Commit Graph

3332 Commits

Author SHA1 Message Date
Petr Vaněk
e7d05c7894 remove dead store in res_msend
The variable nss is set to zero in following line.
2016-04-18 01:31:17 -04:00
Rich Felker
5972c4a411 add mips n32 port (ILP32 ABI for mips64)
based on patch submitted by Jaydeep Patil, with minor changes.
2016-04-18 05:19:13 +00:00
Rich Felker
6d99ad91e8 add support for mips and mips64 r6 isa
mips32r6 and mips64r6 are actually new isas at both the asm source and
opcode levels (pre-r6 code cannot run on r6) and thus need to be
treated as a new subarch. the following changes are made, some of
which yield code generation improvements for non-r6 targets too:

- add subarch logic in configure script and reloc.h files for dynamic
  linker name.

- suppress use of .set mips2 asm directives (used to allow mips2
  atomic instructions on baseline mips1 builds; the kernel has to
  emulate them on mips1) except when actually needed. they cause wrong
  instruction encodings on r6, and pessimize inlining on at least some
  compilers.

- only hard-code sync instruction encoding on mips1.

- use "ZC" constraint instead of "m" constraint for llsc memory
  operands on r6, where the ll/sc instructions no longer accept full
  16-bit offsets.

- only hard-code rdhwr instruction encoding with .word on targets
  (pre-r2) where it may need trap-and-emulate by the kernel.
  otherwise, just use the instruction mnemonic, and allow an arbitrary
  destination register to be used.
2016-04-03 10:42:37 +00:00
Rich Felker
c718f9fc1b fix read past end of haystack buffer for short needles in memmem
the two/three/four byte memmem specializations are not prepared to
handle haystacks shorter than the needle; they unconditionally read at
least up to the needle length and subtract from the haystack length.
if the haystack is shorter, the remaining haystack length underflows
and produces an unbounded search which will eventually either crash or
find a spurious match.

the top-level memmem function attempted to avoid this case already by
checking for haystack shorter than needle, but it failed to re-check
after using memchr to remove the maximal prefix not containing the
first byte of the needle.
2016-04-01 13:36:15 -04:00
Rich Felker
5c3412d225 fix regression disabling use of pause instruction for x86 a_spin
commits e24984efd5 and
16b55298dc inadvertently disabled the
a_spin implementations for i386, x86_64, and x32 by defining a macro
named a_pause instead of a_spin. this should not have caused any
functional regression, but it inhibited cpu relaxation while spinning
for locks.

bug reported by George Kulakowski.
2016-03-29 21:27:28 -04:00
Rich Felker
6d1a3dfeaf fix undefined pointer comparison in stdio-internal __toread
the comparison f->wpos > f->buf has undefined behavior when f->wpos is
a null pointer, despite the intuition (and actual compiler behavior,
for all known compilers) being that NULL > ptr is false for all valid
pointers ptr.

the purpose of the comparison is to determine if the write buffer is
non-empty, and the idiom used elsewhere for that is comparison against
f->wbase, which is either a null pointer when not writing, or equal to
f->buf when writing. in the former case, both f->wpos and f->wbase are
null; in the latter they are both non-null and point into the same
array.
2016-03-28 23:41:17 -04:00
Timo Teräs
5978eb703c fix gethostbyaddr_r to fill struct hostent.h_length as appropriate 2016-03-24 13:48:47 -04:00
Szabolcs Nagy
d578c74e67 add MADV_FREE madvise command from linux v4.5
allows the os to free the marked pages lazily on memory pressure.
expected to increase malloc performance.
new in linux commit 854e9ed09dedf0c19ac8640e91bcc74bc3f9e5c9
2016-03-19 11:31:24 -04:00
Szabolcs Nagy
b10ca0f560 add EPOLLEXCLUSIVE epoll flag from linux v4.5
new flag for exclusive wakeup mode when an event source fd is attached
to multiple epoll fds but they should not all receive the events.
new in linux commit df0108c5da561c66c333bb46bfe3c1fc65905898
2016-03-19 11:31:19 -04:00
Szabolcs Nagy
c1aabc6cac add SO_ATTACH_REUSEPORT_[CE]BPF socket options from linux v4.5
new socket options for setting classic or extended BPF program
for sockets in a SO_REUSEPORT group.  added in linux commit
538950a1b7527a0a52ccd9337e3fcd304f027f13
2016-03-19 11:31:13 -04:00
Szabolcs Nagy
8ffa0375f2 add IPV6_HDRINCL socket option from linux v4.5
new in linux commit 715f504b118998c41a2079a17e16bf5a8a114885
same as IP_HDRINCL but for SOL_IPV6 sockets.
2016-03-19 11:31:02 -04:00
Szabolcs Nagy
84d4f5eee5 add copy_file_range syscall numbers from linux v4.5
it was introduced for offloading copying between regular files
in linux commit 29732938a6289a15e907da234d6692a2ead71855

(microblaze and sh does not yet have the syscall number.)
2016-03-19 11:30:49 -04:00
Szabolcs Nagy
2de52704ca mips64: add recent linux syscall numbers
add userfaultfd, membarrier and mlock2 system call numbers.
2016-03-19 11:30:22 -04:00
Rich Felker
dc4520d9c0 fix outdated pathnames in COPYRIGHT file 2016-03-18 23:46:41 -04:00
Szabolcs Nagy
e9f1c7981a deduplicate bits/mman.h
currently five targets use the same mman.h constants and the rest
share most constants too, so move them to sys/mman.h before the
bits/mman.h include where the differences can be corrected by
redefinition of the macros.

this fixes two minor bugs: POSIX_MADV_DONTNEED was wrong on most
targets (it should be the same as MADV_DONTNEED), and sh defined
the x86-only MAP_32BIT mmap flag.
2016-03-18 22:40:28 -04:00
Rich Felker
4aac019a0e fix padding string formats to width in wide printf variants
the idiom fprintf(f, "%.*s", n, "") was wrongly used in vfwprintf as a
means of producing n spaces; instead it produces no output. the
correct form is fprintf(f, "%*s", n, ""), using width instead of
precision, since for %s the later is a maximum rather than a minimum.
2016-03-16 16:35:22 -04:00
Rich Felker
de400b6609 correct pointer types for a_ll_p and a_sc_p primitives on mips64
these changes should not affect generated code, but they reflect that
the underlying objects operated on by a_cas_p are supposed to have
type volatile void *, not volatile long. in theory a compiler could
treat the effective type mismatch in the "m" memory operands as
undefined behavior.
2016-03-11 05:12:56 +00:00
Rich Felker
27bf42cd9d make mips64 a_sc_p atomic primitive's asm constraints work with clang
apparently clang does not accept matching-register input and output
constraints that differ in size (32-bit vs 64-bit).

based on patch by Jaydeep Patil.
2016-03-11 00:02:10 -05:00
Rich Felker
636a4799dd make configure check for unsupported (SPE) powerpc hard-float models
the SPE ABI may be compatible with soft-float, but actually making it
work requires some additional work, so for now it's best to make sure
broken builds don't happen.
2016-03-06 17:11:29 -05:00
Felix Fietkau
5a92dd95c7 add powerpc soft-float support
Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
instruction set for floating point operations (SPE).
Executing regular PowerPC floating point instructions results in
"Illegal instruction" errors.

Make it possible to run these devices in soft-float mode.
2016-03-06 17:03:01 -05:00
Alexander Monakov
9543656cc3 env: avoid leaving dangling pointers in __env_map
This is the minimal fix for __putenv leaving a pointer to freed heap
storage in __env_map array, which could later on lead to errors such
as double-free.
2016-03-06 13:33:52 -05:00
Rich Felker
589aefa5b0 update documentation files for mips64 port 2016-03-06 17:48:58 +00:00
Rich Felker
83933573af add mips64 port
patch by Mahesh Bodapati and Jaydeep Patil of Imagination
Technologies.
2016-03-06 17:41:56 +00:00
Rich Felker
71392a91c3 generalize mips-specific reloc code not to hard-code sym/type encoding
this change is made in preparation for adding the mips64 port, which
needs a 64-bit (and mips64-specific) form of the R_INFO macro, but
it's a better abstraction anyway.

based on part of the mips64 port patch by Mahesh Bodapati and Jaydeep
Patil of Imagination Technologies.
2016-03-06 17:25:52 +00:00
Szabolcs Nagy
b023c03b57 math: fix expf(-NAN) and exp2f(-NAN) to return -NAN instead of 0
expf(-NAN) was treated as expf(-large) which unconditionally
returns +0, so special case +-NAN.
reported by Petr Hosek.
2016-03-04 17:58:49 -05:00
Nathan Zadoks
db66ef1f7d add sched_getcpu vDSO support
This brings the call to an actually usable speed.
Quick unscientific benchmark: 14ns : 102ns :: vDSO : syscall
2016-03-02 21:35:40 -05:00
Nathan Zadoks
98d335735d add sched_getcpu
This is a GNU extension, but a fairly minor one, for a system call that
otherwise has no libc wrapper.
2016-03-02 21:32:36 -05:00
Szabolcs Nagy
29b1357537 fix ^* at the start of a complete BRE
This is a workaround to treat * as literal * at the start of a BRE.

Ideally ^ would be treated as an anchor at the start of any BRE
subexpression and similarly $ would be an anchor at the end of any
subexpression.  This is not required by the standard and hard to do
with the current code, but it's the existing practice.  If it is
changed, * should be treated as literal after such anchor as well.
2016-03-02 00:47:22 -05:00
Szabolcs Nagy
39ea71fb8a fix * at the start of a BRE subexpression
commit 7eaa76fc2e made * invalid at
the start of a BRE subexpression, but it should be accepted as
literal * there according to the standard.

This patch does not fix subexpressions starting with ^*.
2016-03-02 00:47:19 -05:00
Michael Meeuwisse
6e694d6960 explicitly include stdio.h to get EOF definition needed by wctob 2016-03-02 00:44:56 -05:00
Rich Felker
6d70c08a2c handle non-matching address family entries in hosts file
name_from_hosts failed to account for the possibility of an address
family error from name_from_numeric, wrongly counting such a return as
success and using the uninitialized address data as part of the
results passed up to the caller.

non-matching address family entries cannot simply be ignored or
results would be inconsistent with respect to whether AF_UNSPEC or a
specific address family is queried. instead, record that a
non-matching entry was seen, and fail the lookup with EAI_NONAME of no
matching-family entries are found.
2016-03-02 00:34:51 -05:00
Rich Felker
fd224a800b make aarch64 atomic_arch.h report that it defines pointer-sized ll/sc
at present this is done only for consistency, since this file defines
its own a_cas_p rather than using the new generic one from atomic.h
added in commit 225f6a6b5b. these
definitions may however be useful if we ever need to add other
pointer-sized atomic operations.
2016-02-23 13:04:56 -05:00
Bobby Bingham
225f6a6b5b allow implementing a_cas_p with pointer-sized ll/sc
No current ports do this, but it will be useful for porting to 64-bit ll/sc
architectures, such as mips64 and powerpc64.
2016-02-23 13:04:08 -05:00
Rich Felker
074e6b3fe3 release 1.1.14 2016-02-22 00:07:05 -05:00
Rich Felker
8b084f06d0 generate list of crt files to install instead of hard-coding in makefile
this follows the principle of having the source tree layout define
build semantics. it also makes it possible for crt/$(ARCH) to define
additional installable files, which may be needed for midipix and
other future targets.
2016-02-19 14:16:33 -05:00
Rich Felker
4c101e158a add arch tuple matching for nt32 and nt64 in configure
the nt32 and nt64 archs will be provided by the midipix project for
building musl on top of its posix-like syscall layer for windows. at
present the needed arch files are in a separate repository, but having
the tuple matching in the upstream configure script should make it
possible to overlay the arch files without needing any further
patching.
2016-02-19 00:10:23 -05:00
Rich Felker
71c334f951 work around regression building for armhf with clang (compiler bug)
commit e4355bd6be moved the math asm
from external source files to inline asm, but unfortunately, all
current releases of clang use the wrong inline asm constraint codes
for float and double ("w" and "P" instead of "t" and "w",
respectively). this patch adds detection for the bug in configure,
and, for now, just disables the affected asm on broken clang versions.
2016-02-19 01:20:07 +00:00
Rich Felker
ed97dfd979 improve macro logic for enabling arm math asm
in order to take advantage of the fpu in -mfloat-abi=softfp mode, the
__VFP_FP__ (presence of vfp fpu) was checked instead of checking for
__ARM_PCS_VFP (hardfloat EABI variant). however, the latter macro is
the one that's actually specified by the ABI documents rather than
being compiler-specific, and should also be checked in case __VFP_FP__
is not defined on some compilers or some configurations.
2016-02-18 23:53:03 +00:00
Rich Felker
790580b2fc update authors/contributors list
these additions were made based on scanning commit authors since the
last update, at the time of the 1.1.7 release, and adding everyone
with either substantial code contributions or a pattern of ongoing
simple patch submission.
2016-02-18 15:14:15 -05:00
Rich Felker
2d0290debf fix regression in SH/FDPIC dynamic linker
the dynamic linker was found to hang when used as the PT_INTERP, but
not when invoked as a command. the mechanism of this failure was not
determined, but the cause is clear:

commit 5552ce5200 removed the SHARED
macro, but arch/sh/crt_arch.h is still using it to choose the right
form of the crt/ldso entry point code. moving the forced definition
from rcrt1.c to dlstart.c restores the old behavior. eventually the
logic should be changed to fully remove the SHARED macro or at least
rename it to something more reasonable.
2016-02-18 04:13:05 +00:00
Rich Felker
5030e4a060 partly revert detection of broken float in configure
commit 80fbaac4cd broke all soft-float
archs, where gcc defines __GCC_IEC_559==0 because rounding modes and
exception flags are not supported. for now, just check for
__FAST_MATH__ as an indication of broken float. this won't detect all
possible misconfigurations but it probably catches the most common
one.
2016-02-18 04:09:33 +00:00
Rich Felker
157e28492a support clean/distclean make targets in unconfigured tree
commit 2f853dd6b9 moved the error
handling for $(ARCH) not being set such that it applied to all
targets, including clean and distclean. previously these targets
worked even in an unconfigured tree. to restore the old behavior, make
most of the makefile body conditional on $(ARCH) being set/non-empty
and produce the error via a fake "all" target in the conditional
branch for the case where $(ARCH) is empty.
2016-02-17 16:11:45 -05:00
Rich Felker
63bcda4d8f adjust makefile to make crt/ and ldso/ sources arch-replaceable
prior to commit 2f853dd6b9 which
overhauled the makefile for out-of-tree builds, crt/*.c files were
replaceable by crt/$(ARCH)/*.s, and top-level ldso/ did not exist (its
files were under src/ldso). since then, crti.o and crtn.o have been
hard-coded as arch-specific, but none of the other files in crt/ or
ldso/ were replaceable at all.

in preparation for easy integration with midipix, which has a port of
musl to windows, it needs to be possible to override the ELF-specific
code in these files. making the same arch-replacements system work
throughout the whole source tree also improves consistency and removes
the need for some file-specific rules (crti.o and crtn.o) in the
makefile.
2016-02-17 13:56:27 -05:00
Rich Felker
80fbaac4cd make configure attempt to catch broken floating point CFLAGS/defaults 2016-02-17 13:53:54 -05:00
Rich Felker
cf115059ba in crypt-sha*, reject excessive rounds as error rather than clamping
the reference implementation clamps rounds to [1000,999999999]. we
further limited rounds to at most 9999999 as a defense against extreme
run times, but wrongly clamped instead of treating out-of-bounds
values as an error, thereby producing implementation-specific hash
results. fixing this should not break anything since values of rounds
this high are not useful anyway.
2016-02-16 17:38:07 -05:00
Rich Felker
ef2b5e9f13 fix unlikely corner cases in getopt's message printing
like fputs (see commit 10a17dfbad), the
message printing code for getopt assumed that fwrite only returns 0 on
failure, but it can also happen on success if the total length to be
written is zero. programs with zero-length argv[0] were affected.

commit 500c6886c6 introduced this
problem in getopt by fixing the fwrite behavior to conform to the
requirements of ISO C. previously the wrong expectations of the getopt
code were met by the fwrite implementation.
2016-02-16 13:27:24 -05:00
Rich Felker
10a17dfbad fix assumption in fputs that fwrite returning 0 implies an error
internally, the idiom of passing nmemb=1 to fwrite and interpreting
the return value of fwrite (which is necessarily 0 or 1) as
failure/success is fairly widely used. this is not correct, however,
when the size argument is unknown and may be zero, since C requires
fwrite to return 0 in that special case. previously fwrite always
returned nmemb on success, but this was changed for conformance with
ISO C by commit 500c6886c6.
2016-02-16 13:26:16 -05:00
Rich Felker
9c102700a7 release 1.1.13 2016-02-15 23:12:42 -05:00
Rich Felker
0ed932f34f do not define static_assert macro for pre-C11 compilers
some software simply uses static_assert if the macro is defined, and
this breaks if the compiler does not recognize the _Static_assert
keyword used to define it.
2016-02-12 10:11:40 -05:00
Rich Felker
692b16d14b add declarations for utmpname/utmpxname to appropriate headers
commit 378f8cb522 added these functions
(as stubs) but left them without declarations. this broke some
autoconf based software that detected linkability of the symbols but
didn't check for a declaration.
2016-02-12 09:58:50 -05:00