* gdb.python/py-strfns.exp (test_strfns_core_file): Use
gdb_gcore_cmd.
* gdb.cell/gcore.exp: Use gdb_gcore_cmd.
* gdb.base/gcore.exp: Use gdb_gcore_cmd.
* gdb.base/gcore-relro.exp: Use gdb_gcore_cmd.
* gdb.base/gcore-buffer-overflow.exp: Use gdb_gcore_cmd.
* gdb.base/auxv.exp: Use gdb_gcore_cmd.
* gdb.arch/vsx-regs.exp: Use gdb_gcore_cmd.
* gdb.arch/system-gcore.exp: Use gdb_gcore_cmd.
* gdb.arch/pa-nullify.exp (test_core_bt): Use gdb_gcore_cmd.
* lib/gdb.exp (gdb_gcore_cmd): New proc.
PR 11804
* defs.h (find_memory_region_ftype): New comment. New arg modified.
* fbsd-nat.c (fbsd_find_memory_regions): Add the passed modified value.
* gcore.c (gcore_create_callback): New function comment. Add modified
parameter. Only write modified regions. Set SEC_READONLY exactly
according to MODIFIED.
(objfile_find_memory_regions): Ignore separate debug info files. Ass
the passed modified value to FUNC.
* gnu-nat.c (gnu_find_memory_regions): Add the passed modified value.
* linux-tdep.c (linux_find_memory_regions): Try to reads smaps file
first. New variables modified and has_anonymous. Parse the lines of
smaps file. Add the passed MODIFIED value to FUNC.
* procfs.c (find_memory_regions_callback): Add the passed modified
value.
gdb/testsuite/
PR 11804
* gdb.base/gcore-relro.exp: New file.
* gdb.base/gcore-relro-main.c: New file.
* gdb.base/gcore-relro-lib.c: New file.
