convert an x86 bin to an arm through oahd-helper

oahd-wrapper.c

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>

void help(char* curbin) {
    fprintf(stderr, "%s x86_bin arm64_output\n", curbin);
}

int main(int argc, char** argv) {
    printf("this will sigbus but the bin might be valid\n");
    if (argc < 3) {
        help(argv[0]);
        return 1;
    }

    int x86fd = open(argv[1], O_RDONLY);
    if (x86fd < 0) {
        perror("x86fd");
        return 2;
    }

    int armfd = open(argv[2], O_CREAT | O_WRONLY, 0755);
    if (armfd < 0) {
        perror("armfd");
        return 2;
    }

    char* x86fdstr = calloc(2048, 1);
    char* armfdstr = calloc(2048, 1);

    sprintf(x86fdstr, "%d", x86fd);
    sprintf(armfdstr, "%d", armfd);
    
    char* args[] = {
        "oahd-helper",
        x86fdstr,
        armfdstr,
        NULL,
    };

    execv("/usr/libexec/rosetta/oahd-helper", args);
    perror("execve");
}

Nevermind, turns out my binary needed to be inside MyApp.app/Contents/MacOS/mybinary, not elsewhere.

My next question would be, can this converted binary be run in any way? Opening it will kill it immediately due to it having no signature, and trying to give it a signature results into the following error:

codesign -s "-" --verbose --force Downloads/MyApp.app/Contents/MacOS/mybinary-arm Downloads/MyApp.app/Contents/MacOS/mybinary-arm: main executable failed strict validation