STMLINK Minimal Repro

Makefile

all: minimal.s
	arm-none-eabi-gcc -mcpu=cortex-m0plus -T ./STM32L010F4.ld -nostdlib  minimal.s -o minimal.elf
	arm-none-eabi-objcopy -O ihex minimal.elf minimal.hex
	st-flash --reset --format ihex write minimal.hex

minimal.s

.global vtable
.global reset_handler

.type vtable, %object
vtable:
  .word _estack
  .word reset_handler
.size vtable, .-vtable

.type reset_handler, %function
reset_handler:
  MOV r0, #1
  MOV r0, #2
  MOV r0, #3
  MOV r0, #4

  MOV r0, #5
  MOV r0, #6
  MOV r0, #7
  MOV r0, #8

  MOV r0, #9
  MOV r0, #10
  MOV r0, #11
  MOV r0, #12

  MOV r0, #13
  MOV r0, #14
  MOV r0, #15
  MOV r0, #16

  MOV r0, #17
  MOV r0, #18
  MOV r0, #19
  MOV r0, #20

  MOV r0, #21
  MOV r0, #22
  MOV r0, #23
  MOV r0, #24

  MOV r0, #25
  MOV r0, #26
  MOV r0, #27

  main_loop:
    @ UNCOMMENT THE LINE BELOW TO GET THE ERROR
    @ MOV r0, #28 
    @ UNCOMMENT THE LINE ABOVE TO GET THE ERROR

    B main_loop
.size reset_handler, .-reset_handler

output

$ make
arm-none-eabi-gcc -mcpu=cortex-m0plus -T ./STM32L010F4.ld -nostdlib  minimal.s -o minimal.elf
arm-none-eabi-objcopy -O ihex minimal.elf minimal.hex
st-flash --reset --format ihex write minimal.hex
st-flash 1.7.0
2023-05-30T01:18:43 INFO common.c: L011: 8 KiB SRAM, 16 KiB flash in at least 128 byte pages.
2023-05-30T01:18:43 INFO common.c: Attempting to write 66 (0x42) bytes to stm32 address: 134217728 (0x8000000)
2023-05-30T01:18:43 INFO common.c: Flash page at addr: 0x08000000 erased
2023-05-30T01:18:43 INFO common.c: Finished erasing 1 pages of 128 (0x80) bytes
2023-05-30T01:18:43 INFO common.c: Starting Flash write for L0
2023-05-30T01:18:43 INFO common.c: Starting Half page flash write for STM32L core id
2023-05-30T01:18:43 INFO flash_loader.c: Successfully loaded flash loader in sram
2023-05-30T01:18:43 INFO flash_loader.c: Clear DFSR
2023-05-30T01:18:43 ERROR flash_loader.c: Flash loader run error
2023-05-30T01:18:43 WARN flash_loader.c: Loader state: R2 0x0 R15 0x0
2023-05-30T01:18:43 WARN flash_loader.c: MCU state: DHCSR 0x1080009 DFSR 0x0 CFSR 0x0 HFSR 0x0
2023-05-30T01:18:43 WARN common.c: l1_stlink_flash_loader_run(0x8000000) failed! == -1
2023-05-30T01:18:43 WARN common.c: 
write_half_pages failed == -1

STM32L010F4.ld

_estack = ORIGIN(RAM) + LENGTH(RAM);

MEMORY
{
    FLASH ( rx )      : ORIGIN = 0x08000000, LENGTH = 16K
    RAM ( rxw )       : ORIGIN = 0x20000000, LENGTH = 2K
}