Commit 57e30102 authored by Tim Newsome's avatar Tim Newsome Committed by Matthias Welwarsky
Browse files

gdb_server, target: Add target_address_bits()



Targets can use this to expose how many address bits there are.
gdb_server uses this to send gdb the appropriate upper limit in the
memory-map. (Before this change the upper limit would only be correct
for 32-bit targets.)

Change-Id: Idb0933255ed53951fcfb05e040674bcdf19441e1
Signed-off-by: default avatarTim Newsome <tim@sifive.com>
Reviewed-on: http://openocd.zylin.com/4947


Tested-by: jenkins
Reviewed-by: default avatarPeter Mamonov <pmamonov@gmail.com>
Reviewed-by: default avatarTomas Vanek <vanekt@fbl.cz>
parent 85ba2dc4
......@@ -1921,11 +1921,10 @@ static int gdb_memory_map(struct connection *connection,
if (ram_start != 0)
xml_printf(&retval, &xml, &pos, &size,
"<memory type=\"ram\" start=\"" TARGET_ADDR_FMT "\" "
"length=\"0x%x\"/>\n",
ram_start, 0-ram_start);
/* ELSE a flash chip could be at the very end of the 32 bit address
* space, in which case ram_start will be precisely 0
*/
"length=\"" TARGET_ADDR_FMT "\"/>\n",
ram_start, target_address_max(target) - ram_start + 1);
/* ELSE a flash chip could be at the very end of the address space, in
* which case ram_start will be precisely 0 */
free(banks);
......
......@@ -1560,6 +1560,11 @@ const struct command_registration riscv_command_handlers[] = {
COMMAND_REGISTRATION_DONE
};
unsigned riscv_address_bits(struct target *target)
{
return riscv_xlen(target);
}
struct target_type riscv_target = {
.name = "riscv",
......@@ -1594,7 +1599,9 @@ struct target_type riscv_target = {
.run_algorithm = riscv_run_algorithm,
.commands = riscv_command_handlers
.commands = riscv_command_handlers,
.address_bits = riscv_address_bits
};
/*** RISC-V Interface ***/
......
......@@ -1257,6 +1257,22 @@ int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno,
return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
}
target_addr_t target_address_max(struct target *target)
{
unsigned bits = target_address_bits(target);
if (sizeof(target_addr_t) * 8 == bits)
return (target_addr_t) -1;
else
return (((target_addr_t) 1) << bits) - 1;
}
unsigned target_address_bits(struct target *target)
{
if (target->type->address_bits)
return target->type->address_bits(target);
return 32;
}
int target_profiling(struct target *target, uint32_t *samples,
uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
{
......
......@@ -641,7 +641,17 @@ int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fi
*/
int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c);
/**
* Return the highest accessible address for this target.
*/
target_addr_t target_address_max(struct target *target);
/**
* Return the number of address bits this target supports.
*
* This routine is a wrapper for target->type->address_bits.
*/
unsigned target_address_bits(struct target *target);
/** Return the *name* of this targets current state */
const char *target_state_name(struct target *target);
......
......@@ -284,6 +284,11 @@ struct target_type {
*/
int (*profiling)(struct target *target, uint32_t *samples,
uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
/* Return the number of address bits this target supports. This will
* typically be 32 for 32-bit targets, and 64 for 64-bit targets. If not
* implemented, it's assumed to be 32. */
unsigned (*address_bits)(struct target *target);
};
#endif /* OPENOCD_TARGET_TARGET_TYPE_H */
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