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2014-06-12x86/vdso/doc: Make vDSO examples more portableAndy Lutomirski3-41/+123
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 <stefani@seibold.net> Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/62b701fc44b79f118ac2b2d64d19965fc5c291fb.1402620737.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2014-06-12x86/vdso/doc: Rename vdso_test.c to vdso_standalone_test_x86.cAndy Lutomirski1-1/+1
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 <luto@amacapital.net> Link: http://lkml.kernel.org/r/3efc170e0e166e15f0150c9fdb37d52488b9c0a4.1402620737.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2011-07-14Document the vDSO and add a reference parserAndy Lutomirski2-0/+367
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 <luto@mit.edu> Link: http://lkml.kernel.org/r/a315a9514cd71bcf29436cc31e35aada21a5ff21.1310563276.git.luto@mit.edu Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>