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Differential D24931

Simplify hot-patching cpu_switch() for lack of UserLocal register.
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Authored by jhb on May 20 2020, 5:21 PM.
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F151405501: D24931.id72034.diff
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F151391594: D24931.id72050.diff
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Details

Reviewers
brooks
alfredo.mazzinghi_cl.cam.ac.uk
Commits
rS361296: Simplify hot-patching cpu_switch() for lack of UserLocal register.
Summary

Rather than walking all of cpu_switch looking for the sequence of
instructions to patch, add a global label at the location that needs
the patch applied.

Test Plan
  • booted mips64 under QEMU which does not implement UL and requires the hot patching to work

Diff Detail

Lint
Lint Passed
Unit
No Test Coverage
Build Status
Buildable 31202
Build 28857: arc lint + arc unit

Revision Contents
Changeset List

PathSize
sys/
mips/
include/
1 line
mips/
55 lines
2 lines

Diff 72034

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sys/mips/include/md_var.h

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sys/mips/mips/cpu.c

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sys/mips/mips/swtch.S

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