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authorChangbin Du <changbin.du@intel.com>2018-04-05 16:18:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-05 21:36:21 -0700
commit6870c0165feaa5e337e78ab2c781ed46f086bca2 (patch)
tree886aace0056af86222c00b6a3903a33c1e6fab71 /scripts
parent8351760ff5b2042039554b4948ddabaac644a976 (diff)
downloadlinux-stericsson-6870c0165feaa5e337e78ab2c781ed46f086bca2.tar.gz
scripts/faddr2line: show the code context
Inspired by gdb command 'list', show the code context of target lines. Here is a example: $ scripts/faddr2line vmlinux native_write_msr+0x6 native_write_msr+0x6/0x20: arch_static_branch at arch/x86/include/asm/msr.h:105 100 return EAX_EDX_VAL(val, low, high); 101 } 102 103 static inline void notrace __wrmsr(unsigned int msr, u32 low, u32 high) 104 { 105 asm volatile("1: wrmsr\n" 106 "2:\n" 107 _ASM_EXTABLE_HANDLE(1b, 2b, ex_handler_wrmsr_unsafe) 108 : : "c" (msr), "a"(low), "d" (high) : "memory"); 109 } 110 (inlined by) static_key_false at include/linux/jump_label.h:142 137 #define JUMP_TYPE_LINKED 2UL 138 #define JUMP_TYPE_MASK 3UL 139 140 static __always_inline bool static_key_false(struct static_key *key) 141 { 142 return arch_static_branch(key, false); 143 } 144 145 static __always_inline bool static_key_true(struct static_key *key) 146 { 147 return !arch_static_branch(key, true); (inlined by) native_write_msr at arch/x86/include/asm/msr.h:150 145 static inline void notrace 146 native_write_msr(unsigned int msr, u32 low, u32 high) 147 { 148 __wrmsr(msr, low, high); 149 150 if (msr_tracepoint_active(__tracepoint_write_msr)) 151 do_trace_write_msr(msr, ((u64)high << 32 | low), 0); 152 } 153 154 /* Can be uninlined because referenced by paravirt */ 155 static inline int notrace Link: http://lkml.kernel.org/r/1521444205-2259-1-git-send-email-changbin.du@intel.com Signed-off-by: Changbin Du <changbin.du@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: NeilBrown <neilb@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Kate Stewart <kstewart@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/faddr2line12
1 files changed, 11 insertions, 1 deletions
diff --git a/scripts/faddr2line b/scripts/faddr2line
index 7721d5b2b0c0..9e5735a4d3a5 100755
--- a/scripts/faddr2line
+++ b/scripts/faddr2line
@@ -163,7 +163,17 @@ __faddr2line() {
# pass real address to addr2line
echo "$func+$offset/$sym_size:"
- ${ADDR2LINE} -fpie $objfile $addr | sed "s; $dir_prefix\(\./\)*; ;"
+ local file_lines=$(${ADDR2LINE} -fpie $objfile $addr | sed "s; $dir_prefix\(\./\)*; ;")
+ [[ -z $file_lines ]] && return
+
+ # show each line with context
+ echo "$file_lines" | while read -r line
+ do
+ echo $line
+ eval $(echo $line | awk -F "[ :]" '{printf("n1=%d;n2=%d;f=%s",$NF-5, $NF+5, $(NF-1))}')
+ awk 'NR>=strtonum("'$n1'") && NR<=strtonum("'$n2'") {printf("%d\t%s\n", NR, $0)}' $f
+ done
+
DONE=1
done < <(${NM} -n $objfile | awk -v fn=$func -v end=$file_end '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, "0x"$1 } END {if (found == 1) print line, end; }')