gwj / at91sam9263 · Files

/*
 * QEMU monitor
 * 
 * Copyright (c) 2003-2004 Fabrice Bellard
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "vl.h"

#include "disas.h"

#include <dirent.h>

//#define DEBUG

//#define DEBUG_COMPLETION

#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif

#define TERM_CMD_BUF_SIZE 4095

#define TERM_MAX_CMDS 64

#define NB_COMPLETIONS_MAX 256

#define IS_NORM 0
#define IS_ESC  1
#define IS_CSI  2

#define printf do_not_use_printf

static char term_cmd_buf[TERM_CMD_BUF_SIZE + 1];
static int term_cmd_buf_index;
static int term_cmd_buf_size;

static char term_last_cmd_buf[TERM_CMD_BUF_SIZE + 1];
static int term_last_cmd_buf_index;
static int term_last_cmd_buf_size;

static int term_esc_state;
static int term_esc_param;

static char *term_history[TERM_MAX_CMDS];
static int term_hist_entry;

static CharDriverState *monitor_hd;

static int nb_completions;
static int completion_index;
static char *completions[NB_COMPLETIONS_MAX];

/*
 * Supported types:
 * 
 * 'F'          filename

 * 'B'          block device name

 * 's'          string (accept optional quote)
 * 'i'          integer
 * '/'          optional gdb-like print format (like "/10x")
 *
 * '?'          optional type (for 'F', 's' and 'i')
 *
 */

typedef struct term_cmd_t {
    const char *name;

    const char *args_type;
    void (*handler)();

    const char *params;
    const char *help;
} term_cmd_t;

static term_cmd_t term_cmds[];
static term_cmd_t info_cmds[];

static void add_completion(const char *str);

void term_printf(const char *fmt, ...)
{

    char buf[4096];

    va_list ap;
    va_start(ap, fmt);

    vsnprintf(buf, sizeof(buf), fmt, ap);
    qemu_chr_write(monitor_hd, buf, strlen(buf));

    va_end(ap);
}

void term_flush(void)
{
}

static int compare_cmd(const char *name, const char *list)
{
    const char *p, *pstart;
    int len;
    len = strlen(name);
    p = list;
    for(;;) {
        pstart = p;
        p = strchr(p, '|');
        if (!p)
            p = pstart + strlen(pstart);
        if ((p - pstart) == len && !memcmp(pstart, name, len))
            return 1;
        if (*p == '\0')
            break;
        p++;
    }
    return 0;
}

static void help_cmd1(term_cmd_t *cmds, const char *prefix, const char *name)
{
    term_cmd_t *cmd;

    for(cmd = cmds; cmd->name != NULL; cmd++) {
        if (!name || !strcmp(name, cmd->name))
            term_printf("%s%s %s -- %s\n", prefix, cmd->name, cmd->params, cmd->help);
    }
}

static void help_cmd(const char *name)
{
    if (name && !strcmp(name, "info")) {
        help_cmd1(info_cmds, "info ", NULL);
    } else {
        help_cmd1(term_cmds, "", name);

        if (name && !strcmp(name, "log")) {
            CPULogItem *item;
            term_printf("Log items (comma separated):\n");
            term_printf("%-10s %s\n", "none", "remove all logs");
            for(item = cpu_log_items; item->mask != 0; item++) {
                term_printf("%-10s %s\n", item->name, item->help);
            }
        }

    }
}

static void do_help(const char *name)

{

    help_cmd(name);

}

static void do_commit(void)

{
    int i;

    for (i = 0; i < MAX_DISKS; i++) {
        if (bs_table[i])
            bdrv_commit(bs_table[i]);
    }
}

static void do_info(const char *item)

{
    term_cmd_t *cmd;

    if (!item)

        goto help;
    for(cmd = info_cmds; cmd->name != NULL; cmd++) {

        if (compare_cmd(item, cmd->name)) 

            goto found;
    }
 help:

    help_cmd("info");

    return;
 found:

    cmd->handler();

}

static void do_info_network(void)

{
    int i, j;
    NetDriverState *nd;

    for(i = 0; i < nb_nics; i++) {
        nd = &nd_table[i];
        term_printf("%d: ifname=%s macaddr=", i, nd->ifname);
        for(j = 0; j < 6; j++) {
            if (j > 0)
                term_printf(":");
            term_printf("%02x", nd->macaddr[j]);
        }
        term_printf("\n");
    }
}

static void do_info_block(void)

{
    bdrv_info();
}

static void do_info_registers(void)
{
#ifdef TARGET_I386
    cpu_dump_state(cpu_single_env, stdout, X86_DUMP_FPU | X86_DUMP_CCOP);
#else
    cpu_dump_state(cpu_single_env, stdout, 0);
#endif
}

static void do_info_history (void)
{
    int i;

    for (i = 0; i < TERM_MAX_CMDS; i++) {
	if (term_history[i] == NULL)
	    break;
	term_printf("%d: '%s'\n", i, term_history[i]);
    }
}

static void do_quit(void)

{
    exit(0);
}

static int eject_device(BlockDriverState *bs, int force)
{
    if (bdrv_is_inserted(bs)) {
        if (!force) {
            if (!bdrv_is_removable(bs)) {
                term_printf("device is not removable\n");
                return -1;
            }
            if (bdrv_is_locked(bs)) {
                term_printf("device is locked\n");
                return -1;
            }
        }
        bdrv_close(bs);
    }
    return 0;
}

static void do_eject(int force, const char *filename)

{
    BlockDriverState *bs;

    bs = bdrv_find(filename);

    if (!bs) {
        term_printf("device not found\n");
        return;
    }
    eject_device(bs, force);
}

static void do_change(const char *device, const char *filename)

{
    BlockDriverState *bs;

    bs = bdrv_find(device);

    if (!bs) {
        term_printf("device not found\n");
        return;
    }
    if (eject_device(bs, 0) < 0)
        return;

    bdrv_open(bs, filename, 0);

}

static void do_screen_dump(const char *filename)

{

    vga_screen_dump(filename);

}

static void do_log(const char *items)

{
    int mask;

    if (!strcmp(items, "none")) {

        mask = 0;
    } else {

        mask = cpu_str_to_log_mask(items);

        if (!mask) {

            help_cmd("log");

            return;
        }
    }
    cpu_set_log(mask);
}

static void do_savevm(const char *filename)

{

    if (qemu_savevm(filename) < 0)
        term_printf("I/O error when saving VM to '%s'\n", filename);

}

static void do_loadvm(const char *filename)

{

    if (qemu_loadvm(filename) < 0) 
        term_printf("I/O error when loading VM from '%s'\n", filename);

}

static void do_stop(void)

{
    vm_stop(EXCP_INTERRUPT);
}

static void do_cont(void)

{
    vm_start();
}

#ifdef CONFIG_GDBSTUB

static void do_gdbserver(int has_port, int port)

{

    if (!has_port)
        port = DEFAULT_GDBSTUB_PORT;

    if (gdbserver_start(port) < 0) {
        qemu_printf("Could not open gdbserver socket on port %d\n", port);
    } else {
        qemu_printf("Waiting gdb connection on port %d\n", port);
    }
}

#endif

static void term_printc(int c)
{
    term_printf("'");
    switch(c) {
    case '\'':
        term_printf("\\'");
        break;
    case '\\':
        term_printf("\\\\");
        break;
    case '\n':
        term_printf("\\n");
        break;
    case '\r':
        term_printf("\\r");
        break;
    default:
        if (c >= 32 && c <= 126) {
            term_printf("%c", c);
        } else {
            term_printf("\\x%02x", c);
        }
        break;
    }
    term_printf("'");
}

static void memory_dump(int count, int format, int wsize, 
                        target_ulong addr, int is_physical)
{
    int nb_per_line, l, line_size, i, max_digits, len;
    uint8_t buf[16];
    uint64_t v;

    if (format == 'i') {
        int flags;
        flags = 0;
#ifdef TARGET_I386

        if (wsize == 2) {

            flags = 1;

        } else if (wsize == 4) {
            flags = 0;
        } else {
            /* as default we use the current CS size */
            flags = 0;
            if (!(cpu_single_env->segs[R_CS].flags & DESC_B_MASK))
                flags = 1;
        }
#endif

        monitor_disas(addr, count, is_physical, flags);
        return;
    }

    len = wsize * count;
    if (wsize == 1)
        line_size = 8;
    else
        line_size = 16;
    nb_per_line = line_size / wsize;
    max_digits = 0;

    switch(format) {
    case 'o':
        max_digits = (wsize * 8 + 2) / 3;
        break;
    default:
    case 'x':
        max_digits = (wsize * 8) / 4;
        break;
    case 'u':
    case 'd':
        max_digits = (wsize * 8 * 10 + 32) / 33;
        break;
    case 'c':
        wsize = 1;
        break;
    }

    while (len > 0) {
        term_printf("0x%08x:", addr);
        l = len;
        if (l > line_size)
            l = line_size;
        if (is_physical) {
            cpu_physical_memory_rw(addr, buf, l, 0);
        } else {
            cpu_memory_rw_debug(cpu_single_env, addr, buf, l, 0);
        }
        i = 0; 
        while (i < l) {
            switch(wsize) {
            default:
            case 1:
                v = ldub_raw(buf + i);
                break;
            case 2:
                v = lduw_raw(buf + i);
                break;
            case 4:
                v = ldl_raw(buf + i);
                break;
            case 8:
                v = ldq_raw(buf + i);
                break;
            }
            term_printf(" ");
            switch(format) {
            case 'o':
                term_printf("%#*llo", max_digits, v);
                break;
            case 'x':
                term_printf("0x%0*llx", max_digits, v);
                break;
            case 'u':
                term_printf("%*llu", max_digits, v);
                break;
            case 'd':
                term_printf("%*lld", max_digits, v);
                break;
            case 'c':
                term_printc(v);
                break;
            }
            i += wsize;
        }
        term_printf("\n");
        addr += l;
        len -= l;
    }
}

static void do_memory_dump(int count, int format, int size, int addr)
{
    memory_dump(count, format, size, addr, 0);
}

static void do_physical_memory_dump(int count, int format, int size, int addr)
{
    memory_dump(count, format, size, addr, 1);
}

static void do_print(int count, int format, int size, int val)
{
    switch(format) {
    case 'o':
        term_printf("%#o", val);
        break;
    case 'x':
        term_printf("%#x", val);
        break;
    case 'u':
        term_printf("%u", val);
        break;
    default:
    case 'd':
        term_printf("%d", val);
        break;
    case 'c':
        term_printc(val);
        break;
    }
    term_printf("\n");
}

typedef struct {
    int keycode;
    const char *name;
} KeyDef;

static const KeyDef key_defs[] = {
    { 0x2a, "shift" },
    { 0x36, "shift_r" },

    { 0x38, "alt" },
    { 0xb8, "alt_r" },
    { 0x1d, "ctrl" },
    { 0x9d, "ctrl_r" },

    { 0xdd, "menu" },

    { 0x01, "esc" },

    { 0x02, "1" },
    { 0x03, "2" },
    { 0x04, "3" },
    { 0x05, "4" },
    { 0x06, "5" },
    { 0x07, "6" },
    { 0x08, "7" },
    { 0x09, "8" },
    { 0x0a, "9" },
    { 0x0b, "0" },
    { 0x0e, "backspace" },

    { 0x0f, "tab" },
    { 0x10, "q" },
    { 0x11, "w" },
    { 0x12, "e" },
    { 0x13, "r" },
    { 0x14, "t" },
    { 0x15, "y" },
    { 0x16, "u" },
    { 0x17, "i" },
    { 0x18, "o" },
    { 0x19, "p" },

    { 0x1c, "ret" },

    { 0x1e, "a" },
    { 0x1f, "s" },
    { 0x20, "d" },
    { 0x21, "f" },
    { 0x22, "g" },
    { 0x23, "h" },
    { 0x24, "j" },
    { 0x25, "k" },
    { 0x26, "l" },

    { 0x2c, "z" },
    { 0x2d, "x" },
    { 0x2e, "c" },
    { 0x2f, "v" },
    { 0x30, "b" },
    { 0x31, "n" },
    { 0x32, "m" },

    { 0x39, "spc" },

    { 0x3a, "caps_lock" },

    { 0x3b, "f1" },
    { 0x3c, "f2" },
    { 0x3d, "f3" },
    { 0x3e, "f4" },
    { 0x3f, "f5" },
    { 0x40, "f6" },
    { 0x41, "f7" },
    { 0x42, "f8" },
    { 0x43, "f9" },
    { 0x44, "f10" },

    { 0x45, "num_lock" },

    { 0x46, "scroll_lock" },

    { 0x56, "<" },

    { 0x57, "f11" },
    { 0x58, "f12" },

    { 0xb7, "print" },

    { 0xc7, "home" },
    { 0xc9, "pgup" },
    { 0xd1, "pgdn" },
    { 0xcf, "end" },

    { 0xcb, "left" },
    { 0xc8, "up" },
    { 0xd0, "down" },
    { 0xcd, "right" },

    { 0xd2, "insert" },
    { 0xd3, "delete" },
    { 0, NULL },
};

static int get_keycode(const char *key)
{
    const KeyDef *p;

    for(p = key_defs; p->name != NULL; p++) {
        if (!strcmp(key, p->name))
            return p->keycode;
    }
    return -1;
}

static void do_send_key(const char *string)
{
    char keybuf[16], *q;
    uint8_t keycodes[16];
    const char *p;
    int nb_keycodes, keycode, i;

    nb_keycodes = 0;
    p = string;
    while (*p != '\0') {
        q = keybuf;
        while (*p != '\0' && *p != '-') {
            if ((q - keybuf) < sizeof(keybuf) - 1) {
                *q++ = *p;
            }
            p++;
        }
        *q = '\0';
        keycode = get_keycode(keybuf);
        if (keycode < 0) {
            term_printf("unknown key: '%s'\n", keybuf);
            return;
        }
        keycodes[nb_keycodes++] = keycode;
        if (*p == '\0')
            break;
        p++;
    }
    /* key down events */
    for(i = 0; i < nb_keycodes; i++) {
        keycode = keycodes[i];
        if (keycode & 0x80)
            kbd_put_keycode(0xe0);
        kbd_put_keycode(keycode & 0x7f);
    }
    /* key up events */
    for(i = nb_keycodes - 1; i >= 0; i--) {
        keycode = keycodes[i];
        if (keycode & 0x80)
            kbd_put_keycode(0xe0);
        kbd_put_keycode(keycode | 0x80);
    }
}

static void do_ioport_read(int count, int format, int size, int addr, int has_index, int index)
{
    uint32_t val;
    int suffix;

    if (has_index) {
        cpu_outb(NULL, addr & 0xffff, index & 0xff);
        addr++;
    }
    addr &= 0xffff;

    switch(size) {
    default:
    case 1:
        val = cpu_inb(NULL, addr);
        suffix = 'b';
        break;
    case 2:
        val = cpu_inw(NULL, addr);
        suffix = 'w';
        break;
    case 4:
        val = cpu_inl(NULL, addr);
        suffix = 'l';
        break;
    }
    term_printf("port%c[0x%04x] = %#0*x\n",
                suffix, addr, size * 2, val);
}

static void do_system_reset(void)
{
    qemu_system_reset_request();
}

static term_cmd_t term_cmds[] = {

    { "help|?", "s?", do_help, 

      "[cmd]", "show the help" },

    { "commit", "", do_commit, 

      "", "commit changes to the disk images (if -snapshot is used)" },

    { "info", "s?", do_info,

      "subcommand", "show various information about the system state" },

    { "q|quit", "", do_quit,

      "", "quit the emulator" },

    { "eject", "-fB", do_eject,

      "[-f] device", "eject a removable media (use -f to force it)" },

    { "change", "BF", do_change,

      "device filename", "change a removable media" },

    { "screendump", "F", do_screen_dump, 

      "filename", "save screen into PPM image 'filename'" },

    { "log", "s", do_log,

      "item1[,...]", "activate logging of the specified items to '/tmp/qemu.log'" }, 

    { "savevm", "F", do_savevm,

      "filename", "save the whole virtual machine state to 'filename'" }, 

    { "loadvm", "F", do_loadvm,

      "filename", "restore the whole virtual machine state from 'filename'" }, 

    { "stop", "", do_stop, 
      "", "stop emulation", },
    { "c|cont", "", do_cont, 
      "", "resume emulation", },

#ifdef CONFIG_GDBSTUB

    { "gdbserver", "i?", do_gdbserver, 
      "[port]", "start gdbserver session (default port=1234)", },

#endif

    { "x", "/i", do_memory_dump, 
      "/fmt addr", "virtual memory dump starting at 'addr'", },
    { "xp", "/i", do_physical_memory_dump, 
      "/fmt addr", "physical memory dump starting at 'addr'", },
    { "p|print", "/i", do_print, 
      "/fmt expr", "print expression value (use $reg for CPU register access)", },

    { "i", "/ii.", do_ioport_read, 
      "/fmt addr", "I/O port read" },

    { "sendkey", "s", do_send_key, 
      "keys", "send keys to the VM (e.g. 'sendkey ctrl-alt-f1')" },

    { "system_reset", "", do_system_reset, 
      "", "reset the system" },

    { NULL, NULL, }, 

};

static term_cmd_t info_cmds[] = {

    { "network", "", do_info_network,

      "", "show the network state" },

    { "block", "", do_info_block,

      "", "show the block devices" },

    { "registers", "", do_info_registers,
      "", "show the cpu registers" },

    { "history", "", do_info_history,
      "", "show the command line history", },

    { "irq", "", irq_info,
      "", "show the interrupts statistics (if available)", },

    { "pic", "", pic_info,
      "", "show i8259 (PIC) state", },

    { "pci", "", pci_info,
      "", "show PCI info", },

    { NULL, NULL, },
};

/*******************************************************************/

static const char *pch;
static jmp_buf expr_env;

typedef struct MonitorDef {
    const char *name;
    int offset;
    int (*get_value)(struct MonitorDef *md);
} MonitorDef;

#if defined(TARGET_I386)
static int monitor_get_pc (struct MonitorDef *md)
{
    return cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base;
}
#endif

#if defined(TARGET_PPC)
static int monitor_get_ccr (struct MonitorDef *md)
{
    unsigned int u;
    int i;

    u = 0;
    for (i = 0; i < 8; i++)
	u |= cpu_single_env->crf[i] << (32 - (4 * i));

    return u;
}

static int monitor_get_msr (struct MonitorDef *md)
{
    return (cpu_single_env->msr[MSR_POW] << MSR_POW) |
        (cpu_single_env->msr[MSR_ILE] << MSR_ILE) |
        (cpu_single_env->msr[MSR_EE] << MSR_EE) |
        (cpu_single_env->msr[MSR_PR] << MSR_PR) |
        (cpu_single_env->msr[MSR_FP] << MSR_FP) |
        (cpu_single_env->msr[MSR_ME] << MSR_ME) |
        (cpu_single_env->msr[MSR_FE0] << MSR_FE0) |
        (cpu_single_env->msr[MSR_SE] << MSR_SE) |
        (cpu_single_env->msr[MSR_BE] << MSR_BE) |
        (cpu_single_env->msr[MSR_FE1] << MSR_FE1) |
        (cpu_single_env->msr[MSR_IP] << MSR_IP) |
        (cpu_single_env->msr[MSR_IR] << MSR_IR) |
        (cpu_single_env->msr[MSR_DR] << MSR_DR) |
        (cpu_single_env->msr[MSR_RI] << MSR_RI) |
        (cpu_single_env->msr[MSR_LE] << MSR_LE);
}

static int monitor_get_xer (struct MonitorDef *md)
{
    return (cpu_single_env->xer[XER_SO] << XER_SO) |
        (cpu_single_env->xer[XER_OV] << XER_OV) |
        (cpu_single_env->xer[XER_CA] << XER_CA) |
        (cpu_single_env->xer[XER_BC] << XER_BC);
}

uint32_t cpu_ppc_load_decr (CPUState *env);
static int monitor_get_decr (struct MonitorDef *md)
{
    return cpu_ppc_load_decr(cpu_single_env);
}

uint32_t cpu_ppc_load_tbu (CPUState *env);
static int monitor_get_tbu (struct MonitorDef *md)
{
    return cpu_ppc_load_tbu(cpu_single_env);
}

uint32_t cpu_ppc_load_tbl (CPUState *env);
static int monitor_get_tbl (struct MonitorDef *md)
{
    return cpu_ppc_load_tbl(cpu_single_env);
}

#endif

static MonitorDef monitor_defs[] = {
#ifdef TARGET_I386

#define SEG(name, seg) \
    { name, offsetof(CPUState, segs[seg].selector) },\
    { name ".base", offsetof(CPUState, segs[seg].base) },\
    { name ".limit", offsetof(CPUState, segs[seg].limit) },

    { "eax", offsetof(CPUState, regs[0]) },
    { "ecx", offsetof(CPUState, regs[1]) },
    { "edx", offsetof(CPUState, regs[2]) },
    { "ebx", offsetof(CPUState, regs[3]) },
    { "esp|sp", offsetof(CPUState, regs[4]) },
    { "ebp|fp", offsetof(CPUState, regs[5]) },
    { "esi", offsetof(CPUState, regs[6]) },
    { "esi", offsetof(CPUState, regs[7]) },
    { "eflags", offsetof(CPUState, eflags) },

    { "eip", offsetof(CPUState, eip) },
    SEG("cs", R_CS)
    SEG("ds", R_DS)
    SEG("es", R_ES)
    SEG("fs", R_FS)
    SEG("gs", R_GS)
    { "pc", 0, monitor_get_pc, },

#elif defined(TARGET_PPC)
    { "r0", offsetof(CPUState, gpr[0]) },
    { "r1", offsetof(CPUState, gpr[1]) },
    { "r2", offsetof(CPUState, gpr[2]) },
    { "r3", offsetof(CPUState, gpr[3]) },
    { "r4", offsetof(CPUState, gpr[4]) },
    { "r5", offsetof(CPUState, gpr[5]) },
    { "r6", offsetof(CPUState, gpr[6]) },
    { "r7", offsetof(CPUState, gpr[7]) },
    { "r8", offsetof(CPUState, gpr[8]) },
    { "r9", offsetof(CPUState, gpr[9]) },
    { "r10", offsetof(CPUState, gpr[10]) },
    { "r11", offsetof(CPUState, gpr[11]) },
    { "r12", offsetof(CPUState, gpr[12]) },
    { "r13", offsetof(CPUState, gpr[13]) },
    { "r14", offsetof(CPUState, gpr[14]) },
    { "r15", offsetof(CPUState, gpr[15]) },
    { "r16", offsetof(CPUState, gpr[16]) },
    { "r17", offsetof(CPUState, gpr[17]) },
    { "r18", offsetof(CPUState, gpr[18]) },
    { "r19", offsetof(CPUState, gpr[19]) },
    { "r20", offsetof(CPUState, gpr[20]) },
    { "r21", offsetof(CPUState, gpr[21]) },
    { "r22", offsetof(CPUState, gpr[22]) },
    { "r23", offsetof(CPUState, gpr[23]) },
    { "r24", offsetof(CPUState, gpr[24]) },
    { "r25", offsetof(CPUState, gpr[25]) },
    { "r26", offsetof(CPUState, gpr[26]) },
    { "r27", offsetof(CPUState, gpr[27]) },
    { "r28", offsetof(CPUState, gpr[28]) },
    { "r29", offsetof(CPUState, gpr[29]) },
    { "r30", offsetof(CPUState, gpr[30]) },
    { "r31", offsetof(CPUState, gpr[31]) },

    { "nip|pc", offsetof(CPUState, nip) },

    { "lr", offsetof(CPUState, lr) },
    { "ctr", offsetof(CPUState, ctr) },

    { "decr", 0, &monitor_get_decr, },

    { "ccr", 0, &monitor_get_ccr, },
    { "msr", 0, &monitor_get_msr, },
    { "xer", 0, &monitor_get_xer, },

    { "tbu", 0, &monitor_get_tbu, },
    { "tbl", 0, &monitor_get_tbl, },