Merge tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu into staging

testing, gdbstub, plugin and gitdm updates

  - cleanup scripts/ci/setup in advance of ppc64 runner
  - ensure detected gdb reported to TCG tests
  - update hexagon container with build deps
  - move alpine container to tagged release
  - fix overflow during qos-test test tree iteration
  - allow bios blobs to be built with test cross compilers
  - introduce monitor_puts for plain strings
  - share disas code between monitor and plugins
  - fix bug in execlog plugin
  - add more tcg plugin documentation, reorg
  - fix link to semihosting spec
  - re-factor gdbstub to use AccelClass/Ops
  - many gitdm updates
  - fix race with plugin mutex lock and linux-user fork()

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* tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu: (52 commits)
  plugins: add [pre|post]fork helpers to linux-user
  contrib/gitdm: add Université Grenoble Alpes
  contrib/gitdm: add Simon to individual contributors
  contrib/gitdm: add China Telecom to the domain map
  contrib/gitdm: add ISCAS to the academics group
  contrib/gitdm: add WANG Xuerui to individual contributers
  contrib/gitdm: add Paul to individual contributors
  contrib/gitdm: add mapping for Loongson Technology
  accel/kvm: move kvm_update_guest_debug to inline stub
  gdbstub: move guest debug support check to ops
  gdbstub: move breakpoint logic to accel ops
  gdbstub: move sstep flags probing into AccelClass
  gdbstub: move into its own sub directory
  semihosting: update link to spec
  docs/devel: document the test plugins
  contrib/plugins: reset skip when matching in execlog
  docs/devel: move API to end of tcg-plugins.rst
  docs/devel: clean-up qemu invocations in tcg-plugins
  plugins: Assert mmu_idx in range before use in qemu_plugin_get_hwaddr
  plugins: extend execlog to filter matches
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/gdbstub/user.c b/gdbstub/user.c
new file mode 100644
index 0000000000..033e5fdd71
--- /dev/null
+++ b/gdbstub/user.c
@@ -0,0 +1,68 @@
+/*
+ * gdbstub user-mode helper routines.
+ *
+ * We know for user-mode we are using TCG so we can call stuff directly.
+ *
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "exec/hwaddr.h"
+#include "exec/gdbstub.h"
+#include "hw/core/cpu.h"
+#include "internals.h"
+
+bool gdb_supports_guest_debug(void)
+{
+    /* user-mode == TCG == supported */
+    return true;
+}
+
+int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len)
+{
+    CPUState *cpu;
+    int err = 0;
+
+    switch (type) {
+    case GDB_BREAKPOINT_SW:
+    case GDB_BREAKPOINT_HW:
+        CPU_FOREACH(cpu) {
+            err = cpu_breakpoint_insert(cpu, addr, BP_GDB, NULL);
+            if (err) {
+                break;
+            }
+        }
+        return err;
+    default:
+        /* user-mode doesn't support watchpoints */
+        return -ENOSYS;
+    }
+}
+
+int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len)
+{
+    CPUState *cpu;
+    int err = 0;
+
+    switch (type) {
+    case GDB_BREAKPOINT_SW:
+    case GDB_BREAKPOINT_HW:
+        CPU_FOREACH(cpu) {
+            err = cpu_breakpoint_remove(cpu, addr, BP_GDB);
+            if (err) {
+                break;
+            }
+        }
+        return err;
+    default:
+        /* user-mode doesn't support watchpoints */
+        return -ENOSYS;
+    }
+}
+
+void gdb_breakpoint_remove_all(CPUState *cs)
+{
+    cpu_breakpoint_remove_all(cs, BP_GDB);
+}