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Re: Fedora with Universal Binaries?



On Thu, 22 Oct 2009 19:28:36 +0200, King InuYasha wrote:
> I just saw this article about an effort to create Universal binary style ELF
> binaries for Linux, and I thought that this would be something to watch, so
> that Fedora could integrate both x86-32 and x86-64 into single DVD sets.

While I do not find useful "fat-elf" I did post an implementation of auto-biarch
Fedora LiveDVD but it was ignored.  Still keep it around personally myself.

Attached the post, former followups to it at:
https://www.redhat.com/archives/fedora-livecd-list/2009-June/msg00018.html


Regards,
Jan
--- Begin Message ---
Hi,

finally created a LiveDVD ISO automatically booting x86_64 OS on x86_64
(and i686 otherwise).  Regular users will not notice there exists any new arch
while they will benefit from the full performance of their PC:
	http://people.redhat.com/jkratoch/x86bilive-2009062000.tar.gz (71KB)

It uses live_dir=LiveOS-x86_64 vs. live_dir=LiveOS-i686 to boot the image.

The syslinux patch provides "default-{x86_64,i386}" keywords in isolinux.cfg.

livecd-iso-to-disk is not patched/compatible with such image.

livecd-creator should create such ISO on a single run, not by merging the
output of two livecd-creator runs by a 3rd party app.


Regards,
Jan

Reasons:

* I still did not understand why I have to carry with me two media - both
  x86_64 and i386 - when all the data perfectly fit on a single media.

* Why I have to try to boot x86_64 first to find out if the specific machine
  is x86_64?  Even common programmers do not know it, "Windows XP works here".

* The OS must "just work", it must be fun and easy.  Requiring a special
  technical decision before even starting the OS download is a showstopper.

* Checked that a regular user will on http://fedoraproject.org/get-fedora
  still download terrible performance degradation of 32-bit OS although her
  hadware is in 70%-95%(?) of cases x86_64.  x86_64 is here for 6 years now.

  * Arguing x86 may be faster than x86_64... I did not find any such case,
    x86_64 is a more modern arch (more registers, PIC for free, better ABI).
    We already hit the 2GB address space limitations.  x86_64 is the future.

* All the friends of mine have 8Mbit+ ADSL and TB disks downloading many DVD
  disks so some several more hundreds of MB are not something to notice.
mkisofs -f -J -r -hide-rr-moved -hide-joliet-trans-tbl -V Fedora-11-x86bi-Live -o ../x86bilive.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-info-table -boot-load-size 4 .

mount -r -o loop Fedora-11-x86_64-Live.iso x86_64/
mount -r -o loop Fedora-11-i686-Live.iso i686/

x86bilive:
total 4
lrwxrwxrwx 1 root root   13 2009-06-18 21:10 GPL -> ../x86_64/GPL
lrwxrwxrwx 1 root root   14 2009-06-18 21:11 LiveOS-i686 -> ../i686/LiveOS/
lrwxrwxrwx 1 root root   16 2009-06-18 21:10 LiveOS-x86_64 -> ../x86_64/LiveOS/
lrwxrwxrwx 1 root root   16 2009-06-18 21:10 README -> ../x86_64/README
drwxr-xr-x 2 root root 4096 2009-06-20 21:44 isolinux/

x86bilive/isolinux:
total 184
lrwxrwxrwx 1 root root     30 2009-06-18 21:13 boot.cat -> ../../x86_64/isolinux/boot.cat
lrwxrwxrwx 1 root root     31 2009-06-18 21:17 ii686 -> ../../i686/isolinux/initrd0.img
-rw-r--r-- 1 root root  14336 2009-06-20 21:45 isolinux.bin
-r--r--r-- 1 root root   1411 2009-06-20 21:44 isolinux.cfg
lrwxrwxrwx 1 root root     33 2009-06-18 21:13 ix8664 -> ../../x86_64/isolinux/initrd0.img
lrwxrwxrwx 1 root root     28 2009-06-18 21:17 ki686 -> ../../i686/isolinux/vmlinuz0
lrwxrwxrwx 1 root root     30 2009-06-18 21:13 kx8664 -> ../../x86_64/isolinux/vmlinuz0
lrwxrwxrwx 1 root root     29 2009-06-18 21:13 memtest -> ../../x86_64/isolinux/memtest
lrwxrwxrwx 1 root root     32 2009-06-18 21:13 splash.jpg -> ../../x86_64/isolinux/splash.jpg
-r--r--r-- 1 root root 159888 2009-06-20 20:48 vesamenu.c32

isolinux.cfg:

default vesamenu.c32
timeout 100

menu background splash.jpg
menu title Welcome to Fedora-11-x86bi-Live!
menu color border 0 #ffffffff #00000000
menu color sel 7 #ffffffff #ff000000
menu color title 0 #ffffffff #00000000
menu color tabmsg 0 #ffffffff #00000000
menu color unsel 0 #ffffffff #00000000
menu color hotsel 0 #ff000000 #ffffffff
menu color hotkey 7 #ffffffff #ff000000
menu color timeout_msg 0 #ffffffff #00000000
menu color timeout 0 #ffffffff #00000000
menu color cmdline 0 #ffffffff #00000000
menu hidden
menu hiddenrow 5
label linux0
  menu label x86_64 Boot
  kernel kx8664
  append initrd=ix8664 root=CDLABEL=Fedora-11-x86bi-Live rootfstype=auto live_dir=LiveOS-x86_64 ro liveimg quiet  rhgb
menu default-x86_64
label check0
  menu label x86_64 Verify and Boot
  kernel kx8664
  append initrd=ix8664 root=CDLABEL=Fedora-11-x86bi-Live rootfstype=auto live_dir=LiveOS-x86_64 ro liveimg quiet  rhgb check
label linux1
  menu label i686 Boot
  kernel ki686
  append initrd=ii686 root=CDLABEL=Fedora-11-x86bi-Live rootfstype=auto live_dir=LiveOS-i686 ro liveimg quiet  rhgb
menu default-i386
label check1
  menu label i686 Verify and Boot
  kernel ki686
  append initrd=ii686 root=CDLABEL=Fedora-11-x86bi-Live rootfstype=auto live_dir=LiveOS-i686 ro liveimg quiet  rhgb check
label memtest
  menu label Memory Test
  kernel memtest
label local
  menu label Boot from local drive
  localboot 0xffff
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ defaults.patch	20 Jun 2009 20:10:46 -0000
@@ -0,0 +1,175 @@
+--- syslinux-3.75-orig/com32/menu/Makefile	2009-04-16 06:42:14.000000000 +0200
++++ syslinux-3.75-defaults/com32/menu/Makefile	2009-06-20 19:21:32.000000000 +0200
+@@ -24,7 +24,7 @@ MODULES	  = menu.c32 vesamenu.c32
+ TESTFILES =
+ 
+ COMMONOBJS = menumain.o readconfig.o passwd.o drain.o printmsg.o colors.o \
+-	background.o refstr.o execute.o
++	background.o refstr.o execute.o verify_cpu.o
+ 
+ all: $(MODULES) $(TESTFILES)
+ 
+--- syslinux-3.75-orig/com32/menu/menu.h	2009-04-16 06:42:14.000000000 +0200
++++ syslinux-3.75-defaults/com32/menu/menu.h	2009-06-20 19:21:32.000000000 +0200
+@@ -224,4 +224,9 @@ void execute(const char *cmdline, enum k
+ /* drain.c */
+ void drain_keyboard(void);
+ 
++/* verify_cpu.S */
++#if defined(__i386__) || defined(__x86_64__)
++int verify_cpu(void);
++#endif
++
+ #endif /* MENU_H */
+--- syslinux-3.75-orig/com32/menu/readconfig.c	2009-04-16 06:42:14.000000000 +0200
++++ syslinux-3.75-defaults/com32/menu/readconfig.c	2009-06-20 20:23:24.000000000 +0200
+@@ -656,11 +656,22 @@ static void parse_config_file(FILE *f)
+ 	    m->parent_entry->displayname = refstr_get(m->title);
+ 	  }
+ 	}
+-      } else if ( looking_at(p, "default") ) {
+-	if (ld.label) {
+-	  ld.menudefault = 1;
+-	} else if (m->parent_entry) {
+-	  m->parent->defentry = m->parent_entry->entry;
++      } else if ( looking_at(p, "default")
++#if defined(__i386__) || defined(__x86_64__)
++		  || looking_at(p, "default-i386")
++		  || looking_at(p, "default-x86_64")
++#endif
++		  ) {
++#if defined(__i386__) || defined(__x86_64__)
++        if (! ( ( looking_at(p, "default-i386") && verify_cpu () == 0 ) ||
++	        ( looking_at(p, "default-x86_64") && verify_cpu () != 0 ) ) )
++#endif
++	{
++	  if (ld.label) {
++	    ld.menudefault = 1;
++	  } else if (m->parent_entry) {
++	    m->parent->defentry = m->parent_entry->entry;
++	  }
+ 	}
+       } else if ( looking_at(p, "hide") ) {
+ 	ld.menuhide = 1;
+--- syslinux-3.75-orig/com32/menu/verify_cpu.S	1970-01-01 01:00:00.000000000 +0100
++++ syslinux-3.75-defaults/com32/menu/verify_cpu.S	2009-06-20 20:30:27.000000000 +0200
+@@ -0,0 +1,119 @@
++/* https://lists.linux-foundation.org/pipermail/fastboot/2006-November/011885.html */
++#if defined(__i386__) || defined(__x86_64__)
++	.globl	verify_cpu
++verify_cpu:
++	push	%ebx
++	push	%esi
++	push	%edi
++	push	%ebp
++	call	Xverify_cpu
++	pop	%ebp
++	pop	%edi
++	pop	%esi
++	pop	%ebx
++	ret
++
++/*
++ *
++ *	verify_cpu.S
++ *
++ * 	14 Nov 2006  Vivek Goyal: Created the file
++ *
++ *	This is a common code for verification whether CPU supports
++ * 	long mode and SSE or not. It is not called directly instead this
++ *	file is included at various places and compiled in that context.
++ * 	Following are the current usage.
++ *
++ * 	This file is included by both 16bit and 32bit code.
++ *
++ *	arch/x86_64/boot/setup.S : Boot cpu verification (16bit)
++ *	arch/x86_64/boot/compressed/head.S: Boot cpu verification (32bit)
++ *	arch/x86_64/kernel/trampoline.S: secondary processor verfication (16bit)
++ *	arch/x86_64/kernel/acpi/wakeup.S:Verfication at resume (16bit)
++ *
++ *	verify_cpu, returns the status of cpu check in register %eax.
++ *		0: Success    1: Failure
++ *
++ * 	The caller needs to check for the error code and take the action
++ * 	appropriately. Either display a message or halt.
++ */
++
++Xverify_cpu:
++
++	pushfl				# Save caller passed flags
++	pushl	$0			# Kill any dangerous flags
++	popfl
++
++	/* minimum CPUID flags for x86-64 */
++	/* see http://www.x86-64.org/lists/discuss/msg02971.html */
++#define SSE_MASK ((1<<25)|(1<<26))
++#define REQUIRED_MASK1 ((1<<0)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<8)|\
++					   (1<<13)|(1<<15)|(1<<24))
++#define REQUIRED_MASK2 (1<<29)
++	pushfl				# standard way to check for cpuid
++	popl	%eax
++	movl	%eax,%ebx
++	xorl	$0x200000,%eax
++	pushl	%eax
++	popfl
++	pushfl
++	popl	%eax
++	cmpl	%eax,%ebx
++	jz	verify_cpu_no_longmode	# cpu has no cpuid
++
++	movl	$0x0,%eax		# See if cpuid 1 is implemented
++	cpuid
++	cmpl	$0x1,%eax
++	jb	verify_cpu_no_longmode	# no cpuid 1
++
++	xor	%di,%di
++	cmpl	$0x68747541,%ebx	# AuthenticAMD
++	jnz	verify_cpu_noamd
++	cmpl	$0x69746e65,%edx
++	jnz	verify_cpu_noamd
++	cmpl	$0x444d4163,%ecx
++	jnz	verify_cpu_noamd
++	mov	$1,%di			# cpu is from AMD
++
++verify_cpu_noamd:
++	movl    $0x1,%eax		# Does the cpu have what it takes
++	cpuid
++	andl	$REQUIRED_MASK1,%edx
++	xorl	$REQUIRED_MASK1,%edx
++	jnz	verify_cpu_no_longmode
++
++	movl    $0x80000000,%eax	# See if extended cpuid is implemented
++	cpuid
++	cmpl    $0x80000001,%eax
++	jb      verify_cpu_no_longmode	# no extended cpuid
++
++	movl    $0x80000001,%eax	# Does the cpu have what it takes
++	cpuid
++	andl    $REQUIRED_MASK2,%edx
++	xorl    $REQUIRED_MASK2,%edx
++	jnz     verify_cpu_no_longmode
++
++verify_cpu_sse_test:
++	movl	$1,%eax
++	cpuid
++	andl	$SSE_MASK,%edx
++	cmpl	$SSE_MASK,%edx
++	je	verify_cpu_sse_ok
++	test	%di,%di
++	jz	verify_cpu_no_longmode	# only try to force SSE on AMD
++	movl	$0xc0010015,%ecx	# HWCR
++	rdmsr
++	btr	$15,%eax		# enable SSE
++	wrmsr
++	xor	%di,%di			# don't loop
++	jmp	verify_cpu_sse_test	# try again
++
++verify_cpu_no_longmode:
++	popfl				# Restore caller passed flags
++	movl $1,%eax
++	ret
++verify_cpu_sse_ok:
++	popfl				# Restore caller passed flags
++	xorl %eax, %eax
++	ret
++#endif
--- syslinux.spec	16 Apr 2009 18:11:30 -0000	1.59
+++ syslinux.spec	20 Jun 2009 20:10:46 -0000
@@ -7,6 +7,7 @@ License: GPLv2+
 Group: Applications/System
 URL: http://syslinux.zytor.com/
 Source0: ftp://ftp.kernel.org/pub/linux/utils/boot/syslinux/%{name}-%{tarball_version}.tar.bz2
+Patch9: defaults.patch
 ExclusiveArch: %{ix86} x86_64
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: nasm >= 0.98.38-1, perl, netpbm-progs
@@ -33,12 +34,18 @@ MEMDISK, which loads legacy operating sy
 
 %prep
 %setup -q -n syslinux-%{tarball_version}
+%patch9 -p1
 
 %build
 CFLAGS="-Werror -Wno-unused -finline-limit=2000"
 export CFLAGS
 # If you make clean here, we lose the provided syslinux.exe
 #make clean
+rm -f com32/menu/vesamenu.c32
+make -C com32/lib libcom32.a
+make -C com32/gpllib libcom32gpl.a
+make -C com32/menu vesamenu.c32
+test -f com32/menu/vesamenu.c32
 make installer
 make -C sample tidy
 
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