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qemu/monitor.c
bellard aa455485c9 history support (Jocelyn Mayer) 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@704 c046a42c-6fe2-441c-8c8c-71466251a162
2004-04-04 13:07:25 +00:00

1418 lines
34 KiB
C
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/*
* 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"
//#define DEBUG
#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
#define TERM_CMD_BUF_SIZE 4095
#define TERM_MAX_CMDS 64
#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 int term_esc_state;
static int term_esc_param;
static char *term_history[TERM_MAX_CMDS];
static int term_hist_entry;
/*
* Supported types:
*
* 'F' filename
* '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[];
void term_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
}
void term_flush(void)
{
fflush(stdout);
}
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;
term_printf("%d %s\n", force, filename);
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
/* we use the current CS size */
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");
}
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", "-fs", do_eject,
"[-f] device", "eject a removable media (use -f to force it)" },
{ "change", "sF", 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 $reg for CPU register access)", },
{ NULL, NULL, },
};
static term_cmd_t info_cmds[] = {
{ "network", "", do_info_network,
"", "show the network state" },
{ "block", "", do_info_block,
"", "show the block devices" },
{ "registers", "", do_info_registers,
"", "show the cpu registers" },
{ "history", "", do_info_history,
"", "show the command line history", },
{ NULL, NULL, },
};
/*******************************************************************/
static const char *pch;
static jmp_buf expr_env;
typedef struct MonitorDef {
const char *name;
int offset;
int (*get_value)(struct MonitorDef *md);
} MonitorDef;
static MonitorDef monitor_defs[] = {
#ifdef TARGET_I386
{ "eax", offsetof(CPUState, regs[0]) },
{ "ecx", offsetof(CPUState, regs[1]) },
{ "edx", offsetof(CPUState, regs[2]) },
{ "ebx", offsetof(CPUState, regs[3]) },
{ "esp|sp", offsetof(CPUState, regs[4]) },
{ "ebp|fp", offsetof(CPUState, regs[5]) },
{ "esi", offsetof(CPUState, regs[6]) },
{ "esi", offsetof(CPUState, regs[7]) },
{ "eflags", offsetof(CPUState, eflags) },
{ "eip|pc", offsetof(CPUState, eip) },
#endif
{ NULL },
};
static void expr_error(const char *fmt)
{
term_printf(fmt);
term_printf("\n");
longjmp(expr_env, 1);
}
static int get_monitor_def(int *pval, const char *name)
{
MonitorDef *md;
for(md = monitor_defs; md->name != NULL; md++) {
if (compare_cmd(name, md->name)) {
if (md->get_value) {
*pval = md->get_value(md);
} else {
*pval = *(uint32_t *)((uint8_t *)cpu_single_env + md->offset);
}
return 0;
}
}
return -1;
}
static void next(void)
{
if (pch != '\0') {
pch++;
while (isspace(*pch))
pch++;
}
}
static int expr_sum(void);
static int expr_unary(void)
{
int n;
char *p;
switch(*pch) {
case '+':
next();
n = expr_unary();
break;
case '-':
next();
n = -expr_unary();
break;
case '~':
next();
n = ~expr_unary();
break;
case '(':
next();
n = expr_sum();
if (*pch != ')') {
expr_error("')' expected");
}
next();
break;
case '$':
{
char buf[128], *q;
pch++;
q = buf;
while ((*pch >= 'a' && *pch <= 'z') ||
(*pch >= 'A' && *pch <= 'Z') ||
(*pch >= '0' && *pch <= '9') ||
*pch == '_') {
if ((q - buf) < sizeof(buf) - 1)
*q++ = *pch;
pch++;
}
while (isspace(*pch))
pch++;
*q = 0;
if (get_monitor_def(&n, buf))
expr_error("unknown register");
}
break;
case '\0':
expr_error("unexpected end of expression");
n = 0;
break;
default:
n = strtoul(pch, &p, 0);
if (pch == p) {
expr_error("invalid char in expression");
}
pch = p;
while (isspace(*pch))
pch++;
break;
}
return n;
}
static int expr_prod(void)
{
int val, val2, op;
val = expr_unary();
for(;;) {
op = *pch;
if (op != '*' && op != '/' && op != '%')
break;
next();
val2 = expr_unary();
switch(op) {
default:
case '*':
val *= val2;
break;
case '/':
case '%':
if (val2 == 0)
expr_error("divison by zero");
if (op == '/')
val /= val2;
else
val %= val2;
break;
}
}
return val;
}
static int expr_logic(void)
{
int val, val2, op;
val = expr_prod();
for(;;) {
op = *pch;
if (op != '&' && op != '|' && op != '^')
break;
next();
val2 = expr_prod();
switch(op) {
default:
case '&':
val &= val2;
break;
case '|':
val |= val2;
break;
case '^':
val ^= val2;
break;
}
}
return val;
}
static int expr_sum(void)
{
int val, val2, op;
val = expr_logic();
for(;;) {
op = *pch;
if (op != '+' && op != '-')
break;
next();
val2 = expr_logic();
if (op == '+')
val += val2;
else
val -= val2;
}
return val;
}
static int get_expr(int *pval, const char **pp)
{
pch = *pp;
if (setjmp(expr_env)) {
*pp = pch;
return -1;
}
while (isspace(*pch))
pch++;
*pval = expr_sum();
*pp = pch;
return 0;
}
static int get_str(char *buf, int buf_size, const char **pp)
{
const char *p;
char *q;
int c;
p = *pp;
while (isspace(*p))
p++;
if (*p == '\0') {
fail:
*pp = p;
return -1;
}
q = buf;
if (*p == '\"') {
p++;
while (*p != '\0' && *p != '\"') {
if (*p == '\\') {
p++;
c = *p++;
switch(c) {
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case '\\':
case '\'':
case '\"':
break;
default:
qemu_printf("unsupported escape code: '\\%c'\n", c);
goto fail;
}
if ((q - buf) < buf_size - 1) {
*q++ = c;
}
} else {
if ((q - buf) < buf_size - 1) {
*q++ = *p;
}
p++;
}
}
if (*p != '\"') {
qemu_printf("untermintated string\n");
goto fail;
}
p++;
} else {
while (*p != '\0' && !isspace(*p)) {
if ((q - buf) < buf_size - 1) {
*q++ = *p;
}
p++;
}
*q = '\0';
}
*pp = p;
return 0;
}
static int default_fmt_format = 'x';
static int default_fmt_size = 4;
#define MAX_ARGS 16
static void term_handle_command(const char *cmdline)
{
const char *p, *pstart, *typestr;
char *q;
int c, nb_args, len, i, has_arg;
term_cmd_t *cmd;
char cmdname[256];
char buf[1024];
void *str_allocated[MAX_ARGS];
void *args[MAX_ARGS];
#ifdef DEBUG
term_printf("command='%s'\n", cmdline);
#endif
/* extract the command name */
p = cmdline;
q = cmdname;
while (isspace(*p))
p++;
if (*p == '\0')
return;
pstart = p;
while (*p != '\0' && *p != '/' && !isspace(*p))
p++;
len = p - pstart;
if (len > sizeof(cmdname) - 1)
len = sizeof(cmdname) - 1;
memcpy(cmdname, pstart, len);
cmdname[len] = '\0';
/* find the command */
for(cmd = term_cmds; cmd->name != NULL; cmd++) {
if (compare_cmd(cmdname, cmd->name))
goto found;
}
term_printf("unknown command: '%s'\n", cmdname);
return;
found:
for(i = 0; i < MAX_ARGS; i++)
str_allocated[i] = NULL;
/* parse the parameters */
typestr = cmd->args_type;
nb_args = 0;
for(;;) {
c = *typestr;
if (c == '\0')
break;
typestr++;
switch(c) {
case 'F':
case 's':
{
int ret;
char *str;
while (isspace(*p))
p++;
if (*typestr == '?') {
typestr++;
if (*p == '\0') {
/* no optional string: NULL argument */
str = NULL;
goto add_str;
}
}
ret = get_str(buf, sizeof(buf), &p);
if (ret < 0) {
if (c == 'F')
term_printf("%s: filename expected\n", cmdname);
else
term_printf("%s: string expected\n", cmdname);
goto fail;
}
str = qemu_malloc(strlen(buf) + 1);
strcpy(str, buf);
str_allocated[nb_args] = str;
add_str:
if (nb_args >= MAX_ARGS) {
error_args:
term_printf("%s: too many arguments\n", cmdname);
goto fail;
}
args[nb_args++] = str;
}
break;
case '/':
{
int count, format, size;
while (isspace(*p))
p++;
if (*p == '/') {
/* format found */
p++;
count = 1;
if (isdigit(*p)) {
count = 0;
while (isdigit(*p)) {
count = count * 10 + (*p - '0');
p++;
}
}
size = -1;
format = -1;
for(;;) {
switch(*p) {
case 'o':
case 'd':
case 'u':
case 'x':
case 'i':
case 'c':
format = *p++;
break;
case 'b':
size = 1;
p++;
break;
case 'h':
size = 2;
p++;
break;
case 'w':
size = 4;
p++;
break;
case 'g':
case 'L':
size = 8;
p++;
break;
default:
goto next;
}
}
next:
if (*p != '\0' && !isspace(*p)) {
term_printf("invalid char in format: '%c'\n", *p);
goto fail;
}
if (size < 0)
size = default_fmt_size;
if (format < 0)
format = default_fmt_format;
default_fmt_size = size;
default_fmt_format = format;
} else {
count = 1;
format = default_fmt_format;
size = default_fmt_size;
}
if (nb_args + 3 > MAX_ARGS)
goto error_args;
args[nb_args++] = (void*)count;
args[nb_args++] = (void*)format;
args[nb_args++] = (void*)size;
}
break;
case 'i':
{
int val;
while (isspace(*p))
p++;
if (*typestr == '?') {
typestr++;
if (*p == '\0')
has_arg = 0;
else
has_arg = 1;
if (nb_args >= MAX_ARGS)
goto error_args;
args[nb_args++] = (void *)has_arg;
if (!has_arg) {
if (nb_args >= MAX_ARGS)
goto error_args;
val = -1;
goto add_num;
}
}
if (get_expr(&val, &p))
goto fail;
add_num:
if (nb_args >= MAX_ARGS)
goto error_args;
args[nb_args++] = (void *)val;
}
break;
case '-':
{
int has_option;
/* option */
c = *typestr++;
if (c == '\0')
goto bad_type;
while (isspace(*p))
p++;
has_option = 0;
if (*p == '-') {
p++;
if (*p != c) {
term_printf("%s: unsupported option -%c\n",
cmdname, *p);
goto fail;
}
p++;
has_option = 1;
}
if (nb_args >= MAX_ARGS)
goto error_args;
args[nb_args++] = (void *)has_option;
}
break;
default:
bad_type:
term_printf("%s: unknown type '%c'\n", cmdname, c);
goto fail;
}
}
/* check that all arguments were parsed */
while (isspace(*p))
p++;
if (*p != '\0') {
term_printf("%s: extraneous characters at the end of line\n",
cmdname);
goto fail;
}
switch(nb_args) {
case 0:
cmd->handler();
break;
case 1:
cmd->handler(args[0]);
break;
case 2:
cmd->handler(args[0], args[1]);
break;
case 3:
cmd->handler(args[0], args[1], args[2]);
break;
case 4:
cmd->handler(args[0], args[1], args[2], args[3]);
break;
case 5:
cmd->handler(args[0], args[1], args[2], args[3], args[4]);
break;
default:
term_printf("unsupported number of arguments: %d\n", nb_args);
goto fail;
}
fail:
for(i = 0; i < MAX_ARGS; i++)
qemu_free(str_allocated[i]);
return;
}
static void term_show_prompt(void)
{
term_printf("(qemu) ");
fflush(stdout);
term_cmd_buf_index = 0;
term_cmd_buf_size = 0;
term_esc_state = IS_NORM;
}
static void term_print_cmdline (const char *cmdline)
{
term_show_prompt();
term_printf(cmdline);
term_flush();
}
static void term_insert_char(int ch)
{
if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
memmove(term_cmd_buf + term_cmd_buf_index + 1,
term_cmd_buf + term_cmd_buf_index,
term_cmd_buf_size - term_cmd_buf_index);
term_cmd_buf[term_cmd_buf_index] = ch;
term_cmd_buf_size++;
term_printf("\033[@%c", ch);
term_cmd_buf_index++;
term_flush();
}
}
static void term_backward_char(void)
{
if (term_cmd_buf_index > 0) {
term_cmd_buf_index--;
term_printf("\033[D");
term_flush();
}
}
static void term_forward_char(void)
{
if (term_cmd_buf_index < term_cmd_buf_size) {
term_cmd_buf_index++;
term_printf("\033[C");
term_flush();
}
}
static void term_delete_char(void)
{
if (term_cmd_buf_index < term_cmd_buf_size) {
memmove(term_cmd_buf + term_cmd_buf_index,
term_cmd_buf + term_cmd_buf_index + 1,
term_cmd_buf_size - term_cmd_buf_index - 1);
term_printf("\033[P");
term_cmd_buf_size--;
term_flush();
}
}
static void term_backspace(void)
{
if (term_cmd_buf_index > 0) {
term_backward_char();
term_delete_char();
}
}
static void term_bol(void)
{
while (term_cmd_buf_index > 0)
term_backward_char();
}
static void term_eol(void)
{
while (term_cmd_buf_index < term_cmd_buf_size)
term_forward_char();
}
static void term_up_char(void)
{
int idx;
if (term_hist_entry == 0)
return;
if (term_hist_entry == -1) {
/* Find latest entry */
for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
if (term_history[idx] == NULL)
break;
}
term_hist_entry = idx;
}
term_hist_entry--;
if (term_hist_entry >= 0) {
strcpy(term_cmd_buf, term_history[term_hist_entry]);
term_printf("\n");
term_print_cmdline(term_cmd_buf);
term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
}
}
static void term_down_char(void)
{
if (term_hist_entry == TERM_MAX_CMDS - 1 || term_hist_entry == -1)
return;
if (term_history[++term_hist_entry] != NULL) {
strcpy(term_cmd_buf, term_history[term_hist_entry]);
} else {
term_hist_entry = -1;
}
term_printf("\n");
term_print_cmdline(term_cmd_buf);
term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
}
static void term_hist_add(const char *cmdline)
{
char *hist_entry, *new_entry;
int idx;
if (cmdline[0] == '\0')
return;
new_entry = NULL;
if (term_hist_entry != -1) {
/* We were editing an existing history entry: replace it */
hist_entry = term_history[term_hist_entry];
idx = term_hist_entry;
if (strcmp(hist_entry, cmdline) == 0) {
goto same_entry;
}
}
/* Search cmdline in history buffers */
for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
hist_entry = term_history[idx];
if (hist_entry == NULL)
break;
if (strcmp(hist_entry, cmdline) == 0) {
same_entry:
new_entry = hist_entry;
/* Put this entry at the end of history */
memmove(&term_history[idx], &term_history[idx + 1],
&term_history[TERM_MAX_CMDS] - &term_history[idx + 1]);
term_history[TERM_MAX_CMDS - 1] = NULL;
for (; idx < TERM_MAX_CMDS; idx++) {
if (term_history[idx] == NULL)
break;
}
break;
}
}
if (idx == TERM_MAX_CMDS) {
/* Need to get one free slot */
free(term_history[0]);
memcpy(term_history, &term_history[1],
&term_history[TERM_MAX_CMDS] - &term_history[1]);
term_history[TERM_MAX_CMDS - 1] = NULL;
idx = TERM_MAX_CMDS - 1;
}
if (new_entry == NULL)
new_entry = strdup(cmdline);
term_history[idx] = new_entry;
term_hist_entry = -1;
}
/* return true if command handled */
static void term_handle_byte(int ch)
{
switch(term_esc_state) {
case IS_NORM:
switch(ch) {
case 1:
term_bol();
break;
case 5:
term_eol();
break;
case 10:
case 13:
term_cmd_buf[term_cmd_buf_size] = '\0';
term_hist_add(term_cmd_buf);
term_printf("\n");
term_handle_command(term_cmd_buf);
term_show_prompt();
break;
case 27:
term_esc_state = IS_ESC;
break;
case 127:
case 8:
term_backspace();
break;
case 155:
term_esc_state = IS_CSI;
break;
default:
if (ch >= 32) {
term_insert_char(ch);
}
break;
}
break;
case IS_ESC:
if (ch == '[') {
term_esc_state = IS_CSI;
term_esc_param = 0;
} else {
term_esc_state = IS_NORM;
}
break;
case IS_CSI:
switch(ch) {
case 'A':
case 'F':
term_up_char();
break;
case 'B':
case 'E':
term_down_char();
break;
case 'D':
term_backward_char();
break;
case 'C':
term_forward_char();
break;
case '0' ... '9':
term_esc_param = term_esc_param * 10 + (ch - '0');
goto the_end;
case '~':
switch(term_esc_param) {
case 1:
term_bol();
break;
case 3:
term_delete_char();
break;
case 4:
term_eol();
break;
}
break;
default:
break;
}
term_esc_state = IS_NORM;
the_end:
break;
}
}
/*************************************************************/
/* serial console support */
#define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */
static int term_got_escape, term_command;
void term_print_help(void)
{
term_printf("\n"
"C-a h print this help\n"
"C-a x exit emulatior\n"
"C-a s save disk data back to file (if -snapshot)\n"
"C-a b send break (magic sysrq)\n"
"C-a c switch between console and monitor\n"
"C-a C-a send C-a\n"
);
}
/* called when a char is received */
static void term_received_byte(int ch)
{
if (!serial_console) {
/* if no serial console, handle every command */
term_handle_byte(ch);
} else {
if (term_got_escape) {
term_got_escape = 0;
switch(ch) {
case 'h':
term_print_help();
break;
case 'x':
exit(0);
break;
case 's':
{
int i;
for (i = 0; i < MAX_DISKS; i++) {
if (bs_table[i])
bdrv_commit(bs_table[i]);
}
}
break;
case 'b':
if (serial_console)
serial_receive_break(serial_console);
break;
case 'c':
if (!term_command) {
term_show_prompt();
term_command = 1;
} else {
term_command = 0;
}
break;
case TERM_ESCAPE:
goto send_char;
}
} else if (ch == TERM_ESCAPE) {
term_got_escape = 1;
} else {
send_char:
if (term_command) {
term_handle_byte(ch);
} else {
if (serial_console)
serial_receive_byte(serial_console, ch);
}
}
}
}
static int term_can_read(void *opaque)
{
if (serial_console) {
return serial_can_receive(serial_console);
} else {
return 128;
}
}
static void term_read(void *opaque, const uint8_t *buf, int size)
{
int i;
for(i = 0; i < size; i++)
term_received_byte(buf[i]);
}
void monitor_init(void)
{
if (!serial_console) {
term_printf("QEMU %s monitor - type 'help' for more information\n",
QEMU_VERSION);
term_show_prompt();
}
term_hist_entry = -1;
qemu_add_fd_read_handler(0, term_can_read, term_read, NULL);
}
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