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Commit Graph

1320 Commits

Author SHA1 Message Date
Rich Felker
fa91df41e8 more stuff lost committing mips dynamic linker 2012-08-05 13:48:42 -04:00
Rich Felker
59f4086cb1 fix change lost in the process of integrating mips dynamic linker 2012-08-05 13:46:39 -04:00
Rich Felker
470569ca00 remove configure check disabling shared libraries on mips 2012-08-05 12:57:19 -04:00
Rich Felker
babf820180 mips dynamic linker support
not heavily tested, but the basics are working. the basic concept is
that the dynamic linker entry point code invokes a pure-PIC (no global
accesses) C function in reloc.h to perform the early GOT relocations
needed to make the dynamic linker itself functional, then invokes
__dynlink like on other archs. since mips uses some ugly arch-specific
hacks to optimize relocating the GOT (rather than just using the
normal DT_REL[A] tables like on other archs), the dynamic linker has
been modified slightly to support calling arch-specific relocation
code in reloc.h.

most of the actual mips-specific behavior was developed by reading the
output of readelf on libc.so and simple executable files. i could not
find good reference information on which relocation types need to be
supported or their semantics, so it's possible that some legitimate
usage cases will not work yet.
2012-08-05 12:50:26 -04:00
Rich Felker
d04378016b make dynlink.lo depend on reloc.h in makefile
this is mainly a development convenience but will also ensure users
building from latest git always get up-to-date arch-specific dynamic
linker code without having to "make clean".
2012-08-05 12:32:20 -04:00
Rich Felker
87d13a4c33 more cleanup of dynamic linker internals 2012-08-05 02:49:02 -04:00
Rich Felker
7cb44cd3de more dynamic linker internals cleanup
changing the string printed for the dso name is not a regression; the
old code was simply using the wrong dso name (head rather than the dso
currently being relocated). this will be fixed in a later commit.
2012-08-05 02:44:32 -04:00
Rich Felker
05eff01e89 dynamic linker internals cleanup 2012-08-05 02:38:35 -04:00
Rich Felker
5a3a378615 floating point support for arm setjmp/longjmp
not heavily tested, but at least they don't seem to break anything on
soft float targets with or without coprocessors. they check the auxv
AT_HWCAP flags to determine which coprocessor, if any, is available.
2012-08-05 02:37:14 -04:00
Rich Felker
8a996b7e6c release notes for 0.9.3 2012-08-02 22:11:49 -04:00
Rich Felker
1b23145e88 abstract out compiler runtime library for linking libc.so
this allows config.mak to override the default -lgcc for building with
other compilers such as pcc/clang/etc.
2012-08-02 21:05:43 -04:00
Rich Felker
b0fc78520d fix argument type error on wcwidth function
since the correct declaration was not visible, and since the
representation of the types wchar_t and wint_t always match, a
compiler would have to go out of its way to make this bug manifest,
but better to fix it anyway.
2012-08-02 21:02:34 -04:00
Rich Felker
129ca6c05d fix missing static in getusershell (namespace pollution) 2012-08-02 14:32:17 -04:00
Rich Felker
970ef6a124 optimize mempcpy to minimize need for data saved across the call 2012-07-31 21:18:17 -04:00
Rich Felker
5aac5e2189 optimize arm setjmp/longjmp register saving/loading
the original code was wrongly based on how it would be done in thumb
mode, but that's not needed because musl's asm only targets arm.
2012-07-27 00:17:09 -04:00
Rich Felker
e1b9c1b01b save AT_HWCAP from auxv for subsequent use in machine-specific code
it's expected that this will be needed/useful only in asm, so I've
given it its own symbol that can be addressed in pc-relative ways from
asm rather than adding a field in the __libc structure which would
require hard-coding the offset wherever it's used.
2012-07-27 00:14:57 -04:00
Rich Felker
07e62953c7 retry on cas failures in sem_trywait
this seems counter-intuitive since sem_trywait is supposed to just try
once, not wait for the semaphore. however, the retry loop is not a
wait. instead, it's to handle the case where the value changes due to
a simultaneous post or wait from another thread while the semaphore
value remains positive. in such a case, it's absolutely wrong for
sem_trywait to fail with EAGAIN because the semaphore is not busy.
2012-07-24 00:51:36 -04:00
Rich Felker
5d26d5d15b gcc wrapper improvement: leave libgcc dir in the library path
this is needed in case -lgcc is passed explicitly on the link command
line, for example if the wrapper is being used to build musl itself.
2012-07-23 23:29:03 -04:00
Rich Felker
d426b04533 add ioperm/iopl syscalls
based on patches by orc and Isaac Dunham, with some fixes. sys/io.h
exists and contains prototypes for these functions regardless of
whether the target arch has them; this is a bit unorthodox but I don't
think it will break anything. the function definitions do not exist
unless the appropriate SYS_* syscall number macro is defined, which
should make sure configure scripts looking for these functions don't
find them on other systems.

presently, sys/io.h does not have the inb/outb/etc. port io
macros/functions. I'd be surprised if ioperm/iopl are useful without
them, so they probably need to be added at some point in appropriate
bits/io.h files...
2012-07-23 16:54:53 -04:00
Rich Felker
53147f902b add splice and vmsplice syscalls
based on patches by orc and Isaac Dunham.
2012-07-23 16:50:56 -04:00
Rich Felker
207460d097 add extended attributes syscalls
based on patch by orc and Isaac Dunham, with some fixes.
2012-07-23 16:39:44 -04:00
Rich Felker
42f0e965c4 add pipe2 syscall
based on patch by orc and Isaac Dunham, with some details fixed.
2012-07-23 16:32:49 -04:00
Rich Felker
845a5e69fa remove scanf dependency from getaddrinfo /etc/services support 2012-07-22 22:09:45 -04:00
Rich Felker
efe72c5619 getaddrinfo /etc/services lookup support 2012-07-22 19:42:44 -04:00
Rich Felker
b4f632bb27 fix namespace issue in prototypes in math.h 2012-07-22 19:02:02 -04:00
Rich Felker
d646249124 fix wrong size for sigjmp_buf signal set array
128 is the size in bytes, not longs.
2012-07-22 18:58:35 -04:00
Rich Felker
dc046f55bb add floating point register saving/restoring to mips setjmp/longjmp
also fix the alignment of jmp_buf to meet the abi. linux always
emulates fpu on mips if it's not present, so enabling this code
unconditionally is "safe" but may be slow. in the long term it may be
preferable to find a way to disable it on soft float builds.
2012-07-22 18:55:01 -04:00
Rich Felker
75fff40b9b make getservby*_r return error code rather than -1 (and using errno)
untested but should be correct..
2012-07-22 18:49:49 -04:00
Rich Felker
68c5822367 fix logic error for skipping failed interfaces in if_nameindex 2012-07-21 17:56:48 -04:00
Rich Felker
f07222739b fix typo in aio.h 2012-07-19 00:37:43 -04:00
Rich Felker
06650b9684 fix getservby*() with null pointer for protocol argument
not sure this is the best fix but it should work
2012-07-14 20:16:23 -04:00
Rich Felker
7be3b5a073 avoid blx instruction which does not exist on armv4t or armv4 2012-07-14 20:15:02 -04:00
Rich Felker
649cec5f98 make dynamic linker tell the debugger its own pathname
use the main program's PT_INTERP header if possible, since this is
sure to be a correct (and hopefully absolute) pathname.
2012-07-13 01:31:02 -04:00
Rich Felker
48d20136b0 fix broken mips a_fetch_add
sc was overwriting the result
2012-07-12 23:18:03 -04:00
Rich Felker
532cd3a717 sigsetjmp asm for mips 2012-07-12 22:20:36 -04:00
Rich Felker
e1e4d6b269 mipsel (little endian) support
the fields in the mcontext_t are long long (for no good reason) even
on 32-bit mips, so the offset of the instruction pointer (as a word)
varies depending on endianness.
2012-07-12 21:49:30 -04:00
Rich Felker
96107564e2 workaround another sendmsg kernel bug on 64-bit machines
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.
2012-07-12 21:37:54 -04:00
Rich Felker
90e123f4a8 fix redef of sigprocmask constants on mips
this fix is easier than trying to reorder the header stuff
2012-07-12 16:54:43 -04:00
Rich Felker
a1546e8d61 disable dynamic linking on mips for now (broken) 2012-07-12 14:24:10 -04:00
Rich Felker
ba8a96b068 more mips bits-header fixes
signal handling was very broken because of this
2012-07-12 14:21:41 -04:00
Rich Felker
db11e96493 fix mips syscalls with long long args
like arm, mips requires 64-bit arguments to be "aligned" on an even
register boundary.
2012-07-12 13:48:56 -04:00
Rich Felker
bbbe87e35c fix several locks that weren't updated right for new futex-based __lock
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.
2012-07-12 11:23:43 -04:00
Rich Felker
c89f130f39 fix pthread_kill unlocking
it had not been updated for the futex-based locks
2012-07-12 11:14:12 -04:00
Rich Felker
ea4175e73f fix breakage of x86_64 sigaction from recent changes for mips 2012-07-12 11:00:21 -04:00
Rich Felker
5fac93db37 fix mips mcontext_t structure size
otherwise offs in ucontext_t will be wrong, and break code that
inspects or modifies the signal makes (including cancellation code).
2012-07-12 00:14:40 -04:00
Rich Felker
92f8396b0c fix potential race condition in detached threads
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.
2012-07-11 23:36:46 -04:00
Rich Felker
a03f69d445 mips clone: don't free stack space used to copy arg
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...
2012-07-11 23:01:09 -04:00
Rich Felker
b58f738bcb fix mips clone() on real linux kernel
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.
2012-07-11 22:59:43 -04:00
Rich Felker
2b3cc04a8d fix MAP_ANONYMOUS value for mips, remove cruft copied from i386 2012-07-11 22:29:57 -04:00
Rich Felker
715b6403ce fix clone() on mips (args were in wrong order)
with this change, threads on mips seem to be working
2012-07-11 20:44:38 -04:00