Compiling adding extra code in C to NASM, causing errors - c

Question

The closet I have gotten to actually reasonable code is removing -m16 from gcc, but I get 64 bit intruction errors
I am trying to build C to .asm via gcc and objconv, but it outputs unnecessary code, that causes issues with other compiled code.
I also get an error while importing main.c:
main.asm:20: error: binary output format does not support external references
(Original nasm file extension: .s | C converted to nasm: .asm):
Expected output:
setc:
call draw_first_scene
call init_mouse
jmp enable_mouse
Output:
extern _GLOBAL_OFFSET_TABLE_
setc:
push bx
?_001:
db 66H, 0E8H
dd __x86.get_pc_thunk.bx-$-6H
db 66H, 81H, 0C3H
dd _GLOBAL_OFFSET_TABLE_-$-6H
dd 08EC8366H
db 66H, 0E8H
dd draw_first_scene-$-17H
db 66H, 0E8H
dd init_mouse-$-1DH
db 66H, 0E8H
dd enable_mouse-$-23H
dd 08C48366H, 0C3665B66H
__x86.get_pc_thunk.bx:
mov bx, word [si]
and al, 66H
ret
Removed -m16 output:
extern _GLOBAL_OFFSET_TABLE_
setc:
sub rsp, 8
xor eax, eax
call draw_first_scene
xor eax, eax
call init_mouse
xor eax, eax
add rsp, 8
jmp enable_mouse
main.c:
void setc() {
draw_first_scene();
init_mouse();
enable_mouse();
}
boot.s:
bits 16
org 0x7c00
; NASM
%include "bpb.s"
%include "mouse.s"
%include "draw.s"
%include "scene_draw.s"
%include "mouse_draw.s"
; C
%include "main.asm"
boot_start:
xor ax,ax
mov ds,ax
mov ss,ax
mov sp,0x7c00
cld
mov ax,12h
int 10h
jmp 0x0:setc
sti
.main_loop:
hlt
call draw_mouse
jmp .main_loop
.no_mouse:
mov si,noMouseMsg
call print_string
.err_loop:
hlt
jmp .err_loop
bpb.s:
bits 16
org 0x7c00
global bpb_disk_info
mov ax,07c0h
add ax,544
cli
mov ss,ax
mov sp,4096
sti
jmp boot_start
nop
bpb_disk_info:
OEMLabel: db "mkfs.fat"
BytesPerSector: dw 512
SectorsPerCluster: db 1
ReservedForBoot: dw 1
NumberOfFats: db 2
RootDirEntries: dw 224
LogicalSectors: dw 2880
MediumByte: db 0f0h
SectorsPerFat: dw 9
SectorsPerTrack: dw 18
Sides: dw 2
HiddenSectors: dd 0
LargeSectors: dd 0
DriveNo: dw 0
Signature: db 41
VolumeID: dd 0x2d7e5a1a
VolumeLabel: db " "
FileSystem: db "FAT12 "
My build.sh (I am running Linux on repl.it as I am on chromebook):
clear
set echo off
cleanup() {
{
rm -r $cur/node_modules/out
rm -r $cur/node_modules/temp
export temp=$prevtemp
export cur=$prevcur
} &>/dev/null
exit
}
trap cleanup 0
{
export prevtemp=$temp
export pervcur=$cur
export temp=""
export temp2=""
export cur="$(cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P)"
export cur=${cur%/node_modules}
cd $cur
mkdir nasm
mkdir node_modules
cd node_modules
mkdir out
mkdir temp
export temp=${cur}/node_modules/temp
cd $cur/src
} &> /dev/null
for i in $(find . -type f -print); do
if [[ "$i" == *.c ]]; then
export temp=${i/%.c/.o}
gcc -m16 -Wno-implicit-function-declaration -fno-asynchronous-unwind-tables -s -c -o $cur/node_modules/out${temp#.} $cur/src${i#.}
else
cp -f $i $cur/node_modules/out
fi
done
cd $cur/node_modules/out
for i in $(find . -type f -print); do
if [[ "$i" == *.o ]]; then
export temp=${i/%.o/.asm}
{
objconv -fnasm $cur/node_modules/out${i#.}
mv $cur/node_modules/out${temp#.} $cur/nasm${temp#.}
sed -i -e "/^SECTION ./d" $cur/nasm${temp#.}
sed -i -e "s/\s*;/;/g" $cur/nasm${temp#.}
sed -i -e "/^;/d" -e "s/^\([^;]*\);.*$/\1/" $cur/nasm${temp#.}
sed -i -e "/^global/d" -e "s/^\([^global]*\)global.*$/\1/" $cur/nasm${temp#.}
sed -i -e "/^default/d" -e "s/^\([^default]*\)default.*$/\1/" $cur/nasm${temp#.}
sed -i -e "/^extern/d" -e "s/^\([^extern]*\)extern.*$/\1/" $cur/nasm${temp#.}
sed -i -r "/^\s*$/d" $cur/nasm${temp#.}
sed -i -e "s/ / /g" $cur/nasm${temp#.}
sed -i "1s/^/extern _GLOBAL_OFFSET_TABLE_\n/" $cur/nasm${temp#.}
} &> /dev/null
fi
done
{
cd $cur/node_modules
} &> /dev/null
cd $cur/nasm
nasm -O0 -w+other -w+orphan-labels -f bin -o $cur/node_modules/out/boot.bin $cur/nasm/boot.s
cd $cur/node_modules/out
for i in $(find . -type f -print); do
if [[ "$i" == *.o ]]; then
rm $cur/node_modules/out${i#.}
fi
done
{
mkdosfs -C reliq.flp 1440
dd status=noxfer conv=notrunc if=boot.bin of=reliq.flp
rm reliq.iso
mkisofs -quiet -V 'RELIQ' -input-charset iso8859-1 -o reliq.iso -b reliq.flp ./
sleep 0.2
mv reliq.iso $cur
cd $cur
} &> /dev/null
{
qemu-system-x86_64 \
-netdev user,id=mynet0 \
-device ne2k_isa,netdev=mynet0 \
-drive file=reliq.iso,media=cdrom,cache=none \
-device sb16 \
-m 512M \
-cpu Cascadelake-Server \
-smp 1 \
-vga vmware \
-display gtk,grab-on-hover=on,zoom-to-fit=off \
-accel tcg \
-boot menu=on
} &> /dev/null