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2022-09-27arc: add support for ARCv3 32-bit processorsSergey Matyukevich
New ARCv3 ISA includes both 64-bit and 32-bit CPU family. This patch adds support for 32-bit ARCv3 HS5x processors. Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com> Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
2021-04-09open: Add support for O_TMPFILENicolas Cavallari
Since Linux 3.11, O_TMPFILE allows to create unnamed files that can be linked later on. It is internally defined as (O_TMPFILE | O_DIRECTORY) to make it fail on old kernels. Copying definitions from glibc for O_TMPFILE is not enough to support O_TMPFILE; The open() wrapper also need to pass the mode when the flag contains O_TMPFILE, otherwise, it will pass mode 000 which will succeed but yield unexpected results. openat() is curiously not affected since it passes the mode unconditionally.. Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
2021-02-19fcntl.h: Make F_DUPFD_CLOEXEC if _USE_XOPEN2K8Paul Cercueil
The F_DUPFD_CLOEXEC flag was added in POSIX 2008.09. Signed-off-by: Paul Cercueil <paul@crapouillou.net>
2020-02-03csky: add statx conditionalsWaldemar Brodkorb
Similar to glibc commit https://sourceware.org/git/?p=glibc.git;a=commit;h=6bbfc5c09fc5b5e3d4a0cddbbd4e2e457767dae7 we need to handle Linux kernel change, which removed stat64 family from default syscall set. Signed-off-by: Waldemar Brodkorb <wbx@openadk.org> Signed-off-by: Waldemar Brodkorb <wbrodkorb@conet.de>
2019-10-30Make __syscall_error return long, as expected by syscall() callersCarlos Santos
The return type of syscall() is long so __syscall_error, which is jumped to by syscall handlers to stash an error number into errno, must return long too otherwhise it returs 4294967295L instead of -1L. For example, syscall for x86_64 is defined in libc/sysdeps/linux/x86_64/syscall.S as syscall: movq %rdi, %rax /* Syscall number -> rax. */ movq %rsi, %rdi /* shift arg1 - arg5. */ movq %rdx, %rsi movq %rcx, %rdx movq %r8, %r10 movq %r9, %r8 movq 8(%rsp),%r9 /* arg6 is on the stack. */ syscall /* Do the system call. */ cmpq $-4095, %rax /* Check %rax for error. */ jae __syscall_error /* Branch forward if it failed. */ ret /* Return to caller. */ In libc/sysdeps/linux/x86_64/__syscall_error.c, __syscall_error is defined as int __syscall_error(void) attribute_hidden; int __syscall_error(void) { register int err_no __asm__ ("%rcx"); __asm__ ("mov %rax, %rcx\n\t" "neg %rcx"); __set_errno(err_no); return -1; } So __syscall_error returns -1 as a 32-bit int in a 64-bit register, %rax (0x00000000ffffffff, whose decimal value is decimal 4294967295) and a test like this always returns false: if (syscall(number, ...) == -1) foo(); Fix the error by making __syscall_error return a long, like syscall(). The problem can be circumvented by the caller by coercing the returned value to int before comparing it to -1: if ((int) syscall(number, ...) == -1) foo(); The same problem probably occurs on other 64-bit systems but so far only x86_64 was tested, so this change must be considered experimental. Signed-off-by: Carlos Santos <unixmania@gmail.com>
2017-06-08fcntl.h: fixup namespace for O_DIRECTORY/O_NOFOLLOW/O_CLOEXECWaldemar Brodkorb
Sync with GNU C library. Found while trying to compile linux-rdma to uClibc-ng. Reported-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
2016-11-13NPTL/ARC: provide a kernel assisted atomic cmpxchgVineet Gupta
For hardware configurations lacking LLOCK/SCOND (say ARC750), use a syscall to atomically do the cmpxchg. This is costly and painful, but really the only way out. Note that kenrel only guarantees this to work in a UP configuraion Reported-by: Avinash Patil <avinashp@quantenna.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-11-13NPTL/ARC: implement __arch_exchange_32_acq using native EXVineet Gupta
ARC EX instruction maps directly to this primitive, thus helps elide the llock/scond based retry loop where possible. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-08-17ARC: Support syscall ABI v4Vineet Gupta
The syscall ABI includes the gcc functional calling ABI since a syscall implies userland caller and kernel callee. The current gcc ABI (v3) for ARCv2 ISA required 64-bit data be passed in even-odd register pairs, (potentially punching reg holes when passing such values as args). This was partly driven by the fact that the double-word LDD/STD instructions in ARCv2 expect the register alignment and thus gcc forcing this avoids extra MOV at the cost of a few unused register (which we have plenty anyways). This however was rejected as part of upstreaming gcc port to HS. So the new ABI v4 doesn't enforce the even-odd reg restriction. Do note that for ARCompact ISA builds v3 and v4 are practically the same in terms of gcc code generation. This change is dormant for now (gcc 4.8.x based tools) and will only kick in with switch to gcc 6.x based tools. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-12-07add definitions for O_PATHWaldemar Brodkorb
Only alpha, hppa and sparc need non-default value.
2015-12-05remove __UCLIBC_ASM_GLOBAL_DIRECTIVE__Waldemar Brodkorb
.globl can be used for every architecture so remove the define. Sync with GNU C library.
2015-12-05remove __UCLIBC_HAVE_ASM_GLOBAL_DOT_NAME__Waldemar Brodkorb
It's even no longer required for non-ported ppc64 architecture. Sync with GNU C library. This simplify the macros in include/libc-symbols.h.
2015-10-22NPTL/ARCv2: Implement full memory barrier for NPTLVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-02-20ARCv2 ISA supportVineet Gupta
This is next gen Instruction Set Architecture from Synopsys and basis for the ARC HS family of processors. http://www.synopsys.com/dw/ipdir.php?ds=arc-hs38-processor&elq_mid=5732&elq_cid=458802 http://www.synopsys.com/IP/ProcessorIP/ARCProcessors/arc-hs/Pages/default.aspx Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2015-02-16ARC: remove stale TRUNCATE64_HAS_4_ARGSVineet Gupta
Not relevant anymore since commit e8cc14e59ed3f66b84e, "libc: rename TRUNCATE64_HAS_4_ARGS to SYSCALL_ALIGN_64BIT" Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2015-02-16ARC: add configuration option for MMU page sizeAlexey Brodkin
ARC CPU may have MMU page size of 4/8(default)/16k. uClibc needs to have page size configured accodring to HW it will be run on. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2014-08-25fcntl.h: Define F_SETPIPE_SZ and F_GETPIPE_SZKhem Raj
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2014-08-18NPTL: ARC supportVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2014-07-22ARC: syscalls.h: code-reuse/fix-arg-annotationsVineet Gupta
- Use syscalls-common.h vers of INTERNAL_SYSCALL / INLINE_SYSCALL_NOERR - INLINE_SYSCALL takes syscall name (e.g. write) - {INLINE,INTERNAL}_SYSCALL_NCS macros take syscall num (__NR_write) Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2013-12-20ARC port to uClibcVineet Gupta
For this port, I would like to give due credit to: - Folks from Codito technologies (Sameer, Amit, Kanika, Ramana,...) who did the very first port - ARC UK from 2007-2009 (Joern, Irfan, Khurram, Phil... - Late Brendan Kehoe (may he RIP) Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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