46 lines
1.6 KiB
Plaintext
46 lines
1.6 KiB
Plaintext
## Copyright (C) 2016 Jeremiah Orians
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## This file is part of M2-Planet.
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##
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## M2-Planet is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## M2-Planet is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.
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:_start
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'0' SP BP NO_SHIFT MOVE_ALWAYS ; Setup Base Pointer
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;; Prepare argv
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!4 R0 ADD BP ARITH_ALWAYS ; ARGV_address = EBP + 4
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{R0} PUSH_ALWAYS ; Put argv on the stack
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;; Prepare envp
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'0' BP R0 NO_SHIFT MOVE_ALWAYS ; Address we need to load from
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!0 R0 LOAD32 R0 MEMORY ; Get ARGC
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!2 R0 ADD R0 ARITH_ALWAYS ; OFFSET = ARGC + 2
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'0' R0 R0 '1' MOVE_ALWAYS ; OFFSET = OFFSET * WORDSIZE
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'0' R0 R0 ADD BP ARITH2_ALWAYS ; ENVP_address = EBP + OFFSET
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{R0} PUSH_ALWAYS ; Put envp on the stack
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;; Stack offset
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!4 BP ADD BP ARITH_ALWAYS ; Fix ebp
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^~FUNCTION_main CALL_ALWAYS ; Jump right into main
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!1 R7 LOADI8_ALWAYS ; Setup for final exit
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SYSCALL_ALWAYS ; Exit
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# Stub that simply returns
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:divide
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'0' R14 R15 NO_SHIFT MOVE_ALWAYS
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# Stub that simply returns
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:modulus
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'0' R14 R15 NO_SHIFT MOVE_ALWAYS
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