arm64

How to implement system call in ARM64?

我怕爱的太早我们不能终老 提交于 2019-11-29 04:21:20
I am working with arm64 assembly coding and I want to implement system calls using svc instruction . I can't find any working arm64 system call implementation online.Also, I can't find the system call list for arm64. Also explain the implementation . You can pass six arguments in x0 to x5 , return value is saved in x0 . To give an assembler snippet, this is write syscall from Android Bionic's libc implementation . write 's three arguments would already be in x0-x2 . Syscall number is passed in x8 . /* Generated by gensyscalls.py. Do not edit. */ #include <private/bionic_asm.h> .hidden __set

Parse API 1.6.4 - cannot build project

对着背影说爱祢 提交于 2019-11-28 20:31:43
I downloaded the new iOS Parse API (1.6.4) and tried to build my project. When I do, I get this error: Undefined symbols for architecture arm64" "_BFTaskMultipleExceptionsException", referenced from: ___53+[PFObject(Private) deleteAllAsync:withSessionToken:]_block_invoke214 in Parse(PFObject.o) ___65+[PFObject(Private) _deepSaveAsync:withCurrentUser:sessionToken:]_block_invoke311 in Parse(PFObject.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) Screenshot: Temporary workaround for Parse 1.6.4 and Facebook SDK 3

How to update our static library architecture for suporting arm64 Build?

青春壹個敷衍的年華 提交于 2019-11-28 17:36:27
Few days ago i create static-library (Universal) that work's fine with Xcode5.0 SDK7 . After Update Xcode5.1 with SDK7.1 that not work if i select simulator iPhone Retina(4-inch 64-bit) . Then i am going to update my lib with Bellow setting change. I do the same for three Target:- For sporting simulator as well as device i put Universal lib and in to this i run script this:- After this i Build Again lib and used as i done Before in to my project. But still getting same issue with iPhone Retina(4-inch 64-bit) Undefined symbols for architecture x86_64: So, My question is that is there any

CocoaPods arm64 issue

孤街浪徒 提交于 2019-11-28 15:27:56
问题 When using Podfile for developing iOS 7 app with Xcode5, we always got this issue. After some searching, seems like no final resolve from CocoaPods ? Maybe resolved at this moment when you see this. How to resolve such issues right now ? The issue was: Pods was rejected as an implicit dependency for 'libPods.a' because its architectures 'armv7 armv7s' didn't contain all required architectures 'armv7 armv7s arm64' 回答1: Select the Pods project Change Build Active Architecture Only from Yes to

what is the current execution mode/exception level, etc?

China☆狼群 提交于 2019-11-28 14:18:01
I am new to ARMv8 architecture. I have following basic questions on my mind: How do I know what is the current execution mode AArch32 or AArch64? Should I read CPSR or SPSR to ascertain this? What is the current Exception level, EL0/1/2/3? Once an exception comes, can i read any register to determine whether I am in Serror/Synchronous/IRQ/FIQ exception handler. TIA. The assembly instructions and their binary encoding are entirely different for 32 and 64 bit. So the information what mode you are currently in is something that you/ the compiler already needs to know during compilation. checking

Unknown register name “q0” in asm (arm64)

风流意气都作罢 提交于 2019-11-28 09:24:41
问题 I'm currently trying to compile my lib for the new arm64 arch. I have a bunch of NEON assembly and for all of them I receive an error Unknown register name "q0" in asm. Even if I write smth simple as this: asm ( "" : : : "q0", "q1", "q2", "q3" ); I thought arm64 supports NEON. Am i missing something ? 回答1: “v0”: scanon$ cat bar.c int foo(void) { __asm__("":::"q0"); return 0; } scanon$ xcrun -sdk iphoneos clang bar.c -arch arm64 -c bar.c:2:16: error: unknown register name 'q0' in asm __asm__("

Does AArch64 support unaligned access?

余生长醉 提交于 2019-11-28 07:46:22
问题 Does AArch64 support unaligned access natively? I am asking because currently ocamlopt assumes "no". 回答1: Providing the hardware bit for strict alignment checking is not turned on (which, as on x86, no general-purpose OS is realistically going to do), AArch64 does permit unaligned data accesses to Normal (not Device) memory with the regular load/store instructions. However, there are several reasons why a compiler would still want to maintain aligned data: Atomicity of reads and writes:

Building ffmpeg iOS libraries for armv7, armv7s, arm64, i386 and universal

馋奶兔 提交于 2019-11-27 20:49:46
I have seen several scripts to build FFmpeg API for armv7, 7s and i386 but couldn't find anything which would work for armv64 as well. Some of the answers on other threads of this forum suggested to prepare a separate library for arm64 but it does not work well with rest of the architectures. Hence I need a script which can work for all the supported architectures for iOS including armv7, armv7s, armv64 and i386. I have use below scripts for making FFmpeg build for arm64 https://github.com/kewlbear/FFmpeg-iOS-build-script https://github.com/bbcallen/ijkplayer/blob

Parse API 1.6.4 - cannot build project

拈花ヽ惹草 提交于 2019-11-27 20:44:32
问题 I downloaded the new iOS Parse API (1.6.4) and tried to build my project. When I do, I get this error: Undefined symbols for architecture arm64" "_BFTaskMultipleExceptionsException", referenced from: ___53+[PFObject(Private) deleteAllAsync:withSessionToken:]_block_invoke214 in Parse(PFObject.o) ___65+[PFObject(Private) _deepSaveAsync:withCurrentUser:sessionToken:]_block_invoke311 in Parse(PFObject.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit

How to implement system call in ARM64?

六月ゝ 毕业季﹏ 提交于 2019-11-27 18:14:15
问题 I am working with arm64 assembly coding and I want to implement system calls using svc instruction . I can't find any working arm64 system call implementation online.Also, I can't find the system call list for arm64. Also explain the implementation . 回答1: You can pass six arguments in x0 to x5 , return value is saved in x0 . To give an assembler snippet, this is write syscall from Android Bionic's libc implementation. write 's three arguments would already be in x0-x2 . Syscall number is