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cpukit/libdebugger: Add pure swbreak capability

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Add a capability that allows for implementations that operate purely
using software breaks. Due to this implementation method, software
breaks must not be restored until just before returning control to the
thread itself and will be handled by the implementation through thread
switch and interrupt hooks.
This commit is contained in:
Kinsey Moore
2022-02-10 10:03:01 -06:00
committed by Joel Sherrill
parent 924993a4bc
commit ea1a4fd29b
2 changed files with 14 additions and 4 deletions
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14
cpukit/libdebugger/rtems-debugger-target.h
View File

@@ -49,9 +49,17 @@ extern "C" {
/**
* Target capabilities mask.
*/
#define RTEMS_DEBUGGER_TARGET_CAP_SWBREAK (1 << 0)
#define RTEMS_DEBUGGER_TARGET_CAP_HWBREAK (1 << 1)
#define RTEMS_DEBUGGER_TARGET_CAP_HWWATCH (1 << 2)
#define RTEMS_DEBUGGER_TARGET_CAP_SWBREAK (1 << 0)
#define RTEMS_DEBUGGER_TARGET_CAP_HWBREAK (1 << 1)
#define RTEMS_DEBUGGER_TARGET_CAP_HWWATCH (1 << 2)
/*
* This target capability indicates that the target implementation uses a pure
* software break implementation which must not allow breakpoints to be
* inserted before the actual switch to the thread, be it in interrupt context
* or otherwise. Such implementations must necessarily implement a thread
* switch hook and interrupt hooks to handle these situations.
*/
#define RTEMS_DEBUGGER_TARGET_CAP_PURE_SWBREAK (1 << 3)
/**
* Types of hardware breakpoints.

4
cpukit/libdebugger/rtems-debugger-threads.c
View File

@@ -355,9 +355,11 @@ rtems_debugger_thread_system_resume(bool detaching)
current = rtems_debugger_thread_current(threads);
if (current != NULL) {
size_t i;
rtems_debugger_target* target = rtems_debugger->target;
if (rtems_debugger_verbose())
rtems_debugger_printf("rtems-db: sys: : resuming\n");
if (!detaching) {
if (!detaching
&& (target->capabilities & RTEMS_DEBUGGER_TARGET_CAP_PURE_SWBREAK) == 0) {
r = rtems_debugger_target_swbreak_insert();
if (r == 0)
r = rtems_debugger_target_hwbreak_insert();