partitions are identified as 'disk0pX:' (e.g. disk0p2:) which is similar to the /dev names the kernel uses (e.g. /dev/ad0p2). - Add a new "freebsd-boot" alias to g_part() for the new boot UUID. MFC after: 1 month Discussed with: marcel (some things might still change, but am committing what I have so far) 2007-10-24 21:33:00 +00:00
			`.include <bsd.prog.mk>`