root / m68k-semi.c @ dc786bc9
History | View | Annotate | Download (12.2 kB)
| 1 |
/*
|
|---|---|
| 2 |
* m68k/ColdFire Semihosting syscall interface
|
| 3 |
*
|
| 4 |
* Copyright (c) 2005-2007 CodeSourcery.
|
| 5 |
*
|
| 6 |
* This program is free software; you can redistribute it and/or modify
|
| 7 |
* it under the terms of the GNU General Public License as published by
|
| 8 |
* the Free Software Foundation; either version 2 of the License, or
|
| 9 |
* (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This program is distributed in the hope that it will be useful,
|
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 14 |
* GNU General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU General Public License
|
| 17 |
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
| 18 |
*/
|
| 19 |
|
| 20 |
#include <sys/types.h> |
| 21 |
#include <sys/stat.h> |
| 22 |
#include <errno.h> |
| 23 |
#include <fcntl.h> |
| 24 |
#include <unistd.h> |
| 25 |
#include <stdlib.h> |
| 26 |
#include <stdio.h> |
| 27 |
#include <sys/time.h> |
| 28 |
#include <time.h> |
| 29 |
|
| 30 |
#include "cpu.h" |
| 31 |
#if defined(CONFIG_USER_ONLY)
|
| 32 |
#include "qemu.h" |
| 33 |
#define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) |
| 34 |
#else
|
| 35 |
#include "qemu-common.h" |
| 36 |
#include "gdbstub.h" |
| 37 |
#include "softmmu-semi.h" |
| 38 |
#endif
|
| 39 |
#include "sysemu.h" |
| 40 |
|
| 41 |
#define HOSTED_EXIT 0 |
| 42 |
#define HOSTED_INIT_SIM 1 |
| 43 |
#define HOSTED_OPEN 2 |
| 44 |
#define HOSTED_CLOSE 3 |
| 45 |
#define HOSTED_READ 4 |
| 46 |
#define HOSTED_WRITE 5 |
| 47 |
#define HOSTED_LSEEK 6 |
| 48 |
#define HOSTED_RENAME 7 |
| 49 |
#define HOSTED_UNLINK 8 |
| 50 |
#define HOSTED_STAT 9 |
| 51 |
#define HOSTED_FSTAT 10 |
| 52 |
#define HOSTED_GETTIMEOFDAY 11 |
| 53 |
#define HOSTED_ISATTY 12 |
| 54 |
#define HOSTED_SYSTEM 13 |
| 55 |
|
| 56 |
typedef uint32_t gdb_mode_t;
|
| 57 |
typedef uint32_t gdb_time_t;
|
| 58 |
|
| 59 |
struct m68k_gdb_stat {
|
| 60 |
uint32_t gdb_st_dev; /* device */
|
| 61 |
uint32_t gdb_st_ino; /* inode */
|
| 62 |
gdb_mode_t gdb_st_mode; /* protection */
|
| 63 |
uint32_t gdb_st_nlink; /* number of hard links */
|
| 64 |
uint32_t gdb_st_uid; /* user ID of owner */
|
| 65 |
uint32_t gdb_st_gid; /* group ID of owner */
|
| 66 |
uint32_t gdb_st_rdev; /* device type (if inode device) */
|
| 67 |
uint64_t gdb_st_size; /* total size, in bytes */
|
| 68 |
uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
|
| 69 |
uint64_t gdb_st_blocks; /* number of blocks allocated */
|
| 70 |
gdb_time_t gdb_st_atime; /* time of last access */
|
| 71 |
gdb_time_t gdb_st_mtime; /* time of last modification */
|
| 72 |
gdb_time_t gdb_st_ctime; /* time of last change */
|
| 73 |
} __attribute__((packed)); |
| 74 |
|
| 75 |
struct gdb_timeval {
|
| 76 |
gdb_time_t tv_sec; /* second */
|
| 77 |
uint64_t tv_usec; /* microsecond */
|
| 78 |
} __attribute__((packed)); |
| 79 |
|
| 80 |
#define GDB_O_RDONLY 0x0 |
| 81 |
#define GDB_O_WRONLY 0x1 |
| 82 |
#define GDB_O_RDWR 0x2 |
| 83 |
#define GDB_O_APPEND 0x8 |
| 84 |
#define GDB_O_CREAT 0x200 |
| 85 |
#define GDB_O_TRUNC 0x400 |
| 86 |
#define GDB_O_EXCL 0x800 |
| 87 |
|
| 88 |
static int translate_openflags(int flags) |
| 89 |
{
|
| 90 |
int hf;
|
| 91 |
|
| 92 |
if (flags & GDB_O_WRONLY)
|
| 93 |
hf = O_WRONLY; |
| 94 |
else if (flags & GDB_O_RDWR) |
| 95 |
hf = O_RDWR; |
| 96 |
else
|
| 97 |
hf = O_RDONLY; |
| 98 |
|
| 99 |
if (flags & GDB_O_APPEND) hf |= O_APPEND;
|
| 100 |
if (flags & GDB_O_CREAT) hf |= O_CREAT;
|
| 101 |
if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
|
| 102 |
if (flags & GDB_O_EXCL) hf |= O_EXCL;
|
| 103 |
|
| 104 |
return hf;
|
| 105 |
} |
| 106 |
|
| 107 |
static void translate_stat(CPUState *env, target_ulong addr, struct stat *s) |
| 108 |
{
|
| 109 |
struct m68k_gdb_stat *p;
|
| 110 |
|
| 111 |
if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0))) |
| 112 |
/* FIXME - should this return an error code? */
|
| 113 |
return;
|
| 114 |
p->gdb_st_dev = cpu_to_be32(s->st_dev); |
| 115 |
p->gdb_st_ino = cpu_to_be32(s->st_ino); |
| 116 |
p->gdb_st_mode = cpu_to_be32(s->st_mode); |
| 117 |
p->gdb_st_nlink = cpu_to_be32(s->st_nlink); |
| 118 |
p->gdb_st_uid = cpu_to_be32(s->st_uid); |
| 119 |
p->gdb_st_gid = cpu_to_be32(s->st_gid); |
| 120 |
p->gdb_st_rdev = cpu_to_be32(s->st_rdev); |
| 121 |
p->gdb_st_size = cpu_to_be64(s->st_size); |
| 122 |
#ifdef _WIN32
|
| 123 |
/* Windows stat is missing some fields. */
|
| 124 |
p->gdb_st_blksize = 0;
|
| 125 |
p->gdb_st_blocks = 0;
|
| 126 |
#else
|
| 127 |
p->gdb_st_blksize = cpu_to_be64(s->st_blksize); |
| 128 |
p->gdb_st_blocks = cpu_to_be64(s->st_blocks); |
| 129 |
#endif
|
| 130 |
p->gdb_st_atime = cpu_to_be32(s->st_atime); |
| 131 |
p->gdb_st_mtime = cpu_to_be32(s->st_mtime); |
| 132 |
p->gdb_st_ctime = cpu_to_be32(s->st_ctime); |
| 133 |
unlock_user(p, addr, sizeof(struct m68k_gdb_stat)); |
| 134 |
} |
| 135 |
|
| 136 |
static int m68k_semi_is_fseek; |
| 137 |
|
| 138 |
static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err) |
| 139 |
{
|
| 140 |
target_ulong args; |
| 141 |
|
| 142 |
args = env->dregs[1];
|
| 143 |
if (m68k_semi_is_fseek) {
|
| 144 |
/* FIXME: We've already lost the high bits of the fseek
|
| 145 |
return value. */
|
| 146 |
/* FIXME - handle put_user() failure */
|
| 147 |
put_user_u32(0, args);
|
| 148 |
args += 4;
|
| 149 |
m68k_semi_is_fseek = 0;
|
| 150 |
} |
| 151 |
/* FIXME - handle put_user() failure */
|
| 152 |
put_user_u32(ret, args); |
| 153 |
put_user_u32(errno, args + 4);
|
| 154 |
} |
| 155 |
|
| 156 |
#define ARG(n) \
|
| 157 |
({ \
|
| 158 |
target_ulong __arg; \ |
| 159 |
/* FIXME - handle get_user() failure */ \
|
| 160 |
get_user_ual(__arg, args + (n) * 4); \
|
| 161 |
__arg; \ |
| 162 |
}) |
| 163 |
#define PARG(x) ((unsigned long)ARG(x)) |
| 164 |
void do_m68k_semihosting(CPUM68KState *env, int nr) |
| 165 |
{
|
| 166 |
uint32_t args; |
| 167 |
void *p;
|
| 168 |
void *q;
|
| 169 |
uint32_t len; |
| 170 |
uint32_t result; |
| 171 |
|
| 172 |
args = env->dregs[1];
|
| 173 |
switch (nr) {
|
| 174 |
case HOSTED_EXIT:
|
| 175 |
gdb_exit(env, env->dregs[0]);
|
| 176 |
exit(env->dregs[0]);
|
| 177 |
case HOSTED_OPEN:
|
| 178 |
if (use_gdb_syscalls()) {
|
| 179 |
gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1), |
| 180 |
ARG(2), ARG(3)); |
| 181 |
return;
|
| 182 |
} else {
|
| 183 |
if (!(p = lock_user_string(ARG(0)))) { |
| 184 |
/* FIXME - check error code? */
|
| 185 |
result = -1;
|
| 186 |
} else {
|
| 187 |
result = open(p, translate_openflags(ARG(2)), ARG(3)); |
| 188 |
unlock_user(p, ARG(0), 0); |
| 189 |
} |
| 190 |
} |
| 191 |
break;
|
| 192 |
case HOSTED_CLOSE:
|
| 193 |
{
|
| 194 |
/* Ignore attempts to close stdin/out/err. */
|
| 195 |
int fd = ARG(0); |
| 196 |
if (fd > 2) { |
| 197 |
if (use_gdb_syscalls()) {
|
| 198 |
gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0)); |
| 199 |
return;
|
| 200 |
} else {
|
| 201 |
result = close(fd); |
| 202 |
} |
| 203 |
} else {
|
| 204 |
result = 0;
|
| 205 |
} |
| 206 |
break;
|
| 207 |
} |
| 208 |
case HOSTED_READ:
|
| 209 |
len = ARG(2);
|
| 210 |
if (use_gdb_syscalls()) {
|
| 211 |
gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
|
| 212 |
ARG(0), ARG(1), len); |
| 213 |
return;
|
| 214 |
} else {
|
| 215 |
if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) { |
| 216 |
/* FIXME - check error code? */
|
| 217 |
result = -1;
|
| 218 |
} else {
|
| 219 |
result = read(ARG(0), p, len);
|
| 220 |
unlock_user(p, ARG(1), len);
|
| 221 |
} |
| 222 |
} |
| 223 |
break;
|
| 224 |
case HOSTED_WRITE:
|
| 225 |
len = ARG(2);
|
| 226 |
if (use_gdb_syscalls()) {
|
| 227 |
gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
|
| 228 |
ARG(0), ARG(1), len); |
| 229 |
return;
|
| 230 |
} else {
|
| 231 |
if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) { |
| 232 |
/* FIXME - check error code? */
|
| 233 |
result = -1;
|
| 234 |
} else {
|
| 235 |
result = write(ARG(0), p, len);
|
| 236 |
unlock_user(p, ARG(0), 0); |
| 237 |
} |
| 238 |
} |
| 239 |
break;
|
| 240 |
case HOSTED_LSEEK:
|
| 241 |
{
|
| 242 |
uint64_t off; |
| 243 |
off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32); |
| 244 |
if (use_gdb_syscalls()) {
|
| 245 |
m68k_semi_is_fseek = 1;
|
| 246 |
gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
|
| 247 |
ARG(0), off, ARG(3)); |
| 248 |
} else {
|
| 249 |
off = lseek(ARG(0), off, ARG(3)); |
| 250 |
/* FIXME - handle put_user() failure */
|
| 251 |
put_user_u32(off >> 32, args);
|
| 252 |
put_user_u32(off, args + 4);
|
| 253 |
put_user_u32(errno, args + 8);
|
| 254 |
} |
| 255 |
return;
|
| 256 |
} |
| 257 |
case HOSTED_RENAME:
|
| 258 |
if (use_gdb_syscalls()) {
|
| 259 |
gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
|
| 260 |
ARG(0), (int)ARG(1), ARG(2), (int)ARG(3)); |
| 261 |
return;
|
| 262 |
} else {
|
| 263 |
p = lock_user_string(ARG(0));
|
| 264 |
q = lock_user_string(ARG(2));
|
| 265 |
if (!p || !q) {
|
| 266 |
/* FIXME - check error code? */
|
| 267 |
result = -1;
|
| 268 |
} else {
|
| 269 |
result = rename(p, q); |
| 270 |
} |
| 271 |
unlock_user(p, ARG(0), 0); |
| 272 |
unlock_user(q, ARG(2), 0); |
| 273 |
} |
| 274 |
break;
|
| 275 |
case HOSTED_UNLINK:
|
| 276 |
if (use_gdb_syscalls()) {
|
| 277 |
gdb_do_syscall(m68k_semi_cb, "unlink,%s",
|
| 278 |
ARG(0), (int)ARG(1)); |
| 279 |
return;
|
| 280 |
} else {
|
| 281 |
if (!(p = lock_user_string(ARG(0)))) { |
| 282 |
/* FIXME - check error code? */
|
| 283 |
result = -1;
|
| 284 |
} else {
|
| 285 |
result = unlink(p); |
| 286 |
unlock_user(p, ARG(0), 0); |
| 287 |
} |
| 288 |
} |
| 289 |
break;
|
| 290 |
case HOSTED_STAT:
|
| 291 |
if (use_gdb_syscalls()) {
|
| 292 |
gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
|
| 293 |
ARG(0), (int)ARG(1), ARG(2)); |
| 294 |
return;
|
| 295 |
} else {
|
| 296 |
struct stat s;
|
| 297 |
if (!(p = lock_user_string(ARG(0)))) { |
| 298 |
/* FIXME - check error code? */
|
| 299 |
result = -1;
|
| 300 |
} else {
|
| 301 |
result = stat(p, &s); |
| 302 |
unlock_user(p, ARG(0), 0); |
| 303 |
} |
| 304 |
if (result == 0) { |
| 305 |
translate_stat(env, ARG(2), &s);
|
| 306 |
} |
| 307 |
} |
| 308 |
break;
|
| 309 |
case HOSTED_FSTAT:
|
| 310 |
if (use_gdb_syscalls()) {
|
| 311 |
gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
|
| 312 |
ARG(0), ARG(1)); |
| 313 |
return;
|
| 314 |
} else {
|
| 315 |
struct stat s;
|
| 316 |
result = fstat(ARG(0), &s);
|
| 317 |
if (result == 0) { |
| 318 |
translate_stat(env, ARG(1), &s);
|
| 319 |
} |
| 320 |
} |
| 321 |
break;
|
| 322 |
case HOSTED_GETTIMEOFDAY:
|
| 323 |
if (use_gdb_syscalls()) {
|
| 324 |
gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
|
| 325 |
ARG(0), ARG(1)); |
| 326 |
return;
|
| 327 |
} else {
|
| 328 |
qemu_timeval tv; |
| 329 |
struct gdb_timeval *p;
|
| 330 |
result = qemu_gettimeofday(&tv); |
| 331 |
if (result != 0) { |
| 332 |
if (!(p = lock_user(VERIFY_WRITE,
|
| 333 |
ARG(0), sizeof(struct gdb_timeval), 0))) { |
| 334 |
/* FIXME - check error code? */
|
| 335 |
result = -1;
|
| 336 |
} else {
|
| 337 |
p->tv_sec = cpu_to_be32(tv.tv_sec); |
| 338 |
p->tv_usec = cpu_to_be64(tv.tv_usec); |
| 339 |
unlock_user(p, ARG(0), sizeof(struct gdb_timeval)); |
| 340 |
} |
| 341 |
} |
| 342 |
} |
| 343 |
break;
|
| 344 |
case HOSTED_ISATTY:
|
| 345 |
if (use_gdb_syscalls()) {
|
| 346 |
gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0)); |
| 347 |
return;
|
| 348 |
} else {
|
| 349 |
result = isatty(ARG(0));
|
| 350 |
} |
| 351 |
break;
|
| 352 |
case HOSTED_SYSTEM:
|
| 353 |
if (use_gdb_syscalls()) {
|
| 354 |
gdb_do_syscall(m68k_semi_cb, "system,%s",
|
| 355 |
ARG(0), (int)ARG(1)); |
| 356 |
return;
|
| 357 |
} else {
|
| 358 |
if (!(p = lock_user_string(ARG(0)))) { |
| 359 |
/* FIXME - check error code? */
|
| 360 |
result = -1;
|
| 361 |
} else {
|
| 362 |
result = system(p); |
| 363 |
unlock_user(p, ARG(0), 0); |
| 364 |
} |
| 365 |
} |
| 366 |
break;
|
| 367 |
case HOSTED_INIT_SIM:
|
| 368 |
#if defined(CONFIG_USER_ONLY)
|
| 369 |
{
|
| 370 |
TaskState *ts = env->opaque; |
| 371 |
/* Allocate the heap using sbrk. */
|
| 372 |
if (!ts->heap_limit) {
|
| 373 |
long ret;
|
| 374 |
uint32_t size; |
| 375 |
uint32_t base; |
| 376 |
|
| 377 |
base = do_brk(0);
|
| 378 |
size = SEMIHOSTING_HEAP_SIZE; |
| 379 |
/* Try a big heap, and reduce the size if that fails. */
|
| 380 |
for (;;) {
|
| 381 |
ret = do_brk(base + size); |
| 382 |
if (ret != -1) |
| 383 |
break;
|
| 384 |
size >>= 1;
|
| 385 |
} |
| 386 |
ts->heap_limit = base + size; |
| 387 |
} |
| 388 |
/* This call may happen before we have writable memory, so return
|
| 389 |
values directly in registers. */
|
| 390 |
env->dregs[1] = ts->heap_limit;
|
| 391 |
env->aregs[7] = ts->stack_base;
|
| 392 |
} |
| 393 |
#else
|
| 394 |
/* FIXME: This is wrong for boards where RAM does not start at
|
| 395 |
address zero. */
|
| 396 |
env->dregs[1] = ram_size;
|
| 397 |
env->aregs[7] = ram_size;
|
| 398 |
#endif
|
| 399 |
return;
|
| 400 |
default:
|
| 401 |
cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
|
| 402 |
result = 0;
|
| 403 |
} |
| 404 |
/* FIXME - handle put_user() failure */
|
| 405 |
put_user_u32(result, args); |
| 406 |
put_user_u32(errno, args + 4);
|
| 407 |
} |