linux-user: Split strace prototypes into strace.h

The functions implemented in strace.c are only used in a few files in
linux-user; split them out of qemu.h and into a new strace.h header
which we include in the places that need it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210908154405.15417-3-peter.maydell@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/qemu.h

@@ -415,24 +415,6 @@ extern long safe_syscall_base(int *pending, long number, ...);
 /* syscall.c */
 int host_to_target_waitstatus(int status);
 
-/* strace.c */
-void print_syscall(void *cpu_env, int num,
-                   abi_long arg1, abi_long arg2, abi_long arg3,
-                   abi_long arg4, abi_long arg5, abi_long arg6);
-void print_syscall_ret(void *cpu_env, int num, abi_long ret,
-                       abi_long arg1, abi_long arg2, abi_long arg3,
-                       abi_long arg4, abi_long arg5, abi_long arg6);
-/**
- * print_taken_signal:
- * @target_signum: target signal being taken
- * @tinfo: target_siginfo_t which will be passed to the guest for the signal
- *
- * Print strace output indicating that this signal is being taken by the guest,
- * in a format similar to:
- * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
- */
-void print_taken_signal(int target_signum, const target_siginfo_t *tinfo);
-
 /* signal.c */
 void process_pending_signals(CPUArchState *cpu_env);
 void signal_init(void);

linux-user/signal.c

@@ -22,6 +22,7 @@
 #include <sys/resource.h>
 
 #include "qemu.h"
+#include "strace.h"
 #include "trace.h"
 #include "signal-common.h"
 

linux-user/strace.c

@@ -1,4 +1,5 @@
 #include "qemu/osdep.h"
+
 #include <sys/ipc.h>
 #include <sys/msg.h>
 #include <sys/sem.h>
@@ -14,6 +15,7 @@
 #include <linux/netlink.h>
 #include <sched.h>
 #include "qemu.h"
+#include "strace.h"
 
 struct syscallname {
     int nr;

linux-user/strace.h

@@ -0,0 +1,38 @@
+/*
+ * strace.h: prototypes for linux-user builtin strace handling
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LINUX_USER_STRACE_H
+#define LINUX_USER_STRACE_H
+
+void print_syscall(void *cpu_env, int num,
+                   abi_long arg1, abi_long arg2, abi_long arg3,
+                   abi_long arg4, abi_long arg5, abi_long arg6);
+void print_syscall_ret(void *cpu_env, int num, abi_long ret,
+                       abi_long arg1, abi_long arg2, abi_long arg3,
+                       abi_long arg4, abi_long arg5, abi_long arg6);
+/**
+ * print_taken_signal:
+ * @target_signum: target signal being taken
+ * @tinfo: target_siginfo_t which will be passed to the guest for the signal
+ *
+ * Print strace output indicating that this signal is being taken by the guest,
+ * in a format similar to:
+ * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
+ */
+void print_taken_signal(int target_signum, const target_siginfo_t *tinfo);
+
+#endif /* LINUX_USER_STRACE_H */

linux-user/syscall.c

@@ -127,6 +127,7 @@
 #include "uname.h"
 
 #include "qemu.h"
+#include "strace.h"
 #include "qemu/guest-random.h"
 #include "qemu/selfmap.h"
 #include "user/syscall-trace.h"