root / linux-user / m68k-sim.c @ e0c8a796
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/*
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* m68k simulator syscall interface
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*
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* Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <time.h> |
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#include "qemu.h" |
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#define SYS_EXIT 1 |
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#define SYS_READ 3 |
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#define SYS_WRITE 4 |
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#define SYS_OPEN 5 |
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#define SYS_CLOSE 6 |
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#define SYS_BRK 17 |
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#define SYS_FSTAT 28 |
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#define SYS_ISATTY 29 |
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#define SYS_LSEEK 199 |
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struct m68k_sim_stat {
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uint16_t sim_st_dev; |
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uint16_t sim_st_ino; |
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uint32_t sim_st_mode; |
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uint16_t sim_st_nlink; |
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uint16_t sim_st_uid; |
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uint16_t sim_st_gid; |
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uint16_t sim_st_rdev; |
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uint32_t sim_st_size; |
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uint32_t sim_st_atime; |
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uint32_t sim_st_mtime; |
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uint32_t sim_st_ctime; |
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uint32_t sim_st_blksize; |
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uint32_t sim_st_blocks; |
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}; |
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static inline uint32_t check_err(CPUM68KState *env, uint32_t code) |
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{ |
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env->dregs[0] = code;
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if (code == (uint32_t)-1) { |
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env->dregs[1] = errno;
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} else {
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env->dregs[1] = 0; |
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} |
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return code;
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} |
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#define SIM_O_APPEND 0x0008 |
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#define SIM_O_CREAT 0x0200 |
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#define SIM_O_TRUNC 0x0400 |
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#define SIM_O_EXCL 0x0800 |
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#define SIM_O_NONBLOCK 0x4000 |
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#define SIM_O_NOCTTY 0x8000 |
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#define SIM_O_SYNC 0x2000 |
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static int translate_openflags(int flags) |
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{ |
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int hf;
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switch (flags & 3) { |
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case 0: hf = O_RDONLY; break; |
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case 1: hf = O_WRONLY; break; |
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case 2: hf = O_RDWR; break; |
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default: hf = O_RDWR; break; |
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} |
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if (flags & SIM_O_APPEND) hf |= O_APPEND;
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if (flags & SIM_O_CREAT) hf |= O_CREAT;
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if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
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if (flags & SIM_O_EXCL) hf |= O_EXCL;
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if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
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if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
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if (flags & SIM_O_SYNC) hf |= O_SYNC;
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return hf;
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} |
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#define ARG(x) tswap32(args[x])
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void do_m68k_simcall(CPUM68KState *env, int nr) |
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{ |
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uint32_t *args; |
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args = (uint32_t *)(unsigned long)(env->aregs[7] + 4); |
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switch (nr) {
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case SYS_EXIT:
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exit(ARG(0));
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case SYS_READ:
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check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2))); |
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break;
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case SYS_WRITE:
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check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2))); |
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break;
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case SYS_OPEN:
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check_err(env, open((char *)(unsigned long)ARG(0), |
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translate_openflags(ARG(1)), ARG(2))); |
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break;
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case SYS_CLOSE:
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{ |
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/* Ignore attempts to close stdin/out/err. */
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int fd = ARG(0); |
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if (fd > 2) |
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check_err(env, close(fd)); |
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else
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check_err(env, 0);
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break;
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} |
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case SYS_BRK:
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{ |
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int32_t ret; |
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ret = do_brk((abi_ulong)ARG(0));
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if (ret == -ENOMEM)
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ret = -1;
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check_err(env, ret); |
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} |
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break;
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case SYS_FSTAT:
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{ |
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struct stat s;
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int rc;
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struct m68k_sim_stat *p;
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rc = check_err(env, fstat(ARG(0), &s));
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if (rc == 0) { |
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p = (struct m68k_sim_stat *)(unsigned long)ARG(1); |
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p->sim_st_dev = tswap16(s.st_dev); |
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p->sim_st_ino = tswap16(s.st_ino); |
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p->sim_st_mode = tswap32(s.st_mode); |
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p->sim_st_nlink = tswap16(s.st_nlink); |
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p->sim_st_uid = tswap16(s.st_uid); |
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p->sim_st_gid = tswap16(s.st_gid); |
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p->sim_st_rdev = tswap16(s.st_rdev); |
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p->sim_st_size = tswap32(s.st_size); |
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p->sim_st_atime = tswap32(s.st_atime); |
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p->sim_st_mtime = tswap32(s.st_mtime); |
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p->sim_st_ctime = tswap32(s.st_ctime); |
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p->sim_st_blksize = tswap32(s.st_blksize); |
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p->sim_st_blocks = tswap32(s.st_blocks); |
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} |
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} |
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break;
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case SYS_ISATTY:
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check_err(env, isatty(ARG(0)));
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break;
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case SYS_LSEEK:
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check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2))); |
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break;
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default:
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cpu_abort(env, "Unsupported m68k sim syscall %d\n", nr);
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} |
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} |