/* Does not acknowledge. */
static int
attempt_receive_packet(struct gdb_context *ctx)
{
u8 csum;
u8 received_csum;
u8 ch;
/* Skip over everything up to the first '$' */
while ( (ch = gdb_io_read(ctx)) != '$' )
continue;
csum = 0;
for ( ctx->in_bytes = 0;
ctx->in_bytes < sizeof(ctx->in_buf);
ctx->in_bytes++ )
{
ch = gdb_io_read(ctx);
if ( ch == '#' )
break;
ctx->in_buf[ctx->in_bytes] = ch;
csum += ch;
}
if ( ctx->in_bytes == sizeof(ctx->in_buf) )
{
dbg_printk("WARNING: GDB sent a stupidly big packet.\n");
return -1;
}
ctx->in_buf[ctx->in_bytes] = '\0';
received_csum = char2hex(gdb_io_read(ctx)) * 16 +
char2hex(gdb_io_read(ctx));
return (received_csum == csum) ? 0 : -1;
}
void gdb_recv_packet()
{
uint8_t *ptr;
size_t len, remain = 0;
do
{
do
{
len = remain;
remain = 0;
ptr = &gdb_input[len];
len += gdb_io_read(ptr, sizeof(gdb_input) - len);
if(len)
{
remain = gdb_consume_packet(gdb_input, len);
debug(GDBSTUB_PKT, "remain (%D)\n", remain);
if(remain && remain != len)
{
ptr = gdb_input + (len - remain);
memcpy(gdb_input, ptr, remain);
}
}
} while(remain);
} while(gdb_locked());
}
static int
gdb_check_ack(struct gdb_context *ctx)
{
u8 c = gdb_io_read(ctx);
switch ( c )
{
case '+':
return 1;
case '-':
return 0;
default:
printk("Bad ack: %c\n", c);
return 0;
}
}
void gdb_wait_ack()
{
uint8_t x;
while(gdb_io_read(&x, 1) != 1 && x != GDB_ACK_BYTE);
}
