Initial import of qemu-2.4.1HEADmaster

1 files changed, 242 insertions, 0 deletions

diff --git a/bsd-user/strace.c b/bsd-user/strace.c
new file mode 100644
index 00000000..e33dd4d4
--- /dev/null
+++ b/bsd-user/strace.c
@@ -0,0 +1,242 @@
+/*
+ *  System call tracing and debugging
+ *
+ *
+ *  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/>.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/select.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/ioccom.h>
+#include <ctype.h>
+
+#include "qemu.h"
+
+int do_strace;
+
+/*
+ * Utility functions
+ */
+
+static void print_sysctl(const struct syscallname *name, abi_long arg1,
+        abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
+        abi_long arg6)
+{
+    uint32_t i;
+    int32_t *namep;
+
+    gemu_log("%s({ ", name->name);
+    namep = lock_user(VERIFY_READ, arg1, sizeof(int32_t) * arg2, 1);
+    if (namep) {
+        int32_t *p = namep;
+
+        for (i = 0; i < (uint32_t)arg2; i++) {
+            gemu_log("%d ", tswap32(*p++));
+        }
+        unlock_user(namep, arg1, 0);
+    }
+    gemu_log("}, %u, 0x" TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ", 0x"
+        TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ")",
+        (uint32_t)arg2, arg3, arg4, arg5, arg6);
+}
+
+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;
+
+    s = lock_user_string(arg1);
+    if (s == NULL) {
+        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;
+
+        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, arg_addr, 0);
+        }
+    }
+    gemu_log("NULL})");
+}
+
+static void print_ioctl(const struct syscallname *name,
+        abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4,
+        abi_long arg5, abi_long arg6)
+{
+    /* Decode the ioctl request */
+    gemu_log("%s(%d, 0x%0lx { IO%s%s GRP:0x%x('%c') CMD:%d LEN:%d }, 0x"
+            TARGET_ABI_FMT_lx ", ...)",
+            name->name,
+            (int)arg1,
+            (unsigned long)arg2,
+            arg2 & IOC_OUT ? "R" : "",
+            arg2 & IOC_IN ? "W" : "",
+            (unsigned)IOCGROUP(arg2),
+            isprint(IOCGROUP(arg2)) ? (char)IOCGROUP(arg2) : '?',
+            (int)arg2 & 0xFF,
+            (int)IOCPARM_LEN(arg2),
+            arg3);
+}
+
+/*
+ * 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));
+}