diff options
Diffstat (limited to 'arch/sparc/linux/process.cc')
| -rw-r--r-- | arch/sparc/linux/process.cc | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/arch/sparc/linux/process.cc b/arch/sparc/linux/process.cc new file mode 100644 index 000000000..fa2a7b9f5 --- /dev/null +++ b/arch/sparc/linux/process.cc @@ -0,0 +1,374 @@ +/* + * Copyright (c) 2003-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "arch/sparc/common_syscall_emul.hh" +#include "arch/sparc/linux/process.hh" +#include "arch/sparc/isa_traits.hh" + +#include "base/trace.hh" +#include "cpu/exec_context.hh" +#include "kern/linux/linux.hh" +#include "mem/functional/functional.hh" + +#include "sim/process.hh" +#include "sim/syscall_emul.hh" + +using namespace std; +using namespace SparcISA; + + +/// Target uname() handler. +static SyscallReturn +unameFunc(SyscallDesc *desc, int callnum, Process *process, + ExecContext *xc) +{ + TypedBufferArg<Linux::utsname> name(xc->getSyscallArg(0)); + + strcpy(name->sysname, "Linux"); + strcpy(name->nodename, "m5.eecs.umich.edu"); + strcpy(name->release, "2.4.20"); + strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003"); + strcpy(name->machine, "sparc"); + + name.copyOut(xc->mem); + return 0; +} + +SyscallDesc SparcLinuxProcess::syscallDescs[] = { + /* 0 */ SyscallDesc("restart_syscall", unimplementedFunc); + /* 1 */ SyscallDesc("exit", exitFunc); + /* 2 */ SyscallDesc("fork", unimplementedFunc); + /* 3 */ SyscallDesc("read", readFunc); + /* 4 */ SyscallDesc("write", writeFunc); + /* 5 */ SyscallDesc("open", openFunc<Linux>); + /* 6 */ SyscallDesc("close", closeFinc); + /* 7 */ SyscallDesc("wait4", unimplementedFunc); + /* 8 */ SyscallDesc("creat", unimplementedFunc); + /* 9 */ SyscallDesc("link", unimplementedFunc); + /* 10 */ SyscallDesc("unlink", unlinkFunc); + /* 11 */ SyscallDesc("execv", unimplementedFunc); + /* 12 */ SyscallDesc("chdir", unimplementedFunc); + /* 13 */ SyscallDesc("chown", chownFunc); + /* 14 */ SyscallDesc("mknod", unimplementedFunc); + /* 15 */ SyscallDesc("chmod", chmodFunc<Linux>); + /* 16 */ SyscallDesc("lchown", unimplementedFunc); + /* 17 */ SyscallDesc("brk", obreakFunc); + /* 18 */ SyscallDesc("perfctr", unimplementedFunc); + /* 19 */ SyscallDesc("lseek", lseekFunc); + /* 20 */ SyscallDesc("getpid", getpidFunc); + /* 21 */ SyscallDesc("capget", unimplementedFunc); + /* 22 */ SyscallDesc("capset", unimplementedFunc); + /* 23 */ SyscallDesc("setuid", setuidFunc); + /* 24 */ SyscallDesc("getuid", getuidFunc); + /* 25 */ SyscallDesc("time", unimplementedFunc); + /* 26 */ SyscallDesc("ptrace", unimplementedFunc); + /* 27 */ SyscallDesc("alarm", unimplementedFunc); + /* 28 */ SyscallDesc("sigaltstack", unimplementedFunc); + /* 29 */ SyscallDesc("pause", unimplementedFunc); + /* 30 */ SyscallDesc("utime", unimplementedFunc); + /* 31 */ SyscallDesc("lchown32", unimplementedFunc); + /* 32 */ SyscallDesc("fchown32", unimplementedFunc); + /* 33 */ SyscallDesc("access", unimplementedFunc); + /* 34 */ SyscallDesc("nice", unimplementedFunc); + /* 35 */ SyscallDesc("chown32", unimplementedFunc); + /* 36 */ SyscallDesc("sync", unimplementedFunc); + /* 37 */ SyscallDesc("kill", unimplementedFunc); + /* 38 */ SyscallDesc("stat", unimplementedFunc); + /* 39 */ SyscallDesc("sendfile", unimplementedFunc); + /* 40 */ SyscallDesc("lstat", unimplementedFunc); + /* 41 */ SyscallDesc("dup", unimplementedFunc); + /* 42 */ SyscallDesc("pipe", pipePseudoFunc); + /* 43 */ SyscallDesc("times", unimplementedFunc); + /* 44 */ SyscallDesc("getuid32", unimplementedFunc); + /* 45 */ SyscallDesc("umount2", unimplementedFunc); + /* 46 */ SyscallDesc("setgid", unimplementedFunc); + /* 47 */ SyscallDesc("getgid", getgidFunc); + /* 48 */ SyscallDesc("signal", unimplementedFunc); + /* 49 */ SyscallDesc("geteuid", geteuidFunc); + /* 50 */ SyscallDesc("getegid", getegidFunc); + /* 51 */ SyscallDesc("acct", unimplementedFunc); + /* 52 */ SyscallDesc("memory_ordering", unimplementedFunc); + /* 53 */ SyscallDesc("getgid32", unimplementedFunc); + /* 54 */ SyscallDesc("ioctl", unimplementedFunc); + /* 55 */ SyscallDesc("reboot", unimplementedFunc); + /* 56 */ SyscallDesc("mmap2", unimplementedFunc); + /* 57 */ SyscallDesc("symlink", unimplementedFunc); + /* 58 */ SyscallDesc("readlink", unimplementedFunc); + /* 59 */ SyscallDesc("execve", unimplementedFunc); + /* 60 */ SyscallDesc("umask", unimplementedFunc); + /* 61 */ SyscallDesc("chroot", unimplementedFunc); + /* 62 */ SyscallDesc("fstat", unimplementedFunc); + /* 63 */ SyscallDesc("fstat64", unimplementedFunc); + /* 64 */ SyscallDesc("getpagesize", unimplementedFunc); + /* 65 */ SyscallDesc("msync", unimplementedFunc); + /* 66 */ SyscallDesc("vfork", unimplementedFunc); + /* 67 */ SyscallDesc("pread64", unimplementedFunc); + /* 68 */ SyscallDesc("pwrite64", unimplementedFunc); + /* 69 */ SyscallDesc("geteuid32", unimplementedFunc); + /* 70 */ SyscallDesc("getdgid32", unimplementedFunc); + /* 71 */ SyscallDesc("mmap", unimplementedFunc); + /* 72 */ SyscallDesc("setreuid32", unimplementedFunc); + /* 73 */ SyscallDesc("munmap", unimplementedFunc); + /* 74 */ SyscallDesc("mprotect", unimplementedFunc); + /* 75 */ SyscallDesc("madvise", unimplementedFunc); + /* 76 */ SyscallDesc("vhangup", unimplementedFunc); + /* 77 */ SyscallDesc("truncate64", unimplementedFunc); + /* 78 */ SyscallDesc("mincore", unimplementedFunc); + /* 79 */ SyscallDesc("getgroups", unimplementedFunc); + /* 80 */ SyscallDesc("setgroups", unimplementedFunc); + /* 81 */ SyscallDesc("getpgrp", unimplementedFunc); + /* 82 */ SyscallDesc("setgroups32", unimplementedFunc); + /* 83 */ SyscallDesc("setitimer", unimplementedFunc); + /* 84 */ SyscallDesc("ftruncate64", unimplementedFunc); + /* 85 */ SyscallDesc("swapon", unimplementedFunc); + /* 86 */ SyscallDesc("getitimer", unimplementedFunc); + /* 87 */ SyscallDesc("setuid32", unimplementedFunc); + /* 88 */ SyscallDesc("sethostname", unimplementedFunc); + /* 89 */ SyscallDesc("setgid32", unimplementedFunc); + /* 90 */ SyscallDesc("dup2", unimplementedFunc); + /* 91 */ SyscallDesc("setfsuid32", unimplementedFunc); + /* 92 */ SyscallDesc("fcntl", unimplementedFunc); + /* 93 */ SyscallDesc("select", unimplementedFunc); + /* 94 */ SyscallDesc("setfsgid32", unimplementedFunc); + /* 95 */ SyscallDesc("fsync", unimplementedFunc); + /* 96 */ SyscallDesc("setpriority", unimplementedFunc); + /* 97 */ SyscallDesc("socket", unimplementedFunc); + /* 98 */ SyscallDesc("connect", unimplementedFunc); + /* 99 */ SyscallDesc("accept", unimplementedFunc); + /* 100 */ SyscallDesc("getpriority", unimplementedFunc); + /* 101 */ SyscallDesc("rt_sigreturn", unimplementedFunc); + /* 102 */ SyscallDesc("rt_sigaction", unimplementedFunc); + /* 103 */ SyscallDesc("rt_sigprocmask", unimplementedFunc); + /* 104 */ SyscallDesc("rt_sigpending", unimplementedFunc); + /* 105 */ SyscallDesc("rt_sigtimedwait", unimplementedFunc); + /* 106 */ SyscallDesc("rt_sigqueueinfo", unimplementedFunc); + /* 107 */ SyscallDesc("rt_sigsuspend", unimplementedFunc); + /* 108 */ SyscallDesc("setresuid", unimplementedFunc); + /* 109 */ SyscallDesc("getresuid", unimplementedFunc); + /* 110 */ SyscallDesc("setresgid", unimplementedFunc); + /* 111 */ SyscallDesc("getresgid", unimplementedFunc); + /* 112 */ SyscallDesc("setregid32", unimplementedFunc); + /* 113 */ SyscallDesc("recvmsg", unimplementedFunc); + /* 114 */ SyscallDesc("sendmsg", unimplementedFunc); + /* 115 */ SyscallDesc("getgroups32", unimplementedFunc); + /* 116 */ SyscallDesc("gettimeofday", unimplementedFunc); + /* 117 */ SyscallDesc("getrusage", unimplementedFunc); + /* 118 */ SyscallDesc("getsockopt", unimplementedFunc); + /* 119 */ SyscallDesc("getcwd", unimplementedFunc); + /* 120 */ SyscallDesc("readv", unimplementedFunc); + /* 121 */ SyscallDesc("writev", unimplementedFunc); + /* 122 */ SyscallDesc("settimeofday", unimplementedFunc); + /* 123 */ SyscallDesc("fchown", unimplementedFunc); + /* 124 */ SyscallDesc("fchmod", unimplementedFunc); + /* 125 */ SyscallDesc("recvfrom", unimplementedFunc); + /* 126 */ SyscallDesc("setreuid", unimplementedFunc); + /* 127 */ SyscallDesc("setregid", unimplementedFunc); + /* 128 */ SyscallDesc("rename", unimplementedFunc); + /* 129 */ SyscallDesc("truncate", unimplementedFunc); + /* 130 */ SyscallDesc("ftruncate", unimplementedFunc); + /* 131 */ SyscallDesc("flock", unimplementedFunc); + /* 132 */ SyscallDesc("lstat64", unimplementedFunc); + /* 133 */ SyscallDesc("sendto", unimplementedFunc); + /* 134 */ SyscallDesc("shutdown", unimplementedFunc); + /* 135 */ SyscallDesc("socketpair", unimplementedFunc); + /* 136 */ SyscallDesc("mkdir", unimplementedFunc); + /* 137 */ SyscallDesc("rmdir", unimplementedFunc); + /* 138 */ SyscallDesc("utimes", unimplementedFunc); + /* 139 */ SyscallDesc("stat64", unimplementedFunc); + /* 140 */ SyscallDesc("sendfile64", unimplementedFunc); + /* 141 */ SyscallDesc("getpeername", unimplementedFunc); + /* 142 */ SyscallDesc("futex", unimplementedFunc); + /* 143 */ SyscallDesc("gettid", unimplementedFunc); + /* 144 */ SyscallDesc("getrlimit", unimplementedFunc); + /* 145 */ SyscallDesc("setrlimit", unimplementedFunc); + /* 146 */ SyscallDesc("pivot_root", unimplementedFunc); + /* 147 */ SyscallDesc("prctl", unimplementedFunc); + /* 148 */ SyscallDesc("pciconfig_read", unimplementedFunc); + /* 149 */ SyscallDesc("pciconfig_write", unimplementedFunc); + /* 150 */ SyscallDesc("getsockname", unimplementedFunc); + /* 151 */ SyscallDesc("inotify_init", unimplementedFunc); + /* 152 */ SyscallDesc("inotify_add_watch", unimplementedFunc); + /* 153 */ SyscallDesc("poll", unimplementedFunc); + /* 154 */ SyscallDesc("getdents64", unimplementedFunc); + /* 155 */ SyscallDesc("fcntl64", unimplementedFunc); + /* 156 */ SyscallDesc("inotify_rm_watch", unimplementedFunc); + /* 157 */ SyscallDesc("statfs", unimplementedFunc); + /* 158 */ SyscallDesc("fstatfs", unimplementedFunc); + /* 159 */ SyscallDesc("umount", unimplementedFunc); + /* 160 */ SyscallDesc("sched_set_affinity", unimplementedFunc); + /* 161 */ SyscallDesc("sched_get_affinity", unimplementedFunc); + /* 162 */ SyscallDesc("getdomainname", unimplementedFunc); + /* 163 */ SyscallDesc("setdomainname", unimplementedFunc); + /* 164 */ SyscallDesc("utrap_install", unimplementedFunc); + /* 165 */ SyscallDesc("quotactl", unimplementedFunc); + /* 166 */ SyscallDesc("set_tid_address", unimplementedFunc); + /* 167 */ SyscallDesc("mount", unimplementedFunc); + /* 168 */ SyscallDesc("ustat", unimplementedFunc); + /* 169 */ SyscallDesc("setxattr", unimplementedFunc); + /* 170 */ SyscallDesc("lsetxattr", unimplementedFunc); + /* 171 */ SyscallDesc("fsetxattr", unimplementedFunc); + /* 172 */ SyscallDesc("getxattr", unimplementedFunc); + /* 173 */ SyscallDesc("lgetxattr", unimplementedFunc); + /* 174 */ SyscallDesc("getdents", unimplementedFunc); + /* 175 */ SyscallDesc("setsid", unimplementedFunc); + /* 176 */ SyscallDesc("fchdir", unimplementedFunc); + /* 177 */ SyscallDesc("fgetxattr", unimplementedFunc); + /* 178 */ SyscallDesc("listxattr", unimplementedFunc); + /* 179 */ SyscallDesc("llistxattr", unimplementedFunc); + /* 180 */ SyscallDesc("flistxattr", unimplementedFunc); + /* 181 */ SyscallDesc("removexattr", unimplementedFunc); + /* 182 */ SyscallDesc("lremovexattr", unimplementedFunc); + /* 183 */ SyscallDesc("sigpending", unimplementedFunc); + /* 184 */ SyscallDesc("query_module", unimplementedFunc); + /* 185 */ SyscallDesc("setpgid", unimplementedFunc); + /* 186 */ SyscallDesc("fremovexattr", unimplementedFunc); + /* 187 */ SyscallDesc("tkill", unimplementedFunc); + /* 188 */ SyscallDesc("exit_group", unimplementedFunc); + /* 189 */ SyscallDesc("uname", unameFunc); + /* 190 */ SyscallDesc("init_module", unimplementedFunc); + /* 191 */ SyscallDesc("personality", unimplementedFunc); + /* 192 */ SyscallDesc("remap_file_pages", unimplementedFunc); + /* 193 */ SyscallDesc("epoll_create", unimplementedFunc); + /* 194 */ SyscallDesc("epoll_ctl", unimplementedFunc); + /* 195 */ SyscallDesc("epoll_wait", unimplementedFunc); + /* 196 */ SyscallDesc("ioprio_set", unimplementedFunc); + /* 197 */ SyscallDesc("getppid", getppidFunc); + /* 198 */ SyscallDesc("sigaction", unimplementedFunc); + /* 199 */ SyscallDesc("sgetmask", unimplementedFunc); + /* 200 */ SyscallDesc("ssetmask", unimplementedFunc); + /* 201 */ SyscallDesc("sigsuspend", unimplementedFunc); + /* 202 */ SyscallDesc("oldlstat", unimplementedFunc); + /* 203 */ SyscallDesc("uselib", unimplementedFunc); + /* 204 */ SyscallDesc("readdir", unimplementedFunc); + /* 205 */ SyscallDesc("readahead", unimplementedFunc); + /* 206 */ SyscallDesc("socketcall", unimplementedFunc); + /* 207 */ SyscallDesc("syslog", unimplementedFunc); + /* 208 */ SyscallDesc("lookup_dcookie", unimplementedFunc); + /* 209 */ SyscallDesc("fadvise64", unimplementedFunc); + /* 210 */ SyscallDesc("fadvise64_64", unimplementedFunc); + /* 211 */ SyscallDesc("tgkill", unimplementedFunc); + /* 212 */ SyscallDesc("waitpid", unimplementedFunc); + /* 213 */ SyscallDesc("swapoff", unimplementedFunc); + /* 214 */ SyscallDesc("sysinfo", unimplementedFunc); + /* 215 */ SyscallDesc("ipc", unimplementedFunc); + /* 216 */ SyscallDesc("sigreturn", unimplementedFunc); + /* 217 */ SyscallDesc("clone", unimplementedFunc); + /* 218 */ SyscallDesc("ioprio_get", unimplementedFunc); + /* 219 */ SyscallDesc("adjtimex", unimplementedFunc); + /* 220 */ SyscallDesc("sigprocmask", unimplementedFunc); + /* 221 */ SyscallDesc("create_module", unimplementedFunc); + /* 222 */ SyscallDesc("delete_module", unimplementedFunc); + /* 223 */ SyscallDesc("get_kernel_syms", unimplementedFunc); + /* 224 */ SyscallDesc("getpgid", unimplementedFunc); + /* 225 */ SyscallDesc("bdflush", unimplementedFunc); + /* 226 */ SyscallDesc("sysfs", unimplementedFunc); + /* 227 */ SyscallDesc("afs_syscall", unimplementedFunc); + /* 228 */ SyscallDesc("setfsuid", unimplementedFunc); + /* 229 */ SyscallDesc("setfsgid", unimplementedFunc); + /* 230 */ SyscallDesc("_newselect", unimplementedFunc); + /* 231 */ SyscallDesc("time", unimplementedFunc); + /* 232 */ SyscallDesc("oldstat", unimplementedFunc); + /* 233 */ SyscallDesc("stime", unimplementedFunc); + /* 234 */ SyscallDesc("statfs64", unimplementedFunc); + /* 235 */ SyscallDesc("fstatfs64", unimplementedFunc); + /* 236 */ SyscallDesc("_llseek", unimplementedFunc); + /* 237 */ SyscallDesc("mlock", unimplementedFunc); + /* 238 */ SyscallDesc("munlock", unimplementedFunc); + /* 239 */ SyscallDesc("mlockall", unimplementedFunc); + /* 240 */ SyscallDesc("munlockall", unimplementedFunc); + /* 241 */ SyscallDesc("sched_setparam", unimplementedFunc); + /* 242 */ SyscallDesc("sched_getparam", unimplementedFunc); + /* 243 */ SyscallDesc("sched_setscheduler", unimplementedFunc); + /* 244 */ SyscallDesc("sched_getscheduler", unimplementedFunc); + /* 245 */ SyscallDesc("sched_yield", unimplementedFunc); + /* 246 */ SyscallDesc("sched_get_priority_max", unimplimented); + /* 247 */ SyscallDesc("sched_get_priority_min", unimplimented); + /* 248 */ SyscallDesc("sched_rr_get_interval", unimplimented); + /* 249 */ SyscallDesc("nanosleep", unimplementedFunc); + /* 250 */ SyscallDesc("mremap", unimplementedFunc); + /* 251 */ SyscallDesc("_sysctl", unimplementedFunc); + /* 252 */ SyscallDesc("getsid", unimplementedFunc); + /* 253 */ SyscallDesc("fdatasync", unimplementedFunc); + /* 254 */ SyscallDesc("nfsservctl", unimplementedFunc); + /* 255 */ SyscallDesc("aplib", unimplementedFunc); + /* 256 */ SyscallDesc("clock_settime", unimplementedFunc); + /* 257 */ SyscallDesc("clock_gettime", unimplementedFunc); + /* 258 */ SyscallDesc("clock_getres", unimplementedFunc); + /* 259 */ SyscallDesc("clock_nanosleep", unimplementedFunc); + /* 260 */ SyscallDesc("sched_getaffinity", unimplementedFunc); + /* 261 */ SyscallDesc("sched_setaffinity", unimplementedFunc); + /* 262 */ SyscallDesc("timer_settime", unimplementedFunc); + /* 263 */ SyscallDesc("timer_gettime", unimplementedFunc); + /* 264 */ SyscallDesc("timer_getoverrun", unimplementedFunc); + /* 265 */ SyscallDesc("timer_delete", unimplementedFunc); + /* 266 */ SyscallDesc("timer_create", unimplementedFunc); + /* 267 */ SyscallDesc("vserver", unimplementedFunc); + /* 268 */ SyscallDesc("io_setup", unimplementedFunc); + /* 269 */ SyscallDesc("io_destroy", unimplementedFunc); + /* 270 */ SyscallDesc("io_submit", unimplementedFunc); + /* 271 */ SyscallDesc("io_cancel", unimplementedFunc); + /* 272 */ SyscallDesc("io_getevents", unimplementedFunc); + /* 273 */ SyscallDesc("mq_open", unimplementedFunc); + /* 274 */ SyscallDesc("mq_unlink", unimplementedFunc); + /* 275 */ SyscallDesc("mq_timedsend", unimplementedFunc); + /* 276 */ SyscallDesc("mq_timedreceive", unimplementedFunc); + /* 277 */ SyscallDesc("mq_notify", unimplementedFunc); + /* 278 */ SyscallDesc("mq_getsetattr", unimplementedFunc); + /* 279 */ SyscallDesc("waitid", unimplementedFunc); + /* 280 */ SyscallDesc("sys_setaltroot", unimplementedFunc); + /* 281 */ SyscallDesc("add_key", unimplementedFunc); + /* 282 */ SyscallDesc("request_key", unimplementedFunc); + /* 283 */ SyscallDesc("keyctl", unimplementedFunc); +}; + +SparcLinuxProcess::SparcLinuxProcess(const std::string &name, + ObjectFile *objFile, + int stdin_fd, + int stdout_fd, + int stderr_fd, + std::vector<std::string> &argv, + std::vector<std::string> &envp) + : LiveProcess(name, objFile, stdin_fd, stdout_fd, stderr_fd, argv, envp), + Num_Syscall_Descs(sizeof(syscallDescs) / sizeof(SyscallDesc)) +{ + // The sparc syscall table must be <= 283 entries because that is all there + // is space for. + assert(Num_Syscall_Descs <= 283); + + init_regs->intRegFile[0] = 0; +} + + + +SyscallDesc* +AlphaLinuxProcess::getDesc(int callnum) +{ + if (callnum < 0 || callnum > Num_Syscall_Descs) + return NULL; + return &syscallDescs[callnum]; +} |