Hi guys and girls,

This little patch o' mine implements the command "info proc map" for
corefiles in GDB. Initially, this feature is only provided for live
process being debugged. We decided that it would be good to have such
functionality for corefiles as well, since this information (the memory
mappings) is available inside them.

This was something that Thiago and I have discussed for some time, and
it took a little while for me to figure out how things worked in this
part of the code. I really don't know if this is the right way to
implement this, so I'd be glad if you could take a look and give your
opinions.

It's not architecture-dependend so this time you'll be able to test
without problems. Comments and reviews are welcome, as always.

This is a little example of this feature working:

sergio@miki ~/work/gdb/build-32/gdb $ ./gdb /tmp/teste core.13754
GNU gdb (GDB) 6.8.50.20081218-cvs
...
(gdb) info proc map
exe = '/tmp/teste'
Mapped address spaces:

        Start Addr   End Addr       Size objfile
         0x8048000  0x8049000     0x1000 /tmp/teste
         0x8049000  0x804a000     0x1000 /tmp/teste
         0x804a000  0x804b000     0x1000 /tmp/teste
        0xb7e93000 0xb7e94000     0x1000
        0xb7e94000 0xb7fbe000   0x12a000
        0xb7fbe000 0xb7fc0000     0x2000
        0xb7fc0000 0xb7fc1000     0x1000
        0xb7fc1000 0xb7fc5000     0x4000
        0xb7fe4000 0xb7ffe000    0x1a000 /lib/ld-linux.so.2
        0xb7ffe000 0xb7fff000     0x1000 /lib/ld-linux.so.2
        0xb7fff000 0xb8000000     0x1000 /lib/ld-linux.so.2
        0xbffeb000 0xc0000000    0x15000
        0xffffe000 0xfffff000     0x1000 system-supplied DSO at
0xffffe000


The corefile used here (core.13754) was generated using the "gcore"
command inside GDB.

Regards,

-- 
Sérgio Durigan Júnior
Linux on Power Toolchain - Software Engineer
Linux Technology Center - LTC
IBM Brazil


2008-12-18  Sergio Durigan Junior  <sergiodj@linux.vnet.ibm.com>

	* corelow.c: Including extra header files in order to be able
	to use proper data structures for the "info proc map".
	(print_proc_map_iter): New function.
	(core_print_proc_map): Likewise.
	(init_core_ops): Initializing to_print_proc_map method for
	corefile target_ops.
	* linux-nat.c (linux_nat_print_proc_map): New function.
	(linux_nat_info_proc_cmd): Handling the "info proc map"
	for corefiles.
	(linux_nat_add_target): Initializing to_print_proc_map method
	for Linux target_ops.
	* target.c (update_current_target): Inherit to_print_proc_map.
	(dummy_print_proc_map): New function.
	(init_dummy_target): Initializing to_print_proc_map method
	for dummy target_ops.
	* target.h (struct target_ops): Adding method to_print_proc_map.
	(target_print_proc_map): New define.