- 03 4月, 2016 1 次提交
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由 Rich Felker 提交于
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.
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- 02 4月, 2016 1 次提交
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由 Rich Felker 提交于
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.
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- 30 3月, 2016 1 次提交
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由 Rich Felker 提交于
commits e24984ef and 16b55298 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.
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- 29 3月, 2016 1 次提交
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由 Rich Felker 提交于
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.
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- 25 3月, 2016 1 次提交
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由 Timo Teräs 提交于
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- 19 3月, 2016 8 次提交
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由 Szabolcs Nagy 提交于
allows the os to free the marked pages lazily on memory pressure. expected to increase malloc performance. new in linux commit 854e9ed09dedf0c19ac8640e91bcc74bc3f9e5c9
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由 Szabolcs Nagy 提交于
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
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由 Szabolcs Nagy 提交于
new socket options for setting classic or extended BPF program for sockets in a SO_REUSEPORT group. added in linux commit 538950a1b7527a0a52ccd9337e3fcd304f027f13
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由 Szabolcs Nagy 提交于
new in linux commit 715f504b118998c41a2079a17e16bf5a8a114885 same as IP_HDRINCL but for SOL_IPV6 sockets.
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由 Szabolcs Nagy 提交于
it was introduced for offloading copying between regular files in linux commit 29732938a6289a15e907da234d6692a2ead71855 (microblaze and sh does not yet have the syscall number.)
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由 Szabolcs Nagy 提交于
add userfaultfd, membarrier and mlock2 system call numbers.
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由 Rich Felker 提交于
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由 Szabolcs Nagy 提交于
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.
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- 17 3月, 2016 1 次提交
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由 Rich Felker 提交于
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.
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- 11 3月, 2016 2 次提交
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由 Rich Felker 提交于
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.
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由 Rich Felker 提交于
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.
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- 07 3月, 2016 6 次提交
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由 Rich Felker 提交于
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.
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由 Felix Fietkau 提交于
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.
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由 Alexander Monakov 提交于
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.
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由 Rich Felker 提交于
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由 Rich Felker 提交于
patch by Mahesh Bodapati and Jaydeep Patil of Imagination Technologies.
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由 Rich Felker 提交于
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.
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- 05 3月, 2016 1 次提交
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由 Szabolcs Nagy 提交于
expf(-NAN) was treated as expf(-large) which unconditionally returns +0, so special case +-NAN. reported by Petr Hosek.
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- 03 3月, 2016 2 次提交
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由 Nathan Zadoks 提交于
This brings the call to an actually usable speed. Quick unscientific benchmark: 14ns : 102ns :: vDSO : syscall
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由 Nathan Zadoks 提交于
This is a GNU extension, but a fairly minor one, for a system call that otherwise has no libc wrapper.
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- 02 3月, 2016 4 次提交
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由 Szabolcs Nagy 提交于
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.
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由 Szabolcs Nagy 提交于
commit 7eaa76fc 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 ^*.
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由 Michael Meeuwisse 提交于
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由 Rich Felker 提交于
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.
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- 24 2月, 2016 2 次提交
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由 Rich Felker 提交于
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 225f6a6b. these definitions may however be useful if we ever need to add other pointer-sized atomic operations.
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由 Bobby Bingham 提交于
No current ports do this, but it will be useful for porting to 64-bit ll/sc architectures, such as mips64 and powerpc64.
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- 22 2月, 2016 1 次提交
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由 Rich Felker 提交于
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- 20 2月, 2016 1 次提交
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由 Rich Felker 提交于
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.
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- 19 2月, 2016 4 次提交
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由 Rich Felker 提交于
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.
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由 Rich Felker 提交于
commit e4355bd6 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.
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由 Rich Felker 提交于
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.
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由 Rich Felker 提交于
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.
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- 18 2月, 2016 3 次提交
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由 Rich Felker 提交于
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 5552ce52 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.
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由 Rich Felker 提交于
commit 80fbaac4 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.
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由 Rich Felker 提交于
commit 2f853dd6 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.
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