| Commit message (Expand) | Author | Age | Files | Lines |
|---|
| * | i386 vsyscall support (vdso-provided sysenter/syscall instruction based)•••this doubles the performance of the fastest syscalls on the atom I
tested it on; improvement is reportedly much more dramatic on
worst-case cpus. cannot be used for cancellable syscalls.
| Rich Felker | 2012-10-11 | 1 | -66/+7 |
| * | fix incorrect TLS reloc macro names in x86_64 reloc.h | Rich Felker | 2012-10-05 | 1 | -3/+3 |
| * | dynamic-linked TLS support for everything but dlopen'd libs•••currently, only i386 is tested. x86_64 and arm should probably work.
the necessary relocation types for mips and microblaze have not been
added because I don't understand how they're supposed to work, and I'm
not even sure if it's defined yet on microblaze. I may be able to
reverse engineer the requirements out of gcc/binutils output.
| Rich Felker | 2012-10-04 | 5 | -5/+63 |
| * | microblaze port•••based on initial work by rdp, with heavy modifications. some features
including threads are untested because qemu app-level emulation seems
to be broken and I do not have a proper system image for testing.
| Rich Felker | 2012-09-29 | 29 | -0/+1962 |
| * | fix IPC_64 in msgctl too | Rich Felker | 2012-09-22 | 1 | -0/+2 |
| * | fix broken semctl on systems that don't use IPC_64 flag•••not tested on mips and arm; they may still be broken. x86_64 should be
ok now.
| Rich Felker | 2012-09-22 | 3 | -0/+6 |
| * | add O_EXEC open mode•••the linux O_PATH mode provides the necessary semantics for both the
O_SEARCH and O_EXEC modes defined and required by POSIX 2008.
| Rich Felker | 2012-09-15 | 4 | -0/+4 |
| * | fix syscall asm constraints for arm too•••no problems were detected so far, but the constraints seem to have
been invalid just like the mips ones.
| Rich Felker | 2012-09-15 | 1 | -4/+4 |
| * | fix buggy constraints in mips inline syscall asm•••if same register is used for input/output, the compiler must be told.
otherwise is generates random junk code that clobbers the result. in
pure syscall-wrapper functions, nothing went wrong, but in more
complex functions where register allocation is non-trivial, things
broke badly.
| Rich Felker | 2012-09-15 | 1 | -2/+2 |
| * | add O_PATH/O_SEARCH support to fcntl.h•••I'm not 100% sure that Linux's O_PATH meets the POSIX requirements for
O_SEARCH, but it seems very close if not perfect. and old kernels
ignore it, so O_SEARCH will still work as desired as long as the
caller has read permissions to the directory.
| Rich Felker | 2012-09-13 | 4 | -0/+8 |
| * | improve mips syscall asm constraints to use immediates, if possible•••by using the "ir" constraint (immediate or register) and the carefully
constructed instruction addu $2,$0,%2 which can take either an
immediate or a register for %2, the new inline asm admits maximal
optimization with no register spillage to the stack when the compiler
successfully performs constant propagration, but still works by
allocating a register when the syscall number cannot be recognized as
a constant. in the case of syscalls with 0-3 arguments it barely
matters, but for 4-argument syscalls, using an immediate for the
syscall number avoids creating a stack frame for the syscall wrapper
function.
| Rich Felker | 2012-09-11 | 1 | -12/+21 |
| * | eliminate assumption that mips syscall restart preserves r25•••all past and current kernel versions have done so, but there seems to
be no reason it's necessary and the sentiment from everyone I've asked
has been that we should not rely on it. instead, use r7 (an argument
register) which will necessarily be preserved upon syscall restart.
however this only works for 0-3 argument syscalls, and we have to
resort to the function call for 4-argument syscalls.
| Rich Felker | 2012-09-10 | 1 | -23/+12 |
| * | inline syscall support for arm•••most pure-syscall-wrapper functions compile to the smallest/simplest
code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail
call to __syscall_ret).
| Rich Felker | 2012-09-09 | 1 | -0/+53 |
| * | inline syscall support for mips•••this drastically reduces the size of some functions which are purely
syscall wrappers.
disabled for clang due to known bugs satisfying register constraints.
| Rich Felker | 2012-09-09 | 1 | -0/+57 |
| * | syscall organization overhaul•••now public syscall.h only exposes __NR_* and SYS_* constants and the
variadic syscall function. no macros or inline functions, no
__syscall_ret or other internal details, no 16-/32-bit legacy syscall
renaming, etc. this logic has all been moved to src/internal/syscall.h
with the arch-specific parts in arch/$(ARCH)/syscall_arch.h, and the
amount of arch-specific stuff has been reduced to a minimum.
changes still need to be reviewed/double-checked. minimal testing on
i386 and mips has already been performed.
| Rich Felker | 2012-09-08 | 8 | -632/+282 |
| * | add acct, accept4, setns, and dup3 syscalls (linux extensions)•••based on patch by Justin Cormack
| Rich Felker | 2012-09-08 | 1 | -0/+3 |
| * | add clang-compatible thread-pointer code for mips•••clang does not presently support the "v" constraint we want to use to
get the result from $3, and trying to use register...__asm__("$3") to
do the same invokes serious compiler bugs. so for now, i'm working
around the issue with an extra temp register and putting $3 in the
clobber list instead of using it as output. when the bugs in clang are
fixed, this issue should be revisited to generate smaller/faster code
like what gcc gets.
| Rich Felker | 2012-09-07 | 1 | -0/+4 |
| * | avoid "inline" in public headers for strict c89 compatibility•••while musl itself requires a c99 compiler, some applications insist on
being compiled with c89 compilers, and use of "inline" in the headers
was breaking them. much of this had been avoided already by just
skipping the inline keyword in pre-c99 compilers or modes, but this
new unified solution is cleaner and may/should result in better code
generation in the default gcc configuration.
| Rich Felker | 2012-09-02 | 4 | -35/+35 |
| * | avoid need for -march=mips2 to compile mips atomic.h asm•••linux guarantees ll/sc are always available. on mips1, they will be
emulated by the kernel. thus they are part of the linux mips1 abi and
safe to use.
| Rich Felker | 2012-08-11 | 1 | -0/+8 |
| * | use int instead of long for ptrdiff_t on all 32-bit archs•••this is needed to match the underlying "ABI" standards. it's not
really an ABI issue since the binary representations are the same, but
having the wrong type can lead to errors when the type arising from a
difference-of-pointers expression does not match the defined type of
ptrdiff_t. most of the problems affect C++, not C.
| Rich Felker | 2012-08-10 | 2 | -2/+2 |
| * | fix incorrect ptrdiff_t type on mips | Rich Felker | 2012-08-10 | 1 | -1/+1 |
| * | add defines for number of sigset_t bytes syscalls expect•••yet another gratuitous mips incompatibility...
| Rich Felker | 2012-08-09 | 4 | -0/+8 |
| * | further fixes for mips ioctl.h header•••untested; hopefully it's right now
| Rich Felker | 2012-08-07 | 1 | -4/+4 |
| * | fix another mips gratuitous-incompatibility bug: ioctl numbers | Rich Felker | 2012-08-07 | 1 | -2/+2 |
| * | fix socket.h on mips•••why does mips have to be gratuitously incompatible in every possible
imaginable way?
| Rich Felker | 2012-08-05 | 1 | -0/+3 |
| * | more stuff lost committing mips dynamic linker | Rich Felker | 2012-08-05 | 1 | -2/+2 |
| * | 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.
| Rich Felker | 2012-08-05 | 1 | -3/+53 |
| * | 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.
| Rich Felker | 2012-07-22 | 1 | -1/+1 |
| * | fix broken mips a_fetch_add•••sc was overwriting the result
| Rich Felker | 2012-07-12 | 1 | -7/+7 |
| * | 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.
| Rich Felker | 2012-07-12 | 1 | -1/+1 |
| * | 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.
| Rich Felker | 2012-07-12 | 4 | -0/+29 |
| * | fix redef of sigprocmask constants on mips•••this fix is easier than trying to reorder the header stuff
| Rich Felker | 2012-07-12 | 1 | -0/+3 |
| * | more mips bits-header fixes•••signal handling was very broken because of this
| Rich Felker | 2012-07-12 | 1 | -2/+6 |
| * | fix mips syscalls with long long args•••like arm, mips requires 64-bit arguments to be "aligned" on an even
register boundary.
| Rich Felker | 2012-07-12 | 1 | -1/+1 |
| * | 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).
| Rich Felker | 2012-07-12 | 1 | -1/+5 |
| * | fix MAP_ANONYMOUS value for mips, remove cruft copied from i386 | Rich Felker | 2012-07-11 | 1 | -2/+1 |
| * | initial version of mips (o32) port, based on work by Richard Pennington (rdp)•••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.
| Rich Felker | 2012-07-11 | 29 | -0/+2037 |
| * | support -mfpmath=387 on x86_64•••apparently somebody wants this for something... and it doesn't hurt.
| Rich Felker | 2012-07-10 | 1 | -0/+4 |
| * | fix wrong value of FLT_EVAL_METHOD for x86_64 | Rich Felker | 2012-07-10 | 1 | -1/+1 |
| * | make arm syscalls (still non-inline) more efficient•••no need to pass zero for unused arguments; just omit them.
| Rich Felker | 2012-07-08 | 1 | -6/+6 |
| * | remove little-endian assumption from arm atomic.h•••this hidden endian dependency had left big endian arm badly broken.
| Rich Felker | 2012-07-08 | 1 | -4/+6 |
| * | jmp_buf overhaul fixing several issues•••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.
| Rich Felker | 2012-07-03 | 3 | -3/+3 |
| * | update syscall defs to latest kernel ones•••patch submitted by Kristian L. <email@thexception.net>
| Rich Felker | 2012-06-23 | 3 | -0/+38 |
| * | proper error handling for fcntl F_GETOWN on modern kernels•••on old kernels, there's no way to detect errors; we must assume
negative syscall return values are pgrp ids. but if the F_GETOWN_EX
fcntl works, we can get a reliable answer.
| Rich Felker | 2012-06-20 | 3 | -0/+9 |
| * | fix arm syscall.h to reflect which syscalls actually exist (on EABI) | Rich Felker | 2012-05-24 | 1 | -22/+0 |
| * | fix missing _BSD_SOURCE support in bits/*.h•••this is actually rather ugly, and would get even uglier if we ever
want to support further feature test macros. at some point i may
factor the bits headers into separate files for C base, POSIX base,
and nonstandard extensions (the only distinctions that seem to matter
now) and then the logic for which to include can go in the main header
rather than being duplicated for each arch. the downside of this is
that it would result in more files having to be opened during
compilation, so as long as the ugliness does not grow, i'm inclined to
leave it alone for now.
| Rich Felker | 2012-05-22 | 9 | -12/+12 |
| * | fix float_t and double_t defs on x86 when -mfpmath=sse -msse2 is used | Rich Felker | 2012-04-29 | 1 | -0/+5 |
| * | support FLT_EVAL_METHOD changing on x86 with gcc -msse2 -mfpmath=sse•••if the compiler provides a value, use it; otherwise fallback to the
platform default (2).
| Rich Felker | 2012-04-27 | 1 | -0/+4 |
| * | use signed char rather than plain char for int8_t•••otherwise this BADLY breaks if -funsigned-char is passed to gcc
| Rich Felker | 2012-04-24 | 3 | -12/+12 |
| * | move F_DUPFD_CLOEXEC out of bits•••fcntl values 1024 and up are universal, arch-independent. later I'll
add some of the other linux-specific ones for notify, leases, pipe
size, etc. here too.
| Rich Felker | 2012-04-15 | 3 | -6/+0 |
