2016-06-01 12:31 GMT+01:00 Stefan Kalkowski < stefan.kalkowski@...1...>:
Hello Tiago,
On 06/01/2016 01:07 PM, Tiago Brito wrote:
Hi, I've been trying to use libpng inside the secure world of i.MX53 QSB TrustZone aware TZ_VMM example.
I want to receive an image from the normal world (running Linux) and do some process the image in some way inside the secure world.
I understand the flow of genode and tz_vmm in particular and there are
some
examples on how to communicate data between the normal and secure world,
so
that's not my problem right now. My problem is that I cannot run tz_vmm after adding libpng as a lib.
In order to use libpng inside tz_vmm I did the following: 1) in $(BUILDDIR)/etc/build.conf uncommented this line REPOSITORIES += $(GENODE_DIR)/repos/libports
2) inside $(GENODE_DIR)/repos/libports I did: make prepare PKG="libc zlib libpng" 3) inside $(BUILDDIR)/repos/os/src/server/tz_vmm/spec/imx53 I addedthe
following to target.inc LIBS += libc LIBS += zlib LIBS += libpng
4) then I added #include <png.h> inside main.cc 5) finally inside $(BUILDDIR) I did make run/tz_vmmAll these steps compiled fine, but when I run this on my board the following message comes up:
## Booting kernel from Legacy Image at 70200000 ... Image Name: Image Type: ARM Linux Kernel Image (gzip compressed) Data Size: 7888432 Bytes = 7.5 MiB Load Address: 70010000 Entry Point: 70010000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK
Starting kernel ...
kernel initialized Genode 16.02 int main(): --- create local services --- int main(): --- start init --- int main(): transferred 242 MB to init int main(): --- init created, waiting for exit condition --- [init] Could not open ROM session for module "ld.lib.so" [init] parent provides [init] service "ROM" [init] service "RAM" [init] service "IRQ" [init] service "IO_MEM" [init] service "IO_PORT" [init] service "CAP" [init] service "PD" [init] service "RM" [init] service "CPU" [init] service "LOG" [init] service "SIGNAL" [init] service "VM" [init] Dynamically linked file found, but no dynamic linker binary
present
[init] unknown exception? [init] child "tz_vmm" [init] RAM quota: 10203136 [init] ELF binary: tz_vmm [init] priority: 0
What have I done wrong? It seems I need to add a binary somewhere, but I don't know where. Do I need to compile anything else in order to libpng
to
be usable inside genode?
Thanks in advance!
You missed to add the dynamic linker itself to the files to be loaded. It is called ld.lib.so and can be found in your build-directory under bin/. PLease also add all other *.lib.so files to your bootloader configuration resp. the run-script.
Thanks Stefan, I did what you say and it compiled without any problem, but I still cannot run the example. I changed the tz_vmm run script like so: set boot_modules { core init ld.lib.so libc.lib.so zlib.lib.so libpng.lib.so tz_vmm linux }
It now fails even before launching Genode. This is the output:
## Booting kernel from Legacy Image at 70200000 ... Image Name: Image Type: ARM Linux Kernel Image (gzip compressed) Data Size: 8523403 Bytes = 8.1 MiB Load Address: 70010000 Entry Point: 70010000 Verifying Checksum ... OK Uncompressing Kernel Image ... Error: inflate() returned -3 gzip compressed: uncompress error -1 Must RESET board to recover resetting ...
Does this mean the image is corrupted in any way and thus it cannot be uncompressed?
Thanks, Tiago
Regards Stefan