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* add protocol families PF_IB and PF_VSOCK to socket.hSzabolcs Nagy2013-07-251-1/+5
| | | | | | | | linux commit 8d36eb01da5d371feffa280e501377b5c450f5a5 (2013-05-29) added PF_IB for InfiniBand linux commit d021c344051af91f42c5ba9fdedc176740cbd238 (2013-02-06) added PF_VSOCK for VMware sockets
* update siginfo according to linux headersSzabolcs Nagy2013-07-241-1/+13
| | | | | | | | linux commit a0727e8ce513fe6890416da960181ceb10fbfae6 (2012-04-12) added siginfo fields for SIGSYS (seccomp uses it) linux commit ad5fa913991e9e0f122b021e882b0d50051fbdbc (2009-09-16) added siginfo field and si_code values for SIGBUS (hwpoison signal)
* rework langinfo code for ABI compat and for use by time codeRich Felker2013-07-244-17/+17
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* update strxfrm/wcsxfrm for future LC_COLLATE support and ABI compatRich Felker2013-07-244-14/+20
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* add ABI compat aliases for a number of locale_t functionsRich Felker2013-07-248-0/+24
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* add PTRACE_PEEKSIGINFO to ptrace.hSzabolcs Nagy2013-07-241-0/+11
| | | | | added in linux-v3.10 commit 84c751bd4aebbaae995fe32279d3dba48327bad4 using stdint.h types for the new ptrace_peeksiginfo_args struct
* add if_ether.h constants ETH_P_802_3_MIN and ETH_P_BATMANSzabolcs Nagy2013-07-241-0/+3
| | | | | see linux commits 4f99ad51292078cc47343c17d3870764588cff73 and e5c5d22e8dcf7c2d430336cbf8e180bd38e8daf1
* add CLOCK_TAI (and CLOCK_SGI_CYCLE) clock ids to time.hSzabolcs Nagy2013-07-241-0/+2
| | | | added in linux-v3.10 commit 1ff3c9677bff7e468e0c487d0ffefe4e901d33f4
* remove TCP_COOKIE_TRANSACTIONS from tcp.hSzabolcs Nagy2013-07-241-1/+0
| | | | removed in linux-v3.10 in commit 1a2c6181c4a1922021b4d7df373bba612c3e5f04
* add SO_SELECT_ERR_QUEUE to socket.hSzabolcs Nagy2013-07-241-0/+1
| | | | introduced in linux-v3.10 commit 7d4c04fc170087119727119074e72445f2bb192b
* prepare strcoll/wcscoll for LC_COLLATE support and add ABI symbolsRich Felker2013-07-244-15/+20
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* add _l versions of strtod family functions, purely as aliasesRich Felker2013-07-241-0/+8
| | | | | | | | this is a cheat since the _l versions take an extra argument, but since these functions are only here for ABI purposes, it doesn't really matter as long as the ABI matches. if the non-__-prefixed versions are eventually made public, they should proabably be real functions rather than hacks like this.
* add __wcsftime_l symbolRich Felker2013-07-241-3/+9
| | | | | | unlike the strftime commit, this one is purely an ABI compatibility issue. the previous version of the code would have worked just as well with LC_TIME once LC_TIME support is added.
* move strftime_l into strftime.c and add __-prefixed versionRich Felker2013-07-242-8/+10
| | | | | | the latter is both for ABI purposes, and to facilitate eventually adding LC_TIME support. it's also nice to eliminate an extra source file.
* make getaddrinfo with AF_UNSPEC and null host return both IPv4 and v6Rich Felker2013-07-241-14/+23
| | | | | | based on a patch by orc, with indexing and flow control cleaned up a little bit. this code is all going to be replaced at some point in the near future.
* support STB_GNU_UNIQUE symbol bindings in dynamic linkerRich Felker2013-07-241-1/+1
| | | | | | | | | these are needed for some C++ library binaries including most builds of libstdc++. I'm not entirely clear on the rationale. this patch does not implement any special semantics for them, but as far as I can tell, no special treatment is needed in correctly-linked programs; this binding seems to exist only for catching incorrectly-linked programs.
* move the dynamic linker's jmp_buf from static to automatic storageRich Felker2013-07-241-5/+7
| | | | | this more than compensates for the size increase of jmp_buf, and greatly reduces bss/data size on archs with huge jmp_buf.
* change jmp_buf to share an underlying type and struct tag with sigjmp_bufRich Felker2013-07-249-15/+14
| | | | | | | | | | this is necessary to meet the C++ ABI target. alternatives were considered to avoid the size increase for non-sig jmp_buf objects, but they seemed to have worse properties. moreover, the relative size increase is only extreme on x86[_64]; one way of interpreting this is that, if the size increase from this patch makes jmp_buf use too much memory, then the program was already using too much memory when built for non-x86 archs.
* remove redundant check in memalignRich Felker2013-07-231-1/+1
| | | | | the case where mem was already aligned is handled earlier in the function now.
* fix heap corruption bug in memalignRich Felker2013-07-231-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | this bug was caught by the new footer-corruption check in realloc and free. if the block returned by malloc was already aligned to the desired alignment, memalign's logic to split off the misaligned head was incorrect; rather than writing to a point inside the allocated block, it was overwriting the footer of the previous block on the heap with the value 1 (length 0 plus an in-use flag). fortunately, the impact of this bug was fairly low. (this is probably why it was not caught sooner.) due to the way the heap works, malloc will never return a block whose previous block is free. (doing so would be harmful because it would increase fragmentation with no benefit.) the footer is actually not needed for in-use blocks, except that its in-use bit needs to remain set so that it does not get merged with free blocks, so there was no harm in it being set to 1 instead of the correct value. however, there is one case where this bug could have had an impact: in multi-threaded programs, if another thread freed the previous block after memalign's call to malloc returned, but before memalign overwrote the previous block's footer, the resulting block in the free list could be left in a corrupt state. I have not analyzed the impact of this bad state and whether it could lead to more serious malfunction.
* enhance build process to allow selective -O3 optimizationRich Felker2013-07-222-12/+57
| | | | | | | | | | | | | | | | | the motivation for this patch is that the vast majority of libc is code that does not benefit at all from optimizations, but that certain components like string/memory operations can be major performance bottlenecks. at the same time, the old -falign-*=1 options are removed, since they were only beneficial for avoiding bloat when global -O3 was used, and in that case, they may have prevented some of the performance gains. to be the most useful, this patch will need further tuning. in particular, research is needed to determine which components should be built with -O3 by default, and it may be desirable to remove the hard-coded -O3 and instead allow more customization of the optimization level used for selected modules.
* undefine internal-use type macros at the end of alltypes.hRich Felker2013-07-221-0/+4
| | | | | | | | | | | | | | | | | this patch is something of a compromise for a compatibility regression discovered after the header refactoring: libtiff uses _Int64 for its own use. this is absolutely wrong, invalid C, and should not be supported, but it's also frustrating for users when code that used to work suddenly breaks. rather than leave the breakage in place or change musl internals to accommodate broken software, I've found a change that makes the problem go away and improves musl. by undefining these macros at the end of alltypes.h, the temptation to use them in other headers is removed. (for example, I almost used _Int64 in sys/types.h to define u_int64_t rather than adding it back to alltypes.h.) by confining use of these macros to alltypes.h, we keep it easy to go back and change the implementation of alltypes later, if needed.
* remove SIG_ATOMIC_MIN/MAX from stdint bits headersRich Felker2013-07-225-10/+0
| | | | i386 was done with the big commit but I missed the others
* move register_t and u_int64_t (back) to alltypesRich Felker2013-07-222-2/+7
| | | | | | | | during the header refactoring, I had moved u_int64_t out of alltypes under the assumption that we could just use long long everywhere. however, it seems some broken applications make inconsistent mixed use of u_int64_t and uint64_t, resulting in build errors when the underlying type differs.
* fix regression in size of nlink_t (broken stat struct) on x86_64Rich Felker2013-07-227-1/+7
| | | | | | | | rather than moving nlink_t back to the arch-specific file, I've added a macro _Reg defined to the canonical type for register-size values on the arch. this is not the same as _Addr for (not-yet-supported) 32-on-64 pseudo-archs like x32 and mips n32, so a new macro was needed.
* make regoff_t and regex_t match C++ ABIRich Felker2013-07-222-3/+3
| | | | | | for regoff_t, it's impossible to match on 64-bit archs because glibc defined the type in a non-conforming way. however this change makes the type match on 32-bit archs.
* disable legacy init/fini processing on ARMRich Felker2013-07-222-0/+6
| | | | | | | | | | | since the old, poorly-thought-out musl approach to init/fini arrays on ARM (when it was the only arch that needed them) was to put the code in crti/crtn and have the legacy _init/_fini code run the arrays, adding proper init/fini array support caused the arrays to get processed twice on ARM. I'm not sure skipping legacy init/fini processing is the best solution to the problem, but it works, and it shouldn't break anything since the legacy init/fini system was never used for ARM EABI.
* make pthread_key_t unsigned to match ABIRich Felker2013-07-221-1/+1
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* make pthread attribute types structs, even when they just have one fieldRich Felker2013-07-2212-25/+25
| | | | | this change is to get the right tags for C++ ABI matching. it should have no other effects.
* change wint_t to unsignedRich Felker2013-07-229-10/+10
| | | | | | | | | | | | aside from the obvious C++ ABI purpose for this change, it also brings musl into alignment with the compiler's idea of the definition of wint_t (use in -Wformat), and makes the situation less awkward on ARM, where wchar_t is unsigned. internal code using wint_t and WEOF was checked against this change, and while a few cases of storing WEOF into wchar_t were found, they all seem to operate properly with the natural conversion from unsigned to signed.
* refactor headers, especially alltypes.h, and improve C++ ABI compatRich Felker2013-07-2241-907/+335
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the arch-specific bits/alltypes.h.sh has been replaced with a generic alltypes.h.in and minimal arch-specific bits/alltypes.h.in. this commit is intended to have no functional changes except: - exposing additional symbols that POSIX allows but does not require - changing the C++ name mangling for some types - fixing the signedness of blksize_t on powerpc (POSIX requires signed) - fixing the limit macros for sig_atomic_t on x86_64 - making dev_t an unsigned type (ABI matching goal, and more logical) in addition, some types that were wrongly defined with long on 32-bit archs were changed to int, and vice versa; this change is non-functional except for the possibility of making pointer types mismatch, and only affects programs that were using them incorrectly, and only at build-time, not runtime. the following changes were made in the interest of moving non-arch-specific types out of the alltypes system and into the headers they're associated with, and also will tend to improve application compatibility: - netdb.h now includes netinet/in.h (for socklen_t and uint32_t) - netinet/in.h now includes sys/socket.h and inttypes.h - sys/resource.h now includes sys/time.h (for struct timeval) - sys/wait.h now includes signal.h (for siginfo_t) - langinfo.h now includes nl_types.h (for nl_item) for the types in stdint.h: - types which are of no interest to other headers were moved out of the alltypes system. - fast types for 8- and 64-bit are hard-coded (at least for now); only the 16- and 32-bit ones have reason to vary by arch. and the following types have been changed for C++ ABI purposes; - mbstate_t now has a struct tag, __mbstate_t - FILE's struct tag has been changed to _IO_FILE - DIR's struct tag has been changed to __dirstream - locale_t's struct tag has been changed to __locale_struct - pthread_t is defined as unsigned long in C++ mode only - fpos_t now has a struct tag, _G_fpos64_t - fsid_t's struct tag has been changed to __fsid_t - idtype_t has been made an enum type (also required by POSIX) - nl_catd has been changed from long to void * - siginfo_t's struct tag has been removed - sigset_t's has been given a struct tag, __sigset_t - stack_t has been given a struct tag, sigaltstack - suseconds_t has been changed to long on 32-bit archs - [u]intptr_t have been changed from long to int rank on 32-bit archs - dev_t has been made unsigned summary of tests that have been performed against these changes: - nsz's libc-test (diff -u before and after) - C++ ABI check symbol dump (diff -u before, after, glibc) - grepped for __NEED, made sure types needed are still in alltypes - built gcc 3.4.6
* remove init/fini array asm from arm crti/crtn filesRich Felker2013-07-212-44/+4
| | | | | this code has been replaced by portable C code that works on all archs. the old asm needs to be removed or ctors/dtors will run twice.
* remove __libc_csu_* cruftRich Felker2013-07-212-10/+0
| | | | | | | these functions were mistakenly assumed to be needed to match glibc ABI, but glibc has them as part of the non-shared part of libc that's always statically linked into the main program. moreover, the only place they are referenced from is glibc's crt1.o.
* add support for init/fini array in main program, and greatly simplifyRich Felker2013-07-214-26/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | modern (4.7.x and later) gcc uses init/fini arrays, rather than the legacy _init/_fini function pasting and crtbegin/crtend ctors/dtors system, on most or all archs. some archs had already switched a long time ago. without following this change, global ctors/dtors will cease to work under musl when building with new gcc versions. the most surprising part of this patch is that it actually reduces the size of the init code, for both static and shared libc. this is achieved by (1) unifying the handling main program and shared libraries in the dynamic linker, and (2) eliminating the glibc-inspired rube goldberg machine for passing around init and fini function pointers. to clarify, some background: the function signature for __libc_start_main was based on glibc, as part of the original goal of being able to run some glibc-linked binaries. it worked by having the crt1 code, which is linked into every application, static or dynamic, obtain and pass pointers to the init and fini functions, which __libc_start_main is then responsible for using and recording for later use, as necessary. however, in neither the static-linked nor dynamic-linked case do we actually need crt1.o's help. with dynamic linking, all the pointers are available in the _DYNAMIC block. with static linking, it's safe to simply access the _init/_fini and __init_array_start, etc. symbols directly. obviously changing the __libc_start_main function signature in an incompatible way would break both old musl-linked programs and glibc-linked programs, so let's not do that. instead, the function can just ignore the information it doesn't need. new archs need not even provide the useless args in their versions of crt1.o. existing archs should continue to provide it as long as there is an interest in having newly-linked applications be able to run on old versions of musl; at some point in the future, this support can be removed.
* fix order of fini_array execution for shared libsRich Felker2013-07-211-2/+2
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* add support for init_array/fini_array ctors/dtors to dynamic linkerRich Felker2013-07-201-2/+13
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* fix shm_open wrongly being cancellableRich Felker2013-07-201-1/+6
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* fix uninitialized/stale use of alloc (%m modifier) flag in scanfRich Felker2013-07-202-0/+4
| | | | | | | | | for conversion specifiers, alloc is always set when the specifier is parsed. however, if scanf stops due to mismatching literal text, either an uninitialized (if no conversions have been performed yet) or stale (from the previous conversion) of the flag will be used, possibly causing an invalid pointer to be passed to free when the function returns.
* harden realloc/free to detect simple overflowsRich Felker2013-07-191-0/+6
| | | | | | | | | | | the sizes in the header and footer for a chunk should always match. if they don't, the program has definitely invoked undefined behavior, and the most likely cause is a simple overflow, either of a buffer in the block being freed or the one just below it. crashing here should not only improve security of buggy programs, but also aid in debugging, since the crash happens in a context where you have a pointer to the likely-overflowed buffer.
* add UIO_MAXIOV macro in sys/uio.hRich Felker2013-07-191-0/+2
| | | | | | while there's no POSIX namespace provision for UIO_* in uio.h, this exact macro name is reserved in XBD 2.2.2. apparently some glibc-centric software expects it to exist, so let's provide it.
* improve [f]stat[v]fs functions, and possibly work around old kernelsRich Felker2013-07-191-2/+5
| | | | | | | | | | | | | | | | | the main aim of this patch is to ensure that if not all fields are filled in, they contain zeros, so as not to confuse applications. reportedly some older kernels, including commonly used openvz kernels, lack the f_flags field, resulting in applications reading random junk as the mount flags; the common symptom seems to be wrongly considering the filesystem to be mounted read-only and refusing to operate. glibc has some amazingly ugly fallback code to get the mount flags for old kernels, but having them really is not that important anyway; what matters most is not presenting incorrect flags to the application. I have also aimed to fill in some fields of statvfs that were previously missing, and added code to explicitly zero the reserved space at the end of the structure, which will make things easier in the future if this space someday needs to be used.
* change uid_t, gid_t, and id_t to unsigned typesRich Felker2013-07-198-24/+38
| | | | | | | | | this change is both to fix one of the remaining type (and thus C++ ABI) mismatches with glibc/LSB and to allow use of the full range of uid and gid values, if so desired. passwd/group access functions were not prepared to deal with unsigned values, so they too have been fixed with this commit.
* fix invalid C in new trycppif tests in configure scriptRich Felker2013-07-181-1/+2
| | | | | an empty program is not valid and would be reasonable grounds for the compiler to give an error, which would break these tests.
* add build system support for arch endian & float abi variantsRich Felker2013-07-182-1/+33
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* make the dynamic linker find its path file relative to its own locationRich Felker2013-07-187-7/+53
| | | | | | | | | | | | | | | | | | | prior to this change, using a non-default syslibdir was impractical on systems where the ordinary library paths contain musl-incompatible library files. the file containing search paths was always taken from /etc, which would either correspond to a system-wide musl installation, or fail to exist at all, resulting in searching of the default library path. the new search strategy is safe even for suid programs because the pathname used comes from the PT_INTERP header of the program being run, rather than any external input. as part of this change, I have also begun differentiating the names of arch variants that differ by endianness or floating point calling convention. the corresponding changes in the build system and and gcc wrapper script (to use an alternate dynamic linker name) for these configurations have not yet been made.
* fix off-by-one error in checks for implementation-internal signal numbersRich Felker2013-07-183-3/+3
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* fix FILENAME_MAX to match PATH_MAXRich Felker2013-07-181-1/+1
| | | | | | POSIX is not clear on whether it includes the termination, but ISO C requires that it does. the whole concept of this macro is rather useless, but it's better to be correct anyway.
* make spacing in x86_64 alltypes.h.sh more uniform with other archsRich Felker2013-07-171-0/+1
| | | | patch by Luka Perkov, who noted that all other archs have a newline.
* make posix_spawn (and functions that use it) use CLONE_VFORK flagRich Felker2013-07-171-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | this is both a minor scheduling optimization and a workaround for a difficult-to-fix bug in qemu app-level emulation. from the scheduling standpoint, it makes no sense to schedule the parent thread again until the child has exec'd or exited, since the parent will immediately block again waiting for it. on the qemu side, as regular application code running on an underlying libc, qemu cannot make arbitrary clone syscalls itself without confusing the underlying implementation. instead, it breaks them down into either fork-like or pthread_create-like cases. it was treating the code in posix_spawn as pthread_create-like, due to CLONE_VM, which caused horribly wrong behavior: CLONE_FILES broke the synchronization mechanism, CLONE_SIGHAND broke the parent's signals, and CLONE_THREAD caused the child's exec to end the parent -- if it hadn't already crashed. however, qemu special-cases CLONE_VFORK and emulates that with fork, even when CLONE_VM is also specified. this also gives incorrect semantics for code that really needs the memory sharing, but posix_spawn does not make use of the vm sharing except to avoid momentary double commit charge. programs using posix_spawn (including via popen) should now work correctly under qemu app-level emulation.
* fix missing argument in variadic syscall macrosRich Felker2013-07-171-1/+1
| | | | | | for 0-argument syscalls (1 argument to the macro, the syscall number), the __SYSCALL_NARGS_X macro's ... argument was not satisfied. newer compilers seem to care about this.
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