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Annotation of qemu/linux-user/m68k-sim.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  m68k simulator syscall interface
        !             3:  * 
        !             4:  *  Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
        !             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, write to the Free Software
        !            18:  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            19:  */
        !            20: 
        !            21: #include <sys/types.h>
        !            22: #include <sys/stat.h>
        !            23: #include <errno.h>
        !            24: #include <fcntl.h>
        !            25: #include <unistd.h>
        !            26: #include <stdlib.h>
        !            27: #include <stdio.h>
        !            28: #include <time.h>
        !            29: 
        !            30: #include "qemu.h"
        !            31: 
        !            32: #define SYS_EXIT        1
        !            33: #define SYS_READ        3
        !            34: #define SYS_WRITE       4
        !            35: #define SYS_OPEN        5
        !            36: #define SYS_CLOSE       6
        !            37: #define SYS_BRK         17
        !            38: #define SYS_FSTAT       28
        !            39: #define SYS_ISATTY      29
        !            40: #define SYS_LSEEK       199
        !            41: 
        !            42: struct m86k_sim_stat {
        !            43:     uint16_t sim_st_dev;
        !            44:     uint16_t sim_st_ino;
        !            45:     uint32_t sim_st_mode;
        !            46:     uint16_t sim_st_nlink;
        !            47:     uint16_t sim_st_uid;
        !            48:     uint16_t sim_st_gid;
        !            49:     uint16_t sim_st_rdev;
        !            50:     uint32_t sim_st_size;
        !            51:     uint32_t sim_st_atime;
        !            52:     uint32_t sim_st_mtime;
        !            53:     uint32_t sim_st_ctime;
        !            54:     uint32_t sim_st_blksize;
        !            55:     uint32_t sim_st_blocks;
        !            56: };
        !            57: 
        !            58: static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
        !            59: {
        !            60:   env->dregs[0] = code;
        !            61:   if (code == (uint32_t)-1) {
        !            62:       env->dregs[1] = errno;
        !            63:   } else {
        !            64:       env->dregs[1] = 0;
        !            65:   }
        !            66:   return code;
        !            67: }
        !            68: 
        !            69: #define SIM_O_APPEND    0x0008
        !            70: #define SIM_O_CREAT     0x0200
        !            71: #define SIM_O_TRUNC     0x0400
        !            72: #define SIM_O_EXCL      0x0800
        !            73: #define SIM_O_NONBLOCK  0x4000
        !            74: #define SIM_O_NOCTTY    0x8000
        !            75: #define SIM_O_SYNC      0x2000
        !            76: 
        !            77: static int translate_openflags(int flags)
        !            78: {
        !            79:     int hf;
        !            80: 
        !            81:     switch (flags & 3) {
        !            82:     case 0: hf = O_RDONLY; break;
        !            83:     case 1: hf = O_WRONLY; break;
        !            84:     case 2: hf = O_RDWR; break;
        !            85:     default: hf = O_RDWR; break;
        !            86:     }
        !            87: 
        !            88:     if (flags & SIM_O_APPEND) hf |= O_APPEND;
        !            89:     if (flags & SIM_O_CREAT) hf |= O_CREAT;
        !            90:     if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
        !            91:     if (flags & SIM_O_EXCL) hf |= O_EXCL;
        !            92:     if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
        !            93:     if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
        !            94:     if (flags & SIM_O_SYNC) hf |= O_SYNC;
        !            95: 
        !            96:     return hf;
        !            97: }
        !            98: 
        !            99: #define ARG(x) tswap32(args[x])
        !           100: void do_m68k_simcall(CPUM68KState *env, int nr)
        !           101: {
        !           102:     uint32_t *args;
        !           103: 
        !           104:     args = (uint32_t *)(env->aregs[7] + 4);
        !           105:     switch (nr) {
        !           106:     case SYS_EXIT:
        !           107:         exit(ARG(0));
        !           108:     case SYS_READ:
        !           109:         check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
        !           110:         break;
        !           111:     case SYS_WRITE:
        !           112:         check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
        !           113:         break;
        !           114:     case SYS_OPEN:
        !           115:         check_err(env, open((char *)ARG(0), translate_openflags(ARG(1)),
        !           116:                             ARG(2)));
        !           117:         break;
        !           118:     case SYS_CLOSE:
        !           119:         {
        !           120:             /* Ignore attempts to close stdin/out/err.  */
        !           121:             int fd = ARG(0);
        !           122:             if (fd > 2)
        !           123:               check_err(env, close(fd));
        !           124:             else
        !           125:               check_err(env, 0);
        !           126:             break;
        !           127:         }
        !           128:     case SYS_BRK:
        !           129:         {
        !           130:             int32_t ret;
        !           131: 
        !           132:             ret = do_brk((void *)ARG(0));
        !           133:             if (ret == -ENOMEM)
        !           134:                 ret = -1;
        !           135:             check_err(env, ret);
        !           136:         }
        !           137:         break;
        !           138:     case SYS_FSTAT:
        !           139:         {
        !           140:             struct stat s;
        !           141:             int rc;
        !           142:             struct m86k_sim_stat *p;
        !           143:             rc = check_err(env, fstat(ARG(0), &s));
        !           144:             if (rc == 0) {
        !           145:                 p = (struct m86k_sim_stat *)ARG(1);
        !           146:                 p->sim_st_dev = tswap16(s.st_dev);
        !           147:                 p->sim_st_ino = tswap16(s.st_ino);
        !           148:                 p->sim_st_mode = tswap32(s.st_mode);
        !           149:                 p->sim_st_nlink = tswap16(s.st_nlink);
        !           150:                 p->sim_st_uid = tswap16(s.st_uid);
        !           151:                 p->sim_st_gid = tswap16(s.st_gid);
        !           152:                 p->sim_st_rdev = tswap16(s.st_rdev);
        !           153:                 p->sim_st_size = tswap32(s.st_size);
        !           154:                 p->sim_st_atime = tswap32(s.st_atime);
        !           155:                 p->sim_st_mtime = tswap32(s.st_mtime);
        !           156:                 p->sim_st_ctime = tswap32(s.st_ctime);
        !           157:                 p->sim_st_blksize = tswap32(s.st_blksize);
        !           158:                 p->sim_st_blocks = tswap32(s.st_blocks);
        !           159:             }
        !           160:         }
        !           161:         break;
        !           162:     case SYS_ISATTY:
        !           163:         check_err(env, isatty(ARG(0)));
        !           164:         break;
        !           165:     case SYS_LSEEK:
        !           166:         check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
        !           167:         break;
        !           168:     default:
        !           169:         cpu_abort(env, "Unsupported m68k sim syscall %d\n", nr);
        !           170:     }
        !           171: }

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