| cat <<EOT > hello.ld | |
| ENTRY(_start) | |
| MEMORY | |
| { | |
| ram : ORIGIN = 0x00010000, LENGTH = 0x1000 | |
| } | |
| SECTIONS | |
| { | |
| .text : { *(.text*) } > ram | |
| .rodata : { *(.rodata*) } > ram | |
| .bss : { *(.bss*) } > ram | |
| } | |
| EOT | |
| cat <<EOT > start.s | |
| .thumb | |
| .thumb_func | |
| .global _start | |
| _start: | |
| mov r4,#10 | |
| top: | |
| nop | |
| sub r4,#1 | |
| bne top | |
| mov r7,#0x1 | |
| mov r0,#0 | |
| swi #0 | |
| .word 0xFFFFFFFF | |
| b . | |
| .end | |
| EOT | |
| arm-none-eabi-as --warn --fatal-warnings start.s -o start.o | |
| arm-none-eabi-ld -o notmain.elf -T hello.ld start.o | |
| arm-none-eabi-objdump -D notmain.elf > notmain.list | |
| arm-none-eabi-objcopy notmain.elf notmain.bin -O binary | |
| qemu-arm -d in_asm,cpu,cpu_reset -D hello -cpu cortex-m4 notmain.elf | |
| cat hello |
| #!/usr/bin/env bash | |
| # sudo apt install binutils-arm-none-eabi qemu-system-arm | |
| F='arm' # file name, it will generate: "$F.s, $F.o, $F.elf & $F.memmap" | |
| cat <<EOT > $F.s | |
| .globl _start | |
| _start: | |
| ldr r0,=0x101f1000 | |
| mov r1,#0 | |
| loop: | |
| add r1,r1,#1 | |
| and r1,r1,#7 | |
| add r1,r1,#0x30 | |
| str r1,[r0] | |
| mov r2,#0x0D | |
| str r2,[r0] | |
| mov r2,#0x0A | |
| str r2,[r0] | |
| b loop | |
| EOT | |
| cat <<EOT > $F.memmap | |
| MEMORY | |
| { | |
| rom : ORIGIN = 0x00010000, LENGTH = 32K | |
| } | |
| SECTIONS | |
| { | |
| .text : { *(.text*) } > rom | |
| } | |
| EOT | |
| # Makefile | |
| arm-none-eabi-as $F.s -o $F.o --warn --fatal-warnings | |
| arm-none-eabi-ld $F.o -T $F.memmap -o $F.elf | |
| #arm-none-eabi-objdump -D $F.elf > $F.list | |
| #arm-none-eabi-objcopy $F.elf -O $F.bin | |
| # Run | |
| echo " | |
| To QUIT: | |
| 1. first press Ctrl + A (A is just key a, not the alt key) | |
| 2. release the keys | |
| 3. afterwards type X | |
| Enjoy! | |
| " | |
| read -p "Press enter to continue" | |
| qemu-system-arm -M versatilepb -m 128M -nographic -kernel $F.elf |
| #!/usr/bin/env bash | |
| # sudo apt install gcc-aarch64-linux-gnu | |
| F='arm' # file name, it will generate: "$F.s, $F.o, $F.elf & $F.memmap" | |
| cat <<EOT > $F.s | |
| .text | |
| .globl main | |
| main: | |
| mov x8, #64 | |
| mov x0, #1 | |
| adr x1, msg | |
| mov x2, 13 | |
| svc #0 | |
| ret | |
| msg: | |
| .ascii "hello world\n" | |
| EOT | |
| aarch64-linux-gnu-gcc -static -c arm.s | |
| aarch64-linux-gnu-gcc -static -o arm arm.o | |
| ./arm |
CORE DUMPS: using toolchain gdb: ulimit -c unlimited gdb