Given the following code:
float global_float = 0.0;
void
set_float (float f)
{
global_float = f;
}
GDB incorrectly calls set_float if the set_float function is marked
as prototyped:
(gdb) call set_float (5.0)
(gdb) print global_float
$1 = 2048
What happens, when the function is marked as prototyped, is that
GDB finds that the argument is a float, casts the value given in
the expression to a float, and then gives that float to ppc-aix/
ppc-lynx178's push_dummy_call gdbarch routine. The latter then blindly
copies it as is in the first floating-point register, instead of
making sure that it has the proper format first.
gdb/ChangeLog:
* rs6000-aix-tdep.c (rs6000_push_dummy_call): Convert
floating point registers to register type before storing
value.
* rs6000-lynx178-tdep.c (rs6000_lynx178_push_dummy_call):
Likewise.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
gdb/ChangeLog:
* defs.h (enum gdb_osabi): Add GDB_OSABI_LYNXOS178.
* osabi.c (gdb_osabi_names): Add entry for GDB_OSABI_LYNXOS178.
* xcoffread.c (xcoff_get_core_n_import_files): New function.
(xcoff_get_n_import_files): New function.
* xcoffread.h (xcoffread.h): Add declaration.
* rs6000-aix-tdep.c: #include "xcoffread.h".
(rs6000_aix_osabi_sniffer): Do not return GDB_OSABI_AIX for
XCOFF executables that do not depend on any shared library.
* rs6000-lynx178-tdep.c: New file.
* configure.tgt: Add powerpc-*-lynx*178 handling.
* Makefile.in (ALL_TARGET_OBS): Add rs6000-lynx178-tdep.o.
(ALLDEPFILES): Add rs6000-lynx178-tdep.c.
Joel Brobecker
Joel Brobecker