gcc/ada/sigtramp-android.c

/****************************************************************************
 *                                                                          *
 *                         GNAT COMPILER COMPONENTS                         *
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 *                         C/Asm Implementation File                        *
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 ****************************************************************************/

/**************************************************
 * Android version of the __gnat_sigtramp service *
 **************************************************/

#include "sigtramp.h"

/* The ARM port relies on CFI info setup here.  Others such as aarch64
   rely on kernel CFI and may relay to the handler directly.  */

#if defined(__arm__)
#define __SETUP_CFI 1
#else
#define __SETUP_CFI 0
#endif

#if __SETUP_CFI

/* Craft a sigtramp stub providing unwind info for common registers.  */

#define TRAMP_COMMON __gnat_sigtramp_common
extern void TRAMP_COMMON
  (int signo, void *siginfo, void *sigcontext,
   __sigtramphandler_t * handler);

#include <sys/ucontext.h>

void __gnat_sigtramp (int signo, void *si, void *ucontext,
                      __sigtramphandler_t * handler)
{
  struct sigcontext *mcontext = &((ucontext_t *) ucontext)->uc_mcontext;
  TRAMP_COMMON (signo, si, mcontext, handler);
}

#include <sigtramp-android-asm.h>

asm (SIGTRAMP_START(TRAMP_COMMON));
asm (SIGTRAMP_BODY);
asm (SIGTRAMP_END(TRAMP_COMMON));

#else /* !__SETUP_CFI  */

void __gnat_sigtramp (int signo, void *si, void *ucontext,
                      __sigtramphandler_t * handler)
{
  handler (signo, si, ucontext);
}

#endif