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monitor: Pass-through for gdbstub (Jan Kiszka)

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Create a monitor terminal and pass it through the gdbstub. This allows
to use gdb's monitor command to access the QEMU monitor. Works for all
commands except for non-detached migration and password retrieval (user
will receive error messages instead).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6718 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-03-05 23:01:55 +00:00
parent cde76ee16a
commit 8a34a0fb03
1 changed files with 53 additions and 1 deletions
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54
gdbstub.c
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@ -30,6 +30,7 @@
#include "qemu.h"
#else
#include "monitor.h"
#include "qemu-char.h"
#include "sysemu.h"
#include "gdbstub.h"
@ -285,6 +286,7 @@ typedef struct GDBState {
int running_state;
#else
CharDriverState *chr;
CharDriverState *mon_chr;
#endif
} GDBState;
@ -1819,7 +1821,22 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
put_packet(s, buf);
break;
}
#endif
#else /* !CONFIG_LINUX_USER */
else if (strncmp(p, "Rcmd,", 5) == 0) {
int len = strlen(p + 5);
if ((len % 2) != 0) {
put_packet(s, "E01");
break;
}
hextomem(mem_buf, p + 5, len);
len = len / 2;
mem_buf[len++] = 0;
qemu_chr_read(s->mon_chr, mem_buf, len);
put_packet(s, "OK");
break;
}
#endif /* !CONFIG_LINUX_USER */
if (strncmp(p, "Supported", 9) == 0) {
snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH);
#ifdef GDB_CORE_XML
@ -2282,6 +2299,35 @@ static void gdb_chr_event(void *opaque, int event)
}
}
static void gdb_monitor_output(GDBState *s, const char *msg, int len)
{
char buf[MAX_PACKET_LENGTH];
buf[0] = 'O';
if (len > (MAX_PACKET_LENGTH/2) - 1)
len = (MAX_PACKET_LENGTH/2) - 1;
memtohex(buf + 1, (uint8_t *)msg, len);
put_packet(s, buf);
}
static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len)
{
const char *p = (const char *)buf;
int max_sz;
max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2;
for (;;) {
if (len <= max_sz) {
gdb_monitor_output(gdbserver_state, p, len);
break;
}
gdb_monitor_output(gdbserver_state, p, max_sz);
p += max_sz;
len -= max_sz;
}
return len;
}
int gdbserver_start(const char *port)
{
GDBState *s;
@ -2313,6 +2359,12 @@ int gdbserver_start(const char *port)
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive,
gdb_chr_event, NULL);
qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
/* Initialize a monitor terminal for gdb */
s->mon_chr = qemu_mallocz(sizeof(*s->mon_chr));
s->mon_chr->chr_write = gdb_monitor_write;
monitor_init(s->mon_chr, 0);
return 0;
}
#endif