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When debugging, or in panic callstacks, the BSP idle thread used to be reported as `_kernel_start`, because it was just the loop at the end of that assembly function. Now, wrap that loop in a separate symbol called `bsp_idle` to make it clearer that the cpu is in the idle thread.
62 lines
1.1 KiB
ArmAsm
62 lines
1.1 KiB
ArmAsm
MAGIC equ 'j6KERNEL' ; jsix kernel header magic number
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section .header
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align 8
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global _kernel_header
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_kernel_header:
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dq MAGIC ; Kernel header magic
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dw 32 ; Kernel header length
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dw 2 ; Header version 2
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dw VERSION_MAJOR ; Kernel version
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dw VERSION_MINOR
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dw VERSION_PATCH
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dw 0 ; reserved
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dd VERSION_GITSHA
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dq 0 ; Flags
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section .text
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align 16
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global _kernel_start:function (_kernel_start.end - _kernel_start)
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global _kernel_start.real
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_kernel_start:
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push rbp ; Never executed, fake function prelude
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mov rbp, rsp ; to calm down gdb
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.real:
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cli
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mov rsp, idle_stack_end
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sub rsp, 16
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mov rbp, rsp
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extern kernel_main
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call kernel_main
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; Kernel init is over, fall through to bsp_idle and wait for
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; the scheduler to take over
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.end:
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global bsp_idle:function (bsp_idle.end - bsp_idle)
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bsp_idle:
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hlt
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jmp bsp_idle
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.end:
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global interrupts_enable
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interrupts_enable:
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sti
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ret
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global interrupts_disable
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interrupts_disable:
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cli
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ret
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section .bss
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align 0x100
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idle_stack_begin:
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resb 0x4000 ; 16KiB stack space
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global idle_stack_end
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idle_stack_end:
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