- 11 12月, 2012 2 次提交
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由 Rich Felker 提交于
this bug seems to have caused any failure by pipe2 on such systems to set errno to 1, rather than the proper error code.
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由 Rich Felker 提交于
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- 08 12月, 2012 4 次提交
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由 Rich Felker 提交于
this change fixes an obscure issue with some nonstandard kernels, where the initial brk syscall returns a pointer just past the end of bss rather than the beginning of a new page. in that case, the dynamic linker has already reclaimed the space between the end of bss and the page end for use by malloc, and memory corruption (allocating the same memory twice) will occur when malloc again claims it on the first call to brk.
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由 Rich Felker 提交于
if there's evidence of any use for it, we can add it back later. as far as I can tell, glibc has it only for internal use (and musl uses a direct syscall in that case rather than a function call), not for exposing it to applications.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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- 07 12月, 2012 8 次提交
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由 Rich Felker 提交于
in case of mmap-obtained chunks, end points past the end of the mapping and reading it may fault. since the value is not needed until after the conditional, move the access to prevent invalid reads.
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由 rofl0r 提交于
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由 rofl0r 提交于
that way it's consistent with existing sig* functions, and saves some code size.
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由 rofl0r 提交于
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由 rofl0r 提交于
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由 rofl0r 提交于
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由 rofl0r 提交于
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由 rofl0r 提交于
this function is obsolete, however it's available as a syscall and as such qemu userspace emulation tries to forward it to the host kernel.
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- 06 12月, 2012 2 次提交
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由 Rich Felker 提交于
the issue is identical to the recent commit fixing the mips versions: despite other implementations doing this, it conflicts with the requirements of ISO C and it's a waste of time and code size.
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由 Rich Felker 提交于
nothing in the standard requires or even allows the fenv state to be restored by longjmp. restoring the exception flags is not such a big deal since it's probably valid to clobber them completely, but restoring the rounding mode yields an observable side effect not sanctioned by ISO C. saving/restoring it also wastes a few cycles and 16 bytes of code. as for historical behavior, reportedly SGI IRIX did save/restore fenv, and this is where glibc and uClibc got the behavior from. a few other systems save/restore it too (on archs other than mips), even though this is apparently wrong. further details are documented here: http://www-personal.umich.edu/~williams/archive/computation/setjmp-fpmode.html as musl aims for standards conformance rather than coddling historical programs expecting non-conforming behavior, and as it's unlikely that any historical programs actually depend on the incorrect behavior (such programs would break on other archs, anyway), I'm making the change not to save/restore fenv on mips.
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- 05 12月, 2012 1 次提交
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由 Rich Felker 提交于
for some reason I have not been able to determine, gcc 3.2 rejects the array notation. this seems to be a gcc bug, but since it's easy to work around, let's do the workaround and avoid gratuitously requiring newer compilers.
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- 01 12月, 2012 1 次提交
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由 Rich Felker 提交于
previously, shared library constructors were being called before important internal things like the environment (extern char **environ) and hwcap flags (needed for sjlj to work right with float on arm) were initialized in __libc_start_main. rather than trying to have to dynamic linker make sure this stuff all gets initialized right, I've opted to just defer calling shared library constructors until after the main program's entry point is reached. this also fixes the order of ctors to be the exact reverse of dtors, which is a desirable property and possibly even mandated by some languages. the main practical effect of this change is that shared libraries calling getenv from ctors will no longer fail.
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- 27 11月, 2012 1 次提交
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由 Rich Felker 提交于
these should have little/no practical impact but they're needed for strict conformance.
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- 26 11月, 2012 1 次提交
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由 Rich Felker 提交于
actually, the hard-coded name should be eliminated too, and replaced by a search for the soname in the headers, but that can be done separately later.
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- 24 11月, 2012 2 次提交
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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- 19 11月, 2012 5 次提交
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由 rofl0r 提交于
sigsetjmp: store temporaries in jmp_buf rather than on stack.
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由 Rich Felker 提交于
it's essential to decrement the stack pointer before writing to new stack space, rather than afterwards. otherwise there is a race condition during which asynchronous code (signals) could clobber the data being stored. it may be possible to optimize the code further using stwu, but I wanted to avoid making any changes to the actual stack layout in this commit. further improvements can be made separately if desired.
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由 Rich Felker 提交于
based on proposal by Isaac Dunham. nonexistance of bits/io.h will cause inclusion of sys/io.h to produce an error on archs that are not supposed to have it. this is probably the desired behavior, but the error message may be a bit unusual.
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由 Rich Felker 提交于
based on code sent to the mailing list by nsz, with minor changes.
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由 Rich Felker 提交于
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- 18 11月, 2012 8 次提交
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由 Szabolcs Nagy 提交于
use the 'f' suffix when a float constant is not representable
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由 Szabolcs Nagy 提交于
raise overflow and underflow when necessary, fix various comments.
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由 Szabolcs Nagy 提交于
similar to exp.c cleanup: use scalbnf, don't return excess precision, drop some optimizatoins. exp.c was changed to be more consistent with expf.c code.
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由 Rich Felker 提交于
fortunately the memory corruption could not hurt anything, but it prevented clearing the final newline and thus prevented the last path element from working.
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由 Rich Felker 提交于
priority inheritance is not yet supported, and priority protection probably will not be supported ever unless there's serious demand for it (it's a fairly heavy-weight feature). per-thread cpu clocks would be nice to have, but to my knowledge linux is still not capable of supporting them. glibc fakes them by using the _process_ cpu-time clock and subtracting the thread creation time, which gives seriously incorrect semantics (worse than not supporting the feature at all), so until there's a way to do it right, it will remain as a stub that always fails.
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由 Szabolcs Nagy 提交于
* old code relied on sign extension on right shift * exp2l ld64 wrapper was wrong * use scalbn instead of bithacks
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由 Rich Felker 提交于
this allows using the dynamic linker as a command to load programs.
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由 Szabolcs Nagy 提交于
overflow and underflow was incorrect when the result was not stored. an optimization for the 0.5*ln2 < |x| < 1.5*ln2 domain was removed. did various cleanups around static constants and made the comments consistent with the code.
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- 17 11月, 2012 1 次提交
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由 Rich Felker 提交于
incomplete but at least partly working. requires all files to be compiled in the new "secure" plt model, not the old one that put plt code in the data segment. TLS is untested but may work. invoking the dynamic linker explicitly to load a program does not yet handle argv correctly.
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- 15 11月, 2012 1 次提交
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由 Rich Felker 提交于
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- 14 11月, 2012 3 次提交
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由 Szabolcs Nagy 提交于
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由 Szabolcs Nagy 提交于
keeping only commonly used data in invtrigl
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由 Szabolcs Nagy 提交于
this also fixes overflow/underflow raising and excess precision issues (as those are handled well in scalbn)
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