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Better definition of the *_NITSET macros.
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After a recent change to fix CFI in ____longjmp_chk the test of the
ss_flags used the wrong memory location.
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This patch adds multiarch support when configured for i686. I modified
some x86-64 functions to support 32bit. I will contribute 32bit SSE string
and memory functions later.
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obstack calls several callbacks, so on i?86 it'd better be compiled
without -mpreferred-stack-boundary=2, otherwise the callbacks are called
with misaligned stack.
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All other i386 ports need to provide their own versions.
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We use sigaltstack internally which on some systems is a syscall
and should be used as such. Move the x86-64 version to the Linux
specific directory and create in its place a file which always
causes compile errors.
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The simple test previously used might trigger if the longjmp jumps
from the signal stack to the normal stack. We now explicitly test
for this case.
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Use it to implement fma and fmaf, if possible.
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We use a callback function into libc.so to get access to the data
structure with the information and have special versions of the test
macros which automatically use this function.
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tst-audit4 and tst-audit5 fail under AVX emulator due to je instead of
jne. This patch fixes them.
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SSE registers are used for passing parameters and must be preserved
in runtime relocations. This is inside ld.so enforced through the
tests in tst-xmmymm.sh. But the malloc routines used after startup
come from libc.so and can be arbitrarily complex. It's overkill
to save the SSE registers all the time because of that. These calls
are rare. Instead we save them on demand. The new infrastructure
put in place in this patch makes this possible and efficient.
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This reverts commit 7b7f43bed134db6a0da34282fffcbf0af10d4613.
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The test now takes the callgraph into account. Only code called
during runtime relocation is affected by the limitation. We now
determine the affected object files as closely as possible from
the outside. This allowed to remove some the specializations
for some of the string functions as they are only used in other
code paths.
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This reduces the coarse static callgraph that can be discovered by
looking at the object files.
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There were several issues when the initial 31 entries hashtab filled up.
size * 3 <= tab->n_elements is always false, table can't have more elements
than its size. I assume from libiberty/hashtab.c this meant to be check for
3/4 full. Even after fixing that, _dl_higher_prime_number (31) apparently
returns 31, only _dl_higher_prime_number (32) returns 61. And, size
variable wasn't updated during reallocation, which means during reallocation
the insertion of the new entry was done into a wrong spot.
All this lead to a hang in ld.so, because a search with n_elements 31 size
31 wouldn't ever terminate.
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This patch introduces a test to make sure no function modifies the
xmm/ymm registers. With the exception of the auditing functions.
The test is probably too pessimistic. All code linked into ld.so
is checked. Perhaps at some point the callgraph starting from
_dl_fixup and _dl_profile_fixup is checked and we can start using
faster SSE-using functions in parts of ld.so.
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All commits should have happened before the mutex lock is taken.
Therefore use the _rel variant of the cmpxchg atomic op.
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When doing IPv4+6 lookups we have to pass up the error record from
send_dg.
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getaddrinfo didn't update the status variable in that round of the
loop if no callback was used.
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The file contained some code which was never used. Don't compile it
in.
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Ever since the /usr/include/linux headers got cleaned up this isn't
necessary. Meanwhile everybody should have these cleanups.
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We need this support in NPTL now to avoid the hand-coded tables.
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