Problem importing a library into TF-M: Not enough space to import i

Question

Hi, 
 I am developing a project that uses TF-M to run some functions from a secure partition. The structure of the project is shown below: 
 ├── lib │ ├── ... │ ├── blst.h │ ├── libblst.a ├── mycli │ ├── CMakeLists.txt │ ├── README.rst │ ├── prj.conf │ ├── sample.yaml │ └── src │ ├── main.c │ ├── secure_partition_interface.c │ └── secure_partition_interface.h └── secure_partition ├── CMakeLists.txt ├── README.md ├── secure_partition.c ├── tfm_manifest_list.yaml.in └── tfm_secure_partition.yaml 
 
 I need to import a static library whose functions I am going to use only from the secure partition. Therefore, I intend to import them into the safe partition. 
 To use its functions, I include the library in the file I use it: 
 #include "blst.h" 
 If I use its functions, it tells me that they are not defined. I understand that it is because I have not included them in secure_partition/CMakeLists.txt. To include them, I write the following configuration in that file: 
 
 target_include_directories(tfm_app_rot_partition_sp PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../lib)

target_link_libraries(tfm_app_rot_partition_sp
PRIVATE
${CMAKE_CURRENT_SOURCE_DIR}/../lib/libblst.a
) 
 
 I don't know if I am doing something wrong when I include the library or if I just need more space. If I am doing the import wrong, I would like to know how to fix it. If I need more space, I would like to know how to get it, either by decreasing the size of my secure partition, or by increasing the size of the flash memory dedicated to it (the libblst.a file size is about 110 kB). 
 
 Regards, 
 Pablo 
 
 Useful information about the project : - I'm using the nRF5340DK development kit. - nRF SDK v2.0.0 - The project is based on the example: TF-M Secure Partition Sample. When doing the build for this example, the available and used space shown is as follows: 
 Memory region Used Size Region Size %age Used FLASH: 21648 B 736 KB 2.87% SRAM: 4816 B 256 KB 1.84% IDT_LIST: 0 GB 2 KB 0.00% 
 
 Error trace : 
 e:/programs/nordic/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: bin	fm_s.axf section `.tfm_rodata' will not fit in region `FLASH' e:/programs/nordic/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: address 0x4bee0 of bin	fm_s.axf section `.gnu.sgstubs' is not within region `FLASH' e:/programs/nordic/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: address 0x4bee0 of bin	fm_s.axf section `.gnu.sgstubs' is not within region `FLASH' e:/programs/nordic/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: region `FLASH' overflowed by 49152 bytes Memory region Used Size Region Size %age Used FLASH: 304 KB 256 KB 118.75% RAM: 45180 B 256 KB 17.23% collect2.exe: error: ld returned 1 exit status ninja: build stopped: subcommand failed. FAILED: modules/trusted-firmware-m/tfm-prefix/src/tfm-stamp/tfm-build tfm/secure_fw/s_veneers.o tfm/app/libtfm_api_ns.a tfm/generated/interface/include/psa_manifest/sid.h tfm/platform/libplatform_ns.a tfm/bin/tfm_s.elf tfm/bin/tfm_s.bin tfm/bin/tfm_s.hex tfm/bin/tfm_ns.bin tfm/bin/tfm_ns.hex tfm/bin/tfm_s_signed.bin tfm/bin/tfm_ns_signed.bin tfm/bin/tfm_s_ns_signed.bin cmd.exe /C "cd /D C:\Nordic	fm\mycli\build	fm && E:\Programs\Nordic	oolchains\v2.0.0\opt\bin\cmake.exe --build . -j 1" ninja: build stopped: subcommand failed. FATAL ERROR: command exited with status 1: 'e:\Programs\Nordic	oolchains\v2.0.0\opt\bin\cmake.EXE' --build 'c:\Nordic	fm\mycli\build'

Simon · Accepted Answer

I was able to resolve the issue by setting CONFIG_PM_PARTITION_SIZE_TFM =0x4C000 in mycli/prj.conf 
 
 Explanation 
 As you can see in the output below, tfm is overflowed by 49152 bytes 
 ../arm-zephyr-eabi/bin/ld.exe: region `FLASH' overflowed by 49152 bytes
Memory region Used Size Region Size %age Used
 FLASH: 304 KB 256 KB 118.75%
 RAM: 45180 B 256 KB 17.23% 
 In the memory log output you showed earlier, I guess that was from the application and not tfm. 
 As you can see in the log above, the allocated room for tfm is 256 KB, which you can also see by running ninja partition_manager_report from the build folder: 
 siiv@siiv-7090 MINGW64 /c/nordic/ncs_samples_local/bls-hsm-2/mycli/build (main)
$ ninja partition_manager_report
[1/1] cmd.exe /C "cd /D C:
ordic
cs_samples_lo...ples_local/bls-hsm-2/mycli/build/partitions.yml" flash_primary (0x100000 - 1024kB):
+---------------------------------------------+
+---0x0: tfm_secure (0x40000 - 256kB)---------+
| 0x0: tfm (0x40000 - 256kB) |
+---0x40000: tfm_nonsecure (0xb8000 - 736kB)--+
| 0x40000: app (0xb8000 - 736kB) |
+---0xf8000: tfm_storage (0x8000 - 32kB)------+
| 0xf8000: tfm_its (0x2000 - 8kB) |
| 0xfa000: tfm_otp_nv_counters (0x2000 - 8kB) |
| 0xfc000: tfm_ps (0x4000 - 16kB) |
+---------------------------------------------+

 otp (0x2fc - 764B):
+------------------------------+
| 0xff8100: otp (0x2fc - 764B) |
+------------------------------+

 sram_primary (0x80000 - 512kB):
+------------------------------------------------+
+---0x20000000: sram_secure (0x40000 - 256kB)----+
| 0x20000000: tfm_sram (0x40000 - 256kB) |
+---0x20040000: sram_nonsecure (0x40000 - 256kB)-+
| 0x20040000: sram_primary (0x40000 - 256kB) |
+------------------------------------------------+ 
 In order to increase it to 304 KB=311296 bytes=0x4C000, I need to set CONFIG_PM_PARTITION_SIZE_TFM to 0x4C000 in mycli/prj.conf 
 This will increase the allocated place for tfm and make room for the imported library. 
 In some cases, if your application is very large, this may not be possible. Increasing the allocated space for tfm, will decrease the allocated space for the application, and the appliation may throw a FLASH overflow error. However, in your case, the application is only using about 12-13% of the allocated space. 
 
 Best regards, 
 Simon

Problem importing a library into TF-M: Not enough space to import i

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