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Aminet 23
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Aminet 23 (1998)(GTI - Schatztruhe)[!][Feb 1998].iso
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Aminet
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misc
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emu
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amiSPIMsrc.lha
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mips-syscall.c
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C/C++ Source or Header
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1994-02-08
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/* SPIM S20 MIPS simulator.
Execute SPIM syscalls, both in simulator and bare mode.
Execute MIPS syscalls in bare mode, when running on MIPS systems.
Copyright (C) 1990-1994 by James Larus (larus@cs.wisc.edu).
ALL RIGHTS RESERVED.
Improved by Emin Gun Sirer.
SPIM is distributed under the following conditions:
You may make copies of SPIM for your own use and modify those copies.
All copies of SPIM must retain my name and copyright notice.
You may not sell SPIM or distributed SPIM in conjunction with a
commerical product or service without the expressed written consent of
James Larus.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. */
/* $Header: /home/primost/larus/Software/SPIM/RCS/mips-syscall.c,v 1.21 1994/01/18 03:21:45 larus Exp larus $ */
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#ifdef RS
/* This is problem on HP Snakes, which define RS in syscall.h */
#undef RS
#endif
#ifdef mips
#include <syscall.h>
#include <limits.h>
#endif
#include "spim.h"
#include "inst.h"
#include "mem.h"
#include "reg.h"
#include "read-aout.h"
#include "sym-tbl.h"
#include "spim-syscall.h"
#include "mips-syscall.h"
#ifdef CL_SPIM
#include "cl-except.h"
#endif
/* Imported variables: */
extern int errno;
/* Imported functions: */
#ifdef __STDC__
extern int close (int);
extern int dup (int);
extern int syscall (int, ...);
extern int select ();
#else
extern int close ();
extern int dup ();
extern int syscall ();
extern int select ();
#endif
/* Local functions: */
#ifdef __STDC__
static void do_sigreturn (mem_addr sigptr);
static int reverse_fds (int fd);
static void setup_signal_stack (void);
static int unixsyscall (void);
#else
static void do_sigreturn ();
static int reverse_fds ();
static void setup_signal_stack ();
static int unixsyscall ();
#endif
#ifndef mips
#ifndef OPEN_MAX
#define OPEN_MAX 20
#endif
#endif
#ifndef NSIG
#define NSIG 128
#endif
/* Local variables: */
static int prog_sigmask = 0; /* Copy of sigmask passed to system */
#ifdef mips
static mem_addr exception_address[NSIG]; /* trampoline addresses for */
/* each signal handler */
static struct sigvec sighandler[NSIG]; /* Map to program handlers */
#endif
static int prog_fds[OPEN_MAX]; /* Map from program fds to simulator fds */
static int fds_initialized = 0; /* FD map initialized? */
#define REG_ERR 7
/* Table describing arguments to syscalls. */
typedef struct
{
int syscall_num;
int syscall_type;
int arg0;
int arg1;
int arg2;
int arg3;
int arg4;
char *syscall_name;
} syscall_desc;
enum {BAD_SYSCALL, UNIX_SYSCALL, SPC_SYSCALL};
enum {NO_ARG, INT_ARG, ADDR_ARG, STR_ARG, FD_ARG}; /* Type of argument */
static syscall_desc syscall_table[] =
{
#ifdef mips
{SYS_syscall, SPC_SYSCALL, INT_ARG, INT_ARG, INT_ARG, INT_ARG, NO_ARG,
"syscall"},
{SYS_exit, SPC_SYSCALL, INT_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "exit"},
{SYS_fork, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "fork"},
{SYS_read, UNIX_SYSCALL, FD_ARG, ADDR_ARG, INT_ARG, NO_ARG, NO_ARG, "read"},
{SYS_write, UNIX_SYSCALL, FD_ARG, STR_ARG, INT_ARG, NO_ARG, NO_ARG, "write"},
{SYS_open, SPC_SYSCALL, STR_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG, "open"},
{SYS_close, SPC_SYSCALL, FD_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "close"},
{7, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_creat, SPC_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG, "creat"},
{SYS_link, UNIX_SYSCALL, STR_ARG, STR_ARG, NO_ARG, NO_ARG, NO_ARG, "link"},
{SYS_unlink, UNIX_SYSCALL, STR_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"unlink"},
{SYS_execv, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "execv"},
{SYS_chdir, UNIX_SYSCALL, STR_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "chdir"},
{13, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_mknod, UNIX_SYSCALL, STR_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG,
"mknod"},
{SYS_chmod, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG, "chmod"},
{SYS_chown, UNIX_SYSCALL, STR_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG,
"chown"},
{SYS_brk, SPC_SYSCALL, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "brk"},
{18, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_lseek, UNIX_SYSCALL, FD_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG, "lseek"},
{SYS_getpid, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "getpid"},
{SYS_mount, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "mount"},
{SYS_umount, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "umount"},
{23, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_getuid, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "getuid"},
{25, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_ptrace, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "ptrace"},
{27, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{28, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{29, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{30, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{31, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{32, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_access, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"access"},
{34, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{35, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_sync, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "sync"},
{SYS_kill, UNIX_SYSCALL, INT_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG, "kill"},
{SYS_stat, UNIX_SYSCALL, STR_ARG, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG, "stat"},
{39, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_lstat, UNIX_SYSCALL, STR_ARG, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG,
"lstat"},
{SYS_dup, SPC_SYSCALL, FD_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "dup"},
{SYS_pipe, UNIX_SYSCALL, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "pipe"},
{43, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_profil, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "profil"},
{45, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{46, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_getgid, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "getgid"},
{48, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{49, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{50, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_acct, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "acct"},
{52, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{53, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_ioctl, UNIX_SYSCALL, FD_ARG, INT_ARG, ADDR_ARG, NO_ARG, NO_ARG,
"ioctl"},
{SYS_reboot, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "reboot"},
{56, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_symlink, UNIX_SYSCALL, STR_ARG, STR_ARG, NO_ARG, NO_ARG, NO_ARG,
"symlink"},
{SYS_readlink, UNIX_SYSCALL, ADDR_ARG, ADDR_ARG, INT_ARG, NO_ARG, NO_ARG,
"readlink"},
{SYS_execve, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "execve"},
{SYS_umask, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "umask"},
{SYS_chroot, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "chroot"},
{SYS_fstat, UNIX_SYSCALL, FD_ARG, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG, "fstat"},
{63, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_getpagesize, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getpagesize"},
{SYS_mremap, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "mremap"},
{SYS_vfork, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "vfork"},
{67, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{68, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_sbrk, SPC_SYSCALL, INT_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "sbrk"},
{SYS_sstk, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "sstk"},
{SYS_mmap, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "mmap"},
{SYS_vadvise, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"vadvise"},
{SYS_munmap, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "munmap"},
{SYS_mprotect, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"mprotect"},
{SYS_madvise, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"madvise"},
{SYS_vhangup, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"vhangup"},
{77, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_mincore, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"mincore"},
{SYS_getgroups, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getgroups"},
{SYS_setgroups, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setgroups"},
{SYS_getpgrp, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getpgrp"},
{SYS_setpgrp, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setpgrp"},
{SYS_setitimer, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setitimer"},
{SYS_wait3, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "wait3"},
{SYS_swapon, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "swapon"},
{SYS_getitimer, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getitimer"},
{SYS_gethostname, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"gethostname"},
{SYS_sethostname, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"sethostname"},
{SYS_getdtablesize, UNIX_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getdtablesize"},
{SYS_dup2, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "dup2"},
{SYS_getdopt, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getdopt"},
{SYS_fcntl, UNIX_SYSCALL, FD_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG, "fcntl"},
{SYS_select, SPC_SYSCALL, INT_ARG, ADDR_ARG, ADDR_ARG, ADDR_ARG, ADDR_ARG,
"select"},
{SYS_setdopt, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setdopt"},
{SYS_fsync, UNIX_SYSCALL, FD_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "fsync"},
{SYS_setpriority, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setpriority"},
{SYS_socket, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "socket"},
{SYS_connect, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"connect"},
{SYS_accept, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "accept"},
{SYS_getpriority, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getpriority"},
{SYS_send, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "send"},
{SYS_recv, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "recv"},
{SYS_sigreturn, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigreturn"},
{SYS_bind, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "bind"},
{SYS_setsockopt, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setsockopt"},
{SYS_listen, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "listen"},
{107, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_sigvec, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "sigvec"},
{SYS_sigblock, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigblock"},
{SYS_sigsetmask, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigsetmask"},
{SYS_sigpause, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigpause"},
{SYS_sigstack, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigstack"},
{SYS_recvmsg, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"recvmsg"},
{SYS_sendmsg, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sendmsg"},
{115, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_gettimeofday, UNIX_SYSCALL, ADDR_ARG, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG,
"gettimeofday"},
{SYS_getrusage, UNIX_SYSCALL, INT_ARG, ADDR_ARG, NO_ARG, NO_ARG, NO_ARG,
"getrusage"},
{SYS_getsockopt, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getsockopt"},
{119, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_readv, UNIX_SYSCALL, FD_ARG, ADDR_ARG, INT_ARG, NO_ARG, NO_ARG,
"readv"},
{SYS_writev, UNIX_SYSCALL, FD_ARG, ADDR_ARG, INT_ARG, NO_ARG, NO_ARG,
"writev"},
{SYS_settimeofday, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"settimeofday"},
{SYS_fchown, UNIX_SYSCALL, FD_ARG, INT_ARG, INT_ARG, NO_ARG, NO_ARG,
"fchown"},
{SYS_fchmod, UNIX_SYSCALL, FD_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"fchmod"},
{SYS_recvfrom, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"recvfrom"},
{SYS_setreuid, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setreuid"},
{SYS_setregid, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setregid"},
{SYS_rename, UNIX_SYSCALL, STR_ARG, STR_ARG, NO_ARG, NO_ARG, NO_ARG,
"rename"},
{SYS_truncate, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"truncate"},
{SYS_ftruncate, UNIX_SYSCALL, FD_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"ftruncate"},
{SYS_flock, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "flock"},
{132, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_sendto, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "sendto"},
{SYS_shutdown, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"shutdown"},
{SYS_socketpair, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"socketpair"},
{SYS_mkdir, UNIX_SYSCALL, STR_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG, "mkdir"},
{SYS_rmdir, UNIX_SYSCALL, STR_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "rmdir"},
{SYS_utimes, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "utimes"},
{SYS_sigcleanup, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sigcleanup"},
{SYS_adjtime, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"adjtime"},
{SYS_getpeername, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getpeername"},
{SYS_gethostid, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"gethostid"},
{SYS_sethostid, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"sethostid"},
{SYS_getrlimit, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getrlimit"},
{SYS_setrlimit, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setrlimit"},
{SYS_killpg, UNIX_SYSCALL, INT_ARG, INT_ARG, NO_ARG, NO_ARG, NO_ARG,
"killpg"},
{147, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_setquota, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"setquota"},
{SYS_quota, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, "quota"},
{SYS_getsockname, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"getsockname"},
{SYS_sysmips, SPC_SYSCALL, INT_ARG, INT_ARG, INT_ARG, INT_ARG, INT_ARG,
"sysmips"},
{SYS_cacheflush, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"cacheflush"},
{SYS_cachectl, SPC_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"cachectl"},
{154, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG, ""},
{SYS_atomic_op, BAD_SYSCALL, NO_ARG, NO_ARG, NO_ARG, NO_ARG, NO_ARG,
"atomic_op"},
#else
0
#endif
};
#define MAX_SYSCALL (sizeof(syscall_table)/ sizeof(syscall_table[0]))
static int syscall_usage[MAX_SYSCALL]; /* Track system calls */
#define SYSCALL_ARG(REGOFF, ARG, REG) \
((syscall_table[R[REGOFF]].ARG == ADDR_ARG) ? \
(R[REG] == 0 ? 0 : MEM_ADDRESS(R[REG])) : \
(syscall_table[R[REGOFF]].ARG == STR_ARG) ? MEM_ADDRESS(R[REG]) : \
(((syscall_table[R[REGOFF]].ARG == FD_ARG) \
&& (R[REG] < OPEN_MAX) && (R[REG] >= 0))) ? prog_fds[R[REG]] : R[REG])
#define SYSCALL_COUNT(SYSCALL) \
if (SYSCALL < MAX_SYSCALL && SYSCALL >= 0) syscall_usage[SYSCALL]++;
/* Decides which syscall to execute or simulate. Returns zero upon
exit syscall and non-zero to continue execution. */
#ifdef __STDC__
int
do_syscall (void)
#else
int
do_syscall ()
#endif
{
SYSCALL_COUNT(R[REG_V0]);
if (source_file)
{
/* Syscalls for the source-language version of SPIM. These are
easier to use than the real syscall and are portable to non-MIPS
(non-Unix?) operating systems. */
switch (R[REG_V0])
{
case PRINT_INT_SYSCALL:
write_output (console_out, "%d", R[REG_A0]);
break;
case PRINT_FLOAT_SYSCALL:
{
float val = FPR_S (REG_FA0);
write_output (console_out, "%f", val);
break;
}
case PRINT_DOUBLE_SYSCALL:
write_output (console_out, "%f", FPR[REG_FA0/2]);
break;
case PRINT_STRING_SYSCALL:
write_output (console_out, "%s", MEM_ADDRESS (R[REG_A0]));
break;
case READ_INT_SYSCALL:
{
static char str [256];
read_input (str, 256);
R[REG_RES] = atol (str);
break;
}
case READ_FLOAT_SYSCALL:
{
static char str [256];
read_input (str, 256);
FGR [REG_FRES] = (float) atof (str);
break;
}
case READ_DOUBLE_SYSCALL:
{
static char str [256];
read_input (str, 256);
FPR [REG_FRES] = atof (str);
break;
}
case READ_STRING_SYSCALL:
{
read_input ( (char *) MEM_ADDRESS (R[REG_A0]), R[REG_A1]);
break;
}
case SBRK_SYSCALL:
{
mem_addr x = data_top;
expand_data (R[REG_A0]);
R[REG_RES] = x;
break;
}
case EXIT_SYSCALL:
#ifdef CL_SPIM
if (cycle_level) return (-1);
else
#endif
return (0);
default:
#ifdef CL_SPIM
if (cycle_level)
return (0);
#endif
run_error ("Unknown system call: %d\n", R[REG_V0]);
break;
}
}
else
#ifdef mips
{
#ifdef CL_SPIM
if (!cycle_level)
#endif
if (!fds_initialized)
{
initialize_prog_fds ();
fds_initialized = 1;
}
/* Use actual MIPS system calls. First translate arguments from
simulated memory to actual memory and correct file descriptors. */
if (R[REG_V0] < 0 || R[REG_V0] > MAX_SYSCALL)
{
#ifdef CL_SPIM
if (cycle_level)
return(0);
#endif
run_error ("Illegal system call: %d\n", R[REG_V0]);
}
switch (syscall_table[R[REG_V0]].syscall_type)
{
case BAD_SYSCALL:
#ifdef CL_SPIM
if (cycle_level)
return(0);
#endif
run_error ("Unknown system call: %d\n", R[REG_V0]);
break;
case UNIX_SYSCALL:
unixsyscall ();
break;
case SPC_SYSCALL:
/* These syscalls need to be simulated specially: */
switch (R[REG_V0])
{
case SYS_syscall:
R[REG_V0] = R[REG_A0];
R[REG_A0] = R[REG_A1];
R[REG_A1] = R[REG_A2];
R[REG_A2] = R[REG_A3];
READ_MEM_WORD (R[REG_A3], R[REG_SP] + 16);
#ifdef CL_SPIM
if (cycle_level)
return (do_syscall());
#endif
do_syscall ();
break;
case SYS_sysmips:
{
/* The table smipst maps from the sysmips arguments to syscall
numbers */
int callno;
static int smipst[] = {7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, SYS_getrusage, SYS_wait3,
SYS_cacheflush, SYS_cachectl};
callno= R[REG_A0];
callno= ( (callno >0x100) ? smipst[callno - 0x100 + 10]
: smipst[callno]);
R[REG_V0] = callno;
R[REG_A0] = R[REG_A1];
R[REG_A1] = R[REG_A2];
R[REG_A2] = R[REG_A3];
READ_MEM_WORD (R[REG_A3], R[REG_SP] + 16);
#ifdef CL_SPIM
if (cycle_level)
return (do_syscall());
#endif
do_syscall ();
break;
}
case SYS_exit:
{
#ifdef CL_SPIM
if (cycle_level)
{
write_output (message_out,
"\nProgram exited with value (%d).\n",
R[REG_A0]);
return (-1);
}
#endif
kill_prog_fds ();
return (0);
}
case SYS_close:
if (unixsyscall () >= 0)
prog_fds[R[REG_A0]] = -1; /* Mark file descriptor closed */
break;
case SYS_open:
case SYS_creat:
case SYS_dup:
{
int ret = unixsyscall ();
if (ret >= 0)
prog_fds[ret] = ret; /* Update fd translation table */
break;
}
case SYS_pipe:
{
/* This isn't too useful unless we implement fork () or other
fd passing mechanisms */
int fd1, fd2;
if (unixsyscall () >= 0)
{
READ_MEM_WORD (fd1, MEM_ADDRESS (R[REG_A0]));
READ_MEM_WORD (fd2, MEM_ADDRESS (R[REG_A0]));
prog_fds[fd1] = fd1;
prog_fds[fd2] = fd2;
}
break;
}
case SYS_select:
{
int fd;
/*
* We have to use this kludge to circumvent typechecking
* because the memory read macros take the lefthand side
* as an argument instead of simply returnign the value
* at the address
*/
long int kludge;
fd_set a, b, c;
fd_set *readfds = &a, *writefds = &b, *exceptfds = &c;
struct timeval *timeout;
FD_ZERO (readfds);
FD_ZERO (writefds);
FD_ZERO (exceptfds);
READ_MEM_WORD (kludge, R[REG_SP] + 16);
if (kludge == NULL)
timeout = NULL;
else
timeout = (struct timeval *) MEM_ADDRESS (kludge);
if (R[REG_A1] == NULL)
readfds = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, (fd_set *) MEM_ADDRESS (R[REG_A1])))
FD_SET (prog_fds[fd], readfds);
if (R[REG_A2] == NULL)
writefds = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, (fd_set *) MEM_ADDRESS (R[REG_A2])))
FD_SET (prog_fds[fd], writefds);
if (R[REG_A3] == NULL)
exceptfds = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, (fd_set *) MEM_ADDRESS (R[REG_A3])))
FD_SET (prog_fds[fd], exceptfds);
R[REG_RES] = select (R[REG_A0], readfds, writefds, exceptfds,
timeout);
if (readfds == NULL)
R[REG_A1] = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, readfds))
FD_SET (reverse_fds (fd),
(fd_set *) MEM_ADDRESS (R[REG_A1]));
if (writefds == NULL)
R[REG_A2] = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, writefds))
FD_SET (reverse_fds (fd),
(fd_set *) MEM_ADDRESS (R[REG_A2]));
if (exceptfds == NULL)
R[REG_A3] = NULL;
else
for (fd = 0; fd < R[REG_A0]; fd++)
if (FD_ISSET (fd, exceptfds))
FD_SET (reverse_fds (fd),
(fd_set *) MEM_ADDRESS (R[REG_A3]));
if (R[REG_RES] < 0)
{
R[REG_ERR] = -1;
R[REG_RES] = errno;
return (-1);
}
else
{
R[REG_ERR] = 0;
return (R[REG_RES]);
}
}
case SYS_sbrk:
{
expand_data (R[REG_A0]);
R[REG_RES] = program_break;
program_break += R[REG_A0];
R[REG_ERR] = 0;
break;
}
case SYS_brk:
/* Round up to 4096 byte (page) boundary */
if ( ( (int) R[REG_A0] - (int) data_top) > 0)
expand_data (ROUND (R[REG_A0], 4096)- (int)data_top);
R[REG_RES] = program_break;
program_break = ROUND (R[REG_A0], 4096);
R[REG_ERR] = 0;
break;
case SYS_sigvec:
{
int x;
#ifdef CL_SPIM
if (cycle_level) {
if (R[REG_A2] != 0) {
/* copy old sigvec data if structure is provided */
mem_addr tmp = MEM_ADDRESS(R[REG_A2]);
bcopy (&HANDLE(R[REG_A0]), tmp, sizeof(struct sigvec));
}
if (R[REG_A1] != 0) {
/* grab new sighandle information */
mem_addr tmp = MEM_ADDRESS(R[REG_A1]);
bcopy (tmp, &HANDLE(R[REG_A0]), sizeof(struct sigvec));
CATCH |= (1 << R[REG_A0]);
}
TRAMP(R[REG_A0]) = R[REG_A3];
R[REG_ERR] = 0;
break;
}
else
#endif
{
if (R[REG_A2] != 0)
* (struct sigvec *) MEM_ADDRESS (R[REG_A2]) = sighandler[R[REG_A0]];
READ_MEM_WORD (x, R[REG_A1]);
sighandler[R[REG_A0]].sv_handler = (void (*) ()) x;
READ_MEM_WORD (x,R[REG_A1] + sizeof (int *));
sighandler[R[REG_A0]].sv_mask = x;
READ_MEM_WORD (x,R[REG_A1] + sizeof (int *)
+ sizeof (sigset_t));
sighandler[R[REG_A0]].sv_flags = x;
exception_address[R[REG_A0]] = R[REG_A3];
R[REG_ERR] = 0;
break;
}
}
case SYS_sigreturn:
#ifdef CL_SPIM
if (cycle_level)
dosigreturn (MEM_ADDRESS (R[REG_A0]));
else
#endif
do_sigreturn (MEM_ADDRESS (R[REG_A0]));
R[REG_ERR] = 0;
break;
case SYS_sigsetmask:
#ifdef CL_SPIM
if (cycle_level) {
R[REG_RES] = MASK;
MASK = R[REG_A0];
}
else
#endif
{
R[REG_RES] = prog_sigmask;
prog_sigmask = R[REG_A0];
}
R[REG_ERR] = 0;
break;
case SYS_sigblock:
#ifdef CL_SPIM
if (cycle_level) {
R[REG_RES] = MASK;
MASK |= R[REG_A0];
}
else
#endif
{
R[REG_RES] = prog_sigmask;
prog_sigmask |= R[REG_A0];
}
R[REG_ERR] = 0;
break;
case SYS_cacheflush:
#if 0
R[REG_RES] = cache_flush ((void*)MEM_ADDRESS (R[REG_A0]),
R[REG_A1],
R[REG_A2]);
#endif
R[REG_ERR] = 0;
break;
case SYS_cachectl:
#if 0
R[REG_RES] = cache_ctl ((void*)MEM_ADDRESS (R[REG_A0]),
R[REG_A1],R
[REG_A2]);
#endif
R[REG_ERR] = 0;
break;
default:
#ifdef CL_SPIM
if (cycle_level)
return(0);
#endif
run_error ("Unknown special system call: %d\n",R[REG_V0]);
break;
}
break;
default:
#ifdef CL_SPIM
if (cycle_level)
return(0);
#endif
run_error ("Unknown type for syscall: %d\n", R[REG_V0]);
break;
}
}
#else
run_error ("Can't use MIPS syscall on non-MIPS system\n");
#endif
return (1);
}
/* Execute a Unix system call. Returns negative on error. */
#ifdef __STDC__
static int
unixsyscall (void)
#else
static int
unixsyscall ()
#endif
{
int arg0, arg1, arg2, arg3;
arg0 = SYSCALL_ARG (REG_V0,arg0, REG_A0);
arg1 = SYSCALL_ARG (REG_V0,arg1, REG_A1);
arg2 = SYSCALL_ARG (REG_V0,arg2, REG_A2);
arg3 = SYSCALL_ARG (REG_V0,arg3, REG_A3);
#ifdef amiga /* There's no reason for us to get here, just over-anxious :) */
printf("Amiga warning: Unsupported syscall\n");
return -1;
#else
R[REG_RES] = syscall (R[REG_V0], arg0, arg1, arg2, arg3);
#endif
/* See if an error has occurred during the system call. If so, the
libc wrapper must be notifified by setting register 7 to be less than
zero and the return value should be errno. If not, register 7 should
be zero. r7 acts like the carry flag in the old days. */
if (R[REG_RES] < 0)
{
R[REG_ERR] = -1;
R[REG_RES] = errno;
return (-1);
}
else
{
R[REG_ERR] = 0;
return (R[REG_RES]);
}
}
#ifdef __STDC__
static int
reverse_fds (int fd)
#else
static int
reverse_fds (fd)
int fd;
#endif
{
int i;
for (i = 0; i < OPEN_MAX; i++)
if (prog_fds[i] == fd)
return (i);
run_error ("Couldn't reverse translate fds\n");
return (-1);
}
#ifdef __STDC__
void
print_syscall_usage (void)
#else
void
print_syscall_usage ()
#endif
{
int x;
printf ("System call counts...\n\n");
printf ("Call#\t\tFrequency\n");
for (x = 0; x < MAX_SYSCALL; x ++)
if (syscall_usage[x] > 0)
printf("%d(%s)\t\t%d\n",
x, syscall_table[x].syscall_name, syscall_usage[x]);
printf ("\n");
}
#ifdef __STDC__
void
initialize_prog_fds (void)
#else
void
initialize_prog_fds ()
#endif
{
int x;
for (x = 0; x < OPEN_MAX; prog_fds[x++] = -1);
if (((prog_fds[0] = dup(0)) < 0) ||
((prog_fds[1] = dup(1)) < 0) ||
((prog_fds[2] = dup(2)) < 0))
error("init_prog_fds");
}
/* clear out programs file descriptors, close necessary files */
#ifdef __STDC__
void
kill_prog_fds (void)
#else
void
kill_prog_fds ()
#endif
{
int x;
for (x = 0; x < OPEN_MAX; x++)
if (prog_fds[x] != -1) close(prog_fds[x]);
}
#ifdef __STDC__
void
handle_exception (void)
#else
void
handle_exception ()
#endif
{
if (!quiet && ((Cause >> 2) & 0xf) != INT_EXCPT)
error ("Exception occurred at PC=0x%08x\n", EPC);
exception_occurred = 0;
PC = EXCEPTION_ADDR;
switch ((Cause >> 2) & 0xf)
{
case INT_EXCPT:
if (!source_file)
R[REG_A0] = SIGINT;
break;
case ADDRL_EXCPT:
if (!source_file)
R[REG_A0] = SIGSEGV;
if (!quiet)
error (" Unaligned address in inst/data fetch: 0x%08x\n",BadVAddr);
break;
case ADDRS_EXCPT:
if (!source_file)
R[REG_A0] = SIGSEGV;
if (!quiet)
error (" Unaligned address in store: 0x%08x\n", BadVAddr);
break;
case IBUS_EXCPT:
if (!source_file)
R[REG_A0] = SIGBUS;
if (!quiet)
error (" Bad address in text read: 0x%08x\n", BadVAddr);
break;
case DBUS_EXCPT:
if (!source_file)
R[REG_A0] = SIGBUS;
if (!quiet)
error (" Bad address in data/stack read: 0x%08x\n", BadVAddr);
break;
case BKPT_EXCPT:
exception_occurred = 0;
return;
case SYSCALL_EXCPT:
if (!quiet)
error (" Error in syscall\n");
break;
case RI_EXCPT:
if (!quiet)
error (" Reserved instruction execution\n");
break;
case OVF_EXCPT:
if (!source_file)
R[REG_A0] = SIGFPE;
if (!quiet)
error (" Arithmetic overflow\n");
break;
default:
if (!quiet)
error ("Unknown exception: %d\n", Cause >> 2);
break;
}
if (!source_file)
{
#ifdef mips
if ((prog_sigmask & (1 << R[REG_A0])) == 1)
return;
if((int) sighandler[R[REG_A0]].sv_handler == 0)
run_error ("Exception occurred at PC=0x%08x\nNo handler for it.\n",
EPC);
setup_signal_stack();
R[REG_A1] = 48;
R[REG_A2] = R[29];
R[REG_A3] = (int) sighandler[R[REG_A0]].sv_handler;
if ((PC = exception_address[R[REG_A0]]) == 0)
PC = (int) find_symbol_address ("sigvec") + 44;
#endif
}
}
#ifdef __STDC__
static void
setup_signal_stack (void)
#else
static void
setup_signal_stack ()
#endif
{
#ifdef mips
int i;
struct sigcontext *sc;
R[29] -= sizeof(struct sigcontext) + 4;
sc = (struct sigcontext *) MEM_ADDRESS (R[29]);
sc->sc_onstack = 0 /**/;
sc->sc_mask = prog_sigmask;
sc->sc_pc = EPC;
for(i=0; i < 32; ++i) /* general purpose registers */
sc->sc_regs[i] = R[i];
sc->sc_mdlo = LO; /* mul/div low */
sc->sc_mdhi = HI;
sc->sc_ownedfp = 0; /* fp has been used */
for(i=0; i < 32; ++i) /* FPU registers */
sc->sc_fpregs[i] = FPR[i];
sc->sc_fpc_csr = 0; /* floating point control and status reg */
sc->sc_fpc_eir = 0;
sc->sc_cause = Cause; /* cp0 cause register */
sc->sc_badvaddr = BadVAddr; /* cp0 bad virtual address */
sc->sc_badpaddr = 0; /* cpu bd bad physical address */
#endif
}
#ifdef __STDC__
static void
do_sigreturn (mem_addr sigptr)
#else
static void
do_sigreturn (sigptr)
mem_addr sigptr;
#endif
{
#ifdef mips
int i;
struct sigcontext *sc;
sc = (struct sigcontext *) sigptr;
prog_sigmask = sc->sc_mask;
PC = sc->sc_pc - BYTES_PER_WORD;
for(i=0; i < 32; ++i)
R[i] = sc->sc_regs[i];
LO = sc->sc_mdlo;
HI = sc->sc_mdhi;
for(i=0; i < 32; ++i) /* FPU registers */
FPR[i] = sc->sc_fpregs[i];
Cause = sc->sc_cause;
BadVAddr = sc->sc_badvaddr;
R[29] += sizeof(struct sigcontext) + 4;
#endif
}