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* simops.c: Don't lose the upper 24 bits of the return
pointer in "call" and "calls" instructions. Rough cut
at emulated system calls.
This commit is contained in:
Jeff Law
parent
caeea0b47b
commit
3bb3fe44e0
@ -1,5 +1,9 @@
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Wed Nov 27 09:20:42 1996 Jeffrey A Law (law@cygnus.com)
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* simops.c: Don't lose the upper 24 bits of the return
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pointer in "call" and "calls" instructions. Rough cut
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at emulated system calls.
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* simops.c: Implement the remaining 5, 6 and 7 byte instructions.
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* simops.c: Implement remaining 4 byte instructions.
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@ -2367,9 +2367,9 @@ void OP_CD000000 ()
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sp = State.regs[REG_SP];
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next_pc = State.pc + 2;
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State.mem[sp] = next_pc & 0xff;
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State.mem[sp+1] = next_pc & 0xff00;
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State.mem[sp+2] = next_pc & 0xff0000;
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State.mem[sp+3] = next_pc & 0xff000000;
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State.mem[sp+1] = (next_pc & 0xff00) >> 8;
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State.mem[sp+2] = (next_pc & 0xff0000) >> 16;
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State.mem[sp+3] = (next_pc & 0xff000000) >> 24;
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mask = insn & 0xff;
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@ -2432,9 +2432,9 @@ void OP_DD000000 ()
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sp = State.regs[REG_SP];
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next_pc = State.pc + 2;
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State.mem[sp] = next_pc & 0xff;
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State.mem[sp+1] = next_pc & 0xff00;
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State.mem[sp+2] = next_pc & 0xff0000;
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State.mem[sp+3] = next_pc & 0xff000000;
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State.mem[sp+1] = (next_pc & 0xff00) >> 8;
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State.mem[sp+2] = (next_pc & 0xff0000) >> 16;
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State.mem[sp+3] = (next_pc & 0xff000000) >> 24;
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mask = (extension & 0xff00) >> 8;
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@ -2496,9 +2496,9 @@ void OP_F0F0 ()
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sp = State.regs[REG_SP];
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next_pc = State.pc + 2;
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State.mem[sp] = next_pc & 0xff;
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State.mem[sp+1] = next_pc & 0xff00;
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State.mem[sp+2] = next_pc & 0xff0000;
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State.mem[sp+3] = next_pc & 0xff000000;
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State.mem[sp+1] = (next_pc & 0xff00) >> 8;
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State.mem[sp+2] = (next_pc & 0xff0000) >> 16;
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State.mem[sp+3] = (next_pc & 0xff000000) >> 24;
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State.regs[REG_MDR] = next_pc;
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State.pc = State.regs[REG_A0 + (insn & 0x3)] - 2;
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}
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@ -2511,9 +2511,9 @@ void OP_FAFF0000 ()
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sp = State.regs[REG_SP];
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next_pc = State.pc + 4;
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State.mem[sp] = next_pc & 0xff;
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State.mem[sp+1] = next_pc & 0xff00;
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State.mem[sp+2] = next_pc & 0xff0000;
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State.mem[sp+3] = next_pc & 0xff000000;
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State.mem[sp+1] = (next_pc & 0xff00) >> 8;
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State.mem[sp+2] = (next_pc & 0xff0000) >> 16;
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State.mem[sp+3] = (next_pc & 0xff000000) >> 24;
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State.regs[REG_MDR] = next_pc;
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State.pc += SEXT16 (insn & 0xffff) - 4;
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}
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@ -2526,9 +2526,9 @@ void OP_FCFF0000 ()
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sp = State.regs[REG_SP];
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next_pc = State.pc + 6;
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State.mem[sp] = next_pc & 0xff;
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State.mem[sp+1] = next_pc & 0xff00;
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State.mem[sp+2] = next_pc & 0xff0000;
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State.mem[sp+3] = next_pc & 0xff000000;
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State.mem[sp+1] = (next_pc & 0xff00) >> 8;
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State.mem[sp+2] = (next_pc & 0xff0000) >> 16;
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State.mem[sp+3] = (next_pc & 0xff000000) >> 24;
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State.regs[REG_MDR] = next_pc;
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State.pc += (((insn & 0xffff) << 16) | extension) - 6;
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}
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@ -2668,7 +2668,141 @@ void OP_F0FD ()
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/* trap */
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void OP_F0FE ()
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{
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abort ();
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/* We use this for simulated system calls; we may need to change
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it to a reserved instruction if we conflict with uses at
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Matsushita. */
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int save_errno = errno;
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errno = 0;
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/* Registers passed to trap 0 */
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/* Function number. */
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#define FUNC (load_mem (State.regs[REG_SP] + 4, 4))
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/* Parameters. */
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#define PARM1 (load_mem (State.regs[REG_SP] + 8, 4))
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#define PARM2 (load_mem (State.regs[REG_SP] + 12, 4))
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#define PARM3 (load_mem (State.regs[REG_SP] + 16, 4))
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/* Registers set by trap 0 */
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#define RETVAL State.regs[0] /* return value */
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#define RETERR State.regs[1] /* return error code */
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/* Turn a pointer in a register into a pointer into real memory. */
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#define MEMPTR(x) (State.mem + x)
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switch (FUNC)
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{
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#if !defined(__GO32__) && !defined(_WIN32)
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case SYS_fork:
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RETVAL = fork ();
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break;
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case SYS_execve:
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RETVAL = execve (MEMPTR (PARM1), (char **) MEMPTR (PARM2),
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(char **)MEMPTR (PARM3));
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break;
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case SYS_execv:
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RETVAL = execve (MEMPTR (PARM1), (char **) MEMPTR (PARM2), NULL);
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break;
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#endif
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case SYS_read:
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RETVAL = mn10300_callback->read (mn10300_callback, PARM1,
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MEMPTR (PARM2), PARM3);
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break;
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case SYS_write:
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if (PARM1 == 1)
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RETVAL = (int)mn10300_callback->write_stdout (mn10300_callback,
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MEMPTR (PARM2), PARM3);
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else
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RETVAL = (int)mn10300_callback->write (mn10300_callback, PARM1,
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MEMPTR (PARM2), PARM3);
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break;
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case SYS_lseek:
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RETVAL = mn10300_callback->lseek (mn10300_callback, PARM1, PARM2, PARM3);
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break;
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case SYS_close:
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RETVAL = mn10300_callback->close (mn10300_callback, PARM1);
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break;
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case SYS_open:
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RETVAL = mn10300_callback->open (mn10300_callback, MEMPTR (PARM1), PARM2);
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break;
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case SYS_exit:
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/* EXIT - caller can look in PARM1 to work out the
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reason */
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if (PARM1 == 0xdead || PARM1 == 0x1)
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State.exception = SIGABRT;
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else
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State.exception = SIGQUIT;
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break;
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case SYS_stat: /* added at hmsi */
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/* stat system call */
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{
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struct stat host_stat;
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reg_t buf;
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RETVAL = stat (MEMPTR (PARM1), &host_stat);
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buf = PARM2;
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/* Just wild-assed guesses. */
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store_mem (buf, 2, host_stat.st_dev);
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store_mem (buf + 2, 2, host_stat.st_ino);
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store_mem (buf + 4, 4, host_stat.st_mode);
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store_mem (buf + 8, 2, host_stat.st_nlink);
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store_mem (buf + 10, 2, host_stat.st_uid);
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store_mem (buf + 12, 2, host_stat.st_gid);
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store_mem (buf + 14, 2, host_stat.st_rdev);
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store_mem (buf + 16, 4, host_stat.st_size);
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store_mem (buf + 20, 4, host_stat.st_atime);
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store_mem (buf + 28, 4, host_stat.st_mtime);
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store_mem (buf + 36, 4, host_stat.st_ctime);
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}
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break;
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case SYS_chown:
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RETVAL = chown (MEMPTR (PARM1), PARM2, PARM3);
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break;
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case SYS_chmod:
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RETVAL = chmod (MEMPTR (PARM1), PARM2);
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break;
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case SYS_time:
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RETVAL = time (MEMPTR (PARM1));
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break;
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case SYS_times:
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{
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struct tms tms;
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RETVAL = times (&tms);
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store_mem (PARM1, 4, tms.tms_utime);
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store_mem (PARM1 + 4, 4, tms.tms_stime);
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store_mem (PARM1 + 8, 4, tms.tms_cutime);
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store_mem (PARM1 + 12, 4, tms.tms_cstime);
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break;
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}
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case SYS_gettimeofday:
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{
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struct timeval t;
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struct timezone tz;
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RETVAL = gettimeofday (&t, &tz);
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store_mem (PARM1, 4, t.tv_sec);
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store_mem (PARM1 + 4, 4, t.tv_usec);
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store_mem (PARM2, 4, tz.tz_minuteswest);
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store_mem (PARM2 + 4, 4, tz.tz_dsttime);
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break;
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}
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case SYS_utime:
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/* Cast the second argument to void *, to avoid type mismatch
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if a prototype is present. */
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RETVAL = utime (MEMPTR (PARM1), (void *) MEMPTR (PARM2));
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break;
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default:
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abort ();
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}
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RETERR = errno;
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errno = save_errno;
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}
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/* rtm */
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