tjh.dev
+34
-11
scripts/faddr2line
+34
-11
scripts/faddr2line
···
95
95
local print_warnings=$4
96
96
97
97
local sym_name=${func_addr%+*}
98
-
local offset=${func_addr#*+}
99
-
offset=${offset%/*}
98
+
local func_offset=${func_addr#*+}
99
+
func_offset=${func_offset%/*}
100
100
local user_size=
101
+
local file_type
102
+
local is_vmlinux=0
101
103
[[ $func_addr =~ "/" ]] && user_size=${func_addr#*/}
102
104
103
-
if [[ -z $sym_name ]] || [[ -z $offset ]] || [[ $sym_name = $func_addr ]]; then
105
+
if [[ -z $sym_name ]] || [[ -z $func_offset ]] || [[ $sym_name = $func_addr ]]; then
104
106
warn "bad func+offset $func_addr"
105
107
DONE=1
106
108
return
107
109
fi
110
+
111
+
# vmlinux uses absolute addresses in the section table rather than
112
+
# section offsets.
113
+
local file_type=$(${READELF} --file-header $objfile |
114
+
${AWK} '$1 == "Type:" { print $2; exit }')
115
+
[[ $file_type = "EXEC" ]] && is_vmlinux=1
108
116
109
117
# Go through each of the object's symbols which match the func name.
110
118
# In rare cases there might be duplicates, in which case we print all
···
122
114
local sym_addr=0x${fields[1]}
123
115
local sym_elf_size=${fields[2]}
124
116
local sym_sec=${fields[6]}
117
+
local sec_size
118
+
local sec_name
125
119
126
120
# Get the section size:
127
-
local sec_size=$(${READELF} --section-headers --wide $objfile |
121
+
sec_size=$(${READELF} --section-headers --wide $objfile |
128
122
sed 's/\[ /\[/' |
129
123
${AWK} -v sec=$sym_sec '$1 == "[" sec "]" { print "0x" $6; exit }')
130
124
131
125
if [[ -z $sec_size ]]; then
132
126
warn "bad section size: section: $sym_sec"
127
+
DONE=1
128
+
return
129
+
fi
130
+
131
+
# Get the section name:
132
+
sec_name=$(${READELF} --section-headers --wide $objfile |
133
+
sed 's/\[ /\[/' |
134
+
${AWK} -v sec=$sym_sec '$1 == "[" sec "]" { print $2; exit }')
135
+
136
+
if [[ -z $sec_name ]]; then
137
+
warn "bad section name: section: $sym_sec"
133
138
DONE=1
134
139
return
135
140
fi
···
195
174
196
175
sym_size=0x$(printf %x $sym_size)
197
176
198
-
# Calculate the section address from user-supplied offset:
199
-
local addr=$(($sym_addr + $offset))
177
+
# Calculate the address from user-supplied offset:
178
+
local addr=$(($sym_addr + $func_offset))
200
179
if [[ -z $addr ]] || [[ $addr = 0 ]]; then
201
-
warn "bad address: $sym_addr + $offset"
180
+
warn "bad address: $sym_addr + $func_offset"
202
181
DONE=1
203
182
return
204
183
fi
···
212
191
fi
213
192
214
193
# Make sure the provided offset is within the symbol's range:
215
-
if [[ $offset -gt $sym_size ]]; then
194
+
if [[ $func_offset -gt $sym_size ]]; then
216
195
[[ $print_warnings = 1 ]] &&
217
-
echo "skipping $sym_name address at $addr due to size mismatch ($offset > $sym_size)"
196
+
echo "skipping $sym_name address at $addr due to size mismatch ($func_offset > $sym_size)"
218
197
continue
219
198
fi
220
199
···
223
202
[[ $FIRST = 0 ]] && echo
224
203
FIRST=0
225
204
226
-
echo "$sym_name+$offset/$sym_size:"
205
+
echo "$sym_name+$func_offset/$sym_size:"
227
206
228
207
# Pass section address to addr2line and strip absolute paths
229
208
# from the output:
230
-
local output=$(${ADDR2LINE} -fpie $objfile $addr | sed "s; $dir_prefix\(\./\)*; ;")
209
+
local args="--functions --pretty-print --inlines --exe=$objfile"
210
+
[[ $is_vmlinux = 0 ]] && args="$args --section=$sec_name"
211
+
local output=$(${ADDR2LINE} $args $addr | sed "s; $dir_prefix\(\./\)*; ;")
231
212
[[ -z $output ]] && continue
232
213
233
214
# Default output (non --list):