Preliminary BSD user emulator support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5544 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 191 insertions, 0 deletions

diff --git a/bsd-user/strace.c b/bsd-user/strace.c
new file mode 100644
index 000000000..0998dc5ba
--- /dev/null
+++ b/bsd-user/strace.c
@@ -0,0 +1,191 @@
+#include <stdio.h>
+#include <errno.h>
+#include <sys/select.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include "qemu.h"
+
+int do_strace=0;
+
+struct syscallname {
+    int nr;
+    const char *name;
+    const char *format;
+    void (*call)(const struct syscallname *,
+                 abi_long, abi_long, abi_long,
+                 abi_long, abi_long, abi_long);
+    void (*result)(const struct syscallname *, abi_long);
+};
+
+/*
+ * Utility functions
+ */
+
+static void
+print_execve(const struct syscallname *name,
+             abi_long arg1, abi_long arg2, abi_long arg3,
+             abi_long arg4, abi_long arg5, abi_long arg6)
+{
+    abi_ulong arg_ptr_addr;
+    char *s;
+
+    if (!(s = lock_user_string(arg1)))
+        return;
+    gemu_log("%s(\"%s\",{", name->name, s);
+    unlock_user(s, arg1, 0);
+
+    for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
+        abi_ulong *arg_ptr, arg_addr, s_addr;
+
+        arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
+        if (!arg_ptr)
+            return;
+        arg_addr = tswapl(*arg_ptr);
+        unlock_user(arg_ptr, arg_ptr_addr, 0);
+        if (!arg_addr)
+            break;
+        if ((s = lock_user_string(arg_addr))) {
+            gemu_log("\"%s\",", s);
+            unlock_user(s, s_addr, 0);
+        }
+    }
+
+    gemu_log("NULL})");
+}
+
+/*
+ * Variants for the return value output function
+ */
+
+static void
+print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
+{
+if( ret == -1 ) {
+        gemu_log(" = -1 errno=%d (%s)\n", errno, strerror(errno));
+    } else {
+        gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
+    }
+}
+
+#if 0 /* currently unused */
+static void
+print_syscall_ret_raw(struct syscallname *name, abi_long ret)
+{
+        gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
+}
+#endif
+
+/*
+ * An array of all of the syscalls we know about
+ */
+
+static const struct syscallname freebsd_scnames[] = {
+#include "freebsd/strace.list"
+};
+static const struct syscallname netbsd_scnames[] = {
+#include "netbsd/strace.list"
+};
+static const struct syscallname openbsd_scnames[] = {
+#include "openbsd/strace.list"
+};
+
+static void
+print_syscall(int num, const struct syscallname *scnames, unsigned int nscnames,
+              abi_long arg1, abi_long arg2, abi_long arg3,
+              abi_long arg4, abi_long arg5, abi_long arg6)
+{
+    unsigned int i;
+    const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
+        TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
+        TARGET_ABI_FMT_ld ")";
+
+    gemu_log("%d ", getpid() );
+
+    for (i = 0; i < nscnames; i++)
+        if (scnames[i].nr == num) {
+            if (scnames[i].call != NULL) {
+                scnames[i].call(&scnames[i], arg1, arg2, arg3, arg4, arg5,
+                                arg6);
+            } else {
+                /* XXX: this format system is broken because it uses
+                   host types and host pointers for strings */
+                if (scnames[i].format != NULL)
+                    format = scnames[i].format;
+                gemu_log(format, scnames[i].name, arg1, arg2, arg3, arg4,
+                         arg5, arg6);
+            }
+            return;
+        }
+    gemu_log("Unknown syscall %d\n", num);
+}
+
+static void
+print_syscall_ret(int num, abi_long ret, const struct syscallname *scnames,
+                  unsigned int nscnames)
+{
+    unsigned int i;
+
+    for (i = 0; i < nscnames; i++)
+        if (scnames[i].nr == num) {
+            if (scnames[i].result != NULL) {
+                scnames[i].result(&scnames[i], ret);
+            } else {
+                if( ret < 0 ) {
+                    gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret,
+                             strerror(-ret));
+                } else {
+                    gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
+                }
+            }
+            break;
+        }
+}
+
+/*
+ * The public interface to this module.
+ */
+void
+print_freebsd_syscall(int num,
+                      abi_long arg1, abi_long arg2, abi_long arg3,
+                      abi_long arg4, abi_long arg5, abi_long arg6)
+{
+    print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames),
+                  arg1, arg2, arg3, arg4, arg5, arg6);
+}
+
+void
+print_freebsd_syscall_ret(int num, abi_long ret)
+{
+    print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames));
+}
+
+void
+print_netbsd_syscall(int num,
+                      abi_long arg1, abi_long arg2, abi_long arg3,
+                      abi_long arg4, abi_long arg5, abi_long arg6)
+{
+    print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames),
+                  arg1, arg2, arg3, arg4, arg5, arg6);
+}
+
+void
+print_netbsd_syscall_ret(int num, abi_long ret)
+{
+    print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames));
+}
+
+void
+print_openbsd_syscall(int num,
+                      abi_long arg1, abi_long arg2, abi_long arg3,
+                      abi_long arg4, abi_long arg5, abi_long arg6)
+{
+    print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames),
+                  arg1, arg2, arg3, arg4, arg5, arg6);
+}
+
+void
+print_openbsd_syscall_ret(int num, abi_long ret)
+{
+    print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));
+}