print_taken_signal() prints signals when we're tracing signals.
Signed-off-by: Stacey Son
Signed-off-by: Kyle Evans
Signed-off-by: Warner Losh
---
bsd-user/qemu.h | 10 +
bsd-user/strace.c | 97 +++
2 files changed, 107 insertions(+)
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index e5e97632c82..7c54a933eb8 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -202,6 +202,16 @@ print_openbsd_syscall(int num,
abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6);
void print_openbsd_syscall_ret(int num, abi_long ret);
+/**
+ * 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);
extern int do_strace;
/* signal.c */
diff --git a/bsd-user/strace.c b/bsd-user/strace.c
index be40b8a20cf..a77d10dd6b6 100644
--- a/bsd-user/strace.c
+++ b/bsd-user/strace.c
@@ -31,6 +31,24 @@ int do_strace;
/*
* Utility functions
*/
+static const char *
+get_comma(int last)
+{
+return (last) ? "" : ",";
+}
+
+/*
+ * Prints out raw parameter using given format. Caller needs
+ * to do byte swapping if needed.
+ */
+static void
+print_raw_param(const char *fmt, abi_long param, int last)
+{
+char format[64];
+
+(void)snprintf(format, sizeof(format), "%s%s", fmt, get_comma(last));
+gemu_log(format, param);
+}
static void print_sysctl(const struct syscallname *name, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
@@ -239,3 +257,82 @@ void print_openbsd_syscall_ret(int num, abi_long ret)
print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));
}
+
+static void
+print_signal(abi_ulong arg, int last)
+{
+const char *signal_name = NULL;
+switch (arg) {
+case TARGET_SIGHUP:
+signal_name = "SIGHUP";
+break;
+case TARGET_SIGINT:
+signal_name = "SIGINT";
+break;
+case TARGET_SIGQUIT:
+signal_name = "SIGQUIT";
+break;
+case TARGET_SIGILL:
+signal_name = "SIGILL";
+break;
+case TARGET_SIGABRT:
+signal_name = "SIGABRT";
+break;
+case TARGET_SIGFPE:
+signal_name = "SIGFPE";
+break;
+case TARGET_SIGKILL:
+signal_name = "SIGKILL";
+break;
+case TARGET_SIGSEGV:
+signal_name = "SIGSEGV";
+break;
+case TARGET_SIGPIPE:
+signal_name = "SIGPIPE";
+break;
+case TARGET_SIGALRM:
+signal_name = "SIGALRM";
+break;
+case TARGET_SIGTERM:
+signal_name = "SIGTERM";
+break;
+case TARGET_SIGUSR1:
+signal_name = "SIGUSR1";
+break;
+case TARGET_SIGUSR2:
+signal_name = "SIGUSR2";
+break;
+case TARGET_SIGCHLD:
+signal_name = "SIGCHLD";
+break;
+case TARGET_SIGCONT:
+signal_name = "SIGCONT";
+break;
+case TARGET_SIGSTOP:
+signal_name = "SIGSTOP";
+break;
+case TARGET_SIGTTIN:
+signal_name = "SIGTTIN";
+break;
+case TARGET_SIGTTOU:
+signal_name = "SIGTTOU";
+break;
+}
+if (signal_name == NULL) {
+print_raw_param("%ld", arg, last);
+return;
+}
+gemu_log("%s%s", signal_name, get_comma(last));
+}
+
+void print_taken_signal(int target_signum, const target_siginfo_t *tinfo)
+{
+/*
+ * Print the strace output for a signal being taken:
+ * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
+ */
+gemu_log("%d ", getpid());
+gemu_log("--- ");
+print_signal(target_signum, 1);
+gemu_log(" ---\n");
+}
--
2.33.1