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6eda706a53
vdso_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 22 On powerpc, a call to a VDSO function is not an ordinary C function call. Unlike several architectures which returns a negative error code in case of an error, powerpc sets CR[SO] and returns the error code as a positive value. Define and use a macro called VDSO_CALL() which takes a pointer to 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 negates the error code on return when CR[SO] is set. Fixes: |
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