On Tue, May 29, 2018 at 06:03:32PM +0200, Peter Zijlstra wrote:
> On Mon, Mar 19, 2018 at 03:23:25PM +0800, changbin...@intel.com wrote:
> > From: Changbin Du <changbin...@intel.com>
> >
> > 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
>
> Not a fan of this :-/ And you didn't even make it optional. Nor did you
> Cc the original author of the tool.
Yeah, understand your compatibility concern, and thanks for your improvment.
I only added people from 'scripts/get_maintainer.pl'.
--
Thanks,
Changbin Du
