Fix to debugging problem on Alpha

[Chris Weber]

    I've applied Alexandre's patch to the gcc 2.95.2 source, and 
*finally* I can step over function calls (something I haven't been 
able to do on Tru64 UNIX since gcc 2.8.1).  Wonderful!  Thank you!

(Here comes the other shoe)

   Unfortunately, when I step into a function the parameters aren't 
interpreted correctly:


$ cat x.c
void funct (int i, char *c)
{
    printf ("%d %s\n", i, c);
}



int main (int argc, char* argv[])
{
    funct (3, "abc");
}

$ gcc -g -o x x.c

$ gdb x
GNU gdb 4.18
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This GDB was configured as "alphaev6-dec-osf4.0e"...
(gdb) b main
Breakpoint 1 at 0x120001208: file x.c, line 9.
(gdb) r
Starting program: /usr/users/w/weber/test/pw/x

Breakpoint 1, main (argc=536875264, argv=0x0) at x.c:9
9       {
(gdb) print argc
$1 = 536875264
(gdb) print *argv
Error accessing memory address 0x0: Invalid argument.
(gdb) n
10         funct (3, "abc");
(gdb) print argc
$2 = 1
(gdb) print *argv
$3 = 0x11ffffa60 "/usr/users/w/weber/test/pw/x"
(gdb) s
funct (i=-2147394304,
     c=0x1400210c8 <Error reading address 0x1400210c8: Invalid argument>)
     at x.c:2
2       {
(gdb) print i
$4 = -2147394304
(gdb) print c
$5 = 0x1400210c8 <Error reading address 0x1400210c8: Invalid argument>
(gdb) n
3          printf ("%d %s\n", i, c);
(gdb) print i
$6 = 3
(gdb) print c
$7 = 0x14000001f "abc"
(gdb) n
3 abc
4       }
(gdb) c
Continuing.

Program exited with code 06.
(gdb) q
$
-- 

     Chris Weber
     Bucknell Information Services and Resources