Re: [Qemu-devel] [PATCH 0/2] ARM: fix commandline handling forsemihosted executables

[riku voipio <riku.voipio@iki.fi>]

On 01/07/2011 05:56 PM, Peter Maydell wrote:
> Or you can just test "by hand":

Got it. For anyone wondering into this thread, if you use ubuntu/linaro 
toolchains to compile the example below, you need a -marm flag for the 
compiler or you'll get a weird error on swi...

Looks good, I'll add these the next batch of patches.

> #include<stdio.h>
>
> struct datablock {
>     char *string;
>     int buflen;
> };
>
> char buf[20];
>
> int main(int argc, char **argv) {
>     int r, i;
>     struct datablock datablock;
>     printf("semihosting-cmd test: argc %d\n", argc);
>     for (i = 0; i<  argc; i++) {
>        printf("argv[%d]: %s\n", i, argv[i]);
>     }
>     datablock.string = buf;
>     datablock.buflen = sizeof(buf);
>     {
>        register int r0 asm ("r0") = 0x15;
>        register void * r1 asm ("r1") =&datablock;
>        register int result asm ("r0");
>        __asm__ __volatile__ (
>        "svc 0x123456"
>        : "=r" (result)
>        : "r" (r0), "r" (r1)
>        : "cc", "memory");
>        r = result;
>     }
>     printf("semihosting returned status %d\n", r);
>     if (r == 0) {
>         printf("and string '%s'\n", datablock.string);
>     }
>     return 0;
> }
>
> -- PMM