minix/commands/mdb/misc.c

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/*
* misc.c for mdb
*/
#include "mdb.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/param.h>
#define ptrace mdbtrace
#include <sys/ptrace.h>
#include "proto.h"
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static void pr_ascii(long val , int size );
/* Print ascii */
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static void pr_ascii(val, size)
long val;
int size;
{
int i;
int v;
int sh;
#ifdef BYTES_SWAPPED
sh = 8 * size;
#else
sh = 0;
#endif
for (i = 0; i < size; i++) {
v = (int) (val >> sh) & 0xFF;
#ifdef BYTES_SWAPPED
sh -= 8;
#else
sh += 8;
#endif
Printf(isprint(v) ? "%c" : "\\%03o", v);
}
Printf("\n");
}
/* Dump stack */
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void dump_stack(cnt)
long cnt;
{
vir_bytes v, vi;
long val, sp;
int num, size, nmode;
size = INTSIZE; /* size of stack element */
num = (int) cnt;
if (num <= 0) num = 0;
if (num > sk_size) num = (int) sk_size / size;
nmode = num; /* Save mode */
/* Get current SP */
sp = get_reg(curpid, reg_addr("sp"));
/* Starting address is top of stack seg -1 */
vi = (vir_bytes) sk_addr + (vir_bytes) sk_size - size;
/* Ending address */
v = (vir_bytes) end_addr;
if (nmode == 0) v = MAX(v, sp);
Printf("Stack Dump SP=%*lx\nAddr\tHex\tAscii\n", 2 * size, sp);
do {
val = (ptrace(T_GETDATA, curpid, (long) vi, 0L) >> SHIFT(size))
& MASK(size);
Printf("%*lx\t", 2 * ADDRSIZE, (vi >> SHIFT(ADDRSIZE))
& MASK(ADDRSIZE));
Printf("%*lx\t", 2 * size, val);
pr_ascii(val, size);
num -= 1;
vi -= size;
} while (vi >= v && (nmode ? num > 0 : 1));
}
/* Get file size */
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off_t file_size(fd)
int fd;
{
struct stat st;
if(fstat(fd,&st) <0 ) {
Printf("Cannot stat\n");
return 0L;
}
else
return st.st_size;
}
/* Print help page */
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void help_page()
{
outstr("\nHelp for mdb. For more details, type 'command ?'\n");
outstr("!#\t- Shell escape / Set Variable or register\n");
outstr("Tt\t- Current call / Backtrace all\n");
outstr("/nsf\t- Display for n size s with format f\n");
outstr("Xx [n]\t- Disasm / & display reg for n instructions\n");
outstr("Rr a\t- Run / with arguments a\n");
outstr("Cc [n]\t- Continue with current signal / no signal n times\n");
outstr("Ii [n]\t- Single step with / no signal for n instructions\n");
outstr("Mm t n\t- Trace until / Stop when modified t type for n instructions\n");
outstr("k \t- Kill traced process\n");
outstr("Bb\t- Display / Set Break-pt\n");
outstr("Dd\t- Delete all / one break-points\n");
outstr("P\t- Toggle Paging\n");
outstr("Ll name\t- Log to file name / and to standard output\n");
#ifdef DEBUG
outstr("Vv\t- Version info / Toggle debug flag\n");
#else
outstr("V\t- Version info\n");
#endif
outstr("e [t]\t- List symbols for type t\n");
outstr("y\t- Print segment mappings\n");
outstr("s [n]\t- Dump stack for n words\n");
#if SYSCALLS_SUPPORT
outstr("z [a]\t- Trace syscalls with address a\n");
#endif
outstr("? \t- Help - this screen\n");
outstr("@ file\t- Execute commands from file\n");
outstr("Qq\t- Quit / and kill traced process\n");
#ifdef DEBUG
outstr("Usage: mdb -x debug-level [-Ll]logfile exec-file core-file @command-file\n");
#else
outstr("Usage: mdb [-Ll]logfile exec-file core-file @command-file\n");
#endif
outstr(" mdb [-fc] file\n");
}
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void version_info()
{
Printf("\nmdb version %s.%d for Minix", MDBVERSION, MDBBUILD );
Printf(" %s.%s", OS_RELEASE, OS_VERSION);
#ifdef MINIX_PC
#ifdef __i386
Printf(" (32-bit)");
#else
Printf(" (16-bit)");
#endif
#endif
#ifdef MINIX_ST
Printf("-ST");
#endif
Printf("\n");
}
/* Print help message on command */
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void help_on(h)
int h;
{
switch (h) {
case '/':
outstr("<address> /nsf\t- Display for n items of size s with format f from address\n");
outstr("\t n defaults to 1\n");
outstr("\t s defaults to size of int\n");
outstr("\t can be b for byte h for short l for long\n");
outstr("\t f defaults to d for decimal\n");
outstr("\t can be x X o d D c s or u as in printf\n");
outstr("\t y treat value as address\n");
outstr("\t i disasm\n");
break;
case '@':
outstr("@ file\t- Execute commands from file\n");
break;
case '#':
outstr("# <address> cs value\t- Set Variable(s) at address to value\n");
outstr("\t\t\t for c count and size s\n");
outstr("\t\t\t b for byte h for short or l for long\n");
outstr("\t\t\t Count or size must be specified\n");
outstr("# $xx value\t\t- Set register $xx to value\n");
break;
case 'C':
outstr("C [n]\t- Continue with curent signal n times\n");
outstr("\t n defaults to 1\n");
break;
case 'c':
outstr("c [n]\t- Continue with no signal n times\n");
outstr("\t n defaults to 1\n");
break;
case 'e':
outstr("e [t]\t- List symbols for type t\n");
break;
case 's':
outstr("s [n]\t- Dump stack for n words\n");
outstr("\t n defaults to whole stack\n");
break;
case 'I':
outstr("I n\t- Single step with signal for n instructions n defaults to 1\n");
break;
case 'i':
outstr("i n\t- Single step with no signal for n instructions n defaults to 1\n");
break;
case 'M':
case 'm':
if ( h == 'M')
outstr("<address> M t n\t- Trace until\n");
else
outstr("<address> m t n\t- Stop when\n");
outstr("\t\t<address> is modified t type for n instructions\n");
outstr("\t\tn defaults to 1\n");
outstr("\t\tb for byte h for short l for long defaults to size of int\n");
break;
case 'T':
outstr("T\t- Display current call\n");
break;
case 't':
outstr("t\t- Backtrace all calls\n");
break;
case '!':
outstr("![command]\t- Shell escape or spawn command\n");
break;
case 'R':
outstr("R\t- Run the exec-file\n");
break;
case 'r':
outstr("r [arguments]\t- Run the exec-file with arguments\n");
break;
case 'k':
outstr("k\t- Kill traced process\n");
break;
case 'B':
outstr("B\t- Display all the Break points\n");
break;
case 'b':
outstr("<address> b [commands]\t- Set Break-pt at address\n");
outstr("\t\t\t commands will be executed by mdb at break-pt\n");
break;
case 'D':
outstr("D\t- Delete all break-points\n");
break;
case 'd':
outstr("<address> d\t- Delete one break-point at address\n");
break;
case 'q':
outstr("q\t- Quit mdb (and kill traced program)\n");
break;
case 'Q':
outstr("Q\t- Quit mdb immediately\n");
break;
case 'P':
outstr("P\t- Toggle Paging\n");
outstr("\t Defaults is OFF\n");
break;
case 'L':
outstr("L name\t- Log to file name\n");
outstr("L\t- Reset output to standard output\n");
break;
case 'l':
outstr("l name\t- Log to file name and standard output\n");
outstr("l\t- Reset output to standard output\n");
outstr("\t Defaults to none\n");
break;
#ifdef DEBUG
case 'v':
outstr("v\t- Toggle debug flag\n");
break;
#endif
case 'V':
outstr("V\t- Print Version Information for mdb\n");
break;
case 'X':
outstr("<address> X [n] [offset]\t- Disasm for n instructions\n");
outstr("\t\t\t Starting at address+offset\n");
break;
case 'x':
outstr("<address> x [n] offset\t- Disasm & display registers for n instructions\n");
outstr("\t\t\t Starting at address+offset\n");
break;
case 'y':
outstr("y\t- Print segment mappings\n");
break;
#if SYSCALLS_SUPPORT
case 'z':
outstr("z [address]\t- Trace system calls using address\n");
outstr("\t\t If the exec-file has symbols, mdb looks for __sendrec\n");
break;
#endif
default:
Printf("No help on command '%c' is available\n",h);
break;
}
}