mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
757b3c2fea
Add conditional logic around fcntl.h F_{G,S}ETFL usage to fix builds
on systems that don't have it (e.g. Windows). The code is only used
to save & restore limited terminal stdin state.
483 lines
11 KiB
C
483 lines
11 KiB
C
/* This file is part of SIS (SPARC instruction simulator)
|
|
|
|
Copyright (C) 1995-2021 Free Software Foundation, Inc.
|
|
Contributed by Jiri Gaisler, European Space Agency
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
/* This must come before any other includes. */
|
|
#include "defs.h"
|
|
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/fcntl.h>
|
|
#include "sis.h"
|
|
#include "libiberty.h"
|
|
#include "bfd.h"
|
|
#include <dis-asm.h>
|
|
#include "sim-config.h"
|
|
|
|
#include "sim/sim.h"
|
|
#include "gdb/signals.h"
|
|
|
|
#define PSR_CWP 0x7
|
|
|
|
extern struct disassemble_info dinfo;
|
|
extern struct pstate sregs;
|
|
extern struct estate ebase;
|
|
|
|
extern int ctrl_c;
|
|
extern int nfp;
|
|
extern int ift;
|
|
extern int rom8;
|
|
extern int wrp;
|
|
extern int uben;
|
|
extern int sis_verbose;
|
|
extern char *sis_version;
|
|
extern struct estate ebase;
|
|
extern struct evcell evbuf[];
|
|
extern struct irqcell irqarr[];
|
|
extern int irqpend, ext_irl;
|
|
extern int sparclite;
|
|
extern int dumbio;
|
|
extern int sparclite_board;
|
|
extern int termsave;
|
|
extern char uart_dev1[], uart_dev2[];
|
|
|
|
int sis_gdb_break = 1;
|
|
|
|
host_callback *sim_callback;
|
|
|
|
int
|
|
run_sim(struct pstate *sregs, uint64 icount, int dis)
|
|
{
|
|
int mexc, irq;
|
|
|
|
if (sis_verbose)
|
|
(*sim_callback->printf_filtered) (sim_callback, "resuming at %x\n",
|
|
sregs->pc);
|
|
init_stdio();
|
|
sregs->starttime = get_time();
|
|
irq = 0;
|
|
if ((sregs->pc != 0) && (ebase.simtime == 0))
|
|
boot_init();
|
|
while (!sregs->err_mode & (icount > 0)) {
|
|
|
|
sregs->fhold = 0;
|
|
sregs->hold = 0;
|
|
sregs->icnt = 1;
|
|
|
|
if (sregs->psr & 0x080)
|
|
sregs->asi = 8;
|
|
else
|
|
sregs->asi = 9;
|
|
|
|
#if 0 /* DELETE ME! for debugging purposes only */
|
|
if (sis_verbose > 1)
|
|
if (sregs->pc == 0 || sregs->npc == 0)
|
|
printf ("bogus pc or npc\n");
|
|
#endif
|
|
mexc = memory_iread (sregs->pc, &sregs->inst, &sregs->hold);
|
|
#if 0 /* DELETE ME! for debugging purposes only */
|
|
if (sis_verbose > 2)
|
|
printf("pc %x, np %x, sp %x, fp %x, wm %x, cw %x, i %08x\n",
|
|
sregs->pc, sregs->npc,
|
|
sregs->r[(((sregs->psr & 7) << 4) + 14) & 0x7f],
|
|
sregs->r[(((sregs->psr & 7) << 4) + 30) & 0x7f],
|
|
sregs->wim,
|
|
sregs->psr & 7,
|
|
sregs->inst);
|
|
#endif
|
|
if (sregs->annul) {
|
|
sregs->annul = 0;
|
|
sregs->icnt = 1;
|
|
sregs->pc = sregs->npc;
|
|
sregs->npc = sregs->npc + 4;
|
|
} else {
|
|
if (ext_irl) irq = check_interrupts(sregs);
|
|
if (!irq) {
|
|
if (mexc) {
|
|
sregs->trap = I_ACC_EXC;
|
|
} else {
|
|
if ((sis_gdb_break) && (sregs->inst == 0x91d02001)) {
|
|
if (sis_verbose)
|
|
(*sim_callback->printf_filtered) (sim_callback,
|
|
"SW BP hit at %x\n", sregs->pc);
|
|
sim_halt();
|
|
restore_stdio();
|
|
clearerr(stdin);
|
|
return BPT_HIT;
|
|
} else
|
|
dispatch_instruction(sregs);
|
|
}
|
|
icount--;
|
|
}
|
|
if (sregs->trap) {
|
|
irq = 0;
|
|
sregs->err_mode = execute_trap(sregs);
|
|
}
|
|
}
|
|
advance_time(sregs);
|
|
if (ctrl_c) {
|
|
icount = 0;
|
|
}
|
|
}
|
|
sim_halt();
|
|
sregs->tottime += get_time() - sregs->starttime;
|
|
restore_stdio();
|
|
clearerr(stdin);
|
|
if (sregs->err_mode)
|
|
error_mode(sregs->pc);
|
|
if (sregs->err_mode)
|
|
return ERROR;
|
|
if (sregs->bphit) {
|
|
if (sis_verbose)
|
|
(*sim_callback->printf_filtered) (sim_callback,
|
|
"HW BP hit at %x\n", sregs->pc);
|
|
return BPT_HIT;
|
|
}
|
|
if (ctrl_c) {
|
|
ctrl_c = 0;
|
|
return CTRL_C;
|
|
}
|
|
return TIME_OUT;
|
|
}
|
|
|
|
SIM_DESC
|
|
sim_open (SIM_OPEN_KIND kind, struct host_callback_struct *callback,
|
|
struct bfd *abfd, char * const *argv)
|
|
{
|
|
|
|
int argc = 0;
|
|
int stat = 1;
|
|
int freq = 0;
|
|
|
|
sim_callback = callback;
|
|
|
|
argc = countargv (argv);
|
|
while (stat < argc) {
|
|
if (argv[stat][0] == '-') {
|
|
if (strcmp(argv[stat], "-v") == 0) {
|
|
sis_verbose++;
|
|
} else
|
|
if (strcmp(argv[stat], "-nfp") == 0) {
|
|
nfp = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-ift") == 0) {
|
|
ift = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-sparclite") == 0) {
|
|
sparclite = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-sparclite-board") == 0) {
|
|
sparclite_board = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-dumbio") == 0) {
|
|
dumbio = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-wrp") == 0) {
|
|
wrp = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-rom8") == 0) {
|
|
rom8 = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-uben") == 0) {
|
|
uben = 1;
|
|
} else
|
|
if (strcmp(argv[stat], "-uart1") == 0) {
|
|
if ((stat + 1) < argc)
|
|
strcpy(uart_dev1, argv[++stat]);
|
|
} else
|
|
if (strcmp(argv[stat], "-uart2") == 0) {
|
|
if ((stat + 1) < argc)
|
|
strcpy(uart_dev2, argv[++stat]);
|
|
} else
|
|
if (strcmp(argv[stat], "-nogdb") == 0) {
|
|
sis_gdb_break = 0;
|
|
} else
|
|
if (strcmp(argv[stat], "-freq") == 0) {
|
|
if ((stat + 1) < argc) {
|
|
freq = strtol(argv[++stat], (char **)NULL, 0);
|
|
}
|
|
} else
|
|
if (strncmp(argv[stat], "--sysroot=", sizeof("--sysroot=") - 1) == 0) {
|
|
/* Ignore until we start to support this. */
|
|
} else {
|
|
(*sim_callback->printf_filtered) (sim_callback,
|
|
"unknown option %s\n",
|
|
argv[stat]);
|
|
}
|
|
} else
|
|
bfd_load(argv[stat]);
|
|
stat++;
|
|
}
|
|
|
|
if (sis_verbose) {
|
|
(*sim_callback->printf_filtered) (sim_callback, "\n SIS - SPARC instruction simulator %s\n", sis_version);
|
|
(*sim_callback->printf_filtered) (sim_callback, " Bug-reports to Jiri Gaisler ESA/ESTEC (jgais@wd.estec.esa.nl)\n");
|
|
if (nfp)
|
|
(*sim_callback->printf_filtered) (sim_callback, "no FPU\n");
|
|
if (sparclite)
|
|
(*sim_callback->printf_filtered) (sim_callback, "simulating Sparclite\n");
|
|
if (dumbio)
|
|
(*sim_callback->printf_filtered) (sim_callback, "dumb IO (no input, dumb output)\n");
|
|
if (sis_gdb_break == 0)
|
|
(*sim_callback->printf_filtered) (sim_callback, "disabling GDB trap handling for breakpoints\n");
|
|
if (freq)
|
|
(*sim_callback->printf_filtered) (sim_callback, " ERC32 freq %d Mhz\n", freq);
|
|
}
|
|
|
|
sregs.freq = freq ? freq : 15;
|
|
#ifdef F_GETFL
|
|
termsave = fcntl(0, F_GETFL, 0);
|
|
#endif
|
|
INIT_DISASSEMBLE_INFO(dinfo, stdout,(fprintf_ftype)fprintf);
|
|
#ifdef HOST_LITTLE_ENDIAN
|
|
dinfo.endian = BFD_ENDIAN_LITTLE;
|
|
#else
|
|
dinfo.endian = BFD_ENDIAN_BIG;
|
|
#endif
|
|
reset_all();
|
|
ebase.simtime = 0;
|
|
init_sim();
|
|
init_bpt(&sregs);
|
|
reset_stat(&sregs);
|
|
|
|
/* Fudge our descriptor for now. */
|
|
return (SIM_DESC) 1;
|
|
}
|
|
|
|
void
|
|
sim_close(SIM_DESC sd, int quitting)
|
|
{
|
|
|
|
exit_sim();
|
|
#ifdef F_SETFL
|
|
fcntl(0, F_SETFL, termsave);
|
|
#endif
|
|
}
|
|
|
|
SIM_RC
|
|
sim_load(SIM_DESC sd, const char *prog, bfd *abfd, int from_tty)
|
|
{
|
|
bfd_load (prog);
|
|
return SIM_RC_OK;
|
|
}
|
|
|
|
SIM_RC
|
|
sim_create_inferior(SIM_DESC sd, bfd *abfd, char * const *argv,
|
|
char * const *env)
|
|
{
|
|
bfd_vma start_address = 0;
|
|
if (abfd != NULL)
|
|
start_address = bfd_get_start_address (abfd);
|
|
|
|
ebase.simtime = 0;
|
|
reset_all();
|
|
reset_stat(&sregs);
|
|
sregs.pc = start_address & ~3;
|
|
sregs.npc = sregs.pc + 4;
|
|
return SIM_RC_OK;
|
|
}
|
|
|
|
int
|
|
sim_store_register(SIM_DESC sd, int regno, unsigned char *value, int length)
|
|
{
|
|
int regval;
|
|
|
|
regval = (value[0] << 24) | (value[1] << 16)
|
|
| (value[2] << 8) | value[3];
|
|
set_regi(&sregs, regno, regval);
|
|
return length;
|
|
}
|
|
|
|
|
|
int
|
|
sim_fetch_register(SIM_DESC sd, int regno, unsigned char *buf, int length)
|
|
{
|
|
get_regi(&sregs, regno, buf);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
sim_write (SIM_DESC sd, SIM_ADDR mem, const unsigned char *buf, int length)
|
|
{
|
|
int i, len;
|
|
|
|
for (i = 0; i < length; i++) {
|
|
sis_memory_write ((mem + i) ^ EBT, &buf[i], 1);
|
|
}
|
|
return length;
|
|
}
|
|
|
|
int
|
|
sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
|
|
{
|
|
int i, len;
|
|
|
|
for (i = 0; i < length; i++) {
|
|
sis_memory_read ((mem + i) ^ EBT, &buf[i], 1);
|
|
}
|
|
return length;
|
|
}
|
|
|
|
void
|
|
sim_info(SIM_DESC sd, int verbose)
|
|
{
|
|
show_stat(&sregs);
|
|
}
|
|
|
|
int simstat = OK;
|
|
|
|
void
|
|
sim_stop_reason(SIM_DESC sd, enum sim_stop *reason, int *sigrc)
|
|
{
|
|
|
|
switch (simstat) {
|
|
case CTRL_C:
|
|
*reason = sim_stopped;
|
|
*sigrc = GDB_SIGNAL_INT;
|
|
break;
|
|
case OK:
|
|
case TIME_OUT:
|
|
case BPT_HIT:
|
|
*reason = sim_stopped;
|
|
*sigrc = GDB_SIGNAL_TRAP;
|
|
break;
|
|
case ERROR:
|
|
*sigrc = 0;
|
|
*reason = sim_exited;
|
|
}
|
|
ctrl_c = 0;
|
|
simstat = OK;
|
|
}
|
|
|
|
/* Flush all register windows out to the stack. Starting after the invalid
|
|
window, flush all windows up to, and including the current window. This
|
|
allows GDB to do backtraces and look at local variables for frames that
|
|
are still in the register windows. Note that strictly speaking, this
|
|
behavior is *wrong* for several reasons. First, it doesn't use the window
|
|
overflow handlers. It therefore assumes standard frame layouts and window
|
|
handling policies. Second, it changes system state behind the back of the
|
|
target program. I expect this to mainly pose problems when debugging trap
|
|
handlers.
|
|
*/
|
|
|
|
static void
|
|
flush_windows (void)
|
|
{
|
|
int invwin;
|
|
int cwp;
|
|
int win;
|
|
int ws;
|
|
|
|
/* Keep current window handy */
|
|
|
|
cwp = sregs.psr & PSR_CWP;
|
|
|
|
/* Calculate the invalid window from the wim. */
|
|
|
|
for (invwin = 0; invwin <= PSR_CWP; invwin++)
|
|
if ((sregs.wim >> invwin) & 1)
|
|
break;
|
|
|
|
/* Start saving with the window after the invalid window. */
|
|
|
|
invwin = (invwin - 1) & PSR_CWP;
|
|
|
|
for (win = invwin; ; win = (win - 1) & PSR_CWP)
|
|
{
|
|
uint32 sp;
|
|
int i;
|
|
|
|
sp = sregs.r[(win * 16 + 14) & 0x7f];
|
|
#if 1
|
|
if (sis_verbose > 2) {
|
|
uint32 fp = sregs.r[(win * 16 + 30) & 0x7f];
|
|
printf("flush_window: win %d, sp %x, fp %x\n", win, sp, fp);
|
|
}
|
|
#endif
|
|
|
|
for (i = 0; i < 16; i++)
|
|
memory_write (11, sp + 4 * i, &sregs.r[(win * 16 + 16 + i) & 0x7f], 2,
|
|
&ws);
|
|
|
|
if (win == cwp)
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
sim_resume(SIM_DESC sd, int step, int siggnal)
|
|
{
|
|
simstat = run_sim(&sregs, UINT64_MAX, 0);
|
|
|
|
if (sis_gdb_break) flush_windows ();
|
|
}
|
|
|
|
void
|
|
sim_do_command(SIM_DESC sd, const char *cmd)
|
|
{
|
|
exec_cmd(&sregs, cmd);
|
|
}
|
|
|
|
char **
|
|
sim_complete_command (SIM_DESC sd, const char *text, const char *word)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
char *
|
|
sim_memory_map (SIM_DESC sd)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#if 0 /* FIXME: These shouldn't exist. */
|
|
|
|
int
|
|
sim_insert_breakpoint(int addr)
|
|
{
|
|
if (sregs.bptnum < BPT_MAX) {
|
|
sregs.bpts[sregs.bptnum] = addr & ~0x3;
|
|
sregs.bptnum++;
|
|
if (sis_verbose)
|
|
(*sim_callback->printf_filtered) (sim_callback, "inserted HW BP at %x\n", addr);
|
|
return 0;
|
|
} else
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
sim_remove_breakpoint(int addr)
|
|
{
|
|
int i = 0;
|
|
|
|
while ((i < sregs.bptnum) && (sregs.bpts[i] != addr))
|
|
i++;
|
|
if (addr == sregs.bpts[i]) {
|
|
for (; i < sregs.bptnum - 1; i++)
|
|
sregs.bpts[i] = sregs.bpts[i + 1];
|
|
sregs.bptnum -= 1;
|
|
if (sis_verbose)
|
|
(*sim_callback->printf_filtered) (sim_callback, "removed HW BP at %x\n", addr);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#endif
|