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Differential D23395

Remove unused fields from struct pcb.
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Authored by jhb on Jan 28 2020, 11:31 AM.
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Details

Reviewers
br
mhorne
jrtc27
Commits
rS357305: Remove unused fields from struct pcb.
Summary

cpu_switch/throw() and savectx() do not save or restore any values
in these fields which mostly held non-callee-save registers.

makectx() copied these fields from kdb_frame, but they weren't used
except for PC_REGS using pcb_sepc. Change PC_REGS to use
kdb_frame->tf_sepc directly instead.

Test Plan
  • booted qemu, stack traces work for both curthread and other threads in ddb

Diff Detail

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Build Status
Buildable 28972
Build 26951: arc lint + arc unit

Revision Contents
Changeset List

PathSize
sys/
riscv/
include/
2 lines
3 lines
riscv/
2 lines
3 lines

Diff 67397

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sys/riscv/include/db_machdep.h

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sys/riscv/include/pcb.h

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sys/riscv/riscv/genassym.c

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sys/riscv/riscv/machdep.c

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