- 13 7月, 2012 5 次提交
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由 Rich Felker 提交于
the kernel wrongly expects the cmsg length field to be size_t instead of socklen_t. in order to work around the issue, we have to impose a length limit and copy to a local buffer. the length limit should be more than sufficient for any real-world use; these headers are only used for passing file descriptors and permissions between processes over unix sockets.
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由 Rich Felker 提交于
this fix is easier than trying to reorder the header stuff
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由 Rich Felker 提交于
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由 Rich Felker 提交于
signal handling was very broken because of this
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由 Rich Felker 提交于
like arm, mips requires 64-bit arguments to be "aligned" on an even register boundary.
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- 12 7月, 2012 9 次提交
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由 Rich Felker 提交于
these could have caused memory corruption due to invalid accesses to the next field. all should be fixed now; I found the errors with fgrep -r '__lock(&', which is bogus since the argument should be an array.
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由 Rich Felker 提交于
it had not been updated for the futex-based locks
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由 Rich Felker 提交于
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由 Rich Felker 提交于
otherwise offs in ucontext_t will be wrong, and break code that inspects or modifies the signal makes (including cancellation code).
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由 Rich Felker 提交于
after the thread unmaps its own stack/thread structure, the kernel, performing child tid clear and futex wake, could clobber a new mapping made at the same location as the just-removed thread's tid field. disable kernel clearing of child tid to prevent this.
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由 Rich Felker 提交于
the mips abi reserves stack space equal to the size of the in-register args for the callee to save the args, if desired. this would cause the beginning of the thread structure to be clobbered...
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由 Rich Felker 提交于
the old code worked in qemu app-level emulation, but not on real kernels where the clone syscall does not copy the register values to the new thread. save arguments on the new thread stack instead.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
with this change, threads on mips seem to be working
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- 11 7月, 2012 9 次提交
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由 Rich Felker 提交于
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由 Rich Felker 提交于
on other archs, like x86[_64], asm version is required
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由 Rich Felker 提交于
basically, this version of the code was obtained by starting with rdp's work from his ellcc source tree, adapting it to musl's build system and coding style, auditing the bits headers for discrepencies with kernel definitions or glibc/LSB ABI or large file issues, fixing up incompatibility with the old binutils from aboriginal linux, and adding some new special cases to deal with the oddities of sigaction and pipe syscall interfaces on mips. at present, minimal test programs work, but some interfaces are broken or missing. threaded programs probably will not link.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
the type doesn't actually matter, just the size, but it's nice to be consistent...
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由 Rich Felker 提交于
this file can be overridden by a same-named file in an arch dir.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
if libc.a is compiled PIC for use in static PIE code, this should not cause the dynamic linker (which still does not support static-linked main program) to be built into libc.a.
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由 Rich Felker 提交于
most importantly, the name for such libs was being set from an uninitialized buffer. also, shortname always had an initial '/' character, making it useless for looking up already-loaded libraries by name, and thus causing repeated searches through the library path. major changes now: - shortname is the base name for library lookups with no explicit pathname. it's initially clear for libraries loaded with an explicit pathname (and for the main program), but will be set if the same library (detected via inodes match) is later found by a search. - exact name match is never used to identify libraries loaded with an explicit pathname. in this case, there's no explicit search, so we can just stat the file and check for inode match.
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- 10 7月, 2012 2 次提交
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由 Rich Felker 提交于
apparently somebody wants this for something... and it doesn't hurt.
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由 Rich Felker 提交于
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- 09 7月, 2012 1 次提交
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由 Rich Felker 提交于
no need to pass zero for unused arguments; just omit them.
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- 08 7月, 2012 2 次提交
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由 Rich Felker 提交于
this hidden endian dependency had left big endian arm badly broken.
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由 Rich Felker 提交于
previously this was being handled the same as a library-specific, dependency-order lookup on the next library in the global chain, which is likely to be utterly meaningless. instead the lookup needs to be in the global namespace, but omitting the initial portion of the global library chain up through the calling library.
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- 05 7月, 2012 3 次提交
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由 Rich Felker 提交于
this is not a standard but it's the traditional behavior and it's more useful because the caller can reliably detect errors.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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- 04 7月, 2012 2 次提交
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由 Rich Felker 提交于
this option is expensive and only used on old gcc's that lack -fexcess-precision=standed, but it's not needed on non-i386 archs where floating point does not have excess precision anyway. if musl ever supports m68k, i think it will need to be special-cased too. i'm not aware of any other archs with excess precision.
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由 Rich Felker 提交于
on arm, the location of the saved-signal-mask flag and mask were off by one between sigsetjmp and siglongjmp, causing incorrect behavior restoring the signal mask. this is because the siglongjmp code assumed an extra slot was in the non-sig jmp_buf for the flag, but arm did not have this. now, the extra slot is removed for all archs since it was useless. also, arm eabi requires jmp_buf to have 8-byte alignment. we achieve that using long long as the type rather than with non-portable gcc attribute tags.
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- 03 7月, 2012 4 次提交
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由 Rich Felker 提交于
no idea why gcc refuses to compile the C code to use a tail call, but it's best to use asm anyway so we don't have to rely on the quality of the compiler's optimizations for correct code.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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由 Rich Felker 提交于
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- 29 6月, 2012 1 次提交
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由 Rich Felker 提交于
the new version is largely the work of Solar Designer, with minor changes for integration with musl. compared to the old code, text size is reduced by about 7k, stack space usage by about 70k, and performance is greatly improved by avoiding expensive calculation of constant tables on each run. this version also adds support for extended des-based password hashes, which allow for unlimited key (password) length and configurable iteration counts. i've also published the interface for crypt_r in a new crypt.h header. especially since this is not a standard interface, i did not feel compelled to match the glibc abi for the crypt_data structure. the glibc structure is way too big to allocate on the stack; in fact it's so big that the first usage may cause the main thread to exceed its pre-committed stack size of 128k and thus could cause the program to crash even on systems with overcommit disabled. the only legitimate use of crypt_data for crypt_r is to store the hash string to return, so i've reserved 256 bytes, which should be more than sufficient (longest known password hashes are ~60 characters, and beyond that is possibly even exceeding some implementations' passwd file field size limit).
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- 26 6月, 2012 1 次提交
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由 Rich Felker 提交于
lr must be saved because init/fini-section code from the compiler clobbers it. this was not a problem when i tested without gcc's crtbegin/crtend files present, but with them, musl on arm fails to work (infinite loop in _init).
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- 25 6月, 2012 1 次提交
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由 Rich Felker 提交于
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