llext example for esp32c3-devkitm #80585

HalfUnitato · 2024-10-29T20:53:55Z

HalfUnitato
Oct 29, 2024

Dear community,
I'm kinda new to zephyr and I want to load different llext-files during runtime on my esp32c3-devkitm board.

Thus I first wanted to start with the example provided at
https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/subsys/llext/modules

The only changes I made (except logging-setting) was adding

CONFIG_LLEXT_TYPE_ELF_RELOCATABLE=y
CONFIG_LLEXT_STORAGE_WRITABLE=y

to the prj.conf.

if I then compile the program via
west build -b esp32c3_devkitm
and flash it to the esp-board i get following (error-) output:

can you tell me / push me in the right direction on what is wrong and how to fix it?

Your help is much appreciated!

Detecting chip type... ESP32-C3
--- idf_monitor on /dev/ttyUSB0 115200 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
ESP-ROM:esp32c3-api1-20210207
Build:Feb  7 2021
rst:0x1 (POWERON),boot:0xc (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:2
load:0x3fc8ae30,len:0x1bec
load:0x40380000,len:0xae20
0x40380000: iram_vma at ??:?

SHA-256 comparison failed:
Calculated: 55e883ac40f9ba1eec77017bed87a55c107522260ad34cd1b30e023308be14b0
Expected: 00000000b0350000000000000000000000000000000000000000000000000000
Attempting to boot anyway...
entry 0x403816fa
0x403816fa: __start at development/zephyr/soc/espressif/common/loader.c:231

I (72) boot: ESP Simple boot
I (72) boot: compile time Oct 29 2024 17:55:16
I (72) spi_flash: detected chip: generic
I (72) spi_flash: flash io: dio
W (74) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (86) boot: chip revision: v0.3
I (89) boot.esp32c3: SPI Speed      : 40MHz
I (93) boot.esp32c3: SPI Mode       : DIO
I (97) boot.esp32c3: SPI Flash Size : 4MB
I (101) boot: Enabling RNG early entropy source...
I (105) boot: DRAM: lma 0x00000020 vma 0x3fc8ae30 len 0x1bec   (7148)
I (111) boot: IRAM: lma 0x00001c14 vma 0x40380000 len 0xae20   (44576)
0x40380000: iram_vma at ??:?

I (117) boot: padd: lma 0x0000ca48 vma 0x00000000 len 0x35b0   (13744)
I (124) boot: IMAP: lma 0x00010000 vma 0x42000000 len 0x583c   (22588)
I (130) boot: padd: lma 0x00015844 vma 0x00000000 len 0xa7b4   (42932)
0x42000000: _OffsetAbsSyms at development/zephyr/arch/riscv/core/offsets/offsets.c:144

I (136) boot: DMAP: lma 0x00020000 vma 0x3c010000 len 0x3674   (13940)
I (142) boot: Image with 6 segments
I (146) boot: DROM segment: paddr=00020000h, vaddr=3c010000h, size=03680h ( 13952) map
I (153) boot: IROM segment: paddr=00010000h, vaddr=42000000h, size=0583Ah ( 22586) map
I (197) heap_runtime: ESP heap runtime init at 0x3fc9f880 size 177 kB.
*** Booting Zephyr OS build (tainted) v4.0.0-rc1-23-ge1389fa2cff6 ***
[00:00:00.026,000] <inf> app: Calling hello world as a module
[00:00:00.033,000] <dbg> llext: do_llext_load: Loading ELF data...
[00:00:00.039,000] <dbg> llext: llext_load_elf_data: Loading relocatable ELF
[00:00:00.046,000] <dbg> llext: do_llext_load: Finding ELF tables...
[00:00:00.053,000] <dbg> llext: llext_find_tables: section 0 at 0x0: name 0, type 0, flags 0x0, addr 0x0, size 0, link 0, info 0
[00:00:00.065,000] <dbg> llext: llext_find_tables: section 1 at 0x34: name 32, type 1, flags 0x6, addr 0x0, size 34, link 0, info 0
[00:00:00.077,000] <dbg> llext: llext_find_tables: section 2 at 0x20c: name 27, type 4, flags 0x40, addr 0x0, size 36, link 10, info 1
[00:00:00.090,000] <dbg> llext: llext_find_tables: section 3 at 0x58: name 38, type 1, flags 0x2, addr 0x0, size 44, link 0, info 0
[00:00:00.102,000] <dbg> llext: llext_find_tables: section 4 at 0x84: name 51, type 1, flags 0x2, addr 0x0, size 8, link 0, info 0
[00:00:00.114,000] <dbg> llext: llext_find_tables: section 5 at 0x230: name 46, type 4, flags 0x40, addr 0x0, size 24, link 10, info 4
[00:00:00.127,000] <dbg> llext: llext_find_tables: section 6 at 0x8c: name 65, type 1, flags 0x3, addr 0x0, size 0, link 0, info 0
[00:00:00.139,000] <dbg> llext: llext_find_tables: section 7 at 0x8c: name 71, type 8, flags 0x3, addr 0x0, size 0, link 0, info 0
[00:00:00.151,000] <dbg> llext: llext_find_tables: section 8 at 0x8c: name 76, type 1, flags 0x30, addr 0x0, size 33, link 0, info 0
[00:00:00.163,000] <dbg> llext: llext_find_tables: section 9 at 0xad: name 85, type 1879048195, flags 0x0, addr 0x0, size 47, link 0, info 0
[00:00:00.176,000] <dbg> llext: llext_find_tables: section 10 at 0xdc: name 1, type 2, flags 0x0, addr 0x0, size 240, link 11, info 13
[00:00:00.189,000] <dbg> llext: llext_find_tables: symtab at 10
[00:00:00.195,000] <dbg> llext: llext_find_tables: section 11 at 0x1cc: name 9, type 3, flags 0x0, addr 0x0, size 63, link 0, info 0
[00:00:00.208,000] <dbg> llext: llext_find_tables: strtab at 11
[00:00:00.214,000] <dbg> llext: llext_find_tables: section 12 at 0x248: name 17, type 3, flags 0x0, addr 0x0, size 103, link 0, info 0
[00:00:00.226,000] <dbg> llext: llext_find_tables: shstrtab at 12
[00:00:00.233,000] <dbg> llext: do_llext_load: Allocate and copy strings...
[00:00:00.240,000] <dbg> llext: llext_init_mem_part: region 7: start 0x3fc8b078, size 103
[00:00:00.249,000] <dbg> llext: llext_init_mem_part: region 6: start 0x3fc8affc, size 63
[00:00:00.257,000] <dbg> llext: do_llext_load: Mapping ELF sections...
[00:00:00.264,000] <dbg> llext: llext_map_sections: section 0 name  skipped
[00:00:00.272,000] <dbg> llext: llext_map_sections: section 1 name .text maps to region 0
[00:00:00.280,000] <dbg> llext: llext_map_sections: section 2 name .rela.text skipped
[00:00:00.289,000] <dbg> llext: llext_map_sections: section 3 name .rodata maps to region 2
[00:00:00.297,000] <dbg> llext: llext_map_sections: section 4 name .exported_sym maps to region 4
[00:00:00.307,000] <dbg> llext: llext_map_sections: section 5 name .rela.exported_sym skipped
[00:00:00.316,000] <dbg> llext: llext_map_sections: section 6 name .data skipped
[00:00:00.323,000] <dbg> llext: llext_map_sections: section 7 name .bss skipped
[00:00:00.331,000] <dbg> llext: llext_map_sections: section 8 name .comment skipped
[00:00:00.339,000] <dbg> llext: llext_map_sections: section 9 name .riscv.attributes skipped
[00:00:00.348,000] <dbg> llext: llext_map_sections: section 10 name .symtab already mapped to region 5
[00:00:00.358,000] <dbg> llext: llext_map_sections: section 11 name .strtab already mapped to region 6
[00:00:00.368,000] <dbg> llext: llext_map_sections: section 12 name .shstrtab already mapped to region 7
[00:00:00.377,000] <dbg> llext: do_llext_load: Allocate and copy regions...
[00:00:00.385,000] <dbg> llext: llext_init_mem_part: region 0: start 0x3fc8ae64, size 34
[00:00:00.393,000] <dbg> llext: llext_init_mem_part: region 2: start 0x3fc8ae88, size 44
[00:00:00.402,000] <dbg> llext: llext_init_mem_part: region 4: start 0x3fc8aeb4, size 8
[00:00:00.410,000] <dbg> llext: llext_init_mem_part: region 5: start 0x3fc8af0c, size 240
[00:00:00.419,000] <dbg> llext: do_llext_load: Counting exported symbols...
[00:00:00.426,000] <dbg> llext: llext_count_export_syms: symbol count 15
[00:00:00.433,000] <dbg> llext: llext_count_export_syms: unhandled symbol 1, name , type tag 3, bind 0, sect 1
[00:00:00.444,000] <dbg> llext: llext_count_export_syms: unhandled symbol 2, name , type tag 3, bind 0, sect 3
[00:00:00.454,000] <dbg> llext: llext_count_export_syms: unhandled symbol 3, name , type tag 3, bind 0, sect 4
[00:00:00.465,000] <dbg> llext: llext_count_export_syms: unhandled symbol 4, name , type tag 3, bind 0, sect 6
[00:00:00.475,000] <dbg> llext: llext_count_export_syms: unhandled symbol 5, name , type tag 3, bind 0, sect 7
[00:00:00.485,000] <dbg> llext: llext_count_export_syms: unhandled symbol 6, name , type tag 3, bind 0, sect 8
[00:00:00.496,000] <dbg> llext: llext_count_export_syms: unhandled symbol 7, name , type tag 3, bind 0, sect 9
[00:00:00.506,000] <dbg> llext: llext_count_export_syms: unhandled symbol 8, name hello_world_ext.c, type tag 4, bind 0, sect 65521
[00:00:00.518,000] <dbg> llext: llext_count_export_syms: unhandled symbol 9, name $x, type tag 0, bind 0, sect 1
[00:00:00.529,000] <dbg> llext: llext_count_export_syms: unhandled symbol 10, name __llext_sym_hello_world, type tag 1, bind 0, sect 4
[00:00:00.542,000] <dbg> llext: llext_count_export_syms: unhandled symbol 11, name .LC0, type tag 0, bind 0, sect 3
[00:00:00.552,000] <dbg> llext: llext_count_export_syms: unhandled symbol 12, name .LC1, type tag 0, bind 0, sect 3
[00:00:00.563,000] <dbg> llext: llext_count_export_syms: unhandled symbol 13, name printk, type tag 0, bind 1, sect 0
[00:00:00.574,000] <dbg> llext: llext_count_export_syms: function symbol 14, name hello_world, type tag 2, bind 1, sect 1
[00:00:00.586,000] <dbg> llext: do_llext_load: Allocating memory for symbol table...
[00:00:00.594,000] <dbg> llext: do_llext_load: Copying symbols...
[00:00:00.600,000] <dbg> llext: llext_copy_symbols: function symbol 0 name hello_world addr 0x3fc8ae64
[00:00:00.610,000] <dbg> llext: do_llext_load: Linking ELF...
[00:00:00.616,000] <dbg> llext: llext_link: relocation section .rela.text (2) acting on section 1 has 3 relocations
[00:00:00.627,000] <dbg> llext: llext_link: relocation 2:0 info 0xb1a (type 26, sym 11) offset 8 sym_name .LC0 sym_type 0 sym_bind 0 sym_ndx 3
[00:00:00.640,000] <inf> llext: writing relocation symbol .LC0 type 26 sym 11 at addr 0x3fc8ae6c addr 0x3fc8ae88
[00:00:00.651,000] <dbg> elf: arch_elf_relocate: Relocating symbol .LC0 at 0x3fc8ae6c with base address 0x3fc8ae88 load address 0x3fc8ae64 type 26
[00:00:00.664,000] <dbg> llext: llext_link: relocation 2:1 info 0xb1b (type 27, sym 11) offset 12 sym_name .LC0 sym_type 0 sym_bind 0 sym_ndx 3
[00:00:00.678,000] <inf> llext: writing relocation symbol .LC0 type 27 sym 11 at addr 0x3fc8ae70 addr 0x3fc8ae88
[00:00:00.688,000] <dbg> elf: arch_elf_relocate: Relocating symbol .LC0 at 0x3fc8ae70 with base address 0x3fc8ae88 load address 0x3fc8ae64 type 27
[00:00:00.702,000] <dbg> llext: llext_link: relocation 2:2 info 0xd12 (type 18, sym 13) offset 16 sym_name printk sym_type 0 sym_bind 1 sym_ndx 0
[00:00:00.715,000] <inf> llext: found symbol printk at 0x403854d0
0x403854d0: printk at development/zephyr/lib/os/printk.c:193

[00:00:00.722,000] <inf> llext: writing relocation symbol printk type 18 sym 13 at addr 0x3fc8ae74 addr 0x403854d0
0x403854d0: printk at development/zephyr/lib/os/printk.c:193

[00:00:00.733,000] <dbg> elf: arch_elf_relocate: Relocating symbol printk at 0x3fc8ae74 with base address 0x403854d0 load address 0x3fc8ae64 type 18
0x403854d0: printk at development/zephyr/lib/os/printk.c:193

[00:00:00.746,000] <dbg> llext: llext_link: relocation section .rela.exported_sym (5) acting on section 4 has 2 relocations
[00:00:00.758,000] <dbg> llext: llext_link: relocation 5:0 info 0xc01 (type 1, sym 12) offset 0 sym_name .LC1 sym_type 0 sym_bind 0 sym_ndx 3
[00:00:00.771,000] <inf> llext: writing relocation symbol .LC1 type 1 sym 12 at addr 0x3fc8aeb4 addr 0x3fc8aea8
[00:00:00.781,000] <dbg> elf: arch_elf_relocate: Relocating symbol .LC1 at 0x3fc8aeb4 with base address 0x3fc8aea8 load address 0x3fc8ae64 type 1
[00:00:00.795,000] <dbg> llext: llext_link: relocation 5:1 info 0xe01 (type 1, sym 14) offset 4 sym_name hello_world sym_type 2 sym_bind 1 sym_ndx 1
[00:00:00.809,000] <inf> llext: writing relocation symbol hello_world type 1 sym 14 at addr 0x3fc8aeb8 addr 0x3fc8ae64
[00:00:00.820,000] <dbg> elf: arch_elf_relocate: Relocating symbol hello_world at 0x3fc8aeb8 with base address 0x3fc8ae64 load address 0x3fc8ae64 type 1
[00:00:00.834,000] <dbg> llext: llext_export_symbols: sym 0x3fc8ae64 name hello_world in 0x3fc8e1a4
[00:00:00.843,000] <dbg> llext: do_llext_load: loaded module, .text at 0x3fc8ae64, .rodata at 0x3fc8ae88
[00:00:00.853,000] <inf> llext: Loaded extension ext
[00:00:00.879,000] <err> os:
[00:00:00.882,000] <err> os:  mcause: 1, Instruction Access fault
[00:00:00.889,000] <err> os:   mtval: 3fc8ae64
[00:00:00.894,000] <err> os:      a0: 40385d9c    t0: 00000009
[00:00:00.900,000] <err> os:      a1: 3fc9f3a4    t1: 00000008
[00:00:00.907,000] <err> os:      a2: 00000000    t2: 00000020
[00:00:00.913,000] <err> os:      a3: 3fc8b4a8    t3: 00000010
[00:00:00.920,000] <err> os:      a4: 60000000    t4: 00000005
[00:00:00.926,000] <err> os:      a5: 3fc9f6bc    t5: 0000007f
[00:00:00.933,000] <err> os:      a6: 00000000    t6: 00000010
[00:00:00.939,000] <err> os:      a7: 00000027
[00:00:00.945,000] <err> os:      sp: 3fc8d980
[00:00:00.950,000] <err> os:      ra: 420001e4
[00:00:00.955,000] <err> os:    mepc: 3fc8ae64
[00:00:00.960,000] <err> os: mstatus: 00001880
[00:00:00.965,000] <err> os:
[00:00:00.969,000] <err> os: call trace:
[00:00:00.973,000] <err> os:       0: sp: 3fc8d99c ra: 42004156
[00:00:00.980,000] <err> os:       1: sp: 3fc8d9a0 ra: 42004194
[00:00:00.986,000] <err> os:       2: sp: 3fc8d9a4 ra: 420041a6
[00:00:00.993,000] <err> os:       3: sp: 3fc8dbf0 ra: 42001284
[00:00:01.000,000] <err> os:
[00:00:01.003,000] <err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:01.011,000] <err> os: Current thread: 0x3fc9f4a8 (unknown)
[00:00:01.018,000] <err> os: Halting system

ddemelier-ts · 2024-11-29T15:59:23Z

ddemelier-ts
Nov 29, 2024

I've been able to load an ELF by disabling the option BOOTLOADER_REGION_PROTECTION_ENABLE. the mcause registers indicates a PMP (physical memory protection) error which lead me to there. It worked for me (on a C6 though but it should work on C3).

3 replies

HalfUnitato Dec 3, 2024
Author

Thanks for your suggestion.
I solved the issue by loading the llext-file into iram.

XiP usage:
Do you know how to make it possible to load llext directly from flash (XiP) on the esp32 (passing the flash-adr to Loader)?
Doing this I get the "mcause 5, Load access fault".
I set 'config_xip'. But not sure what else is needed. And tried labeling my dts-partition as 'app'

Thanks in advance!

ddemelier-ts Dec 9, 2024

CONFIG_XIP will always be required as long as the bootloader lives in the ROM, it is not related to the llext. I don't know what causes your access fault.

HalfUnitato Dec 9, 2024
Author

Yes, this is no llext issue, I agree.

looks more like a esp-security feature where the workaround is little bit confusing to me.
I'll digging deeper if I find some time.

still thank you!

ghost · 2024-12-27T15:22:20Z

ghost
Dec 27, 2024

Having the same issue, and the mentioned workarounds here are not working:

$ west build -b esp_wrover_kit/esp32/procpu -T sample.llext.modules.module_build .
WARNING: "west build" does not support conditional config "arch:arm:CONFIG_ARM_MPU=n". Add "-DCONFIG_ARM_MPU=n" to the supplied CMake arguments if desired.
WARNING: "west build" does not support conditional config "arch:arm:CONFIG_ARM_AARCH32_MMU=n". Add "-DCONFIG_ARM_AARCH32_MMU=n" to the supplied CMake arguments if desired.
...
Successfully created esp32 image.
$ west flash
...
-- west flash: using runner esp32
...
Wrote 147456 bytes at 0x00001000 in 1.9 seconds (605.3 kbit/s)...
...
$ west espressif monitor
...
ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3ffb0000,len:9424
load:0x40080000,len:41840
0x40080000: _WindowOverflow4 at /home/speter/Documents/projects/zephyr-envs/zephyrshd/zephyr/arch/xtensa/core/window_vectors.S:56

entry 0x40085968
0x40085968: __start at /home/speter/Documents/projects/zephyr-envs/zephyrshd/zephyr/soc/espressif/common/loader.c:247

I (35) soc_init: ESP Simple boot
I (35) soc_init: compile time Dec 27 2024 14:35:37
W (35) soc_init: Unicore bootloader
I (35) spi_flash: detected chip: generic
I (39) spi_flash: flash io: dio
I (42) soc_init: chip revision: v3.1
I (45) flash_init: SPI Speed      : 40MHz
I (49) flash_init: SPI Mode       : DIO
I (52) flash_init: SPI Flash Size : 4MB
I (56) boot: DRAM: lma 0x00001020 vma 0x3ffb0000 len 0x24d0   (9424)
I (62) boot: IRAM: lma 0x000034f8 vma 0x40080000 len 0xa370   (41840)
0x40080000: _WindowOverflow4 at /home/speter/Documents/projects/zephyr-envs/zephyrshd/zephyr/arch/xtensa/core/window_vectors.S:56

I (68) boot: padd: lma 0x0000d878 vma 0x00000000 len 0x2780   (10112)
I (74) boot: IMAP: lma 0x00010000 vma 0x400d0000 len 0x543c   (21564)
0x400d0000: _image_irom_vaddr at ??:?

I (81) boot: padd: lma 0x00015444 vma 0x00000000 len 0xabb4   (43956)
I (87) boot: DMAP: lma 0x00020000 vma 0x3f400000 len 0x30d0   (12496)
I (93) boot: Image with 6 segments
I (96) boot: DROM segment: paddr=00020000h, vaddr=3f400000h, size=030D0h ( 12496) map
I (104) boot: IROM segment: paddr=00010000h, vaddr=400d0000h, size=0543Ch ( 21564) map
I (122) boot: Jumping to the main image...
I (150) heap_runtime: ESP heap runtime init at 0x3ffc5498 size 106 kB.
*** Booting Zephyr OS build v4.0.0-2760-g5a8671e7edb6 ***
[00:00:00.150,000] <inf> app: Calling hello world as a module
[00:00:00.157,000] <dbg> llext: do_llext_load: Loading ELF data...
[00:00:00.163,000] <dbg> llext: llext_load_elf_data: Loading relocatable ELF
[00:00:00.170,000] <dbg> llext: do_llext_load: Finding ELF tables...
[00:00:00.177,000] <dbg> llext: llext_find_tables: section 0 at 0x0: name 0, type 0, flags 0x0, addr 0x0, size 0, link 0, info 0
[00:00:00.189,000] <dbg> llext: llext_find_tables: section 1 at 0x34: name 32, type 1, flags 0x6, addr 0x0, size 28, link 0, info 0
[00:00:00.201,000] <dbg> llext: llext_find_tables: section 2 at 0x1d4: name 27, type 4, flags 0x40, addr 0x0, size 60, link 10, info 1
[00:00:00.214,000] <dbg> llext: llext_find_tables: section 3 at 0x50: name 38, type 1, flags 0x2, addr 0x0, size 44, link 0, info 0
[00:00:00.226,000] <dbg> llext: llext_find_tables: section 4 at 0x7c: name 51, type 1, flags 0x2, addr 0x0, size 8, link 0, info 0
[00:00:00.238,000] <dbg> llext: llext_find_tables: section 5 at 0x210: name 46, type 4, flags 0x40, addr 0x0, size 24, link 10, info 4
[00:00:00.251,000] <dbg> llext: llext_find_tables: section 6 at 0x84: name 65, type 1, flags 0x3, addr 0x0, size 0, link 0, info 0
[00:00:00.263,000] <dbg> llext: llext_find_tables: section 7 at 0x84: name 71, type 8, flags 0x3, addr 0x0, size 0, link 0, info 0
[00:00:00.275,000] <dbg> llext: llext_find_tables: section 8 at 0x84: name 76, type 1, flags 0x30, addr 0x0, size 33, link 0, info 0
[00:00:00.287,000] <dbg> llext: llext_find_tables: section 9 at 0xa5: name 85, type 7, flags 0x0, addr 0x0, size 56, link 0, info 0
[00:00:00.300,000] <dbg> llext: llext_find_tables: section 10 at 0xe0: name 1, type 2, flags 0x0, addr 0x0, size 192, link 11, info 10
[00:00:00.312,000] <dbg> llext: llext_find_tables: symtab at 10
[00:00:00.319,000] <dbg> llext: llext_find_tables: section 11 at 0x1a0: name 9, type 3, flags 0x0, addr 0x0, size 50, link 0, info 0
[00:00:00.331,000] <dbg> llext: llext_find_tables: strtab at 11
[00:00:00.337,000] <dbg> llext: llext_find_tables: section 12 at 0x228: name 17, type 3, flags 0x0, addr 0x0, size 98, link 0, info 0
[00:00:00.350,000] <dbg> llext: llext_find_tables: shstrtab at 12
[00:00:00.356,000] <dbg> llext: do_llext_load: Allocate and copy strings...
[00:00:00.364,000] <dbg> llext: llext_init_mem_part: region 7: start 0x3ffb02b8, size 98
[00:00:00.372,000] <dbg> llext: llext_init_mem_part: region 6: start 0x3ffb0230, size 50
[00:00:00.381,000] <dbg> llext: do_llext_load: Mapping ELF sections...
[00:00:00.388,000] <dbg> llext: llext_map_sections: section 0 name  skipped
[00:00:00.395,000] <dbg> llext: llext_map_sections: section 1 name .text maps to region 0
[00:00:00.403,000] <dbg> llext: llext_map_sections: section 2 name .rela.text skipped
[00:00:00.412,000] <dbg> llext: llext_map_sections: section 3 name .rodata maps to region 2
[00:00:00.420,000] <dbg> llext: llext_map_sections: section 4 name .exported_sym maps to region 4
[00:00:00.430,000] <dbg> llext: llext_map_sections: section 5 name .rela.exported_sym skipped
[00:00:00.439,000] <dbg> llext: llext_map_sections: section 6 name .data skipped
[00:00:00.446,000] <dbg> llext: llext_map_sections: section 7 name .bss skipped
[00:00:00.454,000] <dbg> llext: llext_map_sections: section 8 name .comment skipped
[00:00:00.462,000] <dbg> llext: llext_map_sections: section 9 name .xtensa.info skipped
[00:00:00.471,000] <dbg> llext: llext_map_sections: section 10 name .symtab already mapped to region 5
[00:00:00.480,000] <dbg> llext: llext_map_sections: section 11 name .strtab already mapped to region 6
[00:00:00.490,000] <dbg> llext: llext_map_sections: section 12 name .shstrtab already mapped to region 7
[00:00:00.500,000] <dbg> llext: do_llext_load: Allocate and copy regions...
[00:00:00.507,000] <dbg> llext: llext_init_mem_part: region 0: start 0x3ffb00c4, size 28
[00:00:00.516,000] <dbg> llext: llext_init_mem_part: region 2: start 0x3ffb00e0, size 44
[00:00:00.524,000] <dbg> llext: llext_init_mem_part: region 4: start 0x3ffb010c, size 8
[00:00:00.533,000] <dbg> llext: llext_init_mem_part: region 5: start 0x3ffb0170, size 192
[00:00:00.541,000] <dbg> llext: do_llext_load: Counting exported symbols...
[00:00:00.549,000] <dbg> llext: llext_count_export_syms: symbol count 12
[00:00:00.556,000] <dbg> llext: llext_count_export_syms: unhandled symbol 1, name , type tag 3, bind 0, sect 1
[00:00:00.566,000] <dbg> llext: llext_count_export_syms: unhandled symbol 2, name , type tag 3, bind 0, sect 3
[00:00:00.577,000] <dbg> llext: llext_count_export_syms: unhandled symbol 3, name , type tag 3, bind 0, sect 4
[00:00:00.587,000] <dbg> llext: llext_count_export_syms: unhandled symbol 4, name , type tag 3, bind 0, sect 6
[00:00:00.598,000] <dbg> llext: llext_count_export_syms: unhandled symbol 5, name , type tag 3, bind 0, sect 7
[00:00:00.608,000] <dbg> llext: llext_count_export_syms: unhandled symbol 6, name , type tag 3, bind 0, sect 8
[00:00:00.618,000] <dbg> llext: llext_count_export_syms: unhandled symbol 7, name , type tag 3, bind 0, sect 9
[00:00:00.629,000] <dbg> llext: llext_count_export_syms: unhandled symbol 8, name hello_world_ext.c, type tag 4, bind 0, sect 65521
[00:00:00.641,000] <dbg> llext: llext_count_export_syms: unhandled symbol 9, name __llext_sym_hello_world, type tag 1, bind 0, sect 4
[00:00:00.654,000] <dbg> llext: llext_count_export_syms: unhandled symbol 10, name printk, type tag 0, bind 1, sect 0
[00:00:00.665,000] <dbg> llext: llext_count_export_syms: function symbol 11, name hello_world, type tag 2, bind 1, sect 1
[00:00:00.676,000] <dbg> llext: do_llext_load: Allocating memory for symbol table...
[00:00:00.684,000] <dbg> llext: do_llext_load: Copying symbols...
[00:00:00.691,000] <dbg> llext: llext_copy_symbols: function symbol 0 name hello_world addr 0x3ffb00cc
[00:00:00.700,000] <dbg> llext: do_llext_load: Linking ELF...
[00:00:00.707,000] <dbg> llext: llext_link_plt: Found 0x3ffb02d3 in PLT 4 size 12 cnt 5 text 0x3ffb00c4
[00:00:00.716,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0x3ffb00e0 type 1 at 0x3ffb00c4
[00:00:00.726,000] <dbg> llext: llext_link_plt: symbol  relocation @0x3ffb00c4 r-offset 0 .text offset 0x34 stb 0
[00:00:00.737,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0x40084c60 type 1 at 0x3ffb00c8
[00:00:00.747,000] <dbg> llext: llext_link_plt: symbol printk relocation @0x3ffb00c8 r-offset 0x4 .text offset 0x34 stb 1
0x40084c60: printk at /home/speter/Documents/projects/zephyr-envs/zephyrshd/zephyr/lib/os/printk.c:193

[00:00:00.758,000] <dbg> llext: xtensa_elf_relocate: 0x3ffb00d1: unhandled OPC or no relocation fffc21 inf 0x114 offs 0xd
[00:00:00.770,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0xfffc2101 type 20 at 0x3ffb00d1
[00:00:00.780,000] <dbg> llext: llext_link_plt: symbol  relocation @0x3ffb00d1 r-offset 0xd .text offset 0x34 stb 0
[00:00:00.791,000] <dbg> llext: xtensa_elf_relocate: 0x3ffb00d6: unhandled OPC or no relocation fffc81 inf 0x114 offs 0x12
[00:00:00.802,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0xfc8102ad type 20 at 0x3ffb00d6
[00:00:00.812,000] <dbg> llext: llext_link_plt: symbol  relocation @0x3ffb00d6 r-offset 0x12 .text offset 0x34 stb 0
[00:00:00.823,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0xfc8102ad type 11 at 0x3ffb00d6
[00:00:00.834,000] <dbg> llext: llext_link_plt: symbol printk relocation @0x3ffb00d6 r-offset 0x12 .text offset 0x34 stb 1
[00:00:00.845,000] <dbg> llext: llext_link_plt: Found 0x3ffb02e6 in PLT 4 size 12 cnt 2 text 0x3ffb00c4
[00:00:00.855,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0x3ffb0100 type 1 at 0x3ffb010c
[00:00:00.865,000] <dbg> llext: llext_link_plt: symbol  relocation @0x3ffb010c r-offset 0 .text offset 0x34 stb 0
[00:00:00.876,000] <dbg> llext: xtensa_elf_relocate: Applied relocation to 0x3ffb00cc type 1 at 0x3ffb0110
[00:00:00.886,000] <dbg> llext: llext_link_plt: symbol hello_world relocation @0x3ffb0110 r-offset 0x4 .text offset 0x34 stb 1
[00:00:00.897,000] <dbg> llext: llext_export_symbols: sym 0x3ffb00cc name hello_world in 0x3ffb52dc
[00:00:00.907,000] <dbg> llext: do_llext_load: loaded module, .text at 0x3ffb00c4, .rodata at 0x3ffb00e0
[00:00:00.917,000] <inf> llext: Loaded extension ext
[00:00:00.922,000] <err> os:  ** FATAL EXCEPTION
[00:00:00.927,000] <err> os:  ** CPU 0 EXCCAUSE 2 (instr fetch error)
[00:00:00.935,000] <err> os:  **  PC 0x3ffb00cc VADDR 0x3ffb00cc
[00:00:00.941,000] <err> os:  **  PS 0x60d20
[00:00:00.946,000] <err> os:  **    (INTLEVEL:0 EXCM: 0 UM:1 RING:0 WOE:1 OWB:13 CALLINC:2)
[00:00:00.955,000] <err> os:  **  A0 0x80082af1  SP 0x3ffb4ac0  A2 0  A3 0x84
[00:00:00.963,000] <err> os:  **  A4 0x3ffb2450  A5 0x210  A6 0x3ffb44f8  A7 0
[00:00:00.971,000] <err> os:  **  A8 0x800d0564  A9 0x3ffb4aa0 A10 0x3ffb00cc A11 0x3f400a06
[00:00:00.980,000] <err> os:  ** A12 0 A13 0x3ffb52dc A14 0x1 A15 0x21
[00:00:00.987,000] <err> os:  ** LBEG 0x400012c5 LEND 0x400012d5 LCOUNT 0xfffffff3
[00:00:00.996,000] <err> os:  ** SAR 0x4
[00:00:01.000,000] <err> os:  **  THREADPTR 0


Backtrace:0x3ffb00c9:0x3ffb4ac0  |<-CORRUPTED

[00:00:01.010,000] <err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:01.018,000] <err> os: Current thread: 0x3ffb3538 (unknown)
[00:00:01.025,000] <err> os: Halting system

1 reply

jacksparrowputhussery Jun 5, 2025

Hi,
I am new to zephyr rtos
getting the same error when trying to flash the sample llext module
how can I fix this

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

llext example for esp32c3-devkitm #80585

Uh oh!

{{title}}

Uh oh!

Replies: 2 comments 4 replies

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{title}}

Uh oh!

Select a reply

Uh oh!

llext example for esp32c3-devkitm #80585

Uh oh!

HalfUnitato Oct 29, 2024

Replies: 2 comments · 4 replies

Uh oh!

ddemelier-ts Nov 29, 2024

Uh oh!

HalfUnitato Dec 3, 2024 Author

Uh oh!

ddemelier-ts Dec 9, 2024

Uh oh!

HalfUnitato Dec 9, 2024 Author

Uh oh!

ghost Dec 27, 2024

Uh oh!

jacksparrowputhussery Jun 5, 2025

HalfUnitato
Oct 29, 2024

Replies: 2 comments 4 replies

ddemelier-ts
Nov 29, 2024

HalfUnitato Dec 3, 2024
Author

HalfUnitato Dec 9, 2024
Author

ghost
Dec 27, 2024