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I need your opinion please help me
by Nuri Başçay 11 Aug '21

11 Aug '21

Hi Genode Developers. I'm Nuri and I'm an intern student. My boss wants me to learn genode and develop apps. Firstly, thanks for your replies. Thanks to your reply, I ran Hello World in the Linux Genode scenario. The main point is that, It is my first time using Ubuntu and working on an operating system framework. I'm a computer engineering student (my 2nd year finished now). I know flutter, java and python etc. Is there a way to say kindly to my boss that it is impossible to develop genode projects with my knowledge? If yes, please let me know your opinion (what can I say to my boss for example I talked the genode developers so, they said that you need to study more something to start to develop genode) If it is easy to develop apps for genode, please let me know how I can do that. I read genode foundations book and study in this link " https://genode.org/documentation/developer-resources/index " but I just did Hello World project on genode after 3 weeks. So please help me ASAP dear Genode Developers. By the help of this link below, I tried to run "Creating your first client-server scenario <https://genode.org/documentation/developer-resources/client_server_tutorial> " but got an error and couldn't do anything. https://genode.org/documentation/developer-resources/index And here it is the error that I mentioned ( generating initrd cp: cannot stat 'genode/initramfs': No such file or directory ) input; $ make run/hello KERNEL=linux output; including /home/nuri/genode/tool/run/power_on/qemu including /home/nuri/genode/tool/run/log/qemu including /home/nuri/genode/tool/run/image/disk including /home/nuri/genode/tool/run/boot_dir/linux including /home/nuri/genode/repos/lab/run/hello.run building targets: core init app/hello spawn make core init app/hello make[1]: Entering directory '/home/nuri/genode/build/x86_64' checking library dependencies... Library ldso_so_support Library syscall-linux Library startup-linux Library cxx Library ld Library base Program app/hello/hello Program init/init Library base-linux-common Library core-linux Program core/linux/core-linux COMPILE version.o LINK core-linux make[1]: Leaving directory '/home/nuri/genode/build/x86_64' genode build completed checking configuration syntax CHECK init building targets: lib/ld/linux spawn make lib/ld/linux make[1]: Entering directory '/home/nuri/genode/build/x86_64' checking library dependencies... Library syscall-linux Library startup-linux Library timeout Library cxx Library seccomp Library ldso_so_support Library base-linux-common Library base-linux Library ld-linux Program lib/ld/linux/ld-linux make[1]: Leaving directory '/home/nuri/genode/build/x86_64' genode build completed using 'core-linux' as 'core' using 'ld-linux.lib.so' as 'ld.lib.so' using 'core-linux' as 'core' using 'ld-linux.lib.so' as 'ld.lib.so' generating initrd cp: cannot stat 'genode/initramfs': No such file or directory while executing "exec cp genode/initramfs init" (procedure "build_initrd" line 16) invoked from within "build_initrd $binaries" (procedure "run_boot_dir" line 28) invoked from within "run_boot_dir $binaries" (procedure "build_boot_image" line 35) invoked from within "build_boot_image "core ld.lib.so init hello"" (file "/home/nuri/genode/repos/lab/run/hello.run" line 20) invoked from within "source $include_name" ("foreach" body line 6) invoked from within "foreach include_name [get_cmd_arg --include ""] { # first check if the include name is absolute if {[string first "/" $include_name] == 0} { puts ..." (file "/home/nuri/genode/tool/run/run" line 1062) make: *** [Makefile:393: run/hello] Error 1

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ASAP Please Help me After Hello World in Genode
by Nuri Başçay 10 Aug '21

10 Aug '21

Hello Developers, I'm an intern student and my boss wants me to learn genode. Finally I installed Genode on Ubuntu and made a Hello World example thanks to your community and genode documentation. However, I think that I need some more hints to go further. I want to be a genode developer but I don't know how to program in genode or sculpt os like in c++( Genode uses C++ as I know) I mean how to run c++ code in genode or sculpt? I would like to ask you kindly, How can I start programming and develop myself? (That means going one step further than hello world, maybe antoter basic example to run and compile by genode sculpt) Please, Answer the mail as simple as possible and sorry for my bad English. I'm looking forward to your reply. Thank you.

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ASAP Please Help Me (I'm in intern but know nothing about GENODE)
by Nuri Başçay 10 Aug '21

10 Aug '21

Hello Dear Genode Developers, First, I would like to say sorry for taking your time. I'm Nuri and 21 years old. I'm a ceng student and my boss wants me to start to develop apps by using genode or sculpt i don't know.However, I could not even print Hello World! during 9 days (except by using bash with echo command) Can you please help me about these topics and thanks from now on. Will I develop apps for genode, or sculpt os? As I know, I need to know C++ language to develop apps in genode or sculpt os but do not know where I can programing c++ in genode, I can only open terminal (bash). How and where to start programming (first hello world) to develop apps? I have; *Windows 10 *Ubuntu 20.04 *Genode Sculpt 21.03b as virtualBox *I built sculpt os 19.07 image and I have this bootable usb stick by the help of this video below youtube.com/watch?v=7g8hDQQt-VI&ab_channel=genode-alex I'm curiously waiting for your reply. Best regards. Thank you Nuri Bas

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how to find the thread stack limit?
by Dan Connolly 10 Aug '21

10 Aug '21

I'm trying to port this XS JavaScript engine to genode. It wants to know the stack limit. Any suggestions on how to do this? https://github.com/Moddable-OpenSource/moddable/blob/public/xs/sources/xsCo… char* fxCStackLimit() { #if mxWindows ULONG_PTR low, high; GetCurrentThreadStackLimits(&low, &high); return (char*)low + (32 * 1024); #elif mxMacOSX pthread_t self = pthread_self(); void* stackAddr = pthread_get_stackaddr_np(self); size_t stackSize = pthread_get_stacksize_np(self); return (char*)stackAddr - stackSize + (8 * 1024); #elif mxLinux pthread_attr_t attrs; if (pthread_getattr_np(pthread_self(), &attrs) == 0) { void* stackAddr; size_t stackSize; if (pthread_attr_getstack(&attrs, &stackAddr, &stackSize) == 0) { return (char*)stackAddr + (4 * 1024); } } return C_NULL; #else return C_NULL; #endif } -- Dan Connolly http://www.madmode.com/

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link error when trying to run XS JavaScript engine
by Dan Connolly 10 Aug '21

10 Aug '21

XS is a JavaScript engine designed for microcontrollers. I have been working on getting it running under genode in fits and starts. https://github.com/dckc/genode-js-xs In my most recent episode, I can get goa build to work, but when I try goa run, I get: [init -> genode-js-xs] Error: LD: ELF without DYNAMIC segment appears to be statically linked (ld="no") `file hello` says: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter ld.lib.so, with debug_info, not stripped I put the full link command in https://github.com/dckc/genode-js-xs/pull/12 Any clues on how to diagnose / fix? What does (ld="no") mean? -- Dan Connolly http://www.madmode.com/

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How to switch thread stack between threads?
by Alexander Tormasov 21 Jul '21

21 Jul '21

Hello, I see that it is possible to have 1 thread with multiple stacks, using alloc_secondary_stack() call. But if I want to switch stack From one OS thread to another one for setcontext()? Stack do contain hidden data related to Stack structure and to the native UCB (completely opaque). If I try to use it, it try to find stored structure which contains thread reference, which point to old thread. I need to point it to the new thread In particular , it interfere with thread local storage TLS data, it use wrong content from old thread because it use stack content for thread identification , and fail… How to do this, any ideas? I can’t re-create it - it contains state of the thread , not the best idea to copy content of stack during every context switch … Alexander Отправлено с iPhone

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#genode IRC channel now on libera.chat
by Josef Söntgen 06 Jul '21

06 Jul '21

Hello, as the subject line already reveals, we switched the IRC network and are now domiciled on libera.chat [1]. You are free to drop by and join the #genode channel via the web-client [2] without prior registration for one or the other round of Genode-related smalltalk. [1] https://libera.chat [2] https://web.libera.chat/#genode Regards Josef -- Josef Söntgen Genode Labs http://www.genode-labs.com/ · http://genode.org/

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Error: LD: symbol not found: '__data_start'
by Alexander Tormasov 21 Jun '21

21 Jun '21

when running test application I encounter a new problem of dynamic linker [init -> test-go] 0x1000000 .. 0x10ffffff: linker area [init -> test-go] Error: LD: symbol not found: '__data_start' [init -> test-go] Error: Uncaught exception of type 'Linker::Not_found' any ideas how to fix? seems that main binary test-go do have a weak ref to this symbol as nm show: w __data_start in some places of new code appeared after 10.3 gcc I found extern const char __data_start[] __attribute__ ((weak)); where I can add it, in what ld script? Sincerely, Alexander

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Found something
by Uwe 19 Jun '21

19 Jun '21

I have found a testable(!),small(!) TCB implementation of TLS. Would it be cool if genode had a verified(!), isolated(!) daemon, that does all things related to external communication, of course encrypted?

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21.05 toolchain C tls variables compilation problem
by Alexander Tormasov 11 Jun '21

11 Jun '21

small c file: typedef int G; __thread G *g __asm__("" "runtime.g"); G* runtime_g(void) __attribute__ ((noinline, no_split_stack)); G* runtime_g(void) { return g; } during compilation using genode-x86-gcc 10.3 error in asm (and checked genode-x86-as as well): tt1.s: Assembler messages: tt1.s:22: Error: junk at end of line, first unrecognized character is `*' tt1.s:25: Error: unrecognized symbol type "" tt1.s:25: Error: junk at end of line, first unrecognized character is `*' tt1.s:26: Error: expected comma after name `__emutls_v.' in .size directive tt1.s:27: Error: invalid character '*' in mnemonic tt1.s:13: Error: invalid operands (*UND* and *UND* sections) for `*’ generated asm: .file "tt1.c" .text .globl runtime_g .type runtime_g, @function runtime_g: .LFB0: .cfi_startproc pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset 6, -16 movq %rsp, %rbp .cfi_def_cfa_register 6 movl $__emutls_v.*runtime.g, %edi call __emutls_get_address movq (%rax), %rax popq %rbp .cfi_def_cfa 7, 8 ret .cfi_endproc .LFE0: .size runtime_g, .-runtime_g .globl __emutls_v.*runtime.g ^^^^^^^ first error line ^^^^^^^^^^^^^^^^^ .data .align 32 .type __emutls_v.*runtime.g, @object .size __emutls_v.*runtime.g, 32 __emutls_v.*runtime.g: .quad 8 .quad 8 .quad 0 .quad 0 .ident "GCC: (GNU) 10.3.0"

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