08 Jul, 2008
1 commit
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There are various constraints on the use of unit-at-a-time:
- i386 uses no-unit-at-a-time for pre-4.0 (not 4.3)
- x86_64 uses unit-at-a-time alwaysUli reported a crash on x86_64 with gcc 4.1.2 with unit-at-a-time,
resulting in commit c0a18111e571138747a98af18b3a2124df56a0d1Ingo reported a gcc internal error with gcc 4.3 with no-unit-at-a-timem,
resulting in 22eecde2f9034764a3fd095eecfa3adfb8ec9a98Benny Halevy is seeing extern inlines not resolved with gcc 4.3 with
no-unit-at-a-timeThis patch reintroduces unit-at-a-time for gcc >= 4.0, bringing back the
possibility of Uli's crash. If that happens, we'll debug it.I started seeing both the internal compiler errors and unresolved
inlines on Fedora 9. This patch fixes both problems, without so far
reintroducing the crash reported by Uli.Signed-off-by: Jeff Dike
Cc: Benny Halevy
Cc: Adrian Bunk
Cc: Ingo Molnar
Cc: Ulrich Drepper
Signed-off-by: Linus Torvalds
07 May, 2008
1 commit
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This reverts commit 22eecde2f9034764a3fd095eecfa3adfb8ec9a98. Uli
reports that it breaks UML on x86-64 with the Fedora 8 gcc (gcc 4.1.2),
causing a crash on startup. Seehttp://marc.info/?l=linux-kernel&m=121011722806093&w=2
for a trace.
Reported-by: Ulrich Drepper
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Andrew Morton
Signed-off-by: Linus Torvalds
05 May, 2008
1 commit
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this is what caused gcc 4.3 to throw an internal error when
OPTIMIZE_INLINING was enabled ...Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
09 Feb, 2008
1 commit
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Calculate TASK_SIZE at run-time by figuring out the host's VMSPLIT - this is
needed on i386 if UML is to run on hosts with varying VMSPLITs without
recompilation.TASK_SIZE is now defined in terms of a variable, task_size. This gets rid of
an include of pgtable.h from processor.h, which can cause include loops.On i386, task_size is calculated early in boot by probing the address space in
a binary search to figure out where the boundary between usable and non-usable
memory is. This tries to make sure that a page that is considered to be in
userspace is, or can be made, read-write. I'm concerned about a system-global
VDSO page in kernel memory being hit and considered to be a userspace page.On x86_64, task_size is just the old value of CONFIG_TOP_ADDR.
A bunch of config variable are gone now. CONFIG_TOP_ADDR is directly replaced
by TASK_SIZE. NEST_LEVEL is gone since the relocation of the stubs makes it
irrelevant. All the HOST_VMSPLIT stuff is gone. All references to these in
arch/um/Makefile are also gone.I noticed and fixed a missing extern in os.h when adding os_get_task_size.
Note: This has been revised to fix the 32-bit UML on 64-bit host bug that
Miklos ran into.Signed-off-by: Jeff Dike
Cc: Miklos Szeredi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Feb, 2008
3 commits
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TOPDIR is obsolete, use srctree instead. This patch removes TOPDIR from all
UML Makefiles.Cc: Sam Ravnborg
Signed-off-by: WANG Cong
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
UML still needed some work in order to allow CFLAGS to be passed in from the
command line.USER_CFLAGS is produced from KBUILD_CFLAGS in part by removing all the -I
switches. This is so that kernel headers don't accidentally get pulled into
libc files. However, a common use of command-line CFLAGS would be to add -I
switches to the build. This patch specifically adds any command-line -I flags
back to USER_CFLAGS.I also corrected the spelling of LFLAGS to LDFLAGS.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allow LFLAGS to be given to make and have the expected effect.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Nov, 2007
1 commit
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include/asm-um/arch points to the non-existed include/asm-i386 directory.
Signed-off-by: WANG Cong
Cc: Jeff Dike
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Nov, 2007
1 commit
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symlinks to directories in the non-O= case were lacking -n, which meant
that, when the link already existed, a new link pointing at itself was
created in the target directory.Signed-off-by: Jeff Dike
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Nov, 2007
1 commit
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KERNEL_DEFINES needs whitespace trimmed, otherwise the whitespace crunching
done by make fools the patsubst which is used to remove KERNEL_DEFINES from
USER_CFLAGS.Signed-off-by: Jeff Dike
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
4 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (40 commits)
kbuild: introduce ccflags-y, asflags-y and ldflags-y
kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP
kbuild: enable use of AFLAGS and CFLAGS on commandline
kbuild: enable 'make AFLAGS=...' to add additional options to AS
kbuild: fix AFLAGS use in h8300 and m68knommu
kbuild: check for wrong use of CFLAGS
kbuild: enable 'make CFLAGS=...' to add additional options to CC
kbuild: fix up CFLAGS usage
kbuild: make modpost detect unterminated device id lists
kbuild: call export_report from the Makefile
kbuild: move Kai Germaschewski to CREDITS
kconfig/menuconfig: distinguish between selected-by-another options and comments
kconfig: tristate choices with mixed tristate and boolean values
include/linux/Kbuild: remove duplicate entries
kbuild: kill backward compatibility checks
kbuild: kill EXTRA_ARFLAGS
kbuild: fix documentation in makefiles.txt
kbuild: call make once for all targets when O=.. is used
kbuild: pass -g to assembler under CONFIG_DEBUG_INFO
kbuild: update _shipped files for kconfig syntax cleanup
...Fix up conflicts in arch/um/sys-{x86_64,i386}/Makefile manually.
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Formatting changes in the files which have been changed in the
tt-removal patchset so far. These include:
copyright updates
header file trimming
style fixes
adding severity to printks
indenting Kconfig help according to the predominant kernel styleThese changes should be entirely non-functional.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patchset throws out tt mode, which has been non-functional for a while.
This is done in phases, interspersed with code cleanups on the affected files.
The removal is done as follows:
remove all code, config options, and files which depend on
CONFIG_MODE_TT
get rid of the CHOOSE_MODE macro, which decided whether to
call tt-mode or skas-mode code, and replace invocations with their
skas portions
replace all now-trivial procedures with their skas equivalentsThere are now a bunch of now-redundant pieces of data structures, including
mode-specific pieces of the thread structure, pt_regs, and mm_context. These
are all replaced with their skas-specific contents.As part of the ongoing style compliance project, I made a style pass over all
files that were changed. There are three such patches, one for each phase,
covering the files affected by that phase but no later ones.I noticed that we weren't freeing the LDT state associated with a process when
it exited, so that's fixed in one of the later patches.The last patch is a tidying patch which I've had for a while, but which caused
inexplicable crashes under tt mode. Since that is no longer a problem, this
can now go in.This patch:
Start getting rid of tt mode support.
This patch throws out CONFIG_MODE_TT and all config options, code, and files
which depend on it.CONFIG_MODE_SKAS is gone and everything that depends on it is included
unconditionally.The few changed lines are in re-written Kconfig help, lines which needed
something skas-related removed from them, and a few more which weren't
strictly deletions.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On some systems, with IPV6 configured, there is a clash between the kernel's
in6addr_any and the one in libc.This is handled in the usual (gross) way of defining the kernel symbol out of
the way on the gcc command line.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Oct, 2007
1 commit
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The variable AFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.This patch replace use of AFLAGS with KBUILD_AFLAGS all over
the tree.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390Signed-off-by: Sam Ravnborg
15 Oct, 2007
1 commit
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The variable CFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
tree and enabling one to use:
make CFLAGS=...
to specify additional gcc commandline options.One usecase is when trying to find gcc bugs but other
use cases has been requested too.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68kTest was simple to do a defconfig build, apply the patch and check
that nothing got rebuild.Signed-off-by: Sam Ravnborg
14 Oct, 2007
1 commit
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a) include/asm-um/arch can't just point to include/asm-$(SUBARCH) now
b) arch/{i386,x86_64}/crypto are merged now
c) subarch-obj needed changes
d) cpufeature_64.h should pull "cpufeature_32.h", not
since it can be included from asm-um/cpufeature.h
e) in case of uml-i386 we need CONFIG_X86_32 for make and gcc, but not
for Kconfig
f) sysctl.c shouldn't do vdso_enabled for uml-i386 (actually, that one
should be registered from corresponding arch/*/kernel/*, with ifdef
going away; that's a separate patch, though).With that and with Stephen's patch ("[PATCH net-2.6] uml: hard_header fix")
we have uml allmodconfig building both on i386 and amd64.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
20 Jul, 2007
1 commit
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Change in 'kbuild: do section mismatch check on full vmlinux'
should've been replicated in arch/um/Makefile.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
31 Oct, 2006
1 commit
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From: Jeff Dike , Paolo Giarrusso
Make sure that when compiling USER_OBJS the correct compilation options are
passed; since they are compiled with USER_CFLAGS which is derived from
CFLAGS, make sure it is a recursively evaluated variable, so that changes
to CFLAGS done afterwards the inclusion of arch/$(ARCH)/Makefile are
reflected in USER_CFLAGS.For instance, without this patch userspace objects are never compiled with
debug info active.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Oct, 2006
1 commit
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The patch below corrects multiple occurances of "the the"
typos across several files, both in source comments and KConfig files.
There is no actual code changed, only text. Note this only affects the /arch
directory, and I believe I could find many more elsewhere. :)Signed-off-by: Adrian Bunk
02 May, 2006
3 commits
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Blaisorblade's uml-makefile-nicer makes a V=0 build say SYMLINK where
what's happening is really a LINK.Signed-off-by: Jeff Dike
Acked-by: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
To make some half-assembly stubs compile, disable various "hardened" GCC
features:*) we can't make it build PIC code as we need %ebx to do syscalls and GCC
wants it free for PIC*) we can't leave stack protection as the stub is moved (not relocated!) in
memory so the RIP-relative access to the canary tries reading from an
unmapped address and causes a segfault, since we move the stub of various
megabytes (the exact amount will be decided at runtime) away from the
link-time address.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Acked-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move the build of user-offsets to arch/um/sys-$(SUBARCH), where it's located.
So we can also build it via Kbuild with its dependency tracking rather than by
hand. While hacking here, fix also a lot of little cosmetic things.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Acked-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Apr, 2006
1 commit
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Parallel make failed once for me - fix this by adding the appropriate command
(mkdir before creating a link in that dir).Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Acked-by: Sam Ravnborg
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Apr, 2006
3 commits
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ldt-{i386,x86_64}.h is made of two different parts - some code for parsing of
LDT descriptors, which is arch-dependant, and the code to handle uml_ldt_t (an
LDT block inside UML), which is mostly arch-independant (among x86 and x86_64,
at least).Join the common part in a single file (ldt.h) and split the rest away
(host_ldt-{i386,x86_64}.h).This is needed because processor.h, with next patches, will start including
the LDT descriptor parsing macros in host_ldt.h, but it can't include ldt.h
because it uses semaphores (and to define semaphores one must first include
processor.h!).Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Acked-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
no need to add the same file twice to MRPROPER_FILES
Signed-off-by: Al Viro
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kills unmap magic
Signed-off-by: Al Viro
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Mar, 2006
1 commit
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The kbuild system takes advantage of an incorrect behavior in GNU make.
Once this behavior is fixed, all files in the kernel rebuild every time,
even if nothing has changed. This patch ensures kbuild works with both
the incorrect and correct behaviors of GNU make.For more details on the incorrect behavior, see:
http://lists.gnu.org/archive/html/bug-make/2006-03/msg00003.html
Changes in this patch:
- Keep all targets that are to be marked .PHONY in a variable, PHONY.
- Add .PHONY: $(PHONY) to mark them properly.
- Remove any $(PHONY) files from the $? list when determining whether
targets are up-to-date or not.Signed-off-by: Paul Smith
Signed-off-by: Sam Ravnborg
02 Feb, 2006
2 commits
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While fixing myself the mktime conflict (which someone already merged), I also
improved a few comments. Merge them up.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kern_constants.h now depends on arch/um/include to make sure it exists
before we try to create symlinks in it.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Jan, 2006
1 commit
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The serial UML OS-abstraction layer patch (um/kernel dir).
This moves skas headers to arch/um/include.
Signed-off-by: Gennady Sharapov
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Jan, 2006
1 commit
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LD .tmp_vmlinux1
/usr/lib/gcc-lib/i486-linux/3.3.4/../../../libc.a(mktime.o): In function `timelocal':
: multiple definition of `mktime'
kernel/built-in.o:kernel/time.c:604: first defined here
/usr/bin/ld: Warning: size of symbol `mktime' changed from 134 in kernel/built-in.o to 44 in /usr/lib/gcc-lib/i486-linux/3.3.4/../../../libc.a(mktime.o)
collect2: ld returned 1 exit statusSigned-off-by: Miklos Szeredi
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Jan, 2006
1 commit
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2.6.15-mm1 caused kernel-offsets.c to stop compiling with a syntax error in a
header. The problem was with KBUILD_BASENAME, which didn't get a definition
with the by-hand compilation in the main UML Makefile.This was OK before since the expansion was syntactically the same as the
KBUILD_BASENAME token. With -mm1, the expansion is now a quote-delimited
string, so there needs to be a definition of it.Since kernel-offsets.c is basically the same as other arches' asm-offsets.c,
and those seem to build OK, this patch turns kernel-offsets.c into
asm-offsets.c. kernel-offsets.c is in arch/um/sys-$(SUBARCH), i.e. sys-i386
and sys-x86_64, while kbuild expects it to be in arch/um/kernel.
kernel-offsets.c is moved to
arch/um/include/sysdep-$(SUBARCH)/kernel-offsets.h, which is included by
arch/um/kernel/asm-offsets.c. With that, include/asm-um/asm-offsets.h is
generated automatically. kernel-offsets.h continues to exist because it needs
to be accessible to userspace UML code, and include/asm-um isn't. So, a
symlink is made from arch/um/include/kernel-offsets.h to
include/asm-um/asm-offsets.h.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Nov, 2005
1 commit
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This gives a name to the anonymous union introduced in skas-hold-own-ldt,
allowing to build on a wider range of gccs.It also removes ldt.h, which somehow became real, and replaces it with a
symlink, and creates ldt-x86_64.h as a copy of ldt-i386.h for now.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Nov, 2005
1 commit
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A number of fixes to improve behavior when large physical memory sizes
are specified:- libc files need -D_FILE_OFFSET_BITS=64 because there are unavoidable uses
of non-64 interfaces in libc- some %d need to be %u
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Oct, 2005
1 commit
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Add a missing $(Q) to a "ln" invocation.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Linus Torvalds
29 Sep, 2005
1 commit
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UML makefiles sanitized:
- number of generated headers reduced to 2 (from user-offsets.c and
kernel-offsets.c resp.). The rest is made constant and simply
includes those two.
- mk_... helpers are gone now that we don't need to generate these
headers
- arch/um/include2 removed since everything under arch/um/include/sysdep
is constant now and symlink can point straight to source tree.
- dependencies seriously simplified.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
22 Sep, 2005
1 commit
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gcc is now complaining during link on some hosts - fix it as for other things.
Reported by Antoine Martin .Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Linus Torvalds
12 Sep, 2005
1 commit
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When introducing the generic asm-offsets.h support the dependency
chain for the prepare targets was changed. All build scripts expecting
include/asm/asm-offsets.h to be made when using the prepare target would broke.
With the limited number of prepare targets left in arch Makefiles
the trivial solution was to introduce a new arch specific target: archprepareThe dependency chain looks like this now:
prepare
|
+--> prepare0
|
+--> archprepare
|
+--> scripts_basic
+--> prepare1
|
+---> prepare2
|
+--> prepare3So prepare 3 is processed before prepare2 etc.
This guaantees that the asm symlink, version.h, scripts_basic
are all updated before archprepare is processed.prepare0 which build the asm-offsets.h file will need the
actions performed by archprepare.The head target is now named prepare, because users scripts will most
likely use that target, but prepare-all has been kept for compatibility.
Updated Documentation/kbuild/makefiles.txt.Signed-off-by: Sam Ravnborg
11 Sep, 2005
1 commit
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We must remove even arch/um/os-Linux/util/mk_user_constants, which we don't do.
Also, Kconfig_arch must be listed only once, between CLEAN_FILES.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Linus Torvalds