71 lines
1.4 KiB
ArmAsm
71 lines
1.4 KiB
ArmAsm
/**
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* \brief Startup code for Genode 64Bit applications
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* \author Sebastian Sumpf
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* \date 2011-05-11
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*/
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/*
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* Copyright (C) 2011-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/*--- .text (program code) -------------------------*/
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.text
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.global _start
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_start:
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movq __initial_ax@GOTPCREL(%rip), %rbx
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movq %rax, (%rbx)
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movq __initial_di@GOTPCREL(%rip), %rbx
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movq %rdi, (%rbx)
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movq __initial_sp@GOTPCREL(%rip), %rax
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movq %rsp, (%rax)
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/* XXX Switch to our own stack. */
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leaq _stack_high@GOTPCREL(%rip),%rax
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movq (%rax), %rsp
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/* Clear the base pointer so that stack backtraces will work. */
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xorq %rbp,%rbp
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/* Jump into init C code */
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call _main
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/* We should never get here since _main does not return */
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1: int $3
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jmp 2f
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.ascii "_main() returned."
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2: jmp 1b
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.globl __dso_handle
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__dso_handle: .quad 0
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/*--- .eh_frame (exception frames) -----------------*/
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/*
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.section .eh_frame,"aw"
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.global __EH_FRAME_BEGIN__
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__EH_FRAME_BEGIN__:
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*/
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/*--- .bss (non-initialized data) ------------------*/
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.bss
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.p2align 8
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.global _stack_low
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_stack_low:
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.space 64*1024
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.global _stack_high
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_stack_high:
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/* initial value of the RSP, RAX and RDI register */
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.globl __initial_sp
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.globl __initial_ax
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.globl __initial_di
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__initial_sp: .space 8
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__initial_ax: .space 8
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__initial_di: .space 8
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