CONFIG_MAIN_STACK_SIZE¶

Size of stack for initialization and main thread

Type: int

Help¶

When the initialization is complete, the thread executing it then
executes the main() routine, so as to reuse the stack used by the
initialization, which would be wasted RAM otherwise.

After initialization is complete, the thread runs main().

Defaults¶

4096
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
2048
4096 if 64BIT
4096
4096 if 64BIT
4096 if COVERAGE_GCOV
2048
8192
2048 if COVERAGE_GCOV
1024 if TEST_ARM_CORTEX_M
512 if ZTEST && !(RISCV || X86)
1024

Kconfig definitions¶

At <Zephyr Boards>/arm/mps2_an385/Kconfig.defconfig:49

Included via Kconfig:8 → Kconfig.zephyr:22

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 4096
    depends on COVERAGE && BOARD_MPS2_AN385

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:30

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:43

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:41

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:38

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

At <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:12

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6 → <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

At <Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:38

Included via Kconfig:8 → Kconfig.zephyr:25 → <BuildDir>/kconfig/Kconfig.soc.defconfig:1 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_SERIES_RISCV_TELINK_B91

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em4:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:14

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM4 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em5d:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:15

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM5D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em6:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:16

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM6 && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em7d:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:17

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM7D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em9d:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:19

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM9D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig.em11d:30

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsdp/Kconfig.defconfig:20

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_EMSDP_EM11D && SOC_ARC_EMSDP

At <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig.em7d:43

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_emsk/Kconfig.defconfig:10

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_EMSK_EM7D && SOC_EMSK

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em:41

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:12

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM && SOC_NSIM

At <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig.em7d_v22:38

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/arc/snps_nsim/Kconfig.defconfig:13

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on ARC_MPU_VER = 2 && SOC_NSIM_EM7D_V22 && SOC_NSIM

At <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.ae350:12

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6 → <Zephyr SoC>/riscv/riscv-privilege/andes_v5/Kconfig.defconfig.series:9

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_RISCV_ANDES_AE350 && SOC_SERIES_RISCV_ANDES_V5

At <Zephyr SoC>/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series:38

Included via Kconfig:8 → Kconfig.zephyr:27 → <Zephyr SoC>/riscv/riscv-privilege/Kconfig.defconfig:6

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 2048
    depends on SOC_SERIES_RISCV_TELINK_B91

At <Zephyr Architecture>/arc/Kconfig:364

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12

Menu path: (Top)

config MAIN_STACK_SIZE
    int
    default 4096 if 64BIT

At <Zephyr Architecture>/arm64/core/Kconfig:54

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12 → <Zephyr Architecture>/arm64/Kconfig:32

Menu path: (Top) → ARM64 Options

config MAIN_STACK_SIZE
    int
    default 4096
    depends on ARM64

At <Zephyr Architecture>/riscv/Kconfig:147

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12

Menu path: (Top) → RISCV Options

config MAIN_STACK_SIZE
    int
    default 4096 if 64BIT
    depends on RISCV

At <Zephyr Architecture>/sparc/Kconfig:37

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12

Menu path: (Top) → SPARC Options

config MAIN_STACK_SIZE
    int
    default 4096 if COVERAGE_GCOV
    default 2048
    depends on SPARC

At <Zephyr Architecture>/x86/core/Kconfig.intel64:8

Included via Kconfig:8 → Kconfig.zephyr:39 → <Zephyr Architecture>/Kconfig:12 → <Zephyr Architecture>/x86/Kconfig:483

Menu path: (Top) → X86 Architecture Options

config MAIN_STACK_SIZE
    int
    default 8192
    depends on X86_64 && X86

At <Zephyr Kernel>/Kconfig:139

Included via Kconfig:8 → Kconfig.zephyr:40

Menu path: (Top) → General Kernel Options

config MAIN_STACK_SIZE
    int "Size of stack for initialization and main thread"
    default 2048 if COVERAGE_GCOV
    default 1024 if TEST_ARM_CORTEX_M
    default 512 if ZTEST && !(RISCV || X86)
    default 1024
    help
      When the initialization is complete, the thread executing it then
      executes the main() routine, so as to reuse the stack used by the
      initialization, which would be wasted RAM otherwise.

      After initialization is complete, the thread runs main().

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)