X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Ftests%2Flibqtest.c;fp=qemu%2Ftests%2Flibqtest.c;h=e5188e0327a2b9c7d1d3ebc4ecd930a1f66e5523;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/tests/libqtest.c b/qemu/tests/libqtest.c
new file mode 100644
index 000000000..e5188e032
--- /dev/null
+++ b/qemu/tests/libqtest.c
@@ -0,0 +1,825 @@
+/*
+ * QTest
+ *
+ * Copyright IBM, Corp. 2012
+ * Copyright Red Hat, Inc. 2012
+ * Copyright SUSE LINUX Products GmbH 2013
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *  Paolo Bonzini     <pbonzini@redhat.com>
+ *  Andreas Färber    <afaerber@suse.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#include "libqtest.h"
+
+#include <glib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/un.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "qemu/compiler.h"
+#include "qemu/osdep.h"
+#include "qapi/qmp/json-parser.h"
+#include "qapi/qmp/json-streamer.h"
+#include "qapi/qmp/qjson.h"
+
+#define MAX_IRQ 256
+#define SOCKET_TIMEOUT 5
+
+QTestState *global_qtest;
+
+struct QTestState
+{
+    int fd;
+    int qmp_fd;
+    bool irq_level[MAX_IRQ];
+    GString *rx;
+    pid_t qemu_pid;  /* our child QEMU process */
+    struct sigaction sigact_old; /* restored on exit */
+};
+
+static GList *qtest_instances;
+static struct sigaction sigact_old;
+
+#define g_assert_no_errno(ret) do { \
+    g_assert_cmpint(ret, !=, -1); \
+} while (0)
+
+static int init_socket(const char *socket_path)
+{
+    struct sockaddr_un addr;
+    int sock;
+    int ret;
+
+    sock = socket(PF_UNIX, SOCK_STREAM, 0);
+    g_assert_no_errno(sock);
+
+    addr.sun_family = AF_UNIX;
+    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
+    qemu_set_cloexec(sock);
+
+    do {
+        ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
+    } while (ret == -1 && errno == EINTR);
+    g_assert_no_errno(ret);
+    ret = listen(sock, 1);
+    g_assert_no_errno(ret);
+
+    return sock;
+}
+
+static int socket_accept(int sock)
+{
+    struct sockaddr_un addr;
+    socklen_t addrlen;
+    int ret;
+    struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
+                               .tv_usec = 0 };
+
+    setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
+               sizeof(timeout));
+
+    do {
+        addrlen = sizeof(addr);
+        ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
+    } while (ret == -1 && errno == EINTR);
+    if (ret == -1) {
+        fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
+    }
+    close(sock);
+
+    return ret;
+}
+
+static void kill_qemu(QTestState *s)
+{
+    if (s->qemu_pid != -1) {
+        kill(s->qemu_pid, SIGTERM);
+        waitpid(s->qemu_pid, NULL, 0);
+    }
+}
+
+static void sigabrt_handler(int signo)
+{
+    GList *elem;
+    for (elem = qtest_instances; elem; elem = elem->next) {
+        kill_qemu(elem->data);
+    }
+}
+
+static void setup_sigabrt_handler(void)
+{
+    struct sigaction sigact;
+
+    /* Catch SIGABRT to clean up on g_assert() failure */
+    sigact = (struct sigaction){
+        .sa_handler = sigabrt_handler,
+        .sa_flags = SA_RESETHAND,
+    };
+    sigemptyset(&sigact.sa_mask);
+    sigaction(SIGABRT, &sigact, &sigact_old);
+}
+
+static void cleanup_sigabrt_handler(void)
+{
+    sigaction(SIGABRT, &sigact_old, NULL);
+}
+
+QTestState *qtest_init(const char *extra_args)
+{
+    QTestState *s;
+    int sock, qmpsock, i;
+    gchar *socket_path;
+    gchar *qmp_socket_path;
+    gchar *command;
+    const char *qemu_binary;
+
+    qemu_binary = getenv("QTEST_QEMU_BINARY");
+    g_assert(qemu_binary != NULL);
+
+    s = g_malloc(sizeof(*s));
+
+    socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
+    qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
+
+    sock = init_socket(socket_path);
+    qmpsock = init_socket(qmp_socket_path);
+
+    /* Only install SIGABRT handler once */
+    if (!qtest_instances) {
+        setup_sigabrt_handler();
+    }
+
+    qtest_instances = g_list_prepend(qtest_instances, s);
+
+    s->qemu_pid = fork();
+    if (s->qemu_pid == 0) {
+        setenv("QEMU_AUDIO_DRV", "none", true);
+        command = g_strdup_printf("exec %s "
+                                  "-qtest unix:%s,nowait "
+                                  "-qtest-log %s "
+                                  "-qmp unix:%s,nowait "
+                                  "-machine accel=qtest "
+                                  "-display none "
+                                  "%s", qemu_binary, socket_path,
+                                  getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
+                                  qmp_socket_path,
+                                  extra_args ?: "");
+        execlp("/bin/sh", "sh", "-c", command, NULL);
+        exit(1);
+    }
+
+    s->fd = socket_accept(sock);
+    if (s->fd >= 0) {
+        s->qmp_fd = socket_accept(qmpsock);
+    }
+    unlink(socket_path);
+    unlink(qmp_socket_path);
+    g_free(socket_path);
+    g_free(qmp_socket_path);
+
+    g_assert(s->fd >= 0 && s->qmp_fd >= 0);
+
+    s->rx = g_string_new("");
+    for (i = 0; i < MAX_IRQ; i++) {
+        s->irq_level[i] = false;
+    }
+
+    /* Read the QMP greeting and then do the handshake */
+    qtest_qmp_discard_response(s, "");
+    qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");
+
+    if (getenv("QTEST_STOP")) {
+        kill(s->qemu_pid, SIGSTOP);
+    }
+
+    return s;
+}
+
+void qtest_quit(QTestState *s)
+{
+    /* Uninstall SIGABRT handler on last instance */
+    if (qtest_instances && !qtest_instances->next) {
+        cleanup_sigabrt_handler();
+    }
+
+    qtest_instances = g_list_remove(qtest_instances, s);
+
+    kill_qemu(s);
+    close(s->fd);
+    close(s->qmp_fd);
+    g_string_free(s->rx, true);
+    g_free(s);
+}
+
+static void socket_send(int fd, const char *buf, size_t size)
+{
+    size_t offset;
+
+    offset = 0;
+    while (offset < size) {
+        ssize_t len;
+
+        len = write(fd, buf + offset, size - offset);
+        if (len == -1 && errno == EINTR) {
+            continue;
+        }
+
+        g_assert_no_errno(len);
+        g_assert_cmpint(len, >, 0);
+
+        offset += len;
+    }
+}
+
+static void socket_sendf(int fd, const char *fmt, va_list ap)
+{
+    gchar *str = g_strdup_vprintf(fmt, ap);
+    size_t size = strlen(str);
+
+    socket_send(fd, str, size);
+    g_free(str);
+}
+
+static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    socket_sendf(s->fd, fmt, ap);
+    va_end(ap);
+}
+
+static GString *qtest_recv_line(QTestState *s)
+{
+    GString *line;
+    size_t offset;
+    char *eol;
+
+    while ((eol = strchr(s->rx->str, '\n')) == NULL) {
+        ssize_t len;
+        char buffer[1024];
+
+        len = read(s->fd, buffer, sizeof(buffer));
+        if (len == -1 && errno == EINTR) {
+            continue;
+        }
+
+        if (len == -1 || len == 0) {
+            fprintf(stderr, "Broken pipe\n");
+            exit(1);
+        }
+
+        g_string_append_len(s->rx, buffer, len);
+    }
+
+    offset = eol - s->rx->str;
+    line = g_string_new_len(s->rx->str, offset);
+    g_string_erase(s->rx, 0, offset + 1);
+
+    return line;
+}
+
+static gchar **qtest_rsp(QTestState *s, int expected_args)
+{
+    GString *line;
+    gchar **words;
+    int i;
+
+redo:
+    line = qtest_recv_line(s);
+    words = g_strsplit(line->str, " ", 0);
+    g_string_free(line, TRUE);
+
+    if (strcmp(words[0], "IRQ") == 0) {
+        int irq;
+
+        g_assert(words[1] != NULL);
+        g_assert(words[2] != NULL);
+
+        irq = strtoul(words[2], NULL, 0);
+        g_assert_cmpint(irq, >=, 0);
+        g_assert_cmpint(irq, <, MAX_IRQ);
+
+        if (strcmp(words[1], "raise") == 0) {
+            s->irq_level[irq] = true;
+        } else {
+            s->irq_level[irq] = false;
+        }
+
+        g_strfreev(words);
+        goto redo;
+    }
+
+    g_assert(words[0] != NULL);
+    g_assert_cmpstr(words[0], ==, "OK");
+
+    if (expected_args) {
+        for (i = 0; i < expected_args; i++) {
+            g_assert(words[i] != NULL);
+        }
+    } else {
+        g_strfreev(words);
+    }
+
+    return words;
+}
+
+typedef struct {
+    JSONMessageParser parser;
+    QDict *response;
+} QMPResponseParser;
+
+static void qmp_response(JSONMessageParser *parser, QList *tokens)
+{
+    QMPResponseParser *qmp = container_of(parser, QMPResponseParser, parser);
+    QObject *obj;
+
+    obj = json_parser_parse(tokens, NULL);
+    if (!obj) {
+        fprintf(stderr, "QMP JSON response parsing failed\n");
+        exit(1);
+    }
+
+    g_assert(qobject_type(obj) == QTYPE_QDICT);
+    g_assert(!qmp->response);
+    qmp->response = (QDict *)obj;
+}
+
+QDict *qtest_qmp_receive(QTestState *s)
+{
+    QMPResponseParser qmp;
+    bool log = getenv("QTEST_LOG") != NULL;
+
+    qmp.response = NULL;
+    json_message_parser_init(&qmp.parser, qmp_response);
+    while (!qmp.response) {
+        ssize_t len;
+        char c;
+
+        len = read(s->qmp_fd, &c, 1);
+        if (len == -1 && errno == EINTR) {
+            continue;
+        }
+
+        if (len == -1 || len == 0) {
+            fprintf(stderr, "Broken pipe\n");
+            exit(1);
+        }
+
+        if (log) {
+            len = write(2, &c, 1);
+        }
+        json_message_parser_feed(&qmp.parser, &c, 1);
+    }
+    json_message_parser_destroy(&qmp.parser);
+
+    return qmp.response;
+}
+
+/**
+ * Allow users to send a message without waiting for the reply,
+ * in the case that they choose to discard all replies up until
+ * a particular EVENT is received.
+ */
+void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
+{
+    va_list ap_copy;
+    QObject *qobj;
+
+    /* Going through qobject ensures we escape strings properly.
+     * This seemingly unnecessary copy is required in case va_list
+     * is an array type.
+     */
+    va_copy(ap_copy, ap);
+    qobj = qobject_from_jsonv(fmt, &ap_copy);
+    va_end(ap_copy);
+
+    /* No need to send anything for an empty QObject.  */
+    if (qobj) {
+        int log = getenv("QTEST_LOG") != NULL;
+        QString *qstr = qobject_to_json(qobj);
+        const char *str = qstring_get_str(qstr);
+        size_t size = qstring_get_length(qstr);
+
+        if (log) {
+            fprintf(stderr, "%s", str);
+        }
+        /* Send QMP request */
+        socket_send(s->qmp_fd, str, size);
+
+        QDECREF(qstr);
+        qobject_decref(qobj);
+    }
+}
+
+QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
+{
+    qtest_async_qmpv(s, fmt, ap);
+
+    /* Receive reply */
+    return qtest_qmp_receive(s);
+}
+
+QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
+{
+    va_list ap;
+    QDict *response;
+
+    va_start(ap, fmt);
+    response = qtest_qmpv(s, fmt, ap);
+    va_end(ap);
+    return response;
+}
+
+void qtest_async_qmp(QTestState *s, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    qtest_async_qmpv(s, fmt, ap);
+    va_end(ap);
+}
+
+void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
+{
+    QDict *response = qtest_qmpv(s, fmt, ap);
+    QDECREF(response);
+}
+
+void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
+{
+    va_list ap;
+    QDict *response;
+
+    va_start(ap, fmt);
+    response = qtest_qmpv(s, fmt, ap);
+    va_end(ap);
+    QDECREF(response);
+}
+
+void qtest_qmp_eventwait(QTestState *s, const char *event)
+{
+    QDict *response;
+
+    for (;;) {
+        response = qtest_qmp_receive(s);
+        if ((qdict_haskey(response, "event")) &&
+            (strcmp(qdict_get_str(response, "event"), event) == 0)) {
+            QDECREF(response);
+            break;
+        }
+        QDECREF(response);
+    }
+}
+
+
+const char *qtest_get_arch(void)
+{
+    const char *qemu = getenv("QTEST_QEMU_BINARY");
+    g_assert(qemu != NULL);
+    const char *end = strrchr(qemu, '/');
+
+    return end + strlen("/qemu-system-");
+}
+
+bool qtest_get_irq(QTestState *s, int num)
+{
+    /* dummy operation in order to make sure irq is up to date */
+    qtest_inb(s, 0);
+
+    return s->irq_level[num];
+}
+
+static int64_t qtest_clock_rsp(QTestState *s)
+{
+    gchar **words;
+    int64_t clock;
+    words = qtest_rsp(s, 2);
+    clock = g_ascii_strtoll(words[1], NULL, 0);
+    g_strfreev(words);
+    return clock;
+}
+
+int64_t qtest_clock_step_next(QTestState *s)
+{
+    qtest_sendf(s, "clock_step\n");
+    return qtest_clock_rsp(s);
+}
+
+int64_t qtest_clock_step(QTestState *s, int64_t step)
+{
+    qtest_sendf(s, "clock_step %"PRIi64"\n", step);
+    return qtest_clock_rsp(s);
+}
+
+int64_t qtest_clock_set(QTestState *s, int64_t val)
+{
+    qtest_sendf(s, "clock_set %"PRIi64"\n", val);
+    return qtest_clock_rsp(s);
+}
+
+void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
+{
+    qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
+    qtest_rsp(s, 0);
+}
+
+void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
+{
+    qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
+    qtest_rsp(s, 0);
+}
+
+static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
+{
+    qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
+    qtest_rsp(s, 0);
+}
+
+void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
+{
+    qtest_out(s, "outb", addr, value);
+}
+
+void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
+{
+    qtest_out(s, "outw", addr, value);
+}
+
+void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
+{
+    qtest_out(s, "outl", addr, value);
+}
+
+static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
+{
+    gchar **args;
+    uint32_t value;
+
+    qtest_sendf(s, "%s 0x%x\n", cmd, addr);
+    args = qtest_rsp(s, 2);
+    value = strtoul(args[1], NULL, 0);
+    g_strfreev(args);
+
+    return value;
+}
+
+uint8_t qtest_inb(QTestState *s, uint16_t addr)
+{
+    return qtest_in(s, "inb", addr);
+}
+
+uint16_t qtest_inw(QTestState *s, uint16_t addr)
+{
+    return qtest_in(s, "inw", addr);
+}
+
+uint32_t qtest_inl(QTestState *s, uint16_t addr)
+{
+    return qtest_in(s, "inl", addr);
+}
+
+static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
+                        uint64_t value)
+{
+    qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
+    qtest_rsp(s, 0);
+}
+
+void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
+{
+    qtest_write(s, "writeb", addr, value);
+}
+
+void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
+{
+    qtest_write(s, "writew", addr, value);
+}
+
+void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
+{
+    qtest_write(s, "writel", addr, value);
+}
+
+void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
+{
+    qtest_write(s, "writeq", addr, value);
+}
+
+static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
+{
+    gchar **args;
+    uint64_t value;
+
+    qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
+    args = qtest_rsp(s, 2);
+    value = strtoull(args[1], NULL, 0);
+    g_strfreev(args);
+
+    return value;
+}
+
+uint8_t qtest_readb(QTestState *s, uint64_t addr)
+{
+    return qtest_read(s, "readb", addr);
+}
+
+uint16_t qtest_readw(QTestState *s, uint64_t addr)
+{
+    return qtest_read(s, "readw", addr);
+}
+
+uint32_t qtest_readl(QTestState *s, uint64_t addr)
+{
+    return qtest_read(s, "readl", addr);
+}
+
+uint64_t qtest_readq(QTestState *s, uint64_t addr)
+{
+    return qtest_read(s, "readq", addr);
+}
+
+static int hex2nib(char ch)
+{
+    if (ch >= '0' && ch <= '9') {
+        return ch - '0';
+    } else if (ch >= 'a' && ch <= 'f') {
+        return 10 + (ch - 'a');
+    } else if (ch >= 'A' && ch <= 'F') {
+        return 10 + (ch - 'a');
+    } else {
+        return -1;
+    }
+}
+
+void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
+{
+    uint8_t *ptr = data;
+    gchar **args;
+    size_t i;
+
+    qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
+    args = qtest_rsp(s, 2);
+
+    for (i = 0; i < size; i++) {
+        ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
+        ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
+    }
+
+    g_strfreev(args);
+}
+
+void qtest_add_func(const char *str, void (*fn))
+{
+    gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
+    g_test_add_func(path, fn);
+    g_free(path);
+}
+
+void qtest_add_data_func(const char *str, const void *data, void (*fn))
+{
+    gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
+    g_test_add_data_func(path, data, fn);
+    g_free(path);
+}
+
+void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
+{
+    gchar *bdata;
+
+    bdata = g_base64_encode(data, size);
+    qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
+    socket_send(s->fd, bdata, strlen(bdata));
+    socket_send(s->fd, "\n", 1);
+    qtest_rsp(s, 0);
+    g_free(bdata);
+}
+
+void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
+{
+    gchar **args;
+    size_t len;
+
+    qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
+    args = qtest_rsp(s, 2);
+
+    g_base64_decode_inplace(args[1], &len);
+    if (size != len) {
+        fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
+                size, len);
+        len = MIN(len, size);
+    }
+
+    memcpy(data, args[1], len);
+    g_strfreev(args);
+}
+
+void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
+{
+    const uint8_t *ptr = data;
+    size_t i;
+    char *enc = g_malloc(2 * size + 1);
+
+    for (i = 0; i < size; i++) {
+        sprintf(&enc[i * 2], "%02x", ptr[i]);
+    }
+
+    qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
+    qtest_rsp(s, 0);
+    g_free(enc);
+}
+
+void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
+{
+    qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
+    qtest_rsp(s, 0);
+}
+
+QDict *qmp(const char *fmt, ...)
+{
+    va_list ap;
+    QDict *response;
+
+    va_start(ap, fmt);
+    response = qtest_qmpv(global_qtest, fmt, ap);
+    va_end(ap);
+    return response;
+}
+
+void qmp_async(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    qtest_async_qmpv(global_qtest, fmt, ap);
+    va_end(ap);
+}
+
+void qmp_discard_response(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    qtest_qmpv_discard_response(global_qtest, fmt, ap);
+    va_end(ap);
+}
+
+bool qtest_big_endian(void)
+{
+    const char *arch = qtest_get_arch();
+    int i;
+
+    static const struct {
+        const char *arch;
+        bool big_endian;
+    } endianness[] = {
+        { "aarch64", false },
+        { "alpha", false },
+        { "arm", false },
+        { "cris", false },
+        { "i386", false },
+        { "lm32", true },
+        { "m68k", true },
+        { "microblaze", true },
+        { "microblazeel", false },
+        { "mips", true },
+        { "mips64", true },
+        { "mips64el", false },
+        { "mipsel", false },
+        { "moxie", true },
+        { "or32", true },
+        { "ppc", true },
+        { "ppc64", true },
+        { "ppcemb", true },
+        { "s390x", true },
+        { "sh4", false },
+        { "sh4eb", true },
+        { "sparc", true },
+        { "sparc64", true },
+        { "unicore32", false },
+        { "x86_64", false },
+        { "xtensa", false },
+        { "xtensaeb", true },
+        {},
+    };
+
+    for (i = 0; endianness[i].arch; i++) {
+        if (strcmp(endianness[i].arch, arch) == 0) {
+            return endianness[i].big_endian;
+        }
+    }
+
+    return false;
+}