119 lines
3.1 KiB
Plaintext
119 lines
3.1 KiB
Plaintext
### GNU Mes --- Maxwell Equations of Software
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### Copyright (C) 2016 Jeremiah Orians
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### Copyright © 2017,2018,2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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###
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### This file is part of GNU Mes.
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###
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### GNU Mes is free software; you can redistribute it and/or modify it
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### 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 (at
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### your option) any later version.
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###
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### GNU Mes is distributed in the hope that it will be useful, but
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### 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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:UNUSED_start
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push___%rbp
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mov____%rsp,%rbp
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sub____$i32,%rsp %0x10a4
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mov____$i8,%rax !0
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movl___%eax,0x32 &GLOBAL___stdin
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mov____$i8,%rax !1
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movl___%eax,0x32 &GLOBAL___stdout
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mov____$i8,%rax !2
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movl___%eax,0x32 &GLOBAL___stderr
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mov____%rbp,%rax
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add____$i8,%rax !8
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mov____(%rax),%rax
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add____$i8,%rax !0x03
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shl____$i8,%rax !0x03
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add____%rbp,%rax
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mov____%rax,0x32 &GLOBAL_environ
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;; push___%rax ;M2-Planet pushes forward
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mov____%rbp,%rax ;argc
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add____$i8,%rax !8
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mov____(%rax),%rax
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push___%rax
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mov____%rbp,%rax ;argv
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add____$i8,%rax !16
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push___%rax
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mov____0x32,%rax &GLOBAL_environ
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push___%rax ;env
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mov____%rdi,%rbp ;M2-Planet calling convention
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add____$i8,%rbp !8
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call32 %FUNCTION_main
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add____$i8,%rsp !0x0
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test___%rax,%rax
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mov____%rax,%rdi
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mov____$i32,%rax %0x3c
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syscall
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hlt
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mov____%rbp,%rsp
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pop____%rbp
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ret
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:_start
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COPY_rsp_to_rbp ; Protect rsp
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;; Prepare argv
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LOAD_BASE_ADDRESS_rax %8 ; ARGV_address = RBP + 8
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PUSH_RAX ; Put argv on the stack
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;; Prepare envp
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COPY_rbp_to_rax ; Address we need to load from
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LOAD_INTEGER ; Get ARGC
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ADD_IMMEDIATE_to_rax %2 ; OFFSET = ARGC + 2
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SAL_rax_Immediate8 !3 ; OFFSET = OFFSET * WORDSIZE
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ADD_rbp_to_rax ; ENVP_address = RSP + OFFSET
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PUSH_RAX ; Put envp on the stack
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;; mes c lib environ
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mov____%rax,0x32 &GLOBAL_environ
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;; mes c lib io
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mov____$i8,%rax !0
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movl___%eax,0x32 &GLOBAL___stdin
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mov____$i8,%rax !1
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movl___%eax,0x32 &GLOBAL___stdout
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mov____$i8,%rax !2
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movl___%eax,0x32 &GLOBAL___stderr
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LOAD_IMMEDIATE_rax &GLOBAL___stdin
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PUSH_RAX #_common_recursion
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LOAD_IMMEDIATE_rax %0
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POP_RBX # _common_recursion
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STORE_INTEGER
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LOAD_IMMEDIATE_rax &GLOBAL___stdout
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PUSH_RAX #_common_recursion
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LOAD_IMMEDIATE_rax %1
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POP_RBX # _common_recursion
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STORE_INTEGER
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LOAD_IMMEDIATE_rax &GLOBAL___stderr
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PUSH_RAX #_common_recursion
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LOAD_IMMEDIATE_rax %2
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POP_RBX # _common_recursion
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STORE_INTEGER
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;; Stack offset
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ADD_IMMEDIATE_to_rbp %8 ; Fix rbp
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;; Perform the main loop
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CALL_IMMEDIATE %FUNCTION_main
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mov____%rax,%rdi
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mov____$i32,%rax SYS_exit
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syscall
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