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gdb/gdb-6.5-bz237872-ppc-long-double.patch

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- Enable PowerPC to print 128-bit long double variables (BZ 237872). - New testcase for 32bit inferiors on 64bit hosts. - Resolves: rhbz#237872 - Related: rhbz#232014
2007-04-25 21:13:29 +00:00
2007-04-20 Luis Machado <luisgpm@br.ibm.com>
* rs6000-tdep.c (rs6000_gdbarch_init): Set the long double format for
powerpc64.
* configure.host : Set the host long double format for powerpc64 to be
a 128-bit type defined in libiberty/floatformat.c.
* ppc-linux-tdep.c (ppc_linux_init_abi): Remove code that sets long double
size to 8 bytes. This breaks expression evaluation by overriding the
default.
* floatformat.c : Introduce default floatformat structs to describe the
128-bit long double found on the powerpc64. Description does not fully
describe this format which is actually a pair of 64-bit doubles. However
we are relying on floatformat_to_doublest() recognizing that this is
also the default host floatformat.
* floatformat.h : Default floatformat structs for powerpc64 128-bit
long doubles.
Index: ./gdb/configure.host
===================================================================
--- ./gdb/configure.host.orig 2007-04-21 23:51:06.000000000 -0300
+++ ./gdb/configure.host 2007-04-21 23:51:09.000000000 -0300
@@ -179,6 +179,11 @@
gdb_host_double_format="&floatformat_ieee_double_big"
gdb_host_long_double_format="&floatformat_m68881_ext"
;;
+powerpc64-*-*)
+ gdb_host_float_format=0
+ gdb_host_double_format=0
+ gdb_host_long_double_format="&floatformat_ppc64_long_double_big"
+ ;;
*)
gdb_host_float_format=0
gdb_host_double_format=0
Index: ./gdb/rs6000-tdep.c
===================================================================
--- ./gdb/rs6000-tdep.c.orig 2007-04-21 23:51:06.000000000 -0300
+++ ./gdb/rs6000-tdep.c 2007-04-21 23:51:09.000000000 -0300
@@ -3442,7 +3442,19 @@
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
if (sysv_abi)
- set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
+ {
+ int byte_order = gdbarch_byte_order (gdbarch);
+
+ if (byte_order == BFD_ENDIAN_BIG)
+ set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_big);
+ else if (byte_order == BFD_ENDIAN_LITTLE)
+ set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_little);
+ else
+ internal_error (__FILE__, __LINE__,
+ _("rs6000_gdbarch_init: "
+ "bad byte order"));
+ set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
+ }
else
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_char_signed (gdbarch, 0);
Index: ./include/floatformat.h
===================================================================
--- ./include/floatformat.h.orig 2007-04-21 23:51:06.000000000 -0300
+++ ./include/floatformat.h 2007-04-21 23:51:09.000000000 -0300
@@ -118,6 +118,9 @@
extern const struct floatformat floatformat_ia64_spill_little;
extern const struct floatformat floatformat_ia64_quad_big;
extern const struct floatformat floatformat_ia64_quad_little;
+/* ppc64 long double implemented as 2 doubles */
+extern const struct floatformat floatformat_ppc64_long_double_big;
+extern const struct floatformat floatformat_ppc64_long_double_little;
/* Convert from FMT to a double.
FROM is the address of the extended float.
Index: ./libiberty/floatformat.c
===================================================================
--- ./libiberty/floatformat.c.orig 2007-04-21 23:51:06.000000000 -0300
+++ ./libiberty/floatformat.c 2007-04-21 23:51:09.000000000 -0300
@@ -106,6 +106,25 @@
floatformat_always_valid
};
+/* floatformats for ppc64 long double, big and little endian. */
+/* The layout is a pair of doubles. Don't use this description to pass */
+/* information to get_field(). The bit size is the important thing. */
+const struct floatformat floatformat_ppc64_long_double_big =
+{
+ floatformat_big, 128, 0, 1, 11, 1023, 2047, 12, 52,
+ floatformat_intbit_no,
+ "floatformat_ppc64_long_double_big",
+ floatformat_always_valid
+};
+
+const struct floatformat floatformat_ppc64_long_double_little =
+{
+ floatformat_little, 128, 0, 1, 11, 1023, 2047, 12, 52,
+ floatformat_intbit_no,
+ "floatformat_ppc64_long_double_little",
+ floatformat_always_valid
+};
+
/* floatformat for IEEE double, little endian byte order, with big endian word
ordering, as on the ARM. */
Index: ./gdb/ppc-linux-tdep.c
===================================================================
--- ./gdb/ppc-linux-tdep.c.orig 2007-04-21 19:48:50.000000000 -0300
+++ ./gdb/ppc-linux-tdep.c 2007-04-22 00:29:50.000000000 -0300
@@ -1059,7 +1059,8 @@
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
+#if 0
+ /* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
Supplement says that long doubles are sixteen bytes long.
However, as one of the known warts of its ABI, PPC GNU/Linux uses
eight-byte long doubles. GCC only recently got 128-bit long
@@ -1068,6 +1069,7 @@
double' on PPC GNU/Linux are non-conformant. */
/* NOTE: cagney/2005-01-25: True for both 32- and 64-bit. */
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
+#endif
if (tdep->wordsize == 4)
{
- Upgrade to GDB 6.7. Drop redundant patches, forward-port remaining ones. - Fix rereading of the main executable on its change.
2007-11-01 20:24:20 +00:00
2007-10-17 Jan Kratochvil <jan.kratochvil@redhat.com>
Port to GDB-6.7.
diff -u -u -X /home/jkratoch/.diffi.list -rup gdb-6.7-patched/gdb/gdbtypes.c gdb-6.7/gdb/gdbtypes.c
--- gdb-6.7-patched/gdb/gdbtypes.c 2007-09-05 02:51:48.000000000 +0200
+++ gdb-6.7/gdb/gdbtypes.c 2007-10-17 12:09:00.000000000 +0200
@@ -95,6 +95,10 @@ const struct floatformat *floatformats_v
&floatformat_vax_d,
&floatformat_vax_d
};
+const struct floatformat *floatformat_ppc64_long_double[BFD_ENDIAN_UNKNOWN] = {
+ &floatformat_ppc64_long_double_big,
+ &floatformat_ppc64_long_double_little
+};
struct type *builtin_type_ieee_single;
struct type *builtin_type_ieee_double;
diff -u -u -X /home/jkratoch/.diffi.list -rup gdb-6.7-patched/gdb/gdbtypes.h gdb-6.7/gdb/gdbtypes.h
--- gdb-6.7-patched/gdb/gdbtypes.h 2007-09-05 02:51:48.000000000 +0200
+++ gdb-6.7/gdb/gdbtypes.h 2007-10-17 12:08:30.000000000 +0200
@@ -1121,6 +1121,7 @@ extern const struct floatformat *floatfo
extern const struct floatformat *floatformats_ia64_quad[BFD_ENDIAN_UNKNOWN];
extern const struct floatformat *floatformats_vax_f[BFD_ENDIAN_UNKNOWN];
extern const struct floatformat *floatformats_vax_d[BFD_ENDIAN_UNKNOWN];
+extern const struct floatformat *floatformat_ppc64_long_double[BFD_ENDIAN_UNKNOWN];
extern struct type *builtin_type_ieee_single;
extern struct type *builtin_type_ieee_double;
diff -u -u -X /home/jkratoch/.diffi.list -rup gdb-6.7-patched/gdb/rs6000-tdep.c gdb-6.7/gdb/rs6000-tdep.c
--- gdb-6.7-patched/gdb/rs6000-tdep.c 2007-10-16 20:52:45.000000000 +0200
+++ gdb-6.7/gdb/rs6000-tdep.c 2007-10-17 12:07:54.000000000 +0200
@@ -3755,16 +3755,7 @@ rs6000_gdbarch_init (struct gdbarch_info
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
if (sysv_abi)
{
- int byte_order = gdbarch_byte_order (gdbarch);
-
- if (byte_order == BFD_ENDIAN_BIG)
- set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_big);
- else if (byte_order == BFD_ENDIAN_LITTLE)
- set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_little);
- else
- internal_error (__FILE__, __LINE__,
- _("rs6000_gdbarch_init: "
- "bad byte order"));
+ set_gdbarch_long_double_format (gdbarch, floatformat_ppc64_long_double);
set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
}
else
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