Not running well with nRF52832 dev board

[daguhl]

Debugging happens well with JLink GDB server and command line arm-none-eabi-gdb. Without breakpoints the target runs normally.

With gnu-debugger plugin, even setting no breakpoint, the target starts but at some early init point stops with a SIGTRAP, and keeps stopping there if continuing execution.

Setup:

• Mac OSX 10.13.6
• Visual Studio Code v1.30.1
• Toolchain gcc-arm-none-eabi-6-2017-q2-update-mac, same result as gcc-arm-none-eabi-7-2018-q2-update-mac.
• J-Link software v640
• Nordic nRF52832 dev board with J-Link OB

Code at PC: vendor/cmsis/CMSIS/Include/core_cm4.h:1641

/** \brief  Set Pending Interrupt

    The function sets the pending bit of an external interrupt.

    \param [in]      IRQn  Interrupt number. Value cannot be negative.
 */
__STATIC_INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn)
{
  NVIC->ISPR[(((uint32_t)(int32_t)IRQn) >> 5UL)] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL));
}

Debug stack:

?? @ 0x000008CC (Unknown Source:0)
<signal handler called> @ 0xFFFFFFF1 (Unknown Source:0)
?? @ 0x000005DC (Unknown Source:0)
<signal handler called> @ 0xFFFFFFF9 (Unknown Source:0)
NVIC_SetPendingIRQ @ 0x0001DF44 (/Users/daguhl/quark/vendor/cmsis/CMSIS/Include/core_cm4.h:1641)
...snip...

Debug console:

program     = /Users/daguhl/quark/gcc_eclipse/build_quark_app/quark_app.elf
Toolchain   = /usr/local/gcc-arm-none-eabi-7-2018-q2-update/bin
Client      = /usr/local/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-gdb
Server      = JLinkGDBServer
Server host = localhost
Server port = 2331
Server success
Client success
sdacc_nvic_critical_region_exit (critical_region=...) at ../nrf52/sd_access_s112v6.h:732
732	{

Resetting target

Program received signal SIGTRAP, Trace/breakpoint trap.
0x000008cc in ?? ()

Program received signal SIGTRAP, Trace/breakpoint trap.
0x000008cc in ?? ()

Program received signal SIGTRAP, Trace/breakpoint trap.
0x000008cc in ?? ()

...snip...