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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-01-15 19:39:56 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-01-17 06:36:33 -0800 |
| commit | 1c9a233a5205389dc89208ed652bf62dfb969eca (patch) | |
| tree | 8865659751127364945e1f6a4b70a95f33573fee /bits/byteswap.h | |
| parent | f24c345bf5486cc8d659f7a17463adcae402ec8e (diff) | |
| download | glibc-hjl/pr22715/2.24.tar.gz glibc-hjl/pr22715/2.24.tar.xz glibc-hjl/pr22715/2.24.zip | |
x86-64: Properly align La_x86_64_retval to VEC_SIZE [BZ #22715] hjl/pr22715/2.24
_dl_runtime_profile calls _dl_call_pltexit, passing a pointer to La_x86_64_retval which is allocated on stack. The lrv_vector0 field in La_x86_64_retval must be aligned to size of vector register. When allocating stack space for La_x86_64_retval, we need to make sure that the address of La_x86_64_retval + RV_VECTOR0_OFFSET is aligned to VEC_SIZE. This patch checks the alignment of the lrv_vector0 field and pads the stack space if needed. Tested with x32 and x86-64 on SSE4, AVX and AVX512 machines. It fixed FAIL: elf/tst-audit10 FAIL: elf/tst-audit4 FAIL: elf/tst-audit5 FAIL: elf/tst-audit6 FAIL: elf/tst-audit7 on x32 AVX512 machine. (cherry picked from commit 207a72e2988c6d6343f50fe0128eb4fc4edfdd15) [BZ #22715] * sysdeps/x86_64/dl-trampoline.h (_dl_runtime_profile): Properly align La_x86_64_retval to VEC_SIZE.
Diffstat (limited to 'bits/byteswap.h')
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