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smlrcl.asm
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; /*
; Copyright (c) 2014-2015, Alexey Frunze
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are met:
;
; 1. Redistributions of source code must retain the above copyright notice, this
; list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright notice,
; this list of conditions and the following disclaimer in the documentation
; and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
; ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
; */
;
; /*****************************************************************************/
; /* */
; /* minimal stdlibc */
; /* */
; /*Just enough code for Smaller C to compile itself into a 32-bit Linux "EXE".*/
; /* */
; /*****************************************************************************/
;
; Compile:
; smlrc -nobss -seg32 -no-externs -D _LINUX lb.c lb.asm
; smlrc -nobss -seg32 -no-externs -label 1001 smlrc.c smlrc.asm
; nasm -f bin smlrcl.asm -o smlrcl
; chmod +x smlrcl
;
ImageBase equ 0x08048000
SectionAlignment equ 4096
_text_size_ equ (_text_end_ - _text_start_)
_data_size_ equ ((_rodata_end_ - _rodata_start_) + (_data_end_ - _data_start_))
bits 32
org ImageBase
section .text
; ELF header
db 0x7F,"ELF",1,1,1,0,0,0,0,0,0,0,0,0 ; e_ident (32-bit objects, little-endian, current version)
dw 2 ; e_type (executable)
dw 3 ; e_machine (Intel 80386)
dd 1 ; e_version (current version)
dd Entry ; e_entry
dd ProgHeaders - $$ ; e_phoff
dd 0 ; e_shoff
dd 0 ; e_flags
dw 52 ; e_ehsize
dw 32 ; e_phentsize
dw ProgHeadersSize / 32 ; e_phnum
dw 0 ; e_shentsize
dw 0 ; e_shnum
dw 0 ; e_shstrndx
; Program headers
ProgHeaders:
; .text
dd 1 ; p_type (load)
dd _text_start_ - ImageBase ; p_offset
dd _text_start_ ; p_vaddr
dd _text_start_ ; p_paddr
dd _text_size_ ; p_filesz
dd _text_size_ ; p_memsz
dd 5 ; p_flags (readable, executable)
dd SectionAlignment ; p_align
; .data
dd 1 ; p_type (load)
dd _rodata_start_ - ImageBase ; p_offset
dd _rodata_start_ ; p_vaddr
dd _rodata_start_ ; p_paddr
dd _data_size_ ; p_filesz
dd _data_size_ ; p_memsz
dd 6 ; p_flags (readable, writable)
dd SectionAlignment ; p_align
ProgHeadersSize equ $ - ProgHeaders
align SectionAlignment, db 0
_text_start_:
Entry:
pop eax ; argc
push esp ; argv
push eax ; argc
call ___start__ ; __start__(arc, argv) will call exit(main(argc, argv))
section .rodata
align SectionAlignment, db 0
_rodata_start_:
section .data
align SectionAlignment, db 0
_data_start_:
;;;;;;;;;;;;;;;;
%include "lb.asm"
%include "smlrc.asm"
;;;;;;;;;;;;;;;;
section .text
align SectionAlignment, db 0
_text_end_:
section .rodata
align SectionAlignment, db 0
_rodata_end_:
section .data
align SectionAlignment, db 0
_data_end_:
; file end