5 ms·

https://azeria-labs.com/arm-on-x86-qemu-user/ https://azeria-labs.com/arm-on-x86-qemu-user/ is one example. You can run some of it (asm64 work but not the objd

https://azeria-labs.com/arm-on-x86-qemu-user/ https://azeria-labs.com/arm-on-x86-qemu-user/ is one example. You can run some of it (asm64 work but not the objdump or gdb, only 32 bit?) by using the docker under macOS ``` docker run -it --entrypoint "/bin/bash" ubuntu:latest ```

ngcc_hk 6y ago
Further if you follow the linked example I still cannot do the objdump or gdb (and hence still not reaching the goal of getting the asm reading). Back to the vector.pcc program, I can compile the vector.pcc program (after adding int main() and some cout etc.) You do need a few more apt install commands (especially the last one to add c++): ``` apt install qemu-user qemu-user-static gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu binutils-aarch64-linux-gnu-dbg build-essential apt install vim apt install arm-linux-gnueabihf apt install gdb-multiarch apt install arm-linux-gnueabihf-gcc apt install g++-aarch64-linux-gnu ``` For the vector source, I wonder why use c++ for testing instead of just c. After adding cout and int main(), the program can run. However, as the linked one seems not work for arm64 so far, I am still somewhere in between and not able to move to the reading assembly part, as the target of all test. Cannot get the ld to work but use a simpler c source can generate something like this: ``` cat vector2c.S .arch armv8-a .file "vector2.c" .text .align 2 .global normSquared .type normSquared, %function normSquared: .LFB0: .cfi_startproc sub sp, sp, #16 .cfi_def_cfa_offset 16 stp x0, x1, [sp] ldr x1, [sp] ldr x0, [sp] mul x1, x1, x0 ldr x2, [sp, 8] ldr x0, [sp, 8] mul x0, x2, x0 add x0, x1, x0 add sp, sp, 16 .cfi_def_cfa_offset 0 ret .cfi_endproc .LFE0: .size normSquared, .-normSquared .align 2 .global main .type main, %function main: .LFB1: .cfi_startproc stp x29, x30, [sp, -32]! .cfi_def_cfa_offset 32 .cfi_offset 29, -32 .cfi_offset 30, -24 mov x29, sp mov x0, 42 str x0, [sp, 16] mov x0, 12 str x0, [sp, 24] ldp x0, x1, [sp, 16] bl normSquared mov w0, 0 ldp x29, x30, [sp], 32 .cfi_restore 30 .cfi_restore 29 .cfi_def_cfa_offset 0 ret .cfi_endproc .LFE1: .size main, .-main .ident "GCC: (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0" .section .note.GNU-stack,"",@progbits ``` from vector2.c ``` #include <stdint.h> struct Vec2 { int64_t x; int64_t y; }; int64_t normSquared(struct Vec2 v) { return v.x * v.x + v.y * v.y; } int main() { struct Vec2 v; v.x = 42; v.y = 12; normSquared(v); return 0; } ```
- tom_mellior 6y ago
  Hacker News uses four space indentation for code blocks, not ``` markers.
ngcc_hk 6y ago
Trying VmWare, VirtualBoxVM, none work. Finally pay and run UTM. Most not working but at least the minimum Debian work. All the commands under https://azeria-labs.com/arm-on-x86-qemu-user/ https://azeria-labs.com/arm-on-x86-qemu-user/ and also this works. You need some basic gcc commands and gdb commands, plus modification of the source so to have a driving main: ``` #include <cstdint> struct Vec2 { int64_t x; int64_t y; }; int64_t normSquared(Vec2 v) { return v.x * v.x + v.y * v.y; } int main() { Vec2 v; v.x = 42; v.y = 10; int64_t x=0; x = normSquared(v); return 0; } // gcc vector.cpp -o vector -Wa,-adhln=vectorO0.s -g -march=native //gcc -ggdb3 -o vectorgdb vector.cpp //gdb vectorgdb ``` Getting the interaction working and now can be back to reading his post!

ngcc_hk 6y ago

Further if you follow the linked example I still cannot do the objdump or gdb (and hence still not reaching the goal of getting the asm reading). Back to the vector.pcc program, I can compile the vector.pcc program (after adding int main() and some cout etc.) You do need a few more apt install commands (especially the last one to add c++): ``` apt install qemu-user qemu-user-static gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu binutils-aarch64-linux-gnu-dbg build-essential apt install vim apt install arm-linux-gnueabihf apt install gdb-multiarch apt install arm-linux-gnueabihf-gcc apt install g++-aarch64-linux-gnu ``` For the vector source, I wonder why use c++ for testing instead of just c. After adding cout and int main(), the program can run. However, as the linked one seems not work for arm64 so far, I am still somewhere in between and not able to move to the reading assembly part, as the target of all test. Cannot get the ld to work but use a simpler c source can generate something like this: ``` cat vector2c.S .arch armv8-a .file "vector2.c" .text .align 2 .global normSquared .type normSquared, %function normSquared: .LFB0: .cfi_startproc sub sp, sp, #16 .cfi_def_cfa_offset 16 stp x0, x1, [sp] ldr x1, [sp] ldr x0, [sp] mul x1, x1, x0 ldr x2, [sp, 8] ldr x0, [sp, 8] mul x0, x2, x0 add x0, x1, x0 add sp, sp, 16 .cfi_def_cfa_offset 0 ret .cfi_endproc .LFE0: .size normSquared, .-normSquared .align 2 .global main .type main, %function main: .LFB1: .cfi_startproc stp x29, x30, [sp, -32]! .cfi_def_cfa_offset 32 .cfi_offset 29, -32 .cfi_offset 30, -24 mov x29, sp mov x0, 42 str x0, [sp, 16] mov x0, 12 str x0, [sp, 24] ldp x0, x1, [sp, 16] bl normSquared mov w0, 0 ldp x29, x30, [sp], 32 .cfi_restore 30 .cfi_restore 29 .cfi_def_cfa_offset 0 ret .cfi_endproc .LFE1: .size main, .-main .ident "GCC: (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0" .section .note.GNU-stack,"",@progbits ``` from vector2.c ``` #include <stdint.h> struct Vec2 { int64_t x; int64_t y; }; int64_t normSquared(struct Vec2 v) { return v.x * v.x + v.y * v.y; } int main() { struct Vec2 v; v.x = 42; v.y = 12; normSquared(v); return 0; } ```

tom_mellior 6y ago
Hacker News uses four space indentation for code blocks, not ``` markers.

ngcc_hk 6y ago

Trying VmWare, VirtualBoxVM, none work. Finally pay and run UTM. Most not working but at least the minimum Debian work. All the commands under https://azeria-labs.com/arm-on-x86-qemu-user/ https://azeria-labs.com/arm-on-x86-qemu-user/ and also this works. You need some basic gcc commands and gdb commands, plus modification of the source so to have a driving main: ``` #include <cstdint> struct Vec2 { int64_t x; int64_t y; }; int64_t normSquared(Vec2 v) { return v.x * v.x + v.y * v.y; } int main() { Vec2 v; v.x = 42; v.y = 10; int64_t x=0; x = normSquared(v); return 0; } // gcc vector.cpp -o vector -Wa,-adhln=vectorO0.s -g -march=native //gcc -ggdb3 -o vectorgdb vector.cpp //gdb vectorgdb ``` Getting the interaction working and now can be back to reading his post!