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minix/commands/mdb/decode.c
Ben Gras 36e935fe0f - added 'datasizes' script that shows you the size allocated 
for each symbol, usually answering those "why is does my binary have
   such a lot of BSS" questions.
 - stop binpackage looking in /var/spool for package files.
 - let makewhatis recognize .Sh as heading name
 - setup, fsck, df: allow >4kB block sizes painlessly
 - mkfs: new #-of-inodes heuristic that depends on kb, not
   on blocks; i've run out of inodes on my /usr
 - asmconv: don't silently truncate .aligns to 16 bytes
 - ipc* commands for shared memory support
2009-09-21 14:24:29 +00:00

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