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MI: consider addressable unit size when reading/writing memory

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As a user of the target memory read/write interface, the MI code must
adjust its memory allocations to take into account the addressable memory
unitsize of the target.

gdb/ChangeLog:

	mi/mi-main.c (mi_cmd_data_read_memory_bytes): Consider byte
	size.
	(mi_cmd_data_write_memory_bytes): Same.
This commit is contained in:
Simon Marchi 2015-06-15 15:50:31 -04:00
parent a86c90e6ba
commit cfc32360af
2 changed files with 42 additions and 24 deletions
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6
gdb/ChangeLog
View file

@ -1,3 +1,9 @@
2015-06-15 Simon Marchi <simon.marchi@ericsson.com>
* mi/mi-main.c (mi_cmd_data_read_memory_bytes): Consider addressable
memory unit size.
(mi_cmd_data_write_memory_bytes): Same.
2015-06-15 Simon Marchi <simon.marchi@ericsson.com>
* corefile.c (write_memory): Update doc.

60
gdb/mi/mi-main.c
View file

@ -1595,6 +1595,7 @@ mi_cmd_data_read_memory_bytes (char *command, char **argv, int argc)
int ix;
VEC(memory_read_result_s) *result;
long offset = 0;
int unit_size = gdbarch_addressable_memory_unit_size (gdbarch);
int oind = 0;
char *oarg;
enum opt
@ -1650,10 +1651,11 @@ mi_cmd_data_read_memory_bytes (char *command, char **argv, int argc)
- addr);
ui_out_field_core_addr (uiout, "end", gdbarch, read_result->end);
data = xmalloc ((read_result->end - read_result->begin) * 2 + 1);
data = xmalloc (
(read_result->end - read_result->begin) * 2 * unit_size + 1);
for (i = 0, p = data;
i < (read_result->end - read_result->begin);
i < ((read_result->end - read_result->begin) * unit_size);
++i, p += 2)
{
sprintf (p, "%02x", read_result->data[i]);
@ -1762,29 +1764,36 @@ mi_cmd_data_write_memory_bytes (char *command, char **argv, int argc)
char *cdata;
gdb_byte *data;
gdb_byte *databuf;
size_t len, i, steps, remainder;
long int count, j;
size_t len_hex, len_bytes, len_units, i, steps, remaining_units;
long int count_units;
struct cleanup *back_to;
int unit_size;
if (argc != 2 && argc != 3)
error (_("Usage: ADDR DATA [COUNT]."));
addr = parse_and_eval_address (argv[0]);
cdata = argv[1];
if (strlen (cdata) % 2)
error (_("Hex-encoded '%s' must have an even number of characters."),
len_hex = strlen (cdata);
unit_size = gdbarch_addressable_memory_unit_size (get_current_arch ());
if (len_hex % (unit_size * 2) != 0)
error (_("Hex-encoded '%s' must represent an integral number of "
"addressable memory units."),
cdata);
len = strlen (cdata)/2;
if (argc == 3)
count = strtoul (argv[2], NULL, 10);
else
count = len;
len_bytes = len_hex / 2;
len_units = len_bytes / unit_size;
databuf = xmalloc (len * sizeof (gdb_byte));
if (argc == 3)
count_units = strtoul (argv[2], NULL, 10);
else
count_units = len_units;
databuf = xmalloc (len_bytes * sizeof (gdb_byte));
back_to = make_cleanup (xfree, databuf);
for (i = 0; i < len; ++i)
for (i = 0; i < len_bytes; ++i)
{
int x;
if (sscanf (cdata + i * 2, "%02x", &x) != 1)
@ -1792,29 +1801,32 @@ mi_cmd_data_write_memory_bytes (char *command, char **argv, int argc)
databuf[i] = (gdb_byte) x;
}
if (len < count)
if (len_units < count_units)
{
/* Pattern is made of less bytes than count:
/* Pattern is made of less units than count:
repeat pattern to fill memory. */
data = xmalloc (count);
data = xmalloc (count_units * unit_size);
make_cleanup (xfree, data);
steps = count / len;
remainder = count % len;
for (j = 0; j < steps; j++)
memcpy (data + j * len, databuf, len);
/* Number of times the pattern is entirely repeated. */
steps = count_units / len_units;
/* Number of remaining addressable memory units. */
remaining_units = count_units % len_units;
for (i = 0; i < steps; i++)
memcpy (data + i * len_bytes, databuf, len_bytes);
if (remainder > 0)
memcpy (data + steps * len, databuf, remainder);
if (remaining_units > 0)
memcpy (data + steps * len_bytes, databuf,
remaining_units * unit_size);
}
else
{
/* Pattern is longer than or equal to count:
just copy count bytes. */
just copy count addressable memory units. */
data = databuf;
}
write_memory_with_notification (addr, data, count);
write_memory_with_notification (addr, data, count_units);
do_cleanups (back_to);
}