88 lines
1.2 KiB
ArmAsm
88 lines
1.2 KiB
ArmAsm
/* $Id$ */
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/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS uKernel */
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.section .text
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/* exit */
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.global _exit
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.type _exit, @function
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_exit:
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mov $0x1, %eax
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int $0x80
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ret
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/* start */
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_start:
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/* reset the stack */
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xor %ebp, %ebp
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/* setup the environment */
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mov (%esp), %eax /* argc */
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mov %esp, %ebx /* argv */
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add $0x4, %ebx
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mov %eax, %ecx /* envp */
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shl $2, %ecx
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add %ebx, %ecx
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#if defined(__ELF__)
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mov %ecx, %edx /* auxv */
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auxv:
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cmpl $0x0, (%edx)
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jz auxv_done
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add $0x4, %edx
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jmp auxv
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auxv_done:
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add $0x4, %edx
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#endif
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push %ebp
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push %esp
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mov %esp, %ebp
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push %ecx
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push %ebx
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push %eax
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#if defined(__ELF__)
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push %edx
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#endif
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#if defined(__SSP__)
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/* initialize SSP */
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call __stack_chk_setup
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#endif
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/* run the userland kernel */
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call main
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/* exit the userland kernel */
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mov %ebp, %esp
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push %eax
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call exit
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hlt
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/* write */
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.global _write
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.type _write, @function
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_write:
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mov $0x4, %eax
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int $0x80
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ret
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#if defined(__NetBSD__)
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/* NetBSD emulation */
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# define __NetBSD_Version__ 600000000
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.section ".note.netbsd.ident", "a"
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.p2align 2
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.long 7
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.long 4
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.long 1
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.ascii "NetBSD\0\0"
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.long __NetBSD_Version__
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.previous
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.p2align 2
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#endif
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