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perf annotate: ARM support

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Add basic support to parse ARM assembly.

This:

* enables perf to correctly show the disassembly, rather than chopping
  some constants off at the '#' (which is not a comment character on
  ARM).

* allows perf to identify ARM instructions that branch to other parts
  within the same function, thereby properly annotating them.

* allows perf to identify function calls, allowing called functions to
  be followed in the annotated view.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/n/tip-owp1uj0nmcgfrlppfyeetuyf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Russell King 2015-12-06 23:07:13 +00:00 committed by Arnaldo Carvalho de Melo
parent c8280cec2a
commit cfef25b8da
1 changed files with 23 additions and 0 deletions
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23
tools/perf/util/annotate.c
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@ -65,6 +65,11 @@ static int call__parse(struct ins_operands *ops)
name++;
#ifdef __arm__
if (strchr(name, '+'))
return -1;
#endif
tok = strchr(name, '>');
if (tok == NULL)
return -1;
@ -246,7 +251,11 @@ static int mov__parse(struct ins_operands *ops)
return -1;
target = ++s;
#ifdef __arm__
comment = strchr(s, ';');
#else
comment = strchr(s, '#');
#endif
if (comment != NULL)
s = comment - 1;
@ -354,6 +363,20 @@ static struct ins instructions[] = {
{ .name = "addq", .ops = &mov_ops, },
{ .name = "addw", .ops = &mov_ops, },
{ .name = "and", .ops = &mov_ops, },
#ifdef __arm__
{ .name = "b", .ops = &jump_ops, }, // might also be a call
{ .name = "bcc", .ops = &jump_ops, },
{ .name = "bcs", .ops = &jump_ops, },
{ .name = "beq", .ops = &jump_ops, },
{ .name = "bge", .ops = &jump_ops, },
{ .name = "bgt", .ops = &jump_ops, },
{ .name = "bhi", .ops = &jump_ops, },
{ .name = "bl", .ops = &call_ops, },
{ .name = "blt", .ops = &jump_ops, },
{ .name = "bls", .ops = &jump_ops, },
{ .name = "blx", .ops = &call_ops, },
{ .name = "bne", .ops = &jump_ops, },
#endif
{ .name = "bts", .ops = &mov_ops, },
{ .name = "call", .ops = &call_ops, },
{ .name = "callq", .ops = &call_ops, },