Hi, Peter,

On Mon, Aug 26, 2019 at 09:42:15AM +0200, Peter Zijlstra wrote:

On Sun, Aug 25, 2019 at 09:23:22PM +0800, Changbin Du wrote:

quoted

Add generic DWARF constant definitions. We will use it later.

Signed-off-by: Changbin Du <redacted>
---
 include/asm-generic/dwarf.h | 199 ++++++++++++++++++++++++++++++++++++
 1 file changed, 199 insertions(+)
 create mode 100644 include/asm-generic/dwarf.h

diff --git a/include/asm-generic/dwarf.h b/include/asm-generic/dwarf.h
new file mode 100644
index 000000000000..c705633c2a8f
--- /dev/null
+++ b/include/asm-generic/dwarf.h

@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Architecture independent definitions of DWARF.
+ *
+ * Copyright (C) 2019 Changbin Du <changbin.du@gmail.com>

You're claiming copyright on dwarf definitions? ;-)

I'm thinking only Oracle was daft enough to think stuff like that was
copyrightable.

ok, let me remove copyright line. I think SPDX claim is okay, right?

Also; I think it would be very good to not use/depend on DWARF for this.

It only includes the DWARF expersion opcodes, not all of dwarf stuffs.

You really don't need all of DWARF; I'm thikning you only need a few
types; for location we already have regs_get_kernel_argument() which
has all the logic to find the n-th argument.

regs_get_kernel_argument() can handle most cases, but if the size of one paramater
exceeds 64bit (it is rare in kernel), we must recalculate the locations. So I think
dwarf location descriptor is the most accurate one.

-- 
Cheers,
Changbin Du

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