cpu: Move breakpoint helpers to common code

This code is not target-specific.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221130135241.85060-4-philmd@linaro.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/cpus-common.c b/cpus-common.c
index 39f355de98..b0047e456f 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -23,6 +23,7 @@
 #include "hw/core/cpu.h"
 #include "sysemu/cpus.h"
 #include "qemu/lockable.h"
+#include "trace/trace-root.h"
 
 static QemuMutex qemu_cpu_list_lock;
 static QemuCond exclusive_cond;
@@ -368,3 +369,74 @@ void process_queued_cpu_work(CPUState *cpu)
     qemu_mutex_unlock(&cpu->work_mutex);
     qemu_cond_broadcast(&qemu_work_cond);
 }
+
+/* Add a breakpoint.  */
+int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
+                          CPUBreakpoint **breakpoint)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+    CPUBreakpoint *bp;
+
+    if (cc->gdb_adjust_breakpoint) {
+        pc = cc->gdb_adjust_breakpoint(cpu, pc);
+    }
+
+    bp = g_malloc(sizeof(*bp));
+
+    bp->pc = pc;
+    bp->flags = flags;
+
+    /* keep all GDB-injected breakpoints in front */
+    if (flags & BP_GDB) {
+        QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry);
+    } else {
+        QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry);
+    }
+
+    if (breakpoint) {
+        *breakpoint = bp;
+    }
+
+    trace_breakpoint_insert(cpu->cpu_index, pc, flags);
+    return 0;
+}
+
+/* Remove a specific breakpoint.  */
+int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+    CPUBreakpoint *bp;
+
+    if (cc->gdb_adjust_breakpoint) {
+        pc = cc->gdb_adjust_breakpoint(cpu, pc);
+    }
+
+    QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
+        if (bp->pc == pc && bp->flags == flags) {
+            cpu_breakpoint_remove_by_ref(cpu, bp);
+            return 0;
+        }
+    }
+    return -ENOENT;
+}
+
+/* Remove a specific breakpoint by reference.  */
+void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *bp)
+{
+    QTAILQ_REMOVE(&cpu->breakpoints, bp, entry);
+
+    trace_breakpoint_remove(cpu->cpu_index, bp->pc, bp->flags);
+    g_free(bp);
+}
+
+/* Remove all matching breakpoints. */
+void cpu_breakpoint_remove_all(CPUState *cpu, int mask)
+{
+    CPUBreakpoint *bp, *next;
+
+    QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) {
+        if (bp->flags & mask) {
+            cpu_breakpoint_remove_by_ref(cpu, bp);
+        }
+    }
+}