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perf annotate: ARM support
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>
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@ -65,6 +65,11 @@ static int call__parse(struct ins_operands *ops)
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name++;
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#ifdef __arm__
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if (strchr(name, '+'))
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return -1;
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#endif
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tok = strchr(name, '>');
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if (tok == NULL)
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return -1;
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@ -246,7 +251,11 @@ static int mov__parse(struct ins_operands *ops)
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return -1;
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target = ++s;
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#ifdef __arm__
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comment = strchr(s, ';');
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#else
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comment = strchr(s, '#');
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#endif
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if (comment != NULL)
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s = comment - 1;
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@ -354,6 +363,20 @@ static struct ins instructions[] = {
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{ .name = "addq", .ops = &mov_ops, },
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{ .name = "addw", .ops = &mov_ops, },
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{ .name = "and", .ops = &mov_ops, },
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#ifdef __arm__
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{ .name = "b", .ops = &jump_ops, }, // might also be a call
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{ .name = "bcc", .ops = &jump_ops, },
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{ .name = "bcs", .ops = &jump_ops, },
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{ .name = "beq", .ops = &jump_ops, },
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{ .name = "bge", .ops = &jump_ops, },
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{ .name = "bgt", .ops = &jump_ops, },
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{ .name = "bhi", .ops = &jump_ops, },
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{ .name = "bl", .ops = &call_ops, },
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{ .name = "blt", .ops = &jump_ops, },
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{ .name = "bls", .ops = &jump_ops, },
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{ .name = "blx", .ops = &call_ops, },
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{ .name = "bne", .ops = &jump_ops, },
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#endif
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{ .name = "bts", .ops = &mov_ops, },
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{ .name = "call", .ops = &call_ops, },
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{ .name = "callq", .ops = &call_ops, },
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