[PULL 1/3] ppc64: Avoid pt_regs struct definition

[Cédric Le Goater]

From: Khem Raj <raj.khem@gmail.com>

Remove pt_regs indirection and instead reference gp_regs directly, this
makes it portable across musl/glibc

Use PT_* constants defined in asm/ptrace.h

Move the file to ppc64 subdir and leave ppc empty

Fixes
../qemu-6.2.0/linux-user/host/ppc64/../ppc/host-signal.h:16:32: error: 
incomplete definition of type 'struct pt_regs'
    return uc->uc_mcontext.regs->nip;
           ~~~~~~~~~~~~~~~~~~~~^

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220315015740.847370-1-raj.khem@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 linux-user/include/host/ppc/host-signal.h   | 38 -------------------
 linux-user/include/host/ppc64/host-signal.h | 42 ++++++++++++++++++++-
 2 files changed, 41 insertions(+), 39 deletions(-)
 delete mode 100644 linux-user/include/host/ppc/host-signal.h

diff --git a/linux-user/include/host/ppc/host-signal.h 
b/linux-user/include/host/ppc/host-signal.h
deleted file mode 100644
index b80384d1356d..000000000000
--- a/linux-user/include/host/ppc/host-signal.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * host-signal.h: signal info dependent on the host architecture
- *
- * Copyright (c) 2003-2005 Fabrice Bellard
- * Copyright (c) 2021 Linaro Limited
- *
- * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
- * See the COPYING file in the top-level directory.
- */
-
-#ifndef PPC_HOST_SIGNAL_H
-#define PPC_HOST_SIGNAL_H
-
-/* The third argument to a SA_SIGINFO handler is ucontext_t. */
-typedef ucontext_t host_sigcontext;
-
-static inline uintptr_t host_signal_pc(host_sigcontext *uc)
-{
-    return uc->uc_mcontext.regs->nip;
-}
-
-static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
-{
-    uc->uc_mcontext.regs->nip = pc;
-}
-
-static inline void *host_signal_mask(host_sigcontext *uc)
-{
-    return &uc->uc_sigmask;
-}
-
-static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
-{
-    return uc->uc_mcontext.regs->trap != 0x400
-        && (uc->uc_mcontext.regs->dsisr & 0x02000000);
-}
-
-#endif
diff --git a/linux-user/include/host/ppc64/host-signal.h 
b/linux-user/include/host/ppc64/host-signal.h
index a353c22a908c..c4ea86647291 100644
--- a/linux-user/include/host/ppc64/host-signal.h
+++ b/linux-user/include/host/ppc64/host-signal.h
@@ -1 +1,41 @@
-#include "../ppc/host-signal.h"
+/*
+ * host-signal.h: signal info dependent on the host architecture
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2021 Linaro Limited
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef PPC_HOST_SIGNAL_H
+#define PPC_HOST_SIGNAL_H
+
+/* Needed for PT_* constants */
+#include <asm/ptrace.h>
+
+/* The third argument to a SA_SIGINFO handler is ucontext_t. */
+typedef ucontext_t host_sigcontext;
+
+static inline uintptr_t host_signal_pc(host_sigcontext *uc)
+{
+    return uc->uc_mcontext.gp_regs[PT_NIP];
+}
+
+static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
+{
+    uc->uc_mcontext.gp_regs[PT_NIP] = pc;
+}
+
+static inline void *host_signal_mask(host_sigcontext *uc)
+{
+    return &uc->uc_sigmask;
+}
+
+static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
+{
+    return uc->uc_mcontext.gp_regs[PT_TRAP] != 0x400
+        && (uc->uc_mcontext.gp_regs[PT_DSISR] & 0x02000000);
+}
+
+#endif
-- 
2.34.1