1fcf5ef2aSThomas Huth /* 2fcf5ef2aSThomas Huth * m68k/ColdFire Semihosting syscall interface 3fcf5ef2aSThomas Huth * 4fcf5ef2aSThomas Huth * Copyright (c) 2005-2007 CodeSourcery. 5fcf5ef2aSThomas Huth * 6fcf5ef2aSThomas Huth * This program is free software; you can redistribute it and/or modify 7fcf5ef2aSThomas Huth * it under the terms of the GNU General Public License as published by 8fcf5ef2aSThomas Huth * the Free Software Foundation; either version 2 of the License, or 9fcf5ef2aSThomas Huth * (at your option) any later version. 10fcf5ef2aSThomas Huth * 11fcf5ef2aSThomas Huth * This program is distributed in the hope that it will be useful, 12fcf5ef2aSThomas Huth * but WITHOUT ANY WARRANTY; without even the implied warranty of 13fcf5ef2aSThomas Huth * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14fcf5ef2aSThomas Huth * GNU General Public License for more details. 15fcf5ef2aSThomas Huth * 16fcf5ef2aSThomas Huth * You should have received a copy of the GNU General Public License 17fcf5ef2aSThomas Huth * along with this program; if not, see <http://www.gnu.org/licenses/>. 18fcf5ef2aSThomas Huth */ 19fcf5ef2aSThomas Huth 20fcf5ef2aSThomas Huth #include "qemu/osdep.h" 21fcf5ef2aSThomas Huth 22fcf5ef2aSThomas Huth #include "cpu.h" 2385b4fa0cSPeter Maydell #include "exec/gdbstub.h" 24fcf5ef2aSThomas Huth #if defined(CONFIG_USER_ONLY) 25fcf5ef2aSThomas Huth #include "qemu.h" 26fcf5ef2aSThomas Huth #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) 27fcf5ef2aSThomas Huth #else 28c89a14adSRichard Henderson #include "semihosting/softmmu-uaccess.h" 295601d241SPaolo Bonzini #include "hw/boards.h" 30fcf5ef2aSThomas Huth #endif 31fcf5ef2aSThomas Huth #include "qemu/log.h" 32fcf5ef2aSThomas Huth 33fcf5ef2aSThomas Huth #define HOSTED_EXIT 0 34fcf5ef2aSThomas Huth #define HOSTED_INIT_SIM 1 35fcf5ef2aSThomas Huth #define HOSTED_OPEN 2 36fcf5ef2aSThomas Huth #define HOSTED_CLOSE 3 37fcf5ef2aSThomas Huth #define HOSTED_READ 4 38fcf5ef2aSThomas Huth #define HOSTED_WRITE 5 39fcf5ef2aSThomas Huth #define HOSTED_LSEEK 6 40fcf5ef2aSThomas Huth #define HOSTED_RENAME 7 41fcf5ef2aSThomas Huth #define HOSTED_UNLINK 8 42fcf5ef2aSThomas Huth #define HOSTED_STAT 9 43fcf5ef2aSThomas Huth #define HOSTED_FSTAT 10 44fcf5ef2aSThomas Huth #define HOSTED_GETTIMEOFDAY 11 45fcf5ef2aSThomas Huth #define HOSTED_ISATTY 12 46fcf5ef2aSThomas Huth #define HOSTED_SYSTEM 13 47fcf5ef2aSThomas Huth 48fcf5ef2aSThomas Huth static int translate_openflags(int flags) 49fcf5ef2aSThomas Huth { 50fcf5ef2aSThomas Huth int hf; 51fcf5ef2aSThomas Huth 52fcf5ef2aSThomas Huth if (flags & GDB_O_WRONLY) 53fcf5ef2aSThomas Huth hf = O_WRONLY; 54fcf5ef2aSThomas Huth else if (flags & GDB_O_RDWR) 55fcf5ef2aSThomas Huth hf = O_RDWR; 56fcf5ef2aSThomas Huth else 57fcf5ef2aSThomas Huth hf = O_RDONLY; 58fcf5ef2aSThomas Huth 59fcf5ef2aSThomas Huth if (flags & GDB_O_APPEND) hf |= O_APPEND; 60fcf5ef2aSThomas Huth if (flags & GDB_O_CREAT) hf |= O_CREAT; 61fcf5ef2aSThomas Huth if (flags & GDB_O_TRUNC) hf |= O_TRUNC; 62fcf5ef2aSThomas Huth if (flags & GDB_O_EXCL) hf |= O_EXCL; 63fcf5ef2aSThomas Huth 64fcf5ef2aSThomas Huth return hf; 65fcf5ef2aSThomas Huth } 66fcf5ef2aSThomas Huth 67fcf5ef2aSThomas Huth static void translate_stat(CPUM68KState *env, target_ulong addr, struct stat *s) 68fcf5ef2aSThomas Huth { 697c56c2d3SRichard Henderson struct gdb_stat *p; 70fcf5ef2aSThomas Huth 717c56c2d3SRichard Henderson p = lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0); 727c56c2d3SRichard Henderson if (!p) { 73fcf5ef2aSThomas Huth /* FIXME - should this return an error code? */ 74fcf5ef2aSThomas Huth return; 757c56c2d3SRichard Henderson } 76fcf5ef2aSThomas Huth p->gdb_st_dev = cpu_to_be32(s->st_dev); 77fcf5ef2aSThomas Huth p->gdb_st_ino = cpu_to_be32(s->st_ino); 78fcf5ef2aSThomas Huth p->gdb_st_mode = cpu_to_be32(s->st_mode); 79fcf5ef2aSThomas Huth p->gdb_st_nlink = cpu_to_be32(s->st_nlink); 80fcf5ef2aSThomas Huth p->gdb_st_uid = cpu_to_be32(s->st_uid); 81fcf5ef2aSThomas Huth p->gdb_st_gid = cpu_to_be32(s->st_gid); 82fcf5ef2aSThomas Huth p->gdb_st_rdev = cpu_to_be32(s->st_rdev); 83fcf5ef2aSThomas Huth p->gdb_st_size = cpu_to_be64(s->st_size); 84fcf5ef2aSThomas Huth #ifdef _WIN32 85fcf5ef2aSThomas Huth /* Windows stat is missing some fields. */ 86fcf5ef2aSThomas Huth p->gdb_st_blksize = 0; 87fcf5ef2aSThomas Huth p->gdb_st_blocks = 0; 88fcf5ef2aSThomas Huth #else 89fcf5ef2aSThomas Huth p->gdb_st_blksize = cpu_to_be64(s->st_blksize); 90fcf5ef2aSThomas Huth p->gdb_st_blocks = cpu_to_be64(s->st_blocks); 91fcf5ef2aSThomas Huth #endif 92fcf5ef2aSThomas Huth p->gdb_st_atime = cpu_to_be32(s->st_atime); 93fcf5ef2aSThomas Huth p->gdb_st_mtime = cpu_to_be32(s->st_mtime); 94fcf5ef2aSThomas Huth p->gdb_st_ctime = cpu_to_be32(s->st_ctime); 957c56c2d3SRichard Henderson unlock_user(p, addr, sizeof(struct gdb_stat)); 96fcf5ef2aSThomas Huth } 97fcf5ef2aSThomas Huth 98ab294b6cSRichard Henderson static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err) 99fcf5ef2aSThomas Huth { 100ab294b6cSRichard Henderson M68kCPU *cpu = M68K_CPU(cs); 101ab294b6cSRichard Henderson CPUM68KState *env = &cpu->env; 102ab294b6cSRichard Henderson 103fcf5ef2aSThomas Huth target_ulong args = env->dregs[1]; 104fcf5ef2aSThomas Huth if (put_user_u32(ret, args) || 105fcf5ef2aSThomas Huth put_user_u32(err, args + 4)) { 106808d77bcSLucien Murray-Pitts /* 107808d77bcSLucien Murray-Pitts * The m68k semihosting ABI does not provide any way to report this 108fcf5ef2aSThomas Huth * error to the guest, so the best we can do is log it in qemu. 109fcf5ef2aSThomas Huth * It is always a guest error not to pass us a valid argument block. 110fcf5ef2aSThomas Huth */ 111fcf5ef2aSThomas Huth qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value " 112fcf5ef2aSThomas Huth "discarded because argument block not writable\n"); 113fcf5ef2aSThomas Huth } 114fcf5ef2aSThomas Huth } 115fcf5ef2aSThomas Huth 116ab294b6cSRichard Henderson static void m68k_semi_u64_cb(CPUState *cs, uint64_t ret, int err) 117fcf5ef2aSThomas Huth { 118ab294b6cSRichard Henderson M68kCPU *cpu = M68K_CPU(cs); 119ab294b6cSRichard Henderson CPUM68KState *env = &cpu->env; 120ab294b6cSRichard Henderson 121fcf5ef2aSThomas Huth target_ulong args = env->dregs[1]; 122fcf5ef2aSThomas Huth if (put_user_u32(ret >> 32, args) || 123fcf5ef2aSThomas Huth put_user_u32(ret, args + 4) || 124fcf5ef2aSThomas Huth put_user_u32(err, args + 8)) { 125fcf5ef2aSThomas Huth /* No way to report this via m68k semihosting ABI; just log it */ 126fcf5ef2aSThomas Huth qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value " 127fcf5ef2aSThomas Huth "discarded because argument block not writable\n"); 128fcf5ef2aSThomas Huth } 129fcf5ef2aSThomas Huth } 130fcf5ef2aSThomas Huth 131808d77bcSLucien Murray-Pitts /* 132808d77bcSLucien Murray-Pitts * Read the input value from the argument block; fail the semihosting 133fcf5ef2aSThomas Huth * call if the memory read fails. 134fcf5ef2aSThomas Huth */ 135fcf5ef2aSThomas Huth #define GET_ARG(n) do { \ 136fcf5ef2aSThomas Huth if (get_user_ual(arg ## n, args + (n) * 4)) { \ 137fcf5ef2aSThomas Huth result = -1; \ 138fcf5ef2aSThomas Huth errno = EFAULT; \ 139fcf5ef2aSThomas Huth goto failed; \ 140fcf5ef2aSThomas Huth } \ 141fcf5ef2aSThomas Huth } while (0) 142fcf5ef2aSThomas Huth 143fcf5ef2aSThomas Huth void do_m68k_semihosting(CPUM68KState *env, int nr) 144fcf5ef2aSThomas Huth { 145ab294b6cSRichard Henderson CPUState *cs = env_cpu(env); 146fcf5ef2aSThomas Huth uint32_t args; 147fcf5ef2aSThomas Huth target_ulong arg0, arg1, arg2, arg3; 148fcf5ef2aSThomas Huth void *p; 149fcf5ef2aSThomas Huth void *q; 150fcf5ef2aSThomas Huth uint32_t len; 151fcf5ef2aSThomas Huth uint32_t result; 152fcf5ef2aSThomas Huth 153fcf5ef2aSThomas Huth args = env->dregs[1]; 154fcf5ef2aSThomas Huth switch (nr) { 155fcf5ef2aSThomas Huth case HOSTED_EXIT: 156ad9dcb20SAlex Bennée gdb_exit(env->dregs[0]); 157fcf5ef2aSThomas Huth exit(env->dregs[0]); 158fcf5ef2aSThomas Huth case HOSTED_OPEN: 159fcf5ef2aSThomas Huth GET_ARG(0); 160fcf5ef2aSThomas Huth GET_ARG(1); 161fcf5ef2aSThomas Huth GET_ARG(2); 162fcf5ef2aSThomas Huth GET_ARG(3); 163fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 164ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1, 165fcf5ef2aSThomas Huth arg2, arg3); 166fcf5ef2aSThomas Huth return; 167fcf5ef2aSThomas Huth } else { 168fcf5ef2aSThomas Huth p = lock_user_string(arg0); 169fcf5ef2aSThomas Huth if (!p) { 170fcf5ef2aSThomas Huth /* FIXME - check error code? */ 171fcf5ef2aSThomas Huth result = -1; 172fcf5ef2aSThomas Huth } else { 173fcf5ef2aSThomas Huth result = open(p, translate_openflags(arg2), arg3); 174fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 175fcf5ef2aSThomas Huth } 176fcf5ef2aSThomas Huth } 177fcf5ef2aSThomas Huth break; 178fcf5ef2aSThomas Huth case HOSTED_CLOSE: 179fcf5ef2aSThomas Huth { 180fcf5ef2aSThomas Huth /* Ignore attempts to close stdin/out/err. */ 181fcf5ef2aSThomas Huth GET_ARG(0); 182fcf5ef2aSThomas Huth int fd = arg0; 183fcf5ef2aSThomas Huth if (fd > 2) { 184fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 185ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "close,%x", arg0); 186fcf5ef2aSThomas Huth return; 187fcf5ef2aSThomas Huth } else { 188fcf5ef2aSThomas Huth result = close(fd); 189fcf5ef2aSThomas Huth } 190fcf5ef2aSThomas Huth } else { 191fcf5ef2aSThomas Huth result = 0; 192fcf5ef2aSThomas Huth } 193fcf5ef2aSThomas Huth break; 194fcf5ef2aSThomas Huth } 195fcf5ef2aSThomas Huth case HOSTED_READ: 196fcf5ef2aSThomas Huth GET_ARG(0); 197fcf5ef2aSThomas Huth GET_ARG(1); 198fcf5ef2aSThomas Huth GET_ARG(2); 199fcf5ef2aSThomas Huth len = arg2; 200fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 201ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "read,%x,%x,%x", 202fcf5ef2aSThomas Huth arg0, arg1, len); 203fcf5ef2aSThomas Huth return; 204fcf5ef2aSThomas Huth } else { 205fcf5ef2aSThomas Huth p = lock_user(VERIFY_WRITE, arg1, len, 0); 206fcf5ef2aSThomas Huth if (!p) { 207fcf5ef2aSThomas Huth /* FIXME - check error code? */ 208fcf5ef2aSThomas Huth result = -1; 209fcf5ef2aSThomas Huth } else { 210fcf5ef2aSThomas Huth result = read(arg0, p, len); 211fcf5ef2aSThomas Huth unlock_user(p, arg1, len); 212fcf5ef2aSThomas Huth } 213fcf5ef2aSThomas Huth } 214fcf5ef2aSThomas Huth break; 215fcf5ef2aSThomas Huth case HOSTED_WRITE: 216fcf5ef2aSThomas Huth GET_ARG(0); 217fcf5ef2aSThomas Huth GET_ARG(1); 218fcf5ef2aSThomas Huth GET_ARG(2); 219fcf5ef2aSThomas Huth len = arg2; 220fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 221ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "write,%x,%x,%x", 222fcf5ef2aSThomas Huth arg0, arg1, len); 223fcf5ef2aSThomas Huth return; 224fcf5ef2aSThomas Huth } else { 225fcf5ef2aSThomas Huth p = lock_user(VERIFY_READ, arg1, len, 1); 226fcf5ef2aSThomas Huth if (!p) { 227fcf5ef2aSThomas Huth /* FIXME - check error code? */ 228fcf5ef2aSThomas Huth result = -1; 229fcf5ef2aSThomas Huth } else { 230fcf5ef2aSThomas Huth result = write(arg0, p, len); 231fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 232fcf5ef2aSThomas Huth } 233fcf5ef2aSThomas Huth } 234fcf5ef2aSThomas Huth break; 235fcf5ef2aSThomas Huth case HOSTED_LSEEK: 236fcf5ef2aSThomas Huth { 237fcf5ef2aSThomas Huth uint64_t off; 238fcf5ef2aSThomas Huth GET_ARG(0); 239fcf5ef2aSThomas Huth GET_ARG(1); 240fcf5ef2aSThomas Huth GET_ARG(2); 241fcf5ef2aSThomas Huth GET_ARG(3); 242fcf5ef2aSThomas Huth off = (uint32_t)arg2 | ((uint64_t)arg1 << 32); 243fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 244ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u64_cb, "fseek,%x,%lx,%x", 245fcf5ef2aSThomas Huth arg0, off, arg3); 246fcf5ef2aSThomas Huth } else { 247fcf5ef2aSThomas Huth off = lseek(arg0, off, arg3); 248ab294b6cSRichard Henderson m68k_semi_u64_cb(cs, off, errno); 249fcf5ef2aSThomas Huth } 250fcf5ef2aSThomas Huth return; 251fcf5ef2aSThomas Huth } 252fcf5ef2aSThomas Huth case HOSTED_RENAME: 253fcf5ef2aSThomas Huth GET_ARG(0); 254fcf5ef2aSThomas Huth GET_ARG(1); 255fcf5ef2aSThomas Huth GET_ARG(2); 256fcf5ef2aSThomas Huth GET_ARG(3); 257fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 258ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "rename,%s,%s", 259fcf5ef2aSThomas Huth arg0, (int)arg1, arg2, (int)arg3); 260fcf5ef2aSThomas Huth return; 261fcf5ef2aSThomas Huth } else { 262fcf5ef2aSThomas Huth p = lock_user_string(arg0); 263fcf5ef2aSThomas Huth q = lock_user_string(arg2); 264fcf5ef2aSThomas Huth if (!p || !q) { 265fcf5ef2aSThomas Huth /* FIXME - check error code? */ 266fcf5ef2aSThomas Huth result = -1; 267fcf5ef2aSThomas Huth } else { 268fcf5ef2aSThomas Huth result = rename(p, q); 269fcf5ef2aSThomas Huth } 270fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 271fcf5ef2aSThomas Huth unlock_user(q, arg2, 0); 272fcf5ef2aSThomas Huth } 273fcf5ef2aSThomas Huth break; 274fcf5ef2aSThomas Huth case HOSTED_UNLINK: 275fcf5ef2aSThomas Huth GET_ARG(0); 276fcf5ef2aSThomas Huth GET_ARG(1); 277fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 278ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "unlink,%s", 279fcf5ef2aSThomas Huth arg0, (int)arg1); 280fcf5ef2aSThomas Huth return; 281fcf5ef2aSThomas Huth } else { 282fcf5ef2aSThomas Huth p = lock_user_string(arg0); 283fcf5ef2aSThomas Huth if (!p) { 284fcf5ef2aSThomas Huth /* FIXME - check error code? */ 285fcf5ef2aSThomas Huth result = -1; 286fcf5ef2aSThomas Huth } else { 287fcf5ef2aSThomas Huth result = unlink(p); 288fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 289fcf5ef2aSThomas Huth } 290fcf5ef2aSThomas Huth } 291fcf5ef2aSThomas Huth break; 292fcf5ef2aSThomas Huth case HOSTED_STAT: 293fcf5ef2aSThomas Huth GET_ARG(0); 294fcf5ef2aSThomas Huth GET_ARG(1); 295fcf5ef2aSThomas Huth GET_ARG(2); 296fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 297ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "stat,%s,%x", 298fcf5ef2aSThomas Huth arg0, (int)arg1, arg2); 299fcf5ef2aSThomas Huth return; 300fcf5ef2aSThomas Huth } else { 301fcf5ef2aSThomas Huth struct stat s; 302fcf5ef2aSThomas Huth p = lock_user_string(arg0); 303fcf5ef2aSThomas Huth if (!p) { 304fcf5ef2aSThomas Huth /* FIXME - check error code? */ 305fcf5ef2aSThomas Huth result = -1; 306fcf5ef2aSThomas Huth } else { 307fcf5ef2aSThomas Huth result = stat(p, &s); 308fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 309fcf5ef2aSThomas Huth } 310fcf5ef2aSThomas Huth if (result == 0) { 311fcf5ef2aSThomas Huth translate_stat(env, arg2, &s); 312fcf5ef2aSThomas Huth } 313fcf5ef2aSThomas Huth } 314fcf5ef2aSThomas Huth break; 315fcf5ef2aSThomas Huth case HOSTED_FSTAT: 316fcf5ef2aSThomas Huth GET_ARG(0); 317fcf5ef2aSThomas Huth GET_ARG(1); 318fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 319ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "fstat,%x,%x", 320fcf5ef2aSThomas Huth arg0, arg1); 321fcf5ef2aSThomas Huth return; 322fcf5ef2aSThomas Huth } else { 323fcf5ef2aSThomas Huth struct stat s; 324fcf5ef2aSThomas Huth result = fstat(arg0, &s); 325fcf5ef2aSThomas Huth if (result == 0) { 326fcf5ef2aSThomas Huth translate_stat(env, arg1, &s); 327fcf5ef2aSThomas Huth } 328fcf5ef2aSThomas Huth } 329fcf5ef2aSThomas Huth break; 330fcf5ef2aSThomas Huth case HOSTED_GETTIMEOFDAY: 331fcf5ef2aSThomas Huth GET_ARG(0); 332fcf5ef2aSThomas Huth GET_ARG(1); 333fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 334ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "gettimeofday,%x,%x", 335fcf5ef2aSThomas Huth arg0, arg1); 336fcf5ef2aSThomas Huth return; 337fcf5ef2aSThomas Huth } else { 338fcf5ef2aSThomas Huth struct gdb_timeval *p; 339f793dde0SMarc-André Lureau int64_t rt = g_get_real_time(); 340f793dde0SMarc-André Lureau p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0); 341f793dde0SMarc-André Lureau if (!p) { 342fcf5ef2aSThomas Huth /* FIXME - check error code? */ 343fcf5ef2aSThomas Huth result = -1; 344fcf5ef2aSThomas Huth } else { 345f793dde0SMarc-André Lureau result = 0; 346f793dde0SMarc-André Lureau p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC); 347f793dde0SMarc-André Lureau p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC); 348fcf5ef2aSThomas Huth unlock_user(p, arg0, sizeof(struct gdb_timeval)); 349fcf5ef2aSThomas Huth } 350fcf5ef2aSThomas Huth } 351fcf5ef2aSThomas Huth break; 352fcf5ef2aSThomas Huth case HOSTED_ISATTY: 353fcf5ef2aSThomas Huth GET_ARG(0); 354fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 355ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "isatty,%x", arg0); 356fcf5ef2aSThomas Huth return; 357fcf5ef2aSThomas Huth } else { 358fcf5ef2aSThomas Huth result = isatty(arg0); 359fcf5ef2aSThomas Huth } 360fcf5ef2aSThomas Huth break; 361fcf5ef2aSThomas Huth case HOSTED_SYSTEM: 362fcf5ef2aSThomas Huth GET_ARG(0); 363fcf5ef2aSThomas Huth GET_ARG(1); 364fcf5ef2aSThomas Huth if (use_gdb_syscalls()) { 365ab294b6cSRichard Henderson gdb_do_syscall(m68k_semi_u32_cb, "system,%s", 366fcf5ef2aSThomas Huth arg0, (int)arg1); 367fcf5ef2aSThomas Huth return; 368fcf5ef2aSThomas Huth } else { 369fcf5ef2aSThomas Huth p = lock_user_string(arg0); 370fcf5ef2aSThomas Huth if (!p) { 371fcf5ef2aSThomas Huth /* FIXME - check error code? */ 372fcf5ef2aSThomas Huth result = -1; 373fcf5ef2aSThomas Huth } else { 374fcf5ef2aSThomas Huth result = system(p); 375fcf5ef2aSThomas Huth unlock_user(p, arg0, 0); 376fcf5ef2aSThomas Huth } 377fcf5ef2aSThomas Huth } 378fcf5ef2aSThomas Huth break; 379fcf5ef2aSThomas Huth case HOSTED_INIT_SIM: 380fcf5ef2aSThomas Huth #if defined(CONFIG_USER_ONLY) 381fcf5ef2aSThomas Huth { 382a8d92fd8SRichard Henderson CPUState *cs = env_cpu(env); 383fcf5ef2aSThomas Huth TaskState *ts = cs->opaque; 384fcf5ef2aSThomas Huth /* Allocate the heap using sbrk. */ 385fcf5ef2aSThomas Huth if (!ts->heap_limit) { 386fcf5ef2aSThomas Huth abi_ulong ret; 387fcf5ef2aSThomas Huth uint32_t size; 388fcf5ef2aSThomas Huth uint32_t base; 389fcf5ef2aSThomas Huth 390fcf5ef2aSThomas Huth base = do_brk(0); 391fcf5ef2aSThomas Huth size = SEMIHOSTING_HEAP_SIZE; 392fcf5ef2aSThomas Huth /* Try a big heap, and reduce the size if that fails. */ 393fcf5ef2aSThomas Huth for (;;) { 394fcf5ef2aSThomas Huth ret = do_brk(base + size); 395fcf5ef2aSThomas Huth if (ret >= (base + size)) { 396fcf5ef2aSThomas Huth break; 397fcf5ef2aSThomas Huth } 398fcf5ef2aSThomas Huth size >>= 1; 399fcf5ef2aSThomas Huth } 400fcf5ef2aSThomas Huth ts->heap_limit = base + size; 401fcf5ef2aSThomas Huth } 402808d77bcSLucien Murray-Pitts /* 403808d77bcSLucien Murray-Pitts * This call may happen before we have writable memory, so return 404808d77bcSLucien Murray-Pitts * values directly in registers. 405808d77bcSLucien Murray-Pitts */ 406fcf5ef2aSThomas Huth env->dregs[1] = ts->heap_limit; 407fcf5ef2aSThomas Huth env->aregs[7] = ts->stack_base; 408fcf5ef2aSThomas Huth } 409fcf5ef2aSThomas Huth #else 410808d77bcSLucien Murray-Pitts /* 411808d77bcSLucien Murray-Pitts * FIXME: This is wrong for boards where RAM does not start at 412808d77bcSLucien Murray-Pitts * address zero. 413808d77bcSLucien Murray-Pitts */ 4145601d241SPaolo Bonzini env->dregs[1] = current_machine->ram_size; 4155601d241SPaolo Bonzini env->aregs[7] = current_machine->ram_size; 416fcf5ef2aSThomas Huth #endif 417fcf5ef2aSThomas Huth return; 418fcf5ef2aSThomas Huth default: 419a8d92fd8SRichard Henderson cpu_abort(env_cpu(env), "Unsupported semihosting syscall %d\n", nr); 420fcf5ef2aSThomas Huth result = 0; 421fcf5ef2aSThomas Huth } 422fcf5ef2aSThomas Huth failed: 423ab294b6cSRichard Henderson m68k_semi_u32_cb(cs, result, errno); 424fcf5ef2aSThomas Huth } 425