Hello, I'm new here. I searched a while in the forum with no luck about this issue.
I'm using an TM4C1233H6PMI device, with a very simple code. Based on SPMA044A application report (spma044a.pdf) I protected a section of the code (from 0x800 to 0x1800 where the .text section is placed) as execute-only. Working with CodeComposer v5.5.0.00077.
I can run all the code, but when the code makes a call to a strtok() it generates a busfault. This behaviour is seen only with strtok(); i've tried with strcmp(), strcpy() and some driverlib functions and they all function properly, i mean, they don't trigger a BusFault.
Looking into the disassembly code, there is an LDR call pointing to a protected memory area (I put a breakpoint before the FlashProtectSet() call in order to see the disassembly, that's why is visible in the image).
Going deeper, the FaulStat shows a BusFault precise fault, and the FaultAddress is shown in the image.
The disassembly at the Fault Address shows this:
As you can see, the LDR instruction points to $C$CON1.
Now the question is: how Can I fix this issue? I'm missing something here?
Here is the map section in which strtok() is placed, and the memory configuration (only useful data shown)
MEMORY CONFIGURATION
name origin length used unused attr fill
---------------------- -------- --------- -------- -------- ---- --------
FLASH 00000000 00000800 0000026c 00000594 R X
FLASH_EX 00000800 00001800 00000fa8 00000858 X
FLASH_2 00002000 0003e000 000007ba 0003d846 R X
SRAM 20000000 00008000 0000044e 00007bb2 RW X
SEGMENT ALLOCATION MAP
run origin load origin length init length attrs members
---------- ----------- ---------- ----------- ----- -------
00000000 00000000 0000026c 0000026c r--
00000000 00000000 0000026c 0000026c r-- .intvecs
00000800 00000800 00000fa8 00000fa8 r-x
00000800 00000800 00000fa8 00000fa8 r-x .text
00002000 00002000 000007c0 000007c0 r--
00002000 00002000 00000782 00000782 r-- .const
00002788 00002788 00000038 00000038 r-- .cinit
20000000 20000000 00000451 00000000 rw-
20000000 20000000 00000400 00000000 rw- .stack
20000400 20000400 00000035 00000000 rw- .bss
20000438 20000438 00000019 00000000 rw- .data
SECTION ALLOCATION MAP
output attributes/
section page origin length input sections
-------- ---- ---------- ---------- ----------------
00001540 00000048 rtsv7M4_T_le_v4SPD16_eabi.lib : boot.obj (.text)
00001588 00000044 : cpy_tbl.obj (.text)
000015cc 00000044 : exit.obj (.text)
00001610 00000040 : strtok.obj (.text)
Thanks in advance
