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Fix Ada value printing on PPC64

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The val_print removal patches introduced an Ada regression on PPC64
(probably any big-endian system).

The issue comes because value_field does not understand that Ada
wrapper fields can be bitfields that wrap a non-scalar type.  In this
case the value is already left-justified, so the justification done
there does the wrong thing.

Perhaps it would be good, eventually, to change value_field to
understand this case.  In the meantime this implements an Ada-specific
solution.

gdb/ChangeLog
2020-05-11  Tom Tromey  <tromey@adacore.com>

	* ada-lang.c (ada_value_primitive_field): Now public.
	* ada-lang.h (ada_value_primitive_field): Declare.
	* ada-valprint.c (print_field_values): Use
	ada_value_primitive_field for wrapper fields.
This commit is contained in:
Tom Tromey
2020-05-11 14:57:49 -06:00
parent e000211765
commit 5eb68a39a2
4 changed files with 15 additions and 5 deletions
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5
gdb/ada-lang.c
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@ -204,9 +204,6 @@ static struct symbol *standard_lookup (const char *, const struct block *,
static struct value *ada_search_struct_field (const char *, struct value *, int,
struct type *);
static struct value *ada_value_primitive_field (struct value *, int, int,
struct type *);
static int find_struct_field (const char *, struct type *, int,
struct type **, int *, int *, int *, int *);
@ -7125,7 +7122,7 @@ ada_in_variant (LONGEST val, struct type *type, int field_num)
fields. FIELDNO says which field. Differs from value_primitive_field
only in that it can handle packed values of arbitrary type. */
static struct value *
struct value *
ada_value_primitive_field (struct value *arg1, int offset, int fieldno,
struct type *arg_type)
{