_start (void)
{
__initialize_data(&_sidata, &_sdata, &_edata);
__initialize_bss(&_sbss, &_ebss);
main();
for(;;);
}
_start(void)
{
// Initialise hardware right after reset, to switch clock to higher
// frequency and have the rest of the initialisations run faster.
//
// Mandatory on platforms like Kinetis, which start with the watch dog
// enabled and require an early sequence to disable it.
//
// Also useful on platform with external RAM, that need to be
// initialised before filling the BSS section.
__initialize_hardware_early();
// Use Old Style DATA and BSS section initialisation,
// that will manage a single BSS sections.
#if defined(DEBUG) && (OS_INCLUDE_STARTUP_GUARD_CHECKS)
__data_begin_guard = DATA_GUARD_BAD_VALUE;
__data_end_guard = DATA_GUARD_BAD_VALUE;
#endif
#if !defined(OS_INCLUDE_STARTUP_INIT_MULTIPLE_RAM_SECTIONS)
// Copy the DATA segment from Flash to RAM (inlined).
__initialize_data(&_sidata, &_sdata, &_edata);
#else
// Copy the data sections from flash to SRAM.
for (unsigned int* p = &__data_regions_array_start;
p < &__data_regions_array_end;)
{
unsigned int* from = (unsigned int *) (*p++);
unsigned int* region_begin = (unsigned int *) (*p++);
unsigned int* region_end = (unsigned int *) (*p++);
__initialize_data (from, region_begin, region_end);
}
#endif
#if defined(DEBUG) && (OS_INCLUDE_STARTUP_GUARD_CHECKS)
if ((__data_begin_guard != DATA_BEGIN_GUARD_VALUE)
|| (__data_end_guard != DATA_END_GUARD_VALUE))
{
for (;;)
;
}
#endif
#if defined(DEBUG) && (OS_INCLUDE_STARTUP_GUARD_CHECKS)
__bss_begin_guard = BSS_GUARD_BAD_VALUE;
__bss_end_guard = BSS_GUARD_BAD_VALUE;
#endif
#if !defined(OS_INCLUDE_STARTUP_INIT_MULTIPLE_RAM_SECTIONS)
// Zero fill the BSS section (inlined).
__initialize_bss(&__bss_start__, &__bss_end__);
#else
// Zero fill all bss segments
for (unsigned int *p = &__bss_regions_array_start;
p < &__bss_regions_array_end;)
{
unsigned int* region_begin = (unsigned int*) (*p++);
unsigned int* region_end = (unsigned int*) (*p++);
__initialize_bss (region_begin, region_end);
}
#endif
#if defined(DEBUG) && (OS_INCLUDE_STARTUP_GUARD_CHECKS)
if ((__bss_begin_guard != 0) || (__bss_end_guard != 0))
{
for (;;)
;
}
#endif
// Hook to continue the initialisations. Usually compute and store the
// clock frequency in the global CMSIS variable, cleared above.
__initialize_hardware();
// Get the argc/argv (useful in semihosting configurations).
int argc;
char** argv;
__initialize_args(&argc, &argv);
// Call the standard library initialisation (mandatory for C++ to
// execute the constructors for the static objects).
__run_init_array();
// Call the main entry point, and save the exit code.
int code = main(argc, argv);
// Run the C++ static destructors.
__run_fini_array();
_exit(code);
// Should never reach this, _exit() should have already
// performed a reset.
for (;;)
;
}
_start(void)
{
// Use Old Style Data and BSS section initialization,
// that will initialize a single BSS sections.
#if defined(DEBUG) && defined(OS_INCLUDE_STARTUP_GUARD_CHECKS)
__bss_begin_guard = BSS_GUARD_BAD_VALUE;
__bss_end_guard = BSS_GUARD_BAD_VALUE;
#endif
// Zero fill the bss segment
__initialize_bss(&__bss_start__, &__bss_end__);
#if defined(DEBUG) && defined(OS_INCLUDE_STARTUP_GUARD_CHECKS)
if ((__bss_begin_guard != 0) || (__bss_end_guard != 0))
{
for (;;)
;
}
#endif
#if defined(DEBUG) && defined(OS_INCLUDE_STARTUP_GUARD_CHECKS)
__data_begin_guard = DATA_GUARD_BAD_VALUE;
__data_end_guard = DATA_GUARD_BAD_VALUE;
#endif
// Copy the data segment from Flash to RAM.
// When using startup files, this code is executed via the preinit array.
__initialize_data(&_sidata, &_sdata, &_edata);
#if defined(DEBUG) && defined(OS_INCLUDE_STARTUP_GUARD_CHECKS)
if ((__data_begin_guard != DATA_BEGIN_GUARD_VALUE) || (__data_end_guard != __data_end_guard))
{
for (;;)
;
}
#endif
__initialize_hardware();
// Get the args (useful in semihosting configurations).
int argc;
char** argv;
__initialize_args(&argc, &argv);
// Call the standard library initialisation (mandatory for C++ to
// execute the constructors for the static objects).
__run_init_array();
// Call the main entry point, and save the exit code.
int code = main(argc, argv);
// Run the C++ static destructors.
__run_fini_array();
_exit(code);
// Should never reach this, _exit() should have already
// performed a reset.
for (;;)
;
}