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Wrap our drivers gdb_getc() function so that if it returns -1 we

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try again.  This way it matches the console behaviour and allows us
to share more code.
This commit is contained in:
Poul-Henning Kamp 2006-05-26 11:52:20 +00:00
parent 3fc7129ed1
commit f346afc439
1 changed files with 20 additions and 5 deletions
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25
sys/gdb/gdb_packet.c
View file

@ -47,6 +47,21 @@ char *gdb_txp = NULL; /* Used in inline functions. */
10 + (((c) < 'a') ? (c) - 'A' : (c) - 'a'))
#define N2C(n) (((n) < 10) ? (n) + '0' : (n) + 'a' - 10)
/*
* Get a single character
*/
static int
gdb_getc(void)
{
int c;
do
c = gdb_cur->gdb_getc();
while (c == -1);
return (c);
}
/*
* Functions to receive and extract from a packet.
*/
@ -62,14 +77,14 @@ gdb_rx_begin(void)
* Wait for the start character, ignore all others.
* XXX needs a timeout.
*/
while ((c = gdb_cur->gdb_getc()) != '$')
while ((c = gdb_getc()) != '$')
;
/* Read until a # or end of buffer is found. */
cksum = 0;
gdb_rxsz = 0;
while (gdb_rxsz < sizeof(gdb_rxbuf) - 1) {
c = gdb_cur->gdb_getc();
c = gdb_getc();
if (c == '#')
break;
gdb_rxbuf[gdb_rxsz++] = c;
@ -84,9 +99,9 @@ gdb_rx_begin(void)
return (ENOSPC);
}
c = gdb_cur->gdb_getc();
c = gdb_getc();
cksum -= (C2N(c) << 4) & 0xf0;
c = gdb_cur->gdb_getc();
c = gdb_getc();
cksum -= C2N(c) & 0x0f;
gdb_cur->gdb_putc((cksum == 0) ? '+' : '-');
if (cksum != 0)
@ -245,7 +260,7 @@ gdb_tx_end(void)
c = cksum & 0x0f;
gdb_cur->gdb_putc(N2C(c));
c = gdb_cur->gdb_getc();
c = gdb_getc();
} while (c != '+');
return (0);