Changes in vdso

6eda706a - selftests: vDSO: fix the way vDSO functions are called for powerpc

Fri, 30 Aug 2024 12:28:38 +0000

selftests: vDSO: fix the way vDSO functions are called for powerpcvdso_test_correctness test fails on powerpc:~ # ./vdso_test_correctness...[RUN] Testing clock_gettime for clock CLOCK_REALTIME_ALARM (8)...[FAIL] No such clock, but __vdso_clock_gettime returned 22[RUN] Testing clock_gettime for clock CLOCK_BOOTTIME_ALARM (9)...[FAIL] No such clock, but __vdso_clock_gettime returned 22[RUN] Testing clock_gettime for clock CLOCK_SGI_CYCLE (10)...[FAIL] No such clock, but __vdso_clock_gettime returned 22...[RUN] Testing clock_gettime for clock invalid (-1)...[FAIL] No such clock, but __vdso_clock_gettime returned 22[RUN] Testing clock_gettime for clock invalid (-2147483648)...[FAIL] No such clock, but __vdso_clock_gettime returned 22[RUN] Testing clock_gettime for clock invalid (2147483647)...[FAIL] No such clock, but __vdso_clock_gettime returned 22On powerpc, a call to a VDSO function is not an ordinary C functioncall. Unlike several architectures which returns a negative error codein case of an error, powerpc sets CR[SO] and returns the error codeas a positive value.Define and use a macro called VDSO_CALL() which takes a pointerto the function to call, the number of arguments and the arguments.Also update ABI vdso documentation to reflect this subtlety.Provide a specific version of VDSO_CALL() for powerpc that negatesthe error code on return when CR[SO] is set.Fixes: c7e5789b24d3 ("kselftest: Move test_vdso to the vDSO test suite")Fixes: 2e9a97256616 ("selftests: vdso: Add a selftest for vDSO getcpu()")Fixes: 693f5ca08ca0 ("kselftest: Extend vDSO selftest")Fixes: b2f1c3db2887 ("kselftest: Extend vdso correctness test to clock_gettime64")Fixes: 4920a2590e91 ("selftests/vDSO: add tests for vgetrandom")Signed-off-by: Christophe Leroy Acked-by: Shuah Khan Signed-off-by: Jason A. Donenfeld List of files: /linux-6.15/Documentation/ABI/stable/vdso

97f26cab - docs: ABI: vdso: use the right format for ABI

Fri, 30 Oct 2020 07:40:48 +0000

docs: ABI: vdso: use the right format for ABIThis ABI is not following the format described at ABI/README.Use it, filling in the blanks with the git log that added it,and using the current e-mail from Andy.Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/28c7cf3a71e15fb7499b70ec8f38c2efaaf4add2.1604042072.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/Documentation/ABI/stable/vdso

98913408 - docs: ABI: stable: make files ReST compatible

Fri, 30 Oct 2020 07:40:38 +0000

docs: ABI: stable: make files ReST compatibleSeveral entries at the stable ABI files won't parse if we passthem directly to the ReST output.Adjust them, in order to allow adding their contents as-is atthe stable ABI book.Acked-by: Srinivas Kandagatla Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/467a0dfbcdf00db710a629d3fe4a2563750339d8.1604042072.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/Documentation/ABI/stable/vdso

904d94f0 - doc: ABI: vdso: update parse_vdso.c reference

Wed, 08 Mar 2017 19:50:31 +0000

doc: ABI: vdso: update parse_vdso.c referenceSince commit f9b6b0ef603 ("selftests: move vDSO tests from Documentation/vDSO")parse_vdso.c moved under selftests. Update the reference to match.Cc: Jonathan Corbet Signed-off-by: Baruch Siach Signed-off-by: Jonathan Corbet List of files: /linux-6.15/Documentation/ABI/stable/vdso

79980d9c - [media] Documentation: Add newline at end-of-file to files lacking one

Fri, 20 Jul 2012 19:35:17 +0000

[media] Documentation: Add newline at end-of-file to files lacking oneThis patch simply adds a newline character at end-of-file to thosefiles in Documentation/ that currently lack one.This is done for a few different reasons:A) It's rather annoying when you do "cat some_file.txt" that your prompt/cursor ends up at the end of the last line of output rather than on a new line.B) Some tools that process files line-by-line may get confused by the lack of a newline on the last line.C) The "\ No newline at end of file" line in diffs annoys me for some reason.So, let's just add the missing newline once and for all.Signed-off-by: Jesper Juhl Signed-off-by: Mauro Carvalho Chehab List of files: /linux-6.15/Documentation/ABI/stable/vdso

f9028317 - Documentation: Add newline at end-of-file to files lacking one

Fri, 20 Jul 2012 20:35:17 +0000

Documentation: Add newline at end-of-file to files lacking oneThis patch simply adds a newline character at end-of-file to thosefiles in Documentation/ that currently lack one.This is done for a few different reasons:A) It's rather annoying when you do "cat some_file.txt" that your prompt/cursor ends up at the end of the last line of output rather than on a new line.B) Some tools that process files line-by-line may get confused by the lack of a newline on the last line.C) The "\ No newline at end of file" line in diffs annoys me for some reason.So, let's just add the missing newline once and for all.Signed-off-by: Jesper Juhl Signed-off-by: Jiri Kosina List of files: /linux-6.15/Documentation/ABI/stable/vdso

98eedc3a - Document the vDSO and add a reference parser

Wed, 13 Jul 2011 13:24:16 +0000

Document the vDSO and add a reference parserIt turns out that parsing the vDSO is nontrivial if you don't alreadyhave an ELF dynamic loader around. So document it in Documentation/ABIand add a reference CC0-licenced parser.This code is dedicated to Go issue 1933:http://code.google.com/p/go/issues/detail?id=1933Signed-off-by: Andy Lutomirski Link: http://lkml.kernel.org/r/a315a9514cd71bcf29436cc31e35aada21a5ff21.1310563276.git.luto@mit.eduSigned-off-by: H. Peter Anvin List of files: /linux-6.15/Documentation/ABI/stable/vdso