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arm: Allow the first function to use linked register as return pc

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For a crash at the function entry with corrupted PC, the caller's PC
could be lying in the link register. Using the PC from link register
would be more effective than blindly scanning the stack immediately.

Change-Id: I51673b7298e70faeeab2bfa97075e3c4793f94bc
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2678992
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This commit is contained in:
Sim Sun 2021-02-06 04:27:41 -08:00 • committed by Mike Frysinger
parent 2d3e030fdb
commit f2b3ab5e0a
3 changed files with 33 additions and 1 deletions
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2
src/processor/microdump_processor_unittest.cc
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@ -232,7 +232,7 @@ TEST_F(MicrodumpProcessorTest, TestProcessMultiple) {
ASSERT_EQ("arm", state.system_info()->cpu);
ASSERT_EQ("lge/p1_tmo_us/p1:6.0/MRA58K/1603210524c8d:user/release-keys",
state.system_info()->os_version);
ASSERT_EQ(5U, state.threads()->at(0)->frames()->size());
ASSERT_EQ(6U, state.threads()->at(0)->frames()->size());
}
TEST_F(MicrodumpProcessorTest, TestProcessMips) {