Re: [rfa/testsuite] Extend signull to work with discriptors

[mec.gnu@mindspring.com (Michael Elizabeth Chastain)]

Needs more work:

- copyright year 2004 in signull.c

- did you test it on ia64 and/or ppc?
  can't quite tell from your wording

- this code has ISO problems.

  % cat ptr.c
  typedef long data_t;
  typedef long code_t (void);
  volatile data_t zero[10];
  volatile code_t *desc = (void *) zero;

  % gcc-340 -Wall -S -pedantic -std=iso9899:1990 ptr.c
  ptr.c:4: warning: ISO C forbids qualified function types
  ptr.c:4: warning: ISO C forbids initialization between function pointer and `void *'

  What about:

    code_t * volatile desc = 0;

  But that's semantically different from what you wrote.  Hmmm.  I don't
  think it's possible in ISO C to initialize a pointer-to-code with the
  address of a data object.  Any ideas?

Michael C

===

2004-06-15  Andrew Cagney  <cagney@gnu.org>

	* gdb.base/signull.c (bowler): Replace data_pointer with data_read
	and data_write cases.  Add code_descriptor case.
	(zero, desc): New array and pointer.
	(data, code): Change to simple pointers.
	* gdb.base/signull.exp: Fix probe pattern matching a function
	descriptor SIGSEGV.  Replace data_pointer with data_read and
	data_write tests.