scripts/findhit

   1 #!/bin/sh
   2 #
   3 # $0 <module> <offset> <sym> <hit>
   4 #
   5 # ie. $0 iffparse.library 0x080e34b0: SeekStream 0x80e5257
   6 #
   7
   8 if [ "$#" -eq 0 ]; then
   9     echo "$0 module offset sym hit"
  10     echo "Example: $0 iffparse.library 0x080e34b0: SeekStream 0x80e5257"
  11     exit 0
  12 fi
  13
  14 path=`dirname $0`
  15 module="$1"
  16 symoffset="$2"
  17 sym="$3"
  18 hitaddr="$4"
  19
  20 if [ ! -f "$module" ]; then
  21     echo "$0: $module: no such file"
  22     exit 1
  23 fi
  24
  25 entry=`nm "$module" | egrep " $sym\$"`
  26
  27 if [ -z "$entry" ]; then
  28     echo "$0: Can't find symbol $sym in $module"
  29     exit 1
  30 fi
  31
  32 #echo $entry
  33
  34 offset=`echo "0x$entry" | cut "-d " -f1`
  35 offset=`$path/strtoint $offset`
  36
  37 symoffset=`echo $symoffset | gawk ' { if (!match($1,/^0x/)) print "0x"$1; else print $1; }'`
  38 hitaddr=`echo $hitaddr | gawk ' { if (!match($1,/^0x/)) print "0x"$1; else print $1; }'`
  39
  40 symoffset=`$path/strtoint $symoffset`
  41 hitaddr=`$path/strtoint $hitaddr`
  42
  43 baseaddr=`expr $symoffset - $offset`
  44
  45 hitoffset=`expr $hitaddr - $baseaddr`
  46
  47 echo "baseaddr=`printf "%x" $baseaddr`"
  48 echo "hitoffset=`printf "%x" $hitoffset`"
  49
  50 if [ $hitoffset -lt 0 ]; then
  51     echo "Hit is not in $module"
  52     exit 1;
  53 fi
  54
  55 objdump --source --line-numbers "$module" | \
  56 gawk 'BEGIN { \
  57     lastoff=0; \
  58     hitoffset='$hitoffset'; \
  59     found=0; \
  60     cline[0]=""; \
  61     cline[1]=""; \
  62     cline[2]=""; \
  63     cline[3]=""; \
  64     file=""; \
  65     line=0; \
  66 } \
  67 /^[-a-zA-Z0-9_./]+:[0-9]+$/ { \
  68     split($0,a,":"); \
  69     file=a[1]; \
  70     line=int(a[2]); \
  71     next \
  72 } \
  73 /^[ \t]*[0-9a-f]+:?/ { \
  74     asmline[0]=asmline[1]; \
  75     asmline[1]=asmline[2]; \
  76     asmline[2]=asmline[3]; \
  77     asmline[3]=$0; \
  78     off=hex2int($1); \
  79     #print $1"="off; \
  80     if (lastoff <= hitoffset && off > hitoffset) \
  81     { \
  82         if (file!="")
  83             printf ("Hit is at line %d in file %s\n", line, file); \
  84         else
  85             printf ("Hit is 0x%x bytes in %s\n", hitoffset-lastoff, symbol); \
  86         for (t=0; t<4; t++) \
  87             print cline[t]; \
  88         print "        ..."; \
  89         for (t=0; t<4; t++) \
  90             print asmline[t]; \
  91         for (t=0; t<4; t++) \
  92         {\
  93             getline; \
  94             print; \
  95         } \
  96         found=1; \
  97         while (getline > 0); \
  98         nextfile; \
  99     } \
 100     symbol=$2; \
 101     lastoff=off; \
 102     next; \
 103 } \
 104  { \
 105     cline[0]=cline[1]; \
 106     cline[1]=cline[2]; \
 107     cline[2]=cline[3]; \
 108     cline[3]=$0; \
 109     line ++; \
 110 } \
 111 END { \
 112     if (!found) \
 113     { \
 114         print "Hit is not in '$module'"; \
 115         exit (1); \
 116     } \
 117 } \
 118 \
 119 function hex2int(str    ,x,n) { \
 120     x=str; \
 121     n=0; \
 122     while(x!="") \
 123     { \
 124         d=index("0123456789abcdef",tolower(substr(x,1,1)))-1; \
 125         if (d < 0) break; \
 126         n=n*16 + d;
 127         x=substr(x,2); \
 128     } \
 129     #print "str="str"  n="n; \
 130     return n; \
 131 }'