[9fans] impressive

[Ronald G Minnich <rminnich@lanl.gov>]

This program:

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

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

main (int argc, char *argv[])
{
     unsigned char buf[8], *p;
     int fd_msr, i;
     unsigned long addr = 0;

     if (argc < 3) {
         printf("usage:wrmsr reg value\n");
         exit(1);
     }
     addr = strtoul(argv[1], NULL, 0);
     p = argv[2];

     printf("MSR register 0x%lx => ", addr);
     for (i = 7; i > 0; i--) {
         buf[i] = strtol(p, &p, 16);
         p++;
         printf("%2.2x:", buf[i]);
     }
     buf[i] = strtol(p, &p, 16);
     printf("%2.2x\n", buf[i]);

     fd_msr = open("/dev/cpu/0/msr", O_WRONLY);
     lseek(fd_msr, addr, SEEK_SET);
     if (write(fd_msr, buf, 8) < 0)
         perror("");
}

compiles to a 512KB binary on linux with -static

Well, *I'm* impressed anyway.

[[ standard old guy story about "my first Unix box" and "nobody knows
the value of 2 bits anymore" and "what's with these GNU kids today"
deleted -- ed.]]

yy* symbols are in there btw. And, don't worry, some pthreads symbols
made it in as well. Don't want main() to be too lonely!

ron