SVC and fault handling not passed to application

[tkorsdal]

First step of trying to integrate S132 to a small OS is failing completely.

When I use SVC the system ends up in hanging in hard fault.

The SoD handler ends up trying to read branch address from location 0xa891be2c - which causes the hardfault. (The hardfault handler itself has the same problem)

The SoD it not enabled - for now I have just moved the OS to 0x1f000/0x20002128.

Am I supposed to do any initialization for this?

The invalid memory location comes from the SVC handler reading @0x20000000 - why? I would have expected that passing handler is done to fixed vector table address at 0x1f000?

[tkorsdal]

The softdevice is version 3.0.0 (from SDK 12.1.0).

Here is my linker script - it has extra defines for being able to lock memory for a scheduled process:

    /*###ICF### Section handled by ICF editor, don't touch! ****/
/*-Editor annotation file-*/
/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_1.xml" */
/*-Specials-*/
define symbol __ICFEDIT_intvec_start__ = 0x0001f000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_IROM1_start__ = 0x0001f000;
define symbol __ICFEDIT_region_IROM1_end__   = 0x0007FFFF;
define symbol __ICFEDIT_region_IROM2_start__ = 0x0;
define symbol __ICFEDIT_region_IROM2_end__   = 0x0;
define symbol __ICFEDIT_region_EROM1_start__ = 0x0;
define symbol __ICFEDIT_region_EROM1_end__   = 0x0;
define symbol __ICFEDIT_region_EROM2_start__ = 0x0;
define symbol __ICFEDIT_region_EROM2_end__   = 0x0;
define symbol __ICFEDIT_region_EROM3_start__ = 0x0;
define symbol __ICFEDIT_region_EROM3_end__   = 0x0;
define symbol __ICFEDIT_region_IRAM1_start__ = 0x20002128;
define symbol __ICFEDIT_region_IRAM1_end__   = 0x2000FFFF;
define symbol __ICFEDIT_region_IRAM2_start__ = 0x0;
define symbol __ICFEDIT_region_IRAM2_end__   = 0x0;
define symbol __ICFEDIT_region_ERAM1_start__ = 0x0;
define symbol __ICFEDIT_region_ERAM1_end__   = 0x0;
define symbol __ICFEDIT_region_ERAM2_start__ = 0x0;
define symbol __ICFEDIT_region_ERAM2_end__   = 0x0;
define symbol __ICFEDIT_region_ERAM3_start__ = 0x0;
define symbol __ICFEDIT_region_ERAM3_end__   = 0x0;
/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__ = 0x800;
define symbol __ICFEDIT_size_heap__   = 0x200;
/**** End of ICF editor section. ###ICF###*/

define memory mem with size = 4G;
define region IROM_region   =   mem:[from __ICFEDIT_region_IROM1_start__ to __ICFEDIT_region_IROM1_end__]
                              | mem:[from __ICFEDIT_region_IROM2_start__ to __ICFEDIT_region_IROM2_end__];
define region EROM_region   =   mem:[from __ICFEDIT_region_EROM1_start__ to __ICFEDIT_region_EROM1_end__]
                              | mem:[from __ICFEDIT_region_EROM2_start__ to __ICFEDIT_region_EROM2_end__]
                              | mem:[from __ICFEDIT_region_EROM3_start__ to __ICFEDIT_region_EROM3_end__];
define region IRAM_region   =   mem:[from __ICFEDIT_region_IRAM1_start__ to __ICFEDIT_region_IRAM1_end__]
                              | mem:[from __ICFEDIT_region_IRAM2_start__ to __ICFEDIT_region_IRAM2_end__];
define region ERAM_region   =   mem:[from __ICFEDIT_region_ERAM1_start__ to __ICFEDIT_region_ERAM1_end__]
                              | mem:[from __ICFEDIT_region_ERAM2_start__ to __ICFEDIT_region_ERAM2_end__]
                              | mem:[from __ICFEDIT_region_ERAM3_start__ to __ICFEDIT_region_ERAM3_end__];


define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };

initialize by copy { readwrite };
do not initialize  { section .noinit };

// Code item definitions for memory protection
// ITEM: bsp_os
define block bsp_os_code with alignment = 0x2000, size = 0x2000 { 	section .bsp_os_code,
																section .bsp_os_rodata,
																section .bsp_utils_code,
																section .bsp_utils_rodata,
																object strlen.o,
																object ABImemset.o, 
																object ABImemcpy_unaligned.o,
																object strcpy_unaligned.o
															};															
															
define block bsp_os_data_upro with alignment = 0x200, size = 0x0200 { section .bsp_os_data, section .bsp_os_bss };
define block bsp_os_data_uprw with alignment = 0x400, size = 0x0400 { section .bsp_utils_data, section .bsp_utils_bss, section .bsp_uprw_data };

// ITEM: services_test
define block services_test_code with alignment = 0x0200, size = 0x0200 { section .services_test_code, section .services_test_rodata  };
define block services_test_data with alignment = 0x0100, size = 0x0100 { section .services_test_data, section .services_test_bss };
define block services_test2_code with alignment = 0x0100, size = 0x0100 { section .services_test2_code, section .services_test2_rodata  };
define block services_test2_data with alignment = 0x0100, size = 0x0100 { section .services_test2_data, section .services_test2_bss };

// ITEM: services_communication
define block services_communication_code with alignment = 0x0200, size = 0x0200 { section .services_communication_code, section .services_communication_rodata  };
define block services_communication_data with alignment = 0x0100, size = 0x0100 { section .services_communication_data, section .services_communication_bss };

place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };

place in IROM_region  { readonly,
						block bsp_os_code,
						block services_test_code, 
						block services_test2_code,
						block services_communication_code
						};
						
place in EROM_region  { readonly section application_specific_ro };
place in IRAM_region  { readwrite,
						block CSTACK,
						block HEAP,
						block bsp_os_data_upro,
						block bsp_os_data_uprw,
						block services_test_data,
						block services_test2_data,
						block services_communication_data
						};
						
place in ERAM_region  { readwrite section application_specific_rw };