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121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/*
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* xemu QEMU Monitor Interface
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*
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* Copyright (c) 2020-2021 Matt Borgerson
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*
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* Based on gdbstub.c
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "ui/console.h"
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#include "ui/input.h"
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#include "sysemu/sysemu.h"
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#include "monitor/monitor.h"
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#include "chardev/char.h"
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#include "xemu-monitor.h"
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#define TYPE_CHARDEV_XEMU_MONITOR "chardev-xemu-monitor"
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static Chardev *mon_chr;
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static char mon_buffer[12*4096];
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static const size_t mon_buffer_size = sizeof(mon_buffer);
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static size_t offset;
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static void char_xemu_class_init(ObjectClass *oc, void *data);
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static void xemu_monitor_open(Chardev *chr, ChardevBackend *backend,
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bool *be_opened, Error **errp);
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static int xemu_monitor_buffer_append(Chardev *chr, const uint8_t *buf, int len);
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static void char_xemu_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->internal = true;
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cc->open = xemu_monitor_open;
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cc->chr_write = xemu_monitor_buffer_append;
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}
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static void xemu_monitor_open(Chardev *chr, ChardevBackend *backend,
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bool *be_opened, Error **errp)
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{
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*be_opened = false;
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}
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void xemu_monitor_init(void)
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{
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/* For simplicity, assume this is only created once */
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assert(mon_chr == NULL);
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mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_XEMU_MONITOR,
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NULL, NULL, &error_abort);
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monitor_init_hmp(mon_chr, false, &error_abort);
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}
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char *xemu_get_monitor_buffer(void)
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{
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return mon_buffer;
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}
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static int xemu_monitor_buffer_append(Chardev *chr, const uint8_t *buf, int len)
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{
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if ((offset+len+1) >= mon_buffer_size) {
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/* Reached the end of the buffer. Keep it simple and
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* just start back at the beginning.
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*/
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offset = 0;
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}
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/* Copy string into the monitor buffer and terminate */
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assert((len+1) <= mon_buffer_size);
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memcpy(&mon_buffer[offset], buf, len);
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offset += len;
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mon_buffer[offset] = '\x00';
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return len;
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}
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void xemu_run_monitor_command(const char *cmd)
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{
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/* Copy command into buffer */
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xemu_monitor_buffer_append(mon_chr, (const uint8_t*)"# ", 2);
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xemu_monitor_buffer_append(mon_chr, (const uint8_t*)cmd, strlen(cmd));
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xemu_monitor_buffer_append(mon_chr, (const uint8_t*)"\n", 1);
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/* Send command to monitor */
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int len = strlen(cmd)+1;
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/* FIXME: qemu_chr_be_write needs to be fixed to declare inbuf as const. It
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* does not modify the data. Cast for now.
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*/
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qemu_chr_be_write(mon_chr, (unsigned char*)cmd, len);
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}
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static const TypeInfo char_xemu_type_info = {
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.name = TYPE_CHARDEV_XEMU_MONITOR,
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.parent = TYPE_CHARDEV,
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.class_init = char_xemu_class_init,
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};
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static void register_types(void)
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{
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type_register_static(&char_xemu_type_info);
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}
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type_init(register_types);
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