linux-toradex.git/Documentation/vDSO, branch v4.4.8

Documentation/vDSO: don't build tests when cross compiling

2015-06-22T22:04:57+00:00

The following was seen in linux-next build coverage, which is somewhat
unique since it uses powerpc host to cross compile x86:

Documentation/vDSO/vdso_standalone_test_x86.c:49:2: error: impossible
register constraint in 'asm'
make[4]: *** [Documentation/vDSO/vdso_standalone_test_x86.o] Error 1

It probably makes sense to just skip building these tests when
we are cross compiling.

Cc: Jonathan Corbet 
Cc: linux-doc@vger.kernel.org
Cc: Andy Lutomirski 
Signed-off-by: Paul Gortmaker 
Signed-off-by: Jonathan Corbet

vdso: don't require 64-bit math in standalone test

2014-10-25T14:53:44+00:00

The use of 64-bit math on i386 causes build failures:
vdso_standalone_test_x86.c:(.text+0x101): undefined reference to `__umoddi3'
vdso_standalone_test_x86.c:(.text+0x12d): undefined reference to `__udivdi3'

Commit adb19fb66ee (Documentation: add makefiles for more targets) is
now building this by default, so it's failing the kernel build entirely.

Switching the declaration from uint64_t to time_t does the right thing
and handles the x32 case automatically.

Signed-off-by: Jeff Mahoney 
Acked-by: Peter Foley 
Signed-off-by: Jonathan Corbet

Documentation: fix vdso_standalone_test_x86 on 32-bit

2014-10-21T14:44:26+00:00

vdso_standalone_test_x86 needs -lgcc_s to build succesfully on 32bit.

Signed-off-by: Peter Foley 
[ Fixed missing separator issue reported by Paul Bolle  ]
Signed-off-by: Jonathan Corbet

Documentation: disable vdso_test to avoid breakage with old glibc

2014-09-26T09:03:00+00:00

glibc versions older than 2.16 don't include sys/auxv.h which this
executable uses.
Since we don't have a good way to test for specific glibc versions in
kbuild, just disable it for now.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: update vDSO makefile to build portable examples

2014-09-26T09:03:00+00:00

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: update .gitignore files

2014-09-26T09:02:59+00:00

Add some missing files to .gitignore.
Push Documentation/.gitignore down into subdirectories.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: add makefiles for more targets

2014-09-26T09:02:56+00:00

Add a bunch of previously unbuilt source files to the Documentation build
machinery.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

x86/vdso/doc: Make vDSO examples more portable

2014-06-13T02:01:24+00:00

This adds a new vdso_test.c that's written entirely in C.  It also
makes all of the vDSO examples work on 32-bit x86.

Cc: Stefani Seibold 
Signed-off-by: Andy Lutomirski 
Link: http://lkml.kernel.org/r/62b701fc44b79f118ac2b2d64d19965fc5c291fb.1402620737.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin

x86/vdso/doc: Rename vdso_test.c to vdso_standalone_test_x86.c

2014-06-13T02:01:16+00:00

This thing is hopelessly x86_64-specific: it's an example of how to
access the vDSO without any runtime support at all.

Signed-off-by: Andy Lutomirski 
Link: http://lkml.kernel.org/r/3efc170e0e166e15f0150c9fdb37d52488b9c0a4.1402620737.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin

Document the vDSO and add a reference parser

2011-07-15T00:57:09+00:00

It turns out that parsing the vDSO is nontrivial if you don't already
have an ELF dynamic loader around.  So document it in Documentation/ABI
and add a reference CC0-licenced parser.

This code is dedicated to Go issue 1933:
http://code.google.com/p/go/issues/detail?id=1933

Signed-off-by: Andy Lutomirski 
Link: http://lkml.kernel.org/r/a315a9514cd71bcf29436cc31e35aada21a5ff21.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin