gdb_server -- subroutinize memory map logic
Put the memory map logic into its own subroutine. This will make it a bit easier to package bugfixes, and simplifies the query packet handling. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell
parent
bf1e9a83c8
commit
44aaba3d08
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@ -1647,6 +1647,118 @@ static int compare_bank (const void * a, const void * b)
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}
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}
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static int gdb_memory_map(struct connection *connection,
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struct target *target, char *packet, int packet_size)
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{
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/* We get away with only specifying flash here. Regions that are not
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* specified are treated as if we provided no memory map(if not we
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* could detect the holes and mark them as RAM).
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* Normally we only execute this code once, but no big deal if we
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* have to regenerate it a couple of times.
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*/
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struct flash_bank *p;
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char *xml = NULL;
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int size = 0;
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int pos = 0;
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int retval = ERROR_OK;
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struct flash_bank **banks;
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int offset;
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int length;
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char *separator;
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int blocksize;
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uint32_t ram_start = 0;
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int i;
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/* skip command character */
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packet += 23;
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offset = strtoul(packet, &separator, 16);
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length = strtoul(separator + 1, &separator, 16);
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xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
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/* Sort banks in ascending order. We need to report non-flash
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* memory as ram (or rather read/write) by default for GDB, since
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* it has no concept of non-cacheable read/write memory (i/o etc).
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*
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* FIXME Most non-flash addresses are *NOT* RAM! Don't lie.
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*/
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banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count());
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for (i = 0; i < flash_get_bank_count(); i++) {
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p = get_flash_bank_by_num(i);
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if (p == NULL) {
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free(banks);
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retval = ERROR_FAIL;
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gdb_send_error(connection, retval);
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return retval;
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}
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banks[i] = p;
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}
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qsort(banks, flash_get_bank_count(), sizeof(struct flash_bank *),
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compare_bank);
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for (i = 0; i < flash_get_bank_count(); i++) {
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p = banks[i];
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if (ram_start < p->base)
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xml_printf(&retval, &xml, &pos, &size,
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"<memory type=\"ram\" start=\"0x%x\" "
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"length=\"0x%x\"/>\n",
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ram_start, p->base-ram_start);
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/* If device has uneven sector sizes, eg. str7, lpc
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* we pass the smallest sector size to gdb memory map
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*
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* FIXME Don't lie about flash regions with different
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* sector sizes; just tell GDB about each region as
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* if it were a separate flash device.
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*/
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blocksize = gdb_calc_blocksize(p);
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xml_printf(&retval, &xml, &pos, &size,
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"<memory type=\"flash\" start=\"0x%x\" "
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"length=\"0x%x\">\n" \
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"<property name=\"blocksize\">0x%x</property>\n" \
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"</memory>\n", \
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p->base, p->size, blocksize);
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ram_start = p->base + p->size;
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}
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if (ram_start != 0)
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xml_printf(&retval, &xml, &pos, &size,
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"<memory type=\"ram\" start=\"0x%x\" "
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"length=\"0x%x\"/>\n",
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ram_start, 0-ram_start);
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/* ELSE a flash chip could be at the very end of the 32 bit address
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* space, in which case ram_start will be precisely 0
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*/
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free(banks);
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banks = NULL;
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xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
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if (retval != ERROR_OK) {
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gdb_send_error(connection, retval);
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return retval;
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}
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if (offset + length > pos)
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length = pos - offset;
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char *t = malloc(length + 1);
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t[0] = 'l';
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memcpy(t + 1, xml + offset, length);
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gdb_put_packet(connection, t, length + 1);
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free(t);
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free(xml);
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return ERROR_OK;
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}
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static int gdb_query_packet(struct connection *connection,
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struct target *target, char *packet, int packet_size)
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{
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@ -1747,112 +1859,9 @@ static int gdb_query_packet(struct connection *connection,
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return ERROR_OK;
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}
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else if (strstr(packet, "qXfer:memory-map:read::") && (flash_get_bank_count() > 0))
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{
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/* We get away with only specifying flash here. Regions that are not
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* specified are treated as if we provided no memory map(if not we
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* could detect the holes and mark them as RAM).
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* Normally we only execute this code once, but no big deal if we
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* have to regenerate it a couple of times. */
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struct flash_bank *p;
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char *xml = NULL;
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int size = 0;
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int pos = 0;
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int retval = ERROR_OK;
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int offset;
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int length;
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char *separator;
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int blocksize;
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/* skip command character */
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packet += 23;
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offset = strtoul(packet, &separator, 16);
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length = strtoul(separator + 1, &separator, 16);
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xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
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/*
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sort banks in ascending order, we need to make non-flash memory be ram(or rather
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read/write) by default for GDB.
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GDB does not have a concept of non-cacheable read/write memory.
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*/
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struct flash_bank **banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count());
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int i;
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for (i = 0; i < flash_get_bank_count(); i++)
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{
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p = get_flash_bank_by_num(i);
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if (p == NULL)
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{
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free(banks);
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retval = ERROR_FAIL;
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gdb_send_error(connection, retval);
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return retval;
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}
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banks[i]=p;
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}
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qsort(banks, flash_get_bank_count(), sizeof(struct flash_bank *), compare_bank);
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uint32_t ram_start = 0;
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for (i = 0; i < flash_get_bank_count(); i++)
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{
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p = banks[i];
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if (ram_start < p->base)
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{
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xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
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ram_start, p->base-ram_start);
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}
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/* if device has uneven sector sizes, eg. str7, lpc
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* we pass the smallest sector size to gdb memory map */
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blocksize = gdb_calc_blocksize(p);
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xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
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"<property name=\"blocksize\">0x%x</property>\n" \
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"</memory>\n", \
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p->base, p->size, blocksize);
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ram_start = p->base + p->size;
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}
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if (ram_start != 0)
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{
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xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
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ram_start, 0-ram_start);
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} else
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{
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/* a flash chip could be at the very end of the 32 bit address space, in which case
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ram_start will be precisely 0 */
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}
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free(banks);
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banks = NULL;
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xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
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if (retval != ERROR_OK)
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{
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gdb_send_error(connection, retval);
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return retval;
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}
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if (offset + length > pos)
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{
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length = pos - offset;
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}
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char *t = malloc(length + 1);
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t[0] = 'l';
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memcpy(t + 1, xml + offset, length);
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gdb_put_packet(connection, t, length + 1);
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free(t);
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free(xml);
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return ERROR_OK;
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}
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else if (strstr(packet, "qXfer:memory-map:read::")
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&& (flash_get_bank_count() > 0))
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return gdb_memory_map(connection, target, packet, packet_size);
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else if (strstr(packet, "qXfer:features:read:"))
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{
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char *xml = NULL;
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