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* mon960-rom.c (mon960_open): Add floating point detection to

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prevent hang on non-FPU processors (PR 9775).
	(mon960_cmds): Swap setmem.cmdw and setmem.cmdl to fix problem
	setting breakpoints and improve loading speed.
This commit is contained in:
Mark Alexander 1996-07-08 15:53:36 +00:00
parent ace4b8d75a
commit ee7b308fe4
2 changed files with 41 additions and 5 deletions
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7
gdb/ChangeLog
View file

@ -1,3 +1,10 @@
Mon Jul 08 08:50:39 1996 Mark Alexander <marka@cygnus.com>
* mon960-rom.c (mon960_open): Add floating point detection to
prevent hang on non-FPU processors (PR 9775).
(mon960_cmds): Swap setmem.cmdw and setmem.cmdl to fix problem
setting breakpoints and improve loading speed.
Sun Jul 7 14:57:34 1996 Fred Fish <fnf@cygnus.com>
* coffread.c (record_minimal_symbol): Don't presave name string

39
gdb/mon960-rom.c
View file

@ -133,7 +133,7 @@ mon960_load (desc, file, hashmark)
/* g0-g14, fp, pfp, sp, rip,r3-15, pc, ac, tc, fp0-3 */
/* NOTE: "ip" is documented as "ir" in the Mon960 UG. */
/* NOTE: "ir" can't be accessed... but there's an ip and rip. */
static char *mon960_regnames[NUM_REGS] = {
static char *full_regnames[NUM_REGS] = {
/* 0 */ "pfp", "sp", "rip", "r3", "r4", "r5", "r6", "r7",
/* 8 */ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
/* 16 */ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
@ -141,13 +141,24 @@ static char *mon960_regnames[NUM_REGS] = {
/* 32 */ "pc", "ac", "tc", "ip", "fp0", "fp1", "fp2", "fp3",
};
static char *mon960_regnames[NUM_REGS];
/* Define the monitor command strings. Since these are passed directly
through to a printf style function, we may include formatting
strings. We also need a CR or LF on the end. */
/* need to pause the monitor for timing reasons, so slow it down */
#if 1
/* FIXME: this extremely long init string causes MON960 to return two NAKS
instead of performing the autobaud recognition, at least when gdb
is running on Linux. The short string below works on Linux, and on
SunOS using a tcp serial connection. Must retest on SunOS using a
direct serial connection; if that works, get rid of the long string. */
static char *mon960_inits[] = {"\n\r\r\r\r\r\r\r\r\r\r\r\r\r\r\n\r\n\r\n", NULL};
#else
static char *mon960_inits[] = { "\r", NULL};
#endif
static struct monitor_ops mon960_cmds =
{
@ -158,7 +169,7 @@ static struct monitor_ops mon960_cmds =
mon960_inits, /* Init strings */
"go\n\r", /* continue command */
"st\n\r", /* single step */
"\n\r", /* break interrupts the program */
NULL, /* break interrupts the program */
NULL, /* set a breakpoint */
/* can't use "br" because only 2 hw bps are supported */
NULL, /* clear a breakpoint - "de" is for hw bps */
@ -168,8 +179,8 @@ static struct monitor_ops mon960_cmds =
{
/* can't use "mb", "md" or "mo" because they require interaction */
NULL, /* setmem.cmdb (addr, value) */
"md %x %x\n\r", /* setmem.cmdw (addr, value) */
NULL, /* setmem.cmdl (addr, value) */
NULL, /* setmem.cmdw (addr, value) */
"md %x %x\n\r", /* setmem.cmdl (addr, value) */
NULL, /* setmem.cmdll (addr, value) */
NULL, /* setmem.resp_delim */
NULL, /* setmem.term */
@ -225,12 +236,31 @@ mon960_open (args, from_tty)
char *args;
int from_tty;
{
char buf[64];
monitor_open (args, &mon960_cmds, from_tty);
/* Attempt to fetch the value of the first floating point register (fp0).
If the monitor returns a string containing the word "Bad" we'll assume
this processor has no floating point registers, and nullify the
regnames entries that refer to FP registers. */
monitor_printf (mon960_cmds.getreg.cmd, full_regnames[FP0_REGNUM]); /* di fp0 */
if (monitor_expect_prompt (buf, sizeof(buf)) != -1)
if (strstr(buf, "Bad") != NULL)
{
int i;
for (i = FP0_REGNUM; i < FP0_REGNUM + 4; i++)
mon960_regnames[i] = NULL;
}
}
void
_initialize_mon960 ()
{
memcpy(mon960_regnames, full_regnames, sizeof(full_regnames));
init_monitor_ops (&mon960_ops);
mon960_ops.to_shortname = "mon960"; /* for the target command */
@ -249,4 +279,3 @@ Specify the serial device it is connected to (e.g. /dev/ttya).";
mon960_ops.to_open = mon960_open;
add_target (&mon960_ops);
}