361 lines
7.9 KiB
C
361 lines
7.9 KiB
C
/*
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* decode.c for mdb -- decodes a Minix system call
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*/
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#include "mdb.h"
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#ifdef SYSCALLS_SUPPORT
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#define ptrace mdbtrace
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#include <sys/ptrace.h>
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#include <minix/type.h>
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#include <minix/callnr.h>
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#include "proto.h"
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static void get_message(message *m, unsigned bx);
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static void get_data(char *s, unsigned bx, int cnt);
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static message sent;
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static message recv;
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static unsigned saved_addr;
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static int last_call;
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#define NOSYS 0
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#define NOP 1
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#define _M1 0x0100
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#define _M2 0x0200
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#define _M3 0x0400
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#define _M4 0x0800
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#define _M13 0x0500
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#define M1_I1 (_M1|1)
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#define M1_I2 (_M1|2)
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#define M1_I3 (_M1|4)
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#define M1_P1 (_M1|8)
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#define M1_P2 (_M1|16)
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#define M1_P3 (_M1|32)
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#define M2_I1 (_M2|1)
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#define M2_I2 (_M2|2)
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#define M2_I3 (_M2|4)
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#define M2_L1 (_M2|8)
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#define M2_L2 (_M2|16)
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#define M2_P1 (_M2|32)
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#define M3_I1 (_M3|1)
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#define M3_I2 (_M3|2)
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#define M3_P1 (_M3|4)
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#define M3_C1 (_M3|8)
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#define M4_L1 (_M4|1)
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#define M4_L2 (_M4|2)
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#define M4_L3 (_M4|4)
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#define M4_L4 (_M4|8)
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#define M4_L5 (_M4|16)
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#define M13_OPEN (_M13|1)
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#define M1_I12 (M1_I1|M1_I2)
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#define M1_NAME1 (M1_I1|M1_P1)
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#define M1_NAME2 (M1_I2|M1_P2)
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#define M1_2NAMES (M1_I1|M1_P1|M1_I2|M1_P2)
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#define M1_SIGACTION (M1_I2|M1_P1|M1_P2|M1_P3)
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#define M2_IOCTL (M2_I1|M2_I3|M2_L1|M2_L2)
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#define M2_4P (M2_I1|M2_I2|M2_L1|M2_L2)
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#define M2_SIGRETURN (M2_I2|M2_L1|M2_P1)
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#define M2_SIGPROC (M2_I1|M2_L1)
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#define M2_UTIME (M2_I1|M2_I2|M2_L1|M2_L2|M2_P1)
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#define M3_LOAD (M3_I1|M3_C1)
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struct decode_system {
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int syscall;
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unsigned int sflag;
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unsigned int rflag;
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char *name;
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} decode[NCALLS] = {
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0, NOSYS, NOP, NULL,
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EXIT, M1_I1, NOP, "EXIT",
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FORK, NOP, NOP, "FORK",
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READ, M1_I12, NOP, "READ",
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WRITE, M1_I12, NOP, "WRITE",
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OPEN, M13_OPEN, NOP, "OPEN",
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CLOSE, M1_I1, NOP, "CLOSE",
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WAIT, NOP, M2_I1, "WAIT",
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CREAT, M3_LOAD, NOP, "CREAT",
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LINK, M1_2NAMES, NOP, "LINK",
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UNLINK, M3_LOAD, NOP, "UNLINK",
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WAITPID, M1_I1, M2_I1, "WAITPID",
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CHDIR, M3_LOAD, NOP, "CHDIR",
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TIME, NOP, M2_L1, "TIME",
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MKNOD, M1_NAME1, NOP, "MKNOD",
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CHMOD, M3_LOAD, NOP, "CHMOD",
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CHOWN, M1_NAME1, NOP, "CHOWN",
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BRK, M1_P1, M2_P1, "BRK",
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STAT, M1_NAME1, NOP, "STAT",
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LSEEK, M1_I1, NOP, "LSEEK",
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MINIX_GETPID, NOP, NOP, "MINIX_GETPID",
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MOUNT, M1_2NAMES, NOP, "MOUNT",
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UMOUNT, M3_LOAD, NOP, "UMOUNT",
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SETUID, M1_I1, NOP, "SETUID",
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GETUID, NOP, NOP, "GETUID",
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STIME, M2_L1, NOP, "STIME",
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PTRACE, M2_4P, NOP, "PTRACE",
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ALARM, M1_I1, NOP, "ALARM",
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FSTAT, M1_I1, NOP, "FSTAT",
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PAUSE, NOP, NOP, "PAUSE",
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UTIME, M2_UTIME, NOP, "UTIME",
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31, NOSYS, NOP, NULL,
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32, NOSYS, NOP, NULL,
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ACCESS, M3_LOAD, NOP, "ACCESS",
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34, NOSYS, NOP, NULL,
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35, NOSYS, NOP, NULL,
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SYNC, NOP, NOP, "SYNC",
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KILL, M1_I12, NOP, "KILL",
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RENAME, M1_2NAMES, NOP, "RENAME",
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MKDIR, M1_NAME1, NOP, "MKDIR",
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RMDIR, M3_LOAD, NOP, "RMDIR",
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DUP, NOP, NOP, "DUP",
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PIPE, NOP, M1_I12, "PIPE",
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TIMES, M4_L5, NOP, "TIMES",
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44, NOSYS, NOP, NULL,
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45, NOSYS, NOP, NULL,
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SETGID, M1_I1, NOP, "SETGID",
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GETGID, NOP, NOP, "GETGID",
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SIGNAL, NOP, NOP, "SIGNAL",
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49, NOSYS, NOP, NULL,
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50, NOSYS, NOP, NULL,
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51, NOSYS, NOP, NULL,
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52, NOSYS, NOP, NULL,
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53, NOSYS, NOP, NULL,
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IOCTL, M2_IOCTL, M2_IOCTL, "IOCTL",
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FCNTL, M1_I12, NOP, "FCNTL",
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#if ENABLE_SYMLINK
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RDLINK, M1_NAME1, NOP, "RDLINK",
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SLINK, M1_NAME1, NOP, "SLINK",
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LSTAT, M1_NAME1, NOP, "LSTAT",
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#else
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56, NOSYS, NOP, NULL,
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57, NOSYS, NOP, NULL,
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58, NOSYS, NOP, NULL,
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#endif
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EXEC, M1_NAME1, NOP, "EXEC",
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UMASK, M1_I1, NOP, "UMASK",
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CHROOT, M3_LOAD, NOP, "CHROOT",
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SETSID, NOP, NOP, "SETSID",
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GETPGRP, NOP, NOP, "GETPGRP",
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KSIG, NOSYS, NOP, "KSIG",
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UNPAUSE, NOSYS, NOP, "UNPAUSE",
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66, NOSYS, NOP, NULL,
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REVIVE, NOSYS, NOP, "REVIVE",
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TASK_REPLY, NOSYS, NOP, "TASK_REPLY",
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69, NOSYS, NOP, NULL,
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70, NOSYS, NOP, NULL,
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SIGACTION, M1_SIGACTION, NOP, "SIGACTION",
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SIGSUSPEND, M2_L1, NOP, "SIGSUSPEND",
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SIGPENDING, NOP, M2_L1, "SIGPENDING",
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SIGPROCMASK, M2_SIGPROC, NOP, "SIGPROCMASK",
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SIGRETURN, M2_SIGRETURN, NOP, "SIGRETURN",
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REBOOT, M1_I1, NOP, "REBOOT"
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};
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static void get_message(m,bx)
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message *m;
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unsigned bx;
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{
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unsigned addr;
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int i;
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long buffer[ MESS_SIZE/4 + 1 ];
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addr = bx;
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for (i = 0; i< sizeof(buffer)/4; i++)
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buffer[i] = ptrace(T_GETDATA,curpid,
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(long) (addr+i*4) ,0L);
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memcpy(m,buffer,MESS_SIZE);
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}
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static void get_data(s, bx, cnt)
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char *s;
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unsigned bx;
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int cnt;
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{
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unsigned addr;
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int i,nl;
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long buffer[PATH_MAX/4 + 1];
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addr = bx;
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nl = (cnt / 4) + 1;
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for (i = 0; i< nl; i++)
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buffer[i] = ptrace(T_GETDATA, curpid, (long) (addr+i*4) ,0L);
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memcpy(s, buffer, cnt);
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}
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void decode_result()
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{
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/* Update message */
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get_message(&recv,saved_addr);
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Printf("result=%d\n", recv.m_type);
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if (last_call < 0 || last_call >NCALLS) {
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Printf("Bad call in decode_result\n");
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return;
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}
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switch (decode[last_call].rflag) {
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case NOP:
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return;
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break;
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case M1_I12:
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Printf("m1_l1=%d m1_i2=%d ",recv.m1_i1,recv.m1_i2);
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break;
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case M2_IOCTL:
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decode_ioctl('R',&recv);
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break;
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case M2_P1:
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Printf("m2_p1=%lx ",(unsigned long)recv.m2_p1);
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break;
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case M2_L1:
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Printf("m2_l1=%lx ",recv.m2_l1);
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break;
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case M2_I1:
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Printf("m2_i1=%x ",recv.m2_i1);
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break;
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default:
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Printf("rflag=%d ",decode[last_call].rflag);
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break;
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}
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Printf("\n");
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}
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void decode_message(bx)
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unsigned bx;
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{
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int t;
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int slen;
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unsigned int flag;
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char path[PATH_MAX];
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/* Save address of message */
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saved_addr = bx;
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get_message(&sent,bx);
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t = sent.m_type;
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if ( t <= 0 || t >= NCALLS ) {
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Printf("Bad call - not in range\n");
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last_call = 0;
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return;
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}
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flag = decode[t].sflag;
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if ( flag == NOSYS) {
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Printf("Bad call - not in system\n");
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last_call = 0;
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return;
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}
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else
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last_call = t;
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Printf(" type %s (%d) ", decode[last_call].name, last_call);
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switch (flag) {
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case NOP:
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break;
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case M1_I1:
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case M1_I12:
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Printf("i1=%d ",sent.m1_i1);
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if ( flag == M1_I1) break;
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case M1_I2:
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Printf("i2=%d ",sent.m1_i2);
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break;
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case M1_P1:
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Printf("p1=%lx ",(unsigned long)sent.m1_p1);
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break;
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case M1_NAME1:
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case M1_2NAMES:
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slen = sent.m1_i1;
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get_data(path, (unsigned long) sent.m1_p1, slen);
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path[slen] = '\0';
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Printf("s1=%s ",path);
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if ( flag == M1_NAME1) break;
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slen = sent.m1_i2;
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get_data(path, (unsigned long) sent.m1_p2, slen);
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path[slen] = '\0';
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Printf("s2=%s ",path);
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break;
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case M2_UTIME:
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if ( sent.m2_i1 == 0 )
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slen = sent.m2_i2;
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else
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slen = sent.m2_i1;
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get_data(path, (unsigned long) sent.m2_p1, slen);
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path[slen] = '\0';
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Printf("p1=%s ",path);
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if ( sent.m2_i1 != 0 )
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Printf("l1=%lx l2=%lx ",sent.m2_l1,sent.m2_l2);
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break;
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case M1_SIGACTION:
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Printf("m1_i2=%d p1=%lx p2=%lx p3=%lx\n",
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sent.m1_i2,
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(unsigned long)sent.m1_p1,
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(unsigned long)sent.m1_p2,
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(unsigned long)sent.m1_p3);
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break;
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case M2_4P: Printf("m2_i1=%d m2_i2=%d m2_l1=%lx m2_l2=%lx ",
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sent.m2_i1,sent.m2_i2,sent.m2_l1,sent.m2_l2);
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break;
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case M2_L1:
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Printf("m2_l1=%ld ",sent.m2_l1);
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break;
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case M2_IOCTL:
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decode_ioctl('S',&sent);
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break;
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case M2_SIGRETURN:
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Printf("m2_i2=%d l1=%lx p1=%lx ",
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sent.m2_i2,sent.m2_l1,
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(unsigned long)sent.m1_p1);
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break;
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case M2_SIGPROC:
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Printf("m2_i1=%d l1=%lx ", sent.m2_i1,sent.m2_l1);
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break;
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case M13_OPEN:
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if (sent.m1_i2 & O_CREAT) {
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slen = sent.m1_i1;
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get_data(path, (unsigned long) sent.m1_p1, slen);
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path[slen] = '\0';
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Printf("s1=%s ",path);
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break;
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}
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/* fall to M3_LOAD */
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case M3_LOAD:
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slen = sent.m3_i1;
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if ( slen <= M3_STRING)
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strncpy(path,sent.m3_ca1,M3_STRING);
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else
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get_data(path, (unsigned long) sent.m3_ca1, slen);
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path[slen] = '\0';
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Printf("m3_name=%s ",path);
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break;
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case M4_L5:
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Printf("m4_l5=%ld ",sent.m4_l5);
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break;
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default: Printf("sflag=%d ",decode[last_call].sflag);
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break;
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}
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Printf("\n");
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}
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#endif /* SYSCALLS_SUPPORT */
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