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handle variables stored in muliple consecutive registers

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gdb/ChangeLog:

        * value.h (read_frame_register_value): Add declaration.
        * findvar.c (read_frame_register_value): New function.
        (value_from_register): Use read_frame_register_value
        instead of get_frame_register_value + value_contents_copy
        to get value contents.
This commit is contained in:
Joel Brobecker 2011-10-27 17:05:40 +00:00
parent d234ef5c0c
commit b56d6f31a9
3 changed files with 42 additions and 6 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2011-10-27 Joel Brobecker <brobecker@adacore.com>
* value.h (read_frame_register_value): Add declaration.
* findvar.c (read_frame_register_value): New function.
(value_from_register): Use read_frame_register_value
instead of get_frame_register_value + value_contents_copy
to get value contents.
2011-10-27 Doug Evans <dje@google.com>
* cli/cli-cmds.c (source_script_with_search): Pass full path to

37
gdb/findvar.c
View File

@ -623,6 +623,35 @@ default_value_from_register (struct type *type, int regnum,
return value;
}
/* VALUE must be an lval_register value. If regnum is the value's
associated register number, and len the length of the values type,
read one or more registers in FRAME, starting with register REGNUM,
until we've read LEN bytes. */
void
read_frame_register_value (struct value *value, struct frame_info *frame)
{
int offset = 0;
int regnum = VALUE_REGNUM (value);
const int len = TYPE_LENGTH (check_typedef (value_type (value)));
gdb_assert (VALUE_LVAL (value) == lval_register);
while (offset < len)
{
struct value *regval = get_frame_register_value (frame, regnum);
int reg_len = TYPE_LENGTH (value_type (regval));
if (offset + reg_len > len)
reg_len = len - offset;
value_contents_copy (value, offset, regval, value_offset (regval),
reg_len);
offset += reg_len;
regnum++;
}
}
/* Return a value of type TYPE, stored in register REGNUM, in frame FRAME. */
struct value *
@ -661,16 +690,11 @@ value_from_register (struct type *type, int regnum, struct frame_info *frame)
}
else
{
int len = TYPE_LENGTH (type);
struct value *v2;
/* Construct the value. */
v = gdbarch_value_from_register (gdbarch, type, regnum, frame);
/* Get the data. */
v2 = get_frame_register_value (frame, regnum);
value_contents_copy (v, 0, v2, value_offset (v), len);
read_frame_register_value (v, frame);
}
return v;
@ -695,3 +719,4 @@ address_from_register (struct type *type, int regnum, struct frame_info *frame)
return result;
}

3
gdb/value.h
View File

@ -502,6 +502,9 @@ extern struct value *default_value_from_register (struct type *type,
int regnum,
struct frame_info *frame);
extern void read_frame_register_value (struct value *value,
struct frame_info *frame);
extern struct value *value_from_register (struct type *type, int regnum,
struct frame_info *frame);