[Bug tdep/29716] Arm v8 M-profile FNC_RETURN unwinder uses wrong stack

["tomas.vanek at fbl dot cz" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29716

--- Comment #5 from tomas.vanek at fbl dot cz ---
My modifications to ST GTZC_TZSC_MPCBB_TrustZone example to exercise FNC_RETURN
and return from secure to non-secure (LED3 indicates secure mode):

Secure/main.c:
  void SECURE_Mode(funcptr back_ns);
  void NSCalledFromSec(void);
  void NSCalledFromNS(void);
  void SecCalledFromNS(void);

  static void SecCalledFromSec(funcptr back_ns)
  {
        if (back_ns) {
                back_ns();
        }
  }

  CMSE_NS_ENTRY void SECURE_Mode(funcptr back_ns)
  {
        HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 1);

        SecCalledFromSec(back_ns);
  }

  CMSE_NS_ENTRY void SecCalledFromNS(void)
  {
        HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 1);
  }

NonSecure/main.c:

  void NSCalledFromNS(void)
  {
        SecCalledFromNS();
        HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 0);
  }

  void NSCalledFromSec(void)
  {
        HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 0);
        NSCalledFromNS();
  }

  int main(void)
  {
...
add to while loop:
        SECURE_Mode(&NSCalledFromSec);
        HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 0);

-- 
You are receiving this mail because:
You are on the CC list for the bug.