Linker script for an nrf52 S132 Bootloader - linker

Question

I'm currently building a bootloader suitable for Dual Channel DFU and SD132. It is on nrf52832, currently on PCA10040. Although the linker script works, and creates a hex file, I am left with an app_error_code 1 after nrf_sdh_enable_request(), from sd_softdevice_enable().
Is it the LS's fault? Have I completely missed the mark? Or is it something completely different. Feel free to ask for more details, I've included the LS, as I'm unsure of what else to add.
Thanks
Below is what I have so far, cobbled together from the various examples in the SDK.
SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)
GROUP(S132_softdevice.o)
MEMORY
{
FLASH_SOFTDEVICE (rx) : ORIGIN = 0x00001000, LENGTH = 0x00023000
FLASH (rx) : ORIGIN = 0x24000, LENGTH = 0x6CA00
SRAM_SOFTDEVICE (rwx) : ORIGIN = 0x20000000, LENGTH = 0x0005C10
RAM (rwx) : ORIGIN = 0x20005C11, LENGTH = 0x9D6F
/** Location of non initialized RAM. Non initialized RAM is used for exchanging bond information
* from application to bootloader when using buttonluss DFU OTA.
*/
NOINIT (rw) : ORIGIN = 0x2000F97F, LENGTH = 0x80
/** Location of bootloader setting in flash. */
BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0007F000, LENGTH = 0x1000
/** Location in UICR where bootloader start address is stored. */
UICR_BOOTLOADER (r) : ORIGIN = 0x10001014, LENGTH = 0x04
/** Location of mbr params page in flash. */
MBR_PARAMS_PAGE (rw) : ORIGIN = 0x0007E000, LENGTH = 0x1000
/** Location in UICR where mbr params page address is stored. */
UICR_MBR_PARAM_PAGE(r) : ORIGIN = 0x10001018, LENGTH = 0x04
}
SECTIONS
{
/* Place the bootloader settings page in flash. */
.bootloaderSettings(NOLOAD) :
{
} > BOOTLOADER_SETTINGS
/* Write the bootloader address in UICR. */
.uicrBootStartAddress :
{
KEEP(*(.uicrBootStartAddress))
} > UICR_BOOTLOADER
/* Place the mbr params page in flash. */
.mbrParamsPage(NOLOAD) :
{
} > MBR_PARAMS_PAGE
/* Write the bootloader address in UICR. */
.uicrMbrParamsPageAddress :
{
KEEP(*(.uicrMbrParamsPageAddress))
} > UICR_MBR_PARAM_PAGE
/* No init RAM section in bootloader. Used for bond information exchange. */
.noinit(NOLOAD) :
{
} > NOINIT
/* other placements follow here... */
}
SECTIONS
{
. = ALIGN(4);
.softdevice :
{
KEEP(*(.softdevice))
FILL(0xFFFFFFFF);
. = 0x00023000;
} > FLASH_SOFTDEVICE
. = ALIGN(4);
.softdevice_sram :
{
FILL(0xFFFFFFFF);
. = 0x00005C10;
} > SRAM_SOFTDEVICE
.svc_data :
{
PROVIDE(__start_svc_data = .);
KEEP(*(.svc_data))
PROVIDE(__stop_svc_data = .);
} > RAM
.fs_data :
{
PROVIDE(__start_fs_data = .);
KEEP(*(.fs_data))
PROVIDE(__stop_fs_data = .);
} > RAM
.log_dynamic_data :
{
PROVIDE(__start_log_dynamic_data = .);
KEEP(*(.log_dynamic_data))
PROVIDE(__stop_log_dynamic_data = .);
} > RAM
.cli_sorted_cmd_ptrs :
{
PROVIDE(__start_cli_sorted_cmd_ptrs = .);
KEEP(*(.cli_sorted_cmd_ptrs))
PROVIDE(__stop_cli_sorted_cmd_ptrs = .);
} > RAM
} INSERT AFTER .data;
SECTIONS
{
.dfu_trans :
{
PROVIDE(__start_dfu_trans = .);
KEEP(*(SORT(.dfu_trans*)))
PROVIDE(__stop_dfu_trans = .);
} > FLASH
.pwr_mgmt_data :
{
PROVIDE(__start_pwr_mgmt_data = .);
KEEP(*(SORT(.pwr_mgmt_data*)))
PROVIDE(__stop_pwr_mgmt_data = .);
} > FLASH
.log_const_data :
{
PROVIDE(__start_log_const_data = .);
KEEP(*(.log_const_data))
PROVIDE(__stop_log_const_data = .);
} > FLASH
.cli_command :
{
PROVIDE(__start_cli_command = .);
KEEP(*(.cli_command))
PROVIDE(__stop_cli_command = .);
} > FLASH
. = ALIGN(4);
.sdh_stack_observers :
{
PROVIDE(__start_sdh_stack_observers = .);
KEEP(*(SORT(.sdh_stack_observers*)))
PROVIDE(__stop_sdh_stack_observers = .);
} > FLASH
. = ALIGN(4);
.sdh_req_observers :
{
PROVIDE(__start_sdh_req_observers = .);
KEEP(*(SORT(.sdh_req_observers*)))
PROVIDE(__stop_sdh_req_observers = .);
} > FLASH
. = ALIGN(4);
.sdh_state_observers :
{
PROVIDE(__start_sdh_state_observers = .);
KEEP(*(SORT(.sdh_state_observers*)))
PROVIDE(__stop_sdh_state_observers = .);
} > FLASH
/*.sdh_ant_observers :
*{
* PROVIDE(__start_sdh_ant_observers = .);
* KEEP(*(SORT(.sdh_ant_observers*)))
* PROVIDE(__stop_sdh_ant_observers = .);
*} > FLASH
*/
. = ALIGN(4);
.sdh_ble_observers :
{
PROVIDE(__start_sdh_ble_observers = .);
KEEP(*(SORT(.sdh_ble_observers*)))
PROVIDE(__stop_sdh_ble_observers = .);
} > FLASH
. = ALIGN(4);
.sdh_soc_observers :
{
PROVIDE(__start_sdh_soc_observers = .);
KEEP(*(SORT(.sdh_soc_observers*)))
PROVIDE(__stop_sdh_soc_observers = .);
} > FLASH
} INSERT AFTER .text
INCLUDE "nrf5x_common.ld"
PROVIDE(_sbss = __bss_start__);
PROVIDE(_ebss = __bss_end__);
PROVIDE(_sdata = __data_start__);
PROVIDE(_sidata = __etext);
PROVIDE(_estack = __StackTop);
PROVIDE(_edata =__data_end__);
PROVIDE(__isr_vector = __StackTop);