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https://github.com/justinian/jsix.git
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ea9d20a250
Created the framework for using different loadable panic handlers, loaded by the bootloader. Initial panic handler is panic.serial, which contains its own serial driver and stacktrace code. Other related changes: - Asserts are now based on the NMI handler - panic handlers get installed as the NMI interrupt handler - Changed symbol table generation: now use nm's own demangling and sorting, and include symbol size in the table - Move the linker script argument out of the kernel target, and into the kernel's specific module, so that other programs (ie, panic handlers) can use the kernel target as well - Some asm changes to boot.s to help GDB see stack frames - but this might not actually be all that useful - Renamed user_rsp to just rsp in cpu_state - everything in there is describing the 'user' state
59 lines
1.0 KiB
ArmAsm
59 lines
1.0 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, wait for the scheduler to
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; take over
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.hang:
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hlt
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jmp .hang
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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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