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gdb_server, rtos: Fine-grained RTOS register access

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1. Add get_thread_reg() to rtos. It's used in rtos_get_gdb_reg() to read
the value of a single register, instead of reading all register values
by calling get_thread_reg_list().
2. Add set_reg() to rtos. gdb_server uses this to change a single
register value for a specific thread.
3. Add target_get_gdb_reg_list_noread() so it's possible for gdb to get
a list of registers without attempting to read their contents.

The clang static checker doesn't find any new problems with this change.

Change-Id: I77f792d1238cb015b91527ca8cb99593ccc8870e
Signed-off-by: Tim Newsome <tim@sifive.com>
Reviewed-on: http://openocd.zylin.com/5114
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
This commit is contained in:
Tim Newsome
2019-04-08 16:42:48 -07:00
committed by Andreas Fritiofson
parent 16496488d1
commit 0819541366
8 changed files with 158 additions and 50 deletions
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24
src/target/target.c
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@@ -1215,7 +1215,24 @@ int target_get_gdb_reg_list(struct target *target,
struct reg **reg_list[], int *reg_list_size,
enum target_register_class reg_class)
{
return target->type->get_gdb_reg_list(target, reg_list, reg_list_size, reg_class);
int result = target->type->get_gdb_reg_list(target, reg_list,
reg_list_size, reg_class);
if (result != ERROR_OK) {
*reg_list = NULL;
*reg_list_size = 0;
}
return result;
}
int target_get_gdb_reg_list_noread(struct target *target,
struct reg **reg_list[], int *reg_list_size,
enum target_register_class reg_class)
{
if (target->type->get_gdb_reg_list_noread &&
target->type->get_gdb_reg_list_noread(target, reg_list,
reg_list_size, reg_class) == ERROR_OK)
return ERROR_OK;
return target_get_gdb_reg_list(target, reg_list, reg_list_size, reg_class);
}
bool target_supports_gdb_connection(struct target *target)
@@ -1587,8 +1604,9 @@ int target_call_event_callbacks(struct target *target, enum target_event event)
target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
}
LOG_DEBUG("target event %i (%s)", event,
Jim_Nvp_value2name_simple(nvp_target_event, event)->name);
LOG_DEBUG("target event %i (%s) for core %s", event,
Jim_Nvp_value2name_simple(nvp_target_event, event)->name,
target_name(target));
target_handle_event(target, event);