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Russ Cox dd82d5e728 runtime: fix traceback of crash before LR is stored
This fixes runtime's TestBreakpoint on ppc64:
the Breakpoint frame was not showing up in the trace.

It seems like f.frame should be either the frame size
including the saved LR (if any) or the frame size
not including the saved LR.

On ppc64, f.frame is the frame size not including the saved LR.

On arm, f.frame is the frame size not including the saved LR,
except when that's -4, f.frame is 0 instead.

The code here in the runtime expects that f.frame is the frame
size including the saved LR.

Since all three disagree and nothing else uses f.frame anymore,
stop using it here too. Use funcspdelta, which tells us the exact
difference between the FP and SP. If it's zero, LR has not been
saved yet, so the one saved for sigpanic should be recorded.

This fixes TestBreakpoint on both ppc64 and ppc64le.
I don't really understand how it ever worked there.

Change-Id: I2d2c580d5c0252cc8471e828980aeedcab76858d
Reviewed-on: https://go-review.googlesource.com/6430
Reviewed-by: Minux Ma <minux@golang.org>
2015-03-02 05:32:05 +00:00
api runtime: add GODEBUG=gccheckmark=0/1 2015-01-12 16:36:50 +00:00
doc doc/contribute.html rewrite "Set up auth... code review". 2015-03-02 02:11:58 +00:00
lib/time remove the obsolete lib/codereview. 2014-12-08 07:51:54 +00:00
misc [dev.cc] misc/nacl: add testdata for cmd/internal/rsc.io/x86/x86asm 2015-02-23 17:14:24 +00:00
src runtime: fix traceback of crash before LR is stored 2015-03-02 05:32:05 +00:00
test cmd/internal/gc: transitive inlining 2015-02-26 17:36:00 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore [dev.cc] cmd/new5a etc, cmd/internal/asm: edit to produce working Go code 2015-01-21 19:42:58 +00:00
AUTHORS A+C: add another email address for Emil Hessman 2014-11-12 10:01:23 -08:00
CONTRIBUTING.md doc: direct people to the mailing list 2015-01-18 21:27:07 +00:00
CONTRIBUTORS C: add Nick Cooper (Google CLA). 2014-11-14 17:03:17 +11:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md doc: fix broken link in README 2015-02-19 05:50:57 +00:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

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