[mdb-discuss] mdb :r command corrupts arguments for 64 bit x86 debug target

[Jürgen Keil]

Can anyone reproduce this:

I'm running SX:CE b129 amd64, bfu'ed to current ON bits;
the same problem exists on OpenSolaris dev build b132.

I'm trying to debug a /usr/sbin/amd64/update_drv problem,
using mdb.  Problem is that the debug target somehow
receives a :r quoted string argument slightly modified.

Here's an example that reproduces the issue with
a 64-bit "echo" test program:

% cat x.c
#include <stdio.h>

int
main(int argc, char **argv)
{
        int i;
        for (i = 1; argv[i] != NULL; i++)
                printf("%s ", argv[i]);
        printf("\n");
        return 0;
}

% cc -m64 -o x x.c

% ./x -d -i '"pci1814,601"' rtls
-d -i "pci1814,601" rtls 

Ok, test program works as expected.
Now the same under mdb control:

% mdb ./x
> :r -d -i '"pci1814,601"' rtls
-d -i "pci1144,601" rtls 
mdb: target has terminated


Note how the "pci1814,601" string
argument was modified when running
under mdb.

The problem does not happen with a
32-bit debug target.
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