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-rwxr-xr-xbin/opcode49
1 files changed, 27 insertions, 22 deletions
diff --git a/bin/opcode b/bin/opcode
index de1b3f8..8840e97 100755
--- a/bin/opcode
+++ b/bin/opcode
@@ -24,6 +24,9 @@
# with Opcode_WILLAMETTE_Base
# * Remove all line in Opcode_ARM_THUMB
# return values
+
+# shellcheck disable=SC2001,SC2034,SC2086
+
EXIT_FOUND=0
EXIT_NOT_FOUND=1
EXIT_USAGE=2
@@ -42,7 +45,8 @@ Line_Numbers=false
Leading_Context=0
Trailing_Context=0
-source "${0%/*}/../conf/Opcode_list" # include opcodes from a separate file
+# shellcheck source=lib/opcode_list
+source "${0%/*}/../lib/opcode_list" # include opcodes from a separate file
# GAS-specific opcodes (unofficial names) belonging to the x64 instruction set.
# They are generated by GNU tools (e.g. GDB, objdump) and specify a variant of ordinal opcodes like NOP and MOV.
@@ -162,7 +166,7 @@ usage() {
echo "The script uses Intel opcode syntax. When used in conjunction with objdump, \`-M intel' must be set in order to prevent opcode translation using AT&T syntax."
echo
echo "BE AWARE THAT THE LIST OF KNOWN INSTRUCTIONS OR INSTRUCTIONS SUPPORTED BY PARTICULAR ARCHITECTURES (ESPECIALLY AMD'S) IS ONLY TENTATIVE AND MAY CONTAIN MISTAKES!"
- kill -TRAP $TOP_PID
+ kill -TRAP "$TOP_PID"
}
list_contains() { # Returns 0 if $2 is in array $1, 1 otherwise.
@@ -175,25 +179,25 @@ list_contains() { # Returns 0 if $2 is in array $1, 1 otherwise.
build_instruction_set() { # $1 = enum { Arch, InstSet }, $2 = architecture or instruction set as obtained using -L or -l, $3 = "architecture"/"instruction set" to be used in error message
local e
- list_contains "`eval echo \\\$${1}List`" "$2" || (echo "$2 is not a valid $3."; usage) # Test if the architecture/instruction set is valid.
- if [ -n "`eval echo \\\$${1}_${2}`" ]; then # Add the instruction set(s) if any.
- for e in `eval echo \\\$${1}_${2}`; do # Skip duplicates.
+ list_contains "$(eval echo \\\$${1}List)" "$2" || (echo "$2 is not a valid $3."; usage) # Test if the architecture/instruction set is valid.
+ if [ -n "$(eval echo \\\$${1}_${2})" ]; then # Add the instruction set(s) if any.
+ for e in $(eval echo \\\$${1}_${2}); do # Skip duplicates.
list_contains "$InstSet_Base" $e || InstSet_Base="$e $InstSet_Base"
done
fi
if [ $Recursive = true ]; then
- for a in `eval echo \\\$${1}Dep_$2`; do
+ for a in $(eval echo \\\$${1}Dep_$2); do
build_instruction_set $1 $a "$3"
done
fi
- InstSet_Base="`echo $InstSet_Base | sed 's/$ *//'`" # Remove trailing space.
+ InstSet_Base=$(echo $InstSet_Base | sed 's/$ *//') # Remove trailing space.
}
-trap "exit $EXIT_USAGE" TRAP # Allow usage() function to abort script execution.
+trap 'exit $EXIT_USAGE' TRAP # Allow usage() function to abort script execution.
export TOP_PID=$$ # PID of executing process.
# Parse command line arguments.
-while getopts ":ra:s:LliIcf:Fd:D:CvVm:nB:A:h" o; do
+while getopts ":ra:s:LliIcf:d:D:CvVm:nB:A:h" o; do
case $o in
r) Recursive=true ;;
a) build_instruction_set Arch "$OPTARG" "architecture" ;;
@@ -205,19 +209,19 @@ while getopts ":ra:s:LliIcf:Fd:D:CvVm:nB:A:h" o; do
echo $InstSet_Base
exit $EXIT_USAGE
else
- echo -e "No instruction set or architecture set.\n"
+ echo -e "No instruction set or architecture set.\\n"
usage
fi
;;
I)
if [ -n "$InstSet_Base" ]; then
for s in $InstSet_Base; do
- echo -ne "\e[31;1m$s:\e[0m "
+ echo -ne "\\e[31;1m$s:\\e[0m "
eval echo "\$Opcode_$s"
done
exit $EXIT_USAGE
else
- echo -e "No instruction set or architecture set.\n"
+ echo -e "No instruction set or architecture set.\\n"
usage
fi
;;
@@ -226,12 +230,12 @@ while getopts ":ra:s:LliIcf:Fd:D:CvVm:nB:A:h" o; do
# Unlike architectures, instruction sets are disjoint.
Found=false
for s in $InstSetList; do
- for b in `eval echo \\\$InstSet_$s`; do
+ for b in $(eval echo \\\$InstSet_$s); do
Found_In_Base=false
- for i in `eval echo \\\$Opcode_$b`; do
+ for i in $(eval echo \\\$Opcode_$b); do
if [[ "$i" =~ ^$OPTARG$ ]]; then
- $Found_In_Base || echo -ne "Instruction set \e[33;1m$s\e[0m (base instruction set \e[32;1m$b\e[0m):"
- echo -ne " \e[31;1m$i\e[0m"
+ $Found_In_Base || echo -ne "Instruction set \\e[33;1m$s\\e[0m (base instruction set \\e[32;1m$b\\e[0m):"
+ echo -ne " \\e[31;1m$i\\e[0m"
Found_In_Base=true
Found=true
fi
@@ -240,7 +244,7 @@ while getopts ":ra:s:LliIcf:Fd:D:CvVm:nB:A:h" o; do
done
done
if [ $Found = false ]; then
- echo -e "Operation code \e[31;1m$OPTARG\e[0m has not been found in the database of known instructions." \
+ echo -e "Operation code \\e[31;1m$OPTARG\\e[0m has not been found in the database of known instructions." \
"Perhaps it is translated using other than Intel syntax. If obtained from objdump, check if the \`-M intel' flag is set." \
"Be aware that the search is case sensitive by default (you may use the -C flag, otherwise only lower case opcodes are accepted)."
exit $EXIT_NOT_FOUND
@@ -259,13 +263,13 @@ while getopts ":ra:s:LliIcf:Fd:D:CvVm:nB:A:h" o; do
A) Trailing_Context=$OPTARG ;;
h) usage ;;
\?)
- echo -e "Unknown option: -$OPTARG\n"
+ echo -e "Unknown option: -$OPTARG\\n"
usage
;;
esac
done
shift $((OPTIND-1))
-[ -n "$1" ] && echo -e "Unknown command line parameter: $1\n" && usage
+[ -n "$1" ] && echo -e "Unknown command line parameter: $1\\n" && usage
[ -z "$InstSet_Base" ] && usage
# Create list of grep parameters.
@@ -279,12 +283,13 @@ Grep_Params="--color=auto -B $Leading_Context -A $Trailing_Context"
# Build regular expression for use in grep.
RegEx=""
for s in $InstSet_Base; do
- eval RegEx=\"$RegEx \$Opcode_$s\"
+ eval 'RegEx="$RegEx $Opcode_'"$s"'"'
done
# Add leading and trailing opcode separators to prevent false positives.
-RegEx="$Leading_Separator`echo $RegEx | sed "s/ /$(echo "$Trailing_Separator"|sed 's/[\/&]/\\\&/g')|$(echo "$Leading_Separator"|sed 's/[\/&]/\\\&/g')/g"`$Trailing_Separator"
+RegEx="$Leading_Separator$(echo $RegEx | sed "s/ /$(echo "$Trailing_Separator"|sed 's/[\/&]/\\\&/g')|$(echo "$Leading_Separator"|sed 's/[\/&]/\\\&/g')/g")$Trailing_Separator"
-[ $Verbose = true -a $Count_Matching = false ] && RegEx="$RegEx|\$"
+[ $Verbose = true ] && [ $Count_Matching = false ] && RegEx="$RegEx|\$"
+# shellcheck disable=SC2086
# The actual search.
grep $Grep_Params -E "$RegEx" && exit $EXIT_FOUND || exit $EXIT_NOT_FOUND