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arch/xtensa: change .bss clear location on start

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Moves the clearing of global variables to the very start
of the chip start up process. This avoids clearing some
globals that are initialized between the new location and
previous location.

Signed-off-by: Filipe Cavalcanti <filipe.cavalcanti@espressif.com>
This commit is contained in:
Filipe Cavalcanti
2025-10-10 15:11:59 -03:00
committed by simbit18
parent 3a74b82e09
commit 151776f0a5
1 changed files with 17 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/xtensa/src/esp32s3/esp32s3_start.c
+17 -17
View File
@@ -332,21 +332,6 @@ noinstrument_function void noreturn_function IRAM_ATTR __esp32s3_start(void)
esp32s3_region_protection();
#ifndef CONFIG_ESPRESSIF_SIMPLE_BOOT
/* Move CPU0 exception vectors to IRAM */
__asm__ __volatile__ ("wsr %0, vecbase\n"::"r" (_init_start));
/* Clear .bss. We'll do this inline (vs. calling memset) just to be
* certain that there are no issues with the state of global variables.
*/
for (uint32_t *dest = (uint32_t *)_sbss; dest < (uint32_t *)_ebss; )
{
*dest++ = 0;
}
#endif
#ifndef CONFIG_SMP
/* Make sure that the APP_CPU is disabled for now */
@@ -496,7 +481,7 @@ noinstrument_function void IRAM_ATTR __start(void)
uint32_t app_drom_size = (uint32_t)_image_drom_size;
uint32_t app_drom_vaddr = (uint32_t)_image_drom_vma;
# ifdef CONFIG_ESPRESSIF_SIMPLE_BOOT
#ifdef CONFIG_ESPRESSIF_SIMPLE_BOOT
__asm__ __volatile__ ("wsr %0, vecbase\n"::"r" (_init_start));
if (bootloader_init() != 0)
@@ -504,7 +489,22 @@ noinstrument_function void IRAM_ATTR __start(void)
ets_printf("Hardware init failed, aborting\n");
while (true);
}
# endif
#endif
#ifndef CONFIG_ESPRESSIF_SIMPLE_BOOT
/* Move CPU0 exception vectors to IRAM */
__asm__ __volatile__ ("wsr %0, vecbase\n"::"r" (_init_start));
/* Clear .bss. We'll do this inline (vs. calling memset) just to be
* certain that there are no issues with the state of global variables.
*/
for (uint32_t *dest = (uint32_t *)_sbss; dest < (uint32_t *)_ebss; )
{
*dest++ = 0;
}
#endif
if (map_rom_segments(app_drom_start, app_drom_vaddr, app_drom_size,
app_irom_start, app_irom_vaddr, app_irom_size) != 0)